Patent Application
20240015840
This disclosure relates to the field of communication technologies.
In Release 17 of existing standards, enhancement to the New Radio (NR) sidelink is power saving, which enables a terminal equipment with battery limitations to perform sidelink operations in a power efficient manner. A design of NR sidelink of Release 16 in the existing standards is based on an assumption that a terminal equipment is always online during sidelink operations, such as focusing only on a terminal equipment installed in a vehicle with a sufficient battery capacity. In Release 17, a power saving solution is required for vulnerable road users (VRUs), pedestrian users in all Vehicle to Everything (V2X) application scenarios and terminal equipments that require minimal power consumption in public safety and commercial scenarios.
In existing standards, in order to save power, downlink discontinuous reception (DRX) may be configured for a terminal equipment. When DRX is configured for the terminal equipment, it does not need to continuously monitor a physical downlink control channel (PDCCH).
It should be noted that the above description of the background is merely provided for clear and complete explanation of this disclosure and for easy understanding by those skilled in the art. And it should not be understood that the above technical solution is known to those skilled in the art as it is described in the background of this disclosure.
It was found by the inventors that for sidelink DRX (SL DRX), the radio access network second group (RAN2) of the Third Generation Partner Program (3GPP) has agreed to introduce a sidelink discontinuous reception (SL DRX) command MAC CE for SL DRX operations in unicast. However, after the introduction of the SL DRX command MAC CE, there exists the following problems:
Addressed to at least one of the above problems, embodiments of this disclosure provide a method and apparatus for triggering a sidelink discontinuous reception command and a system.
According to an aspect of the embodiments of this disclosure, there is provided an apparatus for triggering a sidelink discontinuous reception (SL DRX) command, configured in a first terminal equipment, the first terminal equipment performing sidelink transmission to a second terminal equipment, and the second terminal equipment using sidelink discontinuous reception (SL DRX), wherein the apparatus includes:
According to another aspect of the embodiments of this disclosure, there is provided an apparatus for triggering a scheduling request to which a sidelink discontinuous reception command corresponds, configured in a first terminal equipment, the first terminal equipment performing sidelink transmission to a second terminal equipment, the second terminal equipment using sidelink discontinuous reception (SL DRX), wherein the apparatus includes:
According to a further aspect of the embodiments of this disclosure, there is provided an apparatus for selecting a resource pool, configured in a first terminal equipment, the first terminal equipment performing sidelink transmission to a second terminal equipment, and the second terminal equipment using sidelink discontinuous reception (SL DRX), wherein the apparatus includes:
According to still another aspect of the embodiments of this disclosure, there is provided an apparatus for selecting a logical channel, configured in a first terminal equipment, the first terminal equipment performing sidelink transmission to a second terminal equipment, and the second terminal equipment using sidelink discontinuous reception (SL DRX), wherein the apparatus includes:
According to yet another aspect of the embodiments of this disclosure, there is provided an apparatus for selecting a logical channel, configured in a first terminal equipment, the first terminal equipment performing sidelink transmission to a second terminal equipment, and the second terminal equipment using sidelink discontinuous reception (SL DRX), wherein the apparatus includes:
According to yet still another aspect of the embodiments of this disclosure, there is provided an apparatus for transmitting sidelink transmission, configured in a first terminal equipment, the first terminal equipment performing sidelink transmission to a second terminal equipment, and the second terminal equipment using sidelink discontinuous reception (SL DRX), wherein the apparatus includes:
An advantage of the embodiments of this disclosure exists in that according to the embodiments of this disclosure, the SL DRX command MAC CE may be triggered at a correct time so as to save power consumption of a receiving equipment; and on the other hand, the resource pool is selected and the LCP procedure is performed according to the HARQ attribute of the SL DRX command MAC CE, thereby ensuring reliability of transmission of the SL DRX command MAC CE. Furthermore, the network device may be timely notified to allocate sidelink resources or stop allocating sidelink resources, thereby reducing transmission delay of the SL DRX command MAC CE or avoiding waste of sidelink resources.
With reference to the following description and drawings, the particular embodiments of this disclosure are disclosed in detail, and the principle of this disclosure and the manners of use are indicated. It should be understood that the scope of the embodiments of this disclosure is not limited thereto. The embodiments of this disclosure contain many alternations, modifications and equivalents within the scope of the terms of the appended claims.
Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments and/or in combination with or instead of the features of the other embodiments.
It should be emphasized that the term “comprises/comprising/includes/including” when used in this specification is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps, components or groups thereof.
Elements and features depicted in one drawing or embodiment of the disclosure may be combined with elements and features depicted in one or more additional drawings or embodiments. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views and may be used to designate like or similar parts in more than one embodiment.
These and further aspects and features of this disclosure will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the disclosure have been disclosed in detail as being indicative of some of the ways in which the principles of the disclosure may be employed, but it is understood that the disclosure is not limited correspondingly in scope. Rather, the disclosure includes all changes, modifications and equivalents coming within the terms of the appended claims.
In the embodiments of this disclosure, terms “first”, and “second”, etc., are used to differentiate different elements with respect to names, and do not indicate spatial arrangement or temporal orders of these elements, and these elements should not be limited by these terms. Terms “and/or” include any one and all combinations of one or more relevantly listed terms. Terms “contain”, “include” and “have” refer to existence of stated features, elements, components, or assemblies, but do not exclude existence or addition of one or more other features, elements, components, or assemblies.
In the embodiments of this disclosure, single forms “a”, and “the”, etc., include plural forms, and should be understood as “a kind of” or “a type of” in a broad sense, but should not defined as a meaning of “one”; and the term “the” should be understood as including both a single form and a plural form, except specified otherwise. Furthermore, the term “according to” should be understood as “at least partially according to”, the term “based on” should be understood as “at least partially based on”, except specified otherwise.
In the embodiments of this disclosure, the term “communication network” or “wireless communication network” may refer to a network satisfying any one of the following communication standards: long term evolution (LTE), long term evolution-advanced (LTE-A), wideband code division multiple access (WCDMA), and high-speed packet access (HSPA), etc.
And communication between devices in a communication system may be performed according to communication protocols at any stage, which may, for example, include but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, and 5G and New Radio (NR) in the future, etc., and/or other communication protocols that are currently known or will be developed in the future.
In the embodiments of this disclosure, the term “network device”, for example, refers to a device in a communication system that accesses a user equipment to the communication network and provides services for the user equipment. The network device may include but not limited to the following devices: a node and/or donor in an IAB architecture, a base station (BS), an access point (AP), a transmission reception point (TRP), a broadcast transmitter, a mobile management entity (MME), a gateway, a server, a radio network controller (RNC), a base station controller (BSC), etc.
In the embodiments, the base station may include but not limited to a node B (NodeB or NB), an evolved node B (eNodeB or eNB), and a 5G base station (gNB), etc. Furthermore, it may include a remote radio head (RRH), a remote radio unit (RRU), a relay, or a low-power node (such as a femto, and a pico, etc.). The term “base station” may include some or all of its functions, and each base station may provide communication coverage for a specific geographical area. And a term “cell” may refer to a base station and/or its coverage area, depending on a context of the term.
In the embodiments of this disclosure, the term “user equipment (UE)” or “terminal equipment (TE) or terminal device” refers to, for example, an equipment accessing to a communication network and receiving network services via a network device. The terminal equipment may be fixed or mobile, and may also be referred to as a mobile station (MS), a terminal, a subscriber station (SS), an access terminal (AT), and a station, etc.
In the embodiments, the terminal equipment may include but not limited to the following devices: a cellular phone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a hand-held device, a machine-type communication device, a lap-top, a cordless telephone, a smart cell phone, a smart watch, and a digital camera, etc.
For another example, in a scenario of the Internet of Things (IoT), etc., the user equipment may also be a machine or a device performing monitoring or measurement. For example, it may include but not limited to a machine-type communication (MTC) terminal, a vehicle mounted communication terminal, a device to device (D2D) terminal, and a machine to machine (M2M) terminal, etc.
Moreover, the term “network side” or “network device side” refers to a side of a network, which may be a base station or one or more network devices including those described above. The term “user side” or “terminal side” or “terminal equipment side” refers to a side of a user or a terminal, which may be a UE, and may include one or more terminal equipments described above. In this text, “device” may refer to a network device, and may also refer to a terminal equipment, except otherwise specified.
In the embodiments of this disclosure, an active time of SL DRX refers to a total time monitoring SCI (such as monitoring a PSCCH and monitoring second stage SCI in a PSSCH) by a terminal equipment, including an on-duration of an SL DRX cycle, a time of performing continuous reception by the terminal equipment when the inactivity timer does not expire, and a time of performing continuous reception by the terminal equipment while waiting for a retransmission opportunity.
In the embodiment of this disclosure, DRX configuration may further include a retransmission timer, which specifies an time duration of expecting that there will exist retransmission.
For SL DRX, as shown in
In the embodiment of this disclosure, description is given by taking that a first terminal equipment perform sidelink transmission to a second terminal equipment as an example. And the second terminal equipment uses SL DRX, or the second terminal equipment is configured with SL DRX, or the second terminal equipment performs SL DRX operations, and so on. Here, the SL DRX configuration may be configured by a network device for the second terminal equipment, or may be preconfigured for the second terminal equipment, or may be configured by the first terminal equipment for the second terminal equipment via a sidelink (such as by using an RRC configuration sidelink message, etc.). Here, the sidelink transmission may include transmission of sidelink data or control information or feedback information or reference signals. And furthermore, from the perspective of sidelink transmission, in the embodiments of this disclosure, the first terminal equipment is a transmitting equipment (Tx UE), and the second terminal equipment is a receiving equipment (Rx UE).
The embodiments of this disclosure shall be described below with reference to the accompanying drawings and specific implementations.
The embodiment of this disclosure provides a method for triggering a sidelink discontinuous reception command, which shall be described from a side of a first terminal equipment.
In the embodiment of this disclosure, when one of the above first conditions is satisfied, a sidelink discontinuous reception command is triggered. Therefore, the sidelink discontinuous reception command may be triggered or canceled at a correct moment, which may save power consumption of a receiving equipment (Rx UE) or prevent delay of data transmission from increasing.
In some embodiments, that a logical channel to which a destination or a pair of source ID and destination ID or a PQI has no data to be transmitted refers to that a buffer size of the logical channel to which a destination or a pair of source ID and destination ID or a PQI corresponds is 0. However, this disclosure is not limited thereto, and that the logical channel has no data to be transmitted may also be expressed otherwise.
In some embodiments, the current service period in the above first conditions includes at least one of the following: a cycle of a sidelink service, such as when a sidelink service is a periodic service; a cycle of a sidelink discontinuous reception (SL DRX cycle); a timing cycle of a sidelink discontinuous reception on-duration timer (SL DRX on-duration timer); a timing cycle of a sidelink discontinuous reception inactivity timer (SL DRX inactivity timer); however, this disclosure is not limited thereto. Furthermore, the above timing cycle refers to a value of the timer, which indicates a timing cycle of the timer.
In some embodiments, the timer in the above first conditions includes at least one of the following: a timer configured by a network device (such as via an RRC message) or a predefined timer; a sidelink discontinuous reception on-duration timer (SL DRX on-duration timer); and a sidelink discontinuous reception inactivity timer (SL DRX inactivity timer). In the embodiments, the SL DRX on-duration timer and/or SL DRX inactivity timer may be configured by the network device via system information or an RRC dedicated message, or may be preconfigured; however, this disclosure is not limited thereto.
In some embodiments, the time in the above first conditions includes at least one of the following: a time configured by the network device (such as via an RRC message) or predefined time; a cycle of a sidelink service; a cycle of a sidelink discontinuous reception (SL DRX cycle); a timing cycle of a sidelink discontinuous reception on-duration timer (SL DRX on-duration timer); and a timing cycle of a sidelink discontinuous reception inactivity timer (SL DRX inactivity timer); however, this disclosure is not limited thereto. Furthermore, the above timing cycle refers to a value of the timer, which indicates a timing cycle of the timer.
In some embodiments, the timing cycle of the SL DRX cycle and/or SL DRX on-duration timer and/or SL DRX inactivity timer may be configured by the network device via system information or an RRC dedicated message, or may be preconfigured, or may be configured by an SL peer terminal equipment via an SL RRC message; however, this disclosure is not limited thereto.
In some embodiments, the upper layer in the above first conditions is one of the following: a vehicle-to-everything (V2X) layer, a non-access stratum (NAS), and a radio resource control (RRC) layer; however, this disclosure is not limited thereto.
In some embodiments, the MAC layer of the first terminal equipment generates a sidelink discontinuous reception command MAC CE (SL DRX command MAC CE) when there exists a sidelink resource, and transmits the sidelink discontinuous reception command MAC CE to the second terminal equipment via the sidelink resource.
In the embodiment of this disclosure, as shown in
In the embodiment of this disclosure, if one of the second conditions is satisfied, the sidelink discontinuous reception command is canceled. As a result, the sidelink discontinuous reception command may be canceled at a correct time, the receiving equipment (Rx UE) is enabled to keep monitoring the sidelink SCI and/or data, thereby preventing delay of data transmission from increasing.
In some embodiments, the other MAC CEs may be other MAC CEs to be transmitted on the sidelink, such as an SL CSI reporting MAC CE.
In some embodiments, that the upper layer of the first terminal equipment reconfigures discontinuous reception configuration includes that for a destination or a pair of source ID and destination ID or a PQI that the sidelink discontinuous reception command is triggered, the upper layer of the first terminal equipment reconfigures SL and/or DL discontinuous reception configuration; however, this disclosure is not limited thereto.
In some embodiments, the discontinuous reception configuration includes: a value of the SL DRX on-duration timer and/or a value of the SL DRX inactivity timer and/or a value of an SL DRX retransmission timer and/or a value of the SL DRX cycle and/or an upper bound of latency of CSI reporting.
In some embodiments, the upper layer in the second conditions is one of the following: a vehicle-to-everything (V2X) layer, a non-access stratum (NAS), and a radio resource control (RRC) layer; however, this disclosure is not limited thereto.
The above implementations only illustrate the embodiment of this disclosure. However, this disclosure is not limited thereto, and appropriate variants may be made on the basis of these implementations. For example, the above implementations may be executed separately, or one or more of them may be executed in a combined manner.
It should be noted that the above description is given by taking that operation 301 is executed separately or operations 301 and 302 are executed jointly as an example. However, this disclosure is not limited thereto, and operation 302 may also be executed separately, that is, implementation of operation 302 is not dependent on 301, and the MAC layer of the first terminal equipment cancels the sidelink discontinuous reception command when one of the above second conditions is satisfied.
According to the method of the embodiment of this disclosure, power consumption of the receiving equipment (Rx UE) may be saved or delay of data transmission may be prevented from increasing.
The embodiment of this disclosure provides a method for triggering a scheduling request to which a sidelink discontinuous reception command corresponds, which shall be described from a side of a first terminal equipment.
In the above embodiment, when the sidelink discontinuous reception command is triggered, a corresponding SR (referred to as a first scheduling request) is triggered to request a network device to allocate sidelink resources for it, and the network device may allocate appropriate sidelink resources for the first terminal equipment accordingly.
In some embodiments, the first terminal equipment may trigger the first scheduling request to which the sidelink discontinuous reception command corresponds when one of the following conditions (third conditions) is satisfied that:
In the above embodiment, the network device may allocate an appropriate SL grant for the first terminal equipment, according to the first scheduling request.
In the embodiment of this disclosure, optionally as shown in
In the above embodiment, after the sidelink discontinuous reception command is transmitted, a corresponding SR (referred to as a second scheduling request) is triggered to inform the network device that it is not needed to allocate a sidelink resource for it any longer, and the network device may stop allocating sidelink resources for the first terminal equipment accordingly.
In some embodiments, the first terminal equipment may trigger the second scheduling request to which the sidelink discontinuous reception command corresponds when one of the following conditions (fourth conditions) is satisfied that:
In the above embodiment, the network device may stop allocating SL grants for the first terminal equipment according to the second scheduling request.
In some embodiments, the network device may further configure at least one corresponding SR configuration for the sidelink discontinuous reception command. For example, the first terminal equipment may receive configuration information transmitted by the network device, which includes the above at least one SR configuration. The first terminal equipment may use at least one SR configuration in the at least one SR configuration to transmit the first scheduling request and/or the second scheduling request to which the sidelink discontinuous reception command corresponds.
In some embodiments, the above configuration information is included in RRC signaling, that is, the network device configures the at least one SR configuration via RRC signaling. However, this disclosure is not limited thereto, and the above configuration information may also be included in other signaling transmitted by the network device.
In some embodiments, the SR configuration includes PUCCH resources on a bandwidth part (BWP), that is, the first terminal equipment uses the PUCCH resources on the bandwidth part to transmit the first scheduling request and/or the second scheduling request.
In some embodiments, the above at least one SR configuration is at least one of the following: SR configuration configured by the network device for the sidelink discontinuous reception command MAC CE; SR configuration configured by the network device for a sidelink logical channel; SR configuration configured by the network device for a sidelink channel state information reporting MAC CE; and SR configuration configured by the network device for a logical channel or an MAC CE of a sidelink or an uplink.
For example, after the first terminal equipment triggers the sidelink discontinuous reception command, if one of the above third conditions is satisfied, the first terminal equipment may transmit a first scheduling request to the network device by using at least one of the above SR configurations, requesting the network device to allocate sidelink resources for it.
For another example, after the first terminal equipment transmits the sidelink discontinuous reception command, if one of the above fourth conditions is satisfied, the first terminal equipment may transmit a second scheduling request to the network device by using at least one of the above SR configurations, informing the network device not to allocate sidelink resources for it any longer.
In some embodiments, the network device may configure different SR configurations for the first scheduling request and second scheduling request in the RRC reconfiguration message. Hence, the network device may distinguish different situations. However, this disclosure is not limited thereto, and the first scheduling request and second scheduling request may also have identical SR configurations.
In the embodiment of this disclosure, optionally, as shown in
In the above embodiment, after the sidelink discontinuous reception command MAC CE is transmitted, the SR (the first scheduling request) to which the sidelink discontinuous reception command corresponds is canceled, so as to inform the network device not to allocate sidelink resources for it any longer, and the network device may stop allocating sidelink resources for the first terminal equipment accordingly.
It should be noted that
The above implementations only illustrate the embodiment of this disclosure. However, this disclosure is not limited thereto, and appropriate variants may be made on the basis of these implementations. For example, the above implementations may be executed separately, or one or more of them may be executed in a combined manner.
It should be noted that the above description is given by taking that operation 401 is executed separately or operations 401 and 402 are executed jointly as an example. However, this disclosure is not limited thereto, and operation 402 may also be executed separately, that is, implementation of operation 402 is not dependent on 401, and the first terminal equipment triggers the second scheduling request to which the sidelink discontinuous reception command corresponds after transmitting the sidelink discontinuous reception command.
According to the method of the embodiment of this disclosure, waste of sidelink resources may be avoided.
The embodiment of this disclosure provides a method for selecting a resource pool, which shall be described from a side of a first terminal equipment.
In the above embodiment, in selecting the resource pool, the priority of the sidelink discontinuous reception command and the HARQ feedback attribute are taken into account, thereby ensuring reliability of transmission of sidelink discontinuous reception command MAC CEs.
In some embodiments, if the priority of the sidelink logical channel is higher than or equal to the priority of the sidelink discontinuous reception command, when the HARQ feedback attribute (sl-HARQ-FeedbackEnabled) of the sidelink logical channel is configured as being enabled, the first terminal equipment selects a resource pool configured with PSFCH resources from resource pools that are configured by the network device or preconfigured. Otherwise, that is, if the HARQ feedback attribute of the sidelink logical channel is not configured as being enabled, the first terminal equipment selects a resource pool from resource pools that are configured by the network device or preconfigured.
In some embodiments, if the priority of the sidelink discontinuous reception command is higher than that of the sidelink logical channel, when the HARQ feedback attribute (sl-HARQ-FeedbackEnabled) of the sidelink discontinuous reception command is configured as being enabled, the first terminal equipment selects a resource pool configured with PSFCH resources from resource pools that are configured by the network device or preconfigured. Otherwise, that is, if the HARQ feedback attribute of the sidelink discontinuous reception command is not configured as being enabled, the first terminal equipment selects a resource pool from resource pools that are configured by the network device or preconfigured.
In the above embodiment, if only the data of the logical channel is to be transmitted, when the HARQ feedback attribute of the sidelink logical channel is configured as being enabled, the first terminal equipment may select a resource pool configured with PSFCH resources from the resource pools that are configured by the network device or preconfigured; otherwise, that is, if the HARQ feedback attribute of the sidelink logical channel is not configured as being enabled, the first terminal equipment select a resource pool from the resource pools that are configured by the network device or preconfigured.
In the above embodiment, if only the sidelink discontinuous reception command is triggered, when the HARQ feedback attribute of the sidelink discontinuous reception command is configured as being enabled, the first terminal equipment may select a resource pool configured with PSFCH resources from the resource pools that are configured by the network device or preconfigured; otherwise, that is, if the HARQ feedback attribute of the sidelink discontinuous reception command is not configured as being enabled, the first terminal equipment select a resource pool from the resource pools that are configured by the network device or preconfigured.
In the above embodiment, if SL-CSI reporting is triggered, the first terminal equipment may select a resource pool from the resource pools that are configured by the network device or preconfigured.
The above embodiments may be described as:
In the above embodiments, the resource pools configured by the network device refer to resource pools for sidelink transmission (SL transmission) configured by the network device via system information or RRC dedicated signaling, and the preconfigured resource pools refer to resource pools for sidelink transmission configured via preconfiguration.
The above implementations only illustrate the embodiment of this disclosure. However, this disclosure is not limited thereto, and appropriate variants may be made on the basis of these implementations. For example, the above implementations may be executed separately, or one or more of them may be executed in a combined manner.
According to the method of the embodiment of this disclosure, reliability of transmission of sidelink discontinuous reception command MAC CEs may be ensured.
The embodiment of this disclosure provides a method for selecting a logical channel, which shall be described from a side of a first terminal equipment.
In the above embodiments, as to a sidelink LCP procedure or a sidelink MAC PDU assembly procedure or a sidelink MAC PDU generation procedure, for an SL grant configured with no PSFCH, in selecting the destination, the first terminal equipment select a logical channel (a second logical channel) or an MAC CE (a second MAC CE) with a highest priority from logical channels (first logical channels) satisfying predetermined conditions and MAC CEs (first MAC CEs) satisfying the fifth condition, and takes a destination where the selected MAC CE or logical channel is located as the destination.
In the above embodiment, the predetermined conditions include that:
Reference may be made to relevant techniques for the above predetermined conditions, which shall not be repeated herein any further.
In the above embodiment, as to a sidelink LCP procedure, for the SL grant configured with a PSFCH, if the HARQ feedback to which the logical channel or sidelink discontinuous reception command MAC CE with a highest priority corresponds is enabled, the logical channel or sidelink discontinuous reception command MAC CE with HARQ feedback being enabled is selected; and if the HARQ feedback to which the logical channel or sidelink discontinuous reception command MAC CE with a highest priority corresponds is disabled, the logical channel or sidelink discontinuous reception command MAC CE with HARQ feedback being disabled is selected.
The above implementations only illustrate the embodiment of this disclosure. However, this disclosure is not limited thereto, and appropriate variants may be made on the basis of these implementations. For example, the above implementations may be executed separately, or one or more of them may be executed in a combined manner.
For example, with reference to the embodiments of
In the embodiments in
The embodiment of this disclosure provides a method for transmitting sidelink transmission, which shall be described from a side of a first terminal equipment.
In the above embodiment, as the sidelink discontinuous reception command MAC CE has a configured or predefined priority, allocation of sidelink resources may be performed according to the priority, or the priority may be compared with priorities of other MAC CEs or logical channels or uplink transmissions, thereby enhancing reliability of sidelink transmission.
In some embodiments, as shown in
In the above embodiment, the first terminal equipment may indicate a priority of SL data to which the SCI corresponds to the second terminal equipment in the SCI, i.e. the priority of the sidelink discontinuous reception command MAC CE, thereby further enhancing reliability of sidelink transmission.
In the embodiment of this disclosure, the priority of the sidelink discontinuous reception command MAC CE indicated in the SCI or a priority of a sidelink discontinuous reception command MAC CE used in UL and SL priority comparison may be an integer between 1 and 8, such as 1 or 2, the smaller a value, the higher a priority.
In some embodiments, as shown in
In the above embodiment, the first terminal equipment may determine to transmit sidelink transmission or uplink transmission by using the above priority.
It should be noted that
In some embodiments, during the first terminal equipment performs the LCP procedure, the priority of the sidelink discontinuous reception command MAC CE is lower than a priority of a sidelink traffic channel data.
In the above embodiment, during the LCP resource allocation procedure, the priority of the sidelink discontinuous reception command MAC CE may be lower than the priority of the sidelink traffic channel (STCH) data. Hence, it may be ensured that the sidelink traffic data may be transmitted preferentially to the sidelink discontinuous reception command MAC CE, so that the second terminal equipment correctly receives the sidelink traffic data and then stops receiving the sidelink traffic data according to the received sidelink discontinuous reception command MAC CE.
In some embodiments, during the first terminal equipment performs the LCP procedure, the priority of the sidelink discontinuous reception command MAC CE may also be lower than the priority of the data of the sidelink control channel and higher than a priority of a sidelink CSI reporting MAC CE, or lower than a priority of a sidelink CSI reporting MAC CE and higher than the priority of the sidelink traffic channel data, which are not limited in this disclosure. Reference may be made to relevant techniques for a meaning of the priority of the sidelink CSI reporting MAC CE, which shall not be repeated herein any further.
In some embodiments, the first terminal equipment may generate an MAC PDU in generating the sidelink discontinuous receive command MAC CE.
For example, a corresponding standard may be modified as follows:
According to the method of the embodiment of this disclosure, reliability of sidelink transmission may be enhanced.
It was found by the inventors that in a current standard, a buffer size field in an SL-BSR MAC CE is described as follows:
In the current standard, a condition for generating an SL-BSR MAC CE is that there exists a UL-SCH resource for new transmission and the UL-SCH resource is able to accommodate a SL-BSR MAC CE and its sub-header during the LCP procedure. That is, a UL MAC PDU containing the SL-BSR MAC CE will be built.
However, in generating the SL-BSR MAC CE, there may or may not be transmissions on the sidelink, as shown in
Assuming that the “MAC PDU” in the text of the above current standard refers to a UL MAC PDU, as a buffer size of the sidelink is not related to construction of the UL MAC PDU or the UL LCP procedure, if there is no data transmission on the sidelink, it will not result in that a value of the buffer size field of the sidelink is 0.
Assuming that the “MAC PDU” in the text of the above current standard refers to an SL MAC PDU, if there is no data transmission on the sidelink, there will be no SL MAC PDU; and if there is data transmission on the sidelink, a value of the buffer size of the SL-BSR will be affected only when the sidelink transmission overlaps with transmission of the SL-BSR in time and a terminal equipment is capable of simultaneously transmitting the sidelink (SL) and an uplink (UL).
Therefore, the definition of “after the MAC PDU has been built (i.e. after the logical channel prioritization procedure, which may result in the value of the Buffer Size field to zero)” in the text of the above standard is unclear.
In order to solve the above problems, the embodiment of this disclosure provides a method for generating a sidelink buffer status report, which shall be described from a side of a first terminal equipment. In the embodiments, the first terminal equipment performs sidelink transmission to a second terminal equipment. From the perspective of transmitting sidelink data transmission, the first terminal equipment of the embodiment of this disclosure is a transmitting equipment (Tx UE), and the second terminal equipment is a receiving equipment (Rx UE).
In the above embodiment, by modifying description of the buffer size field in the SL-BSR, it is beneficial for the network device to learn a sidelink buffer status of the terminal equipment, so as perform adaptive scheduling to meet QoS requirements of sidelink traffics.
In some embodiments, the buffer size field in the SL-BSR identifies the total number of available data of all logical channels of a logical channel group of a destination after an MAC PDU is built, the MAC PDU including a sidelink buffer status report MAC CE, or the MAC PDU being a UL MAC PDU.
For example, corresponding to the standards, following modifications may be made:
Or, corresponding to the standards, following modifications may be made:
In some embodiments, the buffer size field in the SL-BSR identifies the total number of available data of all logical channels of a logical channel group of a destination when an MAC PDU is built, the MAC PDU including a sidelink buffer status report MAC CE, or the MAC PDU being a UL MAC PDU.
For example, corresponding to the standards, following modifications may be made:
Or, corresponding to the standards, following modifications may be made:
In some embodiments, the buffer size field in the SL-BSR identifies the total number of available data of all logical channels of a logical channel group of a destination when a sidelink buffer status report MAC CE is generated.
For example, corresponding to the standards, following modifications may be made:
In some embodiments, the buffer size field in the SL-BSR identifies the total number of available data of all logical channels of a logical channel group of a destination when a sidelink buffer status report MAC CE is triggered.
For example, corresponding to the standards, following modifications may be made:
In some embodiments, the buffer size field in the SL-BSR identifies the total number of available data of all logical channels of a logical channel group of a destination after a sidelink MAC PDU is built, wherein uplink transmission and sidelink transmission overlap in time and the first terminal equipment has the ability to simultaneously perform uplink transmission and sidelink transmission, and wherein after a sidelink LCP procedure, it will be resulted in that a value of a buffer size field is zero.
For example, corresponding to the standards, following modifications may be made:
In the above embodiment, the total number of available data of all logical channels of a logical channel group of a destination is obtained in a data amount calculation process in technical specifications 38.322 and 38.323.
The above implementations only illustrate the embodiment of this disclosure. However, this disclosure is not limited thereto, and appropriate variants may be made on the basis of these implementations. For example, the above implementations may be executed separately, or one or more of them may be executed in a combined manner. For example, the last identification mode may be combined with the former four identification modes.
According to the method of the embodiment of this disclosure, behaviors of determining the buffer size field in the SL-BSR in the MAC layer of the terminal equipment is clearly defined, which is beneficial for the network device to learn a sidelink buffer status of the terminal equipment, so as to perform adaptive scheduling to meet QoS requirements of sidelink traffics.
The embodiment of this disclosure provides an apparatus for triggering a sidelink discontinuous reception command.
As shown in
In some embodiments, that a logical channel to which a destination or a pair of source ID and destination ID or a PQI corresponds has no data to be transmitted refers to that a buffer size of a logical channel to which a destination or a pair of source ID and destination ID or a PQI corresponds is 0.
In some embodiments, the current service period includes at least one of the following: a cycle of a sidelink service (in a case where the sidelink service is cyclic service); a cycle of a sidelink discontinuous reception (SL DRX cycle); a timing cycle of a sidelink discontinuous reception on-duration timer (SL DRX on-duration timer); a timing cycle of a sidelink discontinuous reception inactivity timer (SL DRX inactivity timer).
In some embodiments, the timer includes at least one of the following: a timer configured by a network device or a predefined timer; a sidelink discontinuous reception on-duration timer (SL DRX on-duration timer); and a sidelink discontinuous reception inactivity timer (SL DRX inactivity timer).
In the embodiments, the SL DRX on-duration timer and/or SL DRX inactivity timer may be configured by the network device via system information or an RRC dedicated message, or may be preconfigured.
In some embodiments, the time includes at least one of the following: a time configured by the network device or a predefined time; a cycle of a sidelink service; a cycle of a sidelink discontinuous reception (SL DRX cycle); a timing cycle of a sidelink discontinuous reception on-duration timer (SL DRX on-duration timer); and a timing cycle of a sidelink discontinuous reception inactivity timer (SL DRX inactivity timer).
In the embodiments, the timing cycle of the SL DRX cycle and/or SL DRX on-duration timer and/or SL DRX inactivity timer may be configured by the network device via system information or an RRC dedicated message, or may be preconfigured, or may be configured by an SL peer terminal equipment via an SL RRC message.
In some embodiments, the upper layer is one of the following: a vehicle-to-everything (V2X) layer, a non-access stratum (NAS), and a radio resource control (RRC) layer.
In some embodiments, the MAC layer of the first terminal equipment generates a sidelink discontinuous reception command MAC CE when there exists a sidelink resource, and transmits the sidelink discontinuous reception command MAC CE to a second terminal equipment via the sidelink resource. Hence, the apparatus 1100 of the embodiment of this disclosure may further include a generating unit (not shown) and a transmitting unit (not shown), wherein the generating unit generates the above sidelink discontinuous reception command MAC CE, and the transmitting unit transmits the sidelink discontinuous reception command MAC CE to the second terminal equipment via the obtained sidelink resource.
In some embodiments, as shown in
In some embodiments, the other MAC CEs may be other MAC CEs to be transmitted on the sidelink, such as an SL CSI reporting MAC CE.
In some embodiments, the upper layer is one of the following: a vehicle-to-everything (V2X) layer, a non-access stratum (NAS), and a radio resource control (RRC) layer.
In some embodiments, that the upper layer of the first terminal equipment reconfigures discontinuous reception configuration includes that:
In some embodiments, the discontinuous reception configuration includes: a value of the SL on-duration timer and/or a value of the inactivity timer and/or a value of an SL retransmission timer and/or a value of the SL DRX cycle and/or an upper bound of latency of CSI reporting.
It should be noted that the components or modules related to this disclosure are only described above. However, this disclosure is not limited thereto, and the apparatus 1100 may further include other components or modules, and reference may be made to related techniques for particulars of these components or modules. And furthermore, the modules in
Furthermore, for the sake of simplicity, connection relationships between the components or modules or signal profiles are only illustrated in
According to the apparatus of the embodiment of this disclosure, the sidelink discontinuous reception command MAC CE may be triggered or canceled at a correct time, which may save power consumption of a receiving equipment or prevent delay of data transmission from increasing.
The embodiment of this disclosure provides an apparatus for triggering a scheduling request to which a sidelink discontinuous reception command corresponds.
As shown in
In the above embodiment, the first triggering unit 1201 triggers the first scheduling request to which the sidelink discontinuous reception command corresponds when one of the following conditions is satisfied that: there exists no sidelink resource used for new transmission; a sidelink resource used for new transmission is unable to accommodate a sidelink discontinuous reception command MAC CE and its sub-header; and a sidelink resource used for new transmission is unable to accommodate a sub-header of a sidelink discontinuous reception command MAC CE.
In some embodiments, as shown in
In some embodiments, the second triggering unit 1202 triggers the second scheduling request to which the sidelink discontinuous reception command corresponds when one of the following conditions is satisfied that: a sidelink resource used for new transmission is able to accommodate a sidelink discontinuous reception command MAC CE and its sub-header and all data waiting to be transmitted; and a sidelink resource used for new transmission is able to accommodate a sub-header of a sidelink discontinuous reception command MAC CE and all data waiting to be transmitted.
In some embodiments, as shown in
In the embodiments, the transmitting unit 1204 may be combined with the first triggering unit 1201 and/or the second triggering unit 1202.
In some embodiments, the configuration information is contained in RRC signaling.
In some embodiments, the SR configuration includes PUCCH resources on a bandwidth part (BWP). Hence, the transmitting unit 1204 may transmit the above first scheduling request and/or the second scheduling request by using the PUCCH resources.
In some embodiments, the at least one SR configuration is at least one of the following:
In some embodiments, the network device may configure different SR configurations for the first scheduling request and second scheduling request in the RRC reconfiguration message.
In some embodiments, as shown in
It should be noted that the components or modules related to this disclosure are only described above. However, this disclosure is not limited thereto, and the apparatus 1200 may further include other components or modules, and reference may be made to related techniques for particulars of these components or modules. And furthermore, the modules in
Furthermore, for the sake of simplicity, connection relationships between the components or modules or signal profiles are only illustrated in
According to the apparatus of the embodiment of this disclosure, the network device may be informed to stop allocating sidelink resources, thereby avoiding waste of sidelink resources.
The embodiment of this disclosure provides an apparatus for selecting a resource pool.
In the embodiment of this disclosure, the apparatus for selecting a resource pool is configured in a first terminal equipment, the first terminal equipment performing sidelink transmission to a second terminal equipment, and the second terminal equipment using SL DRX. As shown in
In some embodiments, if the priority of the sidelink logical channel is higher than or equal to the priority of the sidelink discontinuous reception command, when the HARQ feedback attribute of the sidelink logical channel is configured as being enabled, the selecting unit 1301 selects a resource pool configured with PSFCH resources from resource pools that are configured by the network device or preconfigured.
In some embodiments, if the priority of the sidelink discontinuous reception command is higher than that of the sidelink logical channel, when the HARQ feedback attribute of the sidelink discontinuous reception command is configured as being enabled, the selecting unit 1301 selects a resource pool configured with PSFCH resources from resource pools that are configured by the network device or preconfigured.
It should be noted that the components or modules related to this disclosure are only described above. However, this disclosure is not limited thereto, and the apparatus 1300 may further include other components or modules, and reference may be made to related techniques for particulars of these components or modules.
Furthermore, the above components or modules may be implemented by hardware, such as a processor, a memory, a transmitter, and a receiver, etc., which are not limited in the embodiment of this disclosure.
According to the apparatus of the embodiment of this disclosure, reliability of transmission of sidelink discontinuous reception command MAC CEs may be ensured.
The embodiment of this disclosure provides an apparatus for selecting a logical channel.
As shown in
As shown in
It should be noted that the components or modules related to this disclosure are only described above. However, this disclosure is not limited thereto, and the apparatuses 1400 and 1500 may further include other components or modules, and reference may be made to related techniques for particulars of these components or modules.
Furthermore, for the sake of simplicity, connection relationships between the components or modules or signal profiles are only illustrated in
According to the apparatus of the embodiment of this disclosure, reliability of transmission of sidelink discontinuous reception command MAC CEs may be ensured.
The embodiment of this disclosure provides an apparatus for transmitting sidelink transmission.
As shown in
In some embodiments, as shown in
In some embodiments, as shown in
In some embodiments, during the first terminal equipment performs the LCP procedure, the priority of the sidelink discontinuous reception command MAC CE is lower than a priority of a sidelink traffic channel data.
In some embodiments, as shown in
It should be noted that the components or modules related to this disclosure are only described above. However, this disclosure is not limited thereto, and the apparatus 1600 may further include other components or modules, and reference may be made to related techniques for particulars of these components or modules.
Furthermore, for the sake of simplicity, connection relationships between the components or modules or signal profiles are only illustrated in
According to the apparatus of the embodiment of this disclosure, reliability of sidelink transmission is enhanced.
The embodiment of this disclosure provides an apparatus for generating a sidelink buffer status report.
As shown in
The generating unit 1701 generates a sidelink buffer status report (SL BSR), a buffer size field in the sidelink buffer status report identifying at least one of the following:
The transmitting unit 1702 transmits the sidelink buffer status report to a network device.
It should be noted that the components or modules related to this disclosure are only described above. However, this disclosure is not limited thereto, and the apparatus 1700 may further include other components or modules, and reference may be made to related techniques for particulars of these components or modules.
Furthermore, the above components or modules may be implemented by hardware, such as a processor, a memory, a transmitter, and a receiver, etc., which are not limited in the embodiment of this disclosure.
According to the apparatus of the embodiment of this disclosure, it is beneficial for the network device to learn a sidelink buffer status of the terminal equipment, so as perform adaptive scheduling to meet QoS requirements of sidelink traffics.
The embodiment of this disclosure provides a communication system, with contents identical to those in the embodiments of the first to twelfth aspects being not going to be described herein any further.
In some embodiments, the communication system may at least include a first terminal equipment and a second terminal equipment, the first terminal equipment performing sidelink transmission to the second terminal equipment, and the second terminal equipment using SL DRX. In the embodiments, the first terminal equipment is taken as a transmitting equipment and configured to carry out the method as described in any one of the embodiments of the first to sixth aspects, and the second terminal equipment is taken as a receiving equipment and configured to receive sidelink transmission transmitted by the first terminal equipment at an SL DRX active time.
In some embodiments, the communication system may at least include a first terminal equipment, a second terminal equipment and a network device. In the embodiments, the first terminal equipment is taken as a transmitting equipment and configured to carry out the method as described in any one of the embodiments of the first to sixth aspects, the second terminal equipment is taken as a receiving equipment and configured to receive sidelink transmission transmitted by the first terminal equipment at an SL DRX active time, and the network device is configured to allocate sidelink resources for the first terminal equipment.
The embodiment of this disclosure further provides a terminal equipment.
For example, the processor 1801 may be configured to execute a program to carry out the methods as described in any one of the embodiments of the first to sixth aspects.
As shown in
An embodiment of this disclosure provides a computer readable program, which, when executed in a terminal equipment, will cause the terminal equipment to carry out the methods as described in any one of the embodiments of the first to sixth aspects.
An embodiment of this disclosure provides a storage medium storing a computer readable program, which will cause a terminal equipment to carry out the methods as described in any one of the embodiments of the first to sixth aspects.
The above apparatuses and methods of this disclosure may be implemented by hardware, or by hardware in combination with software. This disclosure relates to such a computer-readable program that when the program is executed by a logic device, the logic device is enabled to carry out the apparatus or components as described above, or to carry out the methods or steps as described above. This disclosure also relates to a storage medium for storing the above program, such as a hard disk, a floppy disk, a CD, a DVD, and a flash memory, etc.
The methods/apparatuses described with reference to the embodiments of this disclosure may be directly embodied as hardware, software modules executed by a processor, or a combination thereof. For example, one or more functional block diagrams and/or one or more combinations of the functional block diagrams shown in the drawings may either correspond to software modules of procedures of a computer program, or correspond to hardware modules. Such software modules may respectively correspond to the steps shown in the drawings. And the hardware module, for example, may be carried out by firming the soft modules by using a field programmable gate array (FPGA).
The soft modules may be located in an RAM, a flash memory, an ROM, an EPROM, and EEPROM, a register, a hard disc, a floppy disc, a CD-ROM, or any memory medium in other forms known in the art. A memory medium may be coupled to a processor, so that the processor may be able to read information from the memory medium, and write information into the memory medium; or the memory medium may be a component of the processor. The processor and the memory medium may be located in an ASIC. The soft modules may be stored in a memory of a mobile terminal, and may also be stored in a memory card of a pluggable mobile terminal. For example, if equipment (such as a mobile terminal) employs an MEGA-SIM card of a relatively large capacity or a flash memory device of a large capacity, the soft modules may be stored in the MEGA-SIM card or the flash memory device of a large capacity.
One or more functional blocks and/or one or more combinations of the functional blocks in the drawings may be realized as a universal processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware component or any appropriate combinations thereof carrying out the functions described in this application. And the one or more functional block diagrams and/or one or more combinations of the functional block diagrams in the drawings may also be realized as a combination of computing equipment, such as a combination of a DSP and a microprocessor, multiple processors, one or more microprocessors in communication combination with a DSP, or any other such configuration.
This disclosure is described above with reference to particular embodiments. However, it should be understood by those skilled in the art that such a description is illustrative only, and not intended to limit the protection scope of the present disclosure. Various variants and modifications may be made by those skilled in the art according to the principle of the present disclosure, and such variants and modifications fall within the scope of the present disclosure.
As to implementations containing the above embodiments, following supplements are further disclosed.
This application is a continuation application of International Application PCT/CN2021/084768 filed on Mar. 31, 2021, and designated the U.S., the entire contents of which are incorporated herein by reference.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/CN2021/084768 | Mar 2021 | US |
| Child | 18370639 | US |
