Sidelink carrier management method, apparatus, and system

Abstract

The application provides a sidelink carrier management method, device and system. The method comprises: a first communication device acquiring configuration information of a plurality of sidelink (SL) carriers; the first communication device determining at least one SL carrier from the plurality of SL carriers; and the first communication device sending a first message to a second communication device, wherein the first message comprises information of the at least one SL carrier. The sidelink carrier management method provided by the application determines at least one SL carrier for a single connection by a sending end communication device, and indicates the at least one SL carrier to a receiving end communication device, thereby achieving instant and effective management of the SL carrier, and improving the efficiency of SL carrier communication and system capacity.

Description

Technical Field

[0001] This application relates to the field of communications, and more specifically, to sidelink carrier management methods, apparatus, and systems in the field of communications. Background Technology

[0002] In wireless communication systems, two communication devices can communicate via a network or directly via a sidelink (SL) carrier without the need for a network. A typical application scenario for SL communication is vehicle-to-everything (V2X). In V2X, each vehicle is a communication device, and two vehicles can transmit data directly via SL without going through a network, thus effectively reducing communication latency.

[0003] Current communication between devices supports single-carrier (SL) communication, meaning one device can only send data to another using a single SL carrier. However, the data rate supported by a single carrier is limited, resulting in relatively low transmission efficiency. Therefore, multi-carrier communication schemes have been introduced into the field of communication to improve data transmission rates.

[0004] In Long Term Evolution (LTE) systems, V2X uses carrier aggregation (CA) for multi-carrier communication. However, LTE only supports broadcast communication on SL carriers, so it employs an intra-carrier closed-loop design to ensure compatibility with older communication devices. Therefore, SL multi-carrier communication in LTE does not support cross-carrier scheduling; that is, transmission on each carrier on the SL is independent. For example, user equipment (UE) 1 and UE 2 communicate via SL component carrier (CC) 1 and SL CC2. The location of data on SL CC1 is indicated by sidelink control information (SCI), and the location of data on SL CC2 is indicated by SCI. The UE needs to monitor the transmission channel on each carrier to know the location of all possible data.

[0005] New radio (NR) systems support unicast communication on SL carriers. If the closed-loop design within the carrier continues, the transmission efficiency will be low. Furthermore, because the base station cannot sense the communication status between communication devices, it cannot manage the SL carrier in a timely and accurate manner, thus affecting the transmission efficiency between communication devices.

[0006] Therefore, for SL unicast communication, how to achieve timely and effective management of SL carriers and improve the transmission efficiency between communication devices is an urgent problem to be solved. Summary of the Invention

[0007] This application provides a sidelink carrier management method, apparatus, and system that can realize real-time and effective management of SL carriers, thereby improving the efficiency of SL carrier communication and system capacity.

[0008] In a first aspect, a method for managing sidelink carriers is provided. This method is performed by a first communication device, which may be, for example, a transmitting user equipment (UE) in a unicast connection. The method includes: the first communication device acquiring configuration information of a plurality of sidelink SL carriers; the first communication device determining at least one SL carrier from the plurality of SL carriers; and the first communication device sending a first message to a second communication device, the first message including information about the at least one SL carrier.

[0009] Through the above technical solution, the first communication device first acquires available SL resources, then determines at least one SL carrier from these SL resources as a communication carrier, and then indicates the at least one SL carrier to the second communication device, which is the peer communication device of the first communication device in a unicast connection. Since the first communication device can directly perceive the link status of its unicast connection with the second communication device, the management of the SL carrier of the unicast connection by the first communication device is more timely and effective, which is conducive to improving the efficiency of SL carrier communication and system capacity.

[0010] Optionally, the configuration information of the plurality of SL carriers includes carrier frequency information, resource pool configuration information, and at least one of subcarrier spacing, bandwidth, and synchronization configuration information of the plurality of SL carriers.

[0011] Optionally, the first communication device obtains the configuration information of multiple SL carriers of the sidelink SL by: the first communication device obtaining the configuration information of the multiple SL carriers from the base station through dedicated signaling, the dedicated signaling including radio resource control (RRC); or, the first communication device obtaining the configuration information of the multiple SL carriers by listening to system broadcasts; or, the first communication device obtaining the configuration information of the multiple SL carriers through pre-configuration information.

[0012] Optionally, the first communication device determines at least one SL carrier from the plurality of SL carriers by: the first communication device determining the at least one SL carrier according to the indication information sent by the base station; or, the first communication device determining the at least one SL carrier itself according to a preset rule.

[0013] It should be understood that the first communication device may be a communication device in a connected state (e.g., RRC connected state) or a communication device in a disconnected state (e.g., idle state, inactive state, or wireless link failure state).

[0014] It should be understood that the first communication device can have multiple unicast connections, in which case the first communication device can determine at least one SL carrier for each unicast connection. It should also be understood that the at least one SL carrier determined by the first communication device for each unicast connection can be the same or different. For example, different preset rules can be determined for each unicast connection based on its Quality of Service (QoS), and the first communication device determines at least one SL carrier for each unicast connection accordingly based on these different preset rules. Alternatively, the same preset rule can be used to determine at least one SL carrier for each unicast connection, specifically, for example, RSRP greater than or equal to a threshold. Then, different thresholds are determined for each unicast connection based on its QoS, and the first communication device determines at least one SL carrier for each unicast connection accordingly based on the preset rules and these different thresholds.

[0015] In conjunction with the first aspect, in a first possible implementation of the first aspect, the first communication device determines at least one SL carrier from the plurality of SL carriers, including: the first communication device determines one SL carrier as a master carrier PCC from the plurality of SL carriers.

[0016] It should be understood that when the first communication device obtains SL resources through the base station, the base station may send configuration information of multiple SL carriers to the first communication device while simultaneously indicating the PCC information to the first communication device, or it may send the configuration information of the multiple SL carriers first and then indicate the PCC to the first communication device.

[0017] In conjunction with the first possible implementation of the first aspect, in the second possible implementation of the first aspect, the first communication device determines at least one SL carrier from the plurality of SL carriers, and further includes: the first communication device determines at least one SL carrier as a secondary carrier SCC from the plurality of SL carriers, the PCC carrying control information, the control information being used to schedule resources for transmitting data on the SCC.

[0018] Through the above technical solution, the first communication device determines one PCC and at least one SCC from multiple SL carriers. The PCC carries control information for scheduling resources used to transmit data on the SCC. Therefore, the first communication device can send control information on the PCC to indicate the time-frequency resources where the data on the SCC is located, thereby achieving cross-carrier scheduling and improving transmission efficiency. Simultaneously, the first communication device can determine the location of all possible data simply by monitoring the PDCCH on the PCC, effectively reducing the power consumption of the communication device.

[0019] In conjunction with the first aspect or any of the first to second possible implementations of the first aspect, in a third possible implementation of the first aspect, the first communication device determines at least one SL carrier from the plurality of SL carriers, comprising: the first communication device receiving a second message sent by a base station, the second message including information about the at least one SL carrier; and the first communication device determining the at least one SL carrier based on the second message.

[0020] Optionally, before the first communication device receives the second message sent by the base station, the first communication device sends a request message to the base station, the request message being used to request SL resource information from the base station.

[0021] Optionally, the request information includes service information of the first communication device, which is used to indicate the service requirements of the first communication device. For example, the service information includes the service unicast connection identifier (destination layer 2 identifier) ​​of the first communication device, and frequency requirement range, QoS requirements, propagation type (unicast, broadcast or multicast), etc.

[0022] In conjunction with the first aspect or any of the first to second possible implementations of the first aspect, in a fourth possible implementation of the first aspect, the first communication device determines at least one SL carrier from the plurality of SL carriers, including: the first communication device determines at least one SL carrier from the plurality of SL carriers that satisfies a first preset rule.

[0023] In conjunction with the fourth possible implementation of the first aspect, in the fifth possible implementation of the first aspect, the first preset rule includes: the reference signal received power RSPR is greater than a first threshold; and / or the channel busy ratio CBR is less than a second threshold.

[0024] In conjunction with the first aspect or any of the first to fifth possible implementations of the first aspect, in the sixth possible implementation of the first aspect, after the first communication device sends the first message to the second communication device, the method further includes: the first communication device acquiring link measurement information of a first SL carrier, wherein the first SL carrier is any one of the at least one SL carrier; and when the link measurement information of the first SL carrier does not meet the second preset rule, the first communication device updating the first SL carrier.

[0025] Through the above technical solution, the first communication device can promptly update the SL carriers that do not meet the preset rules by acquiring the link measurement information of at least one SL carrier, thereby realizing timely and effective management of SL carriers and improving communication quality.

[0026] Optionally, the second preset rule includes: the reference signal reception quality (RSRQ) is greater than a third threshold; and / or the channel busy ratio (CBR) is less than or equal to a fourth threshold; or, the second preset rule includes: RSRQ is greater than or equal to a third threshold, CBR is less than or equal to a fourth threshold, and there exists an SL carrier whose link measurement information satisfies the third preset rule; or, the third preset rule includes: RSRP is less than or equal to a fifth threshold and CBR is greater than or equal to a sixth threshold.

[0027] The first communication device updating the first SL carrier refers to the first communication device updating the SL carriers whose link measurement information satisfies the second preset rule among the at least one SL carriers. For example, after the first communication device obtains the link measurement information of the at least one SL carrier, it updates the SL carriers among the at least one SL carriers that satisfy the second preset rule. The update here means that the first communication device determines a new SL carrier among the multiple SL carriers obtained to replace the SL carrier that satisfies the second preset rule. The new SL carrier may be an SL carrier that satisfies the third preset rule.

[0028] Optionally, the first communication device may obtain the second preset rule according to a predefined method, or it may receive the second preset rule sent by the base station. When the first communication device obtains the second preset rule through the base station and obtains SL resources through the base station, the base station may send the second preset rule while sending configuration information of multiple SL carriers to the first communication device, or it may send the second preset rule after sending the configuration information of the multiple SL carriers.

[0029] The above technical solution enables real-time and effective management of SL carriers by using a transmitting end communication device to determine at least one SL carrier for a unicast connection and to indicate the at least one SL carrier to a receiving end communication device, thereby improving the efficiency of SL carrier communication and system capacity.

[0030] In conjunction with the sixth or seventh possible implementation of the first aspect, in the eighth possible implementation of the first aspect, the first communication device acquires the link measurement information of the first SL carrier, including: the first communication device monitors the link information of the first SL carrier to obtain first measurement information; and / or the first communication device receives second measurement information from the second communication device, the second measurement information being the link measurement information obtained by the second communication device monitoring the link information of the first SL carrier.

[0031] In conjunction with the first aspect or any of the first to seventh possible implementations of the first aspect, in the ninth possible implementation of the first aspect, the method further includes: the first communication device sending a third message to the base station, the third message including information about the at least one SL carrier.

[0032] Through the above technical solution, the first communication device reports at least one determined SL carrier to the base station, which is beneficial for the base station to manage the SL resources more timely and effectively when scheduling SL resources for the first communication device, thereby improving communication efficiency.

[0033] Optionally, the third message includes a unicast connection identifier, which is used to identify a unicast connection between the first communication device and the second communication device.

[0034] It should be understood that when the first communication device is connected to multiple unicast connections, the third message includes a unicast connection identifier for each unicast connection and an SL carrier corresponding to each unicast connection identifier.

[0035] Secondly, a method for determining HARQ feedback resources is provided, the method comprising: a first communication device sending first information to a second communication device at the location of a first physical side crosslink shared channel (PSSCH) resource, the location of the first PSSCH resource being on a first SCC, the first SCC being any SCC; the first communication device receiving hybrid automatic repeat request (HARQ) feedback information of the first information at the location of a first physical side crosslink feedback channel (PSFCH) resource, the location of the first PSSCH resource being determined based on the location of the first PSSCH resource, the location of the first PSSCH resource being on the first SCC.

[0036] By specifying the HARQ feedback resource location for transmitted data on different secondary carriers, the communication device avoids being unable to determine the HARQ feedback resource location during multi-carrier communication, thus preventing a decrease in transmission efficiency.

[0037] It should be understood that the above technical solutions can be implemented independently in the corresponding multi-carrier scenarios, or they can be applied in the application scenarios of the aforementioned side-link carrier management method.

[0038] Thirdly, a method for determining HARQ feedback resources is provided, the method further comprising: a first communication device sending second information to a second communication device at the location of a second PSSCH resource, the location of the second PSSCH resource being on a second SCC, the second SCC being any one of the SCCs; the first communication device determining the location of a second PSFCH resource, the location of the second PSFCH resource being on the PCC; and the first communication device receiving HARQ feedback information of the second information at the location of the second PSFCH resource.

[0039] The above technical solution, by specifying that the HARQ feedback resource locations on both the PCC and SCC are on the PCC, avoids the problem of communication devices being unable to determine the HARQ feedback resource locations during multi-carrier communication, thus affecting transmission efficiency. Simultaneously, since the HARQ feedback resource locations on all carriers are on the PCC, the HARQ feedback results for all SL carriers can be determined simply by monitoring the PSFCH on the PCC, which helps reduce resource waste.

[0040] In conjunction with the third aspect, in a first possible implementation of the third aspect, the information of the at least one SL carrier includes the index of the second SCC and the identifier of the resource pool in which the second PSSCH is located.

[0041] In conjunction with the first possible implementation of the third aspect, in the second possible implementation of the third aspect, the first communication device determines the location of the second PSFCH resource by: the first communication device determining the location of the second PSFCH resource based on the location of the second PSFCH resource, and at least one of the index of the second SCC and the resource pool identifier of the second PSFCH resource; or the first communication device determining the location of the second PSFCH resource based on the location of the physical side link control channel PSCCH resource, wherein the PSCCH resource carries an SCI indicating the location of the second PSFCH resource, and the location of the PSCCH resource is on the PCC.

[0042] In conjunction with the second possible implementation of the third aspect, in the third possible implementation of the third aspect, the PSCCH resource and the second PSFCH resource are in the same resource pool.

[0043] Optionally, both the first resource and the second resource can be PSSCH resources. Alternatively, the first resource can be a PSSCH resource and the second resource can be a PSFCH resource.

[0044] It should be understood that when a transmitting communication device acquires SL resources for SL data transmission, it needs to decide which SL data to send using those SL resources. When the SL data to be sent belongs to a unicast connection, switch time limitations also need to be considered. For example, after the first communication device acquires the first and second SL resources, it performs logical channel prioritization (LCP) to determine the SL data to be sent first. When the SL data to be sent first belongs to a unicast connection, it needs to ensure that the switching time of both the first and second communication devices is less than the time interval between the first and second SL resources. The second communication device is the peer communication device of the first communication device in that unicast connection.

[0045] Fourthly, a communication method is provided, which can be executed, for example, by a base station or a transmitting communication device. The method includes: a first communication device determining a first switching time for switching between a first frequency band and a second frequency band, wherein the first frequency band and the second frequency band are respectively the frequency bands of the PCC and the third SCC, and the third SCC is any one of the SCCs; the first communication device receiving a fourth message sent by a second communication device, the fourth message including a second switching time, the second switching time being the time during which the second communication device switches between the first frequency band and the second frequency band; the first communication device determining a time interval not less than the maximum value of the first switching time and the second switching time, the time interval being the time interval between the end time of a first resource and the start time of a second resource, wherein the first resource belongs to the first frequency band, the second resource belongs to the second frequency band, and the first resource is prior to the timing of the second resource.

[0046] Optionally, when the base station executes the above technical solution, obtaining the first handover time and the second handover time includes: receiving first information sent by the first communication device, the first information including the first handover time and the second handover time.

[0047] Optionally, when the transmitting communication device of the unicast connection executes the above technical solution, obtaining the first switching time and the second switching time includes: determining the first switching time; receiving second information sent by the second communication device, the second information including the second switching time.

[0048] By introducing the switching time capability through the above technical solution, the transmission chain or receiver chain of the communication device can simultaneously support two frequency bands in a frequency band pair, thereby improving communication capability and avoiding the problem of limited communication device capability.

[0049] In conjunction with the fourth aspect, in a first possible implementation of the fourth aspect, the first resource includes resources used by the PSCCH, the second resource includes resources used by the PSSCH, and the SCI carried on the PSCCH is used to indicate the location of the resources used by the PSSCH.

[0050] Fifthly, a method for managing sidelink carriers is provided, the method comprising: a second communication device receiving a first message sent by a first communication device, the first message including configuration information of at least one sidelink SL carrier, the at least one SL carrier being determined by the first communication device from a plurality of SL carriers.

[0051] In conjunction with the fifth aspect, in the first possible implementation of the fifth aspect, when the first message includes configuration information of an SL carrier, the configuration information of the SL carrier is the configuration information of the main carrier PCC.

[0052] In conjunction with the fifth aspect, in the second possible implementation of the fifth aspect, when the first message includes configuration information for at least two SL carriers, the at least two SL carriers include a primary carrier PCC, and the SL carriers other than the PCC are secondary carriers SCC. The PCC carries control information, which is used to schedule the resources for transmitting data on the SCC.

[0053] In conjunction with the fifth aspect or any of the first to second possible implementations of the fifth aspect, in the third possible implementation of the fourth aspect, after the second user equipment (UE) receives the first message sent by the first communication device, the method further includes: the second communication device monitoring the link information of the first SL carrier to obtain second measurement information, wherein the first SL carrier is any one of the at least one SL carrier; the second communication device sending the second measurement information to the first communication device, wherein the second measurement information is used to instruct the first communication device to update the first SL carrier that does not meet the second preset rule.

[0054] In conjunction with the third possible implementation of the fifth aspect, in the fourth possible implementation of the fifth aspect, the second preset rule includes: the reference signal reception quality (RSRQ) is greater than a third threshold; and / or the received signal strength indication (RSSI) is greater than a fourth threshold.

[0055] A sixth aspect provides a method for determining HARQ feedback resources, the method comprising: a second communication device receiving first information sent by a first communication device at a location of a first physical link shared channel (PSSCH) resource, the location of the first PSSCH resource being on a first SCC, the first SCC being any SCC; the second communication device sending hybrid automatic repeat request (HARQ) feedback information of the first information at the location of the first PSFCH resource, the location of the first PSFCH resource being determined based on the location of the first PSSCH resource, the location of the first PSFCH resource being on the first SCC.

[0056] In conjunction with the sixth aspect, in a first possible implementation of the sixth aspect, the method further includes: the second communication device receiving second information sent by the first communication device at a location of a second physical side cross link shared channel (PSSCH) resource, the second PSSCH being on a second SCC, the second SCC being any one of the SCCs; the second communication device determining the location of a second PSFCH resource, the location of the second PSFCH resource being on the PCC; and the second communication device sending HARQ feedback information of the second information at the location of the second PSFCH resource.

[0057] In conjunction with the first possible implementation of the sixth aspect, in the second possible implementation of the sixth aspect, the information of the at least one SL carrier includes the index of the second SCC and the identifier of the resource pool in which the second PSSCH is located.

[0058] In conjunction with the second possible implementation of the sixth aspect, in the third possible implementation of the sixth aspect, the second communication device determines the location of the second PSFCH resource by: the second communication device determining the location of the PSFCH resource based on at least one of the location of the second PSSCH resource, the index of the second SCC, and the resource pool identifier of the second PSSCH resource; or the second communication device determining the location of the second PSFCH resource based on the location of the physical side link control channel PSCCH resource, wherein the PSCCH resource carries an SCI indicating the location of the second PSSCH resource, and the location of the PSCCH resource is on the PCC.

[0059] In conjunction with the third possible implementation of the sixth aspect, in the fourth possible implementation of the sixth aspect, the PSCCH resource and the second PSFCH resource are in the same resource pool.

[0060] A seventh aspect provides a communication method, the method comprising: a second communication device determining a second switching time for switching between a first frequency band and a second frequency band, the first frequency band and the second frequency band being frequency bands of a PCC and a third SCC, respectively, the third SCC being any SCC; the second communication device sending a fourth message to a first communication device, the fourth message including the second switching time; the second communication device transmitting messages with the first communication device to a first resource and a second resource, the first resource belonging to the first frequency band, the second resource belonging to the second frequency band, and the time interval between the end time of the first resource and the start time of the second resource being not less than the maximum value of the first switching time and the second switching time, the first switching time being the time for the first communication device to switch between the first frequency band and the second frequency band.

[0061] In conjunction with the seventh aspect, in a first possible implementation of the seventh aspect, the first resource includes resources used by the PSSCH, the second resource includes resources used by the PSSCH, and the SCI carried on the PSCCH is used to indicate the location of the resources used by the PSSCH.

[0062] Eighthly, a method for managing a sidelink carrier is provided, the method comprising: a base station sending a second message to a first communication device, the second message including configuration information of at least one sidelink SL carrier, the second message being used to instruct the first communication device to determine at least one SL carrier for communicating with a second communication device.

[0063] In conjunction with the eighth aspect, in a first possible implementation of the eighth aspect, the information of the at least one SL carrier includes the configuration information of the primary carrier PCC.

[0064] In conjunction with the first possible implementation of the eighth aspect, in the second possible implementation of the seventh aspect, the information of the at least one SL carrier further includes configuration information of at least one secondary carrier SCC, the PCC carrying control information used to schedule resources for transmitting data on the SCC.

[0065] In conjunction with the eighth aspect or any of the first or second possible implementations of the eighth aspect, in the third possible implementation of the eighth aspect, the method further includes: the base station receiving a third message sent by the first communication device, the third message including information of at least one SL carrier.

[0066] A ninth aspect provides an apparatus for managing sidelink carriers, the apparatus comprising: a processing module for acquiring configuration information of a plurality of sidelink SL carriers; the processing module further comprising determining at least one SL carrier from the plurality of SL carriers; and a transceiver module for sending a first message to a second communication device, the first message including information of the at least one SL carrier.

[0067] Through the above-mentioned device, the communication device identifies at least one SL carrier as a communication carrier, which enables timely and effective management of SL carriers for unicast connections, thereby improving the efficiency of SL carrier communication and system capacity.

[0068] A tenth aspect provides an apparatus for determining HARQ feedback resources, the apparatus comprising: a transceiver module configured to send first information to a second communication device at the location of a first physical side crosslink shared channel (PSSCH) resource, the location of the first PSSCH resource being on a first SCC, the first SCC being any one of the SCCs; and to receive hybrid automatic repeat request (HARQ) feedback information of the first information at the location of a first physical side crosslink feedback channel (PSFCH) resource, the location of the first PSSCH resource being determined based on the location of the first PSSCH resource, the location of the first PSSCH resource being on the first SCC.

[0069] By using the above-mentioned device, the location of HARQ feedback resources for transmitted data on different secondary carriers is specified, thus avoiding the communication device's inability to determine the location of HARQ feedback resources during multi-carrier communication, which would otherwise affect transmission efficiency.

[0070] Eleventhly, a communication device is provided, comprising: a processing module, configured to determine a first switching time as the time for switching between a first frequency band and a second frequency band, wherein the first frequency band and the second frequency band are respectively the frequency bands of a PCC and a third SCC, and the third SCC is any SCC; to determine a time interval not less than the maximum value of the first switching time and the second switching time, wherein the time interval is the time interval between the end time of a first resource and the start time of a second resource, wherein the first resource belongs to the first frequency band, the second resource belongs to the second frequency band, and the first resource is prior to the timing of the second resource; and a transceiver module, configured to receive a fourth message sent by the second communication device, the fourth message including a second switching time, wherein the second switching time is the time for the second communication device to switch between the first frequency band and the second frequency band.

[0071] By introducing the switching time capability through the aforementioned communication device, the transmission chain or receiver chain of the communication device can simultaneously support two frequency bands in a frequency band pair, thereby improving communication capability and avoiding the problem of limited communication device capability.

[0072] In a twelfth aspect, a sidelink carrier management apparatus is provided, the apparatus comprising: a transmitting module for receiving a first message transmitted by a first communication device, the first message including configuration information of at least one sidelink SL carrier, the at least one SL carrier being determined by the first communication device from a plurality of SL carriers.

[0073] With the above-mentioned device, the SL carrier of the unicast connection can be managed more timely and effectively by the communication device, which is conducive to improving the efficiency of SL carrier communication and system capacity.

[0074] In a thirteenth aspect, an apparatus for determining HARQ feedback resources is provided. The apparatus includes: a transceiver module configured to receive first information transmitted by a first communication device at the location of a first physical side crosslink shared channel (PSSCH) resource, the location of the first PSSCH resource being on a first SCC, the first SCC being any SCC; the transceiver module is further configured to transmit hybrid automatic repeat request (HARQ) feedback information of the first information at the location of the first PSFCH resource, the location of the first PSFCH resource being determined based on the location of the first PSSCH resource, the location of the first PSFCH resource being on the first SCC.

[0075] By using the above-mentioned device, the location of HARQ feedback resources for transmitted data on different secondary carriers is specified, thus avoiding the communication device's inability to determine the location of HARQ feedback resources during multi-carrier communication, which would otherwise affect transmission efficiency.

[0076] In a fourteenth aspect, a communication device is provided, comprising: a processing module configured to determine a second switching time as the time for switching between a first frequency band and a second frequency band, wherein the first frequency band and the second frequency band are respectively the frequency bands of a PCC and a third SCC, and the third SCC is any one of the SCCs; a transceiver module configured to send a fourth message to the first communication device, the fourth message including the second switching time; and to transmit messages between a first resource and a second resource and the first communication device, wherein the first resource belongs to the first frequency band, the second resource belongs to the second frequency band, and the time interval between the end time of the first resource and the start time of the second resource is not less than the maximum value of the first switching time and the second switching time, wherein the first switching time is the time for the first communication device to switch between the first frequency band and the second frequency band.

[0077] By introducing the switching time capability through the aforementioned communication device, the transmission or reception chain of the communication device can simultaneously support two frequency bands in a frequency band pair, thereby improving communication capability and avoiding the problem of limited communication device capability.

[0078] In a fifteenth aspect, a sidelink carrier management apparatus is provided, the apparatus comprising: a transceiver module for sending a second message to a first communication device, the second message including configuration information of at least one sidelink SL carrier, the second message being used to instruct the first communication device to determine at least one SL carrier for communicating with a second communication device.

[0079] In a sixteenth aspect, a communication device is provided, comprising: a processor for executing a computer program stored in a memory, such that the communication device performs any of the possible implementations of the first to seventh aspects.

[0080] In a seventeenth aspect, a computer-readable storage medium is provided, on which a computer program is stored, which, when run on a computer, causes the computer to perform any of the possible implementations of the first to seventh aspects.

[0081] Eighteenth aspect, a chip system is provided, the chip system comprising: a processor for calling and running a computer program from a memory, such that a communication device having the chip system mounted performs any of the possible implementations of the first to seventh aspects.

[0082] In a nineteenth aspect, a communication system is provided, comprising at least a base station and a first communication device. The first communication system is configured to acquire configuration information of a plurality of SL carriers of a sidelink SL. The base station is configured to send a second message to the first communication device, the second message including information of at least one SL carrier. The first communication device is further configured to send a first message to the second communication device, the first message including information of the at least one SL carrier. The communication system may also include the second communication device.

[0083] In conjunction with the nineteenth aspect, in a first possible implementation of the nineteenth aspect, the base station is further configured to send configuration information of multiple SL carriers of the sidelink SL to the first communication device.

[0084] In conjunction with the nineteenth aspect or the first possible implementation of the nineteenth aspect, in the second possible implementation of the nineteenth aspect, the first communication device is further configured to send a third message to the base station, the third message including information about the at least one SL carrier. Attached Figure Description

[0085] Figure 1 This is an example diagram of the system architecture of an embodiment of this application.

[0086] Figure 2 This is an example of an interactive diagram illustrating a side-link carrier management method according to an embodiment of this application.

[0087] Figure 3 This is an example schematic framework diagram of an embodiment of this application.

[0088] Figure 4 This is another illustrative interactive diagram illustrating the side-link carrier management method according to an embodiment of this application.

[0089] Figure 5 This is another illustrative framework diagram of an embodiment of this application.

[0090] Figure 6 This is another illustrative interactive diagram illustrating the side-link carrier management method according to an embodiment of this application.

[0091] Figure 7 This is an example of an interactive diagram illustrating a method for determining HARQ feedback resources according to an embodiment of this application.

[0092] Figure 8 This is an example schematic framework diagram of an embodiment of this application.

[0093] Figure 9 This is another illustrative framework diagram of an embodiment of this application.

[0094] Figure 10 This is another illustrative interactive diagram illustrating the method for determining HARQ feedback resources according to an embodiment of this application.

[0095] Figure 11 This is another illustrative framework diagram of an embodiment of this application.

[0096] Figure 12 This is another illustrative framework diagram of an embodiment of this application.

[0097] Figure 13 This is another illustrative framework diagram of an embodiment of this application.

[0098] Figure 14 This is a schematic block diagram of a communication method according to an embodiment of this application.

[0099] Figure 15 This is an example of an illustrative architecture diagram of an embodiment of this application.

[0100] Figure 16 This is another illustrative architecture diagram of an embodiment of this application.

[0101] Figure 17 This is a schematic block diagram of an example of the transmitting communication device of this application.

[0102] Figure 18 This is a schematic block diagram of an example of the receiving end communication device of this application.

[0103] Figure 19 This is a schematic block diagram of an example of a base station of this application.

[0104] Figure 20 This is a schematic block diagram of an example of the communication device of this application.

[0105] Figure 21 This is a schematic block diagram of another example of the communication device of this application.

[0106] Figure 22 This is a schematic structural diagram of the communication device of this application. Detailed Implementation

[0107] The technical solutions in this application will now be described with reference to the accompanying drawings in the embodiments of this application.

[0108] The technical solutions of this application can be applied to various communication systems, such as: Long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD) systems, Worldwide Interoperability for Microwave Access (WiMAX) communication systems, New Radio (NR) systems, or other future evolved wireless communication systems.

[0109] Figure 1 A schematic diagram of a communication architecture according to an embodiment of this application is shown, such as... Figure 1 As shown, the communication system of this application includes at least two communication devices that communicate via a sidelink SL carrier. These communication devices can be within network coverage, in a connected, idle, or inactive state, or they can be outside network coverage. It should be noted that the sidelink SL carrier typically refers to the carrier on the PC5 interface. Here, "sidelink SL" is a descriptive designation for the carrier on the PC5 interface to distinguish it from the carrier on the Uu interface, but it should not constitute any substantive limitation.

[0110] By way of example and not limitation, the communication device in the embodiments of this application can be a device with wireless communication transceiver function or a device or chip system within a device with wireless communication transceiver function. The communication device in the embodiments of this application supports sidelink communication and can be deployed on land, including indoors or outdoors, on the roadside, handheld or vehicle-mounted; it can also be deployed on water (such as ships); and it can also be deployed in the air (e.g., on airplanes, balloons, and satellites). The terminal device can be a mobile phone, tablet computer, computer with wireless transceiver function, virtual reality (VR) terminal, augmented reality (AR) terminal, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical care, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, user equipment (UE), vehicle-mounted communication device, vehicle-mounted communication chip, roadside unit or communication device in roadside unit, etc.

[0111] As an example and not a limitation, the base station referred to in the embodiments of this application can be a device that provides wireless communication function services for terminal devices, usually located on the network side. Exemplary specific implementations include, but are not limited to: next-generation base stations (g nodeB, gNB) in 5th generation (5G) communication systems, evolved node B (eNB) in LTE systems, radio network controllers (RNC), node B (NB), baseband units (BBU), transmitting and receiving points (TRP), transmitting points (TP), mobile switching centers, devices that provide wireless communication services for terminal devices in V2X communication systems, wireless controllers in cloud radio access network (CRAN) scenarios, relay stations, vehicle-mounted devices, wearable devices, and network devices in future evolved networks, etc. In a network architecture, a base station can be a RAN device that includes centralized unit (CU) nodes, distributed unit (DU) nodes, or CU nodes and DU nodes, or a RAN device that includes control plane CU nodes (CU-CP nodes), user plane CU nodes (CU-UP nodes), and DU nodes.

[0112] The sidelink carrier management method provided in the embodiments of this application will be described below.

[0113] Figure 2 A schematic flowchart of a sidelink carrier management method 100 according to an embodiment of this application is shown. Figure 2 The method 100 includes:

[0114] S110, the first communication device acquires configuration information for multiple SL carriers;

[0115] S120, the first communication device determines at least one SL carrier from the plurality of SL carriers;

[0116] S130, the first communication device sends a first message to the second communication device, the first message including information about the at least one SL carrier.

[0117] For example, the first communication device first obtains available SL resource information, i.e., configuration information of multiple SL carriers. Optionally, the first communication device can obtain the configuration information of multiple SL carriers from the base station through dedicated signaling, or by listening to system broadcasts to obtain the configuration information of multiple SL carriers. Optionally, the configuration information of the multiple SL carriers includes carrier frequency information, resource pool configuration information, and at least one of subcarrier spacing, bandwidth, and synchronization configuration information of the multiple SL carriers. Then, the first communication device determines at least one SL carrier from the multiple SL carriers. Optionally, the first communication device can determine the at least one SL carrier according to the indication information sent by the base station, or determine the at least one SL carrier itself according to preset rules. Then, the first communication device informs the peer communication device of the unicast connection, i.e., the second communication device, of the information of the at least one SL carrier through a first message. Therefore, in the sidelink carrier management method provided in this application, the first communication device obtains the configuration information of multiple carriers, then determines at least one carrier as a communication carrier for its unicast connection with the second communication device from the multiple carriers, and indicates the determined at least one carrier to the second communication device. The SL carrier management method of this application embodiment determines at least one SL carrier for a unicast connection through the transmitting end communication device and indicates the at least one SL carrier to the receiving end communication device, thereby realizing real-time and effective management of SL carriers and improving the efficiency of SL carrier communication and system capacity.

[0118] It should be noted that, in the embodiments of this application, the first communication device may be a communication device in a connected state (e.g., RRC connected state) or a communication device in a disconnected state (e.g., idle state, inactive state, or wireless link failure state), and this application does not limit this. Furthermore, for ease of explanation, the following embodiments of this application will use a UE as an example for illustration.

[0119] It should be understood that the first communication device may have multiple unicast connections, i.e., multiple peer communication devices. When multiple unicast connections exist, the first communication device determines at least one SL carrier for each peer communication device of the unicast connection. It should also be understood that the at least one SL carrier determined by the first communication device for each peer communication device of the unicast connection may be the same or different, and this application does not limit this.

[0120] Figure 3 This diagram illustrates a schematic framework of an application scenario according to an embodiment of this application when the UE is in a connected state. Figure 3As shown, UE1 is the transmitting communication device, and UE2 is the receiving communication device connected to UE1 via unicast. UE1 is in a connected state with the base station, and therefore can obtain SL resource information through the base station. The unicast connection between UE1 and UE2 is conducted through the side-link SL carrier. It should be noted that this side-link SL is only used to distinguish it from the carrier on the Uu interface and does not serve any other limiting function.

[0121] It should be understood that Figure 3 The illustration uses UE1 as the transmitting communication device and UE2 as the receiving communication device as an example, but the embodiments of this application are not limited to this. For example, UE2 can also be a transmitting communication device, and UE1 can also be a receiving communication device.

[0122] It should also be understood that the transmitting end communication device UE1 may have only one unicast connection or multiple unicast connections, and this application embodiment does not limit this.

[0123] Figure 4 This illustration shows a schematic interactive diagram of a side-link carrier management method 200 provided in an embodiment of this application. This method 200 can be applied to... Figure 3 Within the application scenario shown. From Figure 4 As can be seen from this, method 200 includes:

[0124] S210, UE1 obtains configuration information for multiple SL carriers from the base station.

[0125] Optionally, before UE1 obtains the configuration information of multiple SL carriers of the sidelink SL from the base station, UE1 sends a request message to the base station. This request message may be, for example, sidelink UE Information NR, which is used to request SL resource information from the base station.

[0126] Optionally, the request information includes UE1's service information, which is used to indicate UE1's service requirements. For example, the service information includes UE1's unicast connection identifier (destination layer 2 identifier), frequency, QoS requirements, propagation type (unicast, broadcast, or multicast), etc.

[0127] The base station determines multiple SL carriers based on the request information. Optionally, these multiple SL carriers satisfy the service requirements of UE1.

[0128] The base station then sends the configuration information of the multiple SL carriers to UE1. For example, the base station sends an RRC message to UE1, which includes the configuration information of the multiple SL carriers.

[0129] S220, UE1 determines at least one SL carrier from the plurality of SL carriers.

[0130] For example, UE1 determines one of the multiple SL carriers as the primary component carrier (PCC).

[0131] Optionally, UE1 determines the PCC based on the base station's instruction.

[0132] For example, the base station identifies one SL carrier as the PCC among multiple SL carriers, and then sends a second message to UE1, which includes information about the PCC. UE1 determines the PCC based on the second message.

[0133] It should be understood that the base station may send configuration information for multiple SL carriers to UE1 while simultaneously indicating PCC to UE1, or it may send configuration information for multiple SL carriers first and then indicate PCC to UE1. This application does not limit this.

[0134] Optionally, the base station determines the PCC based on link information and / or the service requirements of the communication device. For example, the base station selects the SL carrier with the best link status as the PCC; or the base station selects the SL carrier that best meets the service requirements of UE1 as the PCC; or the base station determines an SL carrier as the PCC based on a combination of link information and the service requirements of UE1. The embodiments of this application are not limited to these.

[0135] Optionally, UE1 can also determine at least one SL carrier as a secondary component carrier (SCC) from the plurality of SL carriers. That is, the at least one SL carrier determined by UE1 from the plurality of SL carriers includes one PCC and at least one SCC. When UE1 determines at least one SCC, it can schedule the resources for data transmission on the SCC across carriers through control information on the PCC. That is, the PCC can carry control information for scheduling the resources for data transmission on the SCC. This control information can be, for example, sidelink control information (SCI).

[0136] Optionally, UE1 determines the at least one SCC according to the base station's instruction. The base station determines at least one SL carrier among multiple SL carriers, the at least one SL carrier including one PCC and at least one SCC, and then sends a second message to UE1. The second message includes configuration information of the at least one SL carrier, that is, the second message includes configuration information of the PCC and the at least one SCC. The base station indicates the SL carrier for communication between UE1 and UE2 through the second message. Correspondingly, UE1 receives the second message and obtains the PCC and the at least one SCC from the second message as the communication carrier.

[0137] It should be understood that the base station may send configuration information for multiple SL carriers to UE1 while simultaneously indicating PCC and at least one SCC to UE1, or it may send configuration information for multiple SL carriers first and then indicate PCC and at least one SCC to UE1. This application does not limit this.

[0138] It should be understood that when UE1 has at least two unicast connections, the base station can indicate at least one SL carrier for each unicast connection of UE1. The at least one SL carrier indicated by the base station for each unicast connection can be the same or different. When the base station indicates different SL carriers for each unicast connection of UE1, the at least one SL carrier indicated for each different unicast connection can be identified by a unicast connection identifier. For example, the base station sends a second message to UE1, which includes a unicast connection identifier for each unicast connection and information about at least one SL carrier corresponding to each unicast connection identifier.

[0139] S230, UE1 sends information about the at least one SL carrier to UE2.

[0140] For example, UE1 sends a first message to UE2, the first message including information about the at least one SL carrier.

[0141] Optionally, after UE1 sends the information of the at least one SL carrier to UE2, UE1 obtains the link measurement information of the at least one SL carrier.

[0142] Optionally, UE1 monitors the link information of the at least one SL carrier to obtain first measurement information. It should be understood that UE1 may monitor each of the at least one SL carrier to obtain link measurement information.

[0143] Optionally, UE1 receives second measurement information from UE2, which is link measurement information obtained by UE2 through monitoring the link information of the at least one SL carrier. It should be understood that UE1 may receive the link measurement information of each of the at least one SL carriers measured by UE2, or it may only receive the link measurement information of SL carriers whose link measurement information does not meet the link rules of UE2. This application does not limit this.

[0144] UE1 updates the SL carriers whose link measurement information satisfies a second preset rule among the at least one SL carriers. This second preset rule may include, for example, a reference signal received quality (RSRQ) greater than or equal to a third threshold; and / or a channel busy ratio (CBR) less than or equal to a fourth threshold. Alternatively, the second preset rule may include: RSRQ greater than or equal to the third threshold, CBR less than or equal to the fourth threshold, and the existence of an SL carrier whose link measurement information satisfies a third preset rule. This third preset rule may include, for example, RSRP less than or equal to a fifth threshold and CBR greater than or equal to a sixth threshold. UE1 updating the SL carriers whose link measurement information satisfies the second preset rule means that after UE1 obtains the link measurement information of the at least one SL carrier, it updates the SL carriers among the at least one SL carriers that satisfy the second preset rule. This update refers to determining a new SL carrier from among the multiple SL carriers obtained in S210 to replace the SL carrier that satisfies the second preset rule. This new SL carrier may be an SL carrier that satisfies the third preset rule.

[0145] It should be understood that UE1 can comprehensively consider the first measurement information obtained through its own monitoring and the second measurement information sent by UE2. For example, the second preset rule is: the RSRQ in the first measurement information is greater than the fifth threshold and the RSRQ in the second measurement information is greater than the sixth threshold.

[0146] It should be understood that UE1 can obtain the second preset rule through a predefined method, or it can receive the second preset rule sent by the base station. When UE1 obtains the second preset rule through the base station, the base station can send the second preset rule to UE1 in step S210, or it can send the second preset rule after step S210. This application does not limit this.

[0147] It should also be understood that the embodiments of this application only use RSRQ and RSSI as link measurement information for illustration, but the embodiments of this application are not limited to this. For example, UE1 or UE2 can measure other link information or combinations of other link information according to user needs or service requirements, such as: channel busy ratio (CBR), reference signal received power (RSRP), or channel state information (CSI).

[0148] S240, UE1 sends information about the at least one SL carrier to the base station.

[0149] For example, UE1 sends a third message to the base station, which includes configuration information of the at least one SL carrier.

[0150] It should be understood that when UE1 updates the at least one SL carrier in S230, the at least one SL carrier is the updated SL carrier.

[0151] It should be noted that the message content sent by UE1 when indicating the at least one SL carrier to the base station and when UE1 when indicating the at least one SL carrier to UE2 may be different.

[0152] Optionally, the third message includes a unicast connection identifier, which is used to identify the unicast connection between UE1 and UE2. It should be understood that when UE1 has multiple unicast connections, the third message includes a unicast connection identifier for each unicast connection, as well as an SL carrier corresponding to each unicast connection identifier. That is, when UE1 indicates a communication carrier to the base station, it can distinguish between different unicast connections for indication.

[0153] Therefore, the sidelink carrier management method provided in this application determines at least one SL carrier for a unicast connection through the transmitting end communication device and indicates the at least one SL carrier to the receiving end communication device, thereby realizing real-time and effective management of SL carriers and improving the efficiency of SL carrier communication and system capacity.

[0154] Figure 5 This diagram illustrates a schematic framework of an application scenario of this application when UE3 is in a disconnected state, such as an idle or inactive state. Figure 5 As shown, UE3 is the transmitting communication device, and UE4 is the receiving communication device that is unicast connected to UE3. The base station and UE3 are in a disconnected state, and the base station cannot directly indicate SL resources to UE3.

[0155] It should be understood that Figure 5 The example described uses UE3 as the transmitting communication device and UE4 as the receiving communication device, but the embodiments of this application are not limited to this. For example, UE4 can also be the transmitting communication device and UE3 can also be the receiving communication device.

[0156] It should also be understood that the transmitting communication device UE3 may have only one unicast connection or multiple unicast connections, and the comparison of the embodiments in this application is not limited thereto. Figure 6 This illustration shows a schematic interactive diagram of the side-link carrier management method 300 provided in this application, which can be applied to... Figure 5 or Figure 3 The application scenario is shown. Taking unicast communication between UE4 and UE5 as an example, the method 300 includes:

[0157] S310, UE3 obtains configuration information for multiple SL carriers based on system information or pre-configuration information.

[0158] For example, UE3 obtains configuration information of multiple SL carriers by listening to the system broadcast of the base station, or UE3 obtains configuration information of multiple SL carriers based on pre-configuration information.

[0159] It should be understood that a UE in a connected state can also obtain SL resources using the methods described above. For example... Figure 3 In the application scenario shown, UE1 can obtain configuration information for multiple SL carriers through the base station, or it can autonomously obtain configuration information for multiple SL carriers by listening to system broadcasts, or it can obtain configuration information for multiple SL carriers based on pre-configured information. This application does not limit this.

[0160] S320, UE3 determines at least one SL carrier from the plurality of SL carriers.

[0161] For example, UE3 determines one SL carrier as the primary carrier PCC from the plurality of SL carriers.

[0162] Optionally, UE3 may autonomously determine the PCC according to the first preset rule.

[0163] For example, UE3 determines one SL carrier among the plurality of SL carriers that satisfies a first preset rule as the PCC. This first preset rule may include, for example, that the Reference Signal Received Power (RSPR) is greater than a first threshold; and / or the Channel Busy Ratio (CBR) is less than a second threshold. It should be understood that when multiple SL carriers satisfy the first preset rule, the SL carrier with the best link state can be selected as the PCC. The embodiments of this application are not limited thereto.

[0164] Optionally, UE3 can also determine at least one SL carrier as a secondary carrier SCC from the plurality of SL carriers, that is, the at least one SL carrier determined by UE4 from the plurality of SL carriers includes one PCC and at least one SCC. When UE4 determines at least one SCC, it can schedule the resources for data transmission on the SCC across carriers through control information on the PCC, that is, the PCC can carry control information for scheduling the resources for data transmission on the SCC, such as sidelink control information (SCI).

[0165] It should be understood that when UE3 has multiple unicast connections, UE4 can determine at least one SL carrier for each unicast connection. The SL carrier determined by UE3 for each unicast connection can be the same or different. For example, different preset rules can be determined for each unicast connection based on its Quality of Service (QoS), and UE3 can determine at least one SL carrier for each unicast connection accordingly based on these different preset rules. Alternatively, the same preset rule can be used to determine at least one SL carrier for each unicast connection, specifically, for example, RSRP greater than or equal to a threshold. Then, different thresholds are determined for each unicast connection based on its QoS, and UE3 can determine at least one SL carrier for each unicast connection accordingly based on the preset rules and these different thresholds. It should also be understood that a communication device in a connected state can also autonomously determine the at least one SL carrier. For example, in… Figure 3 In the application scenario shown, UE1 can also autonomously determine at least one SL carrier from multiple SL carriers according to preset rules. This application does not limit this.

[0166] S330, UE3 sends information about the at least one SL carrier to UE4.

[0167] It should be understood that the specific procedures for updating the SL carrier in method 200 also apply to method 300. For example, after UE3 sends the information of the at least one SL carrier to UE4, UE3 obtains the link measurement information of the at least one SL carrier, and UE3 updates the SL carrier whose link measurement information satisfies the second preset rule. For the sake of brevity, this application will not elaborate further.

[0168] It should be noted that the sidelink carrier management method of this application embodiment can also be applied to multicast communication scenarios. Multicast communication refers to communication between UEs within a communication group, where any UE within the group can send and receive data for the multicast service. When implementing the sidelink carrier management method of this application embodiment in a multicast communication scenario, after the sending UE determines at least one SL carrier for multicast communication, it needs to send information about the at least one SL carrier to every other UE in the group. It should be understood that the sending UE can send the information about the at least one SL carrier sequentially to every other UE in the group via unicast connection, or the sending UE can send the information about the at least one SL carrier simultaneously to every other UE in the group via multicast.

[0169] When the transmitting communication device engages in unicast communication with the peer communication device via an SL carrier, the receiving communication device can send a hybrid automatic repeat request (HARQ) response after receiving the data sent by the transmitting communication device. For example, if the receiving communication device successfully receives the data, it returns an ACK signal; or if the receiving communication device fails to receive the data, it returns a NACK signal.

[0170] However, when the transmitting and receiving communication devices communicate via multiple SL carriers—that is, when they communicate via a PCC and at least one SCC—the receiving communication device cannot determine the location of the resource for transmitting HARQ feedback information on the SCC. Similarly, the transmitting communication device cannot determine the location of the resource for receiving HARQ feedback information on the SCC. Therefore, how the transmitting and receiving communication devices determine the location of the resource for transmitting HARQ feedback information on the SCC is a problem that needs to be solved.

[0171] Figure 7 A schematic interactive diagram is shown for a method 400 for determining the location of HARQ feedback resources according to an embodiment of this application. Figure 7 The method 400 includes:

[0172] S410, the first communication device sends first information to the second communication device on the first physical sidelink shared channel (PSSCH) resource, the location of the first PSSCH resource is on the first SCC, the first SCC is any one of the SCCs in the multi-carrier.

[0173] S420, the first communication device receives HARQ feedback information of the first information sent by the second communication device at the location of the first physical side link feedback channel (PSFCH) resource. The location of the first PSFCH resource is determined according to the location of the first PSSCH resource. The location of the first PSFCH resource is on the first SCC. The PSFCH and the PSSCH are in the same resource pool.

[0174] For example, when the first communication device and the second communication device communicate through multiple SL carriers, the first and second communication devices determine the location of the HARQ feedback information resource, i.e., the location of the PSFCH resource, for data transmission on each SL carrier. A method for the first and second communication devices to determine the resource location of the HARQ feedback information for data transmission on the SCC is as follows: the first communication device sends first information to the second communication device at the location of the first PSSCH resource. This first information includes a second-level SCI and transmitted data. The first PSSCH is located on the first SCC. Then, based on the location of the first PSSCH resource, the first and second communication devices determine the location of the first PSFCH resource on the first SCC. The second communication device then sends the HARQ feedback information of the first information to the first communication device at the location of the first PSFCH resource. That is, the HARQ feedback information corresponding to the data transmitted on each SCC is transmitted on that SCC.

[0175] Figure 8 A schematic diagram illustrating the method for determining HARQ feedback resources using method 400 is shown. Figure 8 In this example, the first communication device and the second communication device communicate via three SL carriers, including PCC, SCC1, and SCC2. The first communication device schedules data transmission resources PSSCH1 on SCC1 across carriers via SCI1 on PCC, and schedules data transmission resources PSSCH2 on SCC2 across carriers via SCI2.

[0176] The second communication device determines the location of the PSFCH1 resource on SCC1 based on the location of the PSSCH1 resource. Then, the second communication device sends HARQ feedback information for the data transmitted on PSSCH1 to the first communication device on that PSFCH1.

[0177] Similarly, the first communication device determines the location of the PSFCH1 resource on SCC1 based on the location of the PSSCH1 resource, and receives the HARQ feedback information sent by the second communication device on the PSFCH1.

[0178] Optionally, multiple PSSCH resources can be indicated by a single SCI, which can be a first-level SCI. For example, in Figure 9The illustrated application method 400 provides another method for determining the location of HARQ feedback resources. For example, a first communication device and a second communication device communicate via three SL carriers, including PCC2, SCC3, and SCC4. The first communication device schedules data transmission resources PSSCH3 and PSSCH4 on SCC3 and SCC4 across carriers via SCI3 on ​​PCC2. SCI3 is a first-level SCI, meaning the first communication device can simultaneously schedule SL resources on different carriers using a single first-level SCI.

[0179] Therefore, the method for determining HARQ feedback resources in this application embodiment avoids the communication device being unable to determine the HARQ feedback resource location during multi-carrier communication, thereby affecting transmission efficiency, by specifying the HARQ feedback resource location of transmitted data on different secondary carriers.

[0180] Figure 10 A schematic interactive diagram is shown for a method 500 for determining the location of HARQ feedback resources according to an embodiment of this application. Figure 10 The method 500 includes:

[0181] S510, the first communication device sends second information at the location of the first PSSCH resource, the second PSSCH being on the second SCC, the second SCC being any one of the multiple carriers.

[0182] S520, the first communication device receives HARQ feedback information of the second information sent by the second communication device at the location of the first PSFCH resource, the location of the second PSFCH resource being on the PCC.

[0183] Prior to S520, the first communication device and the second communication device need to determine the location of the second PSFCH resource respectively.

[0184] Optionally, the first communication device and the second communication device determine the location of the second PSFCH resource based on the location of the second PSSCH resource, and at least one of the index of the second SCC and the resource pool identifier of the second PSSCH. For example, in Figure 11 In the schematic diagram of a method for determining the location of HARQ feedback resources in the application method 500 shown, exemplarily, a first communication device and a second communication device communicate via three SL carriers, including PCC3, SCC5, and SCC6. The first communication device schedules the resource PSSCH5 for transmitting data on SCC5 across carriers via SCI4 on PCC3, and schedules the resource PSSCH6 for transmitting data on SCC6 across carriers via SCI5.

[0185] It should be noted that there can be multiple resource pools on an SL carrier. When determining the location of HARQ feedback resources, the resource pools need to be determined first.

[0186] Taking the process of the first communication device determining the location of the second PSFCH resource as an example, the first communication device determines the resource pool of the second PSFCH. The resource pool in which the second PSFCH resource is located is in the same resource pool as the physical side link control channel (PSCCH) resource, which carries SCI4. Then, the first communication device determines the location of the PSFCH5 resource based on the location of the PSSCH5 resource, and at least one of the index of SCC5 and the identifier of the resource pool in which the PSSCH5 is located. It should be understood that the location of the PSSCH3 resource is its relative position within its corresponding resource pool. The index of SCC5 is used to indicate the specific SCC, and the identifier of the resource pool in which the PSSCH5 is located is used to indicate the resource pool in which the PSFCH5 is located. It should also be understood that the first communication device can determine the location of the PSFCH5 resource based solely on the location of the PSSCH5 resource and the identifier of the resource pool in which the PSSCH5 is located. For example, resource pools on different SL carriers can be uniformly numbered. In this case, the resource pool where PSFCH5 is located and the SCC where PSSCH5 is located can be uniquely determined based on the resource pool identifier.

[0187] It should be understood that prior to method 500, multi-carrier management can be performed using the side-link carrier management methods shown in methods 100-300. In this case, when the first communication device sends information about at least one determined SL carrier to the second communication device, it needs to carry the index of the SCC, for example, the index of SCC5 in this embodiment.

[0188] Optionally, the first or second communication device determines the location of the second PSSCH resource based on the location of the PSCCH resource, wherein the PSCCH resource carries an SCI indicating the location of the second PSSCH resource, and the location of the PSCCH resource is on the PCC. For example, in Figure 12 The illustrated application method 500 provides another method for determining the location of HARQ feedback resources. For example, a first communication device and a second communication device communicate via three SL carriers, including PCC4, SCC7, and SCC8. The first communication device schedules data transmission resources PSSCH7 on SCC7 across carriers via SCI6 on PCC4, and schedules data transmission resources PSSCH8 on SCC8 across carriers via SCI7.

[0189] Taking the process of the first communication device determining the location of the second PSFCH resource as an example, the first communication device determines the location of the PSFCH7 resource based on the location of the PSCCH7 resource where SCI6 is located, and determines the location of the PSFCH8 resource based on the location of the PSCCH8 resource where SCI7 is located. At this time, the first communication device can determine the location of the HARQ feedback resource based solely on the location of the PSCCH resource on PCC4.

[0190] Optionally, multiple PSSCH resources can be indicated by a single SCI, which can be a first-level SCI. For example, in Figure 13 The illustrated application method 500 provides another method for determining the location of HARQ feedback resources. For example, a first communication device and a second communication device communicate via three SL carriers, including PCC5, SCC9, and SCC10. The first communication device schedules data transmission resources PSSCH9 and PSSCH10 on SCC9 and SCC10 across carriers via SCI8 on PCC5. This SCI8 is a first-level SCI, meaning the first communication device can simultaneously schedule SL resources on different carriers using a single first-level SCI. Optionally, data on SCC9 and SCC10 can be bound for feedback; that is, either the first or second communication device can determine a PSFCH9 as the location of their HARQ feedback resource based on SCI8 for PSSCH9 and PSSCH10.

[0191] It should be understood that for scenarios involving binding and providing feedback on data from multiple SCCs, feedback rules can be set according to business needs or user requirements, for example, in... Figure 13 In the scenario shown, the second communication device sends an ACK feedback to the first communication device via PSFCH only when both data on SCC9 and SCC10 require ACK feedback; or, the second communication device sends an ACK feedback to the first communication device via PSFCH only when at least one data on SCC9 and SCC10 requires ACK feedback. This application does not limit this specific scenario.

[0192] Therefore, the method for determining HARQ feedback resources in this application embodiment avoids the communication device being unable to determine the HARQ feedback resource location during multi-carrier communication, thereby affecting transmission efficiency, by specifying the HARQ feedback resource location of transmitted data on different secondary carriers.

[0193] It should be noted that the methods for determining HARQ feedback resources provided in the embodiments of this application 400 or 500 can be implemented independently in the corresponding application scenarios, or they can be used in the application scenarios of methods 100, 200 or 300 in the embodiments of this application. That is, in the specific implementations of methods 100 to 300, when two communication devices communicate through multiple carriers, the methods provided by methods 400 or 500 can be used to determine HARQ feedback resources.

[0194] When two communication devices communicate unicastly via multiple SL carriers, and the number of transmit chains (Tx chains) or receive chains (Rx chains) is insufficient to simultaneously support multiple frequency bands, the communication devices face capability limitations. Therefore, how to support a combination of multiple frequency bands simultaneously using a single transmit or receive chain is a problem that urgently needs to be solved.

[0195] Figure 14 A schematic block diagram of a communication method 600 according to an embodiment of this application is shown. In this method 600, a first communication device is a transmitting communication device, and a second communication device is a receiving communication device. This method 600 can be executed, for example, by a base station or the first communication device. Figure 14 As shown, the method 600 includes:

[0196] S610, obtain the first switching time and the second switching time, the first switching time and the second switching time being the switching time between the first communication device and the second communication device in the first frequency band and the second frequency band, respectively.

[0197] Optionally, when the base station executes the method 600, obtaining the first handover time and the second handover time includes: receiving first information sent by the first communication device, the first information including the first handover time and the second handover time.

[0198] Optionally, when the first communication device executes the method 600, obtaining the first switching time and the second switching time includes: determining the first switching time; receiving second information sent by the second communication device, the second information including the second switching time.

[0199] S620, determine that the time interval is not less than the maximum value of the first switching time and the second switching time, the time interval is the time interval between the end time of the first resource and the start time of the second resource, the first resource belongs to the first frequency band, the second resource belongs to the second frequency band, and the first resource is before the timing of the second resource.

[0200] In the communication method of this application embodiment, a time-division multiplexing approach enables one transmission chain (Txchain) of the communication device to simultaneously support two frequency bands in a band pair. For example, a switchtime is introduced to allow the Txchain to switch between the two frequency bands in a band pair. Figure 15 This diagram illustrates how the transmission chain switches within a band pair using switch time. From Figure 15 As can be seen, the first frequency band and the second frequency band are two frequency bands in a frequency band pair, and the time for the transmission chain to switch from the first frequency band to the second frequency band is the switching time. When the base station or the first communication device allocates resources, it determines that the time interval between the end time of the resource with the earlier timing sequence and the start time of the resource with the later timing sequence is greater than or equal to the switching time.

[0201] Before the first communication device and the second communication device engage in multi-carrier communication, when the base station schedules or allocates SL resources for the first communication device, method 600 can be executed by the base station. For example, the base station first obtains the first switching time of the first communication device and the second switching time of the second communication device, wherein the first switching time is the switching time of the first communication device between the first frequency band and the second frequency band, and the second switching time is the switching time of the second communication device between the first frequency band and the second frequency band. Specifically, for example, the first communication device reports the first switching time to the base station and receives the second switching time sent by the second communication device, and then reports the second switching time to the base station. That is, the first communication device first reports its own switch time capability to the base station, and after obtaining the switch time capability of the second communication device from the second communication device, it reports the switch time capability of the second communication device to the base station. It should be understood that the base station is the base station connected to the first communication device. A similar process is used for base stations connected to the second communication device to report their switch time capabilities, which will not be elaborated further in this application. Then, when the base station allocates or schedules SL resources for the first communication device, it ensures that the time interval between the first resource and the second resource is greater than the maximum value of the first handover time and the second handover time, thereby ensuring that Txchain can support time synchronization of one frequency band simultaneously using time division without conflict in the time domain.

[0202] It should be noted that when the sending communication device acquires SL resources for SL data transmission, it needs to decide which SL data to send using those resources. When the SL data to be sent belongs to a unicast connection, switch time limitations also need to be considered. For example, after the first communication device acquires the first and second SL resources, it performs Logical Channel Priority (LCP) processing to determine the SL data to be sent first. When the SL data to be sent first belongs to a unicast connection, it needs to ensure that the switching time of both the first and second communication devices is less than the time interval between the first and second SL resources. The second communication device is the peer communication device of the first communication device in that unicast connection.

[0203] Before the first communication device engages in multi-carrier communication with the second communication device, and the first communication device acquires available resources by listening to SL resources, method 600 can be executed by the first communication device. For example, the first communication device first acquires the second switching time of the second communication device. Then, when determining the first and second resources, the first communication device ensures that the time interval between the first and second resources is greater than the maximum value of the first and second switching times, thereby ensuring that the Tx chain supports time synchronization of a frequency band simultaneously using time division without time-domain conflicts. It should be noted that when the first communication device acquires resources based on service data from a specific unicast connection, the first communication device needs to consider the limitations of switch time capability when acquiring resources. When the first communication device has multiple unicast connections requiring data transmission, the first communication device needs to decide which unicast connection to use the acquired SL resources for data transmission and additionally consider the switch time capability limitations.

[0204] Figure 16 A schematic diagram illustrating a specific implementation of the communication method 600 in multi-carrier communication is shown. For example, as... Figure 16 As shown, PCC is the first frequency band, and SCC is the second frequency band. The Tx chain switches between the first and second frequency bands using a time-division multiplexing method. The first communication device indicates the location of PSSCH resources on the SCC via the SCI cross-carrier on the PCC. The time-frequency resources occupied by the SCI are PSCCH resources, which are the first resource and the second resource. The end time and start time of the PSCCH resources are the time interval. When allocating the PSCCH and PSSCH resources, the first communication device or the base station needs to ensure that the time interval is greater than the maximum handover time. The maximum handover time is the maximum value of the handover time between the first and second communication devices between the PCC and SCC.

[0205] It should be understood that both the first and second resources can be PSSCH resources. Alternatively, the first resource can be a PSSCH resource, and the second resource can be a PSFCH resource. For example, in... Figure 11 In the schematic diagram of the method for determining the location of HARQ feedback resources, in order to avoid the problem of limited communication device capabilities, the first communication device or base station needs to ensure that the time interval between PSSCH5 resources and PSFCH5 resources is greater than the maximum handover time when allocating PSSCH5 resources and PSFCH5 resources.

[0206] It should be understood that the switching time of a communication device in a frequency band pair is a hardware capability of the current communication device. The switching time of different communication devices in the same frequency band pair may be the same or different.

[0207] It's important to note that the switch time described above refers to the switch time between two frequency bands, meaning it's a capability specific to a band pair. However, this doesn't mean the corresponding band combination only has two bands. For example, this band pair can be a single band pair within a single band combination. Even within the same band pair, the switch time might differ across different band combinations. For instance, consider two band combinations: Band A+B+C and Band A+B+D. The switch time for band A+B within the A+B+C combination might differ from the switch time for A+B within the A+B+D combination. Therefore, this switch time represents the capability of a single band pair within a single band combination.

[0208] It should be understood that similar methods can be used to enable the receiver chain (Rx chain) of a communication device to simultaneously support two frequency bands in a band pair. For the sake of brevity, this application will not elaborate further.

[0209] Therefore, the communication method of this application embodiment, by introducing the ability to switch time, enables the transmission chain or receiving chain of the communication device to simultaneously support two frequency bands in a frequency band pair, thereby improving the communication capability.

[0210] It should be noted that the communication method 600 provided in the embodiments of this application can be implemented independently in the corresponding application scenarios, or it can be used in the application scenarios of method 100, method 200 or method 300 in the embodiments of this application. That is, in the specific implementation of method 100 to 300, when two communication devices communicate through multiple carriers, the method provided by method 400 or method 500 can be used to avoid the problem of limited communication device capabilities.

[0211] The above, combined with Figures 2 to 16 The methods provided in the embodiments of this application are described in detail below. Figures 17 to 22 The communication device provided in the embodiments of this application is described in detail.

[0212] Figure 17 This is a schematic block diagram of a communication device provided in an embodiment of this application. As shown in the figure, the communication device 10 may include a transceiver module 11 and a processing module 12.

[0213] In one possible design, the communication device 10 may correspond to the first communication device or UE1 in the above method embodiments.

[0214] For example, the communication device 10 may correspond to the first communication device (or UE1 or UE4) in methods 100 to 600 according to embodiments of this application. The communication device 10 may include functions for performing... Figure 2 Method 100 or Figure 4 Method 200 or Figure 6 Method 300 Figure 7 Method 400 or Figure 9 Method 500 or Figure 14 The module of the method executed by the first communication device (or UE1 or UE4) in method 600. Furthermore, each unit in the communication device 10 and the other operations and / or functions described above are respectively for implementing the corresponding processes of methods 100 to 600.

[0215] Wherein, when the communication device 10 is used to perform Figure 2 When performing method 100, the transceiver module 11 can be used to execute step S130 in method 100, and the processing module 12 can be used to execute steps S110 and S120 in method 100.

[0216] When the communication device 10 is used to perform Figure 4 When performing method 200, the transceiver module 11 can be used to execute steps S210, S230 and S240 in method 200.

[0217] When the communication device 10 is used to perform Figure 6 When performing method 300, the transceiver module 11 can be used to execute step S330 in method 300, and the processing module 12 can be used to execute steps S310 and S320 in method 300.

[0218] When the communication device 10 is used to perform Figure 7 When using method 400, the transceiver module 11 can be used to execute steps S410 and S420 in method 400.

[0219] When the communication device 10 is used to perform Figure 9 When using method 500, the transceiver module 11 can be used to execute steps S510 and S520 in method 500.

[0220] For example, the processing module 12 is used to obtain configuration information of multiple sidelink SL carriers; the processing module is also used to determine at least one SL carrier from the multiple SL carriers; the transceiver module 11 is used to send a first message to the second communication device, the first message including information of the at least one SL carrier.

[0221] Optionally, the processing module 12 can be specifically used to: determine one SL carrier as the master carrier PCC from the plurality of SL carriers.

[0222] Optionally, the processing module 12 is further configured to: determine at least one SL carrier as a secondary carrier SCC from the plurality of SL carriers, wherein the PCC carries control information, and the control information is used to schedule the resources for transmitting data on the SCC.

[0223] Optionally, the transceiver module is specifically configured to: receive a second message sent by the base station, the second message including information about the at least one SL carrier; and the processing module is specifically configured to: determine the at least one SL carrier based on the second message.

[0224] Optionally, the processing module 12 is specifically used to: determine at least one SL carrier that satisfies a first preset rule among the plurality of SL carriers.

[0225] Optionally, the first preset rule includes: the reference signal received power (RSPR) is greater than a first threshold; and / or the channel busy ratio (CBR) is less than a second threshold.

[0226] Optionally, the processing module 12 is further configured to: acquire link measurement information of a first SL carrier, wherein the first SL carrier is any one of the at least one SL carrier; and update the first SL carrier when the link measurement information of the first SL carrier does not meet the second preset rule.

[0227] Optionally, the second preset rule includes: the reference signal reception quality (RSRQ) is greater than a third threshold; and / or the received signal strength indication (RSSI) is greater than a fourth threshold.

[0228] Optionally, the processing module 12 is specifically used to: monitor the link information of the first SL carrier to obtain first measurement information; the transceiver module is specifically used to: receive second measurement information from the second communication device, wherein the second measurement information is the link measurement information obtained by the second communication device monitoring the link information of the first SL carrier.

[0229] Optionally, the transceiver module 11 is further configured to: send a third message to the base station, the third message including information about the at least one SL carrier.

[0230] Optionally, the transceiver module 11 is further configured to: send first information to the second communication device at the location of the first physical side crosslink shared channel (PSSCH) resource, wherein the location of the first PSSCH resource is on the first SCC, and the first SCC is any one of the SCCs; and receive hybrid automatic repeat request (HARQ) feedback information of the first information at the location of the first physical side crosslink feedback channel (PSFCH) resource, wherein the location of the first PSSCH resource is determined based on the location of the first PSSCH resource, and the location of the first PSSCH resource is on the first SCC.

[0231] Optionally, the transceiver module 11 is further configured to: send second information to the second communication device at the location of the second PSSCH resource, the location of the second PSSCH resource being on the second SCC, the second SCC being any one of the SCCs; receive HARQ feedback information of the second information at the location of the second PSFCH resource; the processing module is further configured to: determine the location of the second PSFCH resource, the location of the second PSFCH resource being on the PCC.

[0232] Optionally, the information of the at least one SL carrier includes the index of the second SCC and the identifier of the resource pool in which the second PSSCH is located.

[0233] Optionally, the processing module 12 is specifically configured to: determine the location of the second PSFCH resource based on the location of the second PSSCH resource, and at least one of the index of the second SCC and the resource pool identifier of the second PSSCH; or determine the location of the second PSFCH resource based on the location of the physical side link control channel PSCCH resource, wherein the PSCCH resource carries an SCI indicating the location of the second PSSCH resource, and the location of the PSCCH resource is on the PCC.

[0234] Optionally, the PSCCH resource and the second PSFCH resource are in the same resource pool.

[0235] Optionally, the processing module 12 is further configured to: determine the time for switching between the first frequency band and the second frequency band as a first switching time, wherein the first frequency band and the second frequency band are the frequency bands of the PCC and the third SCC, respectively, and the third SCC is any one of the SCCs; the transceiver module 11 is further configured to: receive a fourth message sent by the second communication device, wherein the fourth message includes a second switching time, wherein the second switching time is the time for the second communication device to switch between the first frequency band and the second frequency band; the processing module is further configured to: determine that the time interval is not less than the maximum value of the first switching time and the second switching time, wherein the time interval is the time interval between the end time of the first resource and the start time of the second resource, wherein the first resource belongs to the first frequency band, the second resource belongs to the second frequency band, and the first resource is in the timing sequence before the second resource.

[0236] Optionally, the first resource includes resources used by the PSCCH, the second resource includes resources used by the PSSCH, and the SCI carried on the PSCCH is used to indicate the location of the resources used by the PSSCH.

[0237] Figure 18 This is a schematic block diagram of a communication device provided in an embodiment of this application. As shown in the figure, the communication device 20 may include a transceiver module 21 and a processing module 22.

[0238] In one possible design, the communication device 20 may correspond to the second communication device in the above method embodiment.

[0239] For example, the communication device 20 may correspond to the second communication device (or UE2 or UE5) in methods 100 to 600 according to embodiments of this application. The communication device 20 may include functions for performing... Figure 2 Method 100 or Figure 4 Method 200 or Figure 6 Method 300 Figure 7 Method 400 or Figure 9 Method 500 or Figure 14 The module of the method executed by the second communication device (or UE2 or UE5) in method 600. Furthermore, each unit in the communication device 20 and the other operations and / or functions described above are respectively for implementing the corresponding processes of methods 100 to 600.

[0240] Wherein, when the communication device 20 is used to perform Figure 2 When using method 100, the transceiver module 21 can be used to execute step S130 in method 100.

[0241] When the communication device 20 is used to perform Figure 4When using method 200, the transceiver module 21 can be used to execute step S230 in method 200.

[0242] When the communication device 20 is used to perform Figure 6 When performing method 300, the transceiver module 21 can be used to execute step S330 in method 300, and the processing module 22 can be used to execute step S330 in method 300.

[0243] When the communication device 20 is used to perform Figure 7 When using method 400, the transceiver module 21 can be used to execute steps S410 and S420 in method 400.

[0244] When the communication device 20 is used to perform Figure 9 When using method 500, the transceiver module 21 can be used to execute steps S510 and S520 in method 500.

[0245] For example, transceiver module 21 is configured to receive a first message sent by a first communication device, the first message including configuration information of at least one sidelink SL carrier, the at least one SL carrier being determined by the first communication device from a plurality of SL carriers.

[0246] Optionally, when the first message includes configuration information for an SL carrier, the configuration information for the SL carrier is the configuration information for the main carrier PCC.

[0247] Optionally, when the first message includes configuration information for at least two SL carriers, the at least two SL carriers include a primary carrier PCC, and the SL carriers other than the PCC are secondary carriers SCC. The PCC carries control information, which is used to schedule resources for transmitting data on the SCC.

[0248] Optionally, the processing module 22 is further configured to: obtain second measurement information by monitoring the link information of the first SL carrier, wherein the first SL carrier is any one of the at least one SL carrier; and send the second measurement information to the first communication device, wherein the second measurement information is used to instruct the first communication device to update the first SL carrier that does not meet the second preset rule.

[0249] Optionally, the second preset rule includes: the reference signal reception quality (RSRQ) is greater than a third threshold; and / or the received signal strength indication (RSSI) is greater than a fourth threshold.

[0250] Optionally, the transceiver module 21 is further configured to receive the first information sent by the first communication device at the location of the first physical side crosslink shared channel (PSSCH) resource, wherein the location of the first PSSCH resource is on the first SCC, and the first SCC is any one of the SCCs; the transceiver module is further configured to send the hybrid automatic repeat request (HARQ) feedback information of the first information at the location of the first PSFCH resource, wherein the location of the first PSFCH resource is determined according to the location of the first PSSCH resource, and the location of the first PSFCH resource is on the first SCC.

[0251] Optionally, the transceiver module 21 is further configured to: receive second information sent by the first communication device at the location of the second physical side cross link shared channel (PSSCH) resource, wherein the second PSSCH is on the second SCC, and the second SCC is any one of the SCCs; the processing module is further configured to: determine the location of the second PSFCH resource, wherein the location of the second PSFCH resource is on the PCC; the transceiver module is further configured to: send HARQ feedback information of the second information at the location of the second PSFCH resource.

[0252] Optionally, the information of the at least one SL carrier includes the index of the second SCC and the identifier of the resource pool in which the second PSSCH is located.

[0253] Optionally, the processing module 22 is specifically configured to: determine the location of the PSFCH resource based on at least one of the location of the second PSSCH resource, the index of the second SCC, and the resource pool identifier of the second PSSCH; or determine the location of the second PSFCH resource based on the location of the physical side link control channel PSCCH resource, wherein the PSCCH resource carries an SCI indicating the location of the second PSSCH resource, and the location of the PSCCH resource is on the PCC.

[0254] Optionally, the PSCCH resource and the second PSFCH resource are in the same resource pool.

[0255] Optionally, the processing module 22 is further configured to: determine the switching time between the first frequency band and the second frequency band as the second switching time, wherein the first frequency band and the second frequency band are the frequency bands of the PCC and the third SCC, respectively, and the third SCC is any one of the SCCs; the transceiver module 21 is further configured to: send a fourth message to the first communication device, the fourth message including the second switching time; transmit messages between the first resource and the second resource and the first communication device, wherein the first resource belongs to the first frequency band, the second resource belongs to the second frequency band, and the first resource is in the timing sequence of the second resource, and the time interval between the end time of the first resource and the start time of the second resource is not less than the maximum value of the first switching time and the second switching time, wherein the first switching time is the time during which the first communication device switches between the first frequency band and the second frequency band.

[0256] Optionally, the first resource includes resources used by the PSSCH, the second resource includes resources used by the PSSCH, and the SCI carried on the PSCCH is used to indicate the location of the resources used by the PSSCH.

[0257] Figure 19 This is a schematic block diagram of a communication device provided in an embodiment of this application. As shown in the figure, the communication device 30 may include a transceiver module 31 and a processing module 32.

[0258] In one possible design, the communication device 30 may correspond to the base station in the above method embodiment.

[0259] For example, the communication device 30 may correspond to a base station in the method 200 according to an embodiment of this application, and the communication device 30 may include tools for performing... Figure 4 The module in method 200 is the base station that executes the method. Furthermore, each unit in the communication device 30 and the aforementioned other operations and / or functions are respectively for implementing... Figure 4 The corresponding process of method 200 in the middle.

[0260] Wherein, when the communication device 30 is used to perform Figure 4 When using method 200, the transceiver module 31 can be used to execute steps S210 and S240 in method 200.

[0261] For example, transceiver module 31 is configured to send a second message to a first communication device, the second message including configuration information of at least one sidelink SL carrier, the second message being used to instruct the first communication device to determine at least one SL carrier for communicating with the second communication device.

[0262] Optionally, the information of the at least one SL carrier includes the configuration information of the primary carrier PCC.

[0263] Optionally, the information of the at least one SL carrier may also include configuration information of at least one secondary carrier SCC, and PCC bearer control information, which is used to schedule resources for transmitting data on the SCC.

[0264] Optionally, the transceiver module 31 is further configured to: receive a third message sent by the first communication device, the third message including information of at least one SL carrier.

[0265] According to the aforementioned method, Figure 20 A schematic diagram of the communication device 40 provided in the embodiments of this application is shown below. Figure 20 As shown, the device 40 can be a device that performs unicast communication via an SL carrier, and can be various handheld devices, vehicle-mounted devices, vehicle-mounted communication devices, vehicle-mounted communication chips, roadside units or communication devices in roadside units with wireless communication functions, wearable devices, computing devices or other processing devices connected to a wireless modem, as well as various forms of terminals, mobile stations (MS), terminals, user equipment (UE), soft terminals, etc.

[0266] The device 40 may include a processor 41 (which can also be understood as an example of a processing module) and a memory 42. The memory 42 is used to store instructions, and the processor 41 is used to execute the instructions stored in the memory 42 to cause the device 40 to perform, for example... Figure 2 , Figure 4 , Figure 6 , Figure 7 , Figure 9 or Figure 14 The steps performed by the communication device in the corresponding method.

[0267] Furthermore, the device 40 may also include an input port 43 (i.e., an example of a transceiver module) and an output port 44 (i.e., another example of a transceiver module). Furthermore, the processor 41, memory 42, input port 43, and output port 44 can communicate with each other through internal connection paths to transmit control and / or data signals. The memory 32 is used to store computer programs, and the processor 41 can be used to call and run the computer program from the memory 42 to control the input port 43 to receive signals and control the output port 54 to send signals, thus completing the steps of the terminal device in the above method. The memory 42 can be integrated into the processor 41 or disposed separately from the processor 41.

[0268] Optionally, if the communication device 40 is a communication equipment, the input port 43 is a receiver, and the output port 44 is a transmitter. The receiver and transmitter can be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as transceivers.

[0269] Optionally, if the communication device 40 is a chip or circuit, the input port 43 is an input interface and the output port 44 is an output interface.

[0270] As one implementation method, the functions of input port 43 and output port 44 can be implemented using transceiver circuits or dedicated transceiver chips. Processor 41 can be implemented using dedicated processing chips, processing circuits, processors, or general-purpose chips.

[0271] As another implementation method, the communication device provided in this application embodiment can be implemented using a general-purpose computer. The program code that implements the functions of processor 41, input port 43, and output port 44 is stored in memory 42, and the general-purpose processor implements the functions of processor 41, input port 43, and output port 44 by executing the code in memory 42.

[0272] Each module or unit in the communication device 40 can be used to perform the various actions or processes performed by the device for SL carrier management in the above method. Here, to avoid redundancy, its detailed description is omitted.

[0273] For the concepts, explanations, detailed descriptions, and other steps related to the technical solutions provided in the embodiments of this application involved in the device 40, please refer to the descriptions of these contents in the foregoing methods or other embodiments, which will not be repeated here.

[0274] According to the aforementioned method, Figure 21 A schematic diagram of the communication device 50 provided in the embodiments of this application is shown below. Figure 21 As shown, the device 50 can be a network device that performs SL resource allocation or adjustment, including network elements with access management functions, such as AMF.

[0275] The device 50 may include a processor 51 (i.e., an example of a processing module) and a memory 52. ​​The memory 52 is used to store instructions, and the processor 51 is used to execute the instructions stored in the memory 52 to cause the device 50 to perform, as... Figure 4 The steps performed in the corresponding method for SL carrier management.

[0276] Furthermore, the device 50 may also include an input port 53 (i.e., an example of a transceiver module) and an output port 54 (i.e., another example of a transceiver module). Furthermore, the processor 51, memory 52, input port 53, and output port 54 can communicate with each other through internal connection paths to transmit control and / or data signals. The memory 62 is used to store computer programs, and the processor 51 can be used to call and run the computer programs from the memory 52 to control the input port 53 to receive signals and control the output port 54 to send signals, thus completing the base station steps in the above method. The memory 52 can be integrated into the processor 51 or disposed separately from the processor 51.

[0277] Optionally, if the communication device 50 is a communication equipment, the input port 53 is a receiver, and the output port 54 is a transmitter. The receiver and transmitter can be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as transceivers.

[0278] Optionally, if the communication device 50 is a chip or circuit, the input port 53 is an input interface and the output port 54 is an output interface.

[0279] As one implementation method, the functions of input port 53 and output port 54 can be implemented using transceiver circuits or dedicated transceiver chips. Processor 51 can be implemented using dedicated processing chips, processing circuits, processors, or general-purpose chips.

[0280] As another implementation method, the communication device provided in this application embodiment can be implemented using a general-purpose computer. The program code that implements the functions of processor 51, input port 53, and output port 54 is stored in memory 52, and the general-purpose processor implements the functions of processor 51, input port 53, and output port 54 by executing the code in memory 52.

[0281] Each module or unit in the communication device 50 can be used to perform the actions or processes performed by the device (i.e., the base station) that manages the SL carrier in the above method. Here, to avoid redundancy, its detailed description is omitted.

[0282] For the concepts, explanations, detailed descriptions, and other steps related to the technical solutions provided in the embodiments of this application involved in the device 60, please refer to the descriptions of these contents in the foregoing methods or other embodiments, which will not be repeated here.

[0283] Figure 22 This is a schematic diagram of a communication device 600 provided in this application. For ease of explanation, Figure 21 Only the main components of the communication device are shown. For example... Figure 22 As shown, the communication device 600 includes a processor, a memory, a control circuit, an antenna, and input / output devices.

[0284] The processor is primarily used to process communication protocols and data, control the entire terminal device, execute software programs, and process the data within those programs. For example, it supports the terminal device in performing the actions described in the embodiments of the transmission precoding matrix instruction method. The memory is primarily used to store software programs and data, such as the codebook described in the embodiments above. The control circuit is primarily used for converting baseband signals to radio frequency signals and processing radio frequency signals. The control circuit and antenna together can also be called a transceiver, primarily used for transmitting and receiving radio frequency signals in the form of electromagnetic waves. Input / output devices, such as touchscreens, displays, and keyboards, are primarily used to receive user input data and output data to the user.

[0285] When the communication device is powered on, the processor can read the software program from the storage unit, interpret and execute the software program's instructions, and process the software program's data. When data needs to be transmitted wirelessly, the processor performs baseband processing on the data to be transmitted and outputs the baseband signal to the radio frequency (RF) circuit. The RF circuit then processes the baseband signal and transmits the RF signal outward as electromagnetic waves through the antenna. When data is sent to the terminal device, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor. The processor converts the baseband signal back into data and processes the data.

[0286] Those skilled in the art will understand that, for ease of explanation, Figure 22 Only one memory and processor are shown. In actual terminal devices, multiple processors and memories may exist. Memory can also be called storage medium or storage device, etc., and this application embodiment does not limit this.

[0287] As an optional implementation, the processor may include a baseband processor and a central processing unit (CPU). The baseband processor is mainly used to process communication protocols and communication data, while the CPU is mainly used to control the entire terminal device, execute software programs, and process the data of the software programs. Figure 21The processor in the device integrates the functions of a baseband processor and a central processing unit (CPU). Those skilled in the art will understand that the baseband processor and CPU can also be independent processors interconnected via technologies such as buses. It will also be understood that a terminal device can include multiple baseband processors to adapt to different network standards, and multiple CPUs to enhance its processing capabilities. The various components of the terminal device can be connected via various buses. The baseband processor can also be described as a baseband processing circuit or a baseband processing chip. Similarly, the CPU can be described as a central processing circuit or a central processing chip. The function of processing communication protocols and communication data can be built into the processor or stored as a software program in a storage unit, with the processor executing the software program to implement the baseband processing function.

[0288] like Figure 22 As shown, the communication device 600 includes a transceiver unit 610 and a processing unit 620. The transceiver unit can also be referred to as a transceiver, transceiver device, or transceiver apparatus. Optionally, the device in the transceiver unit 610 used to implement the receiving function can be considered as a receiving unit, and the device in the transceiver unit 610 used to implement the transmitting function can be considered as a transmitting unit; that is, the transceiver unit 610 includes a receiving unit and a transmitting unit. For example, the receiving unit can also be referred to as a receiver, receiver circuit, or receiving device, and the transmitting unit can be referred to as a transmitter, transmitter, or transmitting circuit.

[0289] Figure 22 The terminal device shown can perform the actions performed by the communication device in methods 100 to 600 described above. Here, to avoid redundancy, its detailed description is omitted.

[0290] It should be understood that in the embodiments of this application, the processor can be a central processing unit (CPU), or it can be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor.

[0291] It should also be understood that the memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of random access memory (RAM) are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate synchronous DRAM (DDR SDRAM), enhanced synchronous DRAM (ESDRAM), synchronous linked DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0292] The above embodiments can be implemented, in whole or in part, by software, hardware, firmware, or any other combination thereof. When implemented using software, the above embodiments can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more sets of available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. A semiconductor medium can be a solid-state drive.

[0293] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0294] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0295] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative; for example, the division of units is merely a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0296] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs. Furthermore, the functional units in the various embodiments of this application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. If the function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory, random access memory, magnetic disks, or optical disks.

[0297] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A sidelink carrier management method, characterized in that, include: The first communication device receives configuration information from multiple sidelink SL carriers from the base station; The first communication device determines one SL carrier as the master carrier PCC from the plurality of SL carriers; The first communication device determines at least one SL carrier as a secondary carrier SCC from the plurality of SL carriers. The PCC carries control information, which is used to schedule the resources for transmitting data on the SCC. The first communication device sends a first message to the second communication device. The first message includes information about the PCC and information about the SCC. The connection between the first communication device and the second communication device is a unicast connection. The first communication device sends a third message to the base station, the third message including information about the PCC and information about the SCC.

2. The method according to claim 1, characterized in that, The method further includes: The first communication device sends first information to the second communication device at the location of the first physical side cross link shared channel (PSSCH) resource, where the location of the first PSSCH resource is on the first SCC, and the first SCC is any one of the SCCs. The first communication device receives the Hybrid Automatic Repeat Request (HARQ) feedback information of the first information at the location of the first physical side link feedback channel (PSFCH) resource. The location of the first PSFCH resource is determined based on the location of the first PSSCH resource, and the location of the first PSFCH resource is on the first SCC.

3. The method according to claim 1, characterized in that, The method further includes: The first communication device sends second information to the second communication device at the location of the second PSSCH resource, the location of the second PSSCH resource being on the second SCC, and the second SCC being any one of the SCCs; The first communication device determines the location of the second PSFCH resource, which is located on the PCC; The first communication device receives the HARQ feedback information of the second information at the location of the second PSFCH resource.

4. The method according to claim 3, characterized in that, The SCC information includes the index of the second SCC and the identifier of the resource pool in which the second PSSCH is located.

5. The method according to claim 4, characterized in that, The first communication device determines the location of the second PSFCH resource, including: The first communication device determines the location of the second PSFCH resource based on at least one of the location of the second PSSCH resource, the index of the second SCC, and the resource pool identifier of the second PSSCH; or The first communication device determines the location of the second PSFCH resource based on the location of the physical side cross link control channel (PSCCH) resource. The PSCCH resource carries an SCI indicating the location of the second PSFCH resource, and the location of the PSCCH resource is on the PCC.

6. The method according to claim 5, characterized in that, The PSCCH resource and the second PSFCH resource are in the same resource pool.

7. The method according to any one of claims 1 to 6, characterized in that, The method further includes: The first communication device determines the time for switching between the first frequency band and the second frequency band as the first switching time, where the first frequency band and the second frequency band are the frequency bands of the PCC and the third SCC, respectively, and the third SCC is any one of the SCCs; The first communication device receives a fourth message sent by the second communication device, the fourth message including a second switching time, the second switching time being the time during which the second communication device switches between the first frequency band and the second frequency band; The first communication device determines that the time interval is not less than the maximum value of the first switching time and the second switching time. The time interval is the time interval between the end time of the first resource and the start time of the second resource. The first resource belongs to the first frequency band, the second resource belongs to the second frequency band, and the first resource is in the timing sequence of the second resource.

8. The method according to claim 7, characterized in that, The first resource includes resources used by the PSCCH, the second resource includes resources used by the PSSCH, and the SCI carried on the PSCCH is used to indicate the location of the resources used by the PSSCH.

9. A sidelink carrier management method, characterized in that, include: The second communication device receives a first message sent by the first communication device. The first message includes information about the primary carrier PCC and the secondary carrier SCC. The PCC and the SCC are determined by the first communication device from multiple SL carriers. The PCC includes one SL carrier, and the SCC includes at least one SL carrier. The PCC carries control information, which is used to schedule the resources for transmitting data on the SCC. The connection between the first communication device and the second communication device is a unicast connection.

10. The method according to claim 9, characterized in that, The method further includes: The second communication device receives the first information sent by the first communication device at the location of the first physical side cross link shared channel PSSCH resource, the location of the first PSSCH resource is on the first SCC, and the first SCC is any one of the SCCs; The second communication device sends the Hybrid Automatic Repeat Request (HARQ) feedback information of the first information at the location of the first PSFCH resource. The location of the first PSFCH resource is determined according to the location of the first PSSCH resource, and the location of the first PSFCH resource is on the first SCC.

11. The method according to claim 9, characterized in that, The method further includes: The second communication device receives the second information sent by the first communication device at the location of the second physical side cross link shared channel (PSSCH) resource. The second PSSCH is on the second SCC, and the second SCC is any one of the SCCs. The second communication device determines the location of the second PSFCH resource, which is located on the PCC; The second communication device sends the HARQ feedback information of the second information at the location of the second PSFCH resource.

12. The method according to claim 11, characterized in that, The SCC information includes the index of the second SCC and the identifier of the resource pool in which the second PSSCH is located.

13. The method according to claim 12, characterized in that, The second communication device determines the location of the second PSFCH resource, including: The second communication device determines the location of the PSFCH resource based on at least one of the location of the second PSSCH resource, the index of the second SCC, and the resource pool identifier of the second PSSCH; or The second communication device determines the location of the second PSFCH resource based on the location of the physical side link control channel (PSCCH) resource. The PSCCH resource carries an SCI indicating the location of the second PSFCH resource, and the location of the PSCCH resource is on the PCC.

14. The method according to claim 13, characterized in that, The PSCCH resource and the second PSFCH resource are in the same resource pool.

15. The method according to any one of claims 9 to 14, characterized in that, The method further includes: The second communication device determines the time for switching between the first frequency band and the second frequency band as the second switching time, where the first frequency band and the second frequency band are the frequency bands of the PCC and the third SCC, respectively, and the third SCC is any one of the SCCs; The second communication device sends a fourth message to the first communication device, the fourth message including the second switching time; The second communication device transmits messages with the first communication device through the first resource and the second resource. The first resource belongs to the first frequency band, the second resource belongs to the second frequency band, and the first resource is in the timing sequence of the second resource. The time interval between the end time of the first resource and the start time of the second resource is not less than the maximum value of the first switching time and the second switching time. The first switching time is the time for the first communication device to switch between the first frequency band and the second frequency band.

16. The method according to claim 15, characterized in that, The first resource includes resources used by the PSCCH, the second resource includes resources used by the PSSCH, and the SCI carried on the PSCCH is used to indicate the location of the resources used by the PSSCH.

17. A sidelink carrier management method, characterized in that, include: The base station sends configuration information for multiple sidelink SL carriers to the first communication device; The base station receives a message from the first communication device. The message includes information about the primary carrier PCC and the secondary carrier SCC for unicast communication between the first and second communication devices. The PCC and the SCC belong to the plurality of SL carriers. The PCC includes one SL carrier, and the SCC includes at least one SL carrier. The PCC carries control information, which is used to schedule the resources for transmitting data on the SCC.

18. A sidelink carrier management device, characterized in that, It includes modules or units for performing the method as described in any one of claims 1 to 8, or modules or units for performing the method as described in any one of claims 9 to 16, or modules or units for performing the method as described in claim 17.

19. A communication device, characterized in that, include: A processor for executing a computer program stored in a memory, such that the communication device performs the communication method of any one of claims 1 to 8, or the communication method of any one of claims 9 to 16, or the communication method of claim 17.

20. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed on a computer, causes the computer to perform the communication method of any one of claims 1 to 8, or the communication method of any one of claims 9 to 16, or the communication method of claim 17.

21. A chip system, characterized in that, include: A processor for retrieving and running a computer program from memory, causing a communication device on which the chip system is installed to perform the communication method of any one of claims 1 to 8, or the communication method of any one of claims 9 to 16, or the communication method of claim 17.

22. A communication system, characterized in that, The communication system includes: a station for performing the method as claimed in claim 17 and a first communication device for performing the method as claimed in any one of claims 1 to 8.

23. The communication system according to claim 22, characterized in that, The communication system further includes a second communication device for performing the method as described in any one of claims 9 to 16.

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