Patent Application
20240260002
This disclosure relates to a wireless communication system.
Sidelink (SL) communication is a communication scheme in which a direct link is established between User Equipments (UEs) and the UEs exchange voice and data directly with each other without intervention of a base station. SL communication is under consideration as a solution to the overhead of a base station caused by rapidly increasing data traffic. Vehicle-to-everything (V2X) refers to a communication technology through which a vehicle exchanges information with another vehicle, a pedestrian, an object having an infrastructure (or infra) established therein, and so on. The V2X may be divided into 4 types, such as vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-network (V2N), and vehicle-to-pedestrian (V2P). The V2X communication may be provided via a PC5 interface and/or Uu interface.
Meanwhile, as a wider range of communication devices require larger communication capacities, the need for mobile broadband communication that is more enhanced than the existing Radio Access Technology (RAT) is rising. Accordingly, discussions are made on services and user equipment (UE) that are sensitive to reliability and latency. And, a next generation radio access technology that is based on the enhanced mobile broadband communication, massive Machine Type Communication (MTC), Ultra-Reliable and Low Latency Communication (URLLC), and so on, may be referred to as a new radio access technology (RAT) or new radio (NR). Herein, the NR may also support vehicle-to-everything (V2X) communication.
Meanwhile, if the UE performs partial sensing, the UE needs to determine the range of the partial sensing (e.g., the range/number of slots that are subject to partial sensing). For example, if the range of the partial sensing is not defined, the UE may perform monitoring for a relatively long time interval, which may cause unnecessary power consumption of the UE. For example, if the range of the partial sensing is not defined, the UE may perform monitoring for a relatively short time interval. In this case, the UE may not be able to detect resource conflicts with other UEs, and the reliability of SL transmission may not be guaranteed due to resource conflicts.
In an embodiment, provided is a method for performing wireless communication by a first device. The method may comprise: triggering resource selection in a first slot; selecting Y candidate slots within a selection window determined based on the first slot; monitoring at least one slot related to the Y candidate slots, based on at least one resource reservation period for periodic-based partial sensing (PBPS); and selecting at least one candidate resource within the Y candidate slots based on the monitoring, wherein the at least one slot is determined based on whether information for monitoring an additional sensing occasion is configured for the first device.
In an embodiment, provided is a first device adapted to perform wireless communication. The first device may comprise: one or more memories storing instructions; one or more transceivers; and one or more processors connected to the one or more memories and the one or more transceivers. The one or more processors may execute the instructions to: trigger resource selection in a first slot; select Y candidate slots within a selection window determined based on the first slot; monitor at least one slot related to the Y candidate slots, based on at least one resource reservation period for periodic-based partial sensing (PBPS); and select at least one candidate resource within the Y candidate slots based on the monitoring, wherein the at least one slot is determined based on whether information for monitoring an additional sensing occasion is configured for the first device.
In an embodiment, provided is an apparatus adapted to control a first user equipment (UE). The apparatus may comprise: one or more processors; and one or more memories operably connected to the one or more processors and storing instructions. The one or more processors may execute the instructions to: trigger resource selection in a first slot; select Y candidate slots within a selection window determined based on the first slot; monitor at least one slot related to the Y candidate slots, based on at least one resource reservation period for periodic-based partial sensing (PBPS); and select at least one candidate resource within the Y candidate slots based on the monitoring, wherein the at least one slot is determined based on whether information for monitoring an additional sensing occasion is configured for the first UE.
The UE can perform partial sensing efficiently.
In the present disclosure, “A or B” may mean “only A”, “only B” or “both A and B.” In other words, in the present disclosure, “A or B” may be interpreted as “A and/or B”. For example, in the present disclosure, “A, B, or C” may mean “only A”, “only B”, “only C”, or “any combination of A, B. C”.
A slash (/) or comma used in the present disclosure may mean “and/or”. For example, “A/B” may mean “A and/or B”. Accordingly, “A/B” may mean “only A”. “only B”, or “both A and B”. For example. “A, B, C” may mean “A, B. or C”.
In the present disclosure, “at least one of A and B” may mean “only A”, “only B”, or “both A and B”. In addition, in the present disclosure, the expression “at least one of A or B” or “at least one of A and/or B” may be interpreted as “at least one of A and B”.
In addition, in the present disclosure, “at least one of A, B, and C” may mean “only A”, “only B”, “only C”, or “any combination of A, B, and C”. In addition, “at least one of A, B, or C” or “at least one of A. B. and/or C” may mean “at least one of A, B. and C”.
In addition, a parenthesis used in the present disclosure may mean “for example”. Specifically, when indicated as “control information (PDCCH)”, it may mean that “PDCCH” is proposed as an example of the “control information”. In other words, the “control information” of the present disclosure is not limited to “PDCCH”, and “PDCCH” may be proposed as an example of the “control information”. In addition, when indicated as “control information (i.e., PDCCH)”, it may also mean that “PDCCH” is proposed as an example of the “control information”.
In the following description, ‘when, if, or in case of’ may be replaced with ‘based on’.
A technical feature described individually in one figure in the present disclosure may be individually implemented, or may be simultaneously implemented.
In the present disclosure, a higher layer parameter may be a parameter which is configured, pre-configured or pre-defined for a UE. For example, a base station or a network may transmit the higher layer parameter to the UE. For example, the higher layer parameter may be transmitted through radio resource control (RRC) signaling or medium access control (MAC) signaling.
The technology described below may be used in various wireless communication systems such as code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), and so on. The CDMA may be implemented with a radio technology, such as universal terrestrial radio access (UTRA) or CDMA-2000. The TDMA may be implemented with a radio technology, such as global system for mobile communications (GSM)/general packet ratio service (GPRS)/enhanced data rate for GSM evolution (EDGE). The OFDMA may be implemented with a radio technology, such as institute of electrical and electronics engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, evolved UTRA (E-UTRA), and so on. IEEE 802.16m is an evolved version of IEEE 802.16e and provides backward compatibility with a system based on the IEEE 802.16e. The UTRA is part of a universal mobile telecommunication system (UMTS). 3rd generation partnership project (3GPP) long term evolution (LTE) is part of an evolved UMTS (E-UMTS) using the E-UTRA. The 3GPP LTE uses the OFDMA in a downlink and uses the SC-FDMA in an uplink. LTE-advanced (LTE-A) is an evolution of the LTE.
5G NR is a successive technology of LTE-A corresponding to a new Clean-slate type mobile communication system having the characteristics of high performance, low latency, high availability, and so on. 5G NR may use resources of all spectrum available for usage including low frequency bands of less than 1 GHz, middle frequency bands ranging from 1 GHz to 10 GHz, high frequency (millimeter waves) of 24 GHz or more, and so on.
For clarity in the description, the following description will mostly focus on 5G NR. However, technical features according to an embodiment of the present disclosure will not be limited only to this.
Referring to
The embodiment of
Layers of a radio interface protocol between the UE and the network can be classified into a first layer (layer 1, L1), a second layer (layer 2, L2), and a third layer (layer 3. L3) based on the lower three layers of the open system interconnection (OSI) model that is well-known in the communication system. Among them, a physical (PHY) layer belonging to the first layer provides an information transfer service by using a physical channel, and a radio resource control (RRC) layer belonging to the third layer serves to control a radio resource between the UE and the network. For this, the RRC layer exchanges an RRC message between the UE and the BS.
Referring to
Between different physical layers, i.e., a physical layer of a transmitter and a physical layer of a receiver, data are transferred through the physical channel. The physical channel is modulated using an orthogonal frequency division multiplexing (OFDM) scheme, and utilizes time and frequency as a radio resource.
The MAC layer provides services to a radio link control (RLC) layer, which is a higher layer of the MAC layer, via a logical channel. The MAC layer provides a function of mapping multiple logical channels to multiple transport channels. The MAC layer also provides a function of logical channel multiplexing by mapping multiple logical channels to a single transport channel. The MAC layer provides data transfer services over logical channels.
The RLC layer performs concatenation, segmentation, and reassembly of Radio Link Control Service Data Unit (RLC SDU). In order to ensure diverse quality of service (QoS) required by a radio bearer (RB), the RLC layer provides three types of operation modes, i.e., a transparent mode (TM), an unacknowledged mode (UM), and an acknowledged mode (AM). An AM RLC provides error correction through an automatic repeat request (ARQ).
A radio resource control (RRC) layer is defined only in the control plane. The RRC layer serves to control the logical channel, the transport channel, and the physical channel in association with configuration, reconfiguration and release of RBs. The RB is a logical path provided by the first layer (i.e., the physical layer or the PHY layer) and the second layer (i.e., a MAC layer, an RLC layer, a packet data convergence protocol (PDCP) layer, and a service data adaptation protocol (SDAP) layer) for data delivery between the UE and the network.
Functions of a packet data convergence protocol (PDCP) layer in the user plane include user data delivery, header compression, and ciphering. Functions of a PDCP layer in the control plane include control-plane data delivery and ciphering/integrity protection.
A service data adaptation protocol (SDAP) layer is defined only in a user plane. The SDAP layer performs mapping between a Quality of Service (QoS) flow and a data radio bearer (DRB) and QoS flow ID (QFI) marking in both DL and UL packets.
The configuration of the RB implies a process for specifying a radio protocol layer and channel properties to provide a particular service and for determining respective detailed parameters and operations. The RB can be classified into two types, i.e., a signaling RB (SRB) and a data RB (DRB). The SRB is used as a path for transmitting an RRC message in the control plane. The DRB is used as a path for transmitting user data in the user plane.
When an RRC connection is established between an RRC layer of the UE and an RRC layer of the E-UTRAN, the UE is in an RRC_CONNECTED state, and, otherwise, the UE may be in an RRC_IDLE state. In case of the NR, an RRC_INACTIVE state is additionally defined, and a UE being in the RRC_INACTIVE state may maintain its connection with a core network whereas its connection with the BS is released.
Data is transmitted from the network to the UE through a downlink transport channel. Examples of the downlink transport channel include a broadcast channel (BCH) for transmitting system information and a downlink-shared channel (SCH) for transmitting user traffic or control messages. Traffic of downlink multicast or broadcast services or the control messages can be transmitted on the downlink-SCH or an additional downlink multicast channel (MCH). Data is transmitted from the UE to the network through an uplink transport channel. Examples of the uplink transport channel include a random access channel (RACH) for transmitting an initial control message and an uplink SCH for transmitting user traffic or control messages.
Examples of logical channels belonging to a higher channel of the transport channel and mapped onto the transport channels include a broadcast channel (BCCH), a paging control channel (PCCH), a common control channel (CCCH), a multicast control channel (MCCH), a multicast traffic channel (MTCH), etc.
Referring to
In case of using a normal CP, each slot may include 14 symbols. In case of using an extended CP, each slot may include 12 symbols. Herein, a symbol may include an OFDM symbol (or CP-OFDM symbol) and a Single Carrier-FDMA (SC-FDMA) symbol (or Discrete Fourier Transform-spread-OFDM (DFT-s-OFDM) symbol).
Table 1 shown below represents an example of a number of symbols per slot (Nslotsymb), a number slots per frame (Nframe,uslot), and a number of slots per subframe (Nsubframe,uslot) based on an SCS configuration (u), in a case where a normal CP is used.
Table 2 shows an example of a number of symbols per slot, a number of slots per frame, and a number of slots per subframe based on the SCS, in a case where an extended CP is used.
In an NR system, OFDM(A) numerologies (e.g., SCS, CP length, and so on) between multiple cells being integrate to one UE may be differently configured. Accordingly, a (absolute time) duration (or section) of a time resource (e.g., subframe, slot or TTI) (collectively referred to as a time unit (TU) for simplicity) being configured of the same number of symbols may be differently configured in the integrated cells.
In the NR, multiple numerologies or SCSs for supporting diverse 5G services may be supported. For example, in case an SCS is 15 kHz, a wide area of the conventional cellular bands may be supported, and, in case an SCS is 30 kHz/60 kHz a dense-urban, lower latency, wider carrier bandwidth may be supported. In case the SCS is 60 kHz or higher, a bandwidth that is greater than 24.25 GHz may be used in order to overcome phase noise.
An NR frequency band may be defined as two different types of frequency ranges. The two different types of frequency ranges may be FR1 and FR2. The values of the frequency ranges may be changed (or varied), and, for example, the two different types of frequency ranges may be as shown below in Table 3. Among the frequency ranges that are used in an NR system, FR1 may mean a “sub 6 GHz range”, and FR2 may mean an “above 6 GHz range” and may also be referred to as a millimeter wave (mmW).
As described above, the values of the frequency ranges in the NR system may be changed (or varied). For example, as shown below in Table 4, FR1 may include a band within a range of 410 MHz to 7125 MHz. More specifically. FR1 may include a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, and so on) and higher. For example, a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, and so on) and higher being included in FR1 mat include an unlicensed band. The unlicensed band may be used for diverse purposes, e.g., the unlicensed band for vehicle-specific communication (e.g., automated driving).
Referring to
A carrier includes a plurality of subcarriers in a frequency domain. A Resource Block (RB) may be defined as a plurality of consecutive subcarriers (e.g., 12 subcarriers) in the frequency domain. A Bandwidth Part (BWP) may be defined as a plurality of consecutive (Physical) Resource Blocks ((P)RBs) in the frequency domain, and the BWP may correspond to one numerology (e.g., SCS, CP length, and so on). A carrier may include a maximum of N number BWPs (e.g., 5 BWPs). Data communication may be performed via an activated BWP. Each element may be referred to as a Resource Element (RE) within a resource grid and one complex symbol may be mapped to each element.
Hereinafter, a bandwidth part (BWP) and a carrier will be described.
The BWP may be a set of consecutive physical resource blocks (PRBs) in a given numerology. The PRB may be selected from consecutive sub-sets of common resource blocks (CRBs) for the given numerology on a given carrier
For example, the BWP may be at least any one of an active BWP, an initial BWP, and/or a default BWP. For example, the UE may not monitor downlink radio link quality in a DL BWP other than an active DL BWP on a primary cell (PCell). For example, the UE may not receive PDCCH, physical downlink shared channel (PDSCH), or channel state information—reference signal (CSI-RS) (excluding RRM) outside the active DL BWP. For example, the UE may not trigger a channel state information (CSI) report for the inactive DL BWP. For example, the UE may not transmit physical uplink control channel (PUCCH) or physical uplink shared channel (PUSCH) outside an active UL BWP. For example, in a downlink case, the initial BWP may be given as a consecutive RB set for a remaining minimum system information (RMSI) control resource set (CORESET) (configured by physical broadcast channel (PBCH)). For example, in an uplink case, the initial BWP may be given by system information block (SIB) for a random access procedure. For example, the default BWP may be configured by a higher layer. For example, an initial value of the default BWP may be an initial DL BWP. For energy saving, if the UE fails to detect downlink control information (DCI) during a specific period, the UE may switch the active BWP of the UE to the default BWP.
Meanwhile, the BWP may be defined for SL. The same SL BWP may be used in transmission and reception. For example, a transmitting UE may transmit a SL channel or a SL signal on a specific BWP, and a receiving UE may receive the SL channel or the SL signal on the specific BWP. In a licensed carrier, the SL BWP may be defined separately from a Uu BWP, and the SL BWP may have configuration signaling separate from the Uu BWP. For example, the UE may receive a configuration for the SL BWP from the BS/network. For example, the UE may receive a configuration for the Uu BWP from the BS/network. The SL BWP may be (pre-)configured in a carrier with respect to an out-of-coverage NR V2X UE and an RRC_IDLE UE. For the UE in the RRC_CONNECTED mode, at least one SL BWP may be activated in the carrier.
Referring to
The BWP may be configured by a point A, an offset NstartBWP from the point A, and a bandwidth NsizeBWP. For example, the point A may be an external reference point of a PRB of a carrier in which a subcarrier 0 of all numerologies (e.g., all numerologies supported by a network on that carrier) is aligned. For example, the offset may be a PRB interval between a lowest subcarrier and the point A in a given numerology. For example, the bandwidth may be the number of PRBs in the given numerology.
Hereinafter, V2X or SL communication will be described.
A sidelink synchronization signal (SLSS) may include a primary sidelink synchronization signal (PSSS) and a secondary sidelink synchronization signal (SSSS), as a SL-specific sequence. The PSSS may be referred to as a sidelink primary synchronization signal (S-PSS), and the SSSS may be referred to as a sidelink secondary synchronization signal (S-SSS). For example, length-127 M-sequences may be used for the S-PSS, and length-127 gold sequences may be used for the S-SSS. For example, a UE may use the S-PSS for initial signal detection and for synchronization acquisition. For example, the UE may use the S-PSS and the S-SSS for acquisition of detailed synchronization and for detection of a synchronization signal ID.
A physical sidelink broadcast channel (PSBCH) may be a (broadcast) channel for transmitting default (system) information which must be first known by the UE before SL signal transmission/reception. For example, the default information may be information related to SLSS, a duplex mode (DM), a time division duplex (TDD) uplink/downlink (UL/DL) configuration, information related to a resource pool, a type of an application related to the SLSS, a subframe offset, broadcast information, or the like. For example, for evaluation of PSBCH performance, in NR V2X, a payload size of the PSBCH may be 56 bits including 24-bit cyclic redundancy check (CRC).
The S-PSS, the S-SSS, and the PSBCH may be included in a block format (e.g., SL synchronization signal (SS)/PSBCH block, hereinafter, sidelink-synchronization signal block (S-SSB)) supporting periodical transmission. The S-SSB may have the same numerology (i.e., SCS and CP length) as a physical sidelink control channel (PSCCH)/physical sidelink shared channel (PSSCH) in a carrier, and a transmission bandwidth may exist within a (pre-)configured sidelink (SL) BWP. For example, the S-SSB may have a bandwidth of 11 resource blocks (RBs). For example, the PSBCH may exist across 11 RBs. In addition, a frequency position of the S-SSB may be (pre-)configured. Accordingly, the UE does not have to perform hypothesis detection at frequency to discover the S-SSB in the carrier.
For example, (a) of
For example, (b) of
Referring to (a) of
For example, the first UE may receive information related to dynamic grant (DG) resource(s) and/or information related to configured grant (CG) resource(s) from the base station. For example, the CG resource(s) may include CG type 1 resource(s) or CG type 2 resource(s). In the present disclosure, the DG resource(s) may be resource(s) configured/allocated by the base station to the first UE through a downlink control information (DCI). In the present disclosure, the CG resource(s) may be (periodic) resource(s) configured/allocated by the base station to the first UE through a DCI and/or an RRC message. For example, in the case of the CG type 1 resource(s), the base station may transmit an RRC message including information related to CG resource(s) to the first UE. For example, in the case of the CG type 2 resource(s), the base station may transmit an RRC message including information related to CG resource(s) to the first UE, and the base station may transmit a DCI related to activation or release of the CG resource(s) to the first UE.
In step S610, the first UE may transmit a PSCCH (e.g., sidelink control information (SCI) or 1st-stage SCI) to a second UE based on the resource scheduling. In step S620, the first UE may transmit a PSSCH (e.g., 2nd-stage SCI, MAC PDU, data, etc.) related to the PSCCH to the second UE. In step S630, the first UE may receive a PSFCH related to the PSCCH/PSSCH from the second UE. For example, HARQ feedback information (e.g., NACK information or ACK information) may be received from the second UE through the PSFCH. In step S640, the first UE may transmit/report HARQ feedback information to the base station through the PUCCH or the PUSCH. For example, the HARQ feedback information reported to the base station may be information generated by the first UE based on the HARQ feedback information received from the second UE. For example, the HARQ feedback information reported to the base station may be information generated by the first UE based on a pre-configured rule. For example, the DCI may be a DCI for SL scheduling. For example, a format of the DC may be a DCI format 3_0 or a DCI format 3_1.
Hereinafter, an example of DCI format 3_0 will be described.
DCI format 3_0 is used for scheduling of NR PSCCH and NR PSSCH in one cell.
The following information is transmitted by means of the DCI format 3_0 with CRC scrambled by SL-RNTI or SL-CS-RNTI:
Referring to (b) of
Referring to (a) or (b) of
Hereinafter, an example of SCI format 1-A will be described.
SCI format 1-A is used for the scheduling of PSSCH and 2nd-stage-SCI on PSSCH.
The following information is transmitted by means of the SCI format 1-A:
Hereinafter, an example of SCI format 2-A will be described.
SCI format 2-A is used for the decoding of PSSCH, with HARQ operation when HARQ-ACK information includes ACK or NACK, when HARQ-ACK information includes only NACK, or when there is no feedback of HARQ-ACK information.
The following information is transmitted by means of the SCI format 2-A:
Hereinafter, an example of SCI format 2-B will be described
SCI format 2-B is used for the decoding of PSSCH, with HARQ operation when HARQ-ACK information includes only NACK, or when there is no feedback of HARQ-ACK information.
The following information is transmitted by means of the SCI format 2-B:
Referring to (a) or (b) of
Referring to (a) of
Hereinafter, a hybrid automatic repeat request (HARQ) procedure will be described.
For example, the SL HARQ feedback may be enabled for unicast. In this case, in a non-code block group (non-CBG) operation, if the receiving UE decodes a PSCCH of which a target is the receiving UE and if the receiving UE successfully decodes a transport block related to the PSCCH, the receiving UE may generate HARQ-ACK. In addition, the receiving UE may transmit the HARQ-ACK to the transmitting UE. Otherwise, if the receiving UE cannot successfully decode the transport block after decoding the PSCCH of which the target is the receiving UE, the receiving UE may generate the HARQ-NACK. In addition, the receiving UE may transmit HARQ-NACK to the transmitting UE.
For example, the SL HARQ feedback may be enabled for groupcast. For example, in the non-CBG operation, two HARQ feedback options may be supported for groupcast.
For example, if the groupcast option 1 is used in the SL HARQ feedback, all UEs performing groupcast communication may share a PSFCH resource. For example, UEs belonging to the same group may transmit HARQ feedback by using the same PSFCH resource.
For example, if the groupcast option 2 is used in the SL HARQ feedback, each UE performing groupcast communication may use a different PSFCH resource for HARQ feedback transmission. For example, UEs belonging to the same group may transmit HARQ feedback by using different PSFCH resources.
In the present disclosure. HARQ-ACK may be referred to as ACK, ACK information, or positive-ACK information, and HARQ-NACK may be referred to as NACK, NACK information, or negative-ACK information.
Hereinafter, UE procedure for determining the subset of resources to be reported to higher layers in PSSCH resource selection in sidelink resource allocation mode 2 will be described.
In resource allocation mode 2, the higher layer can request the UE to determine a subset of resources from which the higher layer will select resources for PSSCH/PSCCH transmission. To trigger this procedure, in slot n, the higher layer provides the following parameters for this PSSCH/PSCCH transmission:
The following higher layer parameters affect this procedure:
The resource reservation interval, Prsvp_TX, if provided, is converted from units of msec to units of logical slots, resulting in P′rsvp_TX.
Notation:
(t′SL0, t′SL1, t′SL2, . . . ) denotes the set of slots which belongs to the sidelink resource pool.
For example, the UE may select a set of candidate resources (SA) based on Table 8. For example, if resource (re)selection is triggered, the UE may select a set of candidate resources (SA) based on Table 8. For example, if re-evaluation or pre-emption is triggered, the UE may select a set of candidate resources (SA) based on Table 8.
Meanwhile, partial sensing may be supported for power saving of the UE. For example, in LTE SL or LTE V2X, the UE may perform partial sensing based on Tables 9 and 10.
Meanwhile, the conventional candidate resource selection method has the problem of deteriorating performance by applying only random selection to the first packet of periodic transmission.
Meanwhile, if the UE performs partial sensing, the UE needs to determine the range of the partial sensing (e.g., the range/number of slots that are subject to partial sensing). For example, if the range of the partial sensing is not defined, the UE may perform monitoring for a relatively long time interval, which may cause unnecessary power consumption of the UE. For example, if the range of the partial sensing is not defined, the UE may perform monitoring for a relatively short time interval. In this case, the UE may not be able to detect resource conflicts with other UEs, and the reliability of SL transmission may not be guaranteed due to resource conflicts. In the present disclosure, partial sensing may include periodic-based partial sensing (PPS) or continuous partial sensing (CPS). In the present disclosure, PPS may also be referred to as PBPS.
Based on various embodiments of the present disclosure, a method for selectively applying random selection and CPS-based resource selection to the first packet of periodic transmission, and an apparatus supporting the same are proposed. Based on various embodiments of the present disclosure, a method for selecting resource(s) for SL transmission that can minimize power consumption of a UE when the UE is operating based on partial sensing, and an apparatus supporting the same are proposed.
For example, in various embodiments of the disclosure, periodic-based partial sensing (PPS) may refer to performing sensing, based on the number of periods corresponding to specific configured value(s), at the time corresponding to an integer multiple (k) of each of the periods when performing sensing for resource selection. For example, the periods may be periods of transmission resources configured in a resource pool. For example, resources at the time before the integer multiple k value of each of the periods from the time of candidate resources that are the subject of the resource conflict determination may be sensed. For example, the k value may be configured in the form of a bitmap.
In the embodiments of
Referring to
Referring to
For example, in various embodiments of the present disclosure, continuous partial sensing (CPS) may refer to performing sensing for all or a part of a time domain given a specific configured value. For example, CPS may include a short-term sensing operation that performs sensing for a relatively short interval.
In the embodiment of
Referring to
Based on an embodiment of the present disclosure, if periodic transmission is allowed and partial sensing is configured in a resource pool, the following operation may be possible when the UE performs PPS to select periodic transmission resources due to triggering the selection of the periodic transmission resources in slot n.
For example, the UE may perform the PPS based on the transmission resource periods corresponding to the union of the transmission resource period(s) configured for the PPS and the transmission period of the packet to be transmitted by the UE based on a priority of the transmitted packet. For example, in order to avoid transmission conflicts with other UEs, the UE may perform the PPS based on the transmission resource periods corresponding to the union of the transmission resource period(s) configured for the PPS and the transmission period of the packet to be transmitted by the UE, only if a priority value of the transmitted packet is greater than or equal to a specific threshold. For example, the specific threshold may be a pre-emption priority value configured in the resource pool. For example, in order to increase the probability of successful reception of the packet to be transmitted, the UE may perform the PPS based on the transmission resource periods corresponding to the union of the transmission resource period(s) configured for the PPS and the transmission period of the packet to be transmitted by the UE, only if a priority value of the transmitted packet is less than or equal to a specific threshold.
For example, the UE may perform the PPS based on the transmission resource periods corresponding to the union of the transmission resource period(s) configured for the PPS and the transmission period of the packet to be transmitted by the UE, based on a congestion level or an interference level (e.g., channel busy ratio (CBR) or channel occupancy ratio (CR)) of a transmission channel. For example, if the CBR value or the CR value is greater than or equal to a specific threshold, the UE may perform the PPS based on the transmission resource periods corresponding to the union of the transmission resource period(s) configured for the PPS and the transmission period of the packet to be transmitted by the UE.
Table 11 shows an example of SL CBR and SL RSSI.
Referring to Table 11, the slot index may be based on a physical slot index.
Table 12 shows an example of SL Channel Occupancy Ratio (CR).
For example, the operation of including the transmission resource period of another UE and/or the transmission resource period of another UE included in the inter-UE coordination message received by the UE in the transmission resource periods for the PPS to be finally used by the UE may be determined based on a priority of a packet related to the transmission of another UE. For example, only if a priority value of the packet to be transmitted by another UE, obtained through the sensing or through the inter-UE coordination message, is less than or equal to a specific threshold, the UE may include the transmission resource period of another UE and/or the transmission resource period of another UE included in the inter-UE coordination message received by the UE in the transmission resource periods for the PPS to be finally used. For example, the specific threshold may be a pre-emption priority value configured in the resource pool. For example, the specific threshold may be a priority value of a packet to be transmitted by the UE.
For example, the operation described above in 1) through 11) may be performed, if the channel congestion, the interference level, or the channel busy ratio (CBR)/channel occupancy ratio (CR) value is greater than or equal to a specific threshold, or if the (remaining) PDB value is less than or equal to a specific threshold, or if the priority value of the packet transmission is less than or equal to a specific threshold, or if the minimum communication distance requirement for the packet transmission is greater than or equal to a specific threshold, or if the total number of (re)transmissions/remaining retransmissions for the packet transmission is less than or equal to a specific threshold, or if the number of candidate/available/transmission resources is less than or equal to a specific threshold, or if the resource selection window length is less than or equal to a specific threshold, or if the resource re-evaluation/pre-emption check (REV/PEC) is not configured, or if the HARQ feedback is disabled.
Based on an embodiment of the present disclosure, if periodic transmission is allowed and partial sensing is configured in a resource pool, the following operation may be possible when the UE performs CPS to select aperiodic transmission resource(s) due to triggering the selection of the aperiodic transmission resource(s) in slot n.
For example, in order for a UE-A to assist in resource selection of a UE-B, if the UE-A transmits to the UE-B a set of resources that is suitable for reception from the UE-B (hereinafter referred to as preferred resource) or a set of resources that is unsuitable for reception from the UE-B (hereinafter referred to as non-preferred resource), as an inter-UE coordination message, from the UE-A's perspective, the UE-B may select a resource selection window or Y candidate resources for PPS within the resource selection window to include the preferred resource of the UE-A and/or not to include the non-preferred resource of the UE-A.
For example, after the UE-B selects a resource selection window and Y candidate resources for PPS within the resource selection window, the UE-B may expand or shift the resource selection window to include the preferred resource from the UE-A and/or may exclude the non-preferred resource from the UE-A from the selected resource selection window and the candidate resources for PPS within the resource selection window.
For example, if the UE performs PPS and/or CPS to (re)select resource(s) for periodic transmission, e.g., if the UE transmits the first TB of periodic transmission or if there are insufficient partial sensing results due to SL DRX operation (e.g., if the number of partial sensing slots is less than or equal to a specific threshold), the UE may obtain partial sensing results for the longest transmission resource period configured in the TX resource pool to be used for the periodic transmission, and then perform the periodic transmission by selecting resource(s) based on the obtained partial sensing results. For example, the UE may transmit the first TB based on a resource selected based on random resource selection or based on CPS, and then perform periodic TB transmission after the first TB by selecting resources based on partial sensing results obtained during the longest transmission resource period.
For example, after the UE selects Y candidate slots for performing PPS to (re)select resources for periodic transmission, the UE may attempt to perform PPS for the most recent slots that are temporally ahead of each of the candidate slots by integer multiple k of transmission resource period(s) for PPS and ahead of the first candidate slot among the Y candidate slots. In this case, if the UE fails to monitor the most recent slots because the most recent slots overlap with the UL transmission time or with another transmission time of the UE itself, the UE may perform monitoring for slots corresponding to an integer multiple (k+1) that that are one transmission resource period ahead of the integer multiple k. If the UE fails to monitor for slots corresponding to the integer multiple (k+1) as described above, the UE may again monitor for slots corresponding to an integer multiple (k+2). The above process may be repeated as long as the conditions described above are satisfied, and an integer multiple corresponding to the final monitoring time may be determined.
For example, an additional_sensing_flag may be configured for the UE to enable sensing of additional sensing occasions in addition to monitoring for the most recent slots defined as described above (i.e., the most recent slots corresponding to the integer multiple k that can be monitored by the UE). In the present disclosure, the additional_sensing_flag may be information indicating that the UE additionally monitors periodic sensing occasions. If the additional_sensing_flag is not configured, the UE may only monitor the most recent slots (A) described above.
In the embodiment of
For example, if the information indicating to additionally monitor periodic sensing occasions (i.e., additional_sensing_flag) is configured, the UE may perform the operation.
In the embodiment of
For example, if additional_sensing_flag=I, the UE may additionally monitor the most recent slots that can be monitored by the UE prior to slots monitored in the case of additional_sensing_flag=0.
For example, if the UE performs PPS to select periodic transmission resources, and if a sensing occasion, which is prior to an integer multiple of any transmission period for PPS from any candidate slot time, is before a time that is prior to the length of a partial sensing window configured to be a specific threshold from the first candidate slot time, the UE may not perform monitoring for the sensing occasion.
For convenience of description, an example of determining slots that are subject to sensing/monitoring based on the length of the sensing window is described if the UE is configured with information indicating to additionally monitor periodic sensing occasions, but the technical idea of the present disclosure is not limited to the case where the UE is configured with information indicating to additionally monitor periodic sensing occasions. The embodiment of determining slots that are subject to sensing/monitoring based on the length of the sensing window can be applied even if the UE is not configured with information indicating to additionally monitor periodic sensing occasions.
In the embodiment of
For example, the above-described non-monitoring operation of sensing occasions may be applied only if the largest transmission period among transmission period(s) for the PPS is greater than a specific threshold. For example, if the largest transmission period among the transmission period(s) for the PPS is less than or equal to the specific threshold, within a time interval (e.g., the time interval may be 1100 ms, 1 s, or 100 ms) determined by a specific threshold before the first candidate slot time, the UE may monitor sensing occasions that are prior to an integer multiple having a range less than or equal to the smallest integer value greater than or equal to the length of a resource selection window divided by the transmission period(s) for the PPS from the candidate slot time. For example, the length of the partial sensing window may be the largest transmission period among transmission periods configured in the resource pool, or the largest transmission period among transmission period(s) configured for the PPS, or the largest transmission period among transmission periods applied by the TX UE for transmission of a plurality of packets. For example, the above-described operation may be applied if the TX UE is configured to monitor additional sensing occasions, including the most recent sensing occasions with respect to the first candidate slot.
For convenience of description, an example of determining slots that are subject to sensing/monitoring based on the length of the sensing window and the UE processing time is described if the UE is configured with information indicating to additionally monitor periodic sensing occasions, but the technical idea of the present disclosure is not limited to the case where the UE is configured with information indicating to additionally monitor periodic sensing occasions. The embodiment of determining slots that are subject to sensing/monitoring based on the length of the sensing window and the UE processing time can be applied even if the UE is not configured with information indicating to additionally monitor periodic sensing occasions.
In the embodiment of
Based on various embodiments of the present disclosure, resource conflicts can be minimized by selectively applying random selection and CPS-based resource selection for the first packet of periodic transmission. Furthermore, based on various embodiments of the disclosure, if the UE performs partial sensing, the range of the partial sensing (e.g., the range/number of slots subject to the partial sensing) of the UE can be clearly defined. For example, if the power consumption of the UE is a critical consideration, the information indicating to additionally monitor periodic sensing occasions may not be configured for the UE, and the UE may perform monitoring for a relatively short time interval. Thus, the UE may achieve a power saving gain. On the other hand, if more accurate sensing results are required, the information indicating to additionally monitor periodic sensing occasions may be configured for the UE, and the UE may perform monitoring for a relatively long time interval. Thus, resource conflicts between UEs can be minimized and the reliability of SL communication can be ensured.
For example, whether the rule is applied and/or the proposed method/rule related parameter value of the present disclosure may be configured/allowed specifically (or differently or independently) for a service type. For example, whether the rule is applied and/or the proposed method/rule related parameter value of the present disclosure may be configured/allowed specifically (or differently or independently) for a (LCH or service) priority. For example, whether the rule is applied and/or the proposed method/rule related parameter value of the present disclosure may be configured/allowed specifically (or differently or independently) for a QoS requirement (e.g., latency, reliability, minimum communication range). For example, whether the rule is applied and/or the proposed method/rule related parameter value of the present disclosure may be configured/allowed specifically (or differently or independently) for a PQI parameter. For example, whether the rule is applied and/or the proposed method/rule related parameter value of the present disclosure may be configured/allowed specifically (or differently or independently) for a HARQ feedback ENABLED LCH/MAC PDU (transmission). For example, whether the rule is applied and/or the proposed method/rule related parameter value of the present disclosure may be configured/allowed specifically (or differently or independently) for a HARQ feedback DISABLED LCH/MAC PDU (transmission). For example, whether the rule is applied and/or the proposed method/rule related parameter value of the present disclosure may be configured/allowed specifically (or differently or independently) for a CBR measurement value of a resource pool. For example, whether the rule is applied and/or the proposed method/rule related parameter value of the present disclosure may be configured/allowed specifically (or differently or independently) for a SL cast type (e.g., unicast, groupcast, broadcast). For example, whether the rule is applied and/or the proposed method/rule related parameter value of the present disclosure may be configured/allowed specifically (or differently or independently) for a SL groupcast HARQ feedback option (e.g., NACK only feedback, ACK/NACK feedback, NACK only feedback based on TX-RX distance). For example, whether the rule is applied and/or the proposed method/rule related parameter value of the present disclosure may be configured/allowed specifically (or differently or independently) for a SL mode 1 CG type (e.g., SL CG type 1 or SL CG type 2). For example, whether the rule is applied and/or the proposed method/rule related parameter value of the present disclosure may be configured/allowed specifically (or differently or independently) for a SL mode type (e.g., mode 1 or mode 2). For example, whether the rule is applied and/or the proposed method/rule related parameter value of the present disclosure may be configured/allowed specifically (or differently or independently) for a resource pool. For example, whether the rule is applied and/or the proposed method/rule related parameter value of the present disclosure may be configured/allowed specifically (or differently or independently) for whether a PSFCH resource is a configured resource pool. For example, whether the rule is applied and/or the proposed method/rule related parameter value of the present disclosure may be configured/allowed specifically (or differently or independently) for a source (L2) ID. For example, whether the rule is applied and/or the proposed method/rule related parameter value of the present disclosure may be configured/allowed specifically (or differently or independently) for a destination (L2) ID. For example, whether the rule is applied and/or the proposed method/rule related parameter value of the present disclosure may be configured/allowed specifically (or differently or independently) for a PC5 RRC connection link. For example, whether the rule is applied and/or the proposed method/rule related parameter value of the present disclosure may be configured/allowed specifically (or differently or independently) for a SL link. For example, whether the rule is applied and/or the proposed method/rule related parameter value of the present disclosure may be configured/allowed specifically (or differently or independently) for a connection state (e.g., RRC CONNECTED state, IDLE state, INACTIVE state) (with a base station). For example, whether the rule is applied and/or the proposed method/rule related parameter value of the present disclosure may be configured/allowed specifically (or differently or independently) for a SL HARQ process (ID). For example, whether the rule is applied and/or the proposed method/rule related parameter value of the present disclosure may be configured/allowed specifically (or differently or independently) for whether to perform SL DRX operation (of TX UE or RX UE). For example, whether the rule is applied and/or the proposed method/rule related parameter value of the present disclosure may be configured/allowed specifically (or differently or independently) for whether a power saving (TX or RX) UE. For example, whether the rule is applied and/or the proposed method/rule related parameter value of the present disclosure may be configured/allowed specifically (or differently or independently) for a case where (from a specific UE perspective) PSFCH TX and PSFCH RX (and/or a plurality of PSFCH TX (exceeding UE capabilities)) overlap (and/or PSFCH TX (and/or PSFCH RX) is omitted). For example, whether the rule is applied and/or the proposed method/rule related parameter value of the present disclosure may be configured/allowed specifically (or differently or independently) for a case where the RX UE actually (successfully) receives PSCCH (and/or PSSCH) (re)transmission from the TX UE.
For example, in the present disclosure, the term “configure/configured (or designate/designated)” may be extended and interpreted as a form in which the base station informs the UE through a pre-defined (physical layer or higher layer) channel/signal (e.g., SIB, RRC, MAC CE) (and/or a form in which the UE informs other UEs through a pre-defined (physical layer or higher layer) channel/signal (e.g., SL MAC CE, PC5 RRC)).
For example, in the present disclosure, the term “PSFCH” may be extended and interpreted as (NR or LTE) PSSCH (and/or (NR or LTE) PSCCH)(and/or (NR or LTE) SL SSB (and/or UL channel/signal)). In addition, the proposed methods of the present disclosure may be used in combination with each other (as a new type).
For example, in the present disclosure, a specific threshold may refer to a threshold pre-defined or (pre-)configured by the network or the base station or the upper layer (including the application layer) of the UE. For example, in the present disclosure, a specific configured threshold may refer to a value pre-defined or (pre-)configured by the network or the base station or the upper layer (including the application layer) of the UE. For example, the operation configured by the network/base station may refer to the operation in which the base station (pre-)configures to the UE through higher layer RRC signaling, configures/signals to the UE through MAC CE, or signals the UE through DCI.
Referring to
For example, based on that the information for monitoring the additional sensing occasion is not configured for the first device, the at least one slot may be at least one slot included in a most recent sensing occasion for the at least one resource reservation period from the Y candidate slots. For example, among the most recent sensing occasion for the at least one resource reservation period from the Y candidate slots, a sensing occasion earlier than a second slot determined by a length of a sensing window may not be monitored by the first device. For example, the length of the sensing window may be 100 milliseconds or 1100 milliseconds. For example, the at least one slot may be at least one sensing occasion not earlier than a second slot determined by a length of a sensing window, among the most recent sensing occasion for the at least one resource reservation period from the Y candidate slots. For example, the at least one slot may be at least one sensing occasion prior to a first one of the Y candidate slots, among the most recent sensing occasion for the at least one resource reservation period from the Y candidate slots. For example, the at least one slot may be at least one sensing occasion prior to a processing time from a first one of the Y candidate slots, among the most recent sensing occasion for the at least one resource reservation period from the Y candidate slots. For example, based on that the information for monitoring the additional sensing occasion is not configured for the first device, a last sensing occasion for the at least one resource reservation period from the most recent sensing occasion may not be monitored by the first device.
For example, based on that the information for monitoring the additional sensing occasion is configured for the first device, the at least one slot may be at least one slot included in a most recent sensing occasion for the at least one resource reservation period from the Y candidate slots and a last sensing occasion for the at least one resource reservation period from the most recent sensing occasion. For example, a sensing occasion, among the most recent sensing occasion for the at least one resource reservation period from the Y candidate slots and the last sensing occasion for the at least one resource reservation period from the most recent sensing occasion, earlier than a second slot determined by a length of a sensing window may not be monitored by the first device. For example, the at least one slot may be at least one sensing occasion not earlier than a second slot determined by a length of a sensing window, among the most recent sensing occasion for the at least one resource reservation period from the Y candidate slots and the last sensing occasion for the at least one resource reservation period from the most recent sensing occasion. For example, the at least one slot may be at least one sensing occasion prior to a first one of the Y candidate slots, among the most recent sensing occasion for the at least one resource reservation period from the Y candidate slots and the last sensing occasion for the at least one resource reservation period from the most recent sensing occasion.
Additionally, for example, the first device may obtain at least one resource reservation period for the PBPS. For example, the at least one resource reservation period for the PBPS may be a subset of one or more resource reservation periods configured for a resource pool.
The proposed method can be applied to the device(s) based on various embodiments of the present disclosure. First, the processor 102 of the first device 100 may trigger resource selection in a first slot. In addition, the processor 102 of the first device 100 may select Y candidate slots within a selection window determined based on the first slot. In addition, the processor 102 of the first device 100 may monitor at least one slot related to the Y candidate slots, based on at least one resource reservation period for periodic-based partial sensing (PBPS). In addition, the processor 102 of the first device 100 may select at least one candidate resource within the Y candidate slots based on the monitoring. For example, the at least one slot may be determined based on whether information for monitoring an additional sensing occasion is configured for the first device.
Based on an embodiment of the present disclosure, a first device adapted to perform wireless communication may be provided. For example, the first device may comprise: one or more memories storing instructions; one or more transceivers; and one or more processors connected to the one or more memories and the one or more transceivers. For example, the one or more processors may execute the instructions to: trigger resource selection in a first slot; select Y candidate slots within a selection window determined based on the first slot: monitor at least one slot related to the Y candidate slots, based on at least one resource reservation period for periodic-based partial sensing (PBPS); and select at least one candidate resource within the Y candidate slots based on the monitoring. For example, the at least one slot may be determined based on whether information for monitoring an additional sensing occasion is configured for the first device.
Based on an embodiment of the present disclosure, an apparatus adapted to control a first user equipment (UE) may be provided. For example, the apparatus may comprise: one or more processors; and one or more memories operably connected to the one or more processors and storing instructions. For example, the one or more processors may execute the instructions to: trigger resource selection in a first slot; select Y candidate slots within a selection window determined based on the first slot; monitor at least one slot related to the Y candidate slots, based on at least one resource reservation period for periodic-based partial sensing (PBPS); and select at least one candidate resource within the Y candidate slots based on the monitoring. For example, the at least one slot may be determined based on whether information for monitoring an additional sensing occasion is configured for the first UE.
Based on an embodiment of the present disclosure, a non-transitory computer-readable storage medium storing instructions may be provided. For example, the instructions, when executed, may cause a first device to: trigger resource selection in a first slot: select Y candidate slots within a selection window determined based on the first slot; monitor at least one slot related to the Y candidate slots, based on at least one resource reservation period for periodic-based partial sensing (PBPS); and select at least one candidate resource within the Y candidate slots based on the monitoring. For example, the at least one slot may be determined based on whether information for monitoring an additional sensing occasion is configured for the first device.
Referring to
For example, based on that the information for monitoring the additional sensing occasion is not configured for the first device, the at least one slot may be at least one slot included in a most recent sensing occasion for the at least one resource reservation period from the Y candidate slots. For example, among the most recent sensing occasion for the at least one resource reservation period from the Y candidate slots, a sensing occasion earlier than a second slot determined by a length of a sensing window may not be monitored by the first device. For example, the length of the sensing window may be 100 milliseconds or 1100 milliseconds. For example, the at least one slot may be at least one sensing occasion not earlier than a second slot determined by a length of a sensing window, among the most recent sensing occasion for the at least one resource reservation period from the Y candidate slots. For example, the at least one slot may be at least one sensing occasion prior to a first one of the Y candidate slots, among the most recent sensing occasion for the at least one resource reservation period from the Y candidate slots. For example, the at least one slot may be at least one sensing occasion prior to a processing time from a first one of the Y candidate slots, among the most recent sensing occasion for the at least one resource reservation period from the Y candidate slots. For example, based on that the information for monitoring the additional sensing occasion is not configured for the first device, a last sensing occasion for the at least one resource reservation period from the most recent sensing occasion may not be monitored by the first device.
For example, based on that the information for monitoring the additional sensing occasion is configured for the first device, the at least one slot may be at least one slot included in a most recent sensing occasion for the at least one resource reservation period from the Y candidate slots and a last sensing occasion for the at least one resource reservation period from the most recent sensing occasion. For example, a sensing occasion, among the most recent sensing occasion for the at least one resource reservation period from the Y candidate slots and the last sensing occasion for the at least one resource reservation period from the most recent sensing occasion, earlier than a second slot determined by a length of a sensing window may not be monitored by the first device. For example, the at least one slot may be at least one sensing occasion not earlier than a second slot determined by a length of a sensing window, among the most recent sensing occasion for the at least one resource reservation period from the Y candidate slots and the last sensing occasion for the at least one resource reservation period from the most recent sensing occasion. For example, the at least one slot may be at least one sensing occasion prior to a first one of the Y candidate slots, among the most recent sensing occasion for the at least one resource reservation period from the Y candidate slots and the last sensing occasion for the at least one resource reservation period from the most recent sensing occasion.
Additionally, for example, the first device may obtain at least one resource reservation period for the PBPS. For example, the at least one resource reservation period for the PBPS may be a subset of one or more resource reservation periods configured for a resource pool.
The proposed method can be applied to the device(s) based on various embodiments of the present disclosure. First, the processor 202 of the second device 200 may control the transceiver 206 to receive, from a first device through a physical sidelink control channel (PSCCH), first sidelink control information (SCI) for scheduling of second SCI and a physical sidelink shared channel (PSSCH), based on a sidelink (SL) resource. In addition, the processor 202 of the second device 200 may control the transceiver 206 to receive, from the first device through the PSSCH, the second SCI and a media access control (MAC) protocol data unit (PDU), based on the SL resource. For example, Y candidate slots may be selected by the first device within a selection window determined based on a first slot in which resource selection is triggered. For example, based on at least one resource reservation period for periodic-based partial sensing (PBPS), monitoring for at least one slot related to the Y candidate slots may be performed by the first device. For example, at least one candidate resource within the Y candidate slots may be selected by the first device based on the monitoring. For example, the SL resource may be selected by the first device among the at least one candidate resource. For example, the at least one slot may be determined based on whether information for monitoring an additional sensing occasion is configured for the first device.
Based on an embodiment of the present disclosure, a second device adapted to perform wireless communication may be provided. For example, the second device may comprise: one or more memories storing instructions; one or more transceivers: and one or more processors connected to the one or more memories and the one or more transceivers. For example, the one or more processors may execute the instructions to: receive, from a first device through a physical sidelink control channel (PSCCH), first sidelink control information (SCI) for scheduling of second SCI and a physical sidelink shared channel (PSSCH), based on a sidelink (SL) resource: and receive, from the first device through the PSSCH, the second SCI and a media access control (MAC) protocol data unit (PDU), based on the SL resource. For example, Y candidate slots may be selected by the first device within a selection window determined based on a first slot in which resource selection is triggered. For example, based on at least one resource reservation period for periodic-based partial sensing (PBPS), monitoring for at least one slot related to the Y candidate slots may be performed by the first device. For example, at least one candidate resource within the Y candidate slots may be selected by the first device based on the monitoring. For example, the SL resource may be selected by the first device among the at least one candidate resource. For example, the at least one slot may be determined based on whether information for monitoring an additional sensing occasion is configured for the first device.
Based on an embodiment of the present disclosure, an apparatus adapted to control a second user equipment (UE) may be provided. For example, the apparatus may comprise: one or more processors; and one or more memories operably connected to the one or more processors and storing instructions. For example, the one or more processors may execute the instructions to: receive, from a first UE through a physical sidelink control channel (PSCCH), first sidelink control information (SCI) for scheduling of second SCI and a physical sidelink shared channel (PSSCH), based on a sidelink (SL) resource: and receive, from the first UE through the PSSCH, the second SCI and a media access control (MAC) protocol data unit (PDU), based on the SL resource. For example, Y candidate slots may be selected by the first UE within a selection window determined based on a first slot in which resource selection is triggered. For example, based on at least one resource reservation period for periodic-based partial sensing (PBPS), monitoring for at least one slot related to the Y candidate slots may be performed by the first UE. For example, at least one candidate resource within the Y candidate slots may be selected by the first UE based on the monitoring. For example, the SL resource may be selected by the first UE among the at least one candidate resource. For example, the at least one slot may be determined based on whether information for monitoring an additional sensing occasion is configured for the first UE.
Based on an embodiment of the present disclosure, a non-transitory computer-readable storage medium storing instructions may be provided. For example, the instructions, when executed, may cause a second device to: receive, from a first device through a physical sidelink control channel (PSCCH), first sidelink control information (SCI) for scheduling of second SCI and a physical sidelink shared channel (PSSCH), based on a sidelink (SL) resource: and receive, from the first device through the PSSCH, the second SCI and a media access control (MAC) protocol data unit (PDU), based on the SL resource. For example, Y candidate slots may be selected by the first device within a selection window determined based on a first slot in which resource selection is triggered. For example, based on at least one resource reservation period for periodic-based partial sensing (PBPS), monitoring for at least one slot related to the Y candidate slots may be performed by the first device. For example, at least one candidate resource within the Y candidate slots may be selected by the first device based on the monitoring. For example, the SL resource may be selected by the first device among the at least one candidate resource. For example, the at least one slot may be determined based on whether information for monitoring an additional sensing occasion is configured for the first device.
Various embodiments of the present disclosure may be combined with each other.
Hereinafter, device(s) to which various embodiments of the present disclosure can be applied will be described.
The various descriptions, functions, procedures, proposals, methods, and/or operational flowcharts of the present disclosure described in this document may be applied to, without being limited to, a variety of fields requiring wireless communication/connection (e.g., 5G) between devices.
Hereinafter, a description will be given in more detail with reference to the drawings. In the following drawings/description, the same reference symbols may denote the same or corresponding hardware blocks, software blocks, or functional blocks unless described otherwise.
Referring to
Here, wireless communication technology implemented in wireless devices 100a to 100f of the present disclosure may include Narrowband Internet of Things for low-power communication in addition to LTE, NR, and 6G. In this case, for example, NB-IoT technology may be an example of Low Power Wide Area Network (LPWAN) technology and may be implemented as standards such as LTE Cat NB1, and/or LTE Cat NB2, and is not limited to the name described above. Additionally or alternatively, the wireless communication technology implemented in the wireless devices 100a to 100f of the present disclosure may perform communication based on LTE-M technology. In this case, as an example, the LTE-M technology may be an example of the LPWAN and may be called by various names including enhanced Machine Type Communication (eMTC), and the like. For example, the LTE-M technology may be implemented as at least any one of various standards such as 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-Bandwidth Limited (non-BL), 5) LTE-MTC, 6) LTE Machine Type Communication, and/or 7) LTE M. and is not limited to the name described above. Additionally or alternatively, the wireless communication technology implemented in the wireless devices 100a to 100f of the present disclosure may include at least one of Bluetooth, Low Power Wide Area Network (LPWAN), and ZigBee considering the low-power communication, and is not limited to the name described above. As an example, the ZigBee technology may generate personal area networks (PAN) related to small/low-power digital communication based on various standards including IEEE 802.15.4, and the like, and may be called by various names.
The wireless devices 100a to 100f may be connected to the network 300 via the BSs 200. An AI technology may be applied to the wireless devices 100a to 100f and the wireless devices 100a to 100f may be connected to the AI server 400 via the network 300. The network 300 may be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although the wireless devices 100a to 100f may communicate with each other through the BSs 200/network 300, the wireless devices 100a to 100f may perform direct communication (e.g., sidelink communication) with each other without passing through the BSs/network. For example, the vehicles 100b-1 and 100b-2 may perform direct communication (e.g. Vehicle-to-Vehicle (V2V)/Vehicle-to-everything (V2X) communication). The IoT device (e.g., a sensor) may perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.
Wireless communication/connections 150a. 150b, or 150c may be established between the wireless devices 100a to 100f/BS 200, or BS 200/BS 200. Herein, the wireless communication/connections may be established through various RATs (e.g., 5G NR) such as uplink/downlink communication 150a, sidelink communication 150b (or, D2D communication), or inter BS communication (e.g. relay, Integrated Access Backhaul (IAB)). The wireless devices and the BSs/the wireless devices may transmit/receive radio signals to/from each other through the wireless communication/connections 150a and 150b. For example, the wireless communication/connections 150a and 150b may transmit/receive signals through various physical channels. To this end, at least a part of various configuration information configuring processes, various signal processing processes (e.g., channel encoding/decoding, modulation/demodulation, and resource mapping/demapping), and resource allocating processes, for transmitting/receiving radio signals, may be performed based on the various proposals of the present disclosure.
Referring to
The first wireless device 100 may include one or more processors 102 and one or more memories 104 and additionally further include one or more transceivers 106 and/or one or more antennas 108. The processor(s) 102 may control the memory(s) 104 and/or the transceiver(s) 106 and may be configured to implement the descriptions, functions, procedures, proposals, methods, and/or operational flowcharts disclosed in this document. For example, the processor(s) 102 may process information within the memory(s) 104 to generate first information/signals and then transmit radio signals including the first information/signals through the transceiver(s) 106. The processor(s) 102 may receive radio signals including second information/signals through the transceiver 106 and then store information obtained by processing the second information/signals in the memory(s) 104. The memory(s) 104 may be connected to the processor(s) 102 and may store a variety of information related to operations of the processor(s) 102. For example, the memory(s) 104 may store software code including commands for performing a part or the entirety of processes controlled by the processor(s) 102 or for performing the descriptions, functions, procedures, proposals, methods, and/or operational flowcharts disclosed in this document. Herein, the processor(s) 102 and the memory(s) 104 may be a part of a communication modem/circuit/chip designed to implement RAT (e.g., LTE or NR). The transceiver(s) 106 may be connected to the processor(s) 102 and transmit and/or receive radio signals through one or more antennas 108. Each of the transceiver(s) 106 may include a transmitter and/or a receiver. The transceiver(s) 106 may be interchangeably used with Radio Frequency (RF) unit(s). In the present disclosure, the wireless device may represent a communication modem/circuit/chip.
The second wireless device 200 may include one or more processors 202 and one or more memories 204 and additionally further include one or more transceivers 206 and/or one or more antennas 208. The processor(s) 202 may control the memory(s) 204 and/or the transceiver(s) 206 and may be configured to implement the descriptions, functions, procedures, proposals, methods, and/or operational flowcharts disclosed in this document. For example, the processor(s) 202 may process information within the memory(s) 204 to generate third information/signals and then transmit radio signals including the third information/signals through the transceiver(s) 206. The processor(s) 202 may receive radio signals including fourth information/signals through the transceiver(s) 106 and then store information obtained by processing the fourth information/signals in the memory(s) 204. The memory(s) 204 may be connected to the processor(s) 202 and may store a variety of information related to operations of the processor(s) 202. For example, the memory(s) 204 may store software code including commands for performing a part or the entirety of processes controlled by the processor(s) 202 or for performing the descriptions, functions, procedures, proposals, methods, and/or operational flowcharts disclosed in this document. Herein, the processor(s) 202 and the memory(s) 204 may be a part of a communication modem/circuit/chip designed to implement RAT (e.g., LTE or NR). The transceiver(s) 206 may be connected to the processor(s) 202 and transmit and/or receive radio signals through one or more antennas 208. Each of the transceiver(s) 206 may include a transmitter and/or a receiver. The transceiver(s) 206 may be interchangeably used with RF unit(s). In the present disclosure, the wireless device may represent a communication modem/circuit/chip.
Hereinafter, hardware elements of the wireless devices 100 and 200 will be described more specifically. One or more protocol layers may be implemented by, without being limited to, one or more processors 102 and 202. For example, the one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). The one or more processors 102 and 202 may generate one or more Protocol Data Units (PDUs) and/or one or more Service Data Unit (SDUs) according to the descriptions, functions, procedures, proposals, methods, and/or operational flowcharts disclosed in this document. The one or more processors 102 and 202 may generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and/or operational flowcharts disclosed in this document. The one or more processors 102 and 202 may generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and/or operational flowcharts disclosed in this document and provide the generated signals to the one or more transceivers 106 and 206. The one or more processors 102 and 202 may receive the signals (e.g., baseband signals) from the one or more transceivers 106 and 206 and acquire the PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and/or operational flowcharts disclosed in this document.
The one or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. The one or more processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof. As an example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs) may be included in the one or more processors 102 and 202. The descriptions, functions, procedures, proposals, methods, and/or operational flowcharts disclosed in this document may be implemented using firmware or software and the firmware or software may be configured to include the modules, procedures, or functions. Firmware or software configured to perform the descriptions, functions, procedures, proposals, methods, and/or operational flowcharts disclosed in this document may be included in the one or more processors 102 and 202 or stored in the one or more memories 104 and 204 so as to be driven by the one or more processors 102 and 202. The descriptions, functions, procedures, proposals, methods, and/or operational flowcharts disclosed in this document may be implemented using firmware or software in the form of code, commands, and/or a set of commands.
The one or more memories 104 and 204 may be connected to the one or more processors 102 and 202 and store various types of data, signals, messages, information, programs, code, instructions, and/or commands. The one or more memories 104 and 204 may be configured by Read-Only Memories (ROMs). Random Access Memories (RAMs), Electrically Erasable Programmable Read-Only Memories (EPROMs), flash memories, hard drives, registers, cash memories, computer-readable storage media, and/or combinations thereof. The one or more memories 104 and 204 may be located at the interior and/or exterior of the one or more processors 102 and 202. The one or more memories 104 and 204 may be connected to the one or more processors 102 and 202 through various technologies such as wired or wireless connection.
The one or more transceivers 106 and 206 may transmit user data, control information, and/or radio signals/channels, mentioned in the methods and/or operational flowcharts of this document, to one or more other devices. The one or more transceivers 106 and 206 may receive user data, control information, and/or radio signals/channels, mentioned in the descriptions, functions, procedures, proposals, methods, and/or operational flowcharts disclosed in this document, from one or more other devices. For example, the one or more transceivers 106 and 206 may be connected to the one or more processors 102 and 202 and transmit and receive radio signals. For example, the one or more processors 102 and 202 may perform control so that the one or more transceivers 106 and 206 may transmit user data, control information, or radio signals to one or more other devices. The one or more processors 102 and 202 may perform control so that the one or more transceivers 106 and 206 may receive user data, control information, or radio signals from one or more other devices. The one or more transceivers 106 and 206 may be connected to the one or more antennas 108 and 208 and the one or more transceivers 106 and 206 may be configured to transmit and receive user data, control information, and/or radio signals/channels, mentioned in the descriptions, functions, procedures, proposals, methods, and/or operational flowcharts disclosed in this document, through the one or more antennas 108 and 208. In this document, the one or more antennas may be a plurality of physical antennas or a plurality of logical antennas (e.g., antenna ports). The one or more transceivers 106 and 206 may convert received radio signals/channels etc. from RF band signals into baseband signals in order to process received user data, control information, radio signals/channels, etc. using the one or more processors 102 and 202. The one or more transceivers 106 and 206 may convert the user data, control information, radio signals/channels, etc. processed using the one or more processors 102 and 202 from the base band signals into the RF band signals. To this end, the one or more transceivers 106 and 206 may include (analog) oscillators and/or filters.
Referring to
Codewords may be converted into radio signals via the signal processing circuit 1000 of
Specifically, the codewords may be converted into scrambled bit sequences by the scramblers 1010. Scramble sequences used for scrambling may be generated based on an initialization value, and the initialization value may include ID information of a wireless device. The scrambled bit sequences may be modulated to modulation symbol sequences by the modulators 1020. A modulation scheme may include pi/2-Binary Phase Shift Keying (pi/2-BPSK), m-Phase Shift Keying (m-PSK), and m-Quadrature Amplitude Modulation (m-QAM). Complex modulation symbol sequences may be mapped to one or more transport layers by the layer mapper 1030. Modulation symbols of each transport layer may be mapped (precoded) to corresponding antenna port(s) by the precoder 1040. Outputs z of the precoder 1040 may be obtained by multiplying outputs y of the layer mapper 1030 by an N*M precoding matrix W. Herein, N is the number of antenna ports and M is the number of transport layers. The precoder 1040 may perform precoding after performing transform precoding (e.g., DFT) for complex modulation symbols. Alternatively, the precoder 1040 may perform precoding without performing transform precoding.
The resource mappers 1050 may map modulation symbols of each antenna port to time-frequency resources. The time-frequency resources may include a plurality of symbols (e.g., a CP-OFDMA symbols and DFT-s-OFDMA symbols) in the time domain and a plurality of subcarriers in the frequency domain. The signal generators 1060 may generate radio signals from the mapped modulation symbols and the generated radio signals may be transmitted to other devices through each antenna. For this purpose, the signal generators 1060 may include Inverse Fast Fourier Transform (IFFT) modules, Cyclic Prefix (CP) inserters, Digital-to-Analog Converters (DACs), and frequency up-converters.
Signal processing procedures for a signal received in the wireless device may be configured in a reverse manner of the signal processing procedures 1010 to 1060 of
Referring to
The additional components 140 may be variously configured according to types of wireless devices. For example, the additional components 140 may include at least one of a power unit/battery, input/output (I/O) unit, a driving unit, and a computing unit. The wireless device may be implemented in the form of, without being limited to, the robot (100a of
In
Hereinafter, an example of implementing
Referring to
The communication unit 110 may transmit and receive signals (e.g., data and control signals) to and from other wireless devices or BSs. The control unit 120 may perform various operations by controlling constituent elements of the hand-held device 100. The control unit 120 may include an Application Processor (AP). The memory unit 130 may store data/parameters/programs/code/commands needed to drive the hand-held device 100. The memory unit 130 may store input/output data/information. The power supply unit 140a may supply power to the hand-held device 100 and include a wired/wireless charging circuit, a battery, etc. The interface unit 140b may support connection of the hand-held device 100 to other external devices. The interface unit 140b may include various ports (e.g., an audio I/O port and a video I/O port) for connection with external devices. The I/O unit 140c may input or output video information/signals, audio information/signals, data, and/or information input by a user. The I/O unit 140c may include a camera, a microphone, a user input unit, a display unit 140d, a speaker, and/or a haptic module.
As an example, in the case of data communication, the I/O unit 140c may acquire information/signals (e.g., touch, text, voice, images, or video) input by a user and the acquired information/signals may be stored in the memory unit 130. The communication unit 110 may convert the information/signals stored in the memory into radio signals and transmit the converted radio signals to other wireless devices directly or to a BS. The communication unit 110 may receive radio signals from other wireless devices or the BS and then restore the received radio signals into original information/signals. The restored information/signals may be stored in the memory unit 130 and may be output as various types (e.g., text, voice, images, video, or haptic) through the I/O unit 140c.
Referring to
The communication unit 110 may transmit and receive signals (e.g., data and control signals) to and from external devices such as other vehicles, BSs (e.g., gNBs and road side units), and servers. The control unit 120 may perform various operations by controlling elements of the vehicle or the autonomous vehicle 100. The control unit 120 may include an Electronic Control Unit (ECU). The driving unit 140a may cause the vehicle or the autonomous vehicle 100 to drive on a road. The driving unit 140a may include an engine, a motor, a powertrain, a wheel, a brake, a steering device, etc. The power supply unit 140b may supply power to the vehicle or the autonomous vehicle 100 and include a wired/wireless charging circuit, a battery, etc. The sensor unit 140c may acquire a vehicle state, ambient environment information, user information, etc. The sensor unit 140c may include an Inertial Measurement Unit (IMU) sensor, a collision sensor, a wheel sensor, a speed sensor, a slope sensor, a weight sensor, a heading sensor, a position module, a vehicle forward/backward sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, an illumination sensor, a pedal position sensor, etc. The autonomous driving unit 140d may implement technology for maintaining a lane on which a vehicle is driving, technology for automatically adjusting speed, such as adaptive cruise control, technology for autonomously driving along a determined path, technology for driving by automatically setting a path if a destination is set, and the like.
For example, the communication unit 110 may receive map data, traffic information data, etc. from an external server. The autonomous driving unit 140d may generate an autonomous driving path and a driving plan from the obtained data. The control unit 120 may control the driving unit 140a such that the vehicle or the autonomous vehicle 100 may move along the autonomous driving path according to the driving plan (e.g., speed/direction control). In the middle of autonomous driving, the communication unit 110 may aperiodically/periodically acquire recent traffic information data from the external server and acquire surrounding traffic information data from neighboring vehicles. In the middle of autonomous driving, the sensor unit 140c may obtain a vehicle state and/or surrounding environment information. The autonomous driving unit 140d may update the autonomous driving path and the driving plan based on the newly obtained data/information. The communication unit 110 may transfer information about a vehicle position, the autonomous driving path, and/or the driving plan to the external server. The external server may predict traffic information data using AI technology, etc., based on the information collected from vehicles or autonomous vehicles and provide the predicted traffic information data to the vehicles or the autonomous vehicles.
Claims in the present description can be combined in a various way. For instance, technical features in method claims of the present description can be combined to be implemented or performed in an apparatus, and technical features in apparatus claims can be combined to be implemented or performed in a method. Further, technical features in method claim(s) and apparatus claim(s) can be combined to be implemented or performed in an apparatus. Further, technical features in method claim(s) and apparatus claim(s) can be combined to be implemented or performed in a method.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2021-0102174 | Aug 2021 | KR | national |
| 10-2021-0123458 | Sep 2021 | KR | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/KR2022/007469 | 5/26/2022 | WO |
| Number | Date | Country | |
|---|---|---|---|
| 63193588 | May 2021 | US |
