Method for determining carrier, first terminal, second terminal and network equipment

Abstract

The present disclosure relates to a method for determining a carrier, a first terminal, a second terminal, and a network device, the method comprising: determining a first carrier for carrier aggregation; first indication information is sent to a second terminal, the first indication information is used for indicating the first carrier, and the second terminal is a terminal establishing unicast connection with the first terminal; and sending the sidelink data to the second terminal through the first carrier. Therefore, the sending terminal can determine the carrier used for carrier aggregation and used for unicast communication between the sending terminal and the receiving terminal, notify the receiving terminal, and send the sidelink data to the receiving terminal through the carrier used for carrier aggregation, so that the receiving terminal can receive the sidelink data through the carrier used for carrier aggregation. Carrier waves monitored by a receiving terminal can be reduced, and electric energy is saved.

Description

Method for determining carrier, first terminal, second terminal, and network device Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a method for determining a carrier, a first terminal, a second terminal, and a network device. Background Art

[0002] In order to meet the requirements of single-user peak rate and system capacity improvement, the system transmission bandwidth can be increased, such as by adopting carrier aggregation (CA). SL communication can use CA technology.

[0003] Summary of the Invention

[0004] The method disclosed herein can be used to solve the technical problem of “how to determine the carrier used for carrier aggregation between a transmitting terminal and a receiving terminal”.

[0005] The embodiments of the present disclosure provide a method for determining a carrier, a first terminal, a second terminal, and a network device.

[0006] According to a first aspect of an embodiment of the present disclosure, a method for determining a carrier is provided, including:

[0007] determining a first carrier for carrier aggregation;

[0008] Sending first indication information to a second terminal, where the first indication information is used to indicate the first carrier, and the second terminal is a terminal that establishes a unicast connection with the first terminal;

[0009] Sidelink data is sent to the second terminal via the first carrier.

[0010] According to a second aspect of an embodiment of the present disclosure, a method for determining a carrier is provided, which is performed by a second terminal. The method includes:

[0011] receiving first indication information sent by a first terminal, where the first indication information is used to indicate a first carrier used for carrier aggregation, and the second terminal is a terminal that establishes a unicast connection with the first terminal;

[0012] The sidelink data sent by the first terminal is received through the first carrier.

[0013] According to a third aspect of an embodiment of the present disclosure, a method for determining a carrier is provided, which is performed by a network device. The method includes:

[0014] Receive one or more of the second indication information, the third indication information, and the fourth indication information sent by the first terminal, where the second indication information is used to indicate the second carrier supported by the second terminal, the third indication information is used to indicate the third carrier preferred by the second terminal, and the fourth indication information is used to instruct the second terminal to reject the first indication information. The first indication information is used to indicate the first carrier used for carrier aggregation, and the first carrier is used by the first terminal to send sidelink data to the second terminal.

[0015] According to a fourth aspect of an embodiment of the present disclosure, a method for determining a carrier is provided, the method including:

[0016] A first terminal determines a first carrier for carrier aggregation; sends first indication information to a second terminal, where the first indication information is used to indicate the first carrier, and the second terminal is a terminal that establishes a unicast connection with the first terminal; and sends sidelink data to the second terminal via the first carrier.

[0017] The second terminal receives the first indication information sent by the first terminal and receives the sidelink data sent by the first terminal through the first carrier.

[0018] According to a fifth aspect of an embodiment of the present disclosure, a first terminal is provided, including:

[0019] a processing module, configured to determine a first carrier for carrier aggregation;

[0020] The transceiver module is used to send first indication information to the second terminal, where the first indication information is used to indicate the first carrier, and the second terminal is a terminal that establishes a unicast connection with the first terminal; and send sidelink data to the second terminal via the first carrier.

[0021] According to a sixth aspect of an embodiment of the present disclosure, a second terminal is provided, including:

[0022] The transceiver module is used to receive first indication information sent by a first terminal, where the first indication information is used to indicate a first carrier used for carrier aggregation, and the second terminal is a terminal that establishes a unicast connection with the first terminal; and receive sidelink data sent by the first terminal through the first carrier.

[0023] According to a seventh aspect of an embodiment of the present disclosure, a network device is provided, including:

[0024] A transceiver module is used to receive one or more of a second indication information, a third indication information, and a fourth indication information sent by a first terminal, where the second indication information is used to indicate a second carrier supported by the second terminal, the third indication information is used to indicate a third carrier that the second terminal preferably supports, and the fourth indication information is used to instruct the second terminal to reject the first indication information. The first indication information is used to indicate a first carrier used for carrier aggregation, and the first carrier is used by the first terminal to send sidelink data to the second terminal.

[0025] According to an eighth aspect of an embodiment of the present disclosure, a communication device is provided, including:

[0026] one or more processors;

[0027] The communication device is used to execute the method for determining the carrier described in the embodiment of the first aspect.

[0028] According to a ninth aspect of an embodiment of the present disclosure, a second terminal is provided, including:

[0029] one or more processors;

[0030] The communication device is used to execute the method for determining the carrier described in the embodiment of the second aspect.

[0031] According to a tenth aspect of an embodiment of the present disclosure, a communication device is provided, including:

[0032] one or more processors;

[0033] The communication device is used to execute the method for determining the carrier described in the embodiment of the third aspect.

[0034] According to the eleventh aspect of the embodiments of the present disclosure, a communication system is proposed, including a first terminal, a second terminal and a network device, wherein the first terminal is configured to implement the method for determining the carrier described in the embodiment of the first aspect, the second terminal is configured to implement the method for determining the carrier described in the embodiment of the second aspect, and the network device is configured to implement the method for determining the carrier described in the embodiment of the third aspect.

[0035] According to the twelfth aspect of an embodiment of the present disclosure, a storage medium is proposed, which stores instructions. When the instructions are executed on a communication device, the communication device executes the method for determining a carrier as described in any one of the first aspect, the second aspect, and the third aspect.

[0036] In an embodiment of the present disclosure, a first terminal may determine a first carrier for carrier aggregation and notify a second terminal with which the first terminal has a unicast connection. Thus, the transmitting terminal may determine a carrier for carrier aggregation to be used by the transmitting and receiving terminals for unicast communication, notify the receiving terminal, and then send sidelink data to the receiving terminal via the carrier for carrier aggregation. The receiving terminal can then receive the sidelink data via the carrier for carrier aggregation, thereby reducing the number of carriers monitored by the receiving terminal and saving power. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above and / or additional aspects and advantages of the present disclosure will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0038] FIG1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure;

[0039] 2A-2B are interactive schematic diagrams illustrating a method for determining a carrier according to an embodiment of the present disclosure;

[0040] 3A-3G are flowcharts illustrating a method for determining a carrier according to an embodiment of the present disclosure;

[0041] 4A-4D are flowcharts illustrating a method for determining a carrier according to an embodiment of the present disclosure;

[0042] 5A-5D are interactive schematic diagrams illustrating a method for determining a carrier according to an embodiment of the present disclosure;

[0043] FIG6 is an interactive schematic diagram illustrating a method for determining a carrier according to an embodiment of the present disclosure;

[0044] FIG7A is a schematic structural diagram of a first terminal proposed in an embodiment of the present disclosure;

[0045] FIG7B is a schematic structural diagram of a second terminal proposed in an embodiment of the present disclosure;

[0046] FIG7C is a schematic diagram of the structure of a network device proposed in an embodiment of the present disclosure;

[0047] FIG8A is a schematic structural diagram of a communication device proposed in an embodiment of the present disclosure;

[0048] FIG8B is a schematic diagram of the structure of the chip proposed in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0049] The embodiments of the present disclosure provide a method for determining a carrier, a first terminal, a second terminal, and a network device.

[0050] In a first aspect, an embodiment of the present disclosure provides a method for determining a carrier, performed by a first terminal, the method including:

[0051] determining a first carrier for carrier aggregation;

[0052] Sending first indication information to a second terminal, where the first indication information is used to indicate the first carrier, and the second terminal is a terminal that establishes a unicast connection with the first terminal;

[0053] Sidelink data is sent to the second terminal via the first carrier.

[0054] In the above embodiment, the first terminal can determine the first carrier for carrier aggregation and notify the second terminal, which has a unicast connection with the first terminal, of the first carrier. Thus, the transmitting terminal can determine the carrier for carrier aggregation to be used for unicast communication between the transmitting terminal and the receiving terminal, notify the receiving terminal, and then send sidelink data to the receiving terminal via the carrier for carrier aggregation. The receiving terminal can then receive the sidelink data via the carrier for carrier aggregation, reducing the number of carriers monitored by the receiving terminal and saving power.

[0055] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0056] Receive one or more of second indication information, third indication information, and fourth indication information sent by the second terminal, where the second indication information is used to indicate a second carrier supported by the second terminal, the third indication information is used to indicate a third carrier that the second terminal preferably supports, and the fourth indication information is used to instruct the second terminal to reject the first indication information.

[0057] In the above embodiment, the first terminal can obtain the capability information of the second terminal, and when the second terminal rejects the carrier determined by the first terminal for carrier aggregation, it can obtain the corresponding information, so that when the terminal capability is limited, it can determine or re-determine the carrier for carrier aggregation based on the capability information of the second terminal, information of rejecting the first indication information, etc.

[0058] In conjunction with some embodiments of the first aspect, in some embodiments, determining the first carrier for carrier aggregation includes:

[0059] The first carrier is determined or re-determined according to one or more of the second indication information, the third indication information, and the fourth indication information.

[0060] In the above embodiment, the first terminal can determine or redetermine the carrier used for carrier aggregation based on the capability information of the second terminal, information of rejecting the first indication information, etc., thereby ensuring that both the first terminal and the second terminal support the carrier used for carrier aggregation, avoiding the loss of data packets sent by the first terminal to the second terminal, and improving the communication quality.

[0061] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0062] Send one or more of the second indication information, the third indication information, and the fourth indication information to the network device.

[0063] In the above embodiment, the first terminal may also report the second indication information to the network device, so that the network device can obtain capability information of the second terminal, information indicating rejection of the first indication information, and the like.

[0064] In combination with some embodiments of the first aspect, in some embodiments, the first terminal is in a radio resource control (RRC) connected state and the resource allocation mode of the first terminal is a mode of autonomously selecting sending resources.

[0065] In the above embodiment, if the first terminal is in the RRC connected state and autonomously selects the sending resources, the first terminal may report the carriers supported by the second terminal, the preferred supported carriers, and information on rejecting the first indication information to the network device.

[0066] In conjunction with some embodiments of the first aspect, in some embodiments, determining the first carrier for carrier aggregation includes:

[0067] receiving fifth indication information sent by the network device, where the fifth indication information is used to instruct the network device to determine or re-determine the first carrier;

[0068] Determine the first carrier according to the fifth indication information.

[0069] In the above embodiment, the network device can determine or redetermine the carrier used for carrier aggregation and notify the first terminal, so that the first terminal can determine the carrier used for carrier aggregation based on the fifth indication information sent by the network device, saving resources of the first terminal, reducing the carrier monitored by the second terminal, and saving power.

[0070] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0071] Sending request information to the second terminal, where the request information is used to request the second indication information and / or the third indication information.

[0072] In the above embodiment, the first terminal can send a request message to the second terminal to request the carrier supported and the preferred supported carrier of the second terminal. After receiving the request message, the second terminal can send the second indication message and / or the third indication message to the first terminal, thereby improving the accuracy of information sending, reducing the number of interactions between terminals, and saving resources.

[0073] In conjunction with some embodiments of the first aspect, in some embodiments, sending request information to the second terminal includes:

[0074] The resource allocation mode of the first terminal changes, and the request information is sent to the second terminal.

[0075] In the above embodiment, the first terminal can send a request information to the second terminal when the resource allocation mode sends a change, so as to obtain the second terminal's current supported carrier and the current preferred supported carrier when the resource allocation mode changes, so as to determine the carrier used for carrier aggregation, and ensure that the first terminal and the second terminal both support the carrier used for carrier aggregation, so as to avoid the loss of data packets sent by the first terminal to the second terminal due to the limited terminal capabilities, and the carrier supported by the sending terminal and the carrier supported by the receiving terminal are different, thereby improving the communication quality.

[0076] In conjunction with some embodiments of the first aspect, in some embodiments, sending request information to the second terminal includes:

[0077] The resource allocation mode of the first terminal is configured or reconfigured from a mode of network scheduling sending resources to a mode of autonomously selecting sending resources, and the request information is sent to the second terminal.

[0078] In the above embodiment, the first terminal can send a request message to the second terminal when the resource allocation mode is configured or reconfigured from a network-scheduled resource sending mode to an autonomous resource selection mode, thereby obtaining the second terminal's currently supported carrier and the currently preferred supported carrier when the resource allocation mode changes, so as to determine the carrier used for carrier aggregation, and ensure that both the first terminal and the second terminal support the carrier used for carrier aggregation, thereby avoiding the loss of data packets sent by the first terminal to the second terminal due to the limited terminal capabilities, the carrier supported by the sending terminal and the carrier supported by the receiving terminal being different, thereby improving the communication quality.

[0079] In combination with some embodiments of the first aspect, in some embodiments, the supported second carrier includes a carrier that supports sending and / or supports receiving, and the preferred supported third carrier includes a carrier that preferably supports sending and / or preferably supports receiving.

[0080] In the above embodiment, the first terminal can know the carriers supported for sending and / or receiving by the second terminal, and the carriers that the second terminal preferably supports for sending and / or preferably supports for receiving, thereby avoiding the problem of data packet loss or inability to communicate due to limited terminal capabilities, where the carriers supported for sending by the sending terminal and the carriers supported for receiving by the receiving terminal are different.

[0081] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0082] The first terminal does not support transmission on the carrier supported by the second terminal, releases the unicast connection between the first terminal and the second terminal, or uses a single carrier to send sidelink data to the second terminal.

[0083] In the above embodiment, if the first terminal does not support sending on the carrier that the second terminal supports receiving, that is, when the carrier aggregation technology cannot be used for communication, the first terminal can release the unicast connection to avoid continuing to send data and wasting resources, or use a single carrier to send sidelink data to the second terminal to ensure unicast communication between the first terminal and the second terminal.

[0084] In combination with some embodiments of the first aspect, in some embodiments, the resource allocation method of the first terminal is a method of autonomously selecting sending resources.

[0085] In the above embodiment, for a transmitting terminal that allocates resources in an autonomous manner to select transmitting resources, a carrier for carrier aggregation can be determined and notified to the receiving terminal, thereby reducing the carriers monitored by the receiving terminal and saving power.

[0086] In a second aspect, an embodiment of the present disclosure provides a method for determining a carrier, which is performed by a second terminal and includes:

[0087] receiving first indication information sent by a first terminal, where the first indication information is used to indicate a first carrier used for carrier aggregation, and the second terminal is a terminal that establishes a unicast connection with the first terminal;

[0088] The sidelink data sent by the first terminal is received through the first carrier.

[0089] In the above embodiment, the second terminal that has a unicast connection with the first terminal can receive the first indication information sent by the first terminal, so that the second terminal can determine the first carrier for carrier aggregation based on the first indication information, and receive the side link data sent by the first terminal through the first carrier, thereby reducing the carriers monitored by the receiving terminal and saving power.

[0090] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0091] One or more of second indication information, third indication information, and fourth indication information are sent to the first terminal, where the second indication information is used to indicate a second carrier supported by the second terminal, the third indication information is used to indicate a third carrier that the second terminal preferably supports, and the fourth indication information is used to instruct the second terminal to reject the first indication information.

[0092] In the above embodiment, the second terminal can send the carriers supported by itself, the preferred supported carriers, the information of rejecting the first indication information, etc. to the first terminal, so that the second terminal can obtain this information, thereby avoiding the problem of data packet loss or inability to communicate due to the limited terminal capabilities, resulting in the carriers supported by the sending terminal being different from the carriers supported by the receiving terminal, thereby improving the quality of unicast communication.

[0093] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0094] Receive request information sent by the first terminal, where the request information is used to request obtaining the second indication information and / or the third indication information.

[0095] In the above embodiment, the second terminal may send the second indication information and / or the third indication information to the first terminal after receiving the request information sent by the first terminal, thereby improving the accuracy of sending, reducing the number of interactions between terminals, and saving resources.

[0096] In conjunction with some embodiments of the second aspect, in some embodiments, sending one or more of the second indication information, the third indication information, and the fourth indication information to the first terminal includes one or more of the following:

[0097] The second indication information changes compared to the previous second indication information, and the second indication information is sent to the first terminal;

[0098] The third indication information is changed compared to the previous third indication information, and the third indication information is sent to the first terminal.

[0099] In the above embodiment, the second terminal can notify the first terminal of the carrier currently supported by itself when the second carrier supported by itself changes, and notify the first terminal of the carrier currently preferred to be supported when the second carrier supported by itself changes. In this way, the second terminal can promptly notify the first terminal when the carrier supported by itself and / or the preferred carrier supported by itself changes.

[0100] In combination with some embodiments of the second aspect, in some embodiments, the supported second carrier includes a carrier that supports sending and / or supports receiving, and the preferred supported third carrier includes a carrier that preferably supports sending and / or preferably supports receiving.

[0101] In some embodiments, the second terminal can notify the first terminal of the carriers it supports sending and / or supports receiving, and the carriers it prefers to support sending and / or preferably supports receiving, thereby avoiding the problem of data packet loss or inability to communicate due to limited terminal capabilities, where the carriers supported by the sending terminal and the carriers supported by the receiving terminal are different.

[0102] In a third aspect, an embodiment of the present disclosure provides a method for determining a carrier, which is performed by a network device. The method includes:

[0103] Receive one or more of the second indication information, the third indication information, and the fourth indication information sent by the first terminal, where the second indication information is used to indicate the second carrier supported by the second terminal, the third indication information is used to indicate the third carrier preferred by the second terminal, and the fourth indication information is used to instruct the second terminal to reject the first indication information. The first indication information is used to indicate the first carrier used for carrier aggregation, and the first carrier is used by the first terminal to send sidelink data to the second terminal.

[0104] In the above embodiment, the network device can obtain information such as the carriers supported by the second terminal that establishes a unicast connection with the first terminal, the preferred supported carriers, and the carriers rejected for carrier aggregation, thereby facilitating the network device to know the capabilities of the second terminal, whether the second terminal agrees to use the first carrier for unicast communication, and other information.

[0105] In conjunction with some embodiments of the third aspect, in some embodiments, the method further includes:

[0106] Determine or re-determine the first carrier according to one or more of the second indication information, the third indication information, and the fourth indication information;

[0107] Send fifth indication information to the first terminal, where the fifth indication information is used to indicate the first carrier determined or re-determined by the network device.

[0108] In the above embodiment, the network device can determine or redetermine the carrier used for carrier aggregation based on the carrier supported by the second terminal that establishes a unicast connection with the first terminal, the preferred supported carrier, the information of the carrier rejected for carrier aggregation, etc., and notify the first terminal, thereby saving terminal resources, reducing the carrier monitored by the second terminal, and saving power.

[0109] In combination with some embodiments of the third aspect, in some embodiments, the supported second carrier includes a carrier that supports sending and / or supports receiving, and the preferred supported third carrier includes a carrier that preferably supports sending and / or preferably supports receiving.

[0110] In the above embodiment, the network device can learn the carriers supported for sending and / or receiving and the carriers preferred for sending and / or receiving by the second terminal, thereby learning the capability information of the second terminal.

[0111] In a fourth aspect, an embodiment of the present disclosure provides a method for determining a carrier, including:

[0112] A first terminal determines a first carrier for carrier aggregation; sends first indication information to a second terminal, where the first indication information is used to indicate the first carrier, and the second terminal is a terminal that establishes a unicast connection with the first terminal; and sends sidelink data to the second terminal via the first carrier.

[0113] The second terminal receives the first indication information sent by the first terminal and receives the sidelink data sent by the first terminal through the first carrier.

[0114] In the above embodiment, the first terminal can determine the first carrier for carrier aggregation and notify the second terminal, which has a unicast connection with the first terminal, of the first carrier. Thus, the transmitting terminal can determine the carrier for carrier aggregation to be used for unicast communication between the transmitting terminal and the receiving terminal, notify the receiving terminal, and then send sidelink data to the receiving terminal via the carrier for carrier aggregation. The receiving terminal can then receive the sidelink data via the carrier for carrier aggregation, reducing the number of carriers monitored by the receiving terminal and saving power.

[0115] In a fifth aspect, an embodiment of the present disclosure proposes a first terminal, which includes at least one of a transceiver module and a processing module: wherein the first terminal is used to execute the first aspect and the optional implementation method of the first aspect.

[0116] In a sixth aspect, an embodiment of the present disclosure proposes a second terminal, which includes at least one of a transceiver module and a processing module: wherein the second terminal is used to execute the second aspect and the optional implementation method of the second aspect.

[0117] In the seventh aspect, an embodiment of the present disclosure proposes a network device, which includes at least one of a transceiver module and a processing module: wherein the network device is used to execute the third aspect and the optional implementation method of the third aspect.

[0118] In an eighth aspect, an embodiment of the present disclosure proposes a communication device, which includes: one or more processors; wherein the communication device is used to execute the first aspect and the optional implementation method of the first aspect.

[0119] In a ninth aspect, an embodiment of the present disclosure proposes a communication device, which includes: one or more processors; wherein the communication device is used to execute the second aspect and the optional implementation method of the second aspect.

[0120] In a tenth aspect, an embodiment of the present disclosure provides a communication device, wherein the communication device includes:

[0121] one or more processors;

[0122] The communication device is used to execute the third aspect and the optional implementation of the third aspect.

[0123] In the eleventh aspect, an embodiment of the present disclosure proposes a communication system, including a first terminal, a second terminal, and a network device, wherein the first terminal is configured to implement the method described in the first aspect and the optional implementation method of the first aspect, the second terminal is configured to implement the method described in the second aspect, and the network device is configured to implement the method described in the third aspect and the optional implementation method of the third aspect.

[0124] In the twelfth aspect, an embodiment of the present disclosure proposes a storage medium, which stores instructions. When the instructions are executed on a communication device, the communication device executes the method described in the first aspect, the optional implementation of the first aspect, the second aspect, the optional implementation of the second aspect, the third aspect, and the optional implementation of the third aspect.

[0125] In the thirteenth aspect, an embodiment of the present disclosure proposes a program product. When the program product is executed by a communication device, the communication device executes the method described in the first aspect, the optional implementation of the first aspect, the second aspect, the optional implementation of the second aspect, the third aspect, and the optional implementation of the third aspect.

[0126] In the fourteenth aspect, an embodiment of the present disclosure proposes a computer program, which, when running on a computer, enables the computer to execute the method described in the first aspect, the optional implementation of the first aspect, the second aspect, the optional implementation of the second aspect, the third aspect, and the optional implementation of the third aspect.

[0127] In a fifteenth aspect, an embodiment of the present disclosure provides a chip or chip system. The chip or chip system includes a processing circuit configured to execute the method described in accordance with the first aspect, the optional implementation of the first aspect, the second aspect, the optional implementation of the second aspect, the third aspect, and the optional implementation of the third aspect.

[0128] It is understandable that the above-mentioned terminals, communication systems, storage media, program products, computer programs, chips, or chip systems are all used to perform the methods proposed in the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding methods and will not be repeated here.

[0129] The present disclosure provides a method for determining a carrier, a first terminal, a second terminal, and a network device. In some embodiments, the terms "carrier determination method" and "information processing method" and "communication method" are interchangeable; "information transmission device" and "information processing device" and "communication device" are interchangeable; and "information processing system" and "communication system" are interchangeable.

[0130] The embodiments of the present disclosure are not exhaustive and are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0131] In each embodiment of the present disclosure, unless otherwise specified or provided for by logic, the terms and / or descriptions between the embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form a new embodiment based on their inherent logical relationships.

[0132] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0133] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular, such as "a", "an", "the", "above", "said", "the", "the", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun following the article may be understood as a singular expression or a plural expression.

[0134] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0135] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0136] In some embodiments, descriptions such as "at least one of A and B," "A and / or B," "A in one case, B in another case," or "in response to one case A, in response to another case B" may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); and in some embodiments, A and B (both A and B are executed). The above is also applicable when there are more branches such as A, B, and C.

[0137] In some embodiments, "A or B" and other descriptions may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The above is also applicable when there are more branches such as A, B, C, etc.

[0138] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects and do not constitute any restriction on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and no unnecessary restriction should be constituted due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", then the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different; for another example, if the description object is "information", then the "first information" and the "second information" can be the same information or different information, and their contents can be the same or different.

[0139] In some embodiments, “including A,” “comprising A,” “used to indicate A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0140] In some embodiments, terms such as "in response to...", "in response to determining...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0141] In some embodiments, devices, etc. can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. Terms such as "device", "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", and "subject" can be used interchangeably.

[0142] In some embodiments, the terms "access network device (AN device)", "radio access network device (RAN device)", "base station (BS)", "radio base station" "fixed station", "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)", "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "carrier", "component carrier", "bandwidth part (BWP)" and the like may be used interchangeably.

[0143] In some embodiments, the terms "terminal", "terminal device", "user equipment (UE)", "user terminal", "mobile station (MS)", "mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, etc. can be used interchangeably.

[0144] In some embodiments, the access network device, the core network device, or the network device can be replaced by a terminal. For example, the various embodiments of the present disclosure can also be applied to a structure in which the communication between the access network device, the core network device, or the network device and the terminal is replaced by communication between multiple terminals (for example, it can also be called device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, it can also be set as a structure in which the terminal has all or part of the functions of the access network device. In addition, language such as "uplink" and "downlink" can also be replaced by language corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. can be replaced by side channels, and uplinks, downlinks, etc. can be replaced by side links.

[0145] In some embodiments, the terminal may be replaced by an access network device, a core network device, or a network device. In this case, the access network device, the core network device, or the network device may have a structure that has all or part of the functions of the terminal.

[0146] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0147] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0148] Figure 1 is a schematic diagram illustrating the architecture of a communication system according to an embodiment of the present disclosure. As shown in Figure 1, communication system 100 may include a first terminal 101, a second terminal 102, and a network device 103. A communication connection may be established between first terminal 101 and second terminal 102, and SL communication may be performed between first terminal 101 and second terminal 102.

[0149] In some embodiments, the network device 103 may include at least one of an access network device and a core network device.

[0150] In some embodiments, the first terminal 101 or the second terminal 102 includes, for example, a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and at least one of a wireless terminal device in a smart home, but is not limited thereto.

[0151] In some embodiments, the access network device is, for example, a node or device that accesses a terminal to a wireless network. The access network device may include an evolved NodeB (eNB) in a 5G communication system, a next generation evolved NodeB (ng-eNB), a next generation NodeB (gNB), a node B (NB), a home node B (HNB), a home evolved nodeB (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, and at least one of an access node in a WiFi system, but is not limited thereto.

[0152] In some embodiments, the technical solution of the present disclosure can be applied to the Open RAN architecture. In this case, the interfaces between or within the access network devices involved in the embodiments of the present disclosure can be transformed into internal interfaces of the Open RAN, and the processes and information interactions between these internal interfaces can be implemented through software or programs.

[0153] In some embodiments, the access network device can be composed of a centralized unit (CU) and a distributed unit (DU), where the CU can also be called a control unit. The CU-DU structure can be used to split the protocol layer of the access network device, with the functions of some protocol layers centrally controlled by the CU, and the functions of the remaining part or all of the protocol layers distributed in the DU, which is centrally controlled by the CU, but is not limited to this.

[0154] In some embodiments, a core network device may be a single device comprising one or more network elements, or may be a plurality of devices or a group of devices, each comprising all or part of one or more network elements. A network element may be virtual or physical. The core network may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0155] It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution proposed in the embodiment of the present disclosure. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution proposed in the embodiment of the present disclosure is also applicable to similar technical problems.

[0156] The following embodiments of the present disclosure may be applied to the communication system 100 shown in Figure 1, or a portion thereof, but are not limited thereto. The entities shown in Figure 1 are illustrative only. The communication system may include all or part of the entities shown in Figure 1, or may include other entities outside of Figure 1. The number and form of the entities may be arbitrary. The connection relationship between the entities is illustrative only. The entities may be connected or disconnected, and the connection may be in any manner, including direct or indirect, wired or wireless.

[0157] The embodiments of the present disclosure can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), future radio access (FRA), new radio access technology (RAT), new radio (NR), new radio access (NX), future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), Public Land Mobile Network (PLMN) networks, Device-to-Device (D2D) systems, Machine-to-Machine (M2M) systems, Internet of Things (IoT) systems, Vehicle-to-Everything (V2X), systems utilizing other communication methods, and next-generation systems based on and extending these methods. Furthermore, multiple systems may be combined (for example, a combination of LTE or LTE-A with 5G).

[0158] In order to support direct communication between terminals, the SL communication mode is introduced. Optionally, the interface between the terminals can be PC-5 (direct communication interface).

[0159] In some embodiments, the terms "side", "sidelink", "side communication", "sidelink communication", "direct connection", "direct link", "direct communication", "direct link communication" and the like may be used interchangeably.

[0160] In some embodiments, based on the correspondence between the sending terminal and the receiving terminal, three transmission modes are supported on the SL: unicast, multicast, and broadcast.

[0161] In some embodiments, SL communication has two transmission resource allocation methods: one is the network dynamically scheduling transmission resources, and the other is the terminal autonomously selecting transmission resources from a network-configured or pre-configured resource pool. The network scheduling transmission resource method involves the network device dynamically allocating transmission resources on the SL to the terminal based on the terminal's cached data report, while the autonomous transmission resource selection method involves the terminal randomly selecting transmission resources from a network-configured or pre-configured resource pool. Optionally, the network device can configure the specific resource allocation method used by the terminal through RRC signaling.

[0162] In some embodiments, the name of the method for network scheduling to send resources is not limited. For example, the method for network scheduling to send resources may be mode 1 or mode1.

[0163] In some embodiments, the name of the method for autonomously selecting sending resources is not limited. For example, the method for autonomously selecting sending resources may be mode 2 or mode2.

[0164] In some embodiments, the transmitting terminal sends sidelink control information (SCI) on the physical sidelink control channel (PSCCH) and sends a second-stage SCI on the physical sidelink shared channel (PSSCH), which carries the resource location of the transmitted data and the source and destination identifiers, etc.

[0165] Optionally, for a hybrid automatic repeat request (HARQ)-enabled data packet, the receiving terminal performs HARQ acknowledgment (HARQ-ACK) feedback on a physical sidelink feedback channel (PSFCH) for the PSSCH.

[0166] To meet the requirements of single-user peak rate and system capacity improvement, the system transmission bandwidth can be increased, for example, by adopting CA. CA technology can aggregate multiple component carriers (CCs) together, effectively improving the uplink and downlink transmission rates.

[0167] In some embodiments, terms such as "uplink", "uplink", "physical uplink", etc. can be used interchangeably, and terms such as "downlink", "downlink", "physical downlink", etc. can be used interchangeably.

[0168] In some embodiments, due to limited receiving capabilities, the receiving terminal may only be able to receive sidelink services on one or several carriers, and due to limited sending capabilities, the transmitting terminal may only be able to send sidelink services on one or several carriers.

[0169] In some embodiments, higher layer implementations may be relied upon to determine which service is of interest and only receive data on carriers associated with the service of interest.

[0170] In some embodiments, New Radio (NR) SL supports sidelink CA. Optionally, limited terminal capabilities may not be considered, and terminals supporting carrier aggregation are assumed to support transmission and reception on all carriers. Optionally, limited terminal capabilities may be considered.

[0171] In some embodiments, NR SL supports both broadcast and unicast. For unicast services, if the transmitting carrier supported by the transmitting terminal is not completely consistent with the receiving carrier supported by the receiving terminal, data packets may be lost. If the carriers supported by the transmitting terminal and the carriers supported by the receiving terminal do not overlap at all, the transmitting terminal and the receiving terminal cannot perform unicast communication. Therefore, considering the limited terminal capabilities, how to determine the carrier used for carrier aggregation between the transmitting terminal and the receiving terminal is an urgent problem to be solved.

[0172] Based on this, the present disclosure proposes a method for determining a carrier.

[0173] Optionally, in some embodiments, the method of the present disclosure may be applied to a SL CA scenario. For example, in some embodiments, the method of the present disclosure may be applied to a vehicle networking scenario.

[0174] FIG2A is an interactive diagram illustrating a method for determining a carrier according to an embodiment of the present disclosure. As shown in FIG2A , an embodiment of the present disclosure relates to a method for determining a carrier, which is used in a communication system 100. The method includes:

[0175] Step S2101: The second terminal 102 sends second indication information and / or third indication information to the first terminal 101.

[0176] In some embodiments, the first terminal 101 may be a transmitting terminal, and the second terminal 102 may be a receiving terminal.

[0177] In some embodiments, there may be one or more terminals that establish a unicast connection with the first terminal 101, and the second terminal 102 may be one of them. In other words, the second terminal 102 may be any terminal that establishes a unicast connection with the first terminal 101.

[0178] In some embodiments, the resource allocation method of the first terminal 101 can independently select the method of sending resources.

[0179] In some embodiments, the first terminal 101 may be a terminal in any one of an RRC connected state, an RRC idle state, an RRC dormant state, and an out of coverage (OOC) state.

[0180] In some embodiments, the second indication information may be used to indicate a second carrier supported by the second terminal 102 , and the third indication information may be used to indicate a third carrier that the second terminal 102 preferably supports.

[0181] In some embodiments, "carrier," "frequency band," "spectrum," and "frequency" may be used interchangeably.

[0182] In some embodiments, the name of the second indication information is not limited, and it can be, for example, "first information", "first capability information", etc.

[0183] In some embodiments, the name of the third indication information is not limited, and it can be, for example, "second information", "second capability information", etc.

[0184] In some embodiments, the second carrier supported by the second terminal 102 may include a carrier supported for sending and / or supported for receiving by the second terminal 102. Exemplarily, the carrier supported for sending by the second terminal 102 may refer to a carrier that the second terminal 102 can use to send sidelink data, and the carrier supported for receiving by the second terminal 102 may refer to a carrier that the second terminal 102 can use to receive sidelink data.

[0185] In some embodiments, the third carrier that the second terminal 102 prefers to support may include a carrier that the second terminal 102 prefers to support sending and / or receiving. Exemplarily, the third carrier that the second terminal 102 prefers to support may be a carrier recommended by the second terminal 102 for use among the supported third carriers. Exemplarily, the third carrier that the second terminal 102 prefers to support may be a portion of the preferred carriers selected by the second terminal 102 on the supported second carriers. Exemplarily, the carrier that the second terminal 102 prefers to support sending may refer to a carrier that the second terminal 102 may prefer to use for sending sidelink data, and the carrier that the second terminal 102 prefers to support receiving may refer to a carrier that the second terminal 102 may prefer to use for receiving sidelink data. Here, preferred may refer to a carrier that the second terminal 102 desires to use for sending or receiving information. That is, the second terminal 102 may recommend a single carrier that it desires to use to the first terminal 101, or may recommend one or more of multiple carriers that it desires to use to the first terminal 101, so that the first terminal 101 determines carriers that can be aggregated based on the carrier that the second terminal 102 desires to use. The second terminal 102 may inform the network device 103 through the first terminal 101 of the carrier that the second terminal 102 expects to use, so that the network device 103 determines carriers that can be aggregated based on the carrier that the second terminal 102 expects to use.

[0186] In some embodiments, the support described in the present disclosure may refer to support for sending sidelink data, or support for receiving sidelink data, or support for sending and receiving sidelink data.

[0187] In some embodiments, the supporting sending and / or supporting receiving described in the present disclosure may refer to supporting sending and / or supporting receiving sidelink data.

[0188] In some embodiments, the support for sending described in the present disclosure may refer to supporting the sending of sidelink data, and the support for receiving may refer to supporting the receiving of sidelink data.

[0189] In some embodiments, the second terminal 102 may send the second indication information and / or the third indication information to the first terminal 101 via PC5-RRC signaling. Exemplarily, the PC5-RRC signaling may be UECapabilityInformationSidelink signaling, UEAssistanceInformationSidelink signaling, or newly defined PC5-RRC signaling, which is not specifically limited in this disclosure. Exemplarily, the second terminal 102 may send the second indication information and / or the third indication information to the first terminal 101 via other PC5 signaling, such as PC5 MAC CE. This disclosure does not specifically limit this.

[0190] Exemplarily, the second indication information and / or the third indication information may be carried by the same PC5-RRC signaling, or may be carried by different PC5-RRC signaling.

[0191] Exemplarily, the second indication information may include a carrier identifier list, which may include carrier information of carriers supported for transmission and / or carrier information of carriers supported for reception by the second terminal 102. Exemplarily, the one carrier identifier list may include carrier information of carriers supported for transmission by the second terminal 102; Exemplarily, the one carrier identifier list may include carrier information of carriers supported for reception by the second terminal 102; Exemplarily, the one carrier identifier list may include carrier information of carriers supported for transmission and carriers supported for reception by the second terminal 102; Exemplarily, the second indication information may include two carrier identifier lists, one list including carrier information of carriers supported for transmission by the second terminal 102, and the other list including carrier information of carriers supported for reception by the second terminal 102.

[0192] Exemplarily, the third indication information may include a carrier identification list, which may include carrier information of carriers that the second terminal 102 preferably supports for sending and / or carrier information of carriers that the second terminal 102 preferably supports for receiving. Exemplarily, the one carrier identification list may include carrier information of carriers that the second terminal 102 preferably supports for sending; Exemplarily, the one carrier identification list may include carrier information of carriers that the second terminal 102 preferably supports for receiving; Exemplarily, the one carrier identification list may include carrier information of carriers that the second terminal 102 preferably supports for sending and carriers that the second terminal 102 preferably supports for receiving; Exemplarily, the third indication information may include two carrier identification lists, one list including carrier information of carriers that the second terminal 102 preferably supports for sending, and the other list including carrier information of carriers that the second terminal 102 preferably supports for receiving.

[0193] In some embodiments, the second terminal 102 may actively send the second indication information and / or the third indication information to the first terminal 101 .

[0194] Exemplarily, if the second terminal 102 is interested in sending the second indication information and / or the third indication information, it can send the second indication information and / or the third indication information to the first terminal 101. Exemplarily, after establishing a unicast connection with the first terminal 101, the second terminal 102 can send the second indication information and / or the third indication information to the first terminal 101 (the second indication information and / or the third indication information is sent for the first time after the unicast connection is established).

[0195] Exemplarily, when the second indication information changes compared to the previous second indication information (for example, the second carrier changes compared to the previous second carrier), the second terminal 102 sends the second indication information to the first terminal 101. Exemplarily, the previous second indication information may refer to the second indication information last sent to the first terminal 101. Thus, when the second carrier changes, the second terminal 102 can promptly notify the first terminal 101 of the latest second carrier.

[0196] Exemplarily, when the third indication information changes compared to the previous third indication information (for example, the third carrier changes compared to the previous third carrier), the second terminal 102 sends the third indication information to the first terminal 101. Exemplarily, the previous third indication information may refer to the third indication information last sent to the first terminal 101. Thus, when the third carrier changes, the second terminal 102 can promptly notify the first terminal 101 of the latest third carrier.

[0197] In some embodiments, the first terminal 101 may send a request message to the second terminal 102 to request the second indication information and / or the third indication information. After receiving the request message, the second terminal 102 sends the second indication information and / or the third indication information to the first terminal 101.

[0198] For example, the first terminal 101 may send the request information to the second terminal 102 via PC5-RRC signaling. For example, the PC5-RRC signaling may be UECapabilityEnquirySidelink signaling or newly defined PC5-RRC signaling, which is not limited in this disclosure. For example, the first terminal 101 may send the request information to the second terminal 102 via other PC5 signaling, such as PC5 MAC CE. This disclosure does not specifically limit this.

[0199] In some embodiments, the request information may include carrier information of the carrier supported by the first terminal 101, and the second terminal 102 may determine the second indication information and / or the third indication information based on the carrier supported by the first terminal 101 and the carrier supported by the second terminal 102.

[0200] Exemplarily, the request information may include carrier information of a fourth carrier supported by the first terminal 101. Exemplarily, the fourth carrier supported by the first terminal 101 includes a carrier supported by the first terminal 101 for receiving and / or sending. Exemplarily, the carrier supported by the first terminal 101 for sending may refer to a carrier that the first terminal 101 can use to send sidelink data, and exemplary, the carrier supported by the first terminal 101 for receiving may refer to a carrier that the first terminal 101 can use to receive sidelink data.

[0201] Exemplarily, the request information may include carrier information of the fifth carrier that the first terminal 101 preferably supports. Exemplarily, the fifth carrier that the first terminal 101 preferably supports may include a carrier that the first terminal 101 prefers to support sending and / or preferably supports receiving. Exemplarily, the carrier that the first terminal 101 prefers to support may be some of the preferred carriers selected by the first terminal 101 on the supported carriers. Exemplarily, the carrier that the first terminal 101 prefers to support sending may refer to the carrier that the first terminal 101 prefers to use for sending sidelink data. Exemplarily, the carrier that the first terminal 101 prefers to support receiving may refer to the carrier that the first terminal 101 prefers to use for receiving sidelink data.

[0202] Exemplarily, the second terminal 102 may determine the second indication information and / or the third indication information based on one or more of the fourth carrier supported by the first terminal 101, the fifth carrier preferred by the first terminal 101, and the carrier supported by the second terminal 102 for reception.

[0203] Exemplarily, the request information may include a carrier identification list, which may include carrier information of carriers supported for transmission and / or carrier information of carriers supported for reception by the first terminal 101. Exemplarily, the one carrier identification list may include carrier information of carriers supported for transmission by the first terminal 101; Exemplarily, the one carrier identification list may include carrier information of carriers supported for reception by the first terminal 101; Exemplarily, the one carrier identification list may include carrier information of carriers supported for transmission and carriers supported for reception by the first terminal 101; Exemplarily, the request information may include two carrier identification lists, one list including carrier information of carriers supported for transmission by the first terminal 101, and the other list including carrier information of carriers supported for reception by the first terminal 101.

[0204] Optionally, the first terminal 101 may send a request message to the second terminal 102 when the resource allocation mode changes. Exemplarily, when the resource allocation mode of the first terminal 101 is configured or reconfigured from mode 1 to mode 2, the request message is sent to the second terminal 102. Exemplarily, when the resource allocation mode of the first terminal 101 is configured or reconfigured from mode 2 to mode 1, the request message is sent to the second terminal 102.

[0205] Optionally, the first terminal 101 may send the request information to the second terminal 102 after establishing a unicast connection with the second terminal 102. Exemplarily, the first terminal 101 may send the request information to the second terminal 102 after establishing a unicast connection with the second terminal 102 based on implementation.

[0206] In some embodiments, the first terminal 101 may receive one or more of the second indication information and the third indication information sent by the second terminal 102 .

[0207] In some embodiments, "receive", "obtain", "obtain", "get", "transmit", "bidirectional transmission", "send and / or receive" can be interchangeable, and can be interpreted as receiving from other entities, obtaining from protocols, obtaining from higher layers, obtaining by self-processing, autonomous implementation, etc.

[0208] In some embodiments, if the first terminal 101 is in an RRC connected state and the resource allocation method of the first terminal is to autonomously select the method of sending resources, the first terminal 101 can send one or more of the second indication information and the third indication information to the network device 103.

[0209] Step S2102: The first terminal 101 determines a first carrier for carrier aggregation.

[0210] In some embodiments, terms such as "certain", "preset", "preset", "setting", "indicated", "a certain", "arbitrary", "any", "first", etc. can be interchangeable, and "specific A", "preset A", "preset A", "setting A", "indicated A", "a certain A", "any A", "any A", "first A" can be interpreted as A pre-specified in a protocol, etc., or as A obtained through setting, configuration, or indication, etc., or as specific A, a certain A, any A, any A, any A or first A, etc., but not limited to this.

[0211] In some embodiments, the first terminal 101 may determine a first carrier for carrier aggregation based on the second indication information. The first carrier may be used by the first terminal 101 to transmit sidelink data to the second terminal 102. Alternatively, the first terminal 101 may determine the first carrier for carrier aggregation based on carriers supported for reception by the second terminal 102 and carriers supported for transmission by the first terminal 101.

[0212] Exemplarily, if the transmitting terminal supports transmitting carriers A1, A2, A3, and A4, and the receiving terminal supports receiving carriers A2, A3, and A4, the transmitting terminal may determine the first carriers to be A2, A3, and A4. Exemplarily, if the transmitting terminal supports transmitting carriers A1, A2, A3, and A4, and the receiving terminal supports receiving carriers A2, A3, and A4, the transmitting terminal may determine the first carriers to be A2 and A3, or A2 and A4, or A3 and A4. This reduces the number of carriers monitored by the receiving terminal, thereby saving power.

[0213] In some embodiments, the first terminal 101 may determine the first carrier for carrier aggregation based on the third indication information. Alternatively, the first terminal 101 may determine the first carrier for carrier aggregation based on the third carrier that the second terminal 102 preferably supports receiving and the carrier that the first terminal 101 supports sending.

[0214] Exemplarily, the transmitting terminal supports the carriers A1, A2, A3, and A4 for transmission, and the receiving terminal preferentially supports the carriers A2 and A3 for reception. The transmitting terminal may determine that the first carrier is A2 or A3.

[0215] In some embodiments, the first terminal 101 may determine the first carrier for carrier aggregation based on the second indication information and the third indication information. Alternatively, the first terminal 101 may determine the first carrier for carrier aggregation based on the second carrier supported for reception by the second terminal 102, the carrier that the second terminal 102 preferably supports for reception, and the carrier that the first terminal 101 supports for transmission.

[0216] Exemplarily, the transmitting terminal supports the carriers A1, A2, A3, and A4 for transmission, and the receiving terminal supports the carriers A2, A3, and A4 for reception. The receiving terminal preferentially supports the carriers A2 and A3 for reception, and the transmitting terminal may determine the first carriers to be A2, A3, and A4. Exemplarily, the transmitting terminal may determine the first carriers to be A2 and A3.

[0217] In some embodiments, if the first terminal 101 does not support sending sidelink data on a carrier supported by the second terminal 102 for reception, illustratively, the second terminal 102 supports receiving sidelink data on multiple carriers, where the multiple carriers include legacy carriers supported for transmission and / or reception by R16 / 17 terminals, as well as other carriers. The first terminal 101 only supports sending sidelink data on legacy carriers supported by R16 / 17 terminals, and does not support sending sidelink data on other carriers supported for reception by the second terminal 102. The first terminal 101 may release the unicast connection with the second terminal 102, or may use a single carrier to send sidelink data to the second terminal 102. Exemplarily, the unicast connection is a PC5-RRC connection.

[0218] In some embodiments, if the first terminal 101 does not support sending sidelink data on a carrier that the second terminal 102 preferably supports receiving, illustratively, the second terminal 102 supports receiving sidelink data on multiple preferred carriers, where the multiple preferred carriers include legacy carriers that R16 / 17 terminals support sending and / or receiving, and also include other preferred carriers. The first terminal 101 only supports sending sidelink data on legacy carriers supported by R16 / 17 terminals, and does not support sending sidelink data on other preferred carriers that the second terminal 102 supports receiving. The first terminal 101 may release the unicast connection between the first terminal 101 and the second terminal 102, or may use a single carrier to send sidelink data to the second terminal 102. Exemplarily, the unicast connection is a PC5-RRC connection.

[0219] Exemplarily, the single carrier is a carrier supported by R16 / 17 terminals for sending and / or receiving, also referred to as a legacy carrier.

[0220] Step S2103 : The first terminal 101 sends first indication information to the second terminal 102 .

[0221] In some embodiments, the first indication information may be used to indicate the first carrier.

[0222] In some embodiments, the name of the first indication information is not limited, and it can be, for example, "third information", "notification information", etc.

[0223] In some embodiments, the first terminal 101 may send the first indication information to the second terminal 102 via PC5-RRC signaling. For example, the PC5-RRC signaling may be RRCReconfigurationSidelink signaling or a newly defined PC5-RRC signaling, which is not specifically limited in this disclosure.

[0224] In some embodiments, the first terminal 101 may send the first indication information to the second terminal 102 through other PC5 signaling, such as a PC5 media access control element (MAC CE), which is not specifically limited in this disclosure.

[0225] In some embodiments, the second terminal 102 may receive the first indication information sent by the first terminal 101 .

[0226] In some embodiments, the second terminal 102 may determine whether the first indication information is acceptable. If not, the second terminal 102 may send fourth indication information to the first terminal 101, and the first terminal 101 receives the fourth indication information sent by the second terminal 102. The fourth indication information may be used to instruct the second terminal 102 to reject the first indication information.

[0227] For example, if the first carrier indicated by the first indication information is carrier a and carrier b, and the carriers supported for reception by the second terminal 102 are carrier a and carrier b, but the second terminal 102 does not support simultaneous data reception on carrier a and carrier b due to limited capabilities, then the second terminal 102 may reject the first indication information. For another example, if the first carrier indicated by the first indication information is not the carrier preferred by the second terminal 102, then the second terminal 102 may reject the first indication information.

[0228] Exemplarily, the fourth indication information may be carried by PC5-RRC signaling. Exemplarily, the PC5-RRC signaling may be RRCReconfigurationCompleteSidelink signaling or a newly defined PC5-RRC signaling, which is not specifically limited in the present disclosure.

[0229] Exemplarily, the second terminal 102 may send the fourth indication information to the first terminal 101 through other PC5 signaling, such as PC5 MAC CE, which is not specifically limited in the present disclosure.

[0230] In some embodiments, after receiving the fourth indication information, the first terminal 101 may re-determine the first carrier according to one or more of the second indication information, the third indication information, and the fourth indication information.

[0231] In some embodiments, the first terminal 101 may re-determine the first carrier based on one or more of the second indication information, the third indication information, the fourth indication information, and / or the carriers supported by the first terminal 101.

[0232] In some embodiments, the first terminal 101 can re-determine the first carrier based on the carrier supported by the second terminal 102 for reception, the carrier preferred by the second terminal 102 for reception, one or more of the fourth indication information, and / or the carrier supported by the first terminal 101 for transmission, and notify the second terminal 102 of the re-determined first carrier. Exemplarily, the first carrier re-determined by the first terminal 101 can be notified to the second terminal 102 through the first indication information.

[0233] In some embodiments, the first terminal 101 may send one or more of the second indication information, the third indication information, and the fourth indication information to the network device 103 .

[0234] In some embodiments, if the first terminal 101 is in an RRC connected state, the first terminal 101 may send one or more of the second indication information, the third indication information, and the fourth indication information to the network device 103 .

[0235] In some embodiments, the second terminal 102 receives the first indication information, and the first terminal 101 may send sidelink data to the second terminal 102 via the first carrier.

[0236] In some embodiments, the second terminal 102 may receive sidelink data sent by the first terminal 101 via the first carrier.

[0237] The scheme for determining the first carrier by the transmitting terminal involved in the embodiment of the present disclosure is applicable to the terminal operating in mode 2. Exemplarily, the transmitting terminal may be in an RRC connected state, an RRC IDLE (idle) state, an RRC INACTIVE (sleeping) state, or an OOC state.

[0238] The scheme for determining the first carrier by the transmitting terminal involved in the embodiment of the present disclosure is applicable to a terminal operating in mode 2. Exemplarily, the transmitting terminal is in the RRCIDLE state, the RRCINACTIVE state, or the OOC state.

[0239] The scheme for determining the first carrier by the transmitting terminal involved in the embodiment of the present disclosure is applicable to a terminal operating in mode 1. Exemplarily, the transmitting terminal may be in an RRC connected state.

[0240] The method for determining a carrier involved in the embodiments of the present disclosure is determined based on the granularity of the sidelink data transmission direction. Exemplarily, for a source address and destination address pair (A, B), terminal A is the transmitting terminal, and terminal A determines the first carrier for carrier aggregation. The first carrier is used for terminal A to send unicast data to terminal B. Exemplarily, for a source address and destination address pair (B, A), terminal B is the transmitting terminal, and terminal B determines the first carrier. The first carrier is used for terminal B to send unicast data to terminal A.

[0241] In some embodiments, a source address may be replaced with a source layer 2 address, a target address may be replaced with a target layer 2 address, and a source address target address pair may be replaced with a source layer 2 address target layer 2 address pair.

[0242] The method for determining a carrier involved in the embodiments of the present disclosure may include at least one of steps S2101 to S2103. For example, step S2101 may be implemented as an independent embodiment, step S2102 may be implemented as an independent embodiment, step S2103 may be implemented as an independent embodiment, step S2101 and step S2102 may be implemented as independent embodiments, and step S2102 and step S2103 may be implemented as independent embodiments, but the present invention is not limited thereto.

[0243] In some embodiments, step S2101 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0244] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, the optional methods or optional examples can be arbitrarily combined, and can be arbitrarily combined with any steps of other embodiments or other examples.

[0245] FIG2B is an interactive diagram illustrating a method for determining a carrier according to an embodiment of the present disclosure. As shown in FIG2B , an embodiment of the present disclosure relates to a method for determining a carrier, which is used in a communication system 100. The method includes:

[0246] Step S2201: The second terminal 102 sends second indication information and / or third indication information to the first terminal 101.

[0247] The optional implementation of step S2201 can refer to the optional implementation of step S2101 in Figure 2A and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0248] Step S2202: The first terminal 101 sends second indication information and / or third indication information to the network device 103.

[0249] In some embodiments, if the first terminal 101 is in an RRC connected state and the resource allocation mode of the first terminal 101 is a mode of autonomously selecting sending resources, the first terminal 101 may send second indication information and / or third indication information to the network device 103. That is, if the first terminal 101 is in an RRC connected state and the resource allocation mode of the first terminal 101 is a mode of autonomously selecting sending resources, the first terminal 101 may send the second indication information and / or third indication information received from the second terminal 102 to the network device 103.

[0250] In some embodiments, when the second indication information changes compared to the previous second indication information (for example, the carrier supported by the second terminal 102 changes compared to the previously supported carrier), the first terminal 101 may send the second indication information to the network device 103. Exemplarily, the previous second indication information may refer to the second indication information last sent to the network device 103.

[0251] In addition, the first terminal 101 can actively obtain the second indication information to determine whether the second indication information has changed. For example, the first terminal 101 can periodically obtain the second indication information to compare the second indication information currently obtained with the second indication information obtained last time. Alternatively, the first terminal 101 can obtain the second indication information and inform the network device 103 only when the second indication information changes. If the first terminal 101 does not obtain new second indication information, the first terminal 101 considers that the second indication information has not changed. Exemplarily, when the carrier supported by the second terminal 102 in unicast communication with the first terminal 101 changes, the second terminal 102 sends the second indication information to the first terminal 101 to inform it of the currently supported carrier.

[0252] In addition, when the second indication information changes, the first terminal 101 notifies the network device 103 of the changed second indication information. Optionally, the second indication information may send the changed new second indication information to the network device 103, or may only send the change amount of the second indication information to the network device 103. For example, when the carrier supported by the second terminal 102 in unicast communication with the first terminal changes from the previous carriers a and b to carriers a and c, the first terminal 101 may send a second indication information to the network device 103 to indicate the carriers a and c supported by the second terminal 102, or may send the second indication information to the network device 103 to indicate that the second terminal 102 no longer supports carrier b and supports carrier c.

[0253] In some embodiments, when the third indication information changes compared to the previous third indication information (for example, the carrier preferentially supported by the second terminal 102 changes compared to the previously preferred carrier preferentially supported), the first terminal 101 may send the third indication information to the network device 103. Exemplarily, the previous third indication information may refer to the third indication information last sent to the network device 103.

[0254] In addition, the first terminal 101 can actively obtain the third indication information to determine whether the third indication information has changed. For example, the first terminal 101 can periodically obtain the third indication information to compare the third indication information currently obtained with the third indication information obtained last time. Alternatively, the first terminal 101 can obtain the third indication information and inform the network device 103 only when the third indication information changes. If the first terminal 101 does not obtain new third indication information, the first terminal 101 considers that the third indication information has not changed. In the case of the third indication information, when the carrier preferred by the second terminal 102 changes, the second terminal 102 sends the third indication information to the first terminal 101 to inform it of the currently preferred supported carrier. Exemplarily, the first terminal 101 can send one or more of the second indication information and the third indication information to the network device 103 through Uu RRC signaling. Exemplarily, the Uu RRC signaling may be sidelink UE Information (SUI) or UE assistance information (UAI) or other newly defined Uu RRC signaling, which is not specifically limited in the present disclosure.

[0255] In some embodiments, the network device 103 may receive the second indication information and / or the third indication information sent by the first terminal 101 .

[0256] In step S2203 , the network device 103 determines a first carrier for carrier aggregation.

[0257] In some embodiments, the network device 103 may determine the first carrier according to one or more of the second indication information and the third indication information.

[0258] In some embodiments, the network device 103 may determine the first carrier based on one or more of the second carrier and the third carrier and the carrier supported by the first terminal 101 .

[0259] Optionally, the network device 103 may determine the first carrier based on one or more of the carriers supported for reception by the second terminal 102, the carriers preferred to be supported for reception by the second terminal 102, and / or the carriers supported for transmission by the first terminal 101.

[0260] In some embodiments, if the first terminal 101 does not support sending sidelink data on a carrier supported by the second terminal 102 for reception, illustratively, the second terminal 102 supports receiving sidelink data on multiple carriers, where the multiple carriers include legacy carriers supported for transmission and / or reception by R16 / 17 terminals, as well as other carriers. The first terminal 101 only supports sending sidelink data on legacy carriers supported by R16 / 17 terminals, and does not support sending sidelink data on other carriers supported for reception by the second terminal 102. The first terminal 101 may release the unicast connection with the second terminal 102, or may use a single carrier to send sidelink data to the second terminal 102. Exemplarily, the unicast connection is a PC5-RRC connection.

[0261] In some embodiments, if the first terminal 101 does not support sending sidelink data on a carrier that the second terminal 102 preferably supports receiving, illustratively, the second terminal 102 supports receiving sidelink data on multiple preferred carriers, where the multiple preferred carriers include legacy carriers that R16 / 17 terminals support sending and / or receiving, and also include other preferred carriers. The first terminal 101 only supports sending sidelink data on legacy carriers supported by R16 / 17 terminals, and does not support sending sidelink data on other preferred carriers that the second terminal 102 supports receiving. The first terminal 101 may release the unicast connection between the first terminal 101 and the second terminal 102, or may use a single carrier to send sidelink data to the second terminal 102. Exemplarily, the unicast connection is a PC5-RRC connection.

[0262] Exemplarily, the single carrier is a carrier supported by R16 / 17 terminals for sending and / or receiving, also referred to as a legacy carrier.

[0263] Step S2204 , the network device 103 sends fifth indication information to the first terminal 101 .

[0264] In some embodiments, the first terminal 101 may receive fifth indication information sent by the network device 103 and determine a first carrier for carrier aggregation based on the fifth indication information. The fifth indication information may be used to indicate the first carrier determined by the network device 103, and the first carrier may be used by the first terminal 101 to send sidelink data to the second terminal 102.

[0265] Illustratively, the network device 103 may send the fifth indication information to the first terminal 101 via Uu RRC signaling. Illustratively, the Uu RRC signaling may be RRCReconfiguration signaling or newly defined Uu RRC signaling, which is not specifically limited in the present disclosure.

[0266] Step S2205 : The first terminal 101 sends first indication information to the second terminal 102 .

[0267] In some embodiments, the first indication information may be used to indicate the first carrier.

[0268] In some embodiments, after receiving the fifth indication information, the first terminal 101 sends the first indication information to the second terminal 102 .

[0269] In some embodiments, after receiving the fifth indication information, the first terminal 101 may determine the first carrier according to the fifth indication information and send the first indication information to the second terminal 102 .

[0270] In some embodiments, the second terminal 102 may receive the first indication information sent by the first terminal 101 .

[0271] In some embodiments, the second terminal 102 may determine whether the first indication information is acceptable. If not, the second terminal 102 may send fourth indication information to the first terminal 101, and the first terminal 101 receives the fourth indication information sent by the second terminal 102. The fourth indication information may be used to instruct the second terminal 102 to reject the first indication information.

[0272] For example, if the first carrier indicated by the first indication information is carrier a and carrier b, and the carriers supported for reception by the second terminal 102 are carrier a and carrier b, but the second terminal 102 does not support simultaneous data reception on carrier a and carrier b due to limited capabilities, then the second terminal 102 may reject the first indication information. For another example, if the first carrier indicated by the first indication information is not the carrier preferred by the second terminal 102, then the second terminal 102 may reject the first indication information.

[0273] Exemplarily, the fourth indication information may be carried by PC5-RRC signaling. Exemplarily, the PC5-RRC signaling may be RRCReconfigurationCompleteSidelink signaling or a newly defined PC5-RRC signaling, which is not specifically limited in the present disclosure.

[0274] Exemplarily, the second terminal 102 may send the fourth indication information to the first terminal 101 via other PC5 signaling, such as PC5 MAC CE, which is not specifically limited in this disclosure. In some embodiments, the first terminal 101 may send the fourth indication information to the network device 103, and the network device 103 receives the fourth indication information and re-determines the first carrier based on one or more of the second indication information, the third indication information, and the fourth indication information. Exemplarily, the first terminal 101 sends the fourth indication information to the network device 103 via Uu RRC signaling. Exemplarily, the Uu RRC signaling may be SUI, UAI, or other newly defined Uu RRC signaling, which is not specifically limited in this disclosure.

[0275] Exemplarily, the first terminal 101 may send one or more of the second indication information, the third indication information, and the fourth indication information received from the second terminal 102 to the network device 103 via Uu RRC signaling. Exemplarily, the Uu RRC signaling may be SUI or UAI or other newly defined Uu RRC signaling, which is not specifically limited in this disclosure.

[0276] In some embodiments, the network device 103 may re-determine the first carrier based on one or more of the second indication information, the third indication information, the fourth indication information, and / or the carriers supported by the first terminal 101.

[0277] In some embodiments, the network device 103 may re-determine the first carrier based on one or more of the carriers supported for reception by the second terminal 102, the carriers preferred for reception by the second terminal 102, the fourth indication information, and / or the carriers supported for transmission by the first terminal 101, and notify the first terminal 101 of the re-determined first carrier, which the first terminal 101 then notifies the second terminal 102. Exemplarily, the first carrier re-determined by the network device 103 may be notified to the first terminal 101 through the fifth indication information. Exemplarily, the first terminal 101 receives the fifth indication information sent by the network device 103 and then notifies the second terminal 102. Exemplarily, the first terminal 101 may notify the second terminal 102 through the first indication information.

[0278] In some embodiments, the second terminal 102 receives the first indication information, and the first terminal 101 may send sidelink data to the second terminal 102 via the first carrier.

[0279] In some embodiments, the second terminal 102 may receive sidelink data sent by the first terminal 101 via the first carrier.

[0280] The solution for determining the first carrier by a network device involved in the embodiment of the present disclosure may be applicable to a terminal that is in an RRC connected state and operates in mode 2.

[0281] The method for determining a carrier involved in the embodiments of the present disclosure is determined according to the granularity of the sidelink data transmission direction. Exemplarily, for a source address and target address pair (A, B), A is the transmitting terminal, and the network device determines the first carrier for carrier aggregation and notifies terminal A. The first carrier is used by terminal A to send unicast data to terminal B. Exemplarily, for a source address and target address pair (B, A), B is the transmitting terminal, and the network device determines the first carrier and notifies terminal B. The first carrier is used by terminal B to send unicast data to terminal A.

[0282] In some embodiments, a source address may be replaced with a source layer 2 address, a target address may be replaced with a target layer 2 address, and a source address target address pair may be replaced with a source layer 2 address target layer 2 address pair.

[0283] The method for determining a carrier involved in the embodiments of the present disclosure may include at least one of steps S2201 to S2105. For example, step S2101 may be implemented as an independent embodiment, step S2102 may be implemented as an independent embodiment, step S2103 may be implemented as an independent embodiment, step S2104 may be implemented as an independent embodiment, step S2105 may be implemented as an independent embodiment, steps S2101 and S2102 may be implemented as independent embodiments, steps S2103 and S2104 may be implemented as independent embodiments, and steps S2103, S2104, and 205 may be implemented as independent embodiments, but are not limited thereto.

[0284] In some embodiments, step S2101 and step S2102 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0285] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, the optional methods or optional examples can be arbitrarily combined, and can be arbitrarily combined with any steps of other embodiments or other examples.

[0286] FIG3A is a flow chart of a method for determining a carrier according to an embodiment of the present disclosure. As shown in FIG3A , the embodiment of the present disclosure relates to a method for determining a carrier, which is used by a first terminal 101. The method includes:

[0287] Step S3101: Obtain second indication information and / or third indication information.

[0288] The optional implementation of step S3101 can refer to the optional implementation of step S2101 in Figure 2A and other related parts in the embodiment involved in Figure 2A, which will not be repeated here.

[0289] In some embodiments, the first terminal 101 receives the second indication information and / or the third indication information sent by the second terminal 102, but is not limited thereto and may also receive the second indication information and / or the third indication information sent by other entities.

[0290] In some embodiments, the first terminal 101 obtains the second indication information and / or the third indication information specified by the protocol.

[0291] In some embodiments, the first terminal 101 obtains the second indication information and / or the third indication information from an upper layer(s).

[0292] Step S3102: Determine a first carrier for carrier aggregation.

[0293] The optional implementation of step S3102 can refer to the optional implementation of step S2102 in Figure 2A and other related parts in the embodiment involved in Figure 2A, which will not be repeated here.

[0294] Step 3103: Send the first indication information.

[0295] The optional implementation of step S3103 can refer to the optional implementation of step S2102 in Figure 2A and other related parts in the embodiment involved in Figure 2A, which will not be repeated here.

[0296] In some embodiments, the first terminal 101 may send the first indication information to the second terminal 102 , but is not limited thereto and may also send the first indication information to other entities.

[0297] In some embodiments, step S3101 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0298] The method for determining a carrier involved in the embodiments of the present disclosure may include at least one of steps S3101 to S3103. For example, step S3101 may be implemented as an independent embodiment, step S3102 may be implemented as an independent embodiment, step S3102 may be implemented as an independent embodiment, step S3101 and step S3102 may be implemented as independent embodiments, and step S3102 and step S3103 may be implemented as independent embodiments, but the present invention is not limited thereto.

[0299] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, and the optional methods or optional examples can be arbitrarily combined.

[0300] FIG3B is a flow chart of a method for determining a carrier according to an embodiment of the present disclosure. As shown in FIG3B , the embodiment of the present disclosure relates to a method for determining a carrier, which is used by a first terminal 101 and includes:

[0301] Step S3201: Receive second indication information and / or third indication information sent by a second terminal.

[0302] Optional implementations of step S3201 can be found in step S2101 of FIG. 2A , optional implementations of step S3101 of FIG. 3A , and other related parts in the embodiments involved in FIG. 2 and FIG. 3A , which will not be described in detail here.

[0303] Step S3202: Determine the first carrier according to the second indication information and / or the third indication information.

[0304] Optional implementations of step S3201 can be found in step S2101 of FIG. 2A , optional implementations of step S3101 of FIG. 3A , and other related parts in the embodiments involved in FIG. 2 and FIG. 3A , which will not be described in detail here.

[0305] Step S3203: Send first indication information to the second terminal.

[0306] Optional implementations of step S3203 may refer to step S2103 in FIG. 2A , optional implementations of step S3103 in FIG. 3A , and other related parts in the embodiments involved in FIG. 2A and FIG. 3A , which will not be described in detail here.

[0307] Step S3204: Send sidelink data to the second terminal via the first carrier.

[0308] The optional implementation of step S3204 can refer to the optional implementation of step S2103 in Figure 2A, step S3103 in Figure 3A, and other related parts in the embodiments involved in Figures 2A and 3A, which will not be repeated here.

[0309] The method for determining a carrier involved in the embodiments of the present disclosure may include at least one of steps S3201 to S3204. For example, step S3201 may be implemented as an independent embodiment, step S3202 may be implemented as an independent embodiment, step S3203 may be implemented as an independent embodiment, step S3203 may be implemented as an independent embodiment, step S3201, step S3202, and step S3203 may be implemented as independent embodiments, and step S3202, step S3203, and step S3204 may be implemented as independent embodiments, but the present invention is not limited thereto.

[0310] In some embodiments, step S3201 and step S3204 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0311] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, and the optional methods or optional examples can be arbitrarily combined.

[0312] FIG3C is a flow chart of a method for determining a carrier according to an embodiment of the present disclosure. As shown in FIG3C , the embodiment of the present disclosure relates to a method for determining a carrier, which is used by a first terminal 101. The method includes:

[0313] Step S3301: Receive second indication information and / or third indication information sent by a second terminal.

[0314] The optional implementation of step S3301 can be found in step S2101 of FIG. 2A , the optional implementation of step S3101 of FIG. 3A , and other related parts in the embodiments involved in FIG. 2A , FIG. 3A , and FIG. 3B , which will not be repeated here.

[0315] Step S3302: Determine the first carrier according to the second indication information and / or the third indication information.

[0316] The optional implementation of step S3302 can be found in step S2102 of Figure 2A, step S3102 of Figure 3A, the optional implementation of step S3102 of Figure 3B, and other related parts in the embodiments involved in Figures 2A, 3A, and 3B, which will not be repeated here.

[0317] Step S3303: Send first indication information to the second terminal.

[0318] The optional implementation of step S3303 can be found in step S2103 of FIG. 2A , the optional implementation of step S3103 of FIG. 3A , and other related parts in the embodiments involved in FIG. 2A , FIG. 3A , and FIG. 3B , which will not be described in detail here.

[0319] Step 3304: Receive fourth indication information sent by the second terminal.

[0320] The optional implementation of step S3304 can be found in step S2103 of FIG. 2A , the optional implementation of step S3103 of FIG. 3A , and other related parts in the embodiments involved in FIG. 2A , FIG. 3A , and FIG. 3B , which will not be repeated here.

[0321] Step 3305: Re-determine the first carrier according to one or more of the second indication information, the third indication information, and the fourth indication information.

[0322] The optional implementation of step S3305 can be found in step S2103 of FIG. 2A , the optional implementation of step S3103 of FIG. 3A , and other related parts in the embodiments involved in FIG. 2A , FIG. 3A , and FIG. 3B , which will not be described in detail here.

[0323] The method for determining a carrier involved in the embodiments of the present disclosure may include at least one of steps S3301 to S3305. For example, step S3301 may be implemented as an independent embodiment, step S3302 may be implemented as an independent embodiment, step S3303 may be implemented as an independent embodiment, step S3303 may be implemented as an independent embodiment, steps S3301 and S3302 may be implemented as independent embodiments, and steps S3304 and S3305 may be implemented as independent embodiments, but are not limited thereto.

[0324] In some embodiments, step S3301 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0325] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, and the optional methods or optional examples can be arbitrarily combined.

[0326] FIG3D is a flow chart of a method for determining a carrier according to an embodiment of the present disclosure. As shown in FIG3D , the embodiment of the present disclosure relates to a method for determining a carrier, which is used by a first terminal 101 and includes:

[0327] Step S3401: Obtain second indication information and / or third indication information.

[0328] The optional implementation of step S3401 can refer to the optional implementation of step S2101 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0329] In some embodiments, the first terminal 101 receives the second indication information and / or the third indication information sent by the second terminal 102, but is not limited thereto and may also receive the second indication information and / or the third indication information sent by other entities.

[0330] In some embodiments, the first terminal 101 obtains the second indication information and / or the third indication information specified by the protocol.

[0331] In some embodiments, the first terminal 101 obtains the second indication information and / or the third indication information from a higher layer.

[0332] Step S3402: Send the second indication information and / or the third indication information.

[0333] The optional implementation of step S3402 can refer to the optional implementation of step S2102 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0334] In some embodiments, the first terminal 101 may send the second indication information and / or the third indication information to the network device 103, but is not limited thereto, and may also send the second indication information and / or the third indication information to other entities.

[0335] In some embodiments, the first terminal 101 is in an RRC connected state and the resource allocation method of the first terminal 101 is a method of autonomously selecting sending resources.

[0336] Step S3403: Obtain fifth indication information.

[0337] The optional implementation of step S3403 can refer to the optional implementation of step S2104 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0338] In some embodiments, the first terminal 101 receives the fifth indication information sent by the network device 103, but is not limited thereto. The first terminal 101 may also receive the fifth indication information sent by other entities.

[0339] In some embodiments, the first terminal 101 obtains fifth indication information specified by the protocol.

[0340] In some embodiments, the first terminal 101 obtains the fifth indication information from a higher layer.

[0341] Step S3404: Send first indication information.

[0342] The optional implementation of step S3404 can refer to the optional implementation of step S2105 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0343] In some embodiments, the first terminal 101 may send the first indication information to the second terminal 102, but is not limited thereto, and may also send the first indication information to other entities.

[0344] The method for determining a carrier involved in the embodiments of the present disclosure may include at least one of steps S3401 to S3404. For example, step S3401 may be implemented as an independent embodiment, step S3402 may be implemented as an independent embodiment, step S3403 may be implemented as an independent embodiment, step S3404 may be implemented as an independent embodiment, step S3401 and step S3402 may be implemented as independent embodiments, and step S3401, step S3402, and step S3403 may be implemented as independent embodiments, but are not limited thereto.

[0345] In some embodiments, step S3401 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0346] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, and the optional methods or optional examples can be arbitrarily combined.

[0347] FIG3E is a flow chart of a method for determining a carrier according to an embodiment of the present disclosure. As shown in FIG3E , the embodiment of the present disclosure relates to a method for determining a carrier, which is used by a first terminal 101 and includes:

[0348] Step S3501: Receive second indication information and / or third indication information sent by a second terminal.

[0349] The optional implementation of step S3501 can refer to the optional implementation of step S2101 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0350] Step S3502: Send the second indication information and / or the third indication information to the network device.

[0351] The optional implementation of step S3502 can refer to the optional implementation of step S2102 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0352] In some embodiments, the first terminal 101 is in an RRC connected state and the resource allocation method of the first terminal 101 is a method of autonomously selecting sending resources.

[0353] Step S3503: Receive fifth indication information sent by the network device.

[0354] The optional implementation of step S3503 can refer to the optional implementation of step S2104 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0355] Step S3504: Determine the first carrier according to the fifth indication information.

[0356] The optional implementation of step S3504 can refer to the optional implementation of step S2104 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0357] Step S3505: Send first indication information to the second terminal.

[0358] The optional implementation of step S3505 can refer to the optional implementation of step S2105 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0359] Step S3506: Send sidelink data to the second terminal via the first carrier.

[0360] The optional implementation of step S3506 can refer to the optional implementation of step S2105 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0361] The method for determining a carrier involved in the embodiments of the present disclosure may include at least one of steps S3501 to S3506. For example, step S3501 may be implemented as an independent embodiment, step S3502 may be implemented as an independent embodiment, step S3503 may be implemented as an independent embodiment, step S3504 may be implemented as an independent embodiment, step S3505 may be implemented as an independent embodiment, step S3506 may be implemented as an independent embodiment, steps S3503, S3504, and S3505 may be implemented as independent embodiments, and steps S3503, S3504, S3505, and S3506 may be implemented as independent embodiments, but are not limited thereto.

[0362] In some embodiments, step S3501, step S3502, step S3506, etc. are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0363] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, and the optional methods or optional examples can be arbitrarily combined.

[0364] FIG3F is a flow chart of a method for determining a carrier according to an embodiment of the present disclosure. As shown in FIG3F , the embodiment of the present disclosure relates to a method for determining a carrier, which is used by a first terminal 101 and includes:

[0365] Step S3601: Receive second indication information and / or third indication information sent by a second terminal.

[0366] The optional implementation of step S3601 can refer to the optional implementation of step S2101 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0367] Step S3602: Send the second indication information and / or the third indication information to the network device.

[0368] The optional implementation of step S3602 can refer to the optional implementation of step S2102 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0369] In some embodiments, the first terminal 101 is in an RRC connected state and the resource allocation method of the first terminal 101 is a method of autonomously selecting sending resources.

[0370] Step S3603: Receive fifth indication information sent by the network device.

[0371] The optional implementation of step S3603 can refer to the optional implementation of step S2104 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0372] Step S3604: Determine the first carrier according to the fifth indication information.

[0373] The optional implementation of step S3604 can refer to the optional implementation of step S2104 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0374] Step S3605: Send first indication information to the second terminal.

[0375] The optional implementation of step S3605 can refer to the optional implementation of step S2105 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0376] Step S3606: Receive fourth indication information sent by the second terminal.

[0377] The optional implementation of step S3606 can refer to the optional implementation of step S2105 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0378] Step S3607: Send fourth indication information to the network device.

[0379] The optional implementation of step S3607 can refer to the optional implementation of step S2105 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0380] The method for determining a carrier involved in the embodiments of the present disclosure may include at least one of steps S3601 to S3607. For example, step S3601 may be implemented as an independent embodiment, step S3602 may be implemented as an independent embodiment, step S3603 may be implemented as an independent embodiment, step S3604 may be implemented as an independent embodiment, step S3605 may be implemented as an independent embodiment, step S3606 may be implemented as an independent embodiment, step S3607 may be implemented as an independent embodiment, steps S3503, S3504, S3505, and S3506 may be implemented as independent embodiments, and steps S3505, S3506, and S3507 may be implemented as independent embodiments, but are not limited thereto.

[0381] In some embodiments, step S3601, step S3602, and step S3607 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0382] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, and the optional methods or optional examples can be arbitrarily combined.

[0383] FIG3G is a flow chart of a method for determining a carrier according to an embodiment of the present disclosure. As shown in FIG3G , the embodiment of the present disclosure relates to a method for determining a carrier, which is used by a first terminal 101. The method includes:

[0384] Step S3701: Determine a first carrier for carrier aggregation.

[0385] In some embodiments, the second terminal 102 sends the second indication information and / or the third indication information to the first terminal 101.

[0386] In some embodiments, the first terminal 101 may be a transmitting terminal, and the second terminal 102 may be a receiving terminal.

[0387] In some embodiments, there may be one or more terminals that establish a unicast connection with the first terminal 101, and the second terminal 102 may be one of them. In other words, the second terminal 102 may be any terminal that establishes a unicast connection with the first terminal 101.

[0388] In some embodiments, the resource allocation method of the first terminal 101 can independently select the method of sending resources.

[0389] In some embodiments, the first terminal 101 may be a terminal in any one of an RRC connected state, an RRC idle state, an RRC dormant state, and an out of coverage (OOC) state.

[0390] In some embodiments, the second indication information may be used to indicate a second carrier supported by the second terminal 102 , and the third indication information may be used to indicate a third carrier that the second terminal 102 preferably supports.

[0391] In some embodiments, "carrier," "frequency band," "spectrum," and "frequency" may be used interchangeably.

[0392] In some embodiments, the second carrier supported by the second terminal 102 may include a carrier supported for sending and / or supported for receiving by the second terminal 102. Exemplarily, the carrier supported for sending by the second terminal 102 may refer to a carrier that the second terminal 102 can use to send sidelink data, and the carrier supported for receiving by the second terminal 102 may refer to a carrier that the second terminal 102 can use to receive sidelink data.

[0393] In some embodiments, the third carrier that the second terminal 102 prefers to support may include a carrier that the second terminal 102 prefers to support sending and / or preferably supports receiving. Exemplarily, the third carrier that the second terminal 102 prefers to support may be a portion of the preferred carriers selected by the second terminal 102 on the supported second carrier. Exemplarily, the carrier that the second terminal 102 prefers to support sending may refer to a carrier that the second terminal 102 may prefer to use for sending sidelink data, and the carrier that the second terminal 102 prefers to support receiving may refer to a carrier that the second terminal 102 may prefer to use for receiving sidelink data. Here, preferred may refer to a carrier that the second terminal 102 expects to use for sending or receiving information. That is, the second terminal 102 may recommend its desired single carrier to the first terminal 101, or may recommend one or more of its desired multiple carriers to the first terminal 101, so that the first terminal 101 determines the carriers that can be aggregated based on the carriers that the second terminal 102 expects to use. The second terminal 102 may inform the network device 103 through the first terminal 101 of the carrier that the second terminal 102 expects to use, so that the network device 103 determines carriers that can be aggregated based on the carrier that the second terminal 102 expects to use.

[0394] In some embodiments, the support described in the present disclosure may refer to support for sending sidelink data, or support for receiving sidelink data, or support for sending and receiving sidelink data.

[0395] In some embodiments, the supporting sending and / or supporting receiving described in the present disclosure may refer to supporting sending and / or supporting receiving sidelink data.

[0396] In some embodiments, the support for sending described in the present disclosure may refer to supporting the sending of sidelink data, and the support for receiving may refer to supporting the receiving of sidelink data.

[0397] In some embodiments, the second terminal 102 may send the second indication information and / or the third indication information to the first terminal 101 via PC5-RRC signaling. Exemplarily, the PC5-RRC signaling may be UECapabilityInformationSidelink signaling or UEAssistanceInformationSidelink or a newly defined PC5-RRC signaling, which is not specifically limited in this disclosure. Exemplarily, the second terminal 102 may send the second indication information and / or the third indication information to the first terminal 101 via other PC5 signaling, such as PC5 MAC CE. This disclosure does not specifically limit this. Exemplarily, the second indication information and / or the third indication information may be carried by the same PC5-RRC signaling or by different PC5-RRC signaling.

[0398] Exemplarily, the second indication information may include a carrier identifier list, which may include carrier information of carriers supported for transmission and / or carrier information of carriers supported for reception by the second terminal 102. Exemplarily, the one carrier identifier list may include carrier information of carriers supported for transmission by the second terminal 102; Exemplarily, the one carrier identifier list may include carrier information of carriers supported for reception by the second terminal 102; Exemplarily, the one carrier identifier list may include carrier information of carriers supported for transmission and carriers supported for reception by the second terminal 102; Exemplarily, the second indication information may include two carrier identifier lists, one list including carrier information of carriers supported for transmission by the second terminal 102, and the other list including carrier information of carriers supported for reception by the second terminal 102.

[0399] Exemplarily, the third indication information may include a carrier identification list, which may include carrier information of carriers that the second terminal 102 preferably supports for sending and / or carrier information of carriers that the second terminal 102 preferably supports for receiving. Exemplarily, the one carrier identification list may include carrier information of carriers that the second terminal 102 preferably supports for sending; Exemplarily, the one carrier identification list may include carrier information of carriers that the second terminal 102 preferably supports for receiving; Exemplarily, the one carrier identification list may include carrier information of carriers that the second terminal 102 preferably supports for sending and carriers that the second terminal 102 preferably supports for receiving; Exemplarily, the third indication information may include two carrier identification lists, one list including carrier information of carriers that the second terminal 102 preferably supports for sending, and the other list including carrier information of carriers that the second terminal 102 preferably supports for receiving.

[0400] In some embodiments, the second terminal 102 may actively send the second indication information and / or the third indication information to the first terminal 101 .

[0401] Exemplarily, if the second terminal 102 is interested in sending the second indication information and / or the third indication information, it can send the second indication information and / or the third indication information to the first terminal 101. Exemplarily, after establishing a unicast connection with the first terminal 101, the second terminal 102 can send the second indication information and / or the third indication information to the first terminal 101 (the second indication information and / or the third indication information is sent for the first time after the unicast connection is established).

[0402] Exemplarily, when the second indication information changes compared to the previous second indication information (for example, the second carrier changes compared to the previous second carrier), the second indication information is sent to the first terminal 101. Exemplarily, the previous second indication information may refer to the second indication information last sent to the first terminal 101. Thus, when the second carrier changes, the second terminal 102 can promptly notify the first terminal 101 of the latest second carrier.

[0403] Exemplarily, when the third indication information changes compared to the previous third indication information (for example, the third carrier changes compared to the previous third carrier), the third indication information is sent to the first terminal 101. Exemplarily, the previous third indication information may refer to the third indication information last sent to the first terminal 101. Thus, when the third carrier changes, the second terminal 102 can promptly notify the first terminal 101 of the latest third carrier.

[0404] In some embodiments, the first terminal 101 may send a request message to the second terminal 102 to request the second indication information and / or the third indication information. After receiving the request message, the second terminal 102 sends the second indication information and / or the third indication information to the first terminal 101.

[0405] Illustratively, the first terminal 101 may send the request information to the second terminal 102 via PC5-RRC signaling. Illustratively, the PC5-RRC signaling may be UECapabilityEnquirySidelink signaling or newly defined PC5-RRC signaling, which is not limited in this disclosure. Illustratively, the first terminal 101 may send the request information to the second terminal 102 via other PC5 signaling, such as PC5 MAC CE. This disclosure does not specifically limit this.

[0406] In some embodiments, the request information may include carrier information of the carrier supported by the first terminal 101, and the second terminal 102 may determine the second indication information and / or the third indication information based on the carrier supported by the first terminal 101 and the carrier supported by the second terminal 102.

[0407] Exemplarily, the request information may include carrier information of a fourth carrier supported by the first terminal 101. Exemplarily, the fourth carrier supported by the first terminal 101 includes a carrier supported by the first terminal 101 for receiving and / or sending. Exemplarily, the carrier supported by the first terminal 101 for sending may refer to a carrier that the first terminal 101 can use to send sidelink data, and exemplary, the carrier supported by the first terminal 101 for receiving may refer to a carrier that the first terminal 101 can use to receive sidelink data.

[0408] Exemplarily, the request information may include carrier information of the fifth carrier that the first terminal 101 preferably supports. Exemplarily, the fifth carrier that the first terminal 101 preferably supports may include a carrier that the first terminal 101 prefers to support sending and / or preferably supports receiving. Exemplarily, the carrier that the first terminal 101 prefers to support may be some of the preferred carriers selected by the first terminal 101 on the supported carriers. Exemplarily, the carrier that the first terminal 101 prefers to support sending may refer to the carrier that the first terminal 101 prefers to use for sending sidelink data. Exemplarily, the carrier that the first terminal 101 prefers to support receiving may refer to the carrier that the first terminal 101 prefers to use for receiving sidelink data.

[0409] Exemplarily, the second terminal 102 may determine the second indication information and / or the third indication information based on one or more of the fourth carrier supported by the first terminal 101, the fifth carrier preferred by the first terminal 101, and the carrier supported by the second terminal 102 for reception.

[0410] Exemplarily, the request information may include a carrier identification list, which may include carrier information of carriers supported for transmission and / or carrier information of carriers supported for reception by the first terminal 101. Exemplarily, the one carrier identification list may include carrier information of carriers supported for transmission by the first terminal 101; Exemplarily, the one carrier identification list may include carrier information of carriers supported for reception by the first terminal 101; Exemplarily, the one carrier identification list may include carrier information of carriers supported for transmission and carriers supported for reception by the first terminal 101; Exemplarily, the request information may include two carrier identification lists, one list including carrier information of carriers supported for transmission by the first terminal 101, and the other list including carrier information of carriers supported for reception by the first terminal 101.

[0411] Optionally, the first terminal 101 may send a request message to the second terminal 102 when the resource allocation mode changes. Exemplarily, the second terminal 102 sends the request message when the resource allocation mode of the first terminal 101 is configured or reconfigured from mode 1 to mode 2. Exemplarily, the first terminal 101 sends the request message to the second terminal 102 when the resource allocation mode is configured or reconfigured from mode 2 to mode 1.

[0412] Optionally, the first terminal 101 may send the request information to the second terminal 102 after establishing a unicast connection with the second terminal 102. Exemplarily, the first terminal 101 may send the request information to the second terminal 102 after establishing a unicast connection with the second terminal 102 based on implementation.

[0413] In some embodiments, the first terminal 101 may receive one or more of the second indication information and the third indication information sent by the second terminal 102 .

[0414] In some embodiments, the first terminal 101 may determine a first carrier for carrier aggregation based on the second indication information. The first carrier may be used by the first terminal 101 to transmit sidelink data to the second terminal 102. Alternatively, the first terminal 101 may determine the first carrier for carrier aggregation based on carriers supported for reception by the second terminal 102 and carriers supported for transmission by the first terminal 101.

[0415] Exemplarily, if the transmitting terminal supports transmitting carriers A1, A2, A3, and A4, and the receiving terminal supports receiving carriers A2, A3, and A4, the transmitting terminal may determine the first carrier to be A2, A3, and A4. Exemplarily, if the transmitting terminal supports transmitting carriers A1, A2, A3, and A4, and the receiving terminal supports receiving carriers A2, A3, and A4, the transmitting terminal may determine the first carrier to be either A2 and A4, or A3 and A4. This reduces the number of carriers monitored by the receiving terminal, thereby saving power.

[0416] In some embodiments, the first terminal 101 may determine the first carrier for carrier aggregation based on the third indication information. Alternatively, the first terminal 101 may determine the first carrier for carrier aggregation based on the third carrier that the second terminal 102 preferably supports receiving and the carrier that the first terminal 101 supports sending.

[0417] Exemplarily, the transmitting terminal supports the carriers A1, A2, A3, and A4 for transmission, and the receiving terminal preferentially supports the carriers A2 and A3 for reception. The transmitting terminal may determine that the first carrier is A2 or A3.

[0418] In some embodiments, the first terminal 101 may determine the first carrier for carrier aggregation based on the second indication information and the third indication information. Alternatively, the first terminal 101 may determine the first carrier for carrier aggregation based on the second carrier supported for reception by the second terminal 102, the carrier that the second terminal 102 preferably supports for reception, and the carrier that the first terminal 101 supports for transmission.

[0419] Exemplarily, the transmitting terminal supports the carriers A1, A2, A3, and A4 for transmission, and the receiving terminal supports the carriers A2, A3, and A4 for reception. The receiving terminal preferentially supports the carriers A2 and A3 for reception, and the transmitting terminal may determine the first carriers to be A2, A3, and A4. Exemplarily, the transmitting terminal may determine the first carriers to be A2 and A3.

[0420] In some embodiments, if the first terminal 101 is in an RRC connected state and the resource allocation mode of the first terminal 101 is a mode of autonomously selecting sending resources, the first terminal 101 may send second indication information and / or third indication information to the network device 103. That is, if the first terminal 101 is in an RRC connected state and the resource allocation mode of the first terminal 101 is a mode of autonomously selecting sending resources, the first terminal 101 may send the second indication information and / or third indication information received from the second terminal 102 to the network device 103.

[0421] In some embodiments, when the second indication information changes compared to the previous second indication information (for example, the carrier supported by the second terminal 102 changes compared to the previously supported carrier), the first terminal 101 may send the second indication information to the network device 103. Exemplarily, the previous second indication information may refer to the second indication information last sent to the network device 103.

[0422] In addition, the first terminal 101 can actively obtain the second indication information to determine whether the second indication information has changed. For example, the first terminal 101 can periodically obtain the second indication information to compare the second indication information currently obtained with the second indication information obtained last time. Alternatively, the first terminal 101 can obtain the second indication information and inform the network device 103 only when the second indication information changes. If the first terminal 101 does not obtain new second indication information, the first terminal 101 considers that the second indication information has not changed. Exemplarily, when the carrier supported by the second terminal 102 in unicast communication with the first terminal 101 changes, the second terminal 102 sends the second indication information to the first terminal 101 to inform it of the currently supported carrier.

[0423] In addition, when the second indication information changes, the first terminal 101 notifies the network device 103 of the changed second indication information. Optionally, the second indication information may send the changed new second indication information to the network device 103, or may only send the change amount of the second indication information to the network device 103. For example, when the carrier supported by the second terminal 102 in unicast communication with the first terminal changes from the previous carriers a and b to carriers a and c, the first terminal 101 may send a second indication information to the network device 103 to indicate the carriers a and c supported by the second terminal 102, or may send the second indication information to the network device 103 to indicate that the second terminal 102 no longer supports carrier b and supports carrier c.

[0424] In some embodiments, when the third indication information changes compared to the previous third indication information (for example, the carrier preferentially supported by the second terminal 102 changes compared to the previously preferred carrier preferentially supported), the first terminal 101 may send the third indication information to the network device 103. Exemplarily, the previous third indication information may refer to the third indication information last sent to the network device 103.

[0425] In addition, the first terminal 101 can actively obtain the third indication information to determine whether the third indication information has changed. For example, the first terminal 101 can periodically obtain the third indication information to compare the third indication information currently obtained with the third indication information obtained last time. Alternatively, the first terminal 101 can obtain the third indication information and inform the network device 103 only when the third indication information changes. If the first terminal 101 does not obtain new third indication information, the first terminal 101 considers that the third indication information has not changed. In the case of the third indication information, when the carrier preferred by the second terminal 102 changes, the second terminal 102 sends the third indication information to the first terminal 101 to inform it of the currently preferred supported carrier.

[0426] Exemplarily, the first terminal 101 may send one or more of the second indication information and the third indication information to the network device 103 via Uu RRC signaling. Exemplarily, the Uu RRC signaling may be SUI or UAI or other newly defined Uu RRC signaling, which is not specifically limited in this disclosure.

[0427] In some embodiments, the network device 103 may receive the second indication information and / or the third indication information sent by the first terminal 101 .

[0428] In some embodiments, the network device 103 may determine the first carrier according to one or more of the second indication information and the third indication information.

[0429] In some embodiments, the network device 103 may determine the first carrier based on one or more of the second carrier and the third carrier and the carrier supported by the first terminal 101 .

[0430] Optionally, the network device 103 may determine the first carrier according to one or more of the carriers supported for reception by the second terminal 102 , the carriers preferred to be supported for reception by the second terminal 102 , and the carriers supported for transmission by the first terminal 101 .

[0431] In some embodiments, the first terminal 101 may receive fifth indication information sent by the network device 103 and, based on the fifth indication information, determine a first carrier for carrier aggregation. The fifth indication information may be used to indicate the first carrier determined by the network device 103. For example, the network device 103 may send the fifth indication information to the first terminal 101 via Uu RRC signaling. For example, the Uu RRC signaling may be RRCReconfiguration signaling or newly defined Uu RRC signaling, which is not specifically limited in this disclosure.

[0432] In some embodiments, if the first terminal 101 does not support sending sidelink data on a carrier supported by the second terminal 102 for reception, illustratively, the second terminal 102 supports receiving sidelink data on multiple carriers, where the multiple carriers include legacy carriers supported for transmission and / or reception by R16 / 17 terminals, as well as other carriers. The first terminal 101 only supports sending sidelink data on legacy carriers supported by R16 / 17 terminals, and does not support sending sidelink data on other carriers supported for reception by the second terminal 102. The first terminal 101 may release the unicast connection with the second terminal 102, or may use a single carrier to send sidelink data to the second terminal 102. Exemplarily, the unicast connection is a PC5-RRC connection.

[0433] In some embodiments, if the first terminal 101 does not support sending sidelink data on the carrier that the second terminal 102 preferably supports receiving, for example, the second terminal 102 supports receiving sidelink data on multiple preferred carriers, and the multiple preferred carriers include legacy carriers that the R16 / 17 terminal supports sending and / or supports receiving, and also include other preferred carriers. The first terminal 101 only supports sending sidelink data on the legacy carrier supported by the R16 / 17 terminal, and does not support sending sidelink data on other preferred carriers supported by the second terminal 102. The first terminal 101 can release the unicast connection between the first terminal 101 and the second terminal 102, or can use a single carrier to send sidelink data to the second terminal 102.

[0434] Exemplarily, the single carrier is a carrier supported by R16 / 17 terminals for sending and / or receiving, also referred to as a legacy carrier.

[0435] Step S3702: Send first indication information to the second terminal.

[0436] In some embodiments, the first indication information is used to indicate a first carrier.

[0437] In some embodiments, the first terminal 101 may send first indication information to the second terminal 102 after determining the first carrier.

[0438] In some embodiments, the first terminal 101 may send the first indication information to the second terminal 102 after receiving the fifth indication information sent by the network device 103 .

[0439] In some embodiments, the first terminal 101 may send the first indication information to the second terminal 102 via PC5-RRC signaling. For example, the PC5-RRC signaling may be RRCReconfigurationSidelink signaling or a newly defined PC5-RRC signaling, which is not specifically limited in this disclosure.

[0440] In some embodiments, the first terminal 101 may send the first indication information to the second terminal 102 through other PC5 signaling, such as PC5 MAC CE, which is not specifically limited in this disclosure.

[0441] In some embodiments, the second terminal 102 may receive the first indication information sent by the first terminal 101 .

[0442] In some embodiments, the second terminal 102 may determine whether the first indication information is acceptable. If not, the second terminal 102 may send fourth indication information to the first terminal 101, and the first terminal 101 receives the fourth indication information sent by the second terminal 102. The fourth indication information may be used to instruct the second terminal 102 to reject the first indication information.

[0443] For example, if the first carrier indicated by the first indication information is carrier a and carrier b, and the carriers supported for reception by the second terminal 102 are carrier a and carrier b, but the second terminal 102 does not support simultaneous data reception on carrier a and carrier b due to limited capabilities, then the second terminal 102 may reject the first indication information. For another example, if the first carrier indicated by the first indication information is not the carrier preferred by the second terminal 102, then the second terminal 102 may reject the first indication information.

[0444] Exemplarily, the fourth indication information may be carried by PC5-RRC signaling. Exemplarily, the PC5-RRC signaling may be RRCReconfigurationCompleteSidelink signaling or a newly defined PC5-RRC signaling, which is not specifically limited in the present disclosure.

[0445] Exemplarily, the second terminal 102 may send the fourth indication information to the first terminal 101 through other PC5 signaling, such as PC5 MAC CE, which is not specifically limited in the present disclosure.

[0446] In some embodiments, after receiving the fourth indication information, the first terminal 101 may re-determine the first carrier according to one or more of the second indication information, the third indication information, and the fourth indication information.

[0447] In some embodiments, the first terminal 101 may re-determine the first carrier based on one or more of the second indication information, the third indication information, the fourth indication information, and / or the carriers supported by the first terminal 101.

[0448] In some embodiments, the first terminal 101 can re-determine the first carrier based on the carrier supported by the second terminal 102 for reception, the carrier preferred by the second terminal 102 for reception, one or more of the fourth indication information, and / or the carrier supported by the first terminal 101 for transmission, and notify the second terminal 102 of the re-determined first carrier. Exemplarily, the first carrier re-determined by the first terminal 101 can be notified to the second terminal 102 through the first indication information.

[0449] In some embodiments, the first terminal 101 may send one or more of the second indication information, the third indication information, and the fourth indication information to the network device 103 .

[0450] Exemplarily, the first terminal 101 may send one or more of the second indication information, the third indication information, and the fourth indication information received from the second terminal 102 to the network device 103 via Uu RRC signaling. Exemplarily, the Uu RRC signaling may be SUI or UAI or other newly defined Uu RRC signaling, which is not specifically limited in this disclosure.

[0451] In some embodiments, if the first terminal 101 is in an RRC connected state, the first terminal 101 may send one or more of the second indication information, the third indication information, and the fourth indication information to the network device 103 .

[0452] In some embodiments, if the first terminal 101 is in an RRC connected state and the resource allocation mode of the first terminal is a mode of autonomously selecting transmission resources, the first terminal 101 may send fourth indication information to the network device 103, and the network device 103 receives the fourth indication information sent by the first terminal 101. The fourth indication information is used to instruct the second terminal 102 to reject the first indication information, and the first indication information refers to the first indication information sent by the first terminal 101 to the second terminal 102 after receiving the fifth indication information sent by the network device 103. In some embodiments, the network device 103 may re-determine the first carrier based on one or more of the second indication information, the third indication information, and the fourth indication information.

[0453] In some embodiments, the network device 103 may re-determine the first carrier based on one or more of the second indication information, the third indication information, the fourth indication information, and / or the carriers supported by the first terminal 101.

[0454] In some embodiments, the network device 103 may re-determine the first carrier based on one or more of the carriers supported for reception by the second terminal 102, the carriers preferred for reception by the second terminal 102, the fourth indication information, and / or the carriers supported for transmission by the first terminal 101, and notify the first terminal 101 of the re-determined first carrier, which the first terminal 101 then notifies the second terminal 102. Exemplarily, the first carrier re-determined by the network device 103 may be notified to the first terminal 101 through the fifth indication information. Exemplarily, the first terminal 101 receives the fifth indication information sent by the network device 103 and then notifies the second terminal 102. Exemplarily, the first terminal 101 may notify the second terminal 102 through the first indication information.

[0455] Step S3703: Send sidelink data to the second terminal via the first carrier.

[0456] In some embodiments, the second terminal 102 receives the first indication information, and the first terminal 101 may send sidelink data to the second terminal 102 via the first carrier.

[0457] In some embodiments, the second terminal 102 may receive sidelink data sent by the first terminal 101 via the first carrier.

[0458] The scheme for determining the first carrier by the transmitting terminal involved in the embodiments of the present disclosure is applicable to terminals operating in mode 2. Specifically, the transmitting terminal may be in an RRC connected state, an RRC IDLE (idle) state, an RRC INACTIVE (dormant) state, or an OOC state. Exemplarily, the transmitting terminal is in an RRC IDLE state, an RRC INACTIVE state, or an OOC state.

[0459] The scheme for determining the first carrier by the transmitting terminal involved in the embodiment of the present disclosure is applicable to a terminal operating in mode 1. Exemplarily, the transmitting terminal may be in an RRC connected state.

[0460] The transmitting terminal determines the first carrier based on the granularity of the sidelink data transmission direction. For example, for a source address and destination address pair (A, B), terminal A is the transmitting terminal, and terminal A determines the first carrier for carrier aggregation. The first carrier is used for terminal A to send unicast data to terminal B. For example, for a source address and destination address pair (B, A), terminal B is the transmitting terminal, and terminal B determines the first carrier. The first carrier is used for terminal B to send unicast data to terminal A.

[0461] The solution for determining the first carrier by a network device involved in the embodiment of the present disclosure may be applicable to a terminal that is in an RRC connected state and operates in mode 2.

[0462] The network device determines the first carrier based on the granularity of the sidelink data transmission direction. Exemplarily, for a source address and destination address pair (A, B), with A serving as the transmitting terminal, the network device determines the first carrier for carrier aggregation and notifies terminal A. The first carrier is used for terminal A to send unicast data to terminal B. Exemplarily, for a source address and destination address pair (B, A), with B serving as the transmitting terminal, the network device determines the first carrier and notifies terminal B. The first carrier is used for terminal B to send unicast data to terminal A.

[0463] In some embodiments, a source address may be replaced with a source layer 2 address, a target address may be replaced with a target layer 2 address, and a source address target address pair may be replaced with a source layer 2 address target layer 2 address pair.

[0464] The method for determining a carrier involved in the embodiment of the present disclosure may include at least one of steps S3701 and S3702. For example, step S3701 may be implemented as an independent embodiment, and step S3702 may be implemented as an independent embodiment, but the present invention is not limited thereto.

[0465] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, and the optional methods or optional examples can be arbitrarily combined.

[0466] FIG4A is a flow chart of a method for determining a carrier according to an embodiment of the present disclosure. As shown in FIG4A , the embodiment of the present disclosure relates to a method for determining a carrier, which is used by a second terminal 102. The method includes:

[0467] Step S4101: Send the second indication information and / or the third indication information.

[0468] The optional implementation of step S4101 can refer to the optional implementation of step S2101 in Figure 2A and other related parts in the embodiment involved in Figure 2A, which will not be repeated here.

[0469] In some embodiments, the second terminal 102 may send the second indication information and / or the third indication information to the first terminal 101, but is not limited thereto and may also send the second indication information and / or the third indication information to other entities.

[0470] Step S4102: Obtain first indication information.

[0471] The optional implementation of step S4102 can refer to step S2103 in FIG. 2A , the optional implementation of step S2205 in FIG. 2B , and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.

[0472] In some embodiments, the second terminal 102 receives the first indication information sent by the first terminal 101, but is not limited thereto and may also receive the first indication information sent by other entities.

[0473] In some embodiments, the second terminal 102 obtains first indication information specified by the protocol.

[0474] In some embodiments, the second terminal 102 obtains the first indication information from an upper layer(s).

[0475] The method for determining a carrier involved in the embodiment of the present disclosure may include at least one of steps S4101 and S4102. For example, step S4101 may be implemented as an independent embodiment, and step S4102 may be implemented as an independent embodiment, but the present invention is not limited thereto.

[0476] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, and the optional methods or optional examples can be arbitrarily combined.

[0477] FIG4B is a flow chart of a method for determining a carrier according to an embodiment of the present disclosure. As shown in FIG4B , the embodiment of the present disclosure relates to a method for determining a carrier, which is used by the second terminal 102. The method includes:

[0478] Step S4201: Send second indication information and / or third indication information to the first terminal.

[0479] The optional implementation of step S4201 can refer to the optional implementation of step S2101 in Figure 2A and other related parts in the embodiment involved in Figure 2A, which will not be repeated here.

[0480] Step S4202: Receive first indication information sent by the first terminal.

[0481] The optional implementation of step S4202 can refer to the optional implementation of step S2103 in Figure 2A, step S2205 in Figure 2B, and other related parts in the embodiment involved in Figure 2A, which will not be repeated here.

[0482] Step S4203: Receive sidelink data sent by the first terminal through the first carrier.

[0483] The optional implementation of step S4203 can refer to step S2103 in FIG. 2A , the optional implementation of step S2205 in FIG. 2B , and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.

[0484] The method for determining a carrier involved in the embodiments of the present disclosure may include at least one of steps S4201 to S4203. For example, step S4201 may be implemented as an independent embodiment, step S4202 may be implemented as an independent embodiment, step S4203 may be implemented as an independent embodiment, step S4201 and step S4202 may be implemented as independent embodiments, and step S4202 and step S4203 may be implemented as independent embodiments, but the present invention is not limited thereto.

[0485] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, and the optional methods or optional examples can be arbitrarily combined.

[0486] FIG4C is a flow chart of a method for determining a carrier according to an embodiment of the present disclosure. As shown in FIG4C , the embodiment of the present disclosure relates to a method for determining a carrier, which is used by the second terminal 102. The method includes:

[0487] Step S4301: Send second indication information and / or third indication information to the first terminal.

[0488] The optional implementation of step S4301 can refer to the optional implementation of step S2101 in Figure 2A and other related parts in the embodiment involved in Figure 2A, which will not be repeated here.

[0489] Step S4302: Receive first indication information sent by the first terminal.

[0490] The optional implementation of step S4302 can refer to the optional implementation of step S2103 in Figure 2A, step S2205 in Figure 2B, and other related parts in the embodiment involved in Figure 2A, which will not be repeated here.

[0491] Step S4303: Send fourth indication information to the first terminal.

[0492] The optional implementation of step S4303 can refer to step S2103 in FIG. 2A , the optional implementation of step S2205 in FIG. 2B , and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.

[0493] The method for determining a carrier involved in the embodiments of the present disclosure may include at least one of steps S4301 to S4303. For example, step S4301 may be implemented as an independent embodiment, step S4302 may be implemented as an independent embodiment, step S4303 may be implemented as an independent embodiment, step S4301 and step S4302 may be implemented as independent embodiments, and step S4302 and step S4303 may be implemented as independent embodiments, but the present invention is not limited thereto.

[0494] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, and the optional methods or optional examples can be arbitrarily combined.

[0495] FIG4D is a flow chart of a method for determining a carrier according to an embodiment of the present disclosure. As shown in FIG4D , the embodiment of the present disclosure relates to a method for determining a carrier, which is used by the second terminal 102, and the method includes:

[0496] Step S4401: Receive first indication information sent by a first terminal.

[0497] The optional implementation of step S4401 can refer to step S2103 in FIG. 2A , the optional implementation of step S2205 in FIG. 2B , and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.

[0498] In some embodiments, the first indication information is used to indicate the first carrier.

[0499] In some embodiments, the first terminal 101 may send first indication information to the second terminal 102 after determining the first carrier.

[0500] In some embodiments, the first terminal 101 may send the first indication information to the second terminal 102 after receiving the fifth indication information sent by the network device 103 .

[0501] In some embodiments, the first terminal 101 may send the first indication information to the second terminal 102 via PC5-RRC signaling. For example, the PC5-RRC signaling may be RRCReconfigurationSidelink signaling or a newly defined PC5-RRC signaling, which is not specifically limited in this disclosure.

[0502] In some embodiments, the first terminal 101 may send the first indication information to the second terminal 102 through other PC5 signaling, such as PC5 MAC CE, which is not specifically limited in this disclosure.

[0503] In some embodiments, the second terminal 102 may receive the first indication information sent by the first terminal 101 .

[0504] In some embodiments, the second terminal 102 may determine whether the first indication information is acceptable. If not, the second terminal 102 may send fourth indication information to the first terminal 101, and the first terminal 101 receives the fourth indication information sent by the second terminal 102. The fourth indication information may be used to instruct the second terminal 102 to reject the first indication information.

[0505] For example, if the first carrier indicated by the first indication information is carrier a and carrier b, and the carriers supported for reception by the second terminal 102 are carrier a and carrier b, but the second terminal 102 does not support simultaneous data reception on carrier a and carrier b due to limited capabilities, then the second terminal 102 may reject the first indication information. For another example, if the first carrier indicated by the first indication information is not the carrier preferred by the second terminal 102, then the second terminal 102 may reject the first indication information.

[0506] Exemplarily, the fourth indication information may be carried by PC5-RRC signaling. Exemplarily, the PC5-RRC signaling may be RRCReconfigurationCompleteSidelink signaling or a newly defined PC5-RRC signaling, which is not specifically limited in the present disclosure.

[0507] Exemplarily, the second terminal 102 may send the fourth indication information to the first terminal 101 through other PC5 signaling, such as PC5 MAC CE, which is not specifically limited in the present disclosure.

[0508] In some embodiments, after receiving the fourth indication information, the first terminal 101 may re-determine the first carrier according to one or more of the second indication information, the third indication information, and the fourth indication information.

[0509] In some embodiments, the first terminal 101 may re-determine the first carrier based on one or more of the second indication information, the third indication information, the fourth indication information, and / or the carriers supported by the first terminal 101.

[0510] In some embodiments, the first terminal 101 can re-determine the first carrier based on the carrier supported by the second terminal 102 for reception, the carrier preferred by the second terminal 102 for reception, one or more of the fourth indication information, and / or the carrier supported by the first terminal 101 for transmission, and notify the second terminal 102 of the re-determined first carrier. Exemplarily, the first carrier re-determined by the first terminal 101 can be notified to the second terminal 102 through the first indication information.

[0511] In some embodiments, the first terminal 101 may send one or more of the second indication information, the third indication information, and the fourth indication information to the network device 103 .

[0512] Exemplarily, the first terminal 101 may send one or more of the second indication information, the third indication information, and the fourth indication information received from the second terminal 102 to the network device 103 via Uu RRC signaling. Exemplarily, the Uu RRC signaling may be SUI or UAI or other newly defined Uu RRC signaling, which is not specifically limited in this disclosure.

[0513] In some embodiments, if the first terminal 101 is in an RRC connected state, the first terminal 101 may send one or more of the second indication information, the third indication information, and the fourth indication information to the network device 103 .

[0514] In some embodiments, if the first terminal 101 is in an RRC connected state and the resource allocation mode of the first terminal is a mode of autonomously selecting transmission resources, the first terminal 101 may send fourth indication information to the network device 103, and the network device 103 receives the fourth indication information sent by the first terminal 101. The fourth indication information is used to instruct the second terminal 102 to reject the first indication information, and the first indication information refers to the first indication information sent by the first terminal 101 to the second terminal 102 after receiving the fifth indication information sent by the network device 103. In some embodiments, the network device 103 may re-determine the first carrier based on one or more of the second indication information, the third indication information, and the fourth indication information.

[0515] In some embodiments, the network device 103 may re-determine the first carrier based on one or more of the second indication information, the third indication information, the fourth indication information, and / or the carriers supported by the first terminal 101.

[0516] In some embodiments, the network device 103 may re-determine the first carrier based on one or more of the carriers supported for reception by the second terminal 102, the carriers preferred for reception by the second terminal 102, the fourth indication information, and / or the carriers supported for transmission by the first terminal 101, and notify the first terminal 101 of the re-determined first carrier, which the first terminal 101 then notifies the second terminal 102. Exemplarily, the first carrier re-determined by the network device 103 may be notified to the first terminal 101 through the fifth indication information. Exemplarily, the first terminal 101 receives the fifth indication information sent by the network device 103 and then notifies the second terminal 102. Exemplarily, the first terminal 101 may notify the second terminal 102 through the first indication information.

[0517] Step S4402: Receive sidelink data sent by the first terminal through the first carrier.

[0518] In some embodiments, the second terminal 102 receives the first indication information, and the first terminal 101 may send sidelink data to the second terminal 102 via the first carrier.

[0519] In some embodiments, the second terminal 102 may receive sidelink data sent by the first terminal 101 via the first carrier.

[0520] The method for determining a carrier involved in the embodiment of the present disclosure may include at least one of steps S4401 and S4402. For example, step S4401 may be implemented as an independent embodiment, and step S4402 may be implemented as an independent embodiment, but the present invention is not limited thereto.

[0521] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, and the optional methods or optional examples can be arbitrarily combined.

[0522] FIG5A is a flow chart of a method for determining a carrier according to an embodiment of the present disclosure. As shown in FIG5A , the embodiment of the present disclosure relates to a method for determining a carrier, which is used in a network device 103. The method includes:

[0523] Step S5101: Obtain second indication information and / or third indication information.

[0524] The optional implementation of step S5101 can refer to the optional implementation of step S2202 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0525] In some embodiments, the network device 103 receives the second indication information and / or the third indication information sent by the first terminal 101, but is not limited thereto and may also receive the second indication information and / or the third indication information sent by other entities.

[0526] In some embodiments, the first terminal 101 is in an RRC connected state and the resource allocation method of the first terminal 101 is a method of autonomously selecting sending resources.

[0527] In some embodiments, the network device 103 obtains the second indication information and / or the third indication information specified by the protocol.

[0528] In some embodiments, the network device 103 obtains the second indication information and / or the third indication information from an upper layer(s).

[0529] Step S5102: Determine a first carrier for carrier aggregation.

[0530] The optional implementation of step S5102 can refer to the optional implementation of step S2203 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0531] Step S5103: Send the fifth indication information.

[0532] The optional implementation of step S5103 can refer to the optional implementation of step S2204 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0533] In some embodiments, the network device 103 may send the fifth indication information to the first terminal, but is not limited thereto, and may also send the fifth indication information to other entities.

[0534] In some embodiments, step S5101 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0535] The method for determining a carrier involved in the embodiments of the present disclosure may include at least one of steps S5101 to S5103. For example, step S5101 may be implemented as an independent embodiment, step S5102 may be implemented as an independent embodiment, step S5102 may be implemented as an independent embodiment, step S5101 and step S5102 may be implemented as independent embodiments, and step S5102 and step S5103 may be implemented as independent embodiments, but the present invention is not limited thereto.

[0536] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, and the optional methods or optional examples can be arbitrarily combined.

[0537] FIG5B is a flow chart of a method for determining a carrier according to an embodiment of the present disclosure. As shown in FIG5B , the embodiment of the present disclosure relates to a method for determining a carrier, which is used in a network device 103 and includes:

[0538] Step S5201: Receive second indication information and / or third indication information sent by the first terminal.

[0539] The optional implementation of step S5201 can refer to the optional implementation of step S2202 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0540] In some embodiments, the first terminal 101 is in an RRC connected state and the resource allocation method of the first terminal 101 is a method of autonomously selecting sending resources.

[0541] Step S5202: Determine the first carrier according to the second indication information and / or the third indication information.

[0542] The optional implementation of step S5202 can refer to the optional implementation of step S2203 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0543] Step S5203: Send fifth indication information to the first terminal.

[0544] The optional implementation of step S5203 can refer to the optional implementation of step S2203 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0545] In some embodiments, step S5201 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0546] The method for determining a carrier involved in the embodiments of the present disclosure may include at least one of steps S5201 to S5203. For example, step S5201 may be implemented as an independent embodiment, step S5202 may be implemented as an independent embodiment, step S5203 may be implemented as an independent embodiment, step S5201 and step S5202 may be implemented as independent embodiments, and step S5202 and step S5203 may be implemented as independent embodiments, but the present invention is not limited thereto.

[0547] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, and the optional methods or optional examples can be arbitrarily combined.

[0548] FIG5C is a flow chart of a method for determining a carrier according to an embodiment of the present disclosure. As shown in FIG5C , the embodiment of the present disclosure relates to a method for determining a carrier, which is used in a network device 103 and includes:

[0549] Step S5301: Receive second indication information and / or third indication information sent by the first terminal.

[0550] The optional implementation of step S5301 can refer to the optional implementation of step S2202 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0551] In some embodiments, the first terminal 101 is in an RRC connected state and the resource allocation method of the first terminal 101 is a method of autonomously selecting sending resources.

[0552] Step S5302: Determine the first carrier according to the second indication information and / or the third indication information.

[0553] The optional implementation of step S5302 can refer to the optional implementation of step S2203 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0554] Step S5303: Send fifth indication information to the first terminal.

[0555] The optional implementation of step S5303 can refer to the optional implementation of step S2203 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0556] Step S5304: Receive fourth indication information sent by the first terminal.

[0557] The optional implementation of step S5304 can refer to the optional implementation of step S2203 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0558] Step S5305: re-determine the first carrier according to one or more of the second indication information, the third indication information, and the fourth indication information.

[0559] The optional implementation of step S5305 can refer to the optional implementation of step S2203 in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0560] In some embodiments, step S5301 and step S5305 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0561] The method for determining a carrier involved in the embodiments of the present disclosure may include at least one of steps S5301 to S5305. For example, step S5301 may be implemented as an independent embodiment, step S5302 may be implemented as an independent embodiment, step S5303 may be implemented as an independent embodiment, step S5304 may be implemented as an independent embodiment, and step S5305 may be implemented as an independent embodiment. Steps S5302, S5303, and S5304 may be implemented as independent embodiments, and steps S5302, S5303, S5304, and S5305 may be implemented as independent embodiments, but are not limited thereto.

[0562] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, and the optional methods or optional examples can be arbitrarily combined.

[0563] FIG5D is a flow chart of a method for determining a carrier according to an embodiment of the present disclosure. As shown in FIG5D , the embodiment of the present disclosure relates to a method for determining a carrier, which is used in a network device 103. The method includes:

[0564] Step S5401: Receive one or more of the second indication information, the third indication information, and the fourth indication information sent by the first terminal.

[0565] In some embodiments, the first terminal 101 is in an RRC connected state and the resource allocation method of the first terminal 101 is a method of autonomously selecting sending resources.

[0566] In some embodiments, the second indication information may be used to indicate a second carrier supported by the second terminal 102 , and the third indication information may be used to indicate a third carrier that the second terminal 102 preferably supports.

[0567] In some embodiments, "carrier," "frequency band," "spectrum," and "frequency" may be used interchangeably.

[0568] In some embodiments, the second carrier supported by the second terminal 102 may include a carrier supported for sending and / or supported for receiving by the second terminal 102. Exemplarily, the carrier supported for sending by the second terminal 102 may refer to a carrier that the second terminal 102 can use to send sidelink data, and the carrier supported for receiving by the second terminal 102 may refer to a carrier that the second terminal 102 can use to receive sidelink data.

[0569] In some embodiments, the third carrier that the second terminal 102 preferably supports may include a carrier that the second terminal 102 preferably supports for transmission and / or reception. Exemplarily, the third carrier that the second terminal 102 preferably supports may be a portion of the preferred carriers selected by the second terminal 102 over the supported second carriers. Exemplarily, the carrier that the second terminal 102 preferably supports for transmission may refer to a carrier that the second terminal 102 may preferably use for transmitting sidelink data, and the carrier that the second terminal 102 preferably supports for reception may refer to a carrier that the second terminal 102 may preferably use for receiving sidelink data. Here, "preferred" may refer to a carrier that the second terminal 102 desires to use for transmitting or receiving information. That is, the second terminal 102 may recommend a single carrier that it desires to use to the first terminal 101, or may recommend one or more of multiple carriers that it desires to use to the first terminal 101, so that the first terminal 101 determines carriers that can be aggregated based on the carrier that the second terminal 102 desires to use. The second terminal 102 may inform the network device 103, through the first terminal 101, of the carrier that the second terminal 102 desires to use, so that the network device 103 determines carriers that can be aggregated based on the carrier that the second terminal 102 desires to use.

[0570] In some embodiments, the support described in the present disclosure may refer to support for sending sidelink data, or support for receiving sidelink data, or support for sending and receiving sidelink data.

[0571] In some embodiments, the supporting sending and / or supporting receiving described in the present disclosure may refer to supporting sending and / or supporting receiving sidelink data.

[0572] In some embodiments, the support for sending described in the present disclosure may refer to supporting the sending of sidelink data, and the support for receiving may refer to supporting the receiving of sidelink data.

[0573] In some embodiments, the first terminal 101 may receive one or more of the second indication information and the third indication information sent by the second terminal 102 .

[0574] In some embodiments, if the first terminal 101 is in an RRC connected state and the resource allocation mode of the first terminal 101 is a mode of autonomously selecting sending resources, the first terminal 101 may send second indication information and / or third indication information to the network device 103. That is, if the first terminal 101 is in an RRC connected state and the resource allocation mode of the first terminal 101 is a mode of autonomously selecting sending resources, the first terminal 101 may send the second indication information and / or third indication information received from the second terminal 102 to the network device 103.

[0575] Exemplarily, the first terminal 101 may send one or more of the second indication information and the third indication information to the network device 103 via Uu RRC signaling. Exemplarily, the Uu RRC signaling may be SUI or UAI or other newly defined Uu RRC signaling, which is not specifically limited in this disclosure.

[0576] In some embodiments, the network device 103 may receive the second indication information and / or the third indication information sent by the first terminal 101 .

[0577] In some embodiments, the network device 103 may determine the first carrier according to one or more of the second indication information and the third indication information.

[0578] In some embodiments, the network device 103 may determine the first carrier based on one or more of the second carrier and the third carrier and the carrier supported by the first terminal 101 .

[0579] Optionally, the network device 103 may determine the first carrier according to one or more of the carriers supported for reception by the second terminal 102 , the carriers preferred to be supported for reception by the second terminal 102 , and the carriers supported for transmission by the first terminal 101 .

[0580] In some embodiments, the first terminal 101 may receive fifth indication information sent by the network device 103 and determine a first carrier for carrier aggregation based on the fifth indication information. The fifth indication information may be used to indicate the first carrier determined by the network device 103, and the first carrier may be used by the first terminal 101 to send sidelink data to the second terminal 102.

[0581] Illustratively, the network device 103 may send the fifth indication information to the first terminal 101 via Uu RRC signaling. Illustratively, the Uu RRC signaling may be RRCReconfiguration signaling or newly defined Uu RRC signaling, which is not specifically limited in the present disclosure.

[0582] In some embodiments, after receiving the fifth indication information sent by the network device 103 , the first terminal 101 sends the first indication information to the second terminal 102 .

[0583] In some embodiments, after receiving the fifth indication information, the first terminal 101 may determine the first carrier according to the fifth indication information and send the first indication information to the second terminal 102 .

[0584] In some embodiments, the second terminal 102 may determine whether the first indication information is acceptable. If not, the second terminal 102 may send fourth indication information to the first terminal 101, and the first terminal 101 receives the fourth indication information sent by the second terminal 102. The fourth indication information may be used to instruct the second terminal 102 to reject the first indication information.

[0585] For example, if the first carrier indicated by the first indication information is carrier a and carrier b, and the carriers supported for reception by the second terminal 102 are carrier a and carrier b, but the second terminal 102 does not support simultaneous data reception on carrier a and carrier b due to limited capabilities, then the second terminal 102 may reject the first indication information. For another example, if the first carrier indicated by the first indication information is not the carrier preferred by the second terminal 102, then the second terminal 102 may reject the first indication information.

[0586] Exemplarily, the fourth indication information may be carried by PC5-RRC signaling. Exemplarily, the PC5-RRC signaling may be RRCReconfigurationCompleteSidelink signaling or a newly defined PC5-RRC signaling, which is not specifically limited in the present disclosure.

[0587] Exemplarily, the second terminal 102 may send the fourth indication information to the first terminal 101 through other PC5 signaling, such as PC5 MAC CE, which is not specifically limited in the present disclosure.

[0588] In some embodiments, the first terminal 101 may send fourth indication information to the network device 103. The network device 103 receives the fourth indication information and re-determines the first carrier based on one or more of the second indication information, the third indication information, and the fourth indication information. Exemplarily, the first terminal 101 sends the fourth indication information to the network device 103 via Uu RRC signaling. Exemplarily, the Uu RRC signaling may be SUI, UAI, or other newly defined Uu RRC signaling, which is not specifically limited in this disclosure.

[0589] Exemplarily, the first terminal 101 may send one or more of the second indication information, the third indication information, and the fourth indication information received from the second terminal 102 to the network device 103 via Uu RRC signaling. Exemplarily, the Uu RRC signaling may be SUI or UAI or other newly defined Uu RRC signaling, which is not specifically limited in this disclosure.

[0590] In some embodiments, the network device 103 re-determines the first carrier based on one or more of the second indication information, the third indication information, the fourth indication information, and / or the carriers supported by the first terminal 101.

[0591] In some embodiments, the network device 103 may re-determine the first carrier based on one or more of the carriers supported for reception by the second terminal 102, the carriers preferred for reception by the second terminal 102, the fourth indication information, and / or the carriers supported for transmission by the first terminal 101, and notify the first terminal 101 of the re-determined first carrier, which the first terminal 101 then notifies the second terminal 102. Exemplarily, the first carrier re-determined by the network device 103 may be notified to the first terminal 101 through the fifth indication information. Exemplarily, the first terminal 101 receives the fifth indication information sent by the network device 103 and then notifies the second terminal 102. Exemplarily, the first terminal 101 may notify the second terminal 102 through the first indication information.

[0592] The solution for determining the first carrier by a network device involved in the embodiment of the present disclosure may be applicable to a terminal that is in an RRC connected state and operates in mode 2.

[0593] The method for determining a carrier involved in the embodiments of the present disclosure is determined according to the granularity of the sidelink data transmission direction. Exemplarily, for a source address and target address pair (A, B), A is the transmitting terminal, and the network device determines the first carrier for carrier aggregation and notifies terminal A. The first carrier is used by terminal A to send unicast data to terminal B. Exemplarily, for a source address and target address pair (B, A), B is the transmitting terminal, and the network device determines the first carrier and notifies terminal B. The first carrier is used by terminal B to send unicast data to terminal A.

[0594] In some embodiments, a source address may be replaced with a source layer 2 address, a target address may be replaced with a target layer 2 address, and a source address target address pair may be replaced with a source layer 2 address target layer 2 address pair.

[0595] In this embodiment or example, the optional modes or optional examples may be arbitrarily combined unless there is any contradiction.

[0596] FIG6 is an interactive diagram illustrating a method for determining a carrier according to an embodiment of the present disclosure. As shown in FIG6 , the embodiment of the present disclosure relates to a method for determining a carrier, which is used in a communication system 100, wherein the communication system 100 includes a first terminal 101 and a second terminal 102. The method includes:

[0597] Step S6101: Determine a first carrier for carrier aggregation.

[0598] The optional implementation of step S6101 can be found in the optional implementation of step S2201 and step S2202 in Figure 2A, the optional implementation of step S2201, step S2202, and step S2203 in Figure 2B, and other related parts in the embodiments involved in Figures 2A and 2B, which will not be repeated here.

[0599] Step S6102: The first terminal 101 sends first indication information to the second terminal 102.

[0600] The optional implementation of step S6102 can refer to the optional implementation of step S2103 in Figure 2A, the optional implementation of step S2204 and step S2205 in Figure 2B, and other related parts in the embodiments involved in Figures 2A and 2B, which will not be repeated here.

[0601] Step S6103: The first terminal 101 sends sidelink data to the second terminal 102 via the first carrier.

[0602] In some embodiments, the second terminal 102 may receive sidelink data sent by the first terminal 101 via the first carrier.

[0603] The optional implementation of step S6103 can refer to the optional implementation of step S2103 in Figure 2A, the optional implementation of step S2204 and step S2205 in Figure 2B, and other related parts in the embodiments involved in Figures 2A and 2B, which will not be repeated here.

[0604] The method for determining a carrier involved in the embodiments of the present disclosure may include at least one of steps S6101 to S6103. For example, step S6101 may be implemented as an independent embodiment, step S6102 may be implemented as an independent embodiment, step S6103 may be implemented as an independent embodiment, step S6101 and step S6102 may be implemented as independent embodiments, and step S6102 and step S6103 may be implemented as independent embodiments, but the present invention is not limited thereto.

[0605] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, and the optional methods or optional examples can be arbitrarily combined.

[0606] The following is an exemplary introduction to the above method.

[0607] In the present disclosure, the transmitting terminal determines the aggregated carriers and notifies the receiving terminal.

[0608] Optional embodiment: The aggregated carrier is determined according to the granularity of the SL data transmission direction (direction)

[0609] For example, for a source address and destination address pair (A, B), terminal A is the transmitting terminal, and terminal A determines the carrier used for carrier aggregation. The aggregated carrier is used by terminal A to send unicast data to terminal B. For a source address and destination address pair (B, A), terminal B is the transmitting terminal, and terminal B determines the carrier used for carrier aggregation. The aggregated carrier is used by terminal B to send unicast data to terminal A.

[0610] In an optional embodiment, the receiving terminal notifies the sending terminal of the carrier / frequency band supported for reception through the first information.

[0611] Optionally, the receiving terminal notifies the transmitting terminal of the carrier / frequency band supported for reception via PC5-RRC signaling. Exemplarily, the receiving terminal notifies the transmitting terminal of the carrier / frequency band supported for transmission via PC5-RRC signaling. Exemplarily, the PC5-RRC signaling may be UECapabilityInformationSidelink signaling, UEAssistanceInformationSidelink signaling, or newly defined PC5-RRC signaling. Exemplarily, the receiving terminal may notify the transmitting terminal of the first information via other PC5 signaling, such as a PC5 MAC CE. This is not specifically limited in this disclosure.

[0612] Optionally, the receiving terminal may notify the sending terminal of the preferred carrier / frequency band. Exemplarily, the receiving terminal may select some preferred carriers / frequency bands on the carriers / frequency bands supported for reception, and notify the sending terminal, for example, through a second information indication. The receiving terminal may send only the first information to the sending terminal, or may send only the second information to the sending terminal, or may send both the first information and the second information to the sending terminal. The first information and the second information may be carried by the same PC5-RRC signaling, or may be carried by different PC5-RRC signaling. Exemplarily, the receiving terminal may notify the sending terminal of the second information through other PC5 signaling, such as PC5 MAC CE. This is not specifically limited in the present disclosure.

[0613] Optionally, the receiving terminal may send the first information and / or the second information based on the request of the transmitting terminal. Exemplarily, the transmitting terminal may request the receiving terminal to send the first information and / or the second information through PC5-RRC signaling. Exemplarily, the PC5-RRC signaling may be UECapabilityEnquirySidelink signaling or a newly defined PC5-RRC signaling. Optionally, the transmitting terminal may notify the receiving terminal of the carrier / frequency band supported for sending in the request signaling. The receiving terminal may determine the first information and / or the second information based on the carrier / frequency band supported for receiving and the carrier / frequency band supported for sending by the transmitting terminal. Exemplarily, the transmitting terminal may be configured / reconfigured from mode 1 to mode 2 and / or mode 2 to mode 1 in the operating mode, and request the receiving terminal to send the first information and / or the second information through PC5-RRC signaling.

[0614] Exemplarily, the receiving terminal may not send the first information and / or the second information based on the request of the sending terminal. Exemplarily, if the receiving terminal is interested in sending the first information and / or the second information, it may send the first information and / or the second information if the first information and / or the second information has not been sent before or the first information and / or the second information has changed compared to before.

[0615] The PC5-RRC signaling may include a carrier identifier / frequency band list (a first list), where the first list indicates the carriers / frequency bands supported for reception by the receiving terminal, and specifically may indicate that the terminal supports transmission / reception on the carriers / frequency bands. One list may indicate both carriers / frequency bands that support transmission and reception, and one list may indicate only carriers / frequency bands that support transmission (optional), while another list may indicate only carriers / frequency bands that support reception (optional).

[0616] In an optional embodiment, the transmitting terminal determines the aggregated carriers according to the first information and / or the second information.

[0617] Optionally, the transmitting terminal determines the aggregated carrier based on the carriers / frequency bands it supports for transmission, the first information, and / or the second information. The aggregated carrier is used to send unicast data to the receiving terminal. Exemplarily, if the carriers / frequency bands supported by the transmitting terminal for transmission are ABCD, and the carriers / frequency bands supported by the receiving terminal for reception are BCD, the transmitting terminal may determine the aggregated carrier as BCD. Exemplarily, the transmitting terminal may determine the aggregated carrier as BC, BD, or CD. This is not specifically limited in the present disclosure. This can reduce the number of carriers monitored by the receiving terminal, thereby saving power.

[0618] In an optional embodiment, the transmitting terminal notifies the receiving terminal of the aggregated carriers through third information.

[0619] Optionally, the transmitting terminal notifies the receiving terminal of the aggregated carriers via PC5-RRC signaling. Exemplarily, the transmitting terminal notifies the receiving terminal of the third information via PC5-RRC signaling. Exemplarily, the PC5-RRC signaling may be RRCReconfigurationSidelink signaling or newly defined PC5-RRC signaling, which is not specifically limited in this disclosure. Exemplarily, the transmitting terminal may notify the receiving terminal of the third information via other PC5 signaling, such as a PC5 MAC CE. This disclosure does not specifically limit this.

[0620] In an optional embodiment, the receiving terminal may reject the aggregated carriers determined by the transmitting terminal.

[0621] Optionally, upon receiving the third information, the receiving terminal may determine, based on the terminal implementation, whether the aggregated carrier determined by the transmitting terminal is acceptable. If unacceptable, the receiving terminal may reject the aggregated carrier determined by the transmitting terminal and notify the transmitting terminal, for example, by indicating the fourth information. The fourth information may be carried via PC5-RRC signaling. Exemplarily, the PC5-RRC signaling may be RRCReconfigurationCompleteSidelink signaling or a newly defined PC5-RRC signaling, which is not specifically limited in this disclosure. Exemplarily, the receiving terminal may notify the transmitting terminal of the fourth information via other PC5 signaling, such as PC5 MAC CE. This is not specifically limited in this disclosure.

[0622] Optional embodiment: The solution in which the transmitting terminal determines the aggregated carriers is applicable to the transmitting terminal operating in mode 2.

[0623] Optionally, the transmitting terminal operates in mode 2. Specifically, the transmitting terminal may be in an RRC connected state, an RRC IDLE / INACTIVE state, or an OOC state. Specifically, the transmitting terminal may be limited to being in an RRC IDLE / INACTIVE / OOC state.

[0624] Optional embodiment: A sending terminal in an RRC connected state and operating in mode 2 may notify the network device of the first information and / or the second information and / or the fourth information.

[0625] Optionally, the sending terminal may notify the network device of the first information and / or the second information and / or the fourth information through Uu RRC signaling. Exemplarily, the Uu RRC signaling may be SUI or UAI or other newly defined RRC signaling. The network device determines the aggregated carrier by obtaining the first information and / or the second information and / or the fourth information, in combination with the carrier / frequency band supported by the sending terminal, and notifies the sending terminal through Uu RRC signaling. The Uu RRC signaling may be RRCReconfiguration signaling or other signaling, which is not specifically limited in this disclosure. The sending terminal receives the aggregated carrier configured by the network device, and notifies the receiving terminal (third information) through PC5-RRC signaling.

[0626] In an optional embodiment, the transmitting terminal determines that transmission is not supported on any carrier supported by the receiving terminal, and the transmitting terminal notifies a higher layer to release the PC5-RRC connection.

[0627] In some embodiments, aggregated carriers, carriers used for carrier aggregation, and first carriers used for carrier aggregation may be interchangeable.

[0628] In the embodiments of the present disclosure, some or all of the steps and their optional implementations may be arbitrarily combined with some or all of the steps in other embodiments, or may be arbitrarily combined with the optional implementations of other embodiments.

[0629] The embodiments of the present disclosure further provide an apparatus for implementing any of the above methods. For example, an apparatus is provided, comprising units or modules for implementing each step performed by a terminal in any of the above methods. For another example, another apparatus is provided, comprising units or modules for implementing each step performed by a network device (e.g., an access network device, a core network function node, a core network device, etc.) in any of the above methods.

[0630] It should be understood that the division of the various units or modules in the above device is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a physical entity, or they may be physically separated. In addition, the units or modules in the device may be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and the memory stores instructions. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the various units or modules of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory within the device or a memory outside the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units or modules can be realized by designing the hardware circuits. The above-mentioned hardware circuits can be understood as one or more processors; for example, in one implementation, the above-mentioned hardware circuit is an application-specific integrated circuit (ASIC), which realizes the functions of some or all of the above units or modules by designing the logical relationship of the components in the circuit; for example, in another implementation, the above-mentioned hardware circuit can be realized by a programmable logic device (PLD). Taking a field programmable gate array (FPGA) as an example, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by configuring the configuration file, thereby realizing the functions of some or all of the above units or modules. All units or modules of the above devices can be realized in the form of software called by the processor, or in the form of hardware circuits, or in part by the form of software called by the processor, and the rest by hardware circuits.

[0631] In the embodiments of the present disclosure, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction reading and execution capabilities, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationship of the hardware circuit. The logical relationship of the above-mentioned hardware circuit is fixed or reconfigurable. For example, the processor is a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and implementing the hardware circuit configuration can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0632] Figure 7A is a schematic diagram of the structure of the first terminal proposed in an embodiment of the present disclosure. As shown in Figure 7A, the first terminal 7100 may include: at least one of a transceiver module 7101, a processing module 7102, etc. In some embodiments, the processing module is used to determine a first carrier for carrier aggregation; the transceiver module is used to send a first indication information to the second terminal, the first indication information is used to indicate the first carrier, and the second terminal is a terminal that establishes a unicast connection with the first terminal; and sidelink data is sent to the second terminal via the first carrier. Optionally, the transceiver module is used to execute at least one of the communication steps such as sending and / or receiving (for example, step S2103, but not limited to this) executed by the first terminal 101 in any of the above methods, which will not be repeated here. Optionally, the processing module is used to execute at least one of the other steps (for example, step S2102, but not limited to this) executed by the first terminal 101 in any of the above methods, which will not be repeated here.

[0633] Figure 7B is a structural diagram of the second terminal proposed in an embodiment of the present disclosure. As shown in Figure 7B, the second terminal 7200 may include: at least one of a transceiver module 7201, a processing module 7202, etc. In some embodiments, the above-mentioned transceiver module is used to receive first indication information sent by the first terminal, and the first indication information is used to indicate the first carrier used for carrier aggregation, and the second terminal is a terminal that establishes a unicast connection with the first terminal; and receives sidelink data sent by the first terminal through the first carrier. Optionally, the above-mentioned transceiver is used to perform at least one of the communication steps such as sending and / or receiving (for example, step S4101, but not limited to this) performed by the second terminal 102 in any of the above methods, which will not be repeated here. Optionally, the above-mentioned processing module is used to perform at least one of the other steps performed by the second terminal 102 in any of the above methods, which will not be repeated here.

[0634] Figure 7C is a schematic diagram of the structure of a network device proposed in an embodiment of the present disclosure. As shown in Figure 7C, the network device 7100 may include: at least one of a transceiver module 7301, a processing module 7302, etc. In some embodiments, the transceiver module is configured to receive one or more of a second indication message, a third indication message, and a fourth indication message sent by a first terminal, wherein the second indication message is used to indicate a second carrier supported by the second terminal, the third indication message is used to indicate a third carrier preferred by the second terminal, and the fourth indication message is used to instruct the second terminal to reject the first indication message, and the first indication message is used to indicate a first carrier used for carrier aggregation, and the first carrier is used by the first terminal to send sidelink data to the second terminal. Optionally, the transceiver module is configured to execute at least one of the communication steps such as sending and / or receiving (for example, step S5101, but not limited thereto) executed by the network device 103 in any of the above methods, which are not described in detail here. Optionally, the processing module is configured to execute at least one of the other steps (for example, step S5102, but not limited thereto) executed by the network device 103 in any of the above methods, which are not described in detail here.

[0635] In some embodiments, the transceiver module may include a transmitting module and / or a receiving module, and the transmitting module and the receiving module may be separate or integrated. Optionally, the transceiver module may be interchangeable with the transceiver.

[0636] In some embodiments, the processing module can be a single module or can include multiple submodules. Optionally, the multiple submodules respectively execute all or part of the steps required to be executed by the processing module. Optionally, the processing module can be interchangeable with the processor.

[0637] Figure 8A is a schematic diagram of the structure of a communication device 8100 proposed in an embodiment of the present disclosure. Communication device 8100 can be a network device (e.g., an access network device, a core network device, etc.), a terminal (e.g., a user equipment, etc.), a chip, a chip system, or a processor that supports a network device to implement any of the above methods, or a chip, a chip system, or a processor that supports a terminal to implement any of the above methods. Communication device 8100 can be used to implement the methods described in the above method embodiments. For details, please refer to the description of the above method embodiments.

[0638] As shown in Figure 8A, the communication device 8100 includes one or more processors 8101. The processor 8101 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute programs, and process program data. The communication device 8100 is used to perform any of the above methods.

[0639] In some embodiments, the communication device 8100 further includes one or more memories 8102 for storing instructions. Optionally, all or part of the memories 8102 may be located outside the communication device 8100.

[0640] In some embodiments, the communication device 8100 further includes one or more transceivers 8103. When the communication device 8100 includes one or more transceivers 8103, the transceiver 8103 performs at least one of the communication steps such as sending and / or receiving in the above method (for example, step S2101, but not limited thereto), and the processor 8101 performs at least one of the other steps (for example, step S2102, but not limited thereto).

[0641] In some embodiments, a transceiver may include a receiver and / or a transmitter. The receiver and transmitter may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, and transceiver circuit may be used interchangeably; the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be used interchangeably; and the terms receiver, receiving unit, receiver, and receiving circuit may be used interchangeably.

[0642] In some embodiments, the communication device 8100 may include one or more interface circuits 8104. Optionally, the interface circuit 8104 is connected to the memory 8102. The interface circuit 8104 may be configured to receive signals from the memory 8102 or other devices, and may be configured to send signals to the memory 8102 or other devices. For example, the interface circuit 8104 may read instructions stored in the memory 8102 and send the instructions to the processor 8101.

[0643] The communication device 8100 described in the above embodiment may be a network device or a terminal, but the scope of the communication device 8100 described in the present disclosure is not limited thereto, and the structure of the communication device 8100 may not be limited by FIG. 8A. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data or programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0644] FIG88B is a schematic diagram of the structure of the chip 8200 proposed in an embodiment of the present disclosure. If the communication device 8200 can be a chip or a chip system, please refer to the schematic diagram of the structure of the chip 8200 shown in FIG8B , but the present disclosure is not limited thereto.

[0645] The chip 8200 includes one or more processors 8201 , and the chip 8200 is configured to execute any of the above methods.

[0646] In some embodiments, the chip 8200 further includes one or more interface circuits 8202. Optionally, the interface circuit 8202 is connected to the memory 8203. The interface circuit 8202 can be used to receive signals from the memory 8203 or other devices, and can be used to send signals to the memory 8203 or other devices. For example, the interface circuit 8202 can read instructions stored in the memory 8203 and send the instructions to the processor 8201.

[0647] In some embodiments, the interface circuit 8202 performs at least one of the communication steps such as sending and / or receiving in the above method (for example, step S2101, but not limited to this), and the processor 8201 performs at least one of the other steps (for example, step S2102, but not limited to this).

[0648] In some embodiments, terms such as interface circuit, interface, transceiver pin, and transceiver may be used interchangeably.

[0649] In some embodiments, the chip 8200 further includes one or more memories 8203 for storing instructions. Alternatively, all or part of the memories 8203 may be outside the chip 8200.

[0650] The present disclosure also proposes a storage medium having instructions stored thereon, which, when executed on the communication device 8100, causes the communication device 8100 to execute any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited thereto, and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto, and may also be a temporary storage medium.

[0651] The present disclosure also provides a program product, which, when executed by the communication device 8100, enables the communication device 8100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0652] The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to perform any one of the above methods.

Claims

1. A method for determining a carrier, characterized in that: The method is performed by a first terminal and includes: determining a first carrier for carrier aggregation; Sending first indication information to a second terminal, where the first indication information is used to indicate the first carrier, and the second terminal is a terminal that establishes a unicast connection with the first terminal; The sidelink data is sent to the second terminal via the first carrier.

2. The method according to claim 1, characterized in that Also includes: Receive one or more of second indication information, third indication information, and fourth indication information sent by the second terminal, where the second indication information is used to indicate a second carrier supported by the second terminal, the third indication information is used to indicate a third carrier that the second terminal preferentially supports, and the fourth indication information is used to instruct the second terminal to reject the first indication information.

3. The method according to claim 2, characterized in that The determining a first carrier for carrier aggregation includes: The first carrier is determined or re-determined according to one or more of the second indication information, the third indication information, and the fourth indication information.

4. The method according to claim 2 or 3, characterized in that Also includes: Send one or more of the second indication information, the third indication information, and the fourth indication information to the network device.

5. The method according to claim 4, characterized in that The first terminal is in a radio resource control RRC connection state and a resource allocation mode of the first terminal is a mode of autonomously selecting sending resources.

6. The method according to claim 5, characterized in that The determining a first carrier for carrier aggregation includes: receiving fifth indication information sent by the network device, where the fifth indication information is used to instruct the network device to determine or re-determine the first carrier; The first carrier is determined according to the fifth indication information.

7. The method according to any one of claims 2 to 6, characterized in that Also includes: Sending request information to the second terminal, where the request information is used to request the second indication information and / or the third indication information.

8. The method according to claim 7, characterized in that The sending the request information to the second terminal includes: The resource allocation mode of the first terminal is configured or reconfigured from a mode of network scheduling sending resources to a mode of autonomously selecting sending resources, and the request information is sent to the second terminal.

9. The method according to any one of claims 2 to 8, characterized in that The supported second carrier includes a carrier that supports sending and / or supports receiving, and the preferred supported third carrier includes a carrier that preferably supports sending and / or preferably supports receiving.

10. The method according to any one of claims 1 to 9, characterized in that The resource allocation method of the first terminal is a method of autonomously selecting sending resources.

11. A method for determining a carrier, characterized in that: The method is performed by the second terminal, and includes: receiving first indication information sent by a first terminal, where the first indication information is used to indicate a first carrier used for carrier aggregation, and the second terminal is a terminal that establishes a unicast connection with the first terminal; The sidelink data sent by the first terminal is received through the first carrier.

12. The method according to claim 11, characterized in that Also includes: One or more of second indication information, third indication information, and fourth indication information are sent to the first terminal, where the second indication information is used to indicate a second carrier supported by the second terminal, the third indication information is used to indicate a third carrier that is preferentially supported by the second terminal, and the fourth indication information is used to instruct the second terminal to reject the first indication information.

13. The method according to claim 12, characterized in that Also includes: Receive request information sent by the first terminal, where the request information is used to request to obtain the second indication information and / or the third indication information.

14. The method according to any one of claims 12 to 13, characterized in that The sending one or more of the second indication information, the third indication information, and the fourth indication information to the first terminal includes one or more of the following: The second indication information changes compared to the previous second indication information, and the second indication information is sent to the first terminal; The third indication information is changed compared with the previous third indication information, and the third indication information is sent to the first terminal.

15. The method according to any one of claims 12 to 14, characterized in that The supported second carrier includes a carrier that supports sending and / or supports receiving, and the preferred supported third carrier includes a carrier that preferably supports sending and / or preferably supports receiving.

16. A method for determining a carrier, characterized in that: Executed by a network device, the method includes: Receive one or more of the second indication information, the third indication information, and the fourth indication information sent by the first terminal, wherein the second indication The information is used to indicate a second carrier supported by the second terminal, the third indication information is used to indicate a third carrier that the second terminal preferably supports, the fourth indication information is used to indicate that the second terminal rejects the first indication information, the first indication information is used to indicate a first carrier used for carrier aggregation, and the first carrier is used by the first terminal to send sidelink data to the second terminal.

17. The method according to claim 16, characterized in that Also includes; Determine or re-determine the first carrier according to one or more of the second indication information, the third indication information, and the fourth indication information; Send fifth indication information to the first terminal, where the fifth indication information is used to indicate the first carrier determined or re-determined by the network device.

18. The method according to any one of claims 16 to 17, characterized in that The supported second carrier includes a carrier that supports sending and / or supports receiving, and the preferred supported third carrier includes a carrier that preferably supports sending and / or preferably supports receiving.

19. A first terminal, characterized in that: include: A processing module, configured to determine a first carrier for carrier aggregation; The transceiver module is used to send first indication information to a second terminal, where the first indication information is used to indicate the first carrier, and the second terminal is a terminal that establishes a unicast connection with the first terminal; and send sidelink data to the second terminal via the first carrier.

20. A second terminal, characterized in that: include: The transceiver module is used to receive first indication information sent by a first terminal, where the first indication information is used to indicate a first carrier used for carrier aggregation, and the second terminal is a terminal that establishes a unicast connection with the first terminal; and receive sidelink data sent by the first terminal through the first carrier.

21. A network device, characterized in that: include: A transceiver module is used to receive one or more of a second indication information, a third indication information, and a fourth indication information sent by a first terminal, wherein the second indication information is used to indicate a second carrier supported by the second terminal, the third indication information is used to indicate a third carrier that is preferentially supported by the second terminal, and the fourth indication information is used to indicate that the second terminal rejects the first indication information; the first indication information is used to indicate a first carrier used for carrier aggregation, and the first carrier is used by the first terminal to send sidelink data to the second terminal.

22. A communication device, characterized in that: include: one or more processors; The communication device is used to execute the method for determining a carrier according to any one of claims 1 to 10.

23. A communication device, characterized in that: include: one or more processors; The communication device is used to execute the method for determining a carrier according to any one of claims 11-15.

24. A communication device, characterized in that: include: one or more processors; The communication device is used to execute the method for determining a carrier according to any one of claims 16 to 18.

25. A communication system, characterized in that: It includes a first terminal, a second terminal, and a network device, wherein: The first terminal is configured to implement the method for determining a carrier according to any one of claims 1 to 10, The second terminal is configured to implement the method for determining a carrier according to any one of claims 11 to 15, The network device is configured to implement the method for determining a carrier according to any one of claims 16 to 18.

26. A storage medium storing instructions, characterized in that: When the instruction is executed on a communication device, the communication device is enabled to perform the method for determining a carrier according to any one of claims 1 to 10, claims 11 to 15, or claims 16 to 18.

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