Communication method, apparatus, storage medium, terminal, and network-side device

Abstract

The present disclosure relates to a communication method, device, storage medium, terminal and network side equipment, and relates to the technical field of communication. The communication method comprises: determining a target unlicensed frequency resource, determining a target Sidelink resource on an unlicensed frequency, and performing Sidelink communication on the target unlicensed frequency resource, and performing Sidelink communication on the target Sidelink resource.

Description

Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to a communication method, apparatus, storage medium, terminal, and network-side equipment. Background Technology

[0002] With the development of wireless communication technology, mobile communication networks are gradually evolving towards 5G NR (New Radio) systems. In 5G NR systems, Sidelink technology is introduced, allowing user equipment (UE) terminals to communicate directly via radio resources. As Sidelink communication becomes more widely used, optimizing related technologies is becoming an increasingly important technical issue. Summary of the Invention

[0003] To overcome the problems existing in related technologies, this disclosure provides a communication method, apparatus, storage medium, terminal, and network-side device.

[0004] According to a first aspect of the present disclosure, a communication method is provided, applied to a terminal, the method comprising:

[0005] Identify the target Sidelink resource on the unlicensed frequency;

[0006] Sidelink communication is performed on the target Sidelink resource.

[0007] Optionally, determining the target Sidelink resource on the unlicensed frequency includes:

[0008] Send a first resource request to the network-side device, wherein the first resource request is used to request the network-side device to allocate Sidelink resources on an unlicensed frequency for the terminal;

[0009] The Sidelink resource allocated by the network-side device is determined as the target Sidelink resource.

[0010] Optionally, the first resource request includes at least one of the following:

[0011] First-purpose terminal identifier;

[0012] First logical channel identifier;

[0013] First unauthorized frequency identifier;

[0014] Wherein, the first destination terminal identifier is used to indicate that the data transmission frequency of the destination terminal is a Sidelink resource on an unlicensed frequency; the first logical channel identifier is used to indicate that the data transmission frequency of the logical channel is a Sidelink resource on an unlicensed frequency; and the first unlicensed frequency identifier is used to indicate that the Sidelink resource requested by the terminal is on an unlicensed frequency.

[0015] Optionally, determining the target Sidelink resource on the unlicensed frequency includes:

[0016] The target Sidelink resource is determined from a first resource pool issued by the network-side device, wherein the first resource pool includes at least one candidate Sidelink resource on an unlicensed frequency.

[0017] Optionally, before determining the target Sidelink resource from the first resource pool issued by the network-side device, the method further includes:

[0018] The first resource pool is obtained based on the system message sent by the network-side device.

[0019] Optionally, determining the target Sidelink resource on the unlicensed frequency includes:

[0020] The target Sidelink resource is determined from a second resource pool pre-configured on the terminal, wherein the second resource pool includes at least one candidate Sidelink resource on an unlicensed frequency.

[0021] Optionally, determining the target Sidelink resource on the unlicensed frequency includes:

[0022] Send a second resource request to the network-side device, wherein the second resource request is used to request the network-side device to allocate Sidelink resources for the terminal on a specified unlicensed frequency;

[0023] The Sidelink resource allocated by the network-side device on the specified unlicensed frequency is determined as the target Sidelink resource.

[0024] Optionally, before sending the second resource request to the network-side device, the method further includes:

[0025] Receive frequency configuration information sent by the network-side device;

[0026] The specified unlicensed frequency is determined in the frequency configuration information.

[0027] Optionally, the second resource request includes at least one of the following:

[0028] Secondary terminal identifier;

[0029] Second logical channel identifier;

[0030] Transmission frequency identifier;

[0031] Second unauthorized frequency identifier;

[0032] Wherein, the second destination terminal identifier is used to indicate that the data transmission frequency of the destination terminal is the Sidelink resource on the specified unlicensed frequency;

[0033] The second logical channel identifier is used to indicate that the data transmission frequency of the logical channel is the specified unlicensed frequency;

[0034] The transmission frequency identifier is used to indicate that at least one unlicensed frequency in the frequency configuration information is the designated unlicensed frequency;

[0035] The second unlicensed frequency identifier is used to indicate, when the transmission frequency of the data to be transmitted is an unlicensed frequency, that the Sidelink resource requested by the terminal is on the specified unlicensed frequency.

[0036] Optionally, when the frequency configuration information includes multiple frequency lists, the transmit frequency identifier includes:

[0037] A first identifier used to indicate the order of the plurality of frequency lists.

[0038] Optionally, if the frequency configuration information includes a multiple frequency list, and if the second resource request includes the second unlicensed frequency identifier, the transmission frequency identifier includes:

[0039] A second identifier is used to indicate a first target frequency list, wherein the first target frequency list is a frequency list in the plurality of frequency lists that carries the unauthorized frequency corresponding to the second unauthorized frequency identifier;

[0040] or,

[0041] If the frequency configuration information includes multiple frequency lists, and the second resource request does not carry the second unauthorized frequency identifier, the transmitted frequency identifier includes:

[0042] A third identifier is used to indicate a second target frequency list, which is a list of frequencies carrying licensed frequencies among the plurality of frequency lists.

[0043] Optionally, determining the target Sidelink resource on the unlicensed frequency includes:

[0044] The target Sidelink resource is determined based on the frequency configuration information issued by the network-side device and the third resource pool, wherein the third resource pool includes at least one candidate Sidelink resource on an unlicensed frequency.

[0045] Optionally, before determining the target Sidelink resource based on the frequency configuration information issued by the network-side device and the third resource pool, the method further includes:

[0046] The third resource pool is obtained based on the system message sent by the network-side device.

[0047] Optionally, determining the target Sidelink resource on the unlicensed frequency includes:

[0048] If the unlicensed frequency that the terminal wants to request is not in the frequency configuration information issued by the network-side device, the target Sidelink resource is determined from the pre-configured fourth resource pool, wherein the fourth resource pool includes at least one candidate Sidelink resource on the unlicensed frequency.

[0049] Optionally, the frequency configuration information includes at least one of the following:

[0050] First frequency list;

[0051] Second frequency list;

[0052] CAPC configuration information;

[0053] LBT configuration information;

[0054] The first frequency list includes licensed frequencies and unlicensed frequencies, and the unlicensed frequencies are marked with an unlicensed frequency identifier in the first frequency list;

[0055] The second frequency list includes unlicensed frequencies;

[0056] The CAPC configuration information includes the channel access priority of the Sidelink logical channel and / or the mapping relationship between the QoS identifier and the channel access priority.

[0057] The LBT configuration information includes the maximum number of LBT failures that can trigger a continuous LBT failure event.

[0058] Optionally, the unlicensed frequency identifier includes CAPC configuration information and / or LBT configuration information.

[0059] Optionally, the frequency configuration information is obtained through at least one of the following methods:

[0060] The frequency configuration information is obtained based on the system messages sent by the network-side devices;

[0061] The frequency configuration information is obtained based on the RRC reconfiguration message sent by the network-side device;

[0062] The frequency configuration information is obtained based on the RRC reconfiguration message sent by the relay terminal, wherein the RRC reconfiguration message is sent by the network-side device to the relay terminal.

[0063] According to a second aspect of the present disclosure, a communication method is provided, applied to a network-side device, the method comprising:

[0064] Frequency configuration information is sent to the terminal, wherein the frequency configuration information is used to enable the terminal to determine the target Sidelink resource on an unlicensed frequency for Sidelink communication.

[0065] Optionally, the method further includes:

[0066] The first resource request sent by the receiving terminal;

[0067] In response to the first resource request, a Sidelink resource on an unlicensed frequency is allocated to the terminal, so that the terminal identifies the allocated Sidelink resource as the target Sidelink resource.

[0068] Optionally, the first resource request includes at least one of the following:

[0069] First-purpose terminal identifier;

[0070] First logical channel identifier;

[0071] First unauthorized frequency identifier;

[0072] Wherein, the first destination terminal identifier is used to indicate that the data transmission frequency of the destination terminal is a Sidelink resource on an unlicensed frequency; the first logical channel identifier is used to indicate that the data transmission frequency of the logical channel is a Sidelink resource on an unlicensed frequency; and the first unlicensed frequency identifier is used to indicate that the Sidelink resource requested by the terminal is on an unlicensed frequency.

[0073] Optionally, the method further includes:

[0074] A first resource pool is sent to the terminal, wherein the first resource pool is used by the terminal to determine target Sidelink resources on unlicensed frequencies from the first resource pool, and the first resource pool includes at least one candidate Sidelink resource on an unlicensed frequency.

[0075] Optionally, sending the first resource pool to the terminal includes:

[0076] The first resource pool is sent to the terminal via system message.

[0077] Optionally, the method further includes:

[0078] The system receives a second resource request sent by the terminal, wherein the second resource request is used to request the network-side device to allocate Sidelink resources for the terminal on a specified unlicensed frequency, and the specified unlicensed frequency is determined according to the frequency configuration information.

[0079] In response to the second resource request, a Sidelink resource on the specified unlicensed frequency is allocated to the terminal, so that the terminal uses the allocated Sidelink resource as the target Sidelink resource.

[0080] Optionally, the second resource request includes at least one of the following:

[0081] Secondary terminal identifier;

[0082] Second logical channel identifier;

[0083] Transmission frequency identifier;

[0084] Second unauthorized frequency identifier;

[0085] Wherein, the second destination terminal identifier is used to indicate that the data transmission frequency of the destination terminal is the Sidelink resource on the specified unlicensed frequency;

[0086] The second logical channel identifier is used to indicate that the data transmission frequency of the logical channel is the specified unlicensed frequency;

[0087] The transmission frequency identifier is used to indicate that at least one unlicensed frequency in the frequency configuration information is the designated unlicensed frequency;

[0088] The second unlicensed frequency identifier is used to indicate, when the transmission frequency of the data to be transmitted is an unlicensed frequency, that the Sidelink resource requested by the terminal is on the specified unlicensed frequency.

[0089] Optionally, when the frequency configuration information includes multiple frequency lists, the transmit frequency identifier includes:

[0090] A first identifier used to indicate the order of the plurality of frequency lists.

[0091] Optionally, if the frequency configuration information includes a multiple frequency list, and if the second resource request includes the second unlicensed frequency identifier, the transmission frequency identifier includes:

[0092] A second identifier is used to indicate a first target frequency list, wherein the first target frequency list is a frequency list in the plurality of frequency lists that carries unlicensed frequency resources corresponding to the second unlicensed frequency identifier;

[0093] or,

[0094] If the frequency configuration information includes multiple frequency lists, and the second resource request does not carry the second unauthorized frequency identifier, the transmitted frequency identifier includes:

[0095] A third identifier is used to indicate a second target frequency list, which is a list of frequencies carrying licensed frequencies among the plurality of frequency lists.

[0096] Optionally, the method further includes:

[0097] A third resource pool is sent to the terminal, wherein the third resource pool is used by the terminal to determine the target Sidelink resource based on the frequency configuration information and the third resource pool, wherein the third resource pool includes at least one candidate Sidelink resource on an unlicensed frequency.

[0098] Optionally, sending the third resource pool to the terminal includes:

[0099] The third resource pool is sent to the terminal via system message.

[0100] Optionally, the frequency configuration information includes at least one of the following:

[0101] First frequency list;

[0102] Second frequency list;

[0103] CAPC configuration information;

[0104] LBT configuration information;

[0105] The first frequency list includes licensed frequencies and unlicensed frequencies, and the unlicensed frequencies are marked with an unlicensed frequency identifier in the first frequency list;

[0106] The second frequency list includes unlicensed frequencies;

[0107] The CAPC configuration information includes the channel access priority of the Sidelink logical channel and / or the mapping relationship between the QoS identifier and the channel access priority.

[0108] The LBT configuration information includes the maximum number of LBT failures that can trigger a continuous LBT failure event.

[0109] Optionally, the unlicensed frequency identifier includes CAPC configuration information and / or LBT configuration information.

[0110] Optionally, sending frequency configuration information to the terminal includes:

[0111] The frequency configuration information is sent to the terminal via system messages; and / or,

[0112] The frequency configuration information is sent to the terminal via an RRC reconfiguration message; and / or

[0113] The frequency configuration information is sent to the terminal via an RRC reconfiguration message sent to the relay terminal, wherein the RRC reconfiguration message is forwarded to the terminal by the relay terminal.

[0114] According to a third aspect of the present disclosure, a communication device is provided for use in a terminal, the device comprising:

[0115] The module is configured to determine target Sidelink resources on unlicensed frequencies;

[0116] The communication module is configured to perform Sidelink communication on the target Sidelink resource.

[0117] According to a fourth aspect of the present disclosure, a communication apparatus is provided, applied to a network-side device, the apparatus comprising:

[0118] The sending module is configured to send frequency configuration information to the terminal, wherein the frequency configuration information is used to enable the terminal to determine the target Sidelink resource on an unlicensed frequency for Sidelink communication.

[0119] According to a fifth aspect of the present disclosure, a terminal is provided, comprising:

[0120] First processor;

[0121] A first memory for storing instructions executable by a first processor;

[0122] The first processor is configured to execute the executable instructions to implement the communication method described in the first aspect.

[0123] According to a sixth aspect of the present disclosure, a network-side device is provided, comprising:

[0124] Second processor;

[0125] A second memory used to store instructions executable by a second processor;

[0126] The second processor is configured to execute the executable instructions to implement the communication method described in the second aspect.

[0127] According to a seventh aspect of the present disclosure, a computer-readable storage medium is provided that stores computer program instructions thereon, which, when executed by a processor, implement the steps of the communication method provided in the first or second aspect of the present disclosure.

[0128] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects: by determining the target unlicensed frequency resource for Sidelink communication and performing Sidelink communication on the target unlicensed frequency resource, the terminal can expand the available frequency resources for Sidelink to provide a high-bandwidth, low-latency Sidelink communication link.

[0129] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0130] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0131] Figure 1 This is a structural diagram of a network system illustrating a communication method according to some embodiments.

[0132] Figure 2 This is a flowchart illustrating a communication method according to some embodiments.

[0133] Figure 3 This is a flowchart illustrating a communication method according to some other embodiments.

[0134] Figure 4 This is a communication timing diagram illustrating a communication method according to some embodiments.

[0135] Figure 5 This is a flowchart illustrating a communication method according to some embodiments.

[0136] Figure 6 This is a flowchart illustrating a communication method according to some other embodiments.

[0137] Figure 7 This is a flowchart illustrating a communication method according to some embodiments.

[0138] Figure 8This is a communication timing diagram illustrating a communication method according to some embodiments.

[0139] Figure 9 This is a flowchart illustrating a communication method according to some other embodiments.

[0140] Figure 10 This is a flowchart illustrating a communication method according to some embodiments.

[0141] Figure 11 This is a flowchart illustrating a communication method according to some other embodiments.

[0142] Figure 12 This is a flowchart illustrating a communication method according to some embodiments.

[0143] Figure 13 This is a communication timing diagram illustrating a communication method according to some embodiments.

[0144] Figure 14 This is a flowchart illustrating a communication method according to some other embodiments.

[0145] Figure 15 This is a flowchart illustrating a communication method according to some embodiments.

[0146] Figure 16 This is a flowchart illustrating a communication method according to some embodiments.

[0147] Figure 17 This is a flowchart illustrating a communication method according to some embodiments.

[0148] Figure 18 This is a flowchart illustrating a communication method according to some embodiments.

[0149] Figure 19 This is a flowchart illustrating a communication method according to some other embodiments.

[0150] Figure 20 This is a flowchart illustrating a communication method according to some embodiments.

[0151] Figure 21 This is a flowchart illustrating a communication method according to some other embodiments.

[0152] Figure 22 This is a flowchart illustrating a communication method according to some embodiments.

[0153] Figure 23 This is a flowchart illustrating a communication method according to some embodiments.

[0154] Figure 24This is a flowchart illustrating a communication method according to some embodiments.

[0155] Figure 25 This is a flowchart illustrating a communication method according to some embodiments.

[0156] Figure 26 This is a flowchart illustrating a communication method according to some embodiments.

[0157] Figure 27 This is a block diagram illustrating a communication device according to an exemplary embodiment.

[0158] Figure 28 This is a block diagram illustrating a communication device according to an exemplary embodiment.

[0159] Figure 29 This is a block diagram illustrating a terminal according to an exemplary embodiment.

[0160] Figure 30 This is a block diagram illustrating a network-side device according to an exemplary embodiment. Detailed Implementation

[0161] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0162] In related technologies, network-side devices carry a frequency list in system messages (SIB12), where each element represents the Sidelink resource configuration for the corresponding frequency. The Sidelink resource configuration includes the frequency location, the Sidelink transmit resource pool, and the Sidelink receive resource pool. However, this frequency list only contains frequency resources on licensed frequencies.

[0163] To expand the available frequency resources for Sidelink, this disclosure proposes a communication method in which a terminal determines a target Sidelink resource on an unlicensed frequency and performs Sidelink communication on that target Sidelink resource.

[0164] Figure 1 This is a structural diagram of a network system illustrating a communication method according to some embodiments. For example... Figure 1As shown, the system includes a first terminal 11, a second terminal 12, and a network-side device 13. The first terminal 11 and the second terminal 12 can communicate via a PC5 interface using Sidelink. The network-side device 13 can communicate with the terminals (including the first terminal 11 and the second terminal 12) via an air interface using uplink and downlink.

[0165] The first terminal 11 and the second terminal 12 are user equipment (UE) or other terminal-side devices, such as mobile phones, tablet personal computers, laptop computers, personal digital assistants (PDAs), mobile internet devices (MIDs), wearable devices, smart cars, in-vehicle devices, or robots. It is worth noting that this disclosure does not limit the specific type of terminal.

[0166] Network-side equipment can be a base station, which is a device deployed in the access network to provide wireless communication functions for terminals. This base station can be the base station of the terminal's serving cell or a base station of a neighboring cell. Base stations can include various forms of macro base stations, micro base stations, relay stations, access points, transmission reception points (TRPs), etc. In systems using different wireless access technologies, the name of the equipment with base station functions may differ; in 5G New Radio (NR) systems, it is called gNodeB or gNB. As communication technologies evolve, the term "base station" may change. Network-side equipment can also be a Location Management Function (LMF).

[0167] It is worth noting that, in Figure 1 In the network system shown, the first terminal 11 and the second terminal 12 communicate via a direct Sidelink link. In other embodiments, the first terminal 11 and the second terminal 12 may also communicate via an indirect Sidelink link. That is, the first terminal 11 and the second terminal 12 communicate through at least one relay terminal.

[0168] Figure 2 This is a flowchart illustrating a communication method according to some embodiments. For example... Figure 2 As shown, this communication method can be used in a terminal and includes the following steps.

[0169] In step 210, the target Sidelink resource on the unlicensed frequency is determined.

[0170] Here, sidelink resources may include sidelink transmit resources and / or sidelink receive resources. The target sidelink resource may be at least one sidelink transmit resource and / or sidelink receive resource on an unlicensed frequency.

[0171] The target sidelink resource can be a sidelink resource on an unlicensed frequency that the terminal can use, and / or a sidelink resource on an unlicensed frequency that the network-side device can support. Specifically, when the terminal's bandwidth on a licensed frequency is limited, the terminal can identify at least one sidelink resource on an unlicensed frequency as the target sidelink resource.

[0172] It is worth noting that the target Sidelink resource on unlicensed frequencies can be requested by the terminal from the network-side device, and / or determined by the terminal itself.

[0173] In step 220, Sidelink communication is performed on the target Sidelink resource.

[0174] Here, the target Sidelink resource is a resource used for Sidelink communication, that is, the target Sidelink resource is used for Sidelink sending resources and / or Sidelink receiving resources for Sidelink communication.

[0175] Based on the target sidelink resource, a terminal can use this target sidelink resource to communicate with a destination terminal via sidelink. Sidelink communication can be conducted via a direct sidelink link or via an indirect sidelink link. Direct sidelink communication refers to two terminals communicating directly without a relay terminal, while indirect sidelink communication refers to two terminals communicating via at least one relay terminal.

[0176] Therefore, by identifying a target Sidelink resource on an unlicensed frequency and conducting Sidelink communication on that target Sidelink resource, the terminal can expand the available frequency resources for Sidelink to provide a high-bandwidth, low-latency Sidelink communication link.

[0177] Figure 3This is a flowchart illustrating a communication method according to other embodiments. For example... Figure 3 As shown, this communication method can be used in a terminal and includes the following steps.

[0178] In step 310, a first resource request is sent to the network-side device, wherein the first resource request is used to request the network-side device to allocate Sidelink resources on an unlicensed frequency for the terminal.

[0179] Here, the terminal can send a first resource request to the network-side device, which requests the network-side device to allocate Sidelink resources on an unlicensed frequency for the terminal. A description of Sidelink resources can be found in [reference needed]. Figure 2 The description of step 210 in the illustrated embodiment will not be repeated here.

[0180] In some embodiments, the first resource request can be carried through a SidelinkUEInformation message.

[0181] When the terminal is in a connected state, the terminal can send a first resource request to the network-side device. In response to the first resource request, the network-side device allocates Sidelink resources on an unlicensed frequency to the terminal according to a first preset rule.

[0182] It is worth noting that the network-side device's allocation of sidelink resources on unlicensed frequencies to the terminal according to the first preset rule can mean that the network-side device determines at least one unlicensed frequency from the unlicensed frequencies it can support, determines at least one sidelink resource within that at least one unlicensed frequency, and allocates that at least one sidelink resource to the terminal. The allocation of sidelink resources on unlicensed frequencies by the network-side device can be dynamic; that is, it can dynamically select at least one sidelink resource to allocate to the terminal based on the sidelink resources on unlicensed frequencies that the network-side device can support.

[0183] In step 320, the Sidelink resource allocated by the network-side device is determined as the target Sidelink resource.

[0184] Here, in response to the Sidelink resource allocation information sent by the network-side device, the terminal identifies the Sidelink resource allocated by the network-side device on an unlicensed frequency as the target Sidelink resource. This Sidelink resource allocation information carries the Sidelink resource allocated by the network-side device on an unlicensed frequency.

[0185] In step 330, Sidelink communication is performed on the target Sidelink resource.

[0186] Here, the target Sidelink resource is a resource used for Sidelink communication, that is, the target Sidelink resource is used for Sidelink sending resources and / or Sidelink receiving resources for Sidelink communication.

[0187] Based on the target sidelink resource, a terminal can use this target sidelink resource to communicate with a destination terminal via sidelink. Sidelink communication can be conducted via a direct sidelink link or via an indirect sidelink link. Direct sidelink communication refers to two terminals communicating directly without a relay terminal, while indirect sidelink communication refers to two terminals communicating via at least one relay terminal.

[0188] Figure 4 This is a communication timing diagram illustrating a communication method according to some embodiments. For example... Figure 4 As shown, the terminal sends a first resource request to the network-side device. In response to the first resource request, the network-side device allocates sidelink resources on an unlicensed frequency to the terminal. Specifically, in response to the first resource request, the network-side device may determine at least one unlicensed frequency from its supported unlicensed frequencies and identify at least one sidelink resource within that frequency. The network-side device then sends sidelink resource allocation information to the terminal, which receives this information and obtains the target sidelink resource. The sidelink resource allocation information carries the sidelink resources allocated by the network-side device on the unlicensed frequency.

[0189] Therefore, by sending a first resource request to the network-side device, the terminal can cause the network-side device to respond to the first resource request and allocate sidelink resources on an unlicensed frequency to the terminal. The terminal will then identify the sidelink resources allocated by the network-side device on the unlicensed frequency as the target sidelink resources for sidelink communication, and perform sidelink communication on the target sidelink resources. This can expand the available frequency resources for sidelink communication and provide a high-bandwidth, low-latency sidelink communication link.

[0190] In some embodiments, the first resource request may include at least one of the following:

[0191] First destination terminal identifier; first logical channel identifier; first unlicensed frequency identifier.

[0192] Wherein, the first destination terminal identifier is used to indicate that the data transmission frequency of the destination terminal is a Sidelink resource on an unlicensed frequency; the first logical channel identifier is used to indicate that the data transmission frequency of the logical channel is a Sidelink resource on an unlicensed frequency; and the first unlicensed frequency identifier is used to indicate that the Sidelink resource requested by the terminal is on an unlicensed frequency.

[0193] It is worth noting that the destination terminal refers to the peer terminal that communicates with the terminal via Sidelink. For example... Figure 1 As shown, the second terminal 12 is the destination terminal of the first terminal 11. By carrying a first target terminal identifier in the first resource request, it can be indicated that the data transmission frequency used by the destination terminal in Sidelink communication is a Sidelink resource on an unlicensed frequency. By carrying a first logical channel identifier in the first resource request, it can be indicated that the data transmission frequency of the logical channel in Sidelink communication is a Sidelink resource on an unlicensed frequency. The first unlicensed frequency identifier is used to indicate that the Sidelink resource requested by the terminal from the network-side device is on an unlicensed frequency. By carrying the first unlicensed identifier in the first resource request, the network-side device can know that the terminal is about to request a Sidelink resource on an unlicensed frequency, and the network-side device allocates the Sidelink resource on the unlicensed frequency to the terminal according to the first unlicensed identifier.

[0194] Figure 5 This is a flowchart illustrating a communication method according to some embodiments. For example... Figure 5 As shown, this communication method can be used in a terminal and includes the following steps.

[0195] Step 510: Determine whether the network-side device sends frequency configuration information to the terminal;

[0196] Step 520: If the network-side device has sent frequency configuration information, determine whether the terminal is in a connected state.

[0197] Step 530: While the terminal is in a connected state, send a first resource request to the network-side device;

[0198] Step 540: Determine the Sidelink resources allocated by the network-side device on unlicensed frequencies as the target Sidelink resources;

[0199] Step 550: Perform Sidelink communication on the target Sidelink resource.

[0200] Here, in step 510, the terminal can request the network-side device to send frequency configuration information to the terminal, or receive frequency configuration information broadcast by the network-side device. The terminal's determination of whether the network-side device has sent frequency configuration information can be based on whether the terminal has received the frequency configuration information. When the terminal receives the frequency configuration information, it is determined that the network-side device has sent the frequency configuration information; when the terminal does not receive the frequency configuration information, it is determined that the network-side device has not sent the frequency configuration information.

[0201] The frequency configuration information is used to enable the terminal to determine the target Sidelink resource on the unlicensed frequency for Sidelink communication.

[0202] In some embodiments, the frequency configuration information can be obtained from system messages sent by the network-side device. The frequency configuration information is carried in the system messages sent by the network-side device.

[0203] In some embodiments, the frequency configuration information can be obtained from the RRC reconfiguration message sent by the network-side device. The frequency configuration information is carried in the RRC reconfiguration message sent by the network-side device.

[0204] In some embodiments, the frequency configuration information can be obtained based on an RRC reconfiguration message sent by the relay terminal, wherein the RRC reconfiguration message is sent by the network-side device to the relay terminal. It should be understood that the relay terminal forwards the RRC reconfiguration message sent by the network-side device to the terminal. The frequency configuration information is carried in this RRC message. The RRC reconfiguration message may be a Sidelink RRC reconfiguration message.

[0205] The frequency configuration information is used by the terminal to request unlicensed frequencies. In some embodiments, the frequency configuration information includes at least one of the following:

[0206] First frequency list; Second frequency list; CAPC configuration information; LBT configuration information.

[0207] The first frequency list includes licensed frequencies and unlicensed frequencies, with unlicensed frequencies marked by an unlicensed frequency identifier in the first frequency list. The second frequency list includes unlicensed frequencies. The CAPC configuration information includes the channel access priority and / or the mapping relationship between the QoS identifier and the channel access priority of the Sidelink logical channel. The LBT configuration information includes the maximum number of LBT failures that can trigger a continuous LBT failure event.

[0208] Here, the first frequency list may include licensed and unlicensed frequencies that the network-side devices can support. Unlicensed frequencies in the first frequency list can be marked with an unlicensed frequency identifier to distinguish them from licensed frequencies. For example, unlicensed frequencies in the first frequency list can be marked with an unlicensed frequency identifier similar to "unlicensed".

[0209] Of course, in other embodiments, the unlicensed frequency identifier can be CAPC configuration information and / or LBT configuration information. That is, in the first frequency list, the unlicensed frequencies in the first frequency list are marked by the CAPC configuration information and / or LBT configuration information corresponding to the unlicensed frequency.

[0210] It should be understood that both licensed and unlicensed frequencies in the first frequency list can be frequency resources used for Sidelink communication. These frequency resources may include at least one of the following: the Sidelink destination address of the destination terminal, the transmission mode, QoS (Quality of Service), the data transmission frequency, and the data reception frequency. The transmission mode may include unicast, multicast, and broadcast.

[0211] The second frequency list includes unlicensed frequencies that network-side devices can support. These unlicensed frequencies can all be used for Sidelink communication and may include at least one of the following: the destination address of the destination terminal's Sidelink, the transmission method, QoS (Quality of Service), the data transmission frequency, and the data reception frequency. The transmission method may include unicast, multicast, and broadcast.

[0212] CAPC (Channel Access Priority Class) configuration information includes the channel access priority of the Sidelink logical channel and / or the mapping relationship between the QoS identifier and the channel access priority. The QoS identifier indicates the corresponding QoS standard value. For example, in 5G communication technology, the QoS identifier can be 5QI, and the mapping relationship can be the mapping relationship between 5QI and CAPC.

[0213] It is worth noting that when a terminal accesses a channel on an unlicensed frequency, it needs to determine whether access is permitted based on the channel access priority, which is determined by the priority of the logical channel from which the data to be transmitted is located. Therefore, through CAPC configuration information, the mapping relationship between the channel access priority and / or QoS identifier of the Sidelink logical channel and the channel access priority can be obtained, thus enabling the determination of the corresponding channel access priority during channel access.

[0214] LBT (Listen Before Talk) configuration information includes the maximum number of LBT failures that can trigger a continuous LBT failure event. Specifically, when a terminal performs sidelink transmissions on unlicensed frequencies, the LBT mechanism is required to avoid interference and ensure fairness among different terminals. After a successful LBT, the terminal uses unlicensed frequencies for sidelink transmissions. Through the LBT configuration information, the terminal can perform the LBT mechanism on unlicensed frequencies.

[0215] In other embodiments, the unlicensed frequency identifiers in the first frequency list may include CAPC configuration information and / or LBT configuration information. That is, unlicensed frequencies are marked in the first frequency list using CAPC configuration information and / or LBT configuration information.

[0216] It is worth noting that in step 520, when the terminal receives frequency configuration information, it indicates that the network-side device supports allocating Sidelink resources on unlicensed frequencies for Sidelink communication to the terminal. When the terminal does not receive frequency configuration information, it indicates that the network-side device does not support allocating Sidelink resources on unlicensed frequencies for Sidelink communication to the terminal.

[0217] In step 520, if the network-side device has already sent frequency configuration information, the terminal further determines whether it is in a connected state. In step 530, if the terminal is in a connected state, the terminal sends a first resource request to the network-side device, requesting the network-side device to allocate Sidelink resources on an unlicensed frequency for the terminal. This causes the network-side device to respond to the first resource request and allocate Sidelink resources on an unlicensed frequency for the terminal according to a first preset rule. In some embodiments, the first resource request can be carried through a SidelinkUEInformation message. For details on how the network-side device allocates Sidelink resources on an unlicensed frequency for the terminal according to the first preset rule, please refer to [reference needed]. Figure 3 The relevant descriptions of step 310 in the illustrated embodiment will not be repeated here.

[0218] In step 540, in response to the Sidelink resource allocation information sent by the network-side device, the terminal determines the unlicensed frequency resource allocated by the network-side device as the target unlicensed frequency resource. This allocation information is sent by the network-side device to allocate unlicensed frequency resources to the terminal.

[0219] In step 550, in response to the Sidelink resource allocation information sent by the network-side device, the terminal determines the Sidelink resource allocated by the network-side device on an unlicensed frequency as the target Sidelink resource. The Sidelink resource allocation information carries the Sidelink resource allocated by the network-side device on an unlicensed frequency.

[0220] Based on the target sidelink resource, a terminal can use this target sidelink resource to communicate with a destination terminal via sidelink. Sidelink communication can be conducted via a direct sidelink link or via an indirect sidelink link. Direct sidelink communication refers to two terminals communicating directly without a relay terminal, while indirect sidelink communication refers to two terminals communicating via at least one relay terminal.

[0221] Therefore, if the terminal is in a connected state and the network-side device has already sent frequency configuration information to the terminal, the terminal sends a first resource request to the network-side device. In response to the first resource request, the network-side device allocates Sidelink resources on unlicensed frequencies to the terminal. The terminal determines the Sidelink resources allocated by the network-side device on unlicensed frequencies as target Sidelink resources for Sidelink communication. Sidelink communication can be performed on these target Sidelink resources, which can expand the available frequency resources for Sidelink to provide high-bandwidth, low-latency Sidelink communication links.

[0222] Figure 6 This is a flowchart illustrating a communication method according to other embodiments. For example... Figure 6 As shown, this communication method can be used in a terminal and includes the following steps.

[0223] In step 610, a target Sidelink resource is determined from the first resource pool issued by the network-side device, wherein the first resource pool includes at least one candidate Sidelink resource on an unlicensed frequency.

[0224] Here, the first resource pool is sent from the network-side device to the terminal, and the first resource pool includes at least one candidate sidelink resource on an unlicensed frequency. The at least one sidelink resource included in the first resource pool can be a sidelink resource on an unlicensed frequency that the network-side device can support.

[0225] The terminal can select at least one Sidelink resource from the first resource pool as the target Sidelink resource according to the second preset rule.

[0226] It is worth noting that when the terminal is in an idle or inactive state, since there is no communication between the terminal and the network-side device, the terminal can determine the target Sidelink resource on the unlicensed frequency from the first resource pool.

[0227] In step 620, Sidelink communication is performed on the target Sidelink resource.

[0228] Here, the target Sidelink resource is a resource used for Sidelink communication, that is, the target Sidelink resource is used for Sidelink sending resources and / or Sidelink receiving resources for Sidelink communication.

[0229] Based on the target sidelink resource, a terminal can use this target sidelink resource to communicate with a destination terminal via sidelink. Sidelink communication can be conducted via a direct sidelink link or via an indirect sidelink link. Direct sidelink communication refers to two terminals communicating directly without a relay terminal, while indirect sidelink communication refers to two terminals communicating via at least one relay terminal.

[0230] Therefore, by identifying a target Sidelink resource for Sidelink communication in the first resource pool, the terminal can perform Sidelink communication on that target Sidelink resource. This not only expands the available frequency resources for Sidelink to provide a high-bandwidth, low-latency Sidelink communication link, but also allows the terminal to request the target Sidelink resource on an unlicensed frequency even when it is in an idle or inactive state.

[0231] Figure 7 This is a flowchart illustrating a communication method according to some embodiments. For example... Figure 7 As shown, this communication method can be used in a terminal and includes the following steps.

[0232] In step 710, the first resource pool is obtained based on the system message sent by the network-side device.

[0233] Here, the terminal can receive a system message sent by the network-side device, which carries a first resource pool. The terminal obtains the first resource pool based on the system message. The first resource pool includes at least one candidate Sidelink resource on an unlicensed frequency.

[0234] It should be understood that this system message is not necessarily sent by the network-side device when the terminal requests Sidelink resources. The system message can be broadcast from the network-side device to the terminal during communication between the terminal and the network-side device. That is, when the terminal communicates with the network-side device, the network-side device broadcasts the latest first resource pool to the terminal. The first resource pool is also stored on the terminal when it is in an idle or inactive state.

[0235] In step 720, the target Sidelink resource is determined from the first resource pool issued by the network-side device.

[0236] Here, the terminal can select at least one Sidelink resource from the first resource pool as the target Sidelink resource according to the second preset rule.

[0237] It is worth noting that when the terminal is in an idle or inactive state, since there is no communication between the terminal and the network-side device, the terminal can determine the target Sidelink resource on the unlicensed frequency from the first resource pool. Of course, when the terminal is in a connected state, it can also determine the target Sidelink resource from the first resource pool.

[0238] In step 730, Sidelink communication is performed on the target Sidelink resource.

[0239] Here, the target Sidelink resource is a resource used for Sidelink communication, that is, the target Sidelink resource is used for Sidelink sending resources and / or Sidelink receiving resources for Sidelink communication.

[0240] Based on the target sidelink resource, a terminal can use this target sidelink resource to communicate with a destination terminal via sidelink. Sidelink communication can be conducted via a direct sidelink link or via an indirect sidelink link. Direct sidelink communication refers to two terminals communicating directly without a relay terminal, while indirect sidelink communication refers to two terminals communicating via at least one relay terminal.

[0241] Figure 8 This is a communication timing diagram illustrating a communication method according to some embodiments. For example... Figure 8 As shown, when the terminal communicates with the network-side device, it receives a system message sent by the network-side device. This system message carries a first resource pool. When the terminal is in an idle state, an inactive state, or a connected state, it determines the target Sidelink resource on an unlicensed frequency from the first resource pool.

[0242] Therefore, the terminal determines the target Sidelink resource for Sidelink communication from the first resource pool issued by the network-side device, and performs Sidelink communication on the target Sidelink resource. This not only expands the available frequency resources for Sidelink to provide a high-bandwidth, low-latency Sidelink communication link, but also allows the terminal to request the target Sidelink resource even when it is in an idle or inactive state.

[0243] Figure 9 This is a flowchart illustrating a communication method according to other embodiments. For example... Figure 9 As shown, this communication method can be used in a terminal and includes the following steps.

[0244] Step 910: Determine whether the network-side device sends frequency configuration information to the terminal;

[0245] Step 920: If the network-side device has sent frequency configuration information, determine whether the terminal is in a connected state.

[0246] Step 930: When the terminal is in an idle or inactive state, determine the target Sidelink resource from the first resource pool issued by the network-side device, wherein the first resource pool includes at least one candidate Sidelink resource on an unlicensed frequency.

[0247] Step 940: Perform Sidelink communication on the target Sidelink resource.

[0248] Here, the terminal can request the network-side device to send frequency configuration information to the terminal, or receive frequency configuration information broadcast by the network-side device. The terminal can determine whether the network-side device has sent frequency configuration information to the terminal based on whether the terminal has received the frequency configuration information. When the terminal receives the frequency configuration information, it is determined that the network-side device has sent the frequency configuration information; when the terminal does not receive the frequency configuration information, it is determined that the network-side device has not sent the frequency configuration information.

[0249] The frequency configuration information is used to enable the terminal to determine the target Sidelink resource on the unlicensed frequency for Sidelink communication.

[0250] In some embodiments, the frequency configuration information can be obtained from system messages sent by the network-side device. The frequency configuration information is carried in the system messages sent by the network-side device.

[0251] In some embodiments, the frequency configuration information can be obtained from the RRC reconfiguration message sent by the network-side device. The frequency configuration information is carried in the RRC reconfiguration message sent by the network-side device.

[0252] In some embodiments, the frequency configuration information can be obtained based on an RRC reconfiguration message sent by the relay terminal, wherein the RRC reconfiguration message is sent by the network-side device to the relay terminal. The RRC reconfiguration message may be a Sidelink RRC reconfiguration message.

[0253] It should be understood that the RRC reconfiguration message sent by the network-side device to the relay terminal is forwarded by the relay terminal to the terminal. This RRC message carries frequency configuration information.

[0254] The frequency configuration information includes at least one of the following:

[0255] First frequency list; Second frequency list; CAPC configuration information; LBT configuration information.

[0256] For specific definitions of the first frequency list, second frequency list, CAPC configuration information, and LBT configuration information, please refer to [link / reference]. Figure 5 The relevant descriptions of the embodiments shown will not be repeated here.

[0257] It is worth noting that when the terminal receives frequency configuration information, it indicates that the network-side device supports allocating Sidelink resources on unlicensed frequencies for Sidelink communication to the terminal. When the terminal does not receive frequency configuration information, it indicates that the network-side device does not support allocating Sidelink resources on unlicensed frequencies for Sidelink communication to the terminal. It should be understood that the relevant meanings regarding Sidelink resources can be found in [reference needed]. Figure 2 The relevant description of step 210 in the illustrated embodiment.

[0258] In this process, if the network-side device has already sent frequency configuration information, the terminal further determines whether the terminal is in a connected state. If the terminal is in an idle state or an inactive state, the terminal determines the target Sidelink resource on the unlicensed frequency from the first resource pool sent by the network-side device. The first resource pool includes at least one candidate Sidelink resource on the unlicensed frequency.

[0259] It is worth noting that when the terminal is in an idle or inactive state, regardless of whether the unlicensed frequency that the terminal is about to request is in the frequency configuration information, the target Sidelink resource on the unlicensed frequency is determined from the first resource pool issued by the network-side device.

[0260] The first resource pool can be sent from the network-side device to the terminal via a system message, which carries the first resource pool information. The terminal can select at least one sidelink resource from the first resource pool as the target sidelink resource according to a second preset rule.

[0261] The target Sidelink resource is a resource used for Sidelink communication, that is, the target Sidelink resource is used for Sidelink sending and / or Sidelink receiving in Sidelink communication.

[0262] Based on the target sidelink resource, a terminal can use this target sidelink resource to communicate with a destination terminal via sidelink. Sidelink communication can be conducted via a direct sidelink link or via an indirect sidelink link. Direct sidelink communication refers to two terminals communicating directly without a relay terminal, while indirect sidelink communication refers to two terminals communicating via at least one relay terminal.

[0263] Therefore, if the network-side device has already sent frequency configuration information to the terminal, and the terminal is in an idle or inactive state, the terminal will determine a target Sidelink resource on an unlicensed frequency from the first resource pool for Sidelink communication, and then perform Sidelink communication on that target Sidelink resource. This not only expands the available frequency resources for Sidelink to provide high-bandwidth, low-latency Sidelink communication links, but also ensures that the terminal can request a target Sidelink resource on an unlicensed frequency even when it is in an idle or inactive state.

[0264] Figure 10 This is a flowchart illustrating a communication method according to some embodiments. For example... Figure 10 As shown, this communication method can be used in a terminal and includes the following steps.

[0265] In step 1010, the target Sidelink resource is determined from a second resource pool pre-configured by the terminal, wherein the second resource pool includes at least one candidate Sidelink resource on an unlicensed frequency.

[0266] Here, the second resource pool is a pre-configured resource pool that includes at least one candidate Sidelink resource on an unlicensed frequency, and this second resource pool can be stored on the terminal. When the terminal needs to request a Sidelink resource on an unlicensed frequency, the terminal determines the target Sidelink resource on the unlicensed frequency from the second resource pool.

[0267] It is worth noting that the second resource pool can be a resource pool pre-configured by the terminal that includes Sidelink resources available to the terminal on unlicensed frequencies.

[0268] Based on this second resource pool, even if the network-side device has not sent any usable sidelink resources on unlicensed frequencies to the terminal, the terminal can still determine the target sidelink resource on the unlicensed frequency. Furthermore, regardless of the terminal's operating state, the terminal can determine the target sidelink resource based on the second resource pool. For example, the target sidelink resource can be determined through the second resource pool when the terminal is in a connected state, an idle state, or an inactive state.

[0269] Specifically, the terminal can determine the target Sidelink resource on an unlicensed frequency from the second resource pool based on a third preset rule. For example, it can select a Sidelink resource with high bandwidth and low latency that is not on an unlicensed frequency from the second resource pool as the target Sidelink resource.

[0270] In step 1020, Sidelink communication is performed on the target Sidelink resource.

[0271] Here, the target Sidelink resource is a resource used for Sidelink communication, that is, the target Sidelink resource is used for Sidelink sending resources and / or Sidelink receiving resources for Sidelink communication.

[0272] Based on the target sidelink resource, a terminal can use this target sidelink resource to communicate with a destination terminal via sidelink. Sidelink communication can be conducted via a direct sidelink link or via an indirect sidelink link. Direct sidelink communication refers to two terminals communicating directly without a relay terminal, while indirect sidelink communication refers to two terminals communicating via at least one relay terminal.

[0273] Therefore, by identifying target Sidelink resources on unlicensed frequencies for Sidelink communication from a pre-configured second resource pool, the terminal can determine the target Sidelink resources on unlicensed frequencies even when the network-side equipment does not support the allocation of Sidelink resources on unlicensed frequencies. This expands the available frequency resources for Sidelink, providing high-bandwidth, low-latency Sidelink communication links.

[0274] Figure 11 This is a flowchart illustrating a communication method according to other embodiments. For example... Figure 11 As shown, this communication method can be used in a terminal and includes the following steps.

[0275] Step 1110: Determine whether the network-side device sends frequency configuration information to the terminal.

[0276] Step 1120: If the network-side device has sent frequency configuration information, determine the target Sidelink resource on the unlicensed frequency from the second resource pool pre-configured by the terminal, wherein the second resource pool includes at least one candidate Sidelink resource on the unlicensed frequency.

[0277] Step 1130: Perform Sidelink communication on the target Sidelink resource.

[0278] Here, the terminal can request the network-side device to send frequency configuration information to the terminal, or receive frequency configuration information broadcast by the network-side device. The terminal can determine whether the network-side device has sent frequency configuration information to the terminal based on whether the terminal has received the frequency configuration information. When the terminal receives the frequency configuration information, it is determined that the network-side device has sent the frequency configuration information; when the terminal does not receive the frequency configuration information, it is determined that the network-side device has not sent the frequency configuration information.

[0279] The frequency configuration information is used to enable the terminal to determine the target Sidelink resource on the unlicensed frequency for Sidelink communication.

[0280] In some embodiments, the frequency configuration information can be obtained from system messages sent by the network-side device. The frequency configuration information is carried in the system messages sent by the network-side device.

[0281] In some embodiments, the frequency configuration information can be obtained from the RRC reconfiguration message sent by the network-side device. The frequency configuration information is carried in the RRC reconfiguration message sent by the network-side device.

[0282] In some embodiments, the frequency configuration information can be obtained based on an RRC reconfiguration message sent by the relay terminal, wherein the RRC reconfiguration message is sent by the network-side device to the relay terminal. The RRC reconfiguration message may be a Sidelink RRC reconfiguration message.

[0283] It should be understood that the RRC reconfiguration message sent by the network-side device to the relay terminal is forwarded by the relay terminal to the terminal. This RRC message carries frequency configuration information.

[0284] The frequency configuration information includes at least one of the following:

[0285] First frequency list; Second frequency list; CAPC configuration information; LBT configuration information.

[0286] For specific definitions of the first frequency list, second frequency list, CAPC configuration information, and LBT configuration information, please refer to [link / reference]. Figure 5 The relevant descriptions of the embodiments shown will not be repeated here.

[0287] It is worth noting that when the terminal receives frequency configuration information, it indicates that the network-side device supports allocating Sidelink resources on unlicensed frequencies for Sidelink communication to the terminal. When the terminal does not receive frequency configuration information, it indicates that the network-side device does not support allocating Sidelink resources on unlicensed frequencies for Sidelink communication to the terminal. It should be understood that the relevant meanings regarding Sidelink resources can be found in [reference needed]. Figure 2 The relevant description of step 210 in the illustrated embodiment.

[0288] In the case where the network-side device does not send frequency configuration information, the terminal determines the target Sidelink resource on the unlicensed frequency from the second resource pool pre-configured by the terminal, so as to perform Sidelink communication based on the target Sidelink resource.

[0289] It should be understood that step 1010 above has already explained in detail how to determine the target Sidelink resource at the unlicensed frequency in the second resource pool, and will not be repeated here.

[0290] It is worth noting that when the network-side device does not send frequency configuration information, there is no need to confirm the terminal's operating status. Instead, the target Sidelink resource on the unlicensed frequency is directly determined from the second resource pool. That is, when the network-side device does not send frequency configuration information, regardless of whether the terminal is in a connected state, an idle state, or an inactive state, the target Sidelink resource on the unlicensed frequency is determined from the pre-configured second resource pool.

[0291] Therefore, even when the network-side device does not send frequency configuration information, by determining the target Sidelink resource for Sidelink communication on an unlicensed frequency from the pre-configured second resource pool, the terminal can identify the target Sidelink resource for Sidelink communication even if the network-side device does not support the allocation of Sidelink resources on unlicensed frequencies. This expands the available frequency resources for Sidelink, providing a high-bandwidth, low-latency Sidelink communication link.

[0292] Figure 12 This is a flowchart illustrating a communication method according to some embodiments. For example... Figure 12 As shown, this communication method can be used in a terminal and includes the following steps.

[0293] In step 1210, a second resource request is sent to the network-side device, wherein the second resource request is used to request the network-side device to allocate Sidelink resources for the terminal on a specified unlicensed frequency.

[0294] Here, the terminal can send a second resource request to the network-side device, which requests the network-side device to allocate Sidelink resources for the terminal on a specified unlicensed frequency. In some embodiments, the second resource request can be carried through a SidelinkUEInformation message.

[0295] The specified unlicensed frequency can be at least one unlicensed frequency determined by the terminal from among the unlicensed frequencies supported by the network-side equipment. It should be understood that the relevant meanings regarding Sidelink resources can be found in [reference needed]. Figure 2 The relevant description of step 210 in the illustrated embodiment.

[0296] When the terminal is in a connected state, it can send a second resource request to the network-side device, so that the network-side device can respond to the second resource request and allocate the Sidelink resource specified by the terminal on the specified unlicensed frequency.

[0297] In some embodiments, the second resource request includes at least one of the following:

[0298] Second destination terminal identifier; second logical channel identifier; transmission frequency identifier; second unlicensed frequency identifier.

[0299] Wherein, the second destination terminal identifier is used to indicate that the data transmission frequency of the destination terminal is the Sidelink resource on the specified unlicensed frequency; the second logical channel identifier is used to indicate that the data transmission frequency of the logical channel is the specified unlicensed frequency; the transmission frequency identifier is used to indicate that at least one unlicensed frequency in the frequency configuration information is the specified unlicensed frequency; the second unlicensed frequency identifier is used to indicate that the Sidelink resource requested by the terminal is on the specified unlicensed frequency when the transmission frequency of the data to be transmitted is an unlicensed frequency.

[0300] Here, the destination terminal refers to the peer terminal that communicates with the terminal via Sidelink. For example... Figure 1 As shown, the second terminal 12 is the destination terminal of the first terminal 11. By carrying a second target terminal identifier in the second resource request, the destination terminal can be instructed to use a Sidelink resource on a specified unlicensed frequency for data transmission in Sidelink communication. By carrying a second logical channel identifier in the second resource request, the data transmission frequency of the logical channel in Sidelink communication can be indicated to be on a specified unlicensed frequency.

[0301] The transmitted frequency identifier is used to indicate that at least one unlicensed frequency in the frequency configuration information is a designated unlicensed frequency. Specifically, since the second resource request carries a designated unlicensed frequency specified by the terminal, this designated unlicensed frequency is determined from the first frequency list and / or the second frequency list.

[0302] The second unlicensed frequency identifier is used to indicate that the Sidelink resource requested by the terminal from the network-side device is on a specified unlicensed frequency. By including the second unlicensed identifier in the second resource request, the network-side device can know that the terminal is about to request Sidelink resources on the specified unlicensed frequency, and allocate the Sidelink resources on the specified unlicensed frequency to the terminal according to the second unlicensed identifier.

[0303] In some embodiments, when the frequency configuration information includes multiple frequency lists, the transmit frequency identifier includes a first identifier for indicating the order of the multiple frequency lists.

[0304] The first identifier is used to distinguish the order of multiple frequency lists.

[0305] In some embodiments, when the frequency configuration information includes a plurality of frequency lists, if the second resource request includes the second unlicensed frequency identifier, the transmission frequency identifier includes:

[0306] A second identifier is used to indicate a first target frequency list, wherein the first target frequency list is a frequency list of the plurality of frequency lists that carries the unauthorized frequency corresponding to the second unauthorized frequency identifier.

[0307] Here, the second resource request includes a second unlicensed frequency identifier, indicating that the terminal is requesting Sidelink resources on an unlicensed frequency. The first target frequency list is a list of frequencies from multiple frequency lists that carry the unlicensed frequency corresponding to the second unlicensed frequency identifier. Through the second identifier, the network-side device can determine the frequency list containing the unlicensed frequency corresponding to the second unlicensed frequency identifier.

[0308] In some embodiments, when the frequency configuration information includes a multiple frequency list, if the second resource request does not carry the second unlicensed frequency identifier, the transmitted frequency identifier includes:

[0309] A third identifier is used to indicate a second target frequency list, which is a list of frequencies carrying licensed frequencies among the plurality of frequency lists.

[0310] Here, the second resource request does not carry the second unlicensed frequency identifier, indicating that the terminal is requesting Sidelink resources on a licensed frequency. The second target frequency list is a list of frequencies that carry licensed frequency resources from multiple frequency lists. The network-side device can determine the frequency list containing the licensed frequency through the third identifier.

[0311] In step 1220, the Sidelink resource allocated by the network-side device on the specified unlicensed frequency is determined as the target Sidelink resource.

[0312] Here, in response to the confirmation information sent by the network-side device, the terminal identifies the Sidelink resource allocated by the network-side device on the specified unlicensed frequency as the target Sidelink resource. This confirmation information is sent by the network-side device to allocate at least one Sidelink resource specified by the terminal on the specified unlicensed frequency.

[0313] It is worth noting that when the network-side device responds to the second resource request and allocates the Sidelink resource specified by the terminal on the specified unlicensed frequency to the terminal, it means that the network-side device selects at least one Sidelink resource from at least one Sidelink resource on the specified unlicensed frequency and allocates it to the terminal.

[0314] In step 1230, Sidelink communication is performed on the target Sidelink resource.

[0315] Here, the target Sidelink resource is a resource used for Sidelink communication, that is, the target Sidelink resource is used for Sidelink sending resources and / or Sidelink receiving resources for Sidelink communication.

[0316] Based on the target sidelink resource, a terminal can use this target sidelink resource to communicate with a destination terminal via sidelink. Sidelink communication can be conducted via a direct sidelink link or via an indirect sidelink link. Direct sidelink communication refers to two terminals communicating directly without a relay terminal, while indirect sidelink communication refers to two terminals communicating via at least one relay terminal.

[0317] Figure 13 This is a communication timing diagram illustrating a communication method according to some embodiments. For example... Figure 13As shown, the terminal sends a second resource request to the network-side device. The network-side device receives the second resource request and, in response to the second resource request, allocates a Sidelink resource on a specified unlicensed frequency to the terminal. The network-side device sends an acknowledgment message to the terminal. The terminal receives the acknowledgment message and, in response to the acknowledgment message, uses the allocated Sidelink resource as the target Sidelink resource.

[0318] Therefore, the terminal sends a second resource request to the network-side device, which then responds by allocating Sidelink resources on a specified unlicensed frequency. The terminal then designates the allocated Sidelink resource on the specified unlicensed frequency as the target Sidelink resource for Sidelink communication, and performs Sidelink communication on that target Sidelink resource. This allows the terminal to autonomously select unlicensed frequencies for Sidelink communication, thereby expanding the available frequency resources for Sidelink and providing high-bandwidth, low-latency Sidelink communication links.

[0319] Figure 14 This is a flowchart illustrating a communication method according to other embodiments. For example... Figure 14 As shown, this communication method can be used in a terminal and includes the following steps.

[0320] In step 1410, frequency configuration information sent by the network-side device is received.

[0321] Here, the terminal can request the network-side device to send frequency configuration information to the terminal, or receive frequency configuration information broadcast by the network-side device, in order to obtain the frequency configuration information sent by the network-side device. The frequency configuration information is used by the terminal to determine the target Sidelink resource on the unlicensed frequency for Sidelink communication.

[0322] In some embodiments, the frequency configuration information can be obtained from system messages sent by the network-side device. The frequency configuration information is carried in the system messages sent by the network-side device.

[0323] In some embodiments, the frequency configuration information can be obtained from the RRC reconfiguration message sent by the network-side device. The frequency configuration information is carried in the RRC reconfiguration message sent by the network-side device.

[0324] In some embodiments, the frequency configuration information can be obtained based on the RRC reconfiguration message sent by the relay terminal, wherein the RRC reconfiguration message is sent by the network-side device to the relay terminal.

[0325] It should be understood that the network-side device sends an RRC reconfiguration message to the relay terminal, and the relay terminal forwards this RRC reconfiguration message to the terminal. This RRC message carries frequency configuration information. The RRC reconfiguration message can be a Sidelink RRC reconfiguration message.

[0326] The frequency configuration information includes at least one of the following:

[0327] First frequency list, second frequency list, CAPC configuration information, and LBT configuration information.

[0328] For specific definitions of the first frequency list, second frequency list, CAPC configuration information, and LBT configuration information, please refer to [link / reference]. Figure 5 The relevant descriptions of the embodiments shown will not be repeated here.

[0329] In step 1420, the specified unlicensed frequency is determined in the frequency configuration information.

[0330] Here, the terminal can determine the specified unlicensed frequency from the first frequency list and / or the second frequency list in the frequency configuration information.

[0331] For example, the terminal may select at least one unlicensed frequency as the designated unlicensed frequency from the first frequency list and / or the second frequency list according to the fourth preset rule.

[0332] In step 1430, a second resource request is sent to the network-side device, wherein the second resource request is used to request the network-side device to allocate Sidelink resources for the terminal on a specified unlicensed frequency.

[0333] For the specific execution logic of step 1430, please refer to [link / reference]. Figure 12 The description of step 1210 in the illustrated embodiment will not be repeated here.

[0334] In some embodiments, the second resource request includes at least one of the following:

[0335] The second destination terminal identifier, the second logical channel identifier, the transmission frequency identifier, and the second unlicensed frequency identifier.

[0336] The meanings of the second destination terminal identifier, the second logical channel identifier, the transmission frequency identifier, and the second unlicensed frequency identifier can be found in [reference needed]. Figure 12 The following is a description of step 1210 in the illustrated embodiment.

[0337] In step 1440, the Sidelink resource allocated by the network-side device on the specified unlicensed frequency is determined as the target Sidelink resource.

[0338] For the specific execution logic of step 1440, please refer to [link / reference]. Figure 12 The description of step 1220 in the illustrated embodiment will not be repeated here.

[0339] In step 1450, Sidelink communication is performed on the target Sidelink resource.

[0340] For the specific execution logic of step 1450, please refer to [link / reference]. Figure 12 The description of step 1230 in the illustrated embodiment will not be repeated here.

[0341] Therefore, the terminal can determine a specific unlicensed frequency from the frequency configuration information issued by the network-side device and send a second resource request to the network-side device. The network-side device will then respond to this request and allocate Sidelink resources on the specified unlicensed frequency to the terminal. The terminal will then designate the Sidelink resource allocated by the network-side device on the specified unlicensed frequency as the target Sidelink resource for Sidelink communication, and will perform Sidelink communication on that target Sidelink resource. This enables the terminal to autonomously select the target unlicensed frequency resource for Sidelink communication, thereby expanding the available frequency resources for Sidelink and providing a high-bandwidth, low-latency Sidelink communication link.

[0342] Figure 15 This is a flowchart illustrating a communication method according to some embodiments. For example... Figure 15 As shown, this communication method can be used in a terminal and includes the following steps.

[0343] Step 1510: Determine whether the network-side device sends frequency configuration information to the terminal;

[0344] Step 1520: If the network-side device has sent frequency configuration information, determine whether the terminal is in a connected state.

[0345] Step 1530: When the terminal is in a connected state, determine whether the specified unlicensed frequency that the terminal is about to request is in the frequency configuration information;

[0346] Step 1540: If the specified unlicensed frequency that the terminal is about to request is in the frequency configuration information, send a second resource request to the network-side device.

[0347] Step 1560: Determine the Sidelink resource allocated by the network-side device on the specified unlicensed frequency as the target Sidelink resource;

[0348] Step 1570: Perform Sidelink communication on the target Sidelink resource.

[0349] Here, you can refer to the method for performing step 1510. Figure 5 The description of step 510 in the illustrated embodiment will not be repeated here. For information regarding frequency configuration information, please refer to [link / reference needed]. Figure 5 The description of step 510 in the illustrated embodiment will not be repeated here. The method for performing step 1520 can be found in [reference needed]. Figure 5 The description of step 520 in the illustrated embodiment will not be repeated here. For a description of the Sidelink resource, please refer to... Figure 2 The description of step 210 in the illustrated embodiment will not be repeated here.

[0350] The frequency configuration information is used to enable the terminal to determine the target Sidelink resource on the unlicensed frequency for Sidelink communication.

[0351] It is worth noting that, in some embodiments, the frequency configuration information can be obtained based on system messages sent by the network-side device. The frequency configuration information is carried in the system messages sent by the network-side device. In some embodiments, the frequency configuration information can be obtained based on RRC reconfiguration messages sent by the network-side device. The frequency configuration information is carried in the RRC reconfiguration messages sent by the network-side device. In some embodiments, the frequency configuration information can be obtained based on RRC reconfiguration messages sent by the relay terminal, where the RRC reconfiguration message is sent from the network-side device to the relay terminal. It should be understood that the relay terminal forwards the RRC reconfiguration message sent by the network-side device to the terminal. The frequency configuration information is carried in the RRC message. The RRC reconfiguration message can be a SidelinkRRC reconfiguration message.

[0352] In step 1530, if the terminal is in a connected state, it is further determined whether the specified unlicensed frequency that the terminal intends to request is in the frequency configuration information. Specifically, if the specified unlicensed frequency that the terminal intends to request is in the first frequency list and / or the second frequency list, it is determined that the specified unlicensed frequency that the terminal intends to request is in the frequency configuration information. Then, the terminal sends a second resource request to the network-side device, requesting the network-side device to allocate sidelink resources on the specified unlicensed frequency for the terminal. The network-side device responds to the second resource request and allocates the sidelink resources on the specified unlicensed frequency as the terminal's target sidelink resource.

[0353] In some embodiments, the second resource request can be carried through a SidelinkUEInformation message.

[0354] It is worth noting that the second resource request carries a specified unlicensed frequency designated by the terminal. This specified unlicensed frequency may be determined by the terminal from the first frequency list and / or the second frequency list. For example, the terminal may select at least one unlicensed frequency as the specified unlicensed frequency from the first frequency list and / or the second frequency list according to a fourth preset rule.

[0355] In some embodiments, the second resource request includes at least one of the following:

[0356] Second destination terminal identifier; second logical channel identifier; transmission frequency identifier; second unlicensed frequency identifier.

[0357] It is worth noting that the meanings of the second destination terminal identifier, the second logical channel identifier, the transmission frequency identifier, and the second unlicensed frequency identifier can be found in [reference needed]. Figure 14 The relevant descriptions of step 1430 in the illustrated embodiments will not be repeated here.

[0358] In step 1540, the terminal identifies the Sidelink resource allocated by the network-side device on the specified unlicensed frequency as the target Sidelink resource. In step 1550, the target Sidelink resource is a resource used for Sidelink communication, that is, the target Sidelink resource is used for Sidelink transmission resources and / or Sidelink reception resources for Sidelink communication.

[0359] Based on the target sidelink resource, a terminal can use this target sidelink resource to communicate with a destination terminal via sidelink. Sidelink communication can be conducted via a direct sidelink link or via an indirect sidelink link. Direct sidelink communication refers to two terminals communicating directly without a relay terminal, while indirect sidelink communication refers to two terminals communicating via at least one relay terminal.

[0360] Therefore, if the terminal is in a connected state and the network-side device has already sent frequency configuration information to the terminal, the terminal can specify a designated unlicensed frequency in the frequency configuration information sent by the network-side device and send a second resource request to the network-side device. The network-side device will then respond to this second resource request and allocate sidelink resources on the specified unlicensed frequency to the terminal. The terminal will then designate the sidelink resource allocated by the network-side device on the specified unlicensed frequency as the target sidelink resource for sidelink communication, and will perform sidelink communication on that target sidelink resource. This enables the terminal to autonomously select a target sidelink resource on an unlicensed frequency for sidelink communication, thereby expanding the available frequency resources for sidelink and providing a high-bandwidth, low-latency sidelink communication link.

[0361] Figure 16 This is a flowchart illustrating a communication method according to some embodiments. For example... Figure 16 As shown, this communication method can be used in a terminal and includes the following steps.

[0362] In step 1610, the target Sidelink resource on the unlicensed frequency is determined based on the frequency configuration information issued by the network-side device and the third resource pool.

[0363] Here, you can refer to the relevant information regarding frequency configuration. Figure 5 The description of step 510 in the illustrated embodiments will not be repeated here. In some embodiments, the frequency configuration information can be obtained based on system messages sent by the network-side device. The frequency configuration information is carried in the system messages sent by the network-side device. In some embodiments, the frequency configuration information can be obtained based on RRC reconfiguration messages sent by the network-side device. The frequency configuration information is carried in the RRC reconfiguration messages sent by the network-side device. In some embodiments, the frequency configuration information can be obtained based on RRC reconfiguration messages sent by the relay terminal, where the RRC reconfiguration message is sent from the network-side device to the relay terminal. It should be understood that the relay terminal forwards the RRC reconfiguration message sent by the network-side device to the terminal. The frequency configuration information is carried in the RRC message. The RRC reconfiguration message can be a Sidelink RRC reconfiguration message.

[0364] The frequency configuration information is used to enable the terminal to determine the target Sidelink resource on the unlicensed frequency for Sidelink communication.

[0365] The third resource pool includes at least one candidate Sidelink resource on an unlicensed frequency. For a description of Sidelink resources, please refer to [link to relevant documentation / reference]. Figure 2 The description of step 210 in the illustrated embodiment will not be repeated here.

[0366] The third resource pool can be issued by the network-side device. In some embodiments, the terminal can obtain the third resource pool based on a system message sent by the network-side device. The third resource pool is carried in this system message.

[0367] Specifically, determining the target sidelink resource on an unlicensed frequency based on the frequency configuration information issued by the network-side device and the third resource pool can be as follows: When the terminal is in an idle or inactive state, if the unlicensed frequency that the terminal wants to request is in the first frequency list and / or the second frequency list in the frequency configuration information, the terminal can determine the target sidelink resource on the unlicensed frequency from the third resource pool according to the fifth preset rule. For example, selecting a sidelink resource on the unlicensed frequency to be requested from the third resource pool as the target sidelink resource.

[0368] It is worth noting that when the terminal is in an idle or inactive state, since there is no communication between the terminal and the network-side device, if the unlicensed frequency that the terminal wants to request is in the first frequency list and / or the second frequency list of the frequency configuration information, the terminal can determine the target Sidelink resource on the unlicensed frequency from the third resource pool.

[0369] In step 1620, Sidelink communication is performed on the target Sidelink resource.

[0370] Here, the target Sidelink resource is a resource used for Sidelink communication, that is, the target Sidelink resource is used for Sidelink sending resources and / or Sidelink receiving resources for Sidelink communication.

[0371] Based on the target sidelink resource, a terminal can use this target sidelink resource to communicate with a destination terminal via sidelink. Sidelink communication can be conducted via a direct sidelink link or via an indirect sidelink link. Direct sidelink communication refers to two terminals communicating directly without a relay terminal, while indirect sidelink communication refers to two terminals communicating via at least one relay terminal.

[0372] Therefore, by using frequency configuration information and the third resource pool, the terminal determines the Sidelink resource on the unlicensed frequency for Sidelink communication, and performs Sidelink communication on the target Sidelink resource. This not only expands the available frequency resources for Sidelink to provide a high-bandwidth, low-latency Sidelink communication link, but also allows the terminal to request the target Sidelink resource on the unlicensed frequency even when it is in an idle or inactive state.

[0373] Figure 17 This is a flowchart illustrating a communication method according to some embodiments. For example... Figure 17 As shown, this communication method can be used in a terminal and includes the following steps.

[0374] Step 1710: Determine whether the network-side device sends frequency configuration information to the terminal;

[0375] Step 1720: If the network-side device has sent frequency configuration information, determine whether the terminal is in a connected state.

[0376] Step 1730: When the terminal is in an idle or inactive state, determine whether the unlicensed frequency that the terminal is about to request is in the frequency configuration information;

[0377] Step 1740: If the unlicensed frequency that the terminal is about to request is in the frequency configuration information, determine the target Sidelink resource on the unlicensed frequency in the third resource pool.

[0378] Step 1750: Perform Sidelink communication on the target Sidelink resource.

[0379] Here, you can refer to the method for performing step 1710. Figure 5 The description of step 510 in the illustrated embodiment will not be repeated here. For information regarding frequency configuration information, please refer to [link / reference needed]. Figure 5 The description of step 510 in the illustrated embodiment will not be repeated here. The method for performing step 1720 can be found in [reference needed]. Figure 5 The description of step 520 in the illustrated embodiment will not be repeated here. For a description of the Sidelink resource, please refer to... Figure 2 The description of step 210 in the illustrated embodiment will not be repeated here.

[0380] The frequency configuration information is used to enable the terminal to determine the target Sidelink resource on the unlicensed frequency for Sidelink communication.

[0381] In some embodiments, the frequency configuration information can be obtained from system messages sent by the network-side device. The frequency configuration information is carried in the system messages sent by the network-side device. In some embodiments, the frequency configuration information can be obtained from RRC reconfiguration messages sent by the network-side device. The frequency configuration information is carried in the RRC reconfiguration messages sent by the network-side device. In some embodiments, the frequency configuration information can be obtained from RRC reconfiguration messages sent by the relay terminal, where the RRC reconfiguration message is sent from the network-side device to the relay terminal. It should be understood that the relay terminal forwards the RRC reconfiguration message sent by the network-side device to the terminal. The frequency configuration information is carried in the RRC message. The RRC reconfiguration message can be a Sidelink RRC reconfiguration message.

[0382] In step 1730, when the terminal is in an idle or inactive state, it is further determined whether the unlicensed frequency resource that the terminal is about to request is in the frequency configuration information. If the unlicensed frequency resource that the terminal is about to request is in the first frequency list and / or the second frequency list, it means that the unlicensed frequency resource that the terminal is about to request is in the frequency configuration information.

[0383] In step 1740, if the unlicensed frequency resource to be requested by the terminal is in the frequency configuration information, the terminal can determine the target Sidelink resource on the unlicensed frequency from the third resource pool according to the fifth preset rule.

[0384] The third resource pool is also issued by the network-side device. In some embodiments, the terminal can obtain the third resource pool based on a system message sent by the network-side device. This system message carries the information about the third resource pool.

[0385] It is worth noting that when the terminal is in an idle or inactive state, since there is no communication between the terminal and the network-side device, if the unlicensed frequency resource that the terminal wants to request is in the first frequency list and / or the second frequency list in the frequency configuration information, the terminal can determine the target Sidelink resource on the unlicensed frequency from the third resource pool.

[0386] In step 1750, the target unlicensed frequency resource is an unlicensed frequency resource used for Sidelink communication, that is, the target unlicensed frequency resource is used for Sidelink transmit frequency resources and / or Sidelink receive frequency resources.

[0387] Based on the target unlicensed frequency resources, the terminal can use the target licensed frequency resources to communicate with the destination terminal via sidelink. This sidelink communication can be conducted via a direct sidelink link or an indirect sidelink link.

[0388] Therefore, if the network-side device has sent frequency configuration information to the terminal, and the terminal is in an idle or inactive state and the unlicensed frequency resource that the terminal wants to request is in the first frequency list and / or the second frequency list in the frequency configuration information, then the target unlicensed frequency resource for Sidelink communication is determined in the third resource pool, so that Sidelink communication can be performed on the target unlicensed frequency resource. This not only expands the available frequency resources for Sidelink to provide a high-bandwidth, low-latency Sidelink communication link, but also ensures that the terminal can request the target unlicensed frequency resource even if it is in an idle or inactive state.

[0389] Figure 18 This is a flowchart illustrating a communication method according to some embodiments. For example... Figure 18 As shown, this communication method can be used in a terminal and includes the following steps.

[0390] In step 1810, if the unlicensed frequency that the terminal wants to request is not in the frequency configuration information issued by the network-side device, the target Sidelink resource is determined from the pre-configured fourth resource pool, wherein the fourth resource pool includes at least one candidate Sidelink resource on the unlicensed frequency.

[0391] Here, you can refer to the relevant information regarding frequency configuration. Figure 5 The description of step 510 in the illustrated embodiments will not be repeated here. In some embodiments, the frequency configuration information can be obtained based on system messages sent by the network-side device. The frequency configuration information is carried in the system messages sent by the network-side device. In some embodiments, the frequency configuration information can be obtained based on RRC reconfiguration messages sent by the network-side device. The frequency configuration information is carried in the RRC reconfiguration messages sent by the network-side device. In some embodiments, the frequency configuration information can be obtained based on RRC reconfiguration messages sent by the relay terminal, where the RRC reconfiguration message is sent from the network-side device to the relay terminal. It should be understood that the relay terminal forwards the RRC reconfiguration message sent by the network-side device to the terminal. The frequency configuration information is carried in the RRC message. The RRC reconfiguration message can be a Sidelink RRC reconfiguration message.

[0392] The frequency configuration information is used to enable the terminal to determine the target Sidelink resource on the unlicensed frequency for Sidelink communication.

[0393] If the unlicensed frequency that the terminal wants to request is not in the first frequency list and / or the second frequency list of the frequency configuration information, the terminal can determine the target Sidelink resource on the unlicensed frequency from the fourth resource pool according to the sixth preset rule. It should be understood that the relevant description of Sidelink resources can be found in [reference needed]. Figure 2 The description of step 210 in the illustrated embodiment will not be repeated here.

[0394] The fourth resource pool is a pre-configured pool containing at least one candidate sidelink resource on an unlicensed frequency, and this pool can be stored on the terminal. When the unlicensed frequency requested by the terminal is not in the frequency configuration information sent by the network-side device, the terminal can determine the target sidelink resource on the unlicensed frequency from the fourth resource pool according to a sixth preset rule. For example, a sidelink resource can be randomly selected from the fourth resource pool as the target sidelink resource, or an idle sidelink resource can be selected as the target sidelink resource.

[0395] It is worth noting that this fourth resource pool can be a resource pool pre-configured by the terminal that includes Sidelink resources available to the terminal on unlicensed frequencies.

[0396] In step 1820, Sidelink communication is performed on the target Sidelink resource.

[0397] Here, the target Sidelink resource is a resource used for Sidelink communication, that is, the target Sidelink resource is used for Sidelink sending resources and / or Sidelink receiving resources for Sidelink communication.

[0398] Based on the target sidelink resource, a terminal can use this target sidelink resource to communicate with a destination terminal via sidelink. Sidelink communication can be conducted via a direct sidelink link or via an indirect sidelink link. Direct sidelink communication refers to two terminals communicating directly without a relay terminal, while indirect sidelink communication refers to two terminals communicating via at least one relay terminal.

[0399] Therefore, even if the unlicensed frequency requested by the terminal is not in the first and / or second frequency lists of the frequency configuration information, the terminal can still identify the Sidelink resource on the unlicensed frequency as the target Sidelink resource. Furthermore, regardless of the terminal's operating state, the terminal can determine the target Sidelink resource based on the fourth resource pool. For example, when the terminal is in a connected, idle, or inactive state, it can still determine the target Sidelink resource through the fourth resource pool. This expands the available frequency resources for Sidelink, providing a high-bandwidth, low-latency Sidelink communication link.

[0400] Figure 19 This is a flowchart illustrating a communication method according to other embodiments. For example... Figure 19 As shown, this communication method can be used in a terminal and includes the following steps.

[0401] Step 1910: Determine whether the network-side device sends frequency configuration information to the terminal;

[0402] Step 1920: Determine whether the unlicensed frequency that the terminal is about to request is in the frequency configuration information;

[0403] Step 1930: If the unlicensed frequency that the terminal is about to request is not in the frequency configuration information, determine the target Sidelink resource on the unlicensed frequency in the fourth resource pool;

[0404] Step 1940: Perform Sidelink communication on the target Sidelink resource.

[0405] Here, you can refer to the method for performing step 1910. Figure 5 The description of step 510 in the illustrated embodiment will not be repeated here. For information regarding frequency configuration information, please refer to [link / reference needed]. Figure 5 The description of step 510 in the illustrated embodiment will not be repeated here. For a description of the Sidelink resource, please refer to... Figure 2 The description of step 210 in the illustrated embodiment will not be repeated here.

[0406] In step 1920, if the unlicensed frequency that the terminal wants to request is not in the first frequency list and / or the second frequency list, it means that the unlicensed frequency that the terminal wants to request is not in the frequency configuration information.

[0407] In step 1930, if the unlicensed frequency that the terminal wants to request is not in the frequency configuration information, the terminal can determine the target Sidelink resource on the unlicensed frequency from the fourth resource pool according to the sixth preset rule.

[0408] The fourth resource pool is a pre-configured pool containing at least one candidate sidelink resource on an unlicensed frequency, which can be stored on the terminal. When the unlicensed frequency requested by the terminal is not in the frequency configuration information sent by the network-side device, the terminal can determine the target sidelink resource on the unlicensed frequency from the fourth resource pool according to a sixth preset rule. For example, at least one sidelink resource can be randomly selected as the target sidelink resource, or an idle sidelink resource can be selected as the target sidelink resource.

[0409] It is worth noting that this fourth resource pool can be a resource pool pre-configured by the terminal that includes Sidelink resources available to the terminal on unlicensed frequencies.

[0410] In addition, in this embodiment, regardless of whether the terminal is in a connected state, an idle state, or an inactive state, as long as the unlicensed frequency that the terminal wants to request is not in the first frequency list and / or the second frequency list, the target Sidelink resource on the unlicensed frequency is determined from the fourth resource pool pre-configured by the terminal.

[0411] For the specific execution process of step 1940, please refer to... Figure 2 The relevant description of step 220 in the illustrated embodiment will not be repeated here.

[0412] Therefore, even if the unlicensed frequency the terminal wants to request is not in the first frequency list and / or the second frequency list in the frequency configuration information, the terminal can still determine the target Sidelink resource. Moreover, regardless of the terminal's operating state, the terminal can determine the target Sidelink resource based on the fourth resource pool. For example, when the terminal is in a connected state, an idle state, or an inactive state, it can determine the target Sidelink resource through the fourth resource pool. This expands the available frequency resources for Sidelink, providing a high-bandwidth, low-latency Sidelink communication link.

[0413] Figure 20 This is a flowchart illustrating a communication method according to some embodiments. For example... Figure 20 As shown, this communication method can be used in a terminal and includes the following steps.

[0414] Step 2010: Determine whether the network-side device sends frequency configuration information to the terminal;

[0415] Step 2011: If the network-side device has sent frequency configuration information, determine whether the terminal is in a connected state.

[0416] Step 2012: When the terminal is in a connected state, send a first resource request to the network-side device to request the network-side device to allocate Sidelink resources on an unlicensed frequency for the terminal, and then execute step 2021.

[0417] Step 2013: When the terminal is in an idle or inactive state, determine the target Sidelink resource on the unlicensed frequency from the first resource pool issued by the network-side device, wherein the first resource pool includes at least one candidate Sidelink resource on the unlicensed frequency, and execute step 2021.

[0418] Step 2014: If the network-side device does not send frequency configuration information, determine whether the unlicensed frequency that the terminal is about to request is in the frequency configuration information; if the unlicensed frequency that the terminal is about to request is not in the frequency configuration information, proceed to step 2015.

[0419] Step 2015: Determine the target Sidelink resource on the unlicensed frequency in the fourth resource pool, and proceed to step 2021.

[0420] Step 2016: If the network-side device does not send frequency configuration information, determine the target Sidelink resource on the unlicensed frequency from the second resource pool pre-configured by the terminal, wherein the second resource pool includes at least one candidate Sidelink resource on the unlicensed frequency, and execute step 2021.

[0421] Step 2017: If the terminal is in an idle or inactive state, determine whether the unlicensed frequency that the terminal is about to request is in the frequency configuration information. If the unlicensed frequency that the terminal is about to request is in the frequency configuration information, execute step 2018 and step 2021.

[0422] Step 2018: Identify the target Sidelink resource on the unlicensed frequency in the third resource pool;

[0423] Step 2019: If the terminal is in a connected state, determine whether the unlicensed frequency that the terminal is about to request is in the frequency configuration information. If the unlicensed frequency that the terminal is about to request is in the frequency configuration information, execute step 2020 and step 2021.

[0424] Step 2020: Send a second resource request to the network-side device to request the network-side device to allocate Sidelink resources for the terminal on a specified unlicensed frequency;

[0425] Step 2021: Perform Sidelink communication on the target Sidelink resource.

[0426] For the steps involved in executing step 2010, please refer to [link / reference]. Figure 5 The description of step 510 in the illustrated embodiment will not be repeated here. For the method steps performed in step 2011, please refer to... Figure 5 The description of step 520 in the illustrated embodiment will not be repeated here. For the method steps performed in step 2012, please refer to... Figure 5 The descriptions of steps 530 and 540 in the illustrated embodiments will not be repeated here. For a description of Sidelink resources, please refer to... Figure 2 The description of step 210 in the illustrated embodiment will not be repeated here.

[0427] For the steps involved in executing step 2013, please refer to [link / reference]. Figure 6 The description of step 610 in the illustrated embodiment will not be repeated here. For the method steps performed in step 2014, please refer to... Figure 15 The description of step 1530 in the illustrated embodiment will not be repeated here. For the method steps performed in step 2015, please refer to [reference needed]. Figure 18 The description of step 1810 in the illustrated embodiment will not be repeated here. For the method steps performed in step 2016, please refer to [reference needed]. Figure 10 The description of step 1010 in the illustrated embodiment will not be repeated here. For the method steps of step 2017, please refer to... Figure 17 The description of step 1730 in the illustrated embodiment will not be repeated here. For the method steps performed in step 2018, please refer to... Figure 16 The description of step 1610 in the illustrated embodiment will not be repeated here. For the method steps of step 2019, please refer to... Figure 17 The description of step 1730 in the illustrated embodiment will not be repeated here. For the method steps of step 2020, please refer to... Figure 14 The relevant descriptions in the illustrated embodiments will not be repeated here. For the method steps performed in step 2021, please refer to... Figure 5 The description of step 550 in the illustrated embodiment will not be repeated here.

[0428] Therefore, by identifying a target Sidelink resource on an unlicensed frequency for Sidelink communication, the terminal can expand the available frequency resources for Sidelink to provide a high-bandwidth, low-latency Sidelink communication link.

[0429] This disclosure provides a communication method applied to a network-side device, the method comprising:

[0430] Frequency configuration information is sent to the terminal, wherein the frequency configuration information is used to enable the terminal to determine the target Sidelink resource on an unlicensed frequency for Sidelink communication.

[0431] Optionally, the method further includes:

[0432] The first resource request sent by the receiving terminal;

[0433] In response to the first resource request, a Sidelink resource on an unlicensed frequency is allocated to the terminal, so that the terminal identifies the allocated Sidelink resource as the target Sidelink resource.

[0434] Optionally, the first resource request includes at least one of the following:

[0435] First-purpose terminal identifier;

[0436] First logical channel identifier;

[0437] First unauthorized frequency identifier;

[0438] Wherein, the first destination terminal identifier is used to indicate that the data transmission frequency of the destination terminal is a Sidelink resource on an unlicensed frequency; the first logical channel identifier is used to indicate that the data transmission frequency of the logical channel is a Sidelink resource on an unlicensed frequency; and the first unlicensed frequency identifier is used to indicate that the Sidelink resource requested by the terminal is on an unlicensed frequency.

[0439] Optionally, the method further includes:

[0440] A first resource pool is sent to the terminal, wherein the first resource pool is used by the terminal to determine target Sidelink resources on unlicensed frequencies from the first resource pool, and the first resource pool includes at least one candidate Sidelink resource on an unlicensed frequency.

[0441] Optionally, sending the first resource pool to the terminal includes:

[0442] The first resource pool is sent to the terminal via system message.

[0443] Optionally, the method further includes:

[0444] The system receives a second resource request sent by the terminal, wherein the second resource request is used to request the network-side device to allocate Sidelink resources for the terminal on a specified unlicensed frequency, and the specified unlicensed frequency is determined according to the frequency configuration information.

[0445] In response to the second resource request, a Sidelink resource on the specified unlicensed frequency is allocated to the terminal, so that the terminal uses the allocated Sidelink resource as the target Sidelink resource.

[0446] Optionally, the second resource request includes at least one of the following:

[0447] Secondary terminal identifier;

[0448] Second logical channel identifier;

[0449] Transmission frequency identifier;

[0450] Second unauthorized frequency identifier;

[0451] Wherein, the second destination terminal identifier is used to indicate that the data transmission frequency of the destination terminal is the Sidelink resource on the specified unlicensed frequency;

[0452] The second logical channel identifier is used to indicate that the data transmission frequency of the logical channel is the specified unlicensed frequency;

[0453] The transmission frequency identifier is used to indicate that at least one unlicensed frequency in the frequency configuration information is the designated unlicensed frequency;

[0454] The second unlicensed frequency identifier is used to indicate, when the transmission frequency of the data to be transmitted is an unlicensed frequency, that the Sidelink resource requested by the terminal is on the specified unlicensed frequency.

[0455] Optionally, when the frequency configuration information includes multiple frequency lists, the transmit frequency identifier includes:

[0456] A first identifier used to indicate the order of the plurality of frequency lists.

[0457] Optionally, if the frequency configuration information includes a multiple frequency list, and if the second resource request includes the second unlicensed frequency identifier, the transmission frequency identifier includes:

[0458] A second identifier is used to indicate a first target frequency list, wherein the first target frequency list is a frequency list in the plurality of frequency lists that carries unlicensed frequency resources corresponding to the second unlicensed frequency identifier;

[0459] or,

[0460] If the frequency configuration information includes multiple frequency lists, and the second resource request does not carry the second unauthorized frequency identifier, the transmitted frequency identifier includes:

[0461] A third identifier is used to indicate a second target frequency list, which is a list of frequencies carrying licensed frequencies among the plurality of frequency lists.

[0462] Optionally, the method further includes:

[0463] A third resource pool is sent to the terminal, wherein the third resource pool is used by the terminal to determine the target Sidelink resource based on the frequency configuration information and the third resource pool, wherein the third resource pool includes at least one candidate Sidelink resource on an unlicensed frequency.

[0464] Optionally, sending the third resource pool to the terminal includes:

[0465] The third resource pool is sent to the terminal via system message.

[0466] Optionally, the frequency configuration information includes at least one of the following:

[0467] First frequency list;

[0468] Second frequency list;

[0469] CAPC configuration information;

[0470] LBT configuration information;

[0471] The first frequency list includes licensed frequencies and unlicensed frequencies, and the unlicensed frequencies are marked with an unlicensed frequency identifier in the first frequency list;

[0472] The second frequency list includes unlicensed frequencies;

[0473] The CAPC configuration information includes the channel access priority of the Sidelink logical channel and / or the mapping relationship between the QoS identifier and the channel access priority.

[0474] The LBT configuration information includes the maximum number of LBT failures that can trigger a continuous LBT failure event.

[0475] Optionally, the unlicensed frequency identifier includes CAPC configuration information and / or LBT configuration information.

[0476] Optionally, sending frequency configuration information to the terminal includes:

[0477] The frequency configuration information is sent to the terminal via system messages; and / or,

[0478] The frequency configuration information is sent to the terminal via an RRC reconfiguration message; and / or

[0479] The frequency configuration information is sent to the terminal via an RRC reconfiguration message sent to the relay terminal, wherein the RRC reconfiguration message is forwarded to the terminal by the relay terminal.

[0480] For a detailed description of the specific steps of the communication method executed by the network-side device, please refer to the description of the specific steps of the terminal executing the communication method in the above embodiments, which will not be repeated here.

[0481] Figure 21 This is a flowchart illustrating a communication method according to other embodiments. For example... Figure 21 As shown, the communication method includes:

[0482] S2110, The network-side device sends frequency configuration information to the terminal;

[0483] S2120, The terminal confirms that the network-side device has sent frequency configuration information;

[0484] S2130, The terminal determines that it is in a connected state;

[0485] S2140, the terminal sends a first resource request to the network-side device;

[0486] S2150, The network-side device receives the first resource request sent by the terminal;

[0487] S2160, the network-side device responds to the first resource request by allocating Sidelink resources on an unlicensed frequency to the terminal;

[0488] S2170, the terminal uses the Sidelink resource allocated by the network-side device as the target Sidelink resource;

[0489] S2180, the terminal performs Sidelink communication on the target Sidelink resource.

[0490] Figure 22 This is a flowchart illustrating a communication method according to some embodiments. For example... Figure 22 As shown, the communication method includes:

[0491] S2210, The network-side device sends frequency configuration information to the terminal;

[0492] S2220, The terminal confirms that the network-side device has sent frequency configuration information;

[0493] S2230, The terminal determines that it is in a connected state;

[0494] S2240, the terminal specifies the unlicensed frequency in the frequency configuration information;

[0495] S2250, the terminal sends a second resource request to the network-side device;

[0496] S2260, The network-side device receives the second resource request;

[0497] S2270, the network-side device responds to the second resource request by allocating Sidelink resources on a specified unlicensed frequency to the terminal;

[0498] S2280, the terminal uses the Sidelink resource on the specified unlicensed frequency assigned by the network side as the target Sidelink resource;

[0499] S2290, perform Sidelink communication on the target Sidelink resource.

[0500] Figure 23 This is a flowchart illustrating a communication method according to some embodiments. For example... Figure 23 As shown, the communication method includes:

[0501] S2310, The network-side device sends the first resource pool to the terminal;

[0502] S2320, The terminal receives the first resource pool sent by the network-side device;

[0503] S2330, the network-side device sends frequency configuration information to the terminal;

[0504] S2240, The terminal confirms that the network-side device has sent frequency configuration information;

[0505] S2350, the terminal determines whether the terminal is in an idle state or an inactive state;

[0506] S2360, The terminal determines the target Sidelink resource on the unlicensed frequency in the first resource pool;

[0507] S2370, the terminal performs Sidelink communication on the target Sidelink resource.

[0508] Figure 24 This is a flowchart illustrating a communication method according to some embodiments. For example... Figure 24 As shown, the communication method includes:

[0509] S2410, The network-side device sends the third resource pool to the terminal;

[0510] S2420, the terminal receives the third resource pool sent by the network-side device;

[0511] S2430, the network-side device sends frequency configuration information to the terminal;

[0512] S2440, The terminal confirms that the network-side device has sent frequency configuration information;

[0513] S2450, The terminal determines whether it is in an idle state or an inactive state;

[0514] S2460, when the terminal determines that the unlicensed frequency to be requested is in the frequency configuration information, it determines the target Sidelink resource on the unlicensed frequency in the third resource pool;

[0515] S2470, the terminal performs Sidelink communication on the target Sidelink resource.

[0516] Figure 25 This is a flowchart illustrating a communication method according to some embodiments. For example... Figure 25 As shown, the communication method includes:

[0517] S2510, the network-side device sends frequency configuration information to the terminal;

[0518] S2520, The terminal determines that the network-side device has not sent frequency configuration information;

[0519] S2530, the terminal determines the target Sidelink resource on the unlicensed frequency from the second resource pool pre-configured by the terminal;

[0520] S2540, the terminal performs Sidelink communication on the target Sidelink resource.

[0521] Figure 26 This is a flowchart illustrating a communication method according to some embodiments. For example... Figure 26 As shown, the communication method includes:

[0522] S2610, The network-side device sends frequency configuration information to the terminal;

[0523] S2620, The terminal confirms that the network-side device has sent frequency configuration information;

[0524] S2630, The terminal determines that the unlicensed frequency that the terminal is about to request is not in the frequency configuration information;

[0525] S2640, the terminal determines the target Sidelink resource on the unlicensed frequency from the fourth resource pool pre-configured by the terminal;

[0526] S2650, the terminal performs Sidelink communication on the target Sidelink resource.

[0527] Figure 27 This is a block diagram illustrating a communication device according to an exemplary embodiment. (Refer to...) Figure 27 The device 2700 is used in a terminal, and the device 2700 includes:

[0528] Module 2701 is configured to determine target Sidelink resources on unlicensed frequencies;

[0529] Communication module 2702 is configured to perform Sidelink communication on the target Sidelink resource.

[0530] Optionally, the determining module 2701 includes:

[0531] The first sending unit is configured to send a first resource request to a network-side device, wherein the first resource request is used to request the network-side device to allocate Sidelink resources on an unlicensed frequency for the terminal;

[0532] The first determining unit is configured to determine the Sidelink resource allocated by the network-side device as the target Sidelink resource.

[0533] Optionally, the first resource request includes at least one of the following:

[0534] First destination terminal identifier, first logical channel identifier, and first unlicensed frequency identifier;

[0535] Wherein, the first destination terminal identifier is used to indicate that the data transmission frequency of the destination terminal is a Sidelink resource on an unlicensed frequency; the first logical channel identifier is used to indicate that the data transmission frequency of the logical channel is a Sidelink resource on an unlicensed frequency; and the first unlicensed frequency identifier is used to indicate that the Sidelink resource requested by the terminal is on an unlicensed frequency.

[0536] Optionally, the determining module 2701 includes:

[0537] The second determining unit is configured to determine the target Sidelink resource from a first resource pool issued by a network-side device, wherein the first resource pool includes at least one candidate Sidelink resource on an unlicensed frequency.

[0538] Optionally, the second determining unit is further configured to:

[0539] The first resource pool is obtained based on the system message sent by the network-side device.

[0540] Optionally, the determining module 2701 includes:

[0541] The third determining unit is configured to determine the target Sidelink resource from a second resource pool pre-configured by the terminal, wherein the second resource pool includes at least one candidate Sidelink resource on an unlicensed frequency.

[0542] Optionally, the determining module 2701 includes:

[0543] The second sending unit is configured to send a second resource request to the network-side device, wherein the second resource request is used to request the network-side device to allocate Sidelink resources for the terminal on a specified unlicensed frequency;

[0544] The fourth determining unit is configured to determine the Sidelink resource allocated by the network-side device on the specified unlicensed frequency as the target Sidelink resource.

[0545] Optionally, the determining module 2701 further includes:

[0546] The receiving unit is configured to receive frequency configuration information sent by the network-side device;

[0547] The fifth determining unit is configured to determine the specified unlicensed frequency from the frequency configuration information.

[0548] Optionally, the second resource request includes at least one of the following:

[0549] Second destination terminal identifier, second logical channel identifier, transmission frequency identifier, and second unlicensed frequency identifier;

[0550] Wherein, the second destination terminal identifier is used to indicate that the data transmission frequency of the destination terminal is the Sidelink resource on the specified unlicensed frequency;

[0551] The second logical channel identifier is used to indicate that the data transmission frequency of the logical channel is the specified unlicensed frequency;

[0552] The transmission frequency identifier is used to indicate that at least one unlicensed frequency in the frequency configuration information is the designated unlicensed frequency;

[0553] The second unlicensed frequency identifier is used to indicate, when the transmission frequency of the data to be transmitted is an unlicensed frequency, that the Sidelink resource requested by the terminal is on the specified unlicensed frequency.

[0554] Optionally, when the frequency configuration information includes multiple frequency lists, the transmit frequency identifier includes:

[0555] A first identifier used to indicate the order of the plurality of frequency lists.

[0556] Optionally, if the frequency configuration information includes a multiple frequency list, and if the second resource request includes the second unlicensed frequency identifier, the transmission frequency identifier includes:

[0557] A second identifier is used to indicate a first target frequency list, wherein the first target frequency list is a frequency list in the plurality of frequency lists that carries the unauthorized frequency corresponding to the second unauthorized frequency identifier;

[0558] or,

[0559] If the frequency configuration information includes multiple frequency lists, and the second resource request does not carry the second unauthorized frequency identifier, the transmitted frequency identifier includes:

[0560] A third identifier is used to indicate a second target frequency list, which is a list of frequencies carrying licensed frequencies among the plurality of frequency lists.

[0561] Optionally, the determining module 2701 includes:

[0562] The sixth determining unit is configured to determine the target Sidelink resource based on the frequency configuration information issued by the network-side device and the third resource pool, wherein the third resource pool includes at least one candidate Sidelink resource on an unlicensed frequency.

[0563] Optionally, the determining module 2701 is further configured to:

[0564] The third resource pool is obtained based on the system message sent by the network-side device.

[0565] Optionally, the determining module 2701 includes:

[0566] The seventh determining unit is configured to determine the target Sidelink resource from a pre-configured fourth resource pool when the unlicensed frequency to be requested by the terminal is not in the frequency configuration information issued by the network-side device, wherein the fourth resource pool includes at least one candidate Sidelink resource on the unlicensed frequency.

[0567] Optionally, the frequency configuration information includes at least one of the following:

[0568] First frequency list, second frequency list, CAPC configuration information, and LBT configuration information;

[0569] The first frequency list includes licensed frequencies and unlicensed frequencies, and the unlicensed frequencies are marked with an unlicensed frequency identifier in the first frequency list;

[0570] The second frequency list includes unlicensed frequencies;

[0571] The CAPC configuration information includes the channel access priority of the Sidelink logical channel and / or the mapping relationship between the QoS identifier and the channel access priority.

[0572] The LBT configuration information includes the maximum number of LBT failures that can trigger a continuous LBT failure event.

[0573] Optionally, the unlicensed frequency identifier includes CAPC configuration information and / or LBT configuration information.

[0574] Optionally, the device 2700 further includes:

[0575] The first message receiving unit is configured to obtain the frequency configuration information based on system messages sent by the network-side device; and / or,

[0576] The second message receiving unit is configured to obtain the frequency configuration information based on the RRC reconfiguration message sent by the network-side device; and / or,

[0577] The third message receiving unit is configured to obtain the frequency configuration information based on the RRC reconfiguration message sent by the relay terminal, wherein the RRC reconfiguration message is sent by the network-side device to the relay terminal.

[0578] Regarding the apparatus 2700 in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated here.

[0579] Figure 28 This is a block diagram illustrating a communication device according to an exemplary embodiment. (Refer to...) Figure 28 The device 2800 is used in network-side equipment, and the device 2800 includes:

[0580] The first message sending module 2801 is configured to send frequency configuration information to the terminal, wherein the frequency configuration information is used to enable the terminal to determine the target Sidelink resource on the unlicensed frequency for Sidelink communication.

[0581] Optionally, the device 2800 further includes:

[0582] The first receiving module is configured to receive the first resource request sent by the terminal.

[0583] The first response module is configured to, in response to the first resource request, allocate a Sidelink resource on an unlicensed frequency to the terminal, so that the terminal determines the allocated Sidelink resource as the target Sidelink resource.

[0584] Optionally, the first resource request includes at least one of the following:

[0585] First destination terminal identifier, first logical channel identifier, and first unlicensed frequency identifier;

[0586] Wherein, the first destination terminal identifier is used to indicate that the data transmission frequency of the destination terminal is a Sidelink resource on an unlicensed frequency; the first logical channel identifier is used to indicate that the data transmission frequency of the logical channel is a Sidelink resource on an unlicensed frequency; and the first unlicensed frequency identifier is used to indicate that the Sidelink resource requested by the terminal is on an unlicensed frequency.

[0587] Optionally, the device 2800 further includes:

[0588] The second message sending module is configured to send a first resource pool to the terminal, wherein the first resource pool is used by the terminal to determine a target Sidelink resource on an unlicensed frequency from the first resource pool, and the first resource pool includes at least one candidate Sidelink resource on an unlicensed frequency.

[0589] Optionally, the first message sending module 2801 is specifically configured as follows:

[0590] The first resource pool is sent to the terminal via system message.

[0591] Optionally, the device 2800 further includes:

[0592] The second receiving module is configured to receive a second resource request sent by the terminal, wherein the second resource request is used to request the network-side device to allocate Sidelink resources for the terminal on a specified unlicensed frequency, and the specified unlicensed frequency is determined according to the frequency configuration information;

[0593] The second response module is configured to, in response to the second resource request, allocate Sidelink resources on the specified unlicensed frequency to the terminal, so that the terminal uses the allocated Sidelink resources as the target Sidelink resources.

[0594] Optionally, the second resource request includes at least one of the following:

[0595] Second destination terminal identifier, second logical channel identifier, transmission frequency identifier, and second unlicensed frequency identifier;

[0596] Wherein, the second destination terminal identifier is used to indicate that the data transmission frequency of the destination terminal is the Sidelink resource on the specified unlicensed frequency;

[0597] The second logical channel identifier is used to indicate that the data transmission frequency of the logical channel is the specified unlicensed frequency;

[0598] The transmission frequency identifier is used to indicate that at least one unlicensed frequency in the frequency configuration information is the designated unlicensed frequency;

[0599] The second unlicensed frequency identifier is used to indicate, when the transmission frequency of the data to be transmitted is an unlicensed frequency, that the Sidelink resource requested by the terminal is on the specified unlicensed frequency.

[0600] Optionally, when the frequency configuration information includes multiple frequency lists, the transmit frequency identifier includes:

[0601] A first identifier used to indicate the order of the plurality of frequency lists.

[0602] Optionally, if the frequency configuration information includes a multiple frequency list, and if the second resource request includes the second unlicensed frequency identifier, the transmission frequency identifier includes:

[0603] A second identifier is used to indicate a first target frequency list, wherein the first target frequency list is a frequency list in the plurality of frequency lists that carries unlicensed frequency resources corresponding to the second unlicensed frequency identifier;

[0604] or,

[0605] If the frequency configuration information includes multiple frequency lists, and the second resource request does not carry the second unauthorized frequency identifier, the transmitted frequency identifier includes:

[0606] A third identifier is used to indicate a second target frequency list, which is a list of frequencies carrying licensed frequencies among the plurality of frequency lists.

[0607] Optionally, the device 2800 further includes:

[0608] The third message sending module is configured to send a third resource pool to the terminal, wherein the third resource pool is used by the terminal to determine the target Sidelink resource based on the frequency configuration information and the third resource pool, wherein the third resource pool includes at least one candidate Sidelink resource on an unlicensed frequency.

[0609] Optionally, the third message sending module is specifically configured as follows:

[0610] The third resource pool is sent to the terminal via system message.

[0611] Optionally, the frequency configuration information includes at least one of the following:

[0612] First frequency list, second frequency list, CAPC configuration information, and LBT configuration information;

[0613] The first frequency list includes licensed frequencies and unlicensed frequencies, and the unlicensed frequencies are marked with an unlicensed frequency identifier in the first frequency list;

[0614] The second frequency list includes unlicensed frequencies;

[0615] The CAPC configuration information includes the channel access priority of the Sidelink logical channel and / or the mapping relationship between the QoS identifier and the channel access priority.

[0616] The LBT configuration information includes the maximum number of LBT failures that can trigger a continuous LBT failure event.

[0617] Optionally, the unlicensed frequency identifier includes CAPC configuration information and / or LBT configuration information.

[0618] Optionally, the first message sending module 2801 is specifically configured as follows:

[0619] The frequency configuration information is sent to the terminal via system messages; and / or,

[0620] The frequency configuration information is sent to the terminal via an RRC reconfiguration message; and / or

[0621] The frequency configuration information is sent to the terminal via an RRC reconfiguration message sent to the relay terminal, wherein the RRC reconfiguration message is forwarded to the terminal by the relay terminal.

[0622] Regarding the apparatus 2800 in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated here.

[0623] This disclosure also provides a computer-readable storage medium having stored thereon computer program instructions that, when executed by a processor, implement the steps of the communication method provided in this disclosure.

[0624] Figure 29 This is a block diagram illustrating a terminal according to an exemplary embodiment. For example, terminal 2900 may be a mobile phone, computer, digital broadcasting terminal, messaging device, game console, tablet device, medical device, fitness equipment, personal digital assistant, smart car, etc.

[0625] Reference Figure 29 The terminal 2900 may include one or more of the following components: a first processing component 2902, a first memory 2904, a first power supply component 2906, a multimedia component 2908, an audio component 2910, a first input / output interface 2912, a sensor component 2914, and a communication component 2916.

[0626] The first processing component 2902 typically controls the overall operation of the terminal 2900, such as operations associated with display, telephone calls, data communication, camera operation, and recording. The first processing component 2902 may include one or more first processors 2920 to execute instructions to complete all or part of the steps of the communication method described above. Furthermore, the first processing component 2902 may include one or more modules to facilitate interaction between the first processing component 2902 and other components. For example, the first processing component 2902 may include a multimedia module to facilitate interaction between the multimedia component 2908 and the first processing component 2902.

[0627] The first memory 2904 is configured to store various types of data to support operation on the terminal 2900. Examples of this data include instructions for any application or method operating on the terminal 2900, contact data, phonebook data, messages, pictures, videos, etc. The first memory 2904 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0628] The first power supply component 2906 provides power to various components of the terminal 2900. The first power supply component 2906 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the terminal 2900.

[0629] Multimedia component 2908 includes a screen that provides an output interface between the terminal 2900 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of the touch or swipe action but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 2908 includes a front-facing camera and / or a rear-facing camera. When the terminal 2900 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or the rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0630] Audio component 2910 is configured to output and / or input audio signals. For example, audio component 2910 includes a microphone (MIC) configured to receive external audio signals when terminal 2900 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in first memory 2904 or transmitted via communication component 2916. In some embodiments, audio component 2910 also includes a speaker for outputting audio signals.

[0631] The first input / output interface 2912 provides an interface between the first processing component 2902 and the peripheral interface module, which may be a keyboard, click wheel, buttons, etc. These buttons may include, but are not limited to, a home button, volume buttons, a start button, and a lock button.

[0632] Sensor assembly 2914 includes one or more sensors for providing state assessments of various aspects of terminal 2900. For example, sensor assembly 2914 can detect the on / off state of terminal 2900, the relative positioning of components such as the display and keypad of terminal 2900, changes in the position of terminal 2900 or a component of terminal 2900, the presence or absence of user contact with terminal 2900, the orientation or acceleration / deceleration of terminal 2900, and temperature changes of terminal 2900. Sensor assembly 2914 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 2914 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 2914 may also include an accelerometer, a gyroscope, a magnetometer, a pressure sensor, or a temperature sensor.

[0633] Communication component 2916 is configured to facilitate wired or wireless communication between terminal 2900 and other devices. Terminal 2900 can access wireless networks based on communication standards, such as WiFi, 2G, or 3G, or combinations thereof. In one exemplary embodiment, communication component 2916 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 2916 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0634] In an exemplary embodiment, the terminal 2900 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the communication method described above.

[0635] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a first memory 2904 including instructions, which can be executed by a first processor 2920 of a terminal 2900 to complete the aforementioned communication method. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0636] In another exemplary embodiment, a computer program product is also provided, the computer program product comprising a computer program executable by a programmable device, the computer program having a code portion for performing the above-described communication method when executed by the programmable device.

[0637] Figure 30 This is a block diagram illustrating a network-side device according to an exemplary embodiment. For example, the network-side device 3000 may be provided as a base station. (Refer to...) Figure 30 The network-side device 3000 includes a second processing component 3022, which further includes one or more processors, and memory resources represented by a second memory 3032 for storing instructions, such as application programs, that can be executed by the second processing component 3022. The application programs stored in the second memory 3032 may include one or more modules, each corresponding to a set of instructions. Furthermore, the second processing component 3022 is configured to execute instructions to perform communication methods.

[0638] The network-side device 3000 may also include a second power supply component 3026 configured to perform power management of the network-side device 3000, a wired or wireless network interface 3050 configured to connect the network-side device 3000 to a network, and a second input / output interface 3058. The network-side device 3000 can operate on an operating system stored in memory 3032, such as Windows Server™, Mac OS X™, Unix™, Linux™, FreeBSD™, or similar.

[0639] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of this disclosure. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0640] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A communication method, characterized in that, Applied to a terminal, the method includes: Determine a target Sidelink resource on an unlicensed frequency, wherein the target Sidelink resource is requested by the terminal from the network-side device, and / or determined by the terminal itself; Perform Sidelink communication on the target Sidelink resource; The determination of the target Sidelink resource on the unlicensed frequency includes: It is confirmed that the frequency configuration information sent by the network-side device has been received; The frequency configuration information includes at least one of the following: A first frequency list, comprising licensed frequencies and unlicensed frequencies, wherein unlicensed frequencies are marked in the first frequency list by an unlicensed frequency identifier, the unlicensed frequency identifier comprising: CAPC configuration information and / or LBT configuration information; A second frequency list, which includes unlicensed frequencies; The CAPC configuration information includes the channel access priority of the Sidelink logical channel and / or the mapping relationship between the QoS identifier and the channel access priority. The LBT configuration information includes the maximum number of LBT failures that trigger a continuous LBT failure event; If the unlicensed frequency that the terminal wants to request is not in the first frequency list and / or the second frequency list issued by the network-side device, a sidelink resource is randomly selected from the pre-configured fourth resource pool as the target sidelink resource, or an idle sidelink resource in the fourth resource pool is selected as the target sidelink resource, wherein the fourth resource pool includes at least one candidate sidelink resource on the unlicensed frequency.

2. The communication method according to claim 1, characterized in that, The frequency configuration information is obtained through at least one of the following methods: The frequency configuration information is obtained based on the system messages sent by the network-side devices; The frequency configuration information is obtained based on the RRC reconfiguration message sent by the network-side device; The frequency configuration information is obtained based on the RRC reconfiguration message sent by the relay terminal, wherein the RRC reconfiguration message is sent by the network-side device to the relay terminal.

3. A communication method, characterized in that, Applied to network-side devices, the method includes: Frequency configuration information is sent to the terminal, wherein the frequency configuration information is used to enable the terminal to determine a target Sidelink resource on an unlicensed frequency for Sidelink communication, wherein the target Sidelink resource is requested by the terminal from the network-side device, and / or determined by the terminal itself; The frequency configuration information includes at least one of the following: A first frequency list, comprising licensed frequencies and unlicensed frequencies, wherein unlicensed frequencies are marked in the first frequency list by an unlicensed frequency identifier, the unlicensed frequency identifier comprising: CAPC configuration information and / or LBT configuration information; A second frequency list, which includes unlicensed frequencies; The CAPC configuration information includes the channel access priority of the Sidelink logical channel and / or the mapping relationship between the QoS identifier and the channel access priority. The LBT configuration information includes the maximum number of LBT failures that trigger a continuous LBT failure event; The frequency configuration information is further used to enable the terminal to randomly select a Sidelink resource from a pre-configured fourth resource pool as the target Sidelink resource when it determines that the unlicensed frequency to be requested is not in the first frequency list and / or the second frequency list, or to select an idle Sidelink resource in the fourth resource pool as the target Sidelink resource, wherein the fourth resource pool includes at least one candidate Sidelink resource on the unlicensed frequency.

4. The communication method according to claim 3, characterized in that, Sending frequency configuration information to the terminal includes: The frequency configuration information is sent to the terminal via system messages; and / or, The frequency configuration information is sent to the terminal via an RRC reconfiguration message; and / or The frequency configuration information is sent to the terminal via an RRC reconfiguration message sent to the relay terminal, wherein the RRC reconfiguration message is forwarded to the terminal by the relay terminal.

5. A communication device, characterized in that, Applied to a terminal, the device includes: The determination module is configured to determine a target Sidelink resource on an unlicensed frequency, wherein the target Sidelink resource is requested by the terminal from the network-side device, and / or determined by the terminal itself; The determination of the target Sidelink resource on the unlicensed frequency includes: It is confirmed that the frequency configuration information sent by the network-side device has been received; The frequency configuration information includes at least one of the following: A first frequency list, comprising licensed frequencies and unlicensed frequencies, wherein unlicensed frequencies are marked in the first frequency list by an unlicensed frequency identifier, the unlicensed frequency identifier comprising: CAPC configuration information and / or LBT configuration information; A second frequency list, which includes unlicensed frequencies; The CAPC configuration information includes the channel access priority of the Sidelink logical channel and / or the mapping relationship between the QoS identifier and the channel access priority. The LBT configuration information includes the maximum number of LBT failures that trigger a continuous LBT failure event; If the unlicensed frequency that the terminal wants to request is not in the first frequency list and / or the second frequency list issued by the network-side device, a sidelink resource is randomly selected from the pre-configured fourth resource pool as the target sidelink resource, or an idle sidelink resource in the fourth resource pool is selected as the target sidelink resource, wherein the fourth resource pool includes at least one candidate sidelink resource on the unlicensed frequency.

6. A communication device, characterized in that, Applied to network-side devices, the device includes: The sending module is configured to send frequency configuration information to the terminal, wherein the frequency configuration information is used to enable the terminal to determine a target Sidelink resource on an unlicensed frequency for Sidelink communication, wherein the target Sidelink resource is requested by the terminal from the network-side device, and / or determined by the terminal itself. The frequency configuration information includes at least one of the following: A first frequency list, comprising licensed frequencies and unlicensed frequencies, wherein unlicensed frequencies are marked in the first frequency list by an unlicensed frequency identifier, the unlicensed frequency identifier comprising: CAPC configuration information and / or LBT configuration information; A second frequency list, which includes unlicensed frequencies; The CAPC configuration information includes the channel access priority of the Sidelink logical channel and / or the mapping relationship between the QoS identifier and the channel access priority. The LBT configuration information includes the maximum number of LBT failures that trigger a continuous LBT failure event; The frequency configuration information is further used to enable the terminal to randomly select a Sidelink resource from a pre-configured fourth resource pool as the target Sidelink resource when it determines that the unlicensed frequency to be requested is not in the first frequency list and / or the second frequency list, or to select an idle Sidelink resource in the fourth resource pool as the target Sidelink resource, wherein the fourth resource pool includes at least one candidate Sidelink resource on the unlicensed frequency.

7. A terminal, characterized in that, include: First processor; A first memory for storing instructions executable by a first processor; The first processor is configured to execute the executable instructions to implement the communication method as described in claim 1 or 2.

8. A network-side device, characterized in that, include: Second processor; A second memory used to store instructions executable by a second processor; The second processor is configured to execute the executable instructions to implement the communication method as described in claim 3 or 4.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processing device, it implements the steps of the communication method according to claim 1 or 2, or the steps of the communication method according to claim 3 or 4.

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