WO2024007330A1

WO2024007330A1 - Communication method and apparatus, storage medium, terminal, and network side device

Info

Publication number: WO2024007330A1
Application number: PCT/CN2022/104731
Authority: WO
Inventors: 杨星
Original assignee: 北京小米移动软件有限公司
Priority date: 2022-07-08
Filing date: 2022-07-08
Publication date: 2024-01-11
Also published as: CN115299170A

Abstract

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

Communication method, device, storage medium, terminal and network side equipment

Technical field

The present disclosure relates to the field of communication technology, and in particular, to a communication method, device, storage medium, terminal and network side equipment.

Background technique

With the development of wireless communication technology, mobile communication networks are gradually evolving towards 5G NR (New Radio, New Radio) system. In the 5G NR system, Sidelink (direct link) technology is introduced, that is, user terminals (User Equipment, UE) communicate directly through wireless resources. With the widespread application of Sidelink communication, how to optimize related technologies of Sidelink communication has become an increasingly important technical issue.

Contents of the invention

In order to overcome problems existing in related technologies, the present disclosure provides a communication method, device, storage medium, terminal and network side equipment.

According to a first aspect of an embodiment of the present disclosure, a communication method is provided, applied to a terminal, and the method includes:

Determine target Sidelink resources on unlicensed frequencies;

Sidelink communication is performed on the target Sidelink resource.

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

Send a first resource request to the network side device, where the first resource request is used to request the network side device to allocate Sidelink resources on an unlicensed frequency to the terminal;

The Sidelink resource allocated by the network side device is determined as the target Sidelink resource.

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

First destination terminal identification;

First logical channel identifier;

First unlicensed frequency identification;

Wherein, the first destination terminal identifier is used to indicate that the data sending frequency of the destination terminal is Sidelink resources on an unlicensed frequency; the first logical channel identifier is used to indicate that the data sending frequency of the logical channel is on an unlicensed frequency. Sidelink resource; the first unlicensed frequency identifier is used to indicate that the Sidelink resource requested by the terminal is on an unlicensed frequency.

The target Sidelink resource is determined from a first resource pool delivered by a network side device, where the first resource pool includes at least one candidate Sidelink resource on an unlicensed frequency.

Optionally, before determining the target Sidelink resource from the first resource pool delivered by the network side device, the method further includes:

The first resource pool is obtained according to the system message sent by the network side device.

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

Send a second resource request to the network side device, where the second resource request is used to request the network side device to allocate Sidelink resources on a designated unlicensed frequency to the terminal;

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

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

Receive frequency configuration information sent by the network side device;

The specified unlicensed frequency is determined in the frequency configuration information.

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

Second destination terminal identification;

second logical channel identifier;

Send frequency identification;

Second unlicensed frequency identification;

Wherein, the second destination terminal identification is used to indicate that the data sending frequency of the destination terminal is the Sidelink resource on the designated unlicensed frequency;

The second logical channel identifier is used to indicate that the data transmission frequency of the logical channel is the designated unlicensed frequency;

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

The second unlicensed frequency identifier is used to indicate, through the second unlicensed frequency identifier, that the Sidelink resource requested by the terminal is at the specified unlicensed frequency when the transmission frequency of the data to be sent is an unlicensed frequency.

Optionally, in the case where the frequency configuration information includes multiple frequency lists, the transmission frequency identification includes:

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

Optionally, in the case where the frequency configuration information includes multiple frequency lists, if the second resource request includes the second unlicensed frequency identification, the sending frequency identification includes:

A second identifier used to indicate a first target frequency list, the first target frequency list being a frequency list carrying an unlicensed frequency corresponding to the second unlicensed frequency identifier among the plurality of frequency lists;

or,

In the case where the frequency configuration information includes multiple frequency lists, if the second resource request does not carry the second unlicensed frequency identifier, the transmission frequency identifier includes:

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

The target Sidelink resource is determined according to the frequency configuration information delivered by the network side device and a third resource pool, where the third resource pool includes at least one candidate Sidelink resource on an unlicensed frequency.

Optionally, before determining the target Sidelink resource according to the frequency configuration information issued by the network side device and the third resource pool, the method further includes:

The third resource pool is obtained according to the system message sent by the network side device.

When the unlicensed frequency to be requested by the terminal is not in the frequency configuration information issued by the network side device, the target Sidelink resource is determined from a preconfigured fourth resource pool, where the fourth resource pool includes At least one candidate Sidelink resource on an unlicensed frequency.

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

First frequency list;

Second frequency list;

CAPC configuration information;

LBT configuration information;

Wherein, the first frequency list includes authorized frequencies and unlicensed frequencies, and the unlicensed frequency is marked in the first frequency list by an unlicensed frequency identifier;

the second frequency list 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.

Optionally, the unlicensed frequency identification includes CAPC configuration information and/or LBT configuration information.

Optionally, the frequency configuration information is obtained by at least one of the following methods:

Obtain the frequency configuration information according to the system message sent by the network side device;

Obtain the frequency configuration information according to the RRC reconfiguration message sent by the network side device;

The frequency configuration information is obtained according to an RRC reconfiguration message sent by a relay terminal, where the RRC reconfiguration message is sent by a network side device to the relay terminal.

According to a second aspect of the embodiment of the present disclosure, a communication method is provided, applied to a network side device, and the method includes:

Frequency configuration information is sent to the terminal, where the frequency configuration information is used to enable the terminal to determine target Sidelink resources on the unlicensed frequency for Sidelink communication.

Optionally, the method also includes:

Receive the first resource request sent by the terminal;

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

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

First destination terminal identification;

First logical channel identifier;

First unlicensed frequency identification;

Optionally, the method also includes:

Send a first resource pool to the terminal, where the first resource pool is used by the terminal to determine target Sidelink resources on the unlicensed frequency from the first resource pool, where the first resource pool includes at least A candidate Sidelink resource on an unlicensed frequency.

Optionally, sending the first resource pool to the terminal includes:

Send the first resource pool to the terminal through a system message.

Optionally, the method also includes:

Receive a second resource request sent by the terminal, where the second resource request is used to request the network side device to allocate Sidelink resources on a designated unlicensed frequency to the terminal, and the designated unlicensed frequency is based on the The frequency configuration information is determined;

In response to the second resource request, allocate Sidelink resources on the designated unlicensed frequency to the terminal, so that the terminal uses the allocated Sidelink resources as the target Sidelink resources.

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

Second destination terminal identification;

second logical channel identifier;

Send frequency identification;

Second unlicensed frequency identification;

A second identifier used to indicate a first target frequency list, where the first target frequency list is a frequency list among the plurality of frequency lists that carries an unlicensed frequency resource corresponding to the second unlicensed frequency identifier;

or,

Optionally, the method also includes:

Send a third resource pool to the terminal, where the third resource pool is used by the terminal to determine the target Sidelink resource according to the frequency configuration information and the third resource pool, where the third resource The pool includes at least one candidate Sidelink resource on an unlicensed frequency.

Optionally, sending the third resource pool to the terminal includes:

Send the third resource pool to the terminal through a system message.

First frequency list;

Second frequency list;

CAPC configuration information;

LBT configuration information;

the second frequency list includes unlicensed frequencies;

Optionally, sending frequency configuration information to the terminal includes:

Send the frequency configuration information to the terminal through a system message; and/or,

Send the frequency configuration information to the terminal through an RRC reconfiguration message; and/or,

The frequency configuration information is sent to the terminal through an RRC reconfiguration message sent to the relay terminal, where the RRC reconfiguration message is forwarded to the terminal through the relay terminal.

According to a third aspect of the embodiment of the present disclosure, a communication device is provided, applied to a terminal, and the device includes:

a determination module configured to determine target Sidelink resources on the unlicensed frequency;

A communication module configured to perform Sidelink communication on the target Sidelink resource.

According to a fourth aspect of the embodiment of the present disclosure, a communication device is provided, which is applied to network side equipment. The device includes:

The sending module is configured to send frequency configuration information to the terminal, where the frequency configuration information is used to enable the terminal to determine target Sidelink resources on the unlicensed frequency for Sidelink communication.

According to a fifth aspect of the embodiment of the present disclosure, a terminal is provided, including:

first processor;

a first memory for storing instructions executable by the first processor;

Wherein, the first processor is configured to execute the executable instructions to implement the communication method described in the first aspect.

According to a sixth aspect of an embodiment of the present disclosure, a network side device is provided, including:

second processor;

a second memory for storing instructions executable by the second processor;

Wherein, the second processor is configured to execute the executable instructions to implement the communication method described in the second aspect.

According to a seventh aspect of the embodiment of the present disclosure, there is provided a computer-readable storage medium on which computer program instructions are stored. When the program instructions are executed by a processor, the communication method provided by the first or second aspect of the present disclosure is implemented. A step of.

The technical solution provided by the embodiments of the present disclosure can include the following beneficial effects: the terminal can expand the frequency resources available for Sidelink by determining the target unlicensed frequency resource for Sidelink communication and performing Sidelink communication on the target unlicensed frequency resource. To provide large-bandwidth, low-latency Sidelink communication links.

It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only, and do not limit the present disclosure.

Description of the drawings

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

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

Figure 2 is a flowchart of a communication method according to some embodiments.

Figure 3 is a flowchart of a communication method according to other embodiments.

Figure 4 is a communication sequence diagram illustrating a communication method according to some embodiments.

Figure 5 is a flowchart of a communication method according to further embodiments.

Figure 6 is a flow chart of a communication method according to other embodiments.

Figure 7 is a flowchart of a communication method according to further embodiments.

FIG. 8 is a communication sequence diagram of a communication method according to some embodiments.

Figure 9 is a flowchart of a communication method according to other embodiments.

Figure 10 is a flowchart of a communication method according to further embodiments.

Figure 11 is a flow chart of a communication method according to other embodiments.

Figure 12 is a flowchart of a communication method according to further embodiments.

Figure 13 is a communication sequence diagram illustrating a communication method according to some embodiments.

Figure 14 is a flowchart of a communication method according to other embodiments.

Figure 15 is a flowchart of a communication method according to further embodiments.

Figure 16 is a flowchart of a communication method according to some embodiments.

Figure 17 is a flowchart of a communication method according to further embodiments.

Figure 18 is a flowchart of a communication method according to further embodiments.

Figure 19 is a flow chart of a communication method according to other embodiments.

Figure 20 is a flowchart of a communication method according to further embodiments.

Figure 21 is a flowchart of a communication method according to other embodiments.

Figure 22 is a flowchart of a communication method according to further embodiments.

Figure 23 is a flowchart of a communication method according to further embodiments.

Figure 24 is a flowchart of a communication method according to further embodiments.

Figure 25 is a flowchart of a communication method according to further embodiments.

Figure 26 is a flowchart of a communication method according to further embodiments.

Figure 27 is a block diagram of a communication device according to an exemplary embodiment.

Figure 28 is a block diagram of a communication device according to an exemplary embodiment.

Figure 29 is a block diagram of a terminal according to an exemplary embodiment.

Figure 30 is a block diagram of a network side device according to an exemplary embodiment.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with aspects of the disclosure as detailed in the appended claims.

In the related technology, the network side device carries a frequency list in the system message (SIB12), and each element in the frequency list is the Sidelink resource configuration on the corresponding frequency. Among them, Sidelink resource configuration includes frequency location, Sidelink sending resource pool and Sidelink receiving resource pool. However, the frequency resources in this frequency list are only frequency resources on authorized frequencies.

In order to expand the frequency resources available for Sidelink, the present disclosure proposes a communication method. The method includes a terminal determining a target Sidelink resource on an unlicensed frequency, and performing Sidelink communication on the target Sidelink resource.

Figure 1 is a structural diagram of a network system illustrating a communication method according to some embodiments. As shown in Figure 1, it includes a first terminal 11, a second terminal 12 and a network side device 13. Among them, the first terminal 11 and the second terminal 12 can communicate through the PC5 interface and use Sidelink. The network side device 13 and the terminal (including the first terminal 11 and the second terminal 12) can communicate through the air interface (Uu) interface and using uplink and downlink.

Among them, the first terminal 11 and the second terminal 12 are user terminals (User Equipment, UE) or other terminal-side devices, such as: mobile phones, tablet computers (Tablet Personal Computer), laptop computers (Laptop Computer), personal digital assistants (Personal Digital Assistant, PDA), Mobile Internet Device (Mobile Internet Device, MID), Wearable Device (Wearable Device), smart cars, vehicle-mounted equipment or robots and other terminal-side devices. It is worth noting that in this disclosure, the specific type of terminal is not limited.

The network side device may be a base station, which is a device deployed in the access network to provide wireless communication functions for terminals. The base station may be the base station of the terminal's serving cell or the base station of a cell adjacent to the terminal's serving cell. Base stations can include various forms of macro base stations, micro base stations, relay stations, access points, transmission and reception points (Transmission Reception Point, TRP), etc. In systems using different wireless access technologies, the names of equipment with base station functions may be different. In the 5G New Radio (NR, New Radio) system, it is called gNodeB or gNB. As communication technology evolves, the name "base station" may describe changes. The network side device can also be a location management function entity (Location Management Function, LMF).

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

Figure 2 is a flowchart of a communication method according to some embodiments. As shown in Figure 2, this communication method can be used in a terminal and includes the following steps.

In step 210, target Sidelink resources on unlicensed frequencies are determined.

Here, Sidelink resources may include Sidelink sending resources and/or Sidelink receiving resources. The target Sidelink resource may be at least one Sidelink transmit resource and/or Sidelink receive resource on an unlicensed frequency.

The target Sidelink resource may 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. Wherein, when the bandwidth of the terminal on the licensed frequency is limited, the terminal can determine at least one Sidelink resource on the unlicensed frequency as the target Sidelink resource.

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

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

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.

Based on the target Sidelink resource, the terminal can use the target Sidelink resource to perform Sidelink communication with the destination terminal. Among them, Sidelink communication can be through Sidelink direct link communication, or through Sidelink indirect link communication. Sidelink direct link communication means that two terminals directly communicate with each other without passing through a relay terminal. Sidelink indirect link means that two terminals communicate with each other through at least one relay terminal.

Therefore, by determining the target Sidelink resource on the unlicensed frequency and performing Sidelink communication on the target Sidelink resource, the terminal can expand the frequency resources available for Sidelink to provide a large-bandwidth, low-latency Sidelink communication link.

Figure 3 is a flowchart of a communication method according to other embodiments. As shown in Figure 3, this communication method can be used in a terminal and includes the following steps.

In step 310, a first resource request is sent to the network side device, where the first resource request is used to request the network side device to allocate Sidelink resources on an unlicensed frequency to the terminal.

Here, the terminal may send a first resource request to the network side device, where the first resource request is used to request the network side device to allocate Sidelink resources on an unlicensed frequency to the terminal. For relevant descriptions of Sidelink resources, reference may be made to the description of step 210 in the embodiment shown in FIG. 2 , which will not be described again here.

In some embodiments, the first resource request may be carried through a SidelinkUEInformation message.

When the terminal is in the connected state, the terminal may send a first resource request to the network side device, and the network side device responds to the first resource request and allocates Sidelink resources on the unlicensed frequency to the terminal according to the first preset rule.

It is worth noting that the network side device allocates Sidelink resources on unlicensed frequencies to the terminal according to the first preset rule. This may mean that the network side device determines at least one unlicensed frequency from the unlicensed frequencies that it can support, and determines at least one unlicensed frequency. Determine at least one Sidelink resource in the at least one unlicensed frequency, and allocate the at least one Sidelink resource to the terminal. The Sidelink resources allocated by the network side device on the unlicensed frequency can be dynamic, that is, at least one Sidelink resource can be dynamically selected and allocated to the terminal based on the Sidelink resources on the unlicensed frequency that the network side device can support.

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

Here, the terminal responds to the Sidelink resource allocation information sent by the network side device and determines the Sidelink resource on the unlicensed frequency allocated by the network side device as the target Sidelink resource. The Sidelink resource allocation information carries Sidelink resources on the unlicensed frequency allocated by the network side device.

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

Figure 4 is a communication sequence diagram illustrating a communication method according to some embodiments. As shown in Figure 4, 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 the unlicensed frequency to the terminal. The network side device may respond to the first resource request. The resource request determines at least one unlicensed frequency from the unlicensed frequencies it can support, and determines at least one Sidelink resource in the at least one unlicensed frequency. The network side device sends Sidelink resource allocation information to the terminal, and the terminal receives the Sidelink resource allocation information and obtains the target Sidelink resource. The Sidelink resource allocation information carries Sidelink resources on the unlicensed frequency allocated by the network side device.

Therefore, the terminal sends a first resource request to the network side device, so that the network side device responds to the first resource request and allocates Sidelink resources on the unlicensed frequency to the terminal, and the terminal allocates the Sidelink resources allocated by the network side device on the unlicensed frequency. The Sidelink resource on the frequency is determined as the target Sidelink resource for Sidelink communication, so that Sidelink communication can be performed on the target Sidelink resource, which can expand the frequency resources available for Sidelink to provide a large-bandwidth, low-latency Sidelink communication link.

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

The first destination terminal identification; the first logical channel identification; the first unlicensed frequency identification.

It is worth explaining that the destination terminal refers to the peer terminal with which the terminal performs Sidelink communication. As shown in FIG. 1 , the second terminal 12 is the destination terminal of the first terminal 11 . By carrying the first target terminal identifier in the first resource request, it can be indicated that the data transmission frequency used by the target terminal in Sidelink communication is a Sidelink resource on an unlicensed frequency. By carrying the 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 resources requested by the terminal from the network side device are 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 Sidelink resources on the unlicensed frequency. The network side device allocates the unlicensed frequency to the terminal based on the first unlicensed identifier. Sidelink resources.

Figure 5 is a flowchart of a communication method according to further embodiments. As shown in Figure 5, this communication method can be used in a terminal and includes the following steps.

Step 510, determine whether the network side device sends frequency configuration information to the terminal;

Step 520: When the network side device has sent frequency configuration information, determine whether the terminal is in a connected state;

Step 530: When the terminal is in the connected state, send the first resource request to the network side device;

Step 540: Determine the Sidelink resources on the unlicensed frequency allocated by the network side device as the target Sidelink resources;

Step 550: Perform Sidelink communication on the target Sidelink resource.

Here, in step 510, the terminal may 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 determines whether the network side device sends frequency configuration information to the terminal. The result can be determined based on whether the terminal receives 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.

The frequency configuration information is used to enable the terminal to determine target Sidelink resources on unlicensed frequencies for Sidelink communication.

In some embodiments, the frequency configuration information can be obtained according to a system message sent by a network side device. The system message sent by the network side device carries frequency configuration information.

In some embodiments, the frequency configuration information can be obtained according to an RRC reconfiguration message sent by a network side device. The RRC reconfiguration message sent by the network side device carries frequency configuration information.

In some embodiments, the frequency configuration information can be obtained according to an RRC reconfiguration message sent by a relay terminal, where the RRC reconfiguration message is sent by a network side device to the relay terminal. It should be understood that the network side device sends an RRC reconfiguration message to the relay terminal, and the relay terminal forwards the RRC reconfiguration message to the terminal. The RRC message carries frequency configuration information. Among them, the RRC reconfiguration message may be a Sidelink RRC reconfiguration message.

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

First frequency list; second frequency list; CAPC configuration information; LBT configuration information.

Wherein, the first frequency list includes licensed frequencies and unlicensed frequencies, and the unlicensed frequencies are marked in the first frequency list by an unlicensed frequency identifier. The second frequency list 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.

Here, the first frequency list may include authorized frequencies and unlicensed frequencies that the network side device can support. In the first frequency list, the unlicensed frequencies may be marked with an unlicensed frequency identifier to distinguish the unlicensed frequencies from the licensed frequencies in the first frequency list. For example, for an unlicensed frequency in the first frequency list, an unlicensed frequency identifier similar to "unlicensed" may be carried.

Of course, in other implementations, the unlicensed frequency identification may be CAPC configuration information and/or LBT configuration information. That is, in the first frequency list, the unlicensed frequency in the first frequency list is marked by the CAPC configuration information and/or the LBT configuration information corresponding to the unlicensed frequency.

It should be understood that both the authorized frequencies and the unlicensed frequencies in the first frequency list can be frequency resources used for Sidelink communication. The frequency resources can include: the Sidelink destination address of the destination terminal, the transmission mode, and QoS (Quality of Service). , quality of service), at least one of data sending frequency and data receiving frequency. The transmission method may include one of unicast, multicast and broadcast.

The second frequency list includes unlicensed frequencies that the network side device can support. Among them, the unlicensed frequencies in the second frequency list can all be unlicensed frequencies used for Sidelink communication. The unlicensed frequencies can include: the Sidelink destination address of the destination terminal, the transmission method, and QoS (Quality of Service). , at least one of a data sending frequency and a data receiving frequency. The transmission method may include one of unicast, multicast and broadcast.

CAPC (Channel Access Priority Class, channel access priority) 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 is used to indicate the corresponding QoS standard value. For example, in 5G communication technology, the QoS identifier may be 5QI, and the mapping relationship may be the mapping relationship between 5QI and CAPC.

It is worth noting that when a terminal performs channel access on an unlicensed frequency, it needs to determine whether it can access based on the channel access priority. The channel access priority is determined based on the priority of the logical channel to send data. of. Therefore, through the CAPC configuration information, the channel access priority and/or the mapping relationship between the QoS identifier and the channel access priority of the Sidelink logical channel can be obtained, so that the corresponding channel can be determined when performing channel access. Access priority.

LBT (Listen Before Talk) configuration information includes the maximum number of LBT failures that trigger a continuous LBT failure event. Among them, when a terminal performs Sidelink transmission on an unlicensed frequency, it needs to implement an LBT mechanism to avoid interference while taking into account fairness between different terminals. After the LBT is successful, the terminal uses the unlicensed frequency for Sidelink transmission. Through the LBT configuration information, the terminal can perform the LBT mechanism on unlicensed frequencies.

In other embodiments, the unlicensed frequency identifier in the first frequency list may include CAPC configuration information and/or LBT configuration information. That is, in the first frequency list, unlicensed frequencies are marked through CAPC configuration information and/or LBT configuration information.

It is worth noting that in step 520, when the terminal receives the 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 the frequency configuration information, it means that the network side device does not support allocating Sidelink resources on unlicensed frequencies for Sidelink communication to the terminal.

In step 520, when the network side device has sent frequency configuration information, the terminal further determines whether the terminal is in a connected state. In step 530, when the terminal is in the connected state, the terminal sends a first resource request to the network side device for requesting the network side device to allocate Sidelink resources on the unlicensed frequency to the terminal, so that the network side device responds The first resource request is to allocate Sidelink resources on an unlicensed frequency to the terminal according to a first preset rule. In some embodiments, the first resource request may be carried through a SidelinkUEInformation message. Regarding how the network side device allocates Sidelink resources on the unlicensed frequency to the terminal according to the first preset rule, reference may be made to the relevant description of step 310 in the embodiment shown in FIG. 3, which will not be described again here.

In step 540, the terminal responds to the Sidelink resource allocation information sent by the network side device and determines the unlicensed frequency resource allocated by the network side device as the target unlicensed frequency resource. The allocation information is information sent by the network side device for allocating unlicensed frequency resources to the terminal.

In step 550, the terminal responds to the Sidelink resource allocation information sent by the network side device and determines the Sidelink resource on the unlicensed frequency allocated by the network side device as the target Sidelink resource. The Sidelink resource allocation information carries Sidelink resources on the unlicensed frequency allocated by the network side device.

Therefore, when the network side device has sent the frequency configuration information to the terminal, if the terminal is in the connected state, the terminal sends the first resource request to the network side device, so that the network side device responds to the first resource request, as The terminal allocates Sidelink resources on the unlicensed frequency. The terminal determines the Sidelink resource on the unlicensed frequency allocated by the network side device as the target Sidelink resource for Sidelink communication, so as to perform Sidelink communication on the target Sidelink resource, which can be expanded. Frequency resources available for Sidelink to provide large-bandwidth, low-latency Sidelink communication links.

Figure 6 is a flow chart of a communication method according to other embodiments. As shown in Figure 6, this communication method can be used in a terminal and includes the following steps.

In step 610, target Sidelink resources are determined from a first resource pool delivered by the network side device, where the first resource pool includes at least one candidate Sidelink resource on an unlicensed frequency.

Here, the first resource pool is sent by the network side device to the terminal, and the first resource pool includes at least one candidate Sidelink resource on an unlicensed frequency. Wherein, at least one Sidelink resource included in the first resource pool may be a Sidelink resource on an unlicensed frequency that the network side device can support.

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

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

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

Therefore, the terminal determines the target Sidelink resource for Sidelink communication in the first resource pool and performs Sidelink communication on the target Sidelink resource. This not only expands the available frequency resources of Sidelink to provide large bandwidth and low latency. Sidelink communication link, and even if the terminal is in idle or inactive state, the terminal can request the target Sidelink resource on the unlicensed frequency.

Figure 7 is a flowchart of a communication method according to further embodiments. As shown in Figure 7, this communication method can be used in a terminal and includes the following steps.

In step 710, the first resource pool is obtained according to the system message sent by the network side device.

Here, the terminal may receive a system message sent by the network side device, where the system message carries the first resource pool, and the terminal obtains the first resource pool according to the system message. The first resource pool includes at least one candidate Sidelink resource on an unlicensed frequency.

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 may be broadcast by the network side device to the terminal when the terminal communicates with the network side device. That is, when the terminal device communicates with the network side device, the network side device broadcasts the latest first resource pool to the terminal. When the terminal is in an idle state or an inactive state, the first resource pool is also stored on the terminal.

In step 720, target Sidelink resources are determined from the first resource pool delivered by the network side device.

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.

It is worth noting that when the terminal is in the idle state or inactive state, since there is no communication between the terminal and the network side device, at this time, the terminal can determine the target Sidelink resource on the unlicensed frequency from the first resource pool. Of course, when the terminal is in the connected state, the terminal can also determine the target Sidelink resource in the first resource pool.

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

FIG. 8 is a communication sequence diagram of a communication method according to some embodiments. As shown in Figure 8, when the terminal communicates with the network side device, the terminal receives the system message sent by the network side device. The system message carries the first resource pool. When the terminal is in an idle state, an inactive state, or a connected state, the terminal determines the target Sidelink resource on the unlicensed frequency in the first resource pool.

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 of Sidelink to provide Large-bandwidth, low-latency Sidelink communication link, and even if the terminal is in idle or inactive state, the terminal can request the target Sidelink resource.

Figure 9 is a flowchart of a communication method according to other embodiments. As shown in Figure 9, this communication method can be used in a terminal and includes the following steps.

Step 910, determine whether the network side device sends frequency configuration information to the terminal;

Step 920: When the network side device has sent frequency configuration information, determine whether the terminal is in a connected state;

Step 930: When the terminal is in the idle state or inactive state, determine the target Sidelink resource from the first resource pool issued by the network side device, where the first resource pool includes at least one candidate on the unlicensed frequency. Sidelink resources;

Step 940: Perform Sidelink communication on the target Sidelink resource.

Here, the terminal may 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 determines whether the network side device sends the frequency configuration information to the terminal based on whether the terminal receives 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.

In some embodiments, the frequency configuration information can be obtained according to an RRC reconfiguration message sent by a relay terminal, where the RRC reconfiguration message is sent by a network side device to the relay terminal. Among them, the RRC reconfiguration message may be a Sidelink RRC reconfiguration message.

It should be understood that the network side device sends an RRC reconfiguration message to the relay terminal, and the relay terminal forwards the RRC reconfiguration message to the terminal. The RRC message carries frequency configuration information.

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

For specific definitions of the first frequency list, the second frequency list, CAPC configuration information, and LBT configuration information, reference may be made to the relevant description of the embodiment shown in FIG. 5 , which will not be described again here.

It is worth noting that when the terminal receives the frequency configuration information, it means that the network side device supports allocating Sidelink resources on unlicensed frequencies for Sidelink communication to the terminal. When the terminal does not receive the frequency configuration information, it means that the network side device does not support allocating Sidelink resources at unlicensed frequencies for Sidelink communication to the terminal. It should be understood that for the relevant meaning of the Sidelink resource, reference may be made to the relevant description of step 210 in the embodiment shown in FIG. 2 .

Wherein, when the network side device has sent the frequency configuration information, the terminal further determines whether the terminal is in the connected state, and when the terminal is in the idle state or inactive state, the terminal sends the first resource pool from the network side device. Target Sidelink resources on the unlicensed frequency are determined, wherein the first resource pool includes at least one candidate Sidelink resource on the unlicensed frequency.

It is worth noting that when the terminal is in the idle state or inactive state, regardless of whether the unlicensed frequency to be requested by the terminal is in the frequency configuration information, the unlicensed frequency is determined from the first resource pool issued by the network side device. Target Sidelink resource on frequency.

The first resource pool may be sent by the network side device to the terminal through a system message, and the system message carries the first resource pool. The terminal may select at least one Sidelink resource from the first resource pool as the target Sidelink resource according to the second preset rule.

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.

Therefore, when the network side device has sent frequency configuration information to the terminal, if the terminal is in the idle state or inactive state, the terminal determines the target on the unlicensed frequency for Sidelink communication in the first resource pool. Sidelink resource to perform Sidelink communication on this target Sidelink resource. Not only can the available frequency resources of Sidelink be expanded to provide large-bandwidth, low-latency Sidelink communication links, but also the terminal can request target Sidelink resources on unlicensed frequencies even if the terminal is in idle or inactive state.

Figure 10 is a flowchart of a communication method according to further embodiments. As shown in Figure 10, this communication method can be used in a terminal and includes the following steps.

In step 1010, the target Sidelink resource is determined from a second resource pool preconfigured by the terminal, where the second resource pool includes at least one candidate Sidelink resource on an unlicensed frequency.

Here, the second resource pool is a preconfigured resource pool including at least one candidate Sidelink resource on the unlicensed frequency, and the second resource pool may be stored on the terminal. When the terminal needs to request Sidelink resources on the unlicensed frequency, the terminal determines the target Sidelink resource on the unlicensed frequency from the second resource pool.

It is worth noting that the second resource pool may be a resource pool preconfigured by the terminal including Sidelink resources on unlicensed frequencies that the terminal can use.

Based on the second resource pool, even if the network side device has not sent any usable Sidelink resources on the unlicensed frequency to the terminal, the terminal can still determine the target Sidelink resource on the unlicensed frequency. Moreover, no matter what working status the terminal is in, the terminal can determine the target Sidelink resource based on the second resource pool. For example, when the terminal is in a connected state, an idle state, or an inactive state, the target Sidelink resource can be determined through the second resource pool.

Wherein, the terminal may determine the target Sidelink resource on the unlicensed frequency in the second resource pool based on the third preset rule. For example, a Sidelink resource with large bandwidth and low latency that is not on an unlicensed frequency is selected from the second resource pool as the target Sidelink resource.

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

Therefore, by determining the target Sidelink resources on the unlicensed frequency for Sidelink communication in the preconfigured second resource pool, the terminal can be enabled to allocate Sidelink resources on the unlicensed frequency when the network side device does not support it. Determine the target Sidelink resource on the unlicensed frequency for Sidelink communications. This expands the frequency resources available for Sidelink to provide large-bandwidth, low-latency Sidelink communication links.

Figure 11 is a flow chart of a communication method according to other embodiments. As shown in Figure 11, this communication method can be used in a terminal and includes the following steps.

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

Step 1120: In the case that the network side device has sent the frequency configuration information, determine the target Sidelink resource on the unlicensed frequency from the second resource pool pre-configured by the terminal, where the second resource pool includes at least one candidate on the unlicensed frequency. Sidelink resources on authorized frequencies.

Step 1130: Perform Sidelink communication on the target Sidelink resource.

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

Wherein, when 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 to perform Sidelink communication based on the target Sidelink resource.

It should be understood that how to determine the target Sidelink resource on the unlicensed frequency in the second resource pool has been described in detail in step 1010 above, and will not be described again here.

It is worth noting that when the network side device does not send frequency configuration information, there is no need to confirm the working status of the terminal, but the target Sidelink resource on the unlicensed frequency is determined directly 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 the connected state, idle state, or inactive state, the target Sidelink on the unlicensed frequency is determined from the preconfigured second resource pool. resource.

Therefore, when the network side device does not send the frequency configuration information, by determining the target Sidelink resource on the unlicensed frequency for Sidelink communication in the preconfigured second resource pool, the terminal can be enabled to use the network side device. In the case where Sidelink resources allocated on unlicensed frequencies are not supported, the target Sidelink resources used for Sidelink communication are determined. This expands the frequency resources available for Sidelink to provide large-bandwidth, low-latency Sidelink communication links.

Figure 12 is a flowchart of a communication method according to further embodiments. As shown in Figure 12, this communication method can be used in a terminal and includes the following steps.

In step 1210, a second resource request is sent to the network side device, where the second resource request is used to request the network side device to allocate Sidelink resources on a designated unlicensed frequency to the terminal.

Here, the terminal may send a second resource request to the network side device, where the second resource request is used to request the network side device to allocate Sidelink resources on a designated unlicensed frequency to the terminal. In some embodiments, the second resource request may be carried through a SidelinkUEInformation message.

The designated unlicensed frequency may be at least one unlicensed frequency determined by the terminal among the unlicensed frequencies that the network side device can support. It should be understood that for the relevant meaning of the Sidelink resource, reference may be made to the relevant description of step 210 in the embodiment shown in FIG. 2 .

When the terminal is in the connected state, the terminal may send a second resource request to the network side device, so that the network side device responds to the second resource request and allocates Sidelink resources designated by the terminal on a designated unlicensed frequency to the terminal.

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

The second destination terminal identification; the second logical channel identification; the transmission frequency identification; the second unlicensed frequency identification.

Wherein, the second destination terminal identifier is used to indicate that the data sending 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 sending frequency of the logical channel is the Designate an unlicensed frequency; the sending 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 at the sending frequency of the data to be sent When the frequency is an unlicensed frequency, the second unlicensed frequency identifier indicates that the Sidelink resource requested by the terminal is at the designated unlicensed frequency.

Here, the destination terminal refers to the peer terminal with which the terminal performs Sidelink communication. As shown in FIG. 1 , the second terminal 12 is the destination terminal of the first terminal 11 . By carrying the second target terminal identifier in the second resource request, it can be indicated that the data transmission frequency used by the target terminal in Sidelink communication is the Sidelink resource on the designated unlicensed frequency. By carrying the second logical channel identifier in the second resource request, it can be indicated that the data transmission frequency of the logical channel in Sidelink communication is at a designated unlicensed frequency.

The sending frequency identifier is used to indicate that at least one unlicensed frequency in the frequency configuration information is a specified unlicensed frequency. Wherein, since the second resource request carries the designated unlicensed frequency specified by the terminal, the designated unlicensed frequency is determined in the first frequency list and/or the second frequency list.

The second unlicensed frequency identifier is used to indicate that the Sidelink resources requested by the terminal from the network side device are on the specified unlicensed frequency. By carrying the second unauthorized identification in the second resource request, the network side device can know that the terminal is about to request Sidelink resources on the designated unauthorized frequency. The network side device allocates the specified unauthorized frequency to the terminal based on the second unauthorized identification. Sidelink resource on frequency.

In some embodiments, in the case where the frequency configuration information includes multiple frequency lists, the transmission frequency identifier includes: a first identifier used to indicate the order of the multiple frequency lists.

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

In some embodiments, when the frequency configuration information includes multiple frequency lists, if the second resource request includes the second unlicensed frequency identification, the sending frequency identification includes:

A second identifier used to indicate a first target frequency list, which is a frequency list among the plurality of frequency lists that carries an unlicensed frequency corresponding to the second unlicensed frequency identifier.

Here, the second resource request includes a second unlicensed frequency identifier, indicating that the terminal requests Sidelink resources on the unlicensed frequency. The first target frequency list is a frequency list carrying an unlicensed frequency corresponding to the second unlicensed frequency identifier among the plurality of frequency lists. Through the second identifier, the network side device can know the frequency list in which the unlicensed frequency corresponding to the second unlicensed frequency identifier is located.

In some embodiments, when the frequency configuration information includes multiple frequency lists, if the second resource request does not carry the second unlicensed frequency identifier, the sending frequency identifier includes:

Here, the second resource request does not carry the second unlicensed frequency identifier, indicating that the terminal requests Sidelink resources on the authorized frequency. The second target frequency list is a frequency list carrying authorized frequency resources among the plurality of frequency lists. Through the third identifier, the network side device can know the frequency list where the authorized frequency is located.

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

Here, in response to the confirmation information sent by the network side device, the terminal determines the Sidelink resource on the designated unlicensed frequency allocated by the network side device as the target Sidelink resource. The confirmation information is information sent by the network side device for allocating at least one Sidelink resource designated by the terminal on a designated unlicensed frequency to the terminal.

It is worth noting that, in response to the second resource request, the network side device allocates to the terminal the Sidelink resource specified by the terminal on the specified unlicensed frequency, which means that the network side device selects from at least one Sidelink resource on the specified unlicensed frequency. At least one Sidelink resource is allocated to the terminal.

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

Figure 13 is a communication sequence diagram illustrating a communication method according to some embodiments. As shown in Figure 13, the terminal sends a second resource request to the network side device. The network side device receives the second resource request and responds to the second resource request by allocating Sidelink resources on the designated unlicensed frequency to the terminal. The network side device Confirmation information is sent to the terminal, and the terminal receives the confirmation information, responds to the confirmation information, and uses the allocated Sidelink resource as the target Sidelink resource.

Therefore, the terminal sends a second resource request to the network side device, so that the network side device responds to the second resource request and allocates Sidelink resources on the designated unlicensed frequency to the terminal, and the terminal allocates Sidelink resources on the designated unlicensed frequency to the terminal. The Sidelink resource on the frequency is determined as the target Sidelink resource for Sidelink communication, so that Sidelink communication is performed on the target Sidelink resource. It enables the terminal to independently select unlicensed frequencies for Sidelink communication to expand the frequency resources available for Sidelink and provide large-bandwidth, low-latency Sidelink communication links.

Figure 14 is a flowchart of a communication method according to other embodiments. As shown in Figure 14, this communication method can be used in a terminal and includes the following steps.

In step 1410, receive the frequency configuration information sent by the network side device.

Here, the terminal may request the network side device to send frequency configuration information to the terminal, or receive the frequency configuration information broadcast by the network side device to obtain the frequency configuration information sent by the network side device. The frequency configuration information is used to enable the terminal to determine target Sidelink resources on unlicensed frequencies for Sidelink communication.

In some embodiments, the frequency configuration information can be obtained according to an RRC reconfiguration message sent by a relay terminal, where the RRC reconfiguration message is sent by a network side device to the relay terminal.

It should be understood that the network side device sends an RRC reconfiguration message to the relay terminal, and the relay terminal forwards the RRC reconfiguration message to the terminal. The RRC message carries frequency configuration information. Among them, the RRC reconfiguration message may be a Sidelink RRC reconfiguration message.

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

The first frequency list, the second frequency list, CAPC configuration information and LBT configuration information.

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

Here, the terminal may determine the designated unlicensed frequency in the first frequency list and/or the second frequency list in the frequency configuration information.

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.

In step 1430, a second resource request is sent to the network side device, where the second resource request is used to request the network side device to allocate Sidelink resources on a designated unlicensed frequency to the terminal.

Here, regarding the specific execution logic of step 1430, reference may be made to the description of step 1210 in the embodiment shown in FIG. 12, which will not be described again here.

The second destination terminal identification, the second logical channel identification, the transmission frequency identification and the second unlicensed frequency identification.

For the relevant meanings of the second destination terminal identifier, the second logical channel identifier, the transmission frequency identifier, and the second unlicensed frequency identifier, reference may be made to the relevant description of step 1210 in the embodiment shown in FIG. 12 .

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

Here, regarding the specific execution logic of step 1440, reference may be made to the description of step 1220 in the embodiment shown in FIG. 12, which will not be described again here.

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

Here, regarding the specific execution logic of step 1450, reference may be made to the description of step 1230 in the embodiment shown in FIG. 12, which will not be described again here.

Therefore, the terminal can determine the designated unlicensed frequency in the frequency configuration information issued by the network side device, and send a second resource request to the network side device, so that the network side device responds to the second resource request and allocates the frequency to the terminal. Specify the Sidelink resource on the unlicensed frequency, and the terminal determines the Sidelink resource on the specified unlicensed frequency allocated by the network side device as the target Sidelink resource for Sidelink communication, so as to perform Sidelink communication on the target Sidelink resource. It is possible for the terminal to independently select the target unlicensed frequency resources for Sidelink communication to expand the frequency resources available for Sidelink and provide a large-bandwidth, low-latency Sidelink communication link.

Figure 15 is a flowchart of a communication method according to further embodiments. As shown in Figure 15, this communication method can be used in a terminal and includes the following steps.

Step 1510, determine whether the network side device sends frequency configuration information to the terminal;

Step 1520: When the network side device has sent frequency configuration information, determine whether the terminal is in a connected state;

Step 1530: When the terminal is in the connected state, determine whether the specified unlicensed frequency to be requested by the terminal is in the frequency configuration information;

Step 1540: If the specified unlicensed frequency to be requested by the terminal is in the frequency configuration information, send a second resource request to the network side device;

Step 1560: Determine the Sidelink resource on the designated unlicensed frequency allocated by the network side device as the target Sidelink resource;

Step 1570: Perform Sidelink communication on the target Sidelink resource.

Here, regarding the method performed in step 1510, reference may be made to the relevant description of step 510 in the embodiment shown in FIG. 5, which will not be described again. Regarding the relevant content of the frequency configuration information, reference may also be made to the relevant description of step 510 in the embodiment shown in FIG. 5 , which will not be described again here. Regarding the method of performing step 1520, reference may be made to the relevant description of step 520 in the embodiment shown in FIG. 5, which will not be described again here. For relevant descriptions of Sidelink resources, please refer to the description of step 210 in the embodiment shown in FIG. 2, which will not be described again here.

It is worth noting that in some embodiments, the frequency configuration information can be obtained according to a system message sent by a network side device. The system message sent by the network side device carries frequency configuration information. In some embodiments, the frequency configuration information can be obtained according to an RRC reconfiguration message sent by a network side device. The RRC reconfiguration message sent by the network side device carries frequency configuration information. In some embodiments, the frequency configuration information can be obtained according to an RRC reconfiguration message sent by a relay terminal, where the RRC reconfiguration message is sent by a network side device to the relay terminal. It should be understood that the network side device sends the RRC reconfiguration message to the relay terminal, and the relay terminal forwards the RRC reconfiguration message to the terminal. The RRC message carries frequency configuration information. Among them, the RRC reconfiguration message may be a Sidelink RRC reconfiguration message.

In step 1530, when the terminal is in the connected state, it is further determined whether the specified unlicensed frequency to be requested by the terminal is in the frequency configuration information. Wherein, when the designated unlicensed frequency to be requested by the terminal is in the first frequency list and/or the second frequency list, it is determined that the designated unlicensed frequency to be requested by the terminal is in the frequency configuration information. Then the terminal sends a second resource request to the network side device for requesting the network side device to allocate Sidelink resources on the specified unlicensed frequency to the terminal, so that the network side device responds to the second resource request and allocates the Sidelink resource on the specified unlicensed frequency to the terminal. The Sidelink resource on the frequency is used as the target Sidelink resource of the terminal.

In some embodiments, the second resource request may be carried through a SidelinkUEInformation message.

It is worth noting that the second resource request carries a designated unlicensed frequency specified by the terminal. The designated unlicensed frequency may be determined by the terminal in the first frequency list and/or the second frequency list. 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.

It is worth noting that for the meaning of the second destination terminal identifier, the second logical channel identifier, the transmission frequency identifier and the second unlicensed frequency identifier, please refer to the relevant description in step 1430 in the embodiment shown in Figure 14. Herein No longer.

In step 1540, the terminal determines the Sidelink resource on the designated unlicensed frequency allocated by the network side device 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 sending resources and/or Sidelink receiving resources for Sidelink communication.

Therefore, when the network side device has sent the frequency configuration information to the terminal, if the terminal is in the connected state, the terminal can determine the designated unlicensed frequency in the frequency configuration information issued by the network side device, and send the third frequency to the network side device. Two resource requests, so that the network side device responds to the second resource request and allocates Sidelink resources on the designated unlicensed frequency to the terminal, and the terminal determines the Sidelink resources on the designated unlicensed frequency allocated by the network side device as The target Sidelink resource to use for Sidelink communication on which Sidelink communication takes place. It is possible for the terminal to independently select target Sidelink resources on unlicensed frequencies for Sidelink communication to expand the frequency resources available for Sidelink and provide a large-bandwidth, low-latency Sidelink communication link.

Figure 16 is a flowchart of a communication method according to some embodiments. As shown in Figure 16, this communication method can be used in a terminal and includes the following steps.

In step 1610, target Sidelink resources on the unlicensed frequency are determined based on the frequency configuration information issued by the network side device and the third resource pool.

Here, for the relevant content of the frequency configuration information, reference can be made to the relevant description of step 510 in the embodiment shown in FIG. 5 , which will not be described again here. In some embodiments, the frequency configuration information can be obtained according to a system message sent by a network side device. The system message sent by the network side device carries frequency configuration information. In some embodiments, the frequency configuration information can be obtained according to an RRC reconfiguration message sent by a network side device. The RRC reconfiguration message sent by the network side device carries frequency configuration information. In some embodiments, the frequency configuration information can be obtained according to an RRC reconfiguration message sent by a relay terminal, where the RRC reconfiguration message is sent by a network side device to the relay terminal. It should be understood that the network side device sends an RRC reconfiguration message to the relay terminal, and the relay terminal forwards the RRC reconfiguration message to the terminal. The RRC message carries frequency configuration information. Among them, the RRC reconfiguration message may be a Sidelink RRC reconfiguration message.

The third resource pool includes at least one candidate Sidelink resource on an unlicensed frequency. For relevant descriptions of Sidelink resources, please refer to the description of step 210 in the embodiment shown in FIG. 2, which will not be described again here.

The third resource pool may be delivered by the network side device. In some embodiments, the terminal can obtain the third resource pool according to the system message sent by the network side device. The system message carries a third resource pool.

Among them, the target Sidelink resource determined on the unlicensed frequency according to the frequency configuration information issued by the network side device and the third resource pool may be: when the terminal is in an idle state or an inactive state, if the terminal is about to request an unlicensed frequency If the frequency 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, the Sidelink resource on the unlicensed frequency to be requested is selected as the target Sidelink resource in the third resource pool.

It is worth noting that when the terminal is in the idle state or inactive state, since there is no communication between the terminal and the network side device, at this time, if the unlicensed frequency to be requested by the terminal is in the first frequency list and/or in the frequency configuration information In the second frequency list, the terminal can determine the target Sidelink resource on the unlicensed frequency from the third resource pool.

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

Therefore, the terminal determines the Sidelink resources on the unlicensed frequency for Sidelink communication based on the frequency configuration information and the third resource pool, so as to perform Sidelink communication on the target Sidelink resource, which can not only expand the frequency resources available for Sidelink, but also To provide a large-bandwidth, low-latency Sidelink communication link, and even if the terminal is in idle or inactive state, the terminal can request target Sidelink resources on the unlicensed frequency.

Figure 17 is a flowchart of a communication method according to further embodiments. As shown in Figure 17, this communication method can be used in a terminal and includes the following steps.

Step 1710, determine whether the network side device sends frequency configuration information to the terminal;

Step 1720: When the network side device has sent frequency configuration information, determine whether the terminal is in a connected state;

Step 1730: When the terminal is in the idle state or inactive state, determine whether the unlicensed frequency to be requested by the terminal is in the frequency configuration information;

Step 1740: If the unlicensed frequency to be requested by the terminal is in the frequency configuration information, determine the target Sidelink resource on the unlicensed frequency in the third resource pool;

Step 1750: Perform Sidelink communication on the target Sidelink resource.

Here, regarding the method performed in step 1710, reference may be made to the relevant description of step 510 in the embodiment shown in FIG. 5, which will not be described again here. Regarding the relevant content of the frequency configuration information, reference may also be made to the relevant description of step 510 in the embodiment shown in FIG. 5 , which will not be described again here. Regarding the method of performing step 1720, reference may be made to the relevant description of step 520 in the embodiment shown in FIG. 5, which will not be described again here. For relevant descriptions of Sidelink resources, please refer to the description of step 210 in the embodiment shown in FIG. 2, which will not be described again here.

In some embodiments, the frequency configuration information can be obtained according to a system message sent by a network side device. The system message sent by the network side device carries frequency configuration information. In some embodiments, the frequency configuration information can be obtained according to an RRC reconfiguration message sent by a network side device. The RRC reconfiguration message sent by the network side device carries frequency configuration information. In some embodiments, the frequency configuration information can be obtained according to an RRC reconfiguration message sent by a relay terminal, where the RRC reconfiguration message is sent by a network side device to the relay terminal. It should be understood that the network side device sends an RRC reconfiguration message to the relay terminal, and the relay terminal forwards the RRC reconfiguration message to the terminal. The RRC message carries frequency configuration information. Among them, the RRC reconfiguration message may be a Sidelink RRC reconfiguration message.

In step 1730, when the terminal is in the idle state or inactive state, it is further determined whether the unlicensed frequency resource to be requested by the terminal is in the frequency configuration information. If the unlicensed frequency resource to be requested by the terminal is in the first frequency list and/or the second frequency list, it means that the unlicensed frequency resource to be requested by the terminal is in the frequency configuration information.

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

Among them, the third resource pool is also issued by the network side device. In some embodiments, the terminal may obtain the third resource pool according to a system message sent by the network side device. The system message carries a third resource pool.

It is worth noting that when the terminal is in the idle state or inactive state, since there is no communication between the terminal and the network side device, at this time, if the unlicensed frequency resource to be requested by the terminal is in the first frequency list and the frequency configuration information, /or in the second frequency list, the terminal can determine the target Sidelink resource on the unlicensed frequency from the third resource pool.

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 transmitting frequency resources and/or Sidelink receiving frequency resources.

Based on the target unlicensed frequency resource, the terminal can use the target licensed frequency resource to perform Sidelink communication with the destination terminal. Among them, Sidelink communication can be through Sidelink direct link communication, or through Sidelink indirect link communication.

Therefore, when the network side device has sent frequency configuration information to the terminal, if the terminal is in the idle state or inactive state and the unlicensed frequency resource to be requested by the terminal is in the first frequency list and/or the third frequency list in the frequency configuration information, In the second frequency list, the target unlicensed frequency resource for Sidelink communication is determined in the third resource pool to perform Sidelink communication on the target unlicensed frequency resource, which can not only expand the frequency resources available for Sidelink to provide large bandwidth , low-latency Sidelink communication link, and even if the terminal is in idle or inactive state, the terminal can request the target unlicensed frequency resource.

Figure 18 is a flowchart of a communication method according to further embodiments. As shown in Figure 18, this communication method can be used in a terminal and includes the following steps.

In step 1810, if the unlicensed frequency to be requested by the terminal is not in the frequency configuration information issued by the network side device, the target Sidelink resource is determined from the preconfigured fourth resource pool, wherein the The fourth resource pool includes at least one candidate Sidelink resource on the unlicensed frequency.

If the unlicensed frequency to be requested by the terminal 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 on the unlicensed frequency from the fourth resource pool according to the sixth preset rule. resource. It should be understood that, for relevant descriptions of Sidelink resources, reference may be made to the description of step 210 in the embodiment shown in FIG. 2 , which will not be described again here.

Wherein, the fourth resource pool is a preconfigured fourth resource pool including at least one candidate Sidelink resource on an unlicensed frequency, and the fourth resource pool may be stored on the terminal. When the unlicensed frequency to be requested by the terminal is not in the frequency configuration information issued by the network side device, the terminal can determine the target Sidelink resource on the unlicensed frequency from the fourth resource pool according to the sixth preset rule. For example, a Sidelink resource is randomly selected from the fourth resource pool as the target Sidelink resource, or an idle Sidelink resource is selected as the target Sidelink resource.

It is worth noting that the fourth resource pool may be a resource pool preconfigured by the terminal including Sidelink resources on unlicensed frequencies that the terminal can use.

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

Therefore, even if the unlicensed frequency to be requested by the terminal is not in the first frequency list and/or the second frequency list of the frequency configuration information, the terminal can determine the Sidelink resource on the unlicensed frequency as the target Sidelink resource. Moreover, no matter what working status the terminal is in, 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, the target Sidelink resource can be determined through the fourth resource pool. This expands the frequency resources available for Sidelink to provide large-bandwidth, low-latency Sidelink communication links.

Figure 19 is a flow chart of a communication method according to other embodiments. As shown in Figure 19, this communication method can be used in a terminal and includes the following steps.

Step 1910, determine whether the network side device sends frequency configuration information to the terminal;

Step 1920, determine whether the unlicensed frequency to be requested by the terminal is in the frequency configuration information;

Step 1930: If the unlicensed frequency to be requested by the terminal is not in the frequency configuration information, determine the target Sidelink resource on the unlicensed frequency in the fourth resource pool;

Step 1940: Perform Sidelink communication on the target Sidelink resource.

Here, regarding the method performed in step 1910, reference may be made to the relevant description of step 510 in the embodiment shown in FIG. 5, which will not be described again here. Regarding the relevant content of the frequency configuration information, reference may also be made to the relevant description of step 510 in the embodiment shown in FIG. 5 , which will not be described again here. For relevant descriptions of Sidelink resources, please refer to the description of step 210 in the embodiment shown in FIG. 2, which will not be described again here.

In step 1920, if the unlicensed frequency to be requested by the terminal is not in the first frequency list and/or the second frequency list, it means that the unlicensed frequency to be requested by the terminal is not in the frequency configuration information.

In step 1930, if the unlicensed frequency to be requested by the terminal is not in the frequency configuration information, the terminal may determine the target Sidelink resource on the unlicensed frequency from the fourth resource pool according to the sixth preset rule.

Wherein, the fourth resource pool is a preconfigured fourth resource pool including at least one candidate Sidelink resource on an unlicensed frequency, and the fourth resource pool may be stored on the terminal. When the unlicensed frequency to be requested by the terminal is not in the frequency configuration information issued by the network side device, the terminal can determine the target Sidelink resource on the unlicensed frequency from the fourth resource pool according to the sixth preset rule. For example, at least one Sidelink resource is randomly selected as the target Sidelink resource, or an idle Sidelink resource is selected as the target Sidelink resource.

In addition, in this embodiment, regardless of whether the terminal is in the connected state, idle state, or inactive state, as long as the unlicensed frequency to be requested by the terminal is not in the first frequency list and/or the second frequency list, the third frequency preconfigured by the terminal is In the four resource pools, determine the target Sidelink resources on the unlicensed frequency.

Regarding the specific execution process of step 1940, reference may be made to the relevant description of step 220 in the embodiment shown in FIG. 2, which will not be described again here.

Therefore, even if the unlicensed frequency to be requested by the terminal is not in the first frequency list and/or the second frequency list in the frequency configuration information, the terminal can determine the target Sidelink resource. Moreover, no matter what working status the terminal is in, the terminal can determine the target Sidelink resource based on the fourth resource pool. For example, when the terminal is in the connected state, idle state, or inactive state, the target Sidelink resource can be determined through the fourth resource pool. This expands the frequency resources available for Sidelink to provide large-bandwidth, low-latency Sidelink communication links.

Figure 20 is a flowchart of a communication method according to further embodiments. As shown in Figure 20, this communication method can be used in a terminal and includes the following steps.

Step 2010, determine whether the network side device sends frequency configuration information to the terminal;

Step 2011: When the network side device has sent frequency configuration information, determine whether the terminal is in a connected state;

Step 2012: When the terminal is in the connected state, send a first resource request to the network side device for requesting the network side device to allocate Sidelink resources on the unlicensed frequency to the terminal, and execute step 2021;

Step 2013: When the terminal is in the idle state or inactive state, determine the target Sidelink resource on the unlicensed frequency from the first resource pool issued by the network side device, where the first resource pool includes at least one candidate Sidelink resources on unlicensed frequencies and perform step 2021;

Step 2014: When the network side device does not send frequency configuration information, determine whether the unlicensed frequency that the terminal will request is in the frequency configuration information, and if the unlicensed frequency that the terminal will request is not in the frequency configuration information, execute Step 2015;

Step 2015, determine the target Sidelink resource on the unlicensed frequency in the fourth resource pool, and execute step 2021;

Step 2016: In the case where 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, where the second resource pool includes at least one candidate on the unlicensed frequency. Authorize Sidelink resources on the frequency and perform step 2021;

Step 2017: When the terminal is in the idle state or inactive state, determine whether the unlicensed frequency to be requested by the terminal is in the frequency configuration information, and when the unlicensed frequency to be requested by the terminal is in the frequency configuration information, execute Step 2018 and execute step 2021.

Step 2018: Determine the target Sidelink resource on the unlicensed frequency in the third resource pool;

Step 2019: When the terminal is in the connected state, determine whether the unlicensed frequency to be requested by the terminal is in the frequency configuration information, and if the unlicensed frequency to be requested by the terminal is in the frequency configuration information, perform step 2020 and execute Step 2021.

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

Step 2021: Perform Sidelink communication on the target Sidelink resource.

Here, regarding the method steps performed in step 2010, reference may be made to the description of step 510 in the embodiment shown in FIG. 5, which will not be described again here. Regarding the method steps performed in step 2011, reference may be made to the description of step 520 in the embodiment shown in FIG. 5, which will not be described again here. Regarding the method steps performed in step 2012, reference may be made to the relevant description of

steps

530 and 540 in the embodiment shown in FIG. 5, which will not be described again here. For relevant descriptions of Sidelink resources, please refer to the description of step 210 in the embodiment shown in FIG. 2, which will not be described again here.

Regarding the method steps performed in step 2013, reference may be made to the relevant description of step 610 in the embodiment shown in FIG. 6, which will not be described again here. Regarding the method steps performed in step 2014, reference may be made to the relevant description of step 1530 in the embodiment shown in FIG. 15, which will not be described again here. Regarding the method steps performed in step 2015, reference may be made to the relevant description of step 1810 in the embodiment shown in FIG. 18, which will not be described again here. Regarding the method steps performed in step 2016, reference may be made to the relevant description of step 1010 in the embodiment shown in FIG. 10, which will not be described again here. Regarding the method steps performed in step 2017, reference may be made to the relevant description of step 1730 in the embodiment shown in FIG. 17, which will not be described again here. Regarding the method steps performed in step 2018, reference may be made to the relevant description of step 1610 in the embodiment shown in FIG. 16, which will not be described again here. Regarding the method steps performed in step 2019, reference may be made to the relevant description of step 1730 in the embodiment shown in FIG. 17, which will not be described again here. Regarding the method steps performed in step 2020, reference may be made to the relevant description in the embodiment shown in FIG. 14, which will not be described again here. Regarding the method steps performed in step 2021, reference may be made to the relevant description of step 550 in the embodiment shown in FIG. 5, which will not be described again here.

Therefore, the terminal determines the target Sidelink resource on the unlicensed frequency for Sidelink communication and performs Sidelink communication on the target Sidelink resource, thereby expanding the available frequency resources of Sidelink to provide large bandwidth and low latency Sidelink. communication link.

Embodiments of the present disclosure provide a communication method, which is applied to network side devices. The method includes:

Optionally, the method also includes:

Receive the first resource request sent by the terminal;

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

First destination terminal identification;

First logical channel identifier;

First unlicensed frequency identification;

Optionally, the method also includes:

Optionally, sending the first resource pool to the terminal includes:

Send the first resource pool to the terminal through a system message.

Optionally, the method also includes:

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

Second destination terminal identification;

second logical channel identifier;

Send frequency identification;

Second unlicensed frequency identification;

or,

Optionally, the method also includes:

Optionally, sending the third resource pool to the terminal includes:

Send the third resource pool to the terminal through a system message.

First frequency list;

Second frequency list;

CAPC configuration information;

LBT configuration information;

the second frequency list includes unlicensed frequencies;

For a description of the specific steps of the above communication method performed by the network side device, reference may be made to the relevant description of the specific steps of the above communication method performed by the terminal in the above embodiments, which will not be described again here.

Figure 21 is a flowchart of a communication method according to other embodiments. As shown in Figure 21, the communication method includes:

S2110, the network side device sends frequency configuration information to the terminal;

S2120, the terminal determines that the network side device has sent the frequency configuration information;

S2130, the terminal determines that the terminal is in the connected state;

S2140, the terminal sends the first resource request to the network side device;

S2150: The network side device receives the first resource request sent by the terminal;

S2160: The network side device responds to the first resource request and allocates Sidelink resources on the unlicensed frequency to the terminal;

S2170: The terminal uses the Sidelink resource allocated by the network side device as the target Sidelink resource;

S2180: The terminal performs Sidelink communication on the target Sidelink resource.

Figure 22 is a flowchart of a communication method according to further embodiments. As shown in Figure 22, the communication method includes:

S2210, the network side device sends frequency configuration information to the terminal;

S2220, the terminal determines that the network side device has sent frequency configuration information;

S2230, the terminal determines that the terminal is in the connected state;

S2240, the terminal determines the designated unlicensed frequency in the frequency configuration information;

S2250, the terminal sends a second resource request to the network side device;

S2260, the network side device receives the second resource request;

S2270: The network side device responds to the second resource request and allocates Sidelink resources on the specified unlicensed frequency to the terminal;

S2280: The terminal uses the Sidelink resource on the designated unlicensed frequency allocated by the network side identity as the target Sidelink resource;

S2290, perform Sidelink communication on the target Sidelink resource.

Figure 23 is a flowchart of a communication method according to further embodiments. As shown in Figure 23, the communication method includes:

S2310: The network side device sends the first resource pool to the terminal;

S2320: The terminal receives the first resource pool sent by the network side device;

S2330, the network side device sends frequency configuration information to the terminal;

S2240, the terminal determines that the network side device has sent frequency configuration information;

S2350, the terminal determines that the terminal is in the idle state or inactive state;

S2360: The terminal determines the target Sidelink resource on the unlicensed frequency in the first resource pool;

S2370: The terminal performs Sidelink communication on the target Sidelink resource.

Figure 24 is a flowchart of a communication method according to further embodiments. As shown in Figure 24, the communication method includes:

S2410, the network side device sends the third resource pool to the terminal;

S2420, the terminal receives the third resource pool sent by the network side device;

S2430, the network side device sends frequency configuration information to the terminal;

S2440, the terminal determines that the network side device has sent frequency configuration information;

S2450, the terminal determines that the terminal is in the idle state or inactive state;

S2460: When the terminal determines that the unlicensed frequency to be requested by the terminal is in the frequency configuration information, it determines the target Sidelink resource on the unlicensed frequency in the third resource pool;

S2470: The terminal performs Sidelink communication on the target Sidelink resource.

Figure 25 is a flowchart of a communication method according to further embodiments. As shown in Figure 25, the communication method includes:

S2510, the network side device sends frequency configuration information to the terminal;

S2520, the terminal determines that the network side device has not sent frequency configuration information;

S2530: The terminal determines the target Sidelink resource on the unlicensed frequency from the second resource pool pre-configured by the terminal;

S2540: The terminal performs Sidelink communication on the target Sidelink resource.

Figure 26 is a flowchart of a communication method according to further embodiments. As shown in Figure 26, the communication method includes:

S2610, the network side device sends frequency configuration information to the terminal;

S2620, the terminal determines that the network side device has sent frequency configuration information;

S2630, the terminal determines that the unlicensed frequency to be requested by the terminal is not in the frequency configuration information;

S2640: The terminal determines the target Sidelink resource on the unlicensed frequency from the fourth resource pool pre-configured by the terminal;

S2650: The terminal performs Sidelink communication on the target Sidelink resource.

Figure 27 is a block diagram of a communication device according to an exemplary embodiment. Referring to Figure 27, the device 2700 is applied to a terminal. The device 2700 includes:

The determination module 2701 is configured to determine the target Sidelink resource on the unlicensed frequency;

The communication module 2702 is configured to perform Sidelink communication on the target Sidelink resource.

Optionally, the determining module 2701 includes:

The first sending unit is configured to send a first resource request to the network side device, where the first resource request is used to request the network side device to allocate Sidelink resources on the unlicensed frequency to the terminal;

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

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

The first destination terminal identification, the first logical channel identification and the first unlicensed frequency identification;

Optionally, the determining module 2701 includes:

The second determination unit is configured to determine the target Sidelink resource from a first resource pool delivered by the network side device, where the first resource pool includes at least one candidate Sidelink resource on an unlicensed frequency.

Optionally, the second determining unit is further configured to:

Optionally, the determining module 2701 includes:

The third determination unit is configured to determine the target Sidelink resource from a second resource pool preconfigured by the terminal, wherein the second resource pool includes at least one candidate Sidelink resource on an unlicensed frequency.

Optionally, the determining module 2701 includes:

The second sending unit is configured to send a second resource request to the network side device, where the second resource request is used to request the network side device to allocate Sidelink resources on the designated unlicensed frequency to the terminal;

The fourth determining unit is configured to determine the Sidelink resource on the designated unlicensed frequency allocated by the network side device as the target Sidelink resource.

Optionally, the determination module 2701 also includes:

A receiving unit configured to receive frequency configuration information sent by the network side device;

The fifth determining unit is configured to determine the designated unlicensed frequency in the frequency configuration information.

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

The second destination terminal identification, the second logical channel identification, the transmission frequency identification and the second unlicensed frequency identification;

or,

Optionally, the determining module 2701 includes:

The sixth determination unit is configured to determine the target Sidelink resource according to the frequency configuration information issued by the network side device and a third resource pool, wherein the third resource pool includes at least one candidate Sidelink on an unlicensed frequency. resource.

Optionally, the determination module 2701 is also configured to:

Optionally, the determining module 2701 includes:

The seventh determination unit is configured to determine the target Sidelink resource from the preconfigured 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 an unlicensed frequency.

The first frequency list, the second frequency list, CAPC configuration information and LBT configuration information;

the second frequency list includes unlicensed frequencies;

Optionally, the device 2700 also includes:

The first message receiving unit is configured to obtain the frequency configuration information according to the system message sent by the network side device; and/or,

The second message receiving unit is configured to obtain the frequency configuration information according to the RRC reconfiguration message sent by the network side device; and/or,

The third message receiving unit is configured to obtain the frequency configuration information according to an RRC reconfiguration message sent by the relay terminal, where the RRC reconfiguration message is sent by the network side device to the relay terminal.

Regarding the device 2700 in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be described in detail here.

Figure 28 is a block diagram of a communication device according to an exemplary embodiment. Referring to Figure 28, the device 2800 is applied to network side equipment. The device 2800 includes:

The first message sending module 2801 is configured to send frequency configuration information to the terminal, where the frequency configuration information is used to enable the terminal to determine target Sidelink resources on unlicensed frequencies for Sidelink communication.

Optionally, the device 2800 also includes:

The first receiving module is configured to receive the first resource request sent by the terminal;

The first response module is configured to respond to the first resource request and allocate Sidelink resources on the unlicensed frequency to the terminal, so that the terminal determines the allocated Sidelink resource as the target Sidelink resource.

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

Optionally, the device 2800 also includes:

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 the target Sidelink resource on the unlicensed frequency from the first resource pool, The first resource pool includes at least one candidate Sidelink resource on an unlicensed frequency.

Optionally, the first message sending module 2801 is specifically configured as:

Send the first resource pool to the terminal through a system message.

Optionally, the device 2800 also includes:

The second receiving module is configured to receive a second resource request sent by the terminal, where the second resource request is used to request the network side device to allocate Sidelink resources on a designated unlicensed frequency to the terminal, and the designated The unlicensed frequency is determined based on the frequency configuration information;

A second response module configured to respond to the second resource request and allocate Sidelink resources on the designated unlicensed frequency to the terminal, so that the terminal uses the allocated Sidelink resource as the target. Sidelink resources.

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

or,

Optionally, the device 2800 also includes:

A third message sending module configured to send a third resource pool to the terminal, where the third resource pool is used by the terminal to determine the target Sidelink resource according to 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.

Optionally, the third message sending module is specifically configured as:

Send the third resource pool to the terminal through a system message.

the second frequency list includes unlicensed frequencies;

Regarding the device 2800 in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be described in detail here.

The present disclosure also provides a computer-readable storage medium on which computer program instructions are stored. When the program instructions are executed by a processor, the steps of the communication method provided by the present disclosure are implemented.

Figure 29 is a block diagram of a terminal according to an exemplary embodiment. For example, the terminal 2900 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, a smart car, etc.

Referring to 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, and a sensor component. 2914, and communications component 2916.

The first processing component 2902 generally controls the overall operations of the terminal 2900, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. 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 above communication method. Additionally, first processing component 2902 may include one or more modules to facilitate interaction between first processing component 2902 and other components. For example, first processing component 2902 may include a multimedia module to facilitate interaction between multimedia component 2908 and first processing component 2902.

The first memory 2904 is configured to store various types of data to support operations at the terminal 2900. Examples of such data include instructions for any application or method operating on terminal 2900, contact data, phonebook data, messages, pictures, videos, etc. The first memory 2904 may 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 Except programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

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

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 touch screen 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 sensor may not only sense the boundaries of a touch or swipe action, but also detect the duration and pressure associated with the touch or swipe action. In some embodiments, multimedia component 2908 includes a front-facing camera and/or a rear-facing camera. When the terminal 2900 is in an operation mode, such as a shooting mode or a video mode, the front camera and/or the rear camera may receive external multimedia data. Each front-facing camera and rear-facing camera can be a fixed optical lens system or have a focal length and optical zoom capabilities.

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 operating modes, such as call mode, recording mode, and voice recognition mode. The received audio signal may be further stored in first memory 2904 or sent via communication component 2916. In some embodiments, audio component 2910 also includes a speaker for outputting audio signals.

The first input/output interface 2912 provides an interface between the first processing component 2902 and a peripheral interface module. The peripheral interface module may be a keyboard, a click wheel, a button, etc. These buttons may include, but are not limited to: Home button, Volume buttons, Start button, and Lock button.

Sensor component 2914 includes one or more sensors for providing various aspects of status assessment for terminal 2900 . For example, the sensor component 2914 can detect the open/closed state of the terminal 2900 and the relative positioning of components, such as the display and keypad of the terminal 2900. The sensor component 2914 can also detect the position change of the terminal 2900 or a component of the terminal 2900. , the presence or absence of user contact with the terminal 2900, the orientation or acceleration/deceleration of the terminal 2900 and the temperature change of the 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, the sensor component 2914 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 2916 is configured to facilitate wired or wireless communication between the terminal 2900 and other devices. The terminal 2900 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In one exemplary embodiment, the communication component 2916 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communications component 2916 also includes a near field communications (NFC) module to facilitate short-range communications. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

In an exemplary embodiment, terminal 2900 may be configured 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 array (FPGA), controller, microcontroller, microprocessor or other electronic components are implemented for performing the above communication method.

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

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 function for performing the above when executed by the programmable device. The code part of the communication method.

Figure 30 is a block diagram of a network side device according to an exemplary embodiment. For example, the network side device 3000 may be provided as a base station. Referring to FIG. 30 , the network side device 3000 includes a second processing component 3022 , which further includes one or more processors, and a memory resource represented by a second memory 3032 for storing instructions executable by the second processing component 3022 , such as applications. The application program stored in the second memory 3032 may include one or more modules each corresponding to a set of instructions. Additionally, the second processing component 3022 is configured to execute instructions to perform the communication method.

The network side device 3000 may also include a second power 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 the network, and a second input/ Output interface 3058. The network side device 3000 may operate based on an operating system stored in the memory 3032, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM or similar.

Other embodiments of the disclosure will be readily apparent to those skilled in the art from consideration of the specification and practice of the disclosure. This application is intended to cover any variations, uses, or adaptations of the disclosure that follow the general principles of the disclosure and include common knowledge or customary technical means in the technical field that are not disclosed in the disclosure. . It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise structures described above and illustrated in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the disclosure is limited only by the appended claims.

Claims

A communication method, characterized in that it is applied to a terminal, and the method includes:

Determine target Sidelink resources on unlicensed frequencies;

Sidelink communication is performed on the target Sidelink resource.
The communication method according to claim 1, wherein the determining the target Sidelink resource on the unlicensed frequency includes:

Send a first resource request to the network side device, where the first resource request is used to request the network side device to allocate Sidelink resources on an unlicensed frequency to the terminal;

The Sidelink resource allocated by the network side device is determined as the target Sidelink resource.
The communication method according to claim 2, wherein the first resource request includes at least one of the following:

First destination terminal identification;

First logical channel identifier;

First unlicensed frequency identification;

Wherein, the first destination terminal identifier is used to indicate that the data sending frequency of the destination terminal is Sidelink resources on an unlicensed frequency; the first logical channel identifier is used to indicate that the data sending frequency of the logical channel is on an unlicensed frequency. Sidelink resource; the first unlicensed frequency identifier is used to indicate that the Sidelink resource requested by the terminal is on an unlicensed frequency.
The communication method according to claim 1, wherein the determining the target Sidelink resource on the unlicensed frequency includes:

The target Sidelink resource is determined from a first resource pool delivered by a network side device, where the first resource pool includes at least one candidate Sidelink resource on an unlicensed frequency.
The communication method according to claim 4, characterized in that, before determining the target Sidelink resource from the first resource pool issued by the network side device, the method further includes:

The first resource pool is obtained according to the system message sent by the network side device.
The communication method according to claim 1, wherein the determining the target Sidelink resource on the unlicensed frequency includes:

The target Sidelink resource is determined from a second resource pool pre-configured by the terminal, where the second resource pool includes at least one candidate Sidelink resource on an unlicensed frequency.
The communication method according to claim 1, wherein the determining the target Sidelink resource on the unlicensed frequency includes:

Send a second resource request to the network side device, where the second resource request is used to request the network side device to allocate Sidelink resources on a designated unlicensed frequency to the terminal;

The Sidelink resource allocated by the network side device on the specified unlicensed frequency is determined as the target Sidelink resource.
The communication method according to claim 7, characterized in that before sending the second resource request to the network side device, the method further includes:

Receive frequency configuration information sent by the network side device;

The specified unlicensed frequency is determined in the frequency configuration information.
The communication method according to claim 8, characterized in that the second resource request includes at least one of the following:

Second destination terminal identification;

second logical channel identifier;

Send frequency identification;

Second unlicensed frequency identification;

Wherein, the second destination terminal identification is used to indicate that the data sending frequency of the destination terminal is the Sidelink resource on the designated unlicensed frequency;

The second logical channel identifier is used to indicate that the data transmission frequency of the logical channel is the designated unlicensed frequency;

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

The second unlicensed frequency identifier is used to indicate, through the second unlicensed frequency identifier, that the Sidelink resource requested by the terminal is at the specified unlicensed frequency when the transmission frequency of the data to be sent is an unlicensed frequency.
The communication method according to claim 9, characterized in that, when the frequency configuration information includes multiple frequency lists, the sending frequency identification includes:

A first identifier used to indicate the order of the plurality of frequency lists.
The communication method according to claim 9, characterized in that, in the case where the frequency configuration information includes multiple frequency lists, if the second resource request includes the second unlicensed frequency identification, the sending frequency Logo includes:

A second identifier used to indicate a first target frequency list, the first target frequency list being a frequency list carrying an unlicensed frequency corresponding to the second unlicensed frequency identifier among the plurality of frequency lists;

or,

In the case where the frequency configuration information includes multiple frequency lists, if the second resource request does not carry the second unlicensed frequency identifier, the transmission frequency identifier includes:

A third identifier used to indicate a second target frequency list, which is a frequency list carrying authorized frequencies among the plurality of frequency lists.
The communication method according to claim 1, wherein the determining the target Sidelink resource on the unlicensed frequency includes:

The target Sidelink resource is determined according to the frequency configuration information delivered by the network side device and a third resource pool, where the third resource pool includes at least one candidate Sidelink resource on an unlicensed frequency.
The communication method according to claim 12, characterized in that, before determining the target Sidelink resource according to the frequency configuration information issued by the network side device and the third resource pool, the method further includes:

The third resource pool is obtained according to the system message sent by the network side device.
The communication method according to claim 1, wherein the determining the target Sidelink resource on the unlicensed frequency includes:

When the unlicensed frequency to be requested by the terminal is not in the frequency configuration information issued by the network side device, the target Sidelink resource is determined from a preconfigured fourth resource pool, where the fourth resource pool includes At least one candidate Sidelink resource on an unlicensed frequency.
The communication method according to any one of claims 8 to 14, characterized in that the frequency configuration information includes at least one of the following:

First frequency list;

Second frequency list;

CAPC configuration information;

LBT configuration information;

Wherein, the first frequency list includes authorized frequencies and unlicensed frequencies, and the unlicensed frequency is marked in the first frequency list by an unlicensed frequency identifier;

the second frequency list 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 communication method according to claim 15, characterized in that the unlicensed frequency identification includes CAPC configuration information and/or LBT configuration information.
The communication method according to any one of claims 8 to 14, characterized in that the frequency configuration information is obtained by at least one of the following methods:

Obtain the frequency configuration information according to the system message sent by the network side device;

Obtain the frequency configuration information according to the RRC reconfiguration message sent by the network side device;

The frequency configuration information is obtained according to an RRC reconfiguration message sent by a relay terminal, where the RRC reconfiguration message is sent by a network side device to the relay terminal.
A communication method, characterized in that it is applied to network side equipment, and the method includes:

Frequency configuration information is sent to the terminal, where the frequency configuration information is used to enable the terminal to determine target Sidelink resources on the unlicensed frequency for Sidelink communication.
The communication method according to claim 18, characterized in that the method further includes:

Receive the first resource request sent by the terminal;

In response to the first resource request, a Sidelink resource on an unlicensed frequency is allocated to the terminal, so that the terminal determines the allocated Sidelink resource as the target Sidelink resource.
The communication method according to claim 19, characterized in that the first resource request includes at least one of the following:

First destination terminal identification;

First logical channel identifier;

First unlicensed frequency identification;

Wherein, the first destination terminal identifier is used to indicate that the data sending frequency of the destination terminal is Sidelink resources on an unlicensed frequency; the first logical channel identifier is used to indicate that the data sending frequency of the logical channel is on an unlicensed frequency. Sidelink resource; the first unlicensed frequency identifier is used to indicate that the Sidelink resource requested by the terminal is on an unlicensed frequency.
The communication method according to claim 18, characterized in that the method further includes:

Send a first resource pool to the terminal, where the first resource pool is used by the terminal to determine target Sidelink resources on the unlicensed frequency from the first resource pool, where the first resource pool includes at least A candidate Sidelink resource on an unlicensed frequency.
The communication method according to claim 21, wherein sending the first resource pool to the terminal includes:

Send the first resource pool to the terminal through a system message.
The communication method according to claim 18, characterized in that the method further includes:

Receive a second resource request sent by the terminal, where the second resource request is used to request the network side device to allocate Sidelink resources on a designated unlicensed frequency to the terminal, and the designated unlicensed frequency is based on the The frequency configuration information is determined;

In response to the second resource request, allocate Sidelink resources on the designated unlicensed frequency to the terminal, so that the terminal uses the allocated Sidelink resources as the target Sidelink resources.
The communication method according to claim 23, characterized in that the second resource request includes at least one of the following:

Second destination terminal identification;

second logical channel identifier;

Send frequency identification;

Second unlicensed frequency identification;

Wherein, the second destination terminal identification is used to indicate that the data sending frequency of the destination terminal is the Sidelink resource on the designated unlicensed frequency;

The second logical channel identifier is used to indicate that the data transmission frequency of the logical channel is the designated unlicensed frequency;

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

The second unlicensed frequency identifier is used to indicate, through the second unlicensed frequency identifier, that the Sidelink resource requested by the terminal is at the specified unlicensed frequency when the transmission frequency of the data to be sent is an unlicensed frequency.
The communication method according to claim 24, wherein when the frequency configuration information includes multiple frequency lists, the sending frequency identification includes:

A first identifier used to indicate the order of the plurality of frequency lists.
The communication method according to claim 24, characterized in that, in the case where the frequency configuration information includes multiple frequency lists, if the second resource request includes the second unlicensed frequency identification, the sending frequency Logo includes:

A second identifier used to indicate a first target frequency list, where the first target frequency list is a frequency list among the plurality of frequency lists that carries an unlicensed frequency resource corresponding to the second unlicensed frequency identifier;

or,

In the case where the frequency configuration information includes multiple frequency lists, if the second resource request does not carry the second unlicensed frequency identifier, the transmission frequency identifier includes:

A third identifier used to indicate a second target frequency list, which is a frequency list carrying authorized frequencies among the plurality of frequency lists.
The communication method according to claim 18, characterized in that the method further includes:

Send a third resource pool to the terminal, where the third resource pool is used by the terminal to determine the target Sidelink resource according to the frequency configuration information and the third resource pool, where the third resource The pool includes at least one candidate Sidelink resource on an unlicensed frequency.
The communication method according to claim 27, wherein sending the third resource pool to the terminal includes:

Send the third resource pool to the terminal through a system message.
The communication method according to any one of claims 18 to 28, characterized in that the frequency configuration information includes at least one of the following:

First frequency list;

Second frequency list;

CAPC configuration information;

LBT configuration information;

Wherein, the first frequency list includes authorized frequencies and unlicensed frequencies, and the unlicensed frequency is marked in the first frequency list by an unlicensed frequency identifier;

the second frequency list 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 communication method according to claim 29, wherein the unlicensed frequency identification includes CAPC configuration information and/or LBT configuration information.
The communication method according to any one of claims 18 to 28, wherein the sending frequency configuration information to the terminal includes:

Send the frequency configuration information to the terminal through a system message; and/or,

Send the frequency configuration information to the terminal through an RRC reconfiguration message; and/or,

The frequency configuration information is sent to the terminal through an RRC reconfiguration message sent to the relay terminal, where the RRC reconfiguration message is forwarded to the terminal through the relay terminal.
A communication device, characterized in that it is applied to a terminal, and the device includes:

a determination module configured to determine target Sidelink resources on the unlicensed frequency;

A communication module configured to perform Sidelink communication on the target Sidelink resource.
A communication device, characterized in that it is applied to network side equipment, and the device includes:

The sending module is configured to send frequency configuration information to the terminal, where the frequency configuration information is used to enable the terminal to determine target Sidelink resources on the unlicensed frequency for Sidelink communication.
A terminal, characterized by including:

first processor;

a first memory for storing instructions executable by the first processor;

Wherein, the first processor is configured to execute the executable instructions to implement the communication method according to any one of claims 1 to 17.
A network side device, characterized by including:

second processor;

a second memory for storing instructions executable by the second processor;

Wherein, the second processor is configured to execute the executable instructions to implement the communication method according to any one of claims 18 to 31.
A computer-readable storage medium with a computer program stored thereon, characterized in that, when executed by a processing device, the program implements the steps of the communication method described in any one of claims 1 to 17 or implements claims 18 to 31 The steps of the communication method described in any one of the above.