Sidelink carrier indication method, terminal, base station, and storage medium

Abstract

The present invention provides a sidelink carrier indication method, a terminal, a base station, a storage medium, and a computer program. The method comprises: when it is detected that at least one first sidelink carrier is unavailable and at least one second sidelink carrier is available, a terminal sends, to a base station, relevant information that the first sidelink carrier is unavailable.

Description

Sidelink carrier indication method, terminal, base station and storage medium

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure is based on and claims priority to an application with CN application number 202311455520.7 and filing date November 3, 2023. The disclosure content of this CN application is hereby introduced into this disclosure as a whole. Technical Field

[0003] The present application relates to the field of communication technologies, and in particular to a sidelink carrier indication method, terminal, base station, storage medium, and computer program. Background Art

[0004] To improve the near-area communication rate, terminals can use multiple carriers simultaneously for unicast near-area communication. When terminals communicate simultaneously using multiple carriers (sidelink carriers), if a terminal detects that the number of consecutive failures to receive sidelink HARQ (Hybrid Automatic Repeat Request) feedback on a carrier has reached the maximum value (i.e., this carrier is unavailable), and the number of consecutive failures to receive sidelink HARQ feedback on other carriers has not reached the maximum value (i.e., other carriers are available), the terminal will not determine that the sidelink radio link has failed, will not release the connection between the terminals, and will not report the sidelink radio link failure to the base station because the other carriers are available.

[0005] Summary of the Invention

[0006] According to a first aspect of the present disclosure, a sidelink carrier indication method is provided, which is applied to a terminal. The method includes: when it is monitored that at least one first sidelink carrier is unavailable and at least one second sidelink carrier is available, sending information related to the unavailability of the first sidelink carrier to a base station.

[0007] In some embodiments, the configured sidelink grant corresponding to the first sidelink carrier is deactivated or released.

[0008] In some embodiments, sidelink authorization deactivation indication information sent by the base station is received; and according to the sidelink authorization deactivation indication information, the configured sidelink authorization information corresponding to the first sidelink carrier is cleared; or, sidelink carrier release indication information sent by the base station is received; and according to the sidelink carrier release indication information, the configured sidelink authorization information corresponding to the first sidelink carrier is cleared and the corresponding configuration is released.

[0009] In some embodiments, the receiving of the side link authorization deactivation indication information sent by the base station includes: receiving L1 signaling sent by the base station and carrying the side link authorization deactivation indication information; or receiving RRC signaling sent by the base station and carrying the side link carrier release information.

[0010] In some embodiments, the sending of the first sidelink carrier unavailable related information to the base station includes: sending a SidelinkUEInformationNR message or a MAC CE carrying the first sidelink carrier unavailable related information to the base station.

[0011] In some embodiments, the information related to the unavailability of the first sidelink carrier includes at least one of: sidelink carrier unavailability indication information, a destination identifier corresponding to the first sidelink carrier, and frequency information of the first sidelink carrier.

[0012] In some embodiments, the second sidelink carrier unavailability related information is sent to the peer terminal.

[0013] In some embodiments, sending the second sidelink carrier unavailable related information to the peer terminal includes: sending a second message carrying the second sidelink carrier unavailable related information to the peer terminal; wherein the second message includes: at least one of: PC5 RRC message, PC5-S message, and discovery message.

[0014] In some embodiments, the second sidelink carrier unavailability related information includes at least one of: sidelink carrier unavailability indication information, carrier information of the first sidelink carrier, and frequency information of the first sidelink carrier.

[0015] In some embodiments, when the number of continuous hybrid automatic repeat request discontinuous transmission HARQ DTX on the first sidelink carrier reaches a maximum value, the MAC entity of the terminal indicates to the upper layer of the terminal that the first sidelink carrier is unavailable.

[0016] In some embodiments, if the number of consecutive HARQ DTX times on the second sidelink carrier does not reach a maximum value, it is determined that the second sidelink carrier is available.

[0017] According to a second aspect of the present disclosure, a sidelink carrier indication method is provided, which is applied to a base station, and the method includes: receiving information related to the unavailability of a first sidelink carrier sent by a terminal; wherein, when the terminal monitors that at least one first sidelink carrier is unavailable and at least one second sidelink carrier is available, the terminal sends information related to the unavailability of the first sidelink carrier.

[0018] In some embodiments, sidelink authorization deactivation indication information or sidelink carrier release information is sent to the terminal; wherein, the terminal clears the configured sidelink authorization information corresponding to the first sidelink carrier according to the sidelink authorization deactivation indication information; or, the terminal clears the configured sidelink authorization information corresponding to the first sidelink carrier and releases the corresponding configuration according to the sidelink carrier release indication information.

[0019] In some embodiments, the sending of sidelink grant deactivation indication information to the terminal includes: sending L1 signaling carrying the sidelink grant deactivation indication information or RRC signaling carrying the sidelink carrier release information to the terminal.

[0020] In some embodiments, the information related to the unavailability of the first sidelink carrier includes at least one of: sidelink carrier unavailability indication information, a destination identifier corresponding to the first sidelink carrier, and frequency information of the first sidelink carrier.

[0021] According to a third aspect of the present disclosure, a terminal is provided, comprising: a carrier status sending module, configured to send information related to the unavailability of a first sidelink carrier to a base station when it is monitored that at least one first sidelink carrier is unavailable and at least one second sidelink carrier is available.

[0022] In some embodiments, the sidelink processing module is configured to deactivate or release the configured sidelink grant corresponding to the first sidelink carrier.

[0023] In some embodiments, the indication information receiving module is used to receive side link authorization deactivation indication information or side link carrier release information sent by the base station; the side link processing module is used to clear the configured side link authorization information corresponding to the first side link carrier according to the side link authorization deactivation indication information; or, according to the side link carrier release indication information, clear the configured side link authorization information corresponding to the first side link carrier and release the corresponding configuration.

[0024] In some embodiments, the indication information receiving module is used to receive L1 signaling sent by the base station and carrying the sidelink authorization deactivation indication information, or to receive RRC signaling sent by the base station and carrying the sidelink carrier release information.

[0025] In some embodiments, the carrier status sending module is used to send a SidelinkUEInformationNR message or MAC CE carrying information related to the unavailability of the first sidelink carrier to the base station.

[0026] In some embodiments, the information related to the unavailability of the first sidelink carrier includes at least one of: sidelink carrier unavailability indication information, a destination identifier corresponding to the first sidelink carrier, and frequency information of the first sidelink carrier.

[0027] In some embodiments, the carrier status sending module is configured to send information related to unavailability of the second sidelink carrier to the peer terminal.

[0028] In some embodiments, the carrier status sending module is used to send a second message carrying information related to the unavailability of the second sidelink carrier to the peer terminal; wherein the second message includes: at least one of: PC5 RRC message, PC5-S message, and discovery message.

[0029] In some embodiments, the second sidelink carrier unavailability related information includes at least one of: sidelink carrier unavailability indication information and frequency information of the first sidelink carrier.

[0030] In some embodiments, the carrier status sending module is used to indicate to the upper layer of the terminal through the MAC entity of the terminal that the first sidelink carrier is unavailable when the number of continuous hybrid automatic repeat request discontinuous transmission HARQ DTX on the first sidelink carrier reaches a maximum value.

[0031] In some embodiments, the carrier status sending module is configured to determine that the second sidelink carrier is available when the number of consecutive HARQ DTX times on the second sidelink carrier does not reach a maximum value.

[0032] According to a fourth aspect of the present disclosure, a terminal is provided, comprising: a memory; and a processor coupled to the memory, wherein the processor is configured to execute the method described above based on instructions stored in the memory.

[0033] According to a fifth aspect of the present disclosure, a base station is provided, comprising: a carrier status receiving module for receiving information related to the unavailability of a first sidelink carrier sent by a terminal; wherein the terminal sends information related to the unavailability of the first sidelink carrier when it monitors that at least one first sidelink carrier is unavailable and at least one second sidelink carrier is available.

[0034] In some embodiments, the indication information sending module is used to send sidelink authorization deactivation indication information or sidelink carrier release information to the terminal; wherein, the terminal clears the configured sidelink authorization information corresponding to the first sidelink carrier according to the sidelink authorization deactivation indication information; or, the terminal clears the configured sidelink authorization corresponding to the first sidelink carrier and releases the corresponding configuration according to the sidelink carrier release indication information.

[0035] In some embodiments, the indication information sending module is configured to send L1 signaling carrying the sidelink grant deactivation indication information or RRC signaling carrying the sidelink carrier release information to the terminal.

[0036] In some embodiments, the information related to the unavailability of the first sidelink carrier includes at least one of: sidelink carrier unavailability indication information, a destination identifier corresponding to the first sidelink carrier, and frequency information of the first sidelink carrier.

[0037] According to a sixth aspect of the present disclosure, a base station is provided, comprising: a memory; and a processor coupled to the memory, wherein the processor is configured to execute the method described above based on instructions stored in the memory.

[0038] According to a seventh aspect of the present disclosure, a communication system is provided, including: the terminal as described above, and the base station as described above.

[0039] According to an eighth aspect of the present disclosure, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the instructions are executed by a processor to perform the method described above.

[0040] According to a ninth aspect of the present disclosure, there is provided a computer program comprising: instructions, which, when executed by a processor, cause the processor to perform the method as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technologies, a brief introduction to the drawings required for use in the embodiments or related technology descriptions will be given below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor. In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technologies, a brief introduction to the drawings required for use in the embodiments or related technology descriptions will be given below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0042] FIG1 is a schematic flow chart of some embodiments of a sidelink carrier indication method according to the present disclosure;

[0043] FIG2 is a schematic diagram of a process of clearing a sidelink grant in some embodiments of the sidelink carrier indication method according to the present disclosure;

[0044] FIG3 is a schematic diagram of an application scenario of the sidelink carrier indication method disclosed herein;

[0045] FIG4 is a flowchart illustrating other embodiments of a sidelink carrier indication method according to the present disclosure;

[0046] FIG5 is a schematic diagram of a process of communicating with a peer terminal in some embodiments of the sidelink carrier indication method according to the present disclosure;

[0047] FIG6 is a flowchart illustrating further embodiments of the sidelink carrier indication method according to the present disclosure;

[0048] FIG7 is a module diagram of some embodiments of a terminal according to the present disclosure;

[0049] FIG8 is a module diagram of another embodiment of a terminal according to the present disclosure;

[0050] FIG9 is a module diagram of some embodiments of a base station according to the present disclosure;

[0051] FIG10 is a module diagram of another embodiment of a base station according to the present disclosure. DETAILED DESCRIPTION

[0052] Exemplary embodiments of the present disclosure will be described below with reference to the accompanying drawings. For the sake of clarity and conciseness, not all features of the embodiments are described in the specification. However, it should be understood that many implementation-specific settings must be made in the process of implementing the embodiments in order to achieve the developer's specific goals, such as meeting those restrictions related to equipment and services, and these restrictions may vary depending on the implementation. In addition, it should be understood that although the development work may be very complex and time-consuming, it is only a routine task for those skilled in the art who benefit from the contents of this disclosure.

[0053] It should be noted that the relative arrangement of components and steps, the numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.

[0054] Those skilled in the art will understand that the terms "first" and "second" in the embodiments of the present disclosure are only used to distinguish different steps, devices or modules, and do not represent any specific technical meanings, nor do they indicate a necessary logical order between them.

[0055] It should also be understood that in the embodiments of the present disclosure, “a plurality of” may refer to two or more than two, and “at least one” may refer to one, two, or more than two.

[0056] It should also be understood that any component, data or structure mentioned in the embodiments of the present disclosure can generally be understood as one or more, unless explicitly limited or otherwise indicated in the context.

[0057] In addition, the term "and / or" in this disclosure is merely a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this disclosure generally indicates that the related objects are in an "or" relationship.

[0058] It should also be understood that the description of the various embodiments in this disclosure focuses on the differences between the various embodiments, and the same or similar aspects thereof can be referenced with each other. For the sake of brevity, they will not be described one by one.

[0059] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0060] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0061] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0062] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0063] In addition, in order to avoid obscuring the present disclosure with unnecessary details, only the processing steps and / or device structures that are closely related to at least the solution according to the present disclosure are shown in the drawings, while other details that are not closely related to the present disclosure are omitted. It should also be noted that similar reference numerals and letters in the drawings indicate similar items, and therefore once an item is defined in one drawing, it does not need to be discussed again for subsequent drawings.

[0064] Among the related technologies known to the inventors, near-area communication (NAC) addresses the issue of insufficient mobile communication coverage in certain scenarios. Users can connect to other users' terminals via Wi-Fi or other wireless technologies, and connect to the internet through the other users' terminals' mobile communication networks. There are two modes for allocating NAC resources to terminals: The terminal selects the required resources from a network-configured or pre-configured resource pool for communication; the base station selects NAC resources for the terminal, and the terminal conducts NAC communications according to the base station's scheduling. The base station can dynamically or semi-statically schedule resources used for NAC between terminals.

[0065] When terminals conduct unicast near-area communication with each other, they can use a single carrier. When the number of consecutive failures to receive sidelink HARQ feedback on this carrier reaches an upper limit, the terminal determines that the sidelink radio link is unavailable, releases the RRC connection between the terminals, and reports the sidelink radio link failure to the base station. With the development of near-area communication technology, in order to improve the near-area communication rate, terminals can simultaneously use multiple carriers when conducting unicast near-area communication with each other, which is beneficial for improving the near-area communication rate.

[0066] When terminals communicate simultaneously using multiple carriers (sidelink carriers), if the terminal detects that the number of consecutive failures to receive sidelink HARQ feedback on a certain carrier has reached the upper limit (i.e., this carrier is in an unavailable state), while the number of consecutive failures to receive sidelink HARQ feedback on other carriers has not reached the upper limit (i.e., other carriers are in an available state), then because the other carriers are available, the terminal will not determine that the sidelink radio link has failed, and will not release the connection between the terminals, nor will it report the sidelink radio link failure to the base station. In this case, the base station cannot know that a carrier in the multi-carrier communication between the terminals is unavailable, and will not be able to correctly schedule resources for unicast near-area communication between the terminals.

[0067] For example, the channel conditions of the same sidelink carrier may be different for terminals in different geographical locations. If, before a sidelink carrier becomes unavailable, the base station (semi-statically) schedules periodic sidelink communication resources for the terminal, and the base station is unaware of the sidelink carrier's unavailability after the sidelink carrier becomes unavailable, the sidelink communication resources reserved for the terminal are wasted.

[0068] In view of this, a technical problem to be solved by the present application is to provide a side link carrier indication method, which can enable the base station to promptly know that the side link carrier of the terminal is unavailable, and release the side link communication transmission resources allocated to the terminal on this unavailable carrier. The released resources can be allocated to other terminals in need, thereby saving resources.

[0069] FIG1 is a flow chart of some embodiments of a sidelink carrier indication method according to the present disclosure, which is applied to a terminal, as shown in FIG1 :

[0070] Step 101: The terminal monitors the sidelink carrier.

[0071] In some embodiments, the terminal is a sidelink multi-carrier terminal, such as a mobile phone, tablet computer, or connected vehicle terminal. A sidelink (SL) is a communication link that directly communicates between two or more terminals without requiring data to pass through access network equipment or other devices. A sidelink carrier is a carrier configured for a sidelink based on a sidelink authorization. A terminal can simultaneously use multiple sidelink carriers for data communication with another terminal (a peer terminal), and the terminal monitors multiple sidelink carriers.

[0072] Step 102: When it is detected that at least one first sidelink carrier is unavailable and at least one second sidelink carrier is available, the terminal sends information related to the unavailability of the first sidelink carrier to the base station.

[0073] In some embodiments, a terminal may use a variety of methods to determine whether a sidelink carrier is unavailable. For example, data may be transmitted between a terminal and a peer terminal via a first sidelink carrier and a second sidelink carrier. If, on one or more first sidelink carriers, the terminal detects that the number of times it has not received PSFCH (Physical Sidelink Feedback Channel) signaling at the PSFCH reception timing (i.e., the number of consecutive HARQ DTX (Discontinuous Transmission)) reaches a maximum value (e.g., a maximum value of 4, 5, etc.), the terminal determines that the first sidelink carrier is unavailable, i.e., the first sidelink carrier is in an unavailable state.

[0074] If on one or more second sidelink carriers, the terminal detects that the number of times it has not received PSFCH signaling at the PSFCH reception opportunity (i.e., the number of consecutive HARQ DTXs) ​​has not reached the maximum value, then the terminal determines that the second sidelink carrier is available, that is, the second sidelink carrier is in an available state. The terminal sends a first message to the base station carrying information related to the unavailability of the first sidelink carrier, and the first message includes a SidelinkUEInformationNR message, a MAC (Media Access Control, through the media access control layer) CE (Control Element, control unit) and other messages.

[0075] The base station can promptly learn that one or more sidelink carriers (first sidelink carriers) of the terminal are unavailable based on the information related to the unavailability of the first sidelink carrier, and deactivate or release the sidelink communication transmission resources allocated to the terminal on the unavailable sidelink carrier. After the resources are released by the terminal, the base station can allocate these resources to other terminals in need, thereby avoiding resource waste. After the resources are deactivated, they can be activated again as needed.

[0076] The information related to the first sidelink carrier unavailability includes at least one of: sidelink carrier unavailability indication information, a destination identifier corresponding to the first sidelink carrier, frequency information of the first sidelink carrier, etc. The first sidelink carrier unavailability indication information is used to indicate that the number of consecutive HARQ DTXs on a specific sidelink carrier has reached a maximum value; the base station may determine that one or more sidelink carriers of the terminal are unavailable based on the sidelink carrier unavailability indication information.

[0077] The destination identifier corresponding to the first side link carrier refers to the destination identifier corresponding to the maximum number of consecutive HARQ DTXs, and the destination identifier can be a variety of identifiers, such as the MAC address of the peer terminal, layer 2 ID, etc.; the base station can determine that one or more side link carriers corresponding to the destination identifier are unavailable based on the destination identifier corresponding to the first side link carrier.

[0078] The frequency information of the first sidelink carrier may be a frequency index, a carrier index, etc. of the first sidelink carrier; the base station may determine that the sidelink carrier corresponding to the frequency information of the first sidelink carrier is unavailable based on the frequency information of the first sidelink carrier.

[0079] FIG2 is a schematic diagram of a process of clearing a sidelink grant in some embodiments of the sidelink carrier indication method according to the present disclosure, as shown in FIG2 :

[0080] Step 201: The terminal receives sidelink grant deactivation indication information sent by a base station.

[0081] In some embodiments, a terminal receives a message such as a DCI (Downlink Control Information) message sent by a base station and carrying sidelink grant deactivation indication information. The sidelink grant deactivation indication information can be a variety of information, used to instruct the terminal to clear the configured sidelink grant information corresponding to the first sidelink carrier.

[0082] The terminal may also receive sidelink carrier release indication information sent by the base station. The base station may use RRC (Radio Resource Control) signaling or the like to carry the sidelink carrier release indication information.

[0083] Step 202: The terminal clears the configured sidelink grant information corresponding to the first sidelink carrier according to the sidelink grant deactivation indication information.

[0084] In some embodiments, the sidelink grant deactivation indication information may include information such as frequency information of the first sidelink carrier. The sidelink grant is used to indicate communication resources of the first sidelink carrier, and may include communication resources such as time-frequency resources for the first sidelink carrier configured by the base station for the terminal.

[0085] The terminal deactivates the configured sidelink authorization corresponding to the first sidelink carrier based on the sidelink authorization deactivation indication information. For example, the terminal clears the authorization information (sidelink authorization information) for communication resources such as time-frequency resources, and retains the configuration information for communication resources such as time-frequency resources corresponding to the first sidelink carrier. When the sidelink authorization is reactivated, the terminal generates authorization information (sidelink authorization information) for communication resources such as time-frequency resources based on the configuration information for communication resources such as time-frequency resources.

[0086] Upon receiving the sidelink carrier release indication information sent by the base station, the terminal releases the configured sidelink grant corresponding to the first sidelink carrier according to the sidelink carrier release indication information. The terminal may clear the configured sidelink grant corresponding to the first sidelink carrier and release the corresponding configuration, which is the configuration of communication resources such as time-frequency resources corresponding to the first sidelink carrier.

[0087] For example, the terminal clears the authorization information (sidelink authorization information) for communication resources such as time-frequency resources based on the sidelink carrier release indication information. At the same time, the terminal clears the configuration information of communication resources such as time-frequency resources corresponding to the first sidelink carrier, and releases the configured time-frequency resources and other communication resources corresponding to the first sidelink carrier, that is, releases the configuration corresponding to the sidelink authorization.

[0088] The terminal may deactivate and release the configured sidelink grant corresponding to the first sidelink carrier when receiving sidelink grant deactivation indication information and sidelink carrier release indication information sent by the base station; the terminal may also deactivate and release the configured sidelink grant corresponding to the first sidelink carrier when not receiving sidelink grant deactivation indication information and sidelink carrier release indication information sent by the base station. Relevant deactivation and release methods may be used.

[0089] For example, after or before sending information related to the unavailability of the first sidelink carrier to the base station, the terminal deactivates the configured sidelink authorization corresponding to the first sidelink carrier without receiving the sidelink authorization deactivation indication information sent by the base station.

[0090] In some embodiments, as shown in FIG3 , terminal 32 and terminal 33 are sidelink multi-carrier terminals. Terminal 32 and terminal 33 (peer terminals) communicate simultaneously using two sidelink carriers, namely, near-field communication carrier 1 and near-field communication carrier 2. Terminal 32 monitors near-field communication carrier 1 and near-field communication carrier 2. When terminal 32 detects that near-field communication carrier 1 (a first sidelink carrier) is unavailable and near-field communication carrier 2 (a second sidelink carrier) is available, terminal 32 sends information related to the unavailability of the first sidelink carrier to base station 31.

[0091] In some embodiments, carriers used for data transmission between the terminal and the peer terminal include a first sidelink carrier and a second sidelink carrier. The terminal sends information related to unavailability of the second sidelink carrier to the peer terminal, so that the peer terminal determines whether to monitor the first sidelink carrier based on the information related to unavailability of the second sidelink carrier.

[0092] The terminal sends a second message carrying information related to unavailability of a second sidelink carrier to the peer terminal. The second message includes a PC5 (PC5 interface is a terminal-to-terminal direct communication interface) RRC message, a PC5-S message, a discovery message, etc. The information related to unavailability of the second sidelink carrier includes at least one of: sidelink carrier unavailability indication information, frequency information of the first sidelink carrier, and the like.

[0093] FIG4 is a flow chart of other embodiments of the sidelink carrier indication method according to the present disclosure, as shown in FIG4 :

[0094] In step 401, the MAC entity determines that a sidelink carrier is unavailable. For a specific destination (peer terminal), when the MAC entity of the sidelink multi-carrier terminal detects that the number of times the MAC entity fails to receive PSFCH signaling at a PSFCH reception opportunity (i.e., the number of consecutive HARQ DTXs) ​​on a certain sidelink carrier (a first sidelink carrier) reaches a maximum, the terminal (MAC entity) determines that the sidelink carrier is unavailable.

[0095] On other sidelink carriers (second sidelink carriers), when the MAC entity monitors that the number of times it has not received PSFCH signaling at the PSFCH reception opportunity (the number of consecutive HARQ DTXs) ​​has not reached the maximum value, the terminal (MAC entity) determines that other sidelink carriers are available.

[0096] In step 402, the MAC entity indicates to the terminal's upper layer that a sidelink carrier is unavailable. The MAC entity indicates to the terminal's upper layer that a certain sidelink carrier (a first sidelink carrier) is unavailable, meaning that the number of consecutive HARQ DTXs for this particular carrier has reached a maximum. The terminal's upper layer may be an RRC layer, PC5 signaling layer, short range service layer, or V2X layer.

[0097] Step 403: Send information related to the unavailability of the first sidelink carrier. The terminal sends information related to the unavailability of the first sidelink carrier to the base station. The information related to the unavailability of the first sidelink carrier includes: sidelink carrier unavailability indication information, a destination identifier corresponding to the first sidelink carrier, and frequency information of the first sidelink carrier.

[0098] Step 404: Send deactivation indication information or sidelink carrier release indication information. The base station sends L1 signaling carrying sidelink grant deactivation indication information to the terminal, instructing the terminal to deactivate the configured sidelink grant corresponding to the unavailable sidelink carrier (the first sidelink carrier); or, the base station sends RRC signaling carrying sidelink carrier release indication information to the terminal, instructing the terminal to release the configured sidelink grant corresponding to the unavailable sidelink carrier.

[0099] Step 405: Deactivate or release the sidelink grant. The terminal deactivates or releases the configured sidelink grant corresponding to the unavailable sidelink carrier (the first sidelink carrier) based on the sidelink grant deactivation indication information, and the terminal no longer attempts to send data on the resources indicated by the sidelink grant.

[0100] The terminal sends information related to the unavailability of the second sidelink carrier to the peer terminal; if the peer terminal does not conduct near-field communication with any other terminal except the terminal on this unavailable sidelink carrier (first sidelink carrier), the peer terminal no longer monitors the sidelink control information on this unavailable sidelink carrier (first sidelink carrier).

[0101] FIG5 is a schematic diagram of a process of communicating with a peer terminal in some embodiments of the sidelink carrier indication method according to the present disclosure, as shown in FIG5 :

[0102] In step 501, the MAC entity determines that a sidelink carrier is unavailable. For a specific destination (peer terminal), when the MAC entity of the sidelink multi-carrier terminal detects that the number of times the MAC entity fails to receive PSFCH signaling at a PSFCH reception opportunity (i.e., the number of consecutive HARQ DTXs) ​​on a certain sidelink carrier (a first sidelink carrier) reaches a maximum, the terminal (MAC entity) determines that the sidelink carrier is unavailable.

[0103] On other sidelink carriers (second sidelink carriers), when the MAC entity monitors that the number of times it has not received PSFCH signaling at the PSFCH reception opportunity (the number of consecutive HARQ DTXs) ​​has not reached the maximum value, the terminal (MAC entity) determines that other sidelink carriers are available.

[0104] In step 502, the MAC entity indicates to the upper layer of the terminal that the sidelink carrier is unavailable. The MAC entity indicates to the upper layer of the terminal that a certain sidelink carrier (first sidelink carrier) is unavailable, that is, the number of consecutive HARQ DTXs for this specific carrier has reached the maximum value; the upper layer of the terminal may be the RRC layer, PC5 signaling layer, short distance service layer, or V2X layer, etc. The MAC entity may also send the frequency information of this sidelink carrier (first sidelink carrier) and the related destination identifier to the upper layer of the terminal; the frequency information may be a frequency index, ARFCN (Absolute Radio Frequency Channel Number) or carrier index, etc.

[0105] Step 503: Send information related to a second sidelink carrier unavailability. The terminal sends information related to a second sidelink carrier unavailability to the peer terminal. The second sidelink carrier unavailability information includes: sidelink carrier unavailability indication information and frequency information of the sidelink carrier (the first sidelink carrier). The terminal can send the information related to the second sidelink carrier unavailability via a PC5 RRC message, a PC5-S message, a discovery message, or other similar message.

[0106] Step 504: Stop monitoring the sidelink control information. If the peer terminal does not communicate with any other terminal besides the terminal on the unavailable sidelink carrier (the first sidelink carrier), the peer terminal no longer monitors the sidelink control information on the unavailable sidelink carrier (the first sidelink carrier).

[0107] FIG6 is a flow chart of further embodiments of the sidelink carrier indication method according to the present disclosure, as shown in FIG6 :

[0108] Step 601: A base station receives information related to unavailability of a first sidelink carrier from a terminal. When the terminal detects that at least one first sidelink carrier is unavailable and at least one second sidelink carrier is available, the terminal sends information related to unavailability of the first sidelink carrier.

[0109] In some embodiments, the base station sends sidelink grant deactivation indication information or sidelink carrier release information to the terminal. The terminal deactivates the configured sidelink grant corresponding to the first sidelink carrier according to the sidelink grant deactivation indication information, or releases the configured sidelink grant corresponding to the first sidelink carrier according to the sidelink carrier release indication information.

[0110] In the side link carrier indication method in the above embodiment, when the terminal monitors that at least one first side link carrier is unavailable and at least one second side link carrier is available, the terminal sends information related to the unavailability of the first side link carrier to the base station, so that the base station can promptly know that the side link carrier of the terminal is unavailable, and can release the side link communication sending resources allocated to the terminal on this unavailable carrier. The released resources can be allocated to other terminals in need, which can save resources; the peer terminal conducting near-field communication with the terminal can promptly know that the side link carrier is unavailable, and will no longer monitor the side link control information on this unavailable carrier subsequently, which can save terminal power.

[0111] In some embodiments, as shown in Figure 7, the present disclosure provides a terminal 70, including a carrier status sending module 71. When the carrier status sending module 71 monitors that at least one first side link carrier is unavailable and at least one second side link carrier is available, it sends information related to the unavailability of the first side link carrier to the base station.

[0112] In some embodiments, the carrier status sending module 71 sends a first message carrying information related to unavailability of the first sidelink carrier to the base station, where the first message includes: a SidelinkUEInformationNR message, a MAC CE message, and the like.

[0113] The terminal 70 includes an indication information receiving module 72 and a sidelink processing module 73. The indication information receiving module 72 receives the sidelink authorization deactivation indication information or the sidelink carrier release information sent by the base station; the sidelink processing module 73 deactivates the configured sidelink authorization information corresponding to the first sidelink carrier according to the sidelink authorization deactivation indication information.

[0114] In some embodiments, the indication information receiving module 72 is configured to receive L1 signaling sent by a base station and carrying sidelink grant deactivation indication information, or receive RRC signaling sent by the base station and carrying sidelink carrier release information. The sidelink processing module 73 deactivates or releases the configured sidelink grant corresponding to the first sidelink carrier.

[0115] In some embodiments, carrier status sending module 71 sends information related to the unavailability of the second sidelink carrier to the peer terminal, so that the peer terminal determines whether to monitor the first sidelink carrier based on the information related to the unavailability of the second sidelink carrier. For example, carrier status sending module 71 sends a second message carrying information related to the unavailability of the second sidelink carrier to the peer terminal. The second message includes a PC5 RRC message, a PC5-S message, a discovery message, or other such message.

[0116] When the number of consecutive hybrid automatic repeat request discontinuous transmission (HARQ DTX) on the first sidelink carrier reaches a maximum value, the carrier status sending module 71 indicates to the terminal upper layer through the MAC entity of the terminal that the first sidelink carrier is unavailable. When the number of consecutive HARQ DTX on the second sidelink carrier does not reach a maximum value, the carrier status sending module 71 determines that the second sidelink carrier is available.

[0117] In some embodiments, as shown in FIG8 , the terminal may include a memory 75, a processor 76, a communication interface 77, and a bus 78. The memory 75 is used to store instructions, and the processor 76 is coupled to the memory 75. The processor 76 is configured to execute the above-mentioned sidelink carrier indication method performed by the terminal based on the instructions stored in the memory 75.

[0118] Memory 75 can be high-speed RAM, non-volatile memory, or a memory array. Memory 75 can also be divided into blocks, and the blocks can be combined into virtual volumes according to certain rules. Processor 76 can be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the disclosed sidelink carrier indication method performed by a terminal.

[0119] In some embodiments, as shown in FIG9 , the present disclosure provides a base station 80 including a carrier status receiving module 81 configured to receive information related to first sidelink carrier unavailability sent by a terminal. Upon detecting that at least one first sidelink carrier is unavailable and at least one second sidelink carrier is available, the terminal transmits information related to first sidelink carrier unavailability.

[0120] The base station 80 includes an indication information sending module 82, which sends sidelink grant deactivation indication information or sidelink carrier release information to the terminal. Based on the sidelink grant deactivation indication information, the terminal clears the configured sidelink grant information corresponding to the first sidelink carrier. Alternatively, based on the sidelink carrier release indication information, the terminal clears the configured sidelink grant corresponding to the first sidelink carrier and releases the corresponding configuration. For example, the indication information sending module 82 sends L1 signaling carrying the sidelink grant deactivation indication information or RRC signaling carrying the sidelink carrier release information to the terminal.

[0121] In some embodiments, as shown in Figure 10, the base station may include a memory 83, a processor 84, a communication interface 85, and a bus 86. The memory 83 is used to store instructions, and the processor 84 is coupled to the memory 83. The processor 84 is configured to execute the above-mentioned sidelink carrier indication method performed by the base station based on the instructions stored in the memory 83.

[0122] Memory 83 can be high-speed RAM, non-volatile memory, or a memory array. Memory 83 can also be divided into blocks, and the blocks can be combined into virtual volumes according to certain rules. Processor 84 can be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the disclosed sidelink carrier indication method performed by a terminal.

[0123] In some embodiments, the present disclosure provides a communication system, including: a terminal as described in any of the above embodiments, and a base station as described in any of the above embodiments. The communication system may be a fifth-generation mobile communication technology 5G system, a sixth-generation mobile communication technology 6G system, etc.

[0124] In some embodiments, the present disclosure provides a computer-readable storage medium storing computer instructions. When the instructions are executed by a processor, the method in any of the above embodiments is implemented.

[0125] Computer readable storage media can adopt any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can, for example, include but is not limited to a system, device or component of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination thereof. More specific examples (non-exhaustive enumeration) of readable storage media can include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0126] In some embodiments, the present disclosure provides a computer program, comprising: instructions, which, when executed by a processor, cause the processor to perform the method of any of the above embodiments.

[0127] The embodiments of the present disclosure may also be a computer program product, which includes computer program instructions. When the computer program instructions are executed by a processor, the processor executes the steps of the method according to various embodiments of the present disclosure described in the above “Exemplary Method” section of this specification.

[0128] The side link carrier indication method, terminal, base station, storage medium and computer program in the above-mentioned embodiments, when the terminal monitors that at least one first side link carrier is unavailable and at least one second side link carrier is available, sends information related to the unavailability of the first side link carrier to the base station, so that the base station can promptly know that the side link carrier of the terminal is unavailable, and can release the side link communication sending resources allocated to the terminal on this unavailable carrier. The released resources can be allocated to other terminals in need, which can save resources; the peer terminal that conducts near-field communication with the terminal can promptly know that the side link carrier is unavailable, and will no longer monitor the side link control information on this unavailable carrier subsequently, which can save terminal power and improve the user experience.

[0129] The basic principles of the present disclosure have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in this disclosure are merely illustrative and not restrictive, and should not be construed as necessarily possessed by each embodiment of the present disclosure. Furthermore, the specific details disclosed above are provided for illustrative purposes and to facilitate understanding, rather than as limitations. These details do not limit the present disclosure to necessarily being implemented using these specific details.

[0130] Each embodiment in this specification is described in a progressive manner, with each embodiment focusing on its differences from the other embodiments. References to the same or similar parts between the various embodiments are sufficient. For system embodiments, since they largely correspond to method embodiments, their description is relatively simple. For relevant parts, references to the description of the method embodiments are sufficient.

[0131] The block diagrams of the devices, devices, equipment, and systems involved in this disclosure are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, or configured in any manner. Words such as "include," "comprise," "have," and the like are open-ended words, meaning "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and / or" and can be used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

[0132] It should also be noted that in the apparatus, device, and method of the present disclosure, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present disclosure.

[0133] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present disclosure. Therefore, the present disclosure is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0134] The above description has been provided for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present disclosure to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, it will be understood by those skilled in the art that the above embodiments are merely illustrative and do not limit the scope of the present disclosure. It will be understood by those skilled in the art that the above embodiments may be combined, modified, or replaced without departing from the scope and essence of the present disclosure.

Claims

1. A sidelink carrier indication method, applied to a terminal, the method comprising: In case that it is monitored that at least one first sidelink carrier is unavailable and at least one second sidelink carrier is available, information related to unavailability of the first sidelink carrier is sent to the base station.

2. The sidelink carrier indication method according to claim 1, further comprising: Deactivate or release the configured sidelink grant corresponding to the first sidelink carrier.

3. The sidelink carrier indication method according to claim 2, further comprising: Receiving sidelink authorization deactivation indication information sent by the base station; clearing, according to the sidelink authorization deactivation indication information, the configured sidelink authorization information corresponding to the first sidelink carrier; Alternatively, receiving side link carrier release indication information sent by the base station; and according to the side link carrier release indication information, clearing the configured side link authorization information corresponding to the first side link carrier and releasing the corresponding configuration.

4. The sidelink carrier indication method according to claim 3, wherein: The receiving the sidelink grant deactivation indication information sent by the base station includes: receiving L1 signaling sent by the base station and carrying the sidelink grant deactivation indication information; or, Receive RRC signaling sent by the base station and carrying the sidelink carrier release information.

5. The sidelink carrier indication method according to any one of claims 1 to 4, wherein: The sending of information related to unavailability of the first sidelink carrier to the base station includes: Send a SidelinkUEInformationNR message or a MAC CE carrying information related to the unavailability of the first sidelink carrier to the base station.

6. The sidelink carrier indication method according to any one of claims 1 to 5, wherein: The information related to the unavailability of the first sidelink carrier includes at least one of: sidelink carrier unavailability indication information, a destination identifier corresponding to the first sidelink carrier, and frequency information of the first sidelink carrier.

7. The sidelink carrier indication method according to any one of claims 1 to 6, further comprising: The second sidelink carrier unavailability related information is sent to the peer terminal.

8. The sidelink carrier indication method according to claim 7, wherein: The sending of the second sidelink carrier unavailability related information to the peer terminal includes: A second message carrying information related to unavailability of the second sidelink carrier is sent to the peer terminal; wherein the second message includes at least one of a PC5 RRC message, a PC5-S message, and a discovery message.

9. The sidelink carrier indication method according to claim 7 or 8, wherein: The second sidelink carrier unavailability related information includes: at least one of sidelink carrier unavailability indication information and frequency information of the first sidelink carrier.

10. The sidelink carrier indication method according to any one of claims 1 to 9, further comprising: When the number of continuous hybrid automatic repeat request discontinuous transmission HARQ DTX on the first sidelink carrier reaches a maximum value, the MAC entity of the terminal indicates to the upper layer of the terminal that the first sidelink carrier is unavailable.

11. The sidelink carrier indication method according to any one of claims 1 or 10, further comprising: In a case where the number of consecutive HARQ DTX times on the second sidelink carrier does not reach a maximum value, it is determined that the second sidelink carrier is available.

12. A sidelink carrier indication method, applied to a base station, the method comprising: Receiving information related to unavailability of the first sidelink carrier sent by the terminal; Wherein, when the terminal monitors that at least one first sidelink carrier is unavailable and at least one second sidelink carrier is available, the terminal sends information related to unavailability of the first sidelink carrier.

13. The sidelink carrier indication method according to claim 12, further comprising: Sending sidelink authorization deactivation indication information or sidelink carrier release information to the terminal; The terminal clears the configured side link authorization corresponding to the first side link carrier according to the side link authorization deactivation indication information; or, the terminal clears the configured side link authorization information corresponding to the first side link carrier and releases the corresponding configuration according to the side link carrier release indication information.

14. The sidelink carrier indication method according to claim 13, wherein: The sending of the sidelink authorization deactivation indication information to the terminal includes: An L1 signaling carrying the sidelink grant deactivation indication information, or an RRC signaling carrying the sidelink carrier release information is sent to the terminal.

15. The sidelink carrier indication method according to any one of claims 12 to 14, wherein: The information related to the unavailability of the first sidelink carrier includes at least one of: sidelink carrier unavailability indication information, a destination identifier corresponding to the first sidelink carrier, and frequency information of the first sidelink carrier.

16. A terminal, comprising: The carrier status sending module is used to send information related to the unavailability of the first sidelink carrier to the base station when it is monitored that at least one first sidelink carrier is unavailable and at least one second sidelink carrier is available.

17. The terminal according to claim 16, further comprising: a sidelink processing module, configured to process a configured sidelink grant corresponding to the first sidelink carrier; Deactivate or release the line.

18. The terminal according to claim 17, further comprising: An indication information receiving module, used to receive sidelink authorization deactivation indication information or sidelink carrier release information sent by the base station; The sidelink processing module is used to clear the configured sidelink authorization corresponding to the first sidelink carrier according to the sidelink authorization deactivation indication information; or, to clear the configured sidelink authorization information corresponding to the first sidelink carrier and release the corresponding configuration according to the sidelink carrier release indication information.

19. The terminal according to claim 18, wherein: The indication information receiving module is used to receive L1 signaling sent by the base station and carrying the sidelink authorization deactivation indication information, or to receive RRC signaling sent by the base station and carrying the sidelink carrier release information.

20. The terminal according to any one of claims 16 to 19, wherein: The carrier status sending module is used to send a SidelinkUEInformationNR message or MAC CE carrying information related to the unavailability of the first sidelink carrier to the base station.

21. The terminal according to any one of claims 16 to 20, wherein: The information related to the unavailability of the first sidelink carrier includes at least one of: sidelink carrier unavailability indication information, a destination identifier corresponding to the first sidelink carrier, and frequency information of the first sidelink carrier.

22. The terminal according to any one of claims 16 to 21, wherein: The carrier status sending module is used to send the second sidelink carrier unavailability related information to the peer terminal.

23. The terminal according to claim 22, wherein: The carrier status sending module is used to send a second message carrying information related to the unavailability of the second sidelink carrier to the peer terminal; wherein the second message includes: at least one of: a PC5 RRC message, a PC5-S message, and a discovery message.

24. The terminal according to claim 22 or 23, wherein: The second sidelink carrier unavailability related information includes: at least one of sidelink carrier unavailability indication information and frequency information of the first sidelink carrier.

25. The terminal according to any one of claims 16 to 24, wherein: The carrier state sending module is used to indicate to the terminal upper layer through the terminal's MAC entity when the number of continuous hybrid automatic repeat request discontinuous transmission HARQ DTX on the first sidelink carrier reaches a maximum value. The first sidelink carrier is unavailable.

26. The terminal according to any one of claims 16 to 25, wherein: The carrier status sending module is used to determine that the second sidelink carrier is available when the number of consecutive HARQ DTX times on the second sidelink carrier does not reach a maximum value.

27. A terminal, comprising: Memory; and a processor coupled to the memory, wherein the processor is configured to execute the method according to any one of claims 1 to 11 based on instructions stored in the memory.

28. A base station, comprising: A carrier status receiving module is used to receive information related to the unavailability of a first sidelink carrier sent by a terminal; wherein the terminal sends information related to the unavailability of the first sidelink carrier when it monitors that at least one first sidelink carrier is unavailable and at least one second sidelink carrier is available.

29. The base station of claim 28, further comprising: An indication information sending module, used to send sidelink authorization deactivation indication information or sidelink carrier release information to the terminal; The terminal clears the configured side link authorization corresponding to the first side link carrier according to the side link authorization deactivation indication information; or, the terminal clears the configured side link authorization information corresponding to the first side link carrier and releases the corresponding configuration according to the side link carrier release indication information.

30. The base station according to claim 29, wherein: The indication information sending module is used to send L1 signaling carrying the sidelink grant deactivation indication information or RRC signaling carrying the sidelink carrier release information to the terminal.

31. The method of any one of claims 28 to 30, wherein: The information related to the unavailability of the first sidelink carrier includes at least one of: sidelink carrier unavailability indication information, a destination identifier corresponding to the first sidelink carrier, and frequency information of the first sidelink carrier.

32. A base station, comprising: Memory; and a processor coupled to the memory, the processor being configured to execute the method according to any one of claims 12 to 15 based on instructions stored in the memory.

33. A communication system comprising: The terminal according to any one of claims 16 to 27, and the base station according to any one of claims 28 to 32.

34. A computer-readable storage medium storing computer instructions, wherein the instructions are executed by a processor to perform the method according to any one of claims 1 to 15.

35. A computer program comprising: Instructions, when executed by a processor, cause the processor to perform the data transmission method according to any one of claims 1 to 15.

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