Patent Application
20250056501
This disclosure relates to a wireless communication system.
5G NR is a successive technology of long term evolution (LTE) 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 1GHz to 10 GHz, high frequency (millimeter waves) of 24 GHz or more, and so on.
The 6G (wireless communication) system is aimed at (i) very high data rates per device, (ii) a very large number of connected devices, (iii) global connectivity, (iv) very low latency, (v) lower energy consumption for battery-free IoT devices, (vi) ultra-reliable connectivity, and (vii) connected intelligence with machine learning capabilities. The vision of the 6G system can have four aspects: intelligent connectivity, deep connectivity, holographic connectivity, and ubiquitous connectivity, and the 6G system can satisfy the requirements as shown in Table 1 below. In other words, Table 1 is an example of the requirements of a 6G system.
In one embodiment, provided is a method for performing wireless communication by a first device. The method may comprise: obtaining configuration information related to a plurality of carriers; performing a channel busy ratio (CBR) measurement for a first resource pool included in a first carrier among the plurality of carriers; selecting the first carrier based on a CBR measurement value related to the first resource pool being less than a threshold; and determining the first resource pool for the CBR measurement as a resource pool for creation of a sidelink (SL) grant, based on the selection of the first carrier.
In one embodiment, provided is a first device configured to perform wireless communication. The first device may comprise: at least one transceiver; at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, the instructions, based on being executed by the at least one processor, cause the first device to perform operations comprising: obtaining configuration information related to a plurality of carriers; performing a channel busy ratio (CBR) measurement for a first resource pool included in a first carrier among the plurality of carriers; selecting the first carrier based on a CBR measurement value related to the first resource pool being less than a threshold; and determining the first resource pool for the CBR measurement as a resource pool for creation of a sidelink (SL) grant, based on the selection of the first carrier.
In one embodiment, provided is a processing device configured to control a first device. The processing device may comprise: at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, the instructions, based on being executed by the at least one processor, cause the first device to perform operations comprising: obtaining configuration information related to a plurality of carriers; performing a channel busy ratio (CBR) measurement for a first resource pool included in a first carrier among the plurality of carriers; selecting the first carrier based on a CBR measurement value related to the first resource pool being less than a threshold; and determining the first resource pool for the CBR measurement as a resource pool for creation of a sidelink (SL) grant, based on the selection of the first carrier.
In one embodiment, provided is a non-transitory computer-readable storage medium recording instructions. For example, the instructions, based on being executed, cause a first device to perform operations comprising: obtaining configuration information related to a plurality of carriers; performing a channel busy ratio (CBR) measurement for a first resource pool included in a first carrier among the plurality of carriers; selecting the first carrier based on a CBR measurement value related to the first resource pool being less than a threshold; and determining the first resource pool for the CBR measurement as a resource pool for creation of a sidelink (SL) grant, based on the selection of the first carrier.
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.
In the present disclosure, “configured or defined” may be interpreted as being configured or pre-configured to a device through pre-defined signaling (e.g., SIB, MAC, RRC) from a base station or network. In the present disclosure, “configured or defined” may be interpreted as being pre-configured to a device.
The technology proposed in the present disclosure 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), long term evolution (LTE), 5G NR, and so on.
The technology proposed in the present disclosure may be implemented as 6G wireless technology and may be applied to various 6G systems. For example, 6G systems may have key factors such as enhanced mobile broadband (eMBB), ultra-reliable low latency communications (URLLC), massive machine-type communication (mMTC), artificial intelligence (AI) unified communications, tactile internet, high throughput, high network capacity, high energy efficiency, low backhaul and access network congestion, and enhanced data security.
New network characteristics in 6G may include:
In the above new network characteristics of 6G, some general requirements may be as follows.
The following describes the key enabling technologies for 6G systems.
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.
The physical layer provides an upper layer with an information transfer service through a physical channel. The physical layer is connected to a medium access control (MAC) layer which is an upper layer of the physical layer through a transport channel. Data is transferred between the MAC layer and the physical layer through the transport channel. The transport channel is classified according to how and with what characteristics data is transmitted through a radio interface.
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.
A radio frame may be used for performing uplink and downlink transmission. A radio frame has a length of 10 ms and may be defined to be configured of two half-frames (HFs). A half-frame may include five 1 ms subframes (SFs). A subframe (SF) may be divided into one or more slots, and the number of slots within a subframe may be determined based on subcarrier spacing (SCS). Each slot may include 12 or 14 OFDM (A) symbols according to a cyclic prefix (CP).
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 2 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 or extended CP is used.
Referring to
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.
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.
A sidelink synchronization signal (SLSS) may include a primary sidelink synchronization signal (PSSS) and a secondary sidelink synchronization signal (SSSS), as a sidelink (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.
In the present disclosure, PSCCH may be replaced with a control channel, a physical control channel, a control channel related to the sidelink, a physical control channel related to the sidelink, etc. In the present disclosure, PSSCH may be replaced with a shared channel, a physical shared channel, a shared channel related to a sidelink, a physical shared channel related to a sidelink, etc.
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 S810, 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 S820, 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 S830, 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 S840, 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.
Referring to (b) of
Referring to (a) or (b) of
Referring to (a) or (b) of
Referring to (a) of
Meanwhile, in conventional LTE V2X, the UE that supports multi-channel operation (e.g., multi-carrier operation or carrier aggregation (CA)) may select specific carrier for transmitting sidelink data, and may transmit sidelink data through the selected resource and the selected carrier by selecting a resource available in the selected carrier.
Meanwhile, according to the prior art, a UE may perform carrier selection based on channel busy ratio (CBR) measurement for the resource pool. However, when a plurality of resource pools is configured in the selected carrier, if a method for determining/selecting a resource pool for creating a grant among the plurality of resource pools is not defined, the following problems may occur. For example, although the carrier was selected based on CBR measurement for the resource pool, CBR measurement may need to be performed for each of the plurality of resource pools to determine/select a resource pool for creating grant among the plurality of resource pools included in the selected carrier. In this case, for example, as the UE performs CBR measurement again for each of the plurality of resource pools, the overhead of the UE may increase. Or, for example, as the UE performs CBR measurement again for a resource pool that has determined to be lower than a threshold by already performing CBR measurement, delay may occur in transmission of the UE, which may reduce the reliability of the service provided by the UE, or unnecessary power consumption of the UE may increase.
In the present disclosure, a method for (re)selecting a carrier or resource of supporting multi-carrier operation and a device supporting the same are proposed as follows.
For example, transmission (TX) carrier (re)selection procedure for NR sidelink communication may be as follows.
For example, the MAC entity may consider a CBR of a carrier to be one measured by lower layers according to technical specification (TS) 38.214 if CBR measurement results are available, or the corresponding sl-defaultTxConfigIndex configured by upper layers for the carrier if CBR measurement results are not available.
For example, if the TX carrier (re)selection is triggered for a sidelink process according to clause 5.22.1.1 of TS 38.321, the MAC entity may perform as follows.
For example, the MAC entity may perform the following operations.
For example, for reference, it is left to UE implementation how many carriers to select based on UE capability.
For example, for reference, it is left to UE implementation to determine the sidelink logical channels among the sidelink logical channels where data is available and that are allowed on the carrier for which Tx carrier (re) selection is triggered.
For example, the UE supporting multi-carrier operation may perform the following carrier selection operation and resource pool selection operation to create a grant.
For example, the UE may select or determine candidate carrier(s) to be used for sidelink data transmission by considering HARQ feedback properties (e.g., HARQ feedback enabled or HARQ feedback disabled) of its sidelink data (e.g., logical channel data or MAC CE or PC5 RRC message or PC5-S message, etc.). For example, the UE may consider a carrier including a resource pool configured with PSFCH as candidate carrier to be used for transmission of sidelink data which HARQ feedback properties is HARQ feedback enabled. Or, for example, the UE may consider a carrier including a resource pool configured with PSFCH or a resource pool not configured with PSFCH as candidate carrier to be used for transmission of sidelnik data which HARQ feedback properties is HARQ feedback disabled. For example, the UE may select a resource pool for channel busy ratio (CBR) measurement among the plurality of resource pools included in the candidate carrier(s) selected considering HARQ feedback properties. And, for example, if the CBR measurement value is less than sl-threshCBR-FreqReselection by measuring CBR in the selected resource pool (e.g., if CBR of the carrier is less than sl-threshCBR-FreqReselection related to priority of sidelink logical channel), the corresponding carrier may be determined as a final candidate carrier to be used. For example, if the UE selects a plurality of final candidate carriers, a carrier to be used for sidelink data transmission may be determined with increasing order (or decreasing order) based on the carrier with the lowest CBR measurement value (or, the carrier including resource pool with lowest CBR measurement value). And, for example, if determining a carrier (e.g., a carrier that satisfies threshold condition of CBR measurement value) to be used, the UE may determine a resource pool selected for CBR measurement in the corresponding carrier as a resource pool for sidelink grant creation and may create the sidelink grant based on this resource pool. Or, for example, if determining a carrier (e.g., a carrier that satisfies threshold condition of CBR measurement value) to be used, the UE may select a resource pool for sidelink grant creation among resource pool(s) included in the corresponding carrier. In this case, for example, the UE may determine a resource pool with the lowest CBR measurement value as a resource pool for sidelink grant creation by measuring CBR for the resource pool. For example, if CBR measurement value satisfies CBR threshold condition (e.g., CBR of carrier is lower than sl-threshCBR-FreqReselection related to priority of sidelink logical channel) in carrier selection procedure/step but the CBR measurement value of resource pool(s) included in the carrier does not satisfy the CBR threshold condition (e.g., CBR of carrier is lower than sl-threshCBR-FreqReselection related to priority of sidelink logical channel) when the CBR is measured again to select a resource pool after selecting a carrier (e.g., the CBR measurements for all resource pools that satisfy the HARQ properties of sidelink data included in the carrier do not satisfy the CBR threshold condition) because of CBR variation, carrier selection procedure may be performed again by triggering carrier (re)selection procedure. For example, this carrier (re)selection procedure may be performed continuously until a carrier is found that satisfies the CBR threshold condition (e.g., CBR of carrier is lower than sl-threshCBR-FreqReselection related to priority of sidelink logical channel).
For example, the above rule may be applied limited to sidelink grants related to aperiodic resource reservation.
Referring to
Referring to
The expression of multi-carrier exemplified in this disclosure may be extended and interpreted as carrier aggregation (CA).
The CBR threshold value related to the SL carrier/SL BWP/SL HARQ entity exemplified in the present disclosure may be configured per priority or per QoS profile (e.g., packet delay budget (PDB) or reliability) or per SL radio bearer or per logical channel.
The expression of the SL carrier exemplified in the present disclosure may be expanded and interpreted as sidelink BWP or sidelink HARQ entity.
The unicast service exemplified in the present disclosure may be interpreted as a pair of source layer-2 ID and destination layer-2 ID.
The groupcast service exemplified in the present disclosure may be interpreted as a groupcast destination layer-2 ID.
The broadcast service exemplified in the present disclosure may be interpreted as a broadcast destination layer-2 ID.
The “carrier” specified in the present disclosure may be applied as being replaced with “band” or “resource block set of a specific carrier” or “resource pool set of a specific carrier” or “channel”.
For example, whether or not the (some) proposed method/rule of the present disclosure is applied and/or related parameter(s) (e.g., threshold value(s)) may be configured (differently or independently) for each SL-Channel Access Priority Class (CAPC). For example, whether or not the (some) proposed method/rule of the present disclosure is applied and/or related parameter(s) (e.g., threshold value(s)) may be configured (differently or independently) for each SL-LBT type (e.g., Type 1 LBT, Type 2A LBT, Type 2B LBT, Type 2C LBT). For example, whether or not the (some) proposed method/rule of the present disclosure is applied and/or related parameter(s) (e.g., threshold value(s)) may be configured specifically (or differently or independently) depending on whether or not Frame Based LBT is applied. For example, whether or not the (some) proposed method/rule of the present disclosure is applied and/or related parameter(s) (e.g., threshold value(s)) may be configured specifically (or differently or independently) depending on whether or not Load Based LBT is applied.
For example, whether or not the (some) proposed method/rule of the present disclosure is applied and/or related parameter(s) (e.g., threshold value(s)) may be configured (differently or independently) for each resource pool. For example, whether or not the (some) proposed method/rule of the present disclosure is applied and/or related parameter(s) (e.g., threshold value(s)) may be configured (differently or independently) for each congestion level. For example, whether or not the (some) proposed method/rule of the present disclosure is applied and/or related parameter(s) (e.g., threshold value(s)) may be configured (differently or independently) for each service priority. For example, whether or not the (some) proposed method/rule of the present disclosure is applied and/or related parameter(s) (e.g., threshold value(s)) may be configured (differently or independently) for each service type. For example, whether or not the (some) proposed method/rule of the present disclosure is applied and/or related parameter(s) (e.g., threshold value(s)) may be configured (differently or independently) for each QoS requirement (e.g., latency, reliability). For example, whether or not the (some) proposed method/rule of the present disclosure is applied and/or related parameter(s) (e.g., threshold value(s)) may be configured (differently or independently) for each PQI (5G QoS identifier (5QI) for PC5). For example, whether or not the (some) proposed method/rule of the present disclosure is applied and/or related parameter(s) (e.g., threshold value(s)) may be configured (differently or independently) for each traffic type (e.g., periodic generation or aperiodic generation). For example, whether or not the (some) proposed method/rule of the present disclosure is applied and/or related parameter(s) (e.g., threshold value(s)) may be configured (differently or independently) for each SL transmission resource allocation mode (e.g., mode 1 or mode 2). For example, whether or not the (some) proposed method/rule of the present disclosure is applied and/or related parameter(s) (e.g., threshold value(s)) may be configured (differently or independently) for each Tx profile (e.g., a Tx profile indicating that a service supports sidelink DRX operation or a Tx profile indicating that a service does not need to support sidelink DRX operation).
For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured (differently or independently) depending on the activation/deactivation of the Uu Bandwidth part. For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured (differently or independently) depending on whether the Sidelink Bandwidth part is activated or deactivated. For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured (differently or independently) for a sidelink logical channel/logical channel group (or Uu logical channel or Uu logical channel group). For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured (differently or independently) of the initial transmission resource selection. For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured (differently or independently) of the retransmission resource selection. For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured (differently or independently) depending on whether the PUCCH configuration is supported (e.g., in case that a PUCCH resource is configured or in case that a PUCCH resource is not configured). For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured (differently or independently) for each resource pool (e.g., a resource pool with a PSFCH or a resource pool without a PSFCH). For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured (differently or independently) for each service/packet type. For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured (differently or independently) for each service/packet priority. For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured (differently or independently) for each QoS requirement (e.g., URLLC/EMBB traffic, reliability, latency). For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured (differently or independently) for each PQI. For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured (differently or independently) for each PFI. For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured (differently or independently) for each cast type (e.g., unicast, groupcast, broadcast). For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured (differently or independently) for each (resource pool) congestion level (e.g., CBR). For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured (differently or independently) for each SL HARQ feedback option (e.g., NACK-only feedback, ACK/NACK feedback). For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured specifically (or differently or independently) for HARQ Feedback Enabled MAC PDU transmission. For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured specifically (or differently or independently) for HARQ Feedback Disabled MAC PDU transmission. For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured specifically (or differently or independently) according to whether a PUCCH-based SL HARQ feedback reporting operation is configured or not. For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured specifically (or differently or independently) for pre-emption or depending on whether or not pre-emption-based resource reselection is performed. For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured specifically (or differently or independently) for re-evaluation or depending on whether or not re-evaluation-based resource reselection is performed. For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured (differently or independently) for each (L2 or L1) (source and/or destination) identifier. For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured (differently or independently) for each (L2 or L1) (a combination of source ID and destination ID) identifier. For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured (differently or independently) for each (L2 or L1) (a combination of a pair of source ID and destination ID and a cast type) identifier. For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured (differently or independently) for each direction of a pair of source layer ID and destination layer ID. For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured (differently or independently) for each PC5 RRC connection/link. For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured specifically (or differently or independently) depending on whether or not SL DRX is performed. For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured specifically (or differently or independently) depending on whether or not SL DRX is supported. For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured (differently or independently) for each SL mode type (e.g., resource allocation mode 1 or resource allocation mode 2). For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured specifically (or differently or independently) for the case of performing (a)periodic resource reservation. For example, whether or not the proposed rule of the present disclosure is applied and/or related parameter configuration value(s) may be configured specifically (or differently or independently) for each Tx profile (e.g., a Tx profile indicating that a service supports sidelink DRX operation or a Tx profile indicating that a service does not need to support sidelink DRX operation).
The proposal and whether or not the proposal rule of the present disclosure is applied (and/or related parameter configuration value(s)) may also be applied to a mmWave SL operation.
According to various embodiments of the present disclosure, when a UE selects a carrier based on CBR measurement for resource pools included in the carrier in carrier selection procedure, the UE may reuse a resource pool on which the CBR measurement was performed as a resource pool for creation of a grant. In this case, for example, when the UE creates the grant to perform transmission based on the selected carrier, since the procedure related to CBR measurement for the resource pool can be skipped, the overhead of the UE may be reduced. That is, for example, if the UE determines a resource pool related to CBR measurement value less than CBR threshold by performing CBR measurement for the resource pool in carrier selection and reuse the corresponding resource pool as a resource pool for creating a grant, the overhead of the UE may be reduced and the power of the UE may be used effectively because CBR measurement for other resource pools included in the carrier may not be performed. Or, for example, since the UE can create a grant for transmission based on a resource pool for which CBR is guaranteed, the quality related to the transmission performed based on the selected carrier may be guaranteed using the created grant.
Referring to
For example, the first resource pool for the CBR measurement may be reused as the resource pool for the creation of the SL grant.
For example, the first resource pool among a plurality of resource pools included in the first carrier may be determined as a resource pool for the CBR measurement, based on whether hybrid automatic repeat request (HARQ) feedback for a logical channel related to the first carrier is enabled or disabled.
For example, a resource pool configured with physical sidelink feedback channel (PSFCH) resource among a plurality of resource pools included in the first carrier may be selected as the first resource pool, based on HARQ feedback for a logical channel related to the first carrier being enabled.
For example, a resource pool not configured with PSFCH resource among a plurality of resource pools included in the first carrier may be selected as the first resource pool, based on HARQ feedback for a logical channel related to the first carrier being disabled.
For example, the first carrier may be selected based on the CBR measurement value related to the first resource pool included in the first carrier being the lowest CBR measurement value among CBR measurement values measured for each of at least one resource pool included in each of the plurality of carriers.
For example, the first carrier and a second carrier may be selected based on selecting one or more carriers including a resource pool related to a CBR measurement value with increasing order from the lowest CBR measurement value among CBR measurement values measured for each of at least one resource pool included in each of the plurality of carriers. For example, a carrier re-selection may be triggered, based on a CBR measurement value measured for each of at least one resource pool included in the second carrier being greater than the threshold when determining the resource pool for the creation of the SL grant. For example, the first resource pool included in the first carrier excluding the second carrier may be determined as the resource pool for the creation of the SL grant, based on a CBR measurement value measured for each of at least one resource pool included in the second carrier being greater than the threshold after the first carrier and the second carrier are selected.
For example, the first resource pool for the CBR measurement may be determined as the resource pool for the creation of the SL grant, based on the SL grant being related to an aperiodic resource reservation.
For example, at least one of logical channel data, a medium access control (MAC) control element (CE), a PC5-radio resource control (RRC) message or a PC5-S message may be transmitted to a second device through the first carrier based on the SL grant.
For example, a higher layer of the first device may determine the CBR measurement value related to the first resource pool among a plurality of resource pools included in the first carrier as a CBR measurement value of the first carrier, based on the CBR measurement for the first resource pool being performed on a lower layer of the first device and the CBR measurement value related to the first resource pool being available. For example, the lower layer of the first device may be a physical (PHY) layer of the first device. And, for example, the higher layer of the first device may be a medium access control (MAC) layer of the first device.
The proposed method may be applied to devices according to various embodiments of the present disclosure. First, a processor 102 of a first device 100 may control a transceiver 106 to obtain configuration information related to a plurality of carriers. And, the processor 102 of the first device 100 may perform a channel busy ratio (CBR) measurement for a first resource pool included in a first carrier among the plurality of carriers. And, the processor 102 of the first device 100 may select the first carrier based on a CBR measurement value related to the first resource pool being less than a threshold. And, the processor 102 of the first device 100 may determine the first resource pool for the CBR measurement as a resource pool for creation of a sidelink (SL) grant, based on the selection of the first carrier.
According to one embodiment of the present disclosure, provided is a first device configured to perform wireless communication. The first device may comprise: at least one transceiver; at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, the instructions, based on being executed by the at least one processor, cause the first device to perform operations comprising: obtaining configuration information related to a plurality of carriers; performing a channel busy ratio (CBR) measurement for a first resource pool included in a first carrier among the plurality of carriers; selecting the first carrier based on a CBR measurement value related to the first resource pool being less than a threshold; and determining the first resource pool for the CBR measurement as a resource pool for creation of a sidelink (SL) grant, based on the selection of the first carrier.
According to one embodiment of the present disclosure, provided is a processing device configured to control a first device. The processing device may comprise: at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, the instructions, based on being executed by the at least one processor, cause the first device to perform operations comprising: obtaining configuration information related to a plurality of carriers; performing a channel busy ratio (CBR) measurement for a first resource pool included in a first carrier among the plurality of carriers; selecting the first carrier based on a CBR measurement value related to the first resource pool being less than a threshold; and determining the first resource pool for the CBR measurement as a resource pool for creation of a sidelink (SL) grant, based on the selection of the first carrier.
According to one embodiment of the present disclosure, provided is a non-transitory computer-readable storage medium recording instructions. For example, the instructions, based on being executed, cause a first device to perform operations comprising: obtaining configuration information related to a plurality of carriers; performing a channel busy ratio (CBR) measurement for a first resource pool included in a first carrier among the plurality of carriers; selecting the first carrier based on a CBR measurement value related to the first resource pool being less than a threshold; and determining the first resource pool for the CBR measurement as a resource pool for creation of a sidelink (SL) grant, based on the selection of the first carrier.
Referring to
The proposed method may be applied to devices according to various embodiments of the present disclosure. First, a processor 202 of a second device 200 may control a transceiver 206 to obtain configuration information related to a plurality of carriers. And, the processor 202 of the second device 200 may receive, from a first device, at least one of control information or data based on a first carrier among the plurality of carriers. For example, the first carrier may be a carrier selected based on a channel busy ratio (CBR) measurement value related to a first resource pool included in the first carrier among the plurality of carriers being less than a threshold. And, for example, a sidelink (SL) grant related to the reception of the at least one of the control information or the data may be a SL grant created based on the first resource pool for CBR measurement being determined as a resource pool for creation of the SL grant.
According to one embodiment of the present disclosure, provided is a second device configured to perform wireless communication. The second device may comprise: at least one transceiver; at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, the instructions, based on being executed by the at least one processor, cause the second device to perform operations comprising: obtaining configuration information related to a plurality of carriers; and receiving, from a first device, at least one of control information or data based on a first carrier among the plurality of carriers. For example, the first carrier may be a carrier selected based on a channel busy ratio (CBR) measurement value related to a first resource pool included in the first carrier among the plurality of carriers being less than a threshold. And, for example, a sidelink (SL) grant related to the reception of the at least one of the control information or the data may be a SL grant created based on the first resource pool for CBR measurement being determined as a resource pool for creation of the SL grant.
According to one embodiment of the present disclosure, provided is a processing device configured to control a second device. The processing device may comprise: at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, the instructions, based on being executed by the at least one processor, cause the second device to perform operations comprising: obtaining configuration information related to a plurality of carriers; and receiving, from a first device, at least one of control information or data based on a first carrier among the plurality of carriers. For example, the first carrier may be a carrier selected based on a channel busy ratio (CBR) measurement value related to a first resource pool included in the first carrier among the plurality of carriers being less than a threshold. And, for example, a sidelink (SL) grant related to the reception of the at least one of the control information or the data may be a SL grant created based on the first resource pool for CBR measurement being determined as a resource pool for creation of the SL grant.
According to one embodiment of the present disclosure, provided is a non-transitory computer-readable storage medium recording instructions. For example, the instructions, based on being executed, cause a second device to perform operations comprising: obtaining configuration information related to a plurality of carriers; and receiving, from a first device, at least one of control information or data based on a first carrier among the plurality of carriers. For example, the first carrier may be a carrier selected based on a channel busy ratio (CBR) measurement value related to a first resource pool included in the first carrier among the plurality of carriers being less than a threshold. And, for example, a sidelink (SL) grant related to the reception of the at least one of the control information or the data may be a SL grant created based on the first resource pool for CBR measurement being determined as a resource pool for creation of the SL grant.
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 |
|---|---|---|---|
| 10-2023-0155447 | Nov 2023 | KR | national |
This application claims the benefit of U.S. Provisional Application No. 63/531,800, filed on Aug. 9, 2023, U.S. Provisional Application No. 63/531,802, filed on Aug. 9, 2023, and Korean Patent Application No. 10-2023-0155447, filed on Nov. 10, 2023, the contents of which are all hereby incorporated by reference herein in their entirety.
| Number | Date | Country | |
|---|---|---|---|
| 63531800 | Aug 2023 | US | |
| 63531802 | Aug 2023 | US |
