CN111757494A

CN111757494A - Communication method and device

Info

Publication number: CN111757494A
Application number: CN201910253352.0A
Authority: CN
Inventors: 张向东; 常俊仁
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-03-29
Filing date: 2019-03-29
Publication date: 2020-10-09
Anticipated expiration: 2039-03-29
Also published as: CN111757494B; WO2020200137A1

Abstract

The application discloses a communication method and device. The method comprises the following steps: a first terminal acquires first information, wherein the first information comprises one or more of a first part of bandwidth, a first subcarrier interval, a first transmission opportunity and a first retransmission mode; the first terminal uses the first information to transmit data on a side link, which is a wireless communication link between the first terminal and a second terminal. A corresponding apparatus is also disclosed. By adopting the scheme of the application, the first terminal acquires the first information which is the comprehensively determined information, and the first terminal transmits data on the side link by using the first information, so that resource conflict with other terminals can be avoided, and the reliability of side link communication is ensured.

Description

Communication method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a communication method and apparatus.

Background

Currently, a New Radio (NR) internet of vehicles (V2X) terminal may operate in-coverage (IC) or out-coverage (OOC). The resource allocation manner of the terminal operating in the coverage area on the side link (sidelink) is also different, and may be a resource dynamically allocated by the base station (mode1), or a resource pool (resource pool) configured by the base station to sense an available resource (mode2), or may use a pre-configured resource. Terminals operating out of coverage may use pre-configured resources.

When a terminal within the coverage area or a terminal outside the coverage area uses resources to transmit data of the side link, resource conflict with other terminals is avoided, and reliability of side link communication is ensured.

Disclosure of Invention

The application provides a communication method and a communication device, which are used for avoiding resource conflict with other terminals when resources are used for data transmission of a side link, and ensuring the reliability of side link communication.

In a first aspect, a communication method is provided, the method including: a first terminal acquires first information, illustratively, the first information includes one or more of a first partial bandwidth, a first subcarrier interval, a first transmission opportunity, and a first retransmission mode; and the first terminal performs data transmission on a side link based on the first information, wherein the side link is a wireless communication link between the first terminal and a second terminal. In this aspect, the first terminal acquires the first information, the first information acquired by the first terminal is the comprehensively determined information, and the first terminal transmits data on the side link by using the first information, so that resource conflict with other terminals can be avoided, and reliability of side link communication can be ensured.

In one implementation, the obtaining, by the first terminal, first information includes: the first terminal receives the first information from network side equipment; or, the first terminal receives the first information from the second terminal.

In another implementation, the method further comprises: the first terminal obtains second information of the second terminal, for example, the second information includes one or more of a second partial bandwidth used by the second terminal, a second subcarrier interval, a second transmission opportunity, and a second retransmission mode; and the first terminal acquires first information, including: and the first terminal determines the first information according to the second information. In this aspect, the first terminal obtains the second information of the second terminal, and determines the first information according to the second information, so that resource conflict with the second terminal can be avoided, and reliability of side link communication can be ensured.

In yet another implementation, the obtaining, by the first terminal, second information of the second terminal includes: the first terminal receives the second information from the network side equipment; or, the first terminal receives the second information from the second terminal.

In yet another implementation, the method further comprises: the first terminal sends third information to the network side equipment; or the first terminal sends third information to the second terminal; illustratively, the third information includes one or more of a third fractional bandwidth used by the first terminal, a third subcarrier spacing, a third transmission opportunity, and a third retransmission pattern. In this implementation, the first terminal sends the third information to the network-side device or the second terminal, so that the network-side device may determine the first information according to the third information, or the second terminal may determine the first information according to the third information, thereby avoiding resource conflict with other terminals and ensuring reliability of edge link communication.

In yet another implementation, the method further comprises: the first terminal sends fourth information to a network side device or the second terminal, where the fourth information includes, for example, information of a broadcast service monitored by the first terminal. In the implementation, the first terminal sends the monitored information of the broadcast service to the network side device or the second terminal, so that the network side device or the second terminal can determine the first information according to the fourth information, thereby avoiding resource conflict with other terminals and ensuring reliability of side link communication.

In yet another implementation, the method further comprises: and the first terminal monitors the information of the broadcast service in a preset first period.

In yet another implementation, the first terminal is located in a first cell and the second terminal is located in a second cell, the method further comprising: the first terminal receiving a first message, the first message including a common configuration of the first cell and the second cell; and the first terminal establishing a connection with the second terminal using the common configuration.

In yet another implementation, the obtaining, by the first terminal, second information of the second terminal includes: the first terminal receives fifth information sent by the second terminal, for example, the fifth information is information of a broadcast service monitored by the second terminal in a predetermined second period, where the information of the broadcast service includes: one or more of partial bandwidth, subcarrier interval, transmission opportunity and retransmission mode used by the broadcast service; and the first terminal determines the second information according to the fifth information. In this implementation, when the first terminal and the second terminal perform unicast communication, the first terminal may determine the information of the second terminal according to the information by receiving the information of the broadcast service that is sent by the second terminal and monitored by the second terminal, so as to avoid a conflict between the broadcast communication performed by the second terminal and the unicast communication.

In yet another implementation, the method further comprises: the first terminal obtains sixth information, illustratively, the sixth information includes the first information used for broadcasting, or a mapping relationship between a broadcast service identifier and the first information; the first terminal determines first information, including: and the first terminal determines the first information according to the sixth information. In this implementation, the first terminal may conveniently determine the first information according to a mapping relationship between the broadcast service identifier and the first information, or according to the indicated first information.

In yet another implementation, the method further comprises: the first terminal obtains a preconfigured list, illustratively, the preconfigured list includes one or more configurations, and the configurations include one or more parameters of partial bandwidth, subcarrier spacing, transmission opportunity, and retransmission mode; the first terminal determines first information, including: and the first terminal determines a configuration in the pre-configuration list according to one or more of the broadcast service identification, the sending time and the broadcast service quantity, and determines the first information according to the determined configuration. In this implementation, the above one or more parameters are preconfigured, and when in use, one of the configurations is determined, and the receiving terminal may blindly check the data of the transmitting terminal on the above preconfiguration.

In yet another implementation, the transmission occasions are used to indicate one or more of the following occasions: the timing of the first terminal sending data to the network, the timing of the first terminal sending data on the side link, the timing of the first terminal receiving data sent by the network, the timing of the first terminal receiving data on the side link, or a flexible timing.

In yet another implementation, the interval between the timing at which the first terminal transmits data to the network and the timing at which the first terminal transmits data on the side link is t, where t is not equal to 0.

In yet another implementation, the first terminal is a sending device, the second terminal is a receiving device, the retransmission mode includes feedback-based retransmission and non-feedback-based retransmission, and the feedback-based retransmission refers to that the sending device needs to determine whether to perform data retransmission based on feedback of the receiving device; the non-feedback-based retransmission means that the transmitting device does not need to determine whether to perform data retransmission based on the feedback of the receiving device.

In a second aspect, a communication method is provided, the method comprising: a network side device generates first information, illustratively, the first information includes one or more of a first partial bandwidth used by the first terminal, a first subcarrier interval, a first transmission opportunity, and a first retransmission mode; and the network side equipment sends the first information to a first terminal. In this aspect, by sending the first information to the first terminal, the first information being determined synthetically, and the first terminal transmitting data on the side link using the first information, resource conflict with other terminals can be avoided, and reliability of side link communication can be ensured.

In one implementation, the method further comprises: the network side device receives second information of a second terminal, where the second information includes, for example, one or more of a second partial bandwidth used by the second terminal, a second subcarrier interval, a second transmission opportunity, and a second retransmission mode.

In another implementation, the method further includes the network side device sending the second information to the first terminal.

In another implementation, the method further includes the network device determining the first information according to the second information, and sending the first information to the first terminal.

In another implementation, the method further comprises: the network side device receives third information from the first terminal, where the third information includes, for example, one or more of a third partial bandwidth used by the first terminal, a third subcarrier interval, a third transmission opportunity, and a third retransmission mode; the network side equipment generates first information, including: and the network side equipment generates the first information according to the third information.

In yet another implementation, the first terminal is located in a first cell and the second terminal is located in a second cell, the method further comprising: the network side device sends a first message to the first terminal, where for example, the first message includes a common configuration of the first cell and the second cell.

In yet another implementation, the method further comprises: the network side device sends sixth information to the first terminal, where the sixth information includes, for example, the first information used for broadcasting or a mapping relationship between a broadcast service identifier and the first information.

In a third aspect, a communication device is provided, which may implement the communication method of the first aspect or any aspect. For example, the communication device may be a chip (such as a baseband chip, or a communication chip, etc.) or a terminal device. The above-described method may be implemented by software, hardware, or by executing corresponding software by hardware.

In one possible implementation, the communication device has a structure including a processor, a memory; the processor is configured to support the apparatus to perform corresponding functions in the above-described communication method. The memory is used for coupling with the processor, which holds the necessary programs (instructions) and/or data for the device. Optionally, the communication apparatus may further include a communication interface for supporting communication between the apparatus and other network elements.

In another possible implementation manner, the communication device may include a unit module for performing corresponding functions or actions in the above method.

In yet another possible implementation, the wireless communication device includes a processor and a transceiver, the processor is coupled to the transceiver, and the processor is configured to execute a computer program or instructions to control the transceiver to receive and transmit information; the processor is further configured to implement the above-described method when the processor executes the computer program or instructions. Illustratively, the transceiver may be a transceiver, a transceiver circuit, or an input/output interface. When the communication device is a chip, the transceiver is a transceiver or an input/output interface.

When the communication device is a chip, the sending unit may be an output unit, such as an output circuit or a communication interface; the receiving unit may be an input unit, such as an input circuit or a communication interface. When the communication device is a network device, the sending unit may be a transmitter or a transmitter; the receiving unit may be a receiver or a receiver.

In a fourth aspect, a communication device is provided, which can implement the second aspect or any implemented communication method. For example, the communication device may be a chip (such as a baseband chip, or a communication chip, etc.) or a network device, and the above method may be implemented by software, hardware, or by executing corresponding software by hardware.

In one possible implementation, the communication device has a structure including a processor, a memory; the processor is configured to support the apparatus to perform corresponding functions in the above-described communication method. The memory is used for coupling with the processor and holds the programs (instructions) and data necessary for the device. Optionally, the communication apparatus may further include a communication interface for supporting communication between the apparatus and other network elements.

In another possible implementation manner, the communication device may include a unit module for performing corresponding actions in the above method.

When the communication device is a chip, the receiving unit may be an input unit, such as an input circuit or a communication interface; the sending unit may be an output unit, such as an output circuit or a communication interface. When the communication device is a terminal device, the receiving unit may be a receiver (also referred to as a receiver); the sending unit may be a transmitter (also referred to as transmitter).

It is understood that, in the embodiments of the present application, the hardware parts responsible for input and output in the communication apparatus may be integrated together.

In a fifth aspect, a computer-readable storage medium is provided, having stored therein instructions, which, when run on a computer, cause the computer to perform the method of the above aspects.

In a sixth aspect, there is provided a computer program product containing instructions which, when run on a computer, cause the computer to perform the method of the above aspects.

A seventh aspect provides a communication system, including any one of the foregoing network device side communication apparatuses, and/or any one of the terminal side communication apparatuses.

Drawings

The drawings that are required to be used in this application, either in the examples or in the background, are described below.

Fig. 1 is a schematic architecture diagram of a communication system according to the present application;

FIG. 2 is a schematic diagram of an E-UTRAN architecture;

FIG. 3 is a schematic diagram of an NG-RAN architecture;

fig. 4 is a flowchart illustrating a communication method according to an embodiment of the present application;

FIG. 5 is a schematic diagram of BWP and/or SCS within one carrier;

fig. 6 is a flowchart illustrating another communication method according to an embodiment of the present application;

FIG. 7 is a diagram illustrating an exemplary scenario of edge link communication;

FIG. 8 is a diagram illustrating another exemplary side-link communication scenario;

fig. 9 is a flowchart illustrating another communication method according to an embodiment of the present application;

fig. 10 is a flowchart illustrating another communication method according to an embodiment of the present application;

FIG. 11 is a diagram illustrating a further exemplary scenario for edge link communication;

fig. 12 is a flowchart illustrating another communication method according to an embodiment of the present application;

fig. 13 is a flowchart illustrating another communication method according to an embodiment of the present application;

fig. 14 is a flowchart illustrating another communication method according to an embodiment of the present application;

FIG. 15 is a schematic diagram of an exemplary pre-configured BWP pattern;

fig. 16 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 17 is a schematic structural diagram of another communication device according to an embodiment of the present application;

fig. 18 is a schematic structural diagram of a simplified terminal device provided in an embodiment of the present application;

fig. 19 is a schematic structural diagram of a simplified network-side device according to an embodiment of the present application.

Detailed Description

The embodiments of the present application will be described below with reference to the drawings.

The architecture of the communication system to which the present application relates may be as shown in fig. 1. The communication system may include at least one network-side device (only 1 shown in the figure), and one or more terminal devices connected to the network-side device. Illustratively, three V2X terminal devices are illustrated in fig. 1: UE1, UE2, and UE 3. Illustratively, the UE1 and the UE2 are located within the coverage of the mobile communication network, and the UE3 is located outside the coverage of the mobile communication network. UE1 may communicate with the network side device through the mobile network, and UE1 may communicate with UE2 and UE3 through sidelink. sidelink refers to a link for direct communication between V2X terminals.

For example, the network-side device may be a device capable of communicating with a terminal device. The network side device may be any device having a wireless transceiving function. Including but not limited to: a base station NodeB, an evolved node b, a base station (gbb) in the fifth generation (5G) communication system, a base station or a network side device in a future communication system, an access node in a WiFi system, a wireless relay node, a wireless backhaul node, and the like. The network side device may also be a wireless controller in a Cloud Radio Access Network (CRAN) scenario. The network side device may also be a small station, a Transmission Reference Point (TRP), or the like. The embodiment of the present application does not limit the specific technology and the specific device form adopted by the network side device.

The terminal device is a device with a wireless transceiving function, and can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; can also be deployed on the water surface, such as a ship and the like; and may also be deployed in the air, such as airplanes, balloons, satellites, and the like. The terminal device may be a mobile phone (mobile phone), a tablet computer (pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self-driving (self-driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like. The embodiments of the present application do not limit the application scenarios. A terminal device may also sometimes be referred to as a User Equipment (UE), an access terminal device, a UE unit, a mobile station, a remote terminal device, a mobile device, a terminal (terminal), a wireless communication device, a UE agent, a UE device, or the like.

The scheme of the application can be applied to an evolved UMTS terrestrial radio access network (E-UTRAN) and a new generation radio access network (NG-RAN) system. An exemplary overall E-UTRAN architecture is shown in FIG. 2. In fig. 2, the E-UTRAN consists of enbs, providing UE-oriented E-UTRA user plane and control plane protocol terminations. The enbs are interconnected via an X2 interface. The eNB is also connected to a Mobility Management Entity (MME) via an S1-MME interface and to a serving gateway (S-GW) via an S1-U interface.

In addition, the general architecture of the NG-RAN is shown in fig. 3. In fig. 3, the gNB provides NR user plane and control plane protocol terminals towards the UE, and the ng-eNB provides E-UTRA user plane and control plane protocol terminals towards the UE. The gNB and the NG-eNB are interconnected through an Xn interface, and the gNB and the NG-eNB are connected to a 5G core network (5) through an NG interface^thgeneration core，5GC)。

It should be noted that the terms "system" and "network" in the embodiments of the present application may be used interchangeably. The "plurality" means two or more, and in view of this, the "plurality" may also be understood as "at least two" in the embodiments of the present application. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone.

The first terminal acquires first information, the first information acquired by the first terminal is negotiated information, and the first terminal transmits data on the side link by using the first information, so that resource conflict with other terminals can be avoided, and reliability of side link communication is guaranteed.

Fig. 4 is a flowchart of a communication method provided in an embodiment of the present application, which illustrates:

s101, the first terminal obtains first information, illustratively, the first information includes one or more of a first partial Bandwidth (BWP), a first subcarrier space (SCS), a first transmission timing, and a first retransmission mode.

In this embodiment, the first terminal may be a transmitting terminal in the side link communication, or may be a receiving terminal in the side link communication. As shown in fig. 1, in-coverage UE1 and in-coverage UE2 may use either the mode1 resources or the mode2 resources for edge-link communications; the in-coverage UE1 and the out-of-coverage UE3 may communicate using preconfigured resources. When a terminal within the coverage area or a terminal outside the coverage area uses resources for data transmission of the side link, resource conflict with other terminals is avoided. Therefore, before performing the side link communication, the first terminal acquires available resource information of one or more of the following resources: BWP, SCS, transmission opportunity, retransmission mode.

As shown in fig. 5, the schematic diagram of BWP and/or SCS within one carrier, from the system perspective, the whole system may have multiple BWPs, and different UEs may operate on different BWPs, and these different BWPs may have different or same SCS. As shown in fig. 5, the carriers include BWP1, BWP2, BWP 3; the subcarrier spacing for BWP1 may be SCS1 and SCS4, the subcarrier spacing for BWP2 may be SCS1 to SCS4, and the subcarrier spacing for BWP3 may be SCS1 to SCS 4. Moreover, SCS in the same BWP may be time-varying, and duration of an SCS in different BWPs may also be different. Before the first terminal performs the side link communication, the first terminal needs to acquire usable BWP and SCS.

With respect to transmission opportunities, a transmission opportunity is used to indicate one or more of the following: the timing of the first terminal sending data to the network, the timing of the first terminal sending data on the side link, the timing of the first terminal receiving data sent by the network, the timing of the first terminal receiving data on the side link, or a flexible timing. The flexible timing may be configured flexibly to be any one of a timing at which the first terminal transmits data to the network, a timing at which the first terminal transmits data on the side link, a timing at which the first terminal receives data transmitted by the network, or a timing at which the first terminal receives data on the side link. The timing may be an absolute time, for example, an absolute time is indicated for the first terminal to send data to the network, or the first terminal sends data on the side link, or the first terminal receives data sent by the network, or the first terminal receives data on the side link; the occasion may also be a subframe (subframe), such as indicating a certain subframe or subframes for the first terminal to transmit data to the network, or for the first terminal to transmit data on the side link, or for the first terminal to receive data transmitted by the network, or for the first terminal to receive data on the side link; the occasion may also be a slot (slot), for example, to indicate that a certain slot or certain slots are used for the first terminal to transmit data to the network, or for the first terminal to transmit data on the side link, or for the first terminal to receive data transmitted by the network, or for the first terminal to receive data on the side link; the occasion may also be a symbol (symbol), such as indicating that a certain symbol or symbols are used for the first terminal to transmit data to the network, or for the first terminal to transmit data on the side link, or for the first terminal to receive data transmitted by the network, or for the first terminal to receive data on the side link. Before the first terminal performs the side link communication, the first terminal needs to determine the above transmission timing and acquire indication information about the transmission timing. In one implementation, the interval between the timing at which the first terminal transmits data to the network and the timing at which the first terminal transmits data on the side link is t, where t is not equal to 0.

With respect to retransmission modes, retransmission modes include feedback-based retransmissions and non-feedback-based retransmissions. Retransmission based on feedback means that the sending device needs to determine whether to perform data retransmission based on feedback of the receiving device, such as an existing hybrid automatic repeat request (HARQ), and if the receiving device feeds back a correct response (ACK), the sending device does not retransmit previously sent data; if the terminal device feeds back a non-acknowledgement (NACK), the transmitting device retransmits the previously transmitted data. Or defining a new feedback mechanism, such as using a Scheduling Request (SR)/Buffer Status Report (BSR) to indicate whether a resource requesting retransmission is used for retransmitting previous data or requesting a newly transmitted resource for transmitting new data; the non-feedback-based retransmission means that the transmitting device does not need to determine whether to perform data retransmission based on the feedback of the receiving device, for example, when new data is transmitted, the transmitting device directly transmits the data to be transmitted for multiple times without considering whether the receiving device receives the transmitted data. Optionally, the retransmission mode further includes a hybrid mode, that is, a hybrid mode of the above-mentioned feedback-based retransmission and non-feedback-based retransmission, for example, a feedback-based retransmission is used for newly transmitted data, and a non-feedback-based retransmission is used for retransmitted data. That is, when the sending device sends new data, it needs to wait for the feedback of the receiving device, the receiving device feeds back ACK, and the sending device does not retransmit the sent data; the receiving device feeds back NACK, and the transmitting device needs to retransmit the transmitted data. And when retransmitting the transmitted data, the receiving device does not wait for the feedback of the receiving device, but directly transmits the retransmitted data for a plurality of times. Alternatively, non-feedback-based retransmission is used for newly transmitted data and feedback-based retransmission is used for retransmitted data. Before performing side link communication, the first terminal needs to determine the above retransmission mode and acquire indication information about the above retransmission mode. For example, the network side device may be configured to the first terminal through Radio Resource Control (RRC) signaling, Downlink Control Information (DCI), or a system message, and specify an exemplary retransmission mode. Optionally, the network device may configure the transmission mode to the first terminal in an implicit or explicit manner. So-called explicit means, for example, the network tells the first terminal device directly which feedback-based retransmission, non-feedback-based retransmission, or hybrid mode to use. For example, when the network allocates new transmission resources to the terminal device (resources for new data transmission), if multiple resources are allocated for transmitting new transmission data, it is considered to configure the first terminal device to perform non-feedback-based retransmission; otherwise, if the network only configures one resource for transmitting the newly transmitted data, it is considered to configure the first terminal device for retransmission based on feedback. Or, the terminal device autonomously determines, for example, according to a currently performed service, for example, a service with a sensitive delay requirement may use a retransmission that is not based on feedback, a service with an insensitive delay requirement may use a retransmission that is based on feedback; or, a service with low reliability requirement uses non-feedback-based retransmission, a service with high reliability requirement uses feedback-based retransmission, and the like.

Regarding the first terminal obtaining the first information, in one implementation, for example, the second terminal may send the first information to the first terminal, and the first terminal receives the first information. For example, in a unicast scenario, the second terminal receives data sent by the first terminal as a unicast receiving device, and the second terminal may inform the first terminal of the first information, where the first information includes one or more of BWP, SCS, transmission timing, and retransmission mode described above. Thus telling the first terminal that the second terminal expects the first terminal device to use the relevant parameters, such as partial bandwidth, subcarrier spacing, transmission opportunity, or retransmission mode, etc. Of course, the implementation is not limited to the unicast scenario, but may also be a broadcast or multicast scenario.

In another implementation, the network-side device may send the first information to the first terminal, and the first terminal receives the first information. For example, in a broadcast scenario, the first terminal serves as a sending terminal, and the network device may determine, according to configuration information used when the second terminal sends a broadcast, configuration information used by the first terminal to send the broadcast, and send, to the first terminal, the configuration information used by the first terminal to send the broadcast, where the first information includes one or more of BWP, SCS, transmission timing, and retransmission mode described above. Of course, the implementation is not limited to a broadcast scenario, but may also be a unicast or multicast scenario, or a scenario combining broadcast, unicast and multicast. It should be noted that the second terminal may refer to a specific device, or may refer to one or more other terminal devices besides the first terminal, without referring to a specific device.

S102, the first terminal transmits data on a side link based on first information, wherein the side link is a wireless communication link between the first terminal and a second terminal.

Illustratively, after the first terminal obtains the above-mentioned explicit indication information about one or more of BWP, SCS, transmission timing, and retransmission mode, the first terminal performs data transmission on the side link based on the information, so as to avoid resource collision with other terminals and ensure reliability of side link communication.

The transmission data refers to transmission and reception data, that is, may be transmission data or reception data.

According to the communication method provided by the application, the first terminal obtains the first information, which may be synthetically determined information, for example, the first information determined by the first terminal in combination with the configuration information used by the first terminal itself and the second terminal device, or the first information synthetically determined by the network device in combination with the configuration information used by the first terminal and the second terminal device and told to the first terminal, and the first terminal uses the first information to transmit data on the side link, so that resource conflict with other terminals can be avoided.

Fig. 6 is a schematic flowchart of another communication method provided in the embodiment of the present application, which illustrates:

s201, the first terminal sends third information to the network side equipment.

Correspondingly, the network side device receives the third information.

Illustratively, a first terminal is to communicate with a second terminal on a side-link, and the first terminal may also be performing side-link communication with other terminals, and generally, on one carrier, the first terminal can only transceive on one BWP at the same time and can only transceive using one SCS. Taking SCS as an example, if two sending terminals simultaneously use different SCS to send data to one receiving terminal, then the receiving terminal can only select the data of one sending terminal to receive, which causes waste, wastes the power consumption of the sending terminal, and wastes resources. Similar problems exist with respect to the use of BWP, transmission timing, retransmission mode, and the like.

In this embodiment, the first terminal may send third information to the network side device, and notify the network side device of one or more of a third partial bandwidth, a third subcarrier interval, a third transmission opportunity, and a third retransmission mode used by the network side device to communicate with other terminals.

As another implementation, the first terminal may also send the third information to the second terminal, so that the second terminal avoids resource collision with the third information when acquiring the resource.

The third information may be configuration information that the first terminal is using for side link communication with another terminal device, or may be configuration information that the first terminal is about to use or is scheduled to use for side link communication with another terminal device. Here, the configuration information may include one or more of a fractional bandwidth, a subcarrier spacing, a transmission opportunity, or a retransmission mode.

S202, the network side equipment sends first information to the first terminal.

Accordingly, the first terminal receives the first information.

For example, after receiving the third information, the network side device configures the first information according to the third information when configuring the first information. Generally, the first part of bandwidth, the first subcarrier interval, the first transmission opportunity and the first retransmission mode included in the first information are configured to be different from the third part of bandwidth, the third subcarrier interval, the third transmission opportunity and the third retransmission mode included in the third information, respectively, so as to avoid collision. Of course, the first part of bandwidth, the first subcarrier interval, the first transmission opportunity, and the first retransmission mode included in the first information may also be the same as the third part of bandwidth, the third subcarrier interval, the third transmission opportunity, and the third retransmission mode included in the third information. For example, if the ongoing service 1 of the first terminal uses the subcarrier spacing SCS1, and if the upcoming service 2 of the first terminal device also requires or may use the subcarrier spacing SCS1, then the network-side device configures the subcarrier spacing SCS1 (included in the first information) to the first terminal device, so that the first terminal device processes the upcoming service 2 using the subcarrier spacing SCS 1. Other parameters, such as fractional bandwidth, transmission opportunities, retransmission modes, etc., are also similar. Namely: the first part of bandwidth, the first subcarrier interval, the first transmission opportunity, the first retransmission mode included in the first information and the third part of bandwidth, the third subcarrier interval, the third transmission opportunity, and the third retransmission mode included in the third information are not limited in this application to be the same or different.

Optionally, step S201 may be replaced by: the step S202 of the first terminal sending the third information to the second terminal may be replaced by: and after the second terminal receives the third information, the second terminal generates the first information according to the third information, and the second terminal sends the first information to the first terminal.

And S203, the first terminal transmits data on the side link based on the first information.

Because the network side device avoids resource conflict when configuring the first information, the first terminal can ensure the reliability of communication when performing data transmission on the side link based on the first information.

As shown in fig. 7, a schematic diagram of an edge link communication scenario, in a unicast scenario, if a first terminal in a connected state in a coverage area communicates with a second terminal using a mode1 resource and communicates with a third terminal using a mode2 resource, there is a problem that BWP does not match, because the BWP of the mode2 resource and the BWP of the mode1 resource may not be the same or overlap.

Illustratively, the first terminal sends the third information to the network-side device, and the first terminal feeds back information of the mode2 resource pool it is using to the network-side device, so that the network-side device avoids the time when the first terminal communicates with the third terminal when scheduling resources of mode1 (configuring the first information) for communicating with the second terminal (e.g., if the BWP1 used by the first terminal for communicating with the second terminal is different from the BWP2 used for communicating with the first terminal and the third terminal), or schedules the mode1 resources for communicating with the first terminal and the second terminal on the BWP used for communicating with the third terminal (e.g., so that the BWP1 used by the first terminal for communicating with the second terminal is the same as the BWP2 used for communicating with the first terminal and the third terminal). Thus, when the first terminal and the second terminal perform side link communication according to the first information, the information conflict with the mode2 resource pool in use by the first terminal can be avoided, and the reliability of side link communication with the second terminal can be ensured.

Optionally, the first terminal may also feed back information of the mode1 resource it uses to the third terminal, so that the third terminal may switch with the first terminal to the BWP on which the first terminal communicates with the second terminal and perceive or compete for the mode2 resource on the BWP.

For simplicity and brevity, the above description is only given by way of example of BWP. It should be noted that, for the present application, other parameters, such as the subcarrier spacing, the transmission timing, or the retransmission mode, described by way of example with BWP, may be applied as well, unless otherwise specified.

As shown in another schematic diagram of an edge link communication scenario in fig. 8, in a unicast scenario, a second out-of-coverage terminal communicates with a first in-coverage terminal, and whether the first in-coverage terminal is in a connected state or a disconnected state, there may be a problem because BWP, SCS, transmission timing, retransmission mode preconfigured outside the coverage range and BWP, SCS, transmission timing, retransmission mode used by the first in-coverage terminal may be different.

The first terminal periodically monitors the pre-configured resources to complete the discovery and connection establishment of the second terminal. Here, the listening period may be preconfigured, or may be configured by the network side device, including the listening period and the duration of each listening.

Since the second terminal uses the pre-configured resource, the first terminal needs to communicate with the second terminal on the pre-configured resource. Therefore, the first terminal transmits the third information to the network-side device, informing the network-side device of BWP, SCS, transmission timing, retransmission mode, etc. to be used by the first terminal to communicate with the second terminal, so that the network can avoid collision with the BWP, SCS, transmission timing, or retransmission mode to be used by the first terminal and the second terminal when allocating the mode1 or mode2 resource to the first terminal. Optionally, the first terminal may also send the third information to the second terminal, and notify the first terminal device of BWP, SCS, transmission timing, and retransmission mode used when communicating with other devices other than the second terminal device using the resources in the coverage, so that when the second terminal sends data to the first terminal, or listens to the data sent by the first terminal, the time when the first terminal communicates with other terminal devices in the coverage may be avoided, and unnecessary reception or transmission is avoided.

After the first terminal sends the third information to the network side equipment, the network side equipment sends the first information to the first terminal. Illustratively, the first information includes one or more of a first fractional bandwidth, a first subcarrier spacing, a first transmission opportunity, and a first retransmission mode. Illustratively, after the first terminal informs the network-side device of BWP, SCS, transmission timing, retransmission mode, etc. of the first terminal communicating with the second terminal, the network-side device may configure the first information, configure the first partial bandwidth used by the first terminal, the first subcarrier spacing, the first transmission timing, and the first retransmission mode to be respectively the same as the second partial bandwidth used by the second terminal, the second subcarrier spacing, the second transmission timing, and the second retransmission mode. Alternatively, when scheduling the resource of the mode1 for the first terminal device and the other terminal devices to communicate, the network side device may avoid the time when the first terminal device communicates with the second terminal device, which is indicated in the third information, so that the first terminal device may simultaneously receive the data sent by the second terminal device outside the coverage and receive the data sent by the other terminal devices inside the coverage, or so that the first terminal device may simultaneously send the data to the second terminal device outside the coverage and send the data to the other terminal devices inside the coverage.

According to the communication method provided by the application, the first terminal acquires the first information, the first information is comprehensively determined information, and the first terminal transmits data on the side link by using the first information, so that resource conflict with other terminals can be avoided.

Fig. 9 is a flowchart of another communication method provided in the embodiment of the present application, which illustrates:

s301, the first terminal monitors information of the broadcast service in a predetermined first period.

Generally, on one carrier, a first terminal can only transmit and receive on one BWP at the same time, and can only use one SCS to transmit and receive, and then the first terminal listens to whether other terminal devices are already transmitting or receiving the same broadcast before transmitting or receiving a certain broadcast service.

S302, the first terminal sends fourth information to the network side equipment.

Correspondingly, the network side device receives the fourth information.

The first terminal needs to select the broadcast service data transmission on the same BWP as other terminal devices that have transmitted or received the broadcast service.

Illustratively, the fourth information includes information of the broadcast service that the first terminal hears. That is, when the first terminal monitors the broadcast service of interest, the first terminal may notify the network side device of the monitored information of the broadcast service, so that the network side device knows that other terminal devices are also transmitting the broadcast service, and it is necessary to avoid a conflict with resources used by the broadcast service. Optionally, the first terminal may further send the fourth information to the second terminal. Accordingly, the second terminal receives the fourth information.

S303, the network side equipment sends the first information to the first terminal.

Accordingly, the first terminal receives the first information.

After receiving the fourth information, the network side device may generate the first information according to the fourth information.

Optionally, in another implementation, in step S302, the first terminal may also send the fourth information to the second terminal, and the second terminal generates the first information according to the fourth information, then step S303 may be that the second terminal sends the first information to the first terminal, and the first terminal receives the first information.

The step S101 of the embodiment shown in fig. 4 can be referred to for specific implementation of the step S303.

Optionally, after the first terminal monitors the information of the broadcast service in the predetermined first period, that is, after step S301, the first terminal may not perform steps S302 and S303, but itself acquires the first information according to the fourth information.

Exemplarily, in the foregoing broadcast scenario, if the first terminal is a sending end device, it is necessary to determine the first information used by the first terminal, that is, to coordinate resources used by the first terminal. If the first terminal is in the non-connected state, the first terminal may select the BWP transmitted by the broadcast service according to the configuration of the system message, or pre-configuration. Of course, this scheme may also be used when the first terminal is in the connected state. In addition, if the first terminal is in the connected state, the first terminal may monitor the sending condition of the nearby broadcast service before sending the broadcast service, and tell the network side device that the first terminal has monitored the sending condition of the broadcast service. Such as whether a certain broadcast service or services are listened to, BWP and/or SCS list of the listened broadcast services. After receiving the information, the network side device instructs the first terminal to send BWP and/or SCS information of the specific broadcast service. The first terminal monitors the sending condition of the broadcast service and reports the monitored condition of the broadcast service to the network side device, which may be performed periodically. The periodicity may be network device configured, e.g., through dedicated signaling, messages, or system message configuration such as RRC signaling, DCI, etc. The period may be preconfigured for the first terminal out of coverage. The first terminal reports the broadcast service listening status to the network side device, which may use RRC dedicated signaling or may use terminal auxiliary information (UEAssistanceInformation). Certainly, the first terminal in the non-connected state may specifically establish an RRC connection for reporting the information, and at this time, the first terminal may notify the network side device of the detected broadcast service information through an RRC connection establishment message, such as a random access message 3 or a message 4.

Optionally, the first terminal that is already broadcasting may adjust the relevant parameters used by itself. For example, it may be periodically monitored whether other terminal devices are transmitting the same broadcast service, and if so, and the frequency position of the BWP used by itself is higher/lower than the frequency position of the BWP used by other terminal devices transmitting the same broadcast service, the BWP used by itself is adjusted to ensure that the same BWP is used by other terminal devices. In this case, the first terminal may select BWP before sending the broadcast service, and perform BWP coordination in the subsequent broadcast process.

For example, in the foregoing broadcast scenario, if the first terminal is a receiving end device, it is also necessary to determine the first information used by the first terminal, that is, to coordinate the resources used by the first terminal. The first terminal periodically listens to the broadcast service of interest for the first terminal in the whole carrier bandwidth, obtains information of the broadcast service, such as the BWP where the broadcast service is located and/or the period of the broadcast service, and informs relevant nodes of the information, such as: telling the network side device scheduling the mode1 resource so that the network side device can schedule the mode1 resource to the BWP of the first terminal for receiving the broadcast service at the time point of the first terminal receiving the broadcast service; or telling the correspondent device using the pre-configured resource or the mode2 resource in the system message, so that the correspondent device avoids communicating with the first terminal when the first terminal receives the broadcast service, or switching to BWP on which the first terminal receives the broadcast service.

For an exemplary procedure of the first terminal informing the network side device, refer to the above description.

The method for the first terminal to tell the opposite communication terminal device is as follows:

if the first terminal already has a link with the third terminal or the fourth terminal (i.e., the first terminal is capable of transmitting data to the third/fourth terminal) before the first terminal communicates with the second terminal using the mode1 resource scheduled by the network-side device, the first terminal transmits BWP and/or SCS information used for the first terminal to communicate with the second terminal to the third/fourth terminal after determining the BWP and/or SCS to communicate with the second terminal.

If the first terminal does not have a link with the third terminal or the fourth terminal (i.e., the first terminal cannot transmit data to the third terminal/the fourth terminal) before the first terminal communicates with the second terminal using the mode1 resource scheduled by the network-side device, the link with the third terminal or the fourth terminal is established, and then BWP and/or SCS information used for the communication between the first terminal and the second terminal is transmitted to the third terminal/the fourth terminal. For example, when the first terminal uses the mode1 resource scheduled by the network-side device and the second terminal, the first terminal periodically discovers other terminal devices, such as the third terminal or the fourth terminal, on the resource configured by the system message or on the pre-configured resource, then establishes a connection with the third terminal/the fourth terminal (the connection establishment process is processed additionally), and then sends the BWP and/or SCS information used for the communication between the first terminal and the second terminal to the third terminal/the fourth terminal in a unicast manner. Alternatively, the first terminal broadcasts the BWP/SCS used by the first terminal to communicate with other terminal devices using mode1 on a system message configured resource or a pre-configured resource.

S304, the first terminal transmits data on the side link based on the first information.

The step S304 can be realized by referring to the step S102 of the embodiment shown in fig. 4.

According to the communication method provided by the embodiment of the application, in a broadcast scene, if a first terminal monitors that other terminal devices send the same broadcast service, the first terminal informs a network side device of resource information used by the other terminal devices for sending the broadcast service, so that the network side device adopts the same resource as the other terminal devices when configuring the first information for the first terminal, resource collision is avoided, and reliability of side link communication is ensured.

Fig. 10 is a flowchart of another communication method provided in the embodiment of the present application, which illustrates:

s401, the network side equipment sends a first message to the first terminal.

Accordingly, the first terminal receives the first message.

As another side link communication diagram shown in fig. 11, in a unicast scenario, if two terminal devices in coverage area reside in different cells, for example, a first terminal is located in a first cell (e.g., cell 1 shown in fig. 11), and a second terminal is located in a second cell (e.g., cell 2 shown in fig. 11), if common configurations of the two cells are different, there may be a problem in communication between the two terminal devices.

In this embodiment, the network side device may send a first message to the first terminal, where the first message includes a common configuration of the first cell and the second cell, and the common configuration includes partial bandwidth information. Illustratively, when the first terminal is in an idle state, the network side device may send the public configuration through a system message; when the first terminal is in the connected state, the network side device may send the common configuration through RRC signaling or DCI message, etc.

S402, the first terminal establishes connection with the second terminal by using the public configuration.

After receiving the common configuration, the first terminal may complete discovery of the second terminal on the common BWP and establish a connection with the second terminal.

And S403, the second terminal sends the second information to the first terminal.

Accordingly, the first terminal receives the second information.

Taking the case of avoiding the BWP configuration conflict as an example, the second terminal informs the first terminal of the BWP used by the second terminal for communicating with other terminal devices in the second cell, so that when the first terminal performs edge-link communication with the second terminal, the time (transmission timing) when the second terminal communicates with other terminal devices in the second cell may be avoided, or the first terminal may adjust to the BWP where the second terminal communicates with other terminal devices in the second cell to communicate with the second terminal.

The second terminal may then send second information to the first terminal, illustratively including one or more of a second fractional bandwidth used by the second terminal, a second subcarrier spacing, a second transmission opportunity, and a second retransmission mode.

In some embodiments, as an alternative to S403, the network-side device may send the second information to the first terminal.

S404, the first terminal determines first information according to the second information.

After the first terminal acquires the second information used by the second terminal, the first information may be determined according to the second information. The first information includes one or more of a first fractional bandwidth used by the first terminal, a first subcarrier spacing, a first transmission opportunity, and a first retransmission mode.

Generally, a first part of bandwidth used by a first terminal is different from a second part of bandwidth used by a second terminal, and a first subcarrier interval used by the first terminal is different from a second subcarrier interval used by the second terminal, so as to avoid collision with the second terminal; the first terminal and the second terminal adopt consistent transmission opportunity and retransmission mode to ensure normal communication of the side link.

S405, the first terminal transmits data on the side link based on the first information.

After the first information is determined, the first terminal performs data transmission on the side link based on the first information, so that resource conflict with the second terminal can be avoided, and the reliability of communication is ensured.

According to the communication method provided by the embodiment of the application, the first terminal determines the first information used by the first terminal according to the second information used by the second terminal, so that resource conflict with the second terminal can be avoided, and the reliability of communication is ensured.

It is assumed that the first terminal and the second terminal are in unicast communication, and meanwhile, the second terminal is interested in a certain broadcast service, how to coordinate unicast communication and broadcast service reception is avoided, and interruption of the ongoing unicast communication is avoided.

Fig. 12 is a flowchart of another communication method provided in the embodiment of the present application, which illustrates:

s501, the second terminal sends fifth information to the first terminal.

Accordingly, the first terminal receives the fifth information.

In this embodiment, the second terminal and the first terminal are in unicast communication, and meanwhile, the second terminal searches for an interested broadcast service. A second period may be set, which may be a maximum search period T, and a search duration may also be set. The second terminal may select to search in a period less than or equal to T, where the search duration is the search duration. The second period and the search duration may be determined by the second terminal itself, and notify the network side device; the second terminal may also be configured with the second period and the search duration by the network side device.

The second terminal monitors the information of the broadcast service in the predetermined second period and sends the information to the first terminal. Illustratively, the second terminal sends fifth information to the first terminal, illustratively, the fifth information is information of a broadcast service that the second terminal listens to in a predetermined second period, and the information of the broadcast service includes: the broadcast service uses one or more of a partial bandwidth, a subcarrier interval, a transmission opportunity and a retransmission mode. In addition, if the broadcast service is periodically transmitted, the second terminal may further acquire periodic information of the broadcast service in which the second terminal is interested.

The fifth information may further include the search period T and the search duration. So that the first terminal device can determine the second information in conjunction with the time instant of the second terminal device search.

And S502, the first terminal determines second information according to the fifth information.

The first terminal may determine second information according to the received fifth information, for example, the second information includes one or more of a second fractional bandwidth used by the second terminal, a second subcarrier spacing, a second transmission opportunity, and a second retransmission mode. Namely, the first terminal determines the second information used by the second terminal for receiving the broadcast service and performing unicast communication with the first terminal according to the fifth information.

S503, the first terminal determines the first information according to the second information.

The first terminal performs unicast communication with the second terminal, and resource conflict with the second terminal needs to be avoided. The first terminal determines the first information according to the second information used by the second terminal. Illustratively, the first information includes one or more of a first fractional bandwidth, a first subcarrier spacing, a first transmission opportunity, and a first retransmission mode.

Generally, the first fractional bandwidth, the first subcarrier spacing, the first transmission opportunity, and the first retransmission mode may be respectively the same as the BWP, SCS, transmission opportunity, and retransmission mode used by the broadcast service monitored by the second terminal, for example, the first terminal jumps to the BWP where the second terminal is going to receive the broadcast service to continue unicast communication. The first partial bandwidth, the first subcarrier interval, the first transmission timing, and the first retransmission mode may also be different from the BWP, SCS, transmission timing, and retransmission mode used by the broadcast service monitored by the second terminal, respectively, and the first terminal needs to interrupt unicast communication on the current BWP.

And S504, the first terminal transmits data on the side link based on the first information.

If the first terminal jumps to the BWP on which the second terminal is going to receive the broadcast service to continue the unicast communication, the first terminal performs the unicast communication with the second terminal on the side link based on the determined first information, and the conflict between the unicast communication and the broadcast service received by the second terminal is also avoided.

According to a communication method provided by the embodiment of the present application, if a second terminal performing unicast communication with a first terminal wants to receive a broadcast service at the same time, when determining first information, information collision with the received broadcast service needs to be avoided, so as to ensure reliability of side link communication.

Fig. 13 is a flowchart of another communication method provided in the embodiment of the present application, which illustrates:

s601, the network side equipment sends sixth information to the first terminal.

Accordingly, the first terminal receives the sixth information.

The network side device may pre-configure a mapping relationship between one or more broadcast services and the first information, for example, configure a mapping relationship between one or more broadcast service identifiers and the first information.

In this embodiment, when the first terminal is in a network coverage and the first terminal is in an idle state, the network side device may send the sixth information through a system message. Illustratively, the sixth information includes first information used for broadcasting, or a mapping relationship between a broadcast service identifier and the first information. Illustratively, the first information used in the broadcast refers to first information used in a specific broadcast, and the first information includes one or more of the first BWP, the first SCS, the first transmission timing, and the first retransmission mode; the mapping relationship refers to a mapping relationship between one or more broadcast service identifiers and the first information. Of course, the sixth information is not limited to include the first information corresponding to the broadcast service, and may be the first information corresponding to the unicast or multicast service.

When the first terminal is in the network coverage and the first terminal is in the connected state, the network side device may send the sixth information through a dedicated signaling, for example, an RRC signaling or a DCI message.

When the first terminal is out of the network coverage, the network side device may pre-configure a mapping relationship between the broadcast service identifier and the first information, or pre-configure the first information used by a certain broadcast.

And S602, the first terminal determines the first information according to the sixth information.

When the sixth information includes the first information used for broadcasting, the first terminal may determine, according to the sixth information, that the first information used for broadcasting is the first information.

When the sixth information includes a mapping relationship between one or more broadcast service identifiers and the first information, the first terminal may determine, according to the broadcast service identifier, the first information corresponding to the broadcast service identifier.

S603, the first terminal transmits data on the side link based on the first information.

After the first terminal definitely determines the first information according to the sixth information, data transmission is performed on the side link based on the first information, so that resource conflict with other terminals can be avoided, and reliability of side link communication is ensured.

According to the communication method provided by the application, the first terminal can definitely determine the first information through the mapping relation between the broadcast service identifier and the first information or the indicated first information used by specific broadcast, and the first terminal uses the first information to transmit data on the side link, so that resource conflict with other terminals can be avoided, and the reliability of side link communication is ensured.

Fig. 14 is a flowchart of another communication method according to an embodiment of the present application, which is applicable to a scenario in which a first terminal may simultaneously transmit and receive data on one or more BWPs and using one or more SCS. Illustratively, the method:

s701, the first terminal obtains a pre-configuration list.

For broadcast services, since the broadcast services are not specific to a specific UE, and the transmission of the broadcast services is known to all relevant UEs, the present embodiment sets a preconfigured list, which illustratively includes one or more configurations for indicating one or more parameters of partial bandwidth, subcarrier spacing, transmission timing, and retransmission mode.

Taking the BWP configuration as an example, for the pre-configured resource out of the coverage, BWP information for the broadcast service may be pre-configured. For example, all BWPs may be configured for broadcast service, or part of BWPs may be configured for specific broadcast service (such as BWP ID and association of broadcast service ID), or specific BWPs may be used for specific set of UEs (such as UE ID partition) to perform broadcast of specific broadcast service. For UEs within coverage, the resource of mode2 is broadcast in a system message, and the network-side device may define system-level BWP information, and the BWP information for the broadcast service, such as all BWPs may be used for the broadcast service, or part of BWPs may be used for a specific broadcast service (such as BWP id and broadcast service id association).

As shown in fig. 15, a schematic diagram of a BWP pre-configuration pattern (pattern) is configured with N BWP patterns of BWP 1-BWPN. For example, for the resource pre-configuration mode, the resource pre-configured for the UE outside the coverage area is divided into N BWPs, and the BWPs are set as different patterns; for another example, for the resource configuration mode using mode1, the resource pool configurable BWP is divided into N BWPs, and the BWPs are set as different patterns. When the broadcast service is performed, any one of the N patterns may be used for the broadcast service.

S702, the first terminal determines a configuration in the pre-configuration list according to one or more of the broadcast service identification, the sending time and the broadcast service quantity, and determines the first information according to the determined configuration.

After the first terminal within the coverage acquires the BWP configuration information related to the broadcast service of mode2, or the BWP information related to the broadcast service on the preconfigured resource, or after the first terminal outside the coverage acquires the BWP information related to the broadcast service on the preconfigured resource, it determines the BWP to receive the specific broadcast service at the specific moment.

For example, in one implementation, one of the above pre-configurations may be determined using one or more parameters of a broadcast service identifier, a time for transmitting the broadcast service, a number of transmitted broadcast services, and an identifier of a terminal device transmitting the broadcast service, and the configuration is configured to indicate one or more parameters of a partial bandwidth, a subcarrier interval, a transmission opportunity, and a retransmission mode, so that the first information may be determined according to the determined configuration.

In another implementation, the first terminal is a specific UE, and the broadcast-specific BWP of the specific UE is fixed, for example, a specific BWP may be determined according to the broadcast service identification, the number of BWPs, and the identification of the first terminal transmitting the broadcast service.

For the resource allocation manner of mode1, the network-side device may dynamically schedule the first terminal to receive a specific broadcast service sent by a specific UE on a specific BWP at a specific time. For example, UE information of the broadcast service is transmitted by DCI indicating BWP information, broadcast service information, and time information for receiving the broadcast service; also, the network side device may dynamically control BWP of the transmitting UE for transmitting the broadcast service.

In one example, assuming that the out-of-coverage terminal device employs a pre-configured BWP pattern as shown in fig. 10, i.e., the out-of-coverage UE can broadcast with frequency hopping, it is calculated which BWP to broadcast on at this time according to the broadcast identification, transmission time and the number of BWPs, for example. For a first terminal in the coverage area to listen to the broadcasted traffic outside the coverage area, all BWPs shown in fig. 15 can be searched using frequency hopping; the first terminal may also calculate on which BWP to search according to the above-described calculation method.

And S703, the first terminal transmits data on the side link based on the first information.

After searching for a BWP on which a broadcast service is transmitted, the first terminal receives data transmitted on the BWP by the transmitting terminal.

According to the communication method provided by the embodiment of the application, the first terminal obtains the pre-configuration list of the resources, determines an exemplary resource configuration according to the related parameters of the specific broadcast service, and performs the side link communication according to the resource configuration, so that resource conflict with other terminals can be avoided, and the reliability of the side link communication is ensured.

The method of the embodiments of the present application is set forth above in detail and the apparatus of the embodiments of the present application is provided below.

Based on the same concept of the communication method in the foregoing embodiment, as shown in fig. 16, an embodiment of the present application further provides a communication device 100, where the communication device 100 is applicable to the communication methods shown in fig. 4, 6, 9, 10, and 12 to 14. The communication apparatus 100 may be the terminal device shown in fig. 1, or may be a component (e.g., a chip) applied to the terminal device. The communication device 100 includes a processing unit 11 and a transceiving unit 12; the following are exemplary:

a processing unit 11, configured to obtain first information, where the first information includes one or more of a first partial bandwidth, a first subcarrier interval, a first transmission opportunity, and a first retransmission mode;

a transceiver unit 12, configured to perform data transmission on a side link based on the first information, where the side link is a wireless communication link between the first terminal and the second terminal.

In one implementation, the transceiver unit 12 is further configured to receive the first information from a network-side device; alternatively, the first and second electrodes may be,

the transceiver unit 12 is further configured to receive the first information from the second terminal.

In another implementation, the processing unit 11 is further configured to obtain second information of the second terminal, where the second information includes one or more of a second partial bandwidth used by the second terminal, a second subcarrier interval, a second transmission opportunity, and a second retransmission mode;

the processing unit 11 is further configured to determine the first information according to the second information.

In yet another implementation, the transceiver unit 12 is further configured to receive the second information from a network-side device; alternatively, the first and second electrodes may be,

the transceiver unit 12 is further configured to receive the second information from the second terminal.

In yet another implementation, the transceiver unit 12 is further configured to send third information to the network-side device; or

The transceiver unit 12 is further configured to send third information to the second terminal;

wherein the third information includes one or more of a third fractional bandwidth, a third subcarrier interval, a third transmission opportunity, and a third retransmission mode used by the first terminal.

In yet another implementation, the first terminal is located in a first cell and the second terminal is located in a second cell;

the transceiver component 12 is further configured to receive a first message, where the first message includes a common configuration of the first cell and the second cell;

the transceiving unit 12 is further configured to establish a connection with the second terminal using the common configuration.

In yet another implementation, the transceiver unit 12 is further configured to receive fifth information sent by the second terminal, where the fifth information is information of a broadcast service monitored by the second terminal in a predetermined second period, and the information of the broadcast service includes: one or more of partial bandwidth, subcarrier interval, transmission opportunity and retransmission mode used by the broadcast service;

the processing unit 11 is further configured to determine the second information according to the fifth information.

In yet another implementation, the processing unit 11 is further configured to obtain sixth information, where the sixth information includes the first information used for broadcasting or a mapping relationship between a broadcast service identifier and the first information;

the processing unit 11 is further configured to determine the first information according to the sixth information.

In yet another implementation, the processing unit 11 is further configured to obtain a preconfigured list, where the preconfigured list includes one or more configurations for indicating one or more parameters of partial bandwidth, subcarrier spacing, transmission opportunity, retransmission mode;

the processing unit 11 is further configured to determine a configuration according to one or more of a broadcast service identifier, a sending time, and a broadcast service number, and determine the first information according to the determined configuration.

More detailed descriptions about the processing unit 11 and the transceiver unit 12 may be obtained by referring to the description about the first terminal in the method embodiments shown in fig. 4, fig. 6, fig. 9, fig. 10, and fig. 12 to fig. 14, which is not repeated herein. The transmitting/receiving unit may be an integrated device having a transmitting/receiving function, or may be an independent receiving unit having a receiving function and a transmitting unit having a transmitting function, and may be logically referred to as a "transmitting/receiving unit".

According to the communication device provided by the embodiment of the application, the communication device acquires the first information, the acquired first information is the comprehensively determined information, and the communication device transmits data on the side link by using the first information, so that resource conflict with other terminals can be avoided, and the reliability of side link communication is ensured.

Based on the same concept of the communication method in the foregoing embodiment, as shown in fig. 17, the present embodiment further provides a communication apparatus 200, and the communication apparatus 200 may be applied to the communication methods shown in fig. 4, 6, 9, 10, and 12 to 14. The communication apparatus 200 may be a network side device as shown in fig. 1, or may be a component (e.g., a chip) applied to the network side device. The communication apparatus 200 includes a processing unit 21 and a transmitting/receiving unit 22; the following are exemplary:

a processing unit 21, configured to generate first information, where the first information includes one or more of a first fractional bandwidth used by the first terminal, a first subcarrier interval, a first transmission opportunity, and a first retransmission mode

A transceiving unit 22, configured to send the first information to the first terminal.

In one implementation, the transceiver unit 22 is further configured to receive second information of a second terminal, where the second information includes one or more of a second fractional bandwidth used by the second terminal, a second subcarrier spacing, a second transmission opportunity, and a second retransmission mode.

In another implementation, the transceiver unit 22 is further configured to receive third information from the first terminal, where the third information includes one or more of a third fractional bandwidth, a third subcarrier spacing, a third transmission opportunity, and a third retransmission mode used by the first terminal.

In yet another implementation, the first terminal is located in a first cell and the second terminal is located in a second cell; the transceiver unit 22 is further configured to send a first message to the first terminal, where the first message includes a common configuration of the first cell and the second cell.

In yet another implementation, the transceiver unit 22 is further configured to transmit sixth information to the first terminal, where the sixth information includes the first information used for broadcasting or a mapping relationship between a broadcast service identifier and the first information.

The more detailed description about the processing unit 21 and the transceiver unit 22 can be obtained by referring to the description about the network-side device in the method embodiments shown in fig. 4, fig. 6, fig. 9, fig. 10, and fig. 12 to fig. 14, which is not repeated herein. The transmitting/receiving unit may be an integrated device having a transmitting/receiving function, or may be an independent receiving unit having a receiving function and a transmitting unit having a transmitting function, and may be logically referred to as a "transmitting/receiving unit".

According to the communication device provided by the embodiment of the application, the first information is sent to the first terminal, and the first information is comprehensively determined information, so that the first terminal transmits data on the side link by using the first information, resource conflict with other terminals can be avoided, and reliability of side link communication is ensured.

The embodiment of the application also provides a communication device, and the communication device is used for executing the communication method. Some or all of the above communication methods may be implemented by hardware or may be implemented by software.

Alternatively, the communication device may be a chip or an integrated circuit when embodied.

Optionally, when part or all of the communication method of the foregoing embodiment is implemented by software, the communication apparatus includes: the processor is used for executing the program, when the program is executed, the communication device can realize the communication method provided by the above embodiment, the communication device can also comprise a memory for storing necessary programs, and the related programs can be loaded into the memory when the communication device leaves the factory, and can also be loaded into the memory when needed at a later time.

Alternatively, the memory may be a physically separate unit or may be integrated with the processor.

Alternatively, when part or all of the communication method of the above embodiments is implemented by software, the communication apparatus may include only a processor. The memory for storing the program is located outside the communication device and the processor is connected to the memory by means of a circuit/wire for reading and executing the program stored in the memory.

The processor may be a Central Processing Unit (CPU), a Network Processor (NP), or a combination of a CPU and an NP.

Alternatively, the processor may comprise a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. The PLD may be a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), a General Array Logic (GAL), or any combination thereof.

The memory may include volatile memory (volatile memory), such as random-access memory (RAM); the memory may also include a non-volatile memory (non-volatile) such as a flash memory (flash memory), a Hard Disk Drive (HDD) or a solid-state drive (SSD); the memory may also comprise a combination of memories of the kind described above.

Fig. 18 shows a simplified schematic diagram of a terminal device. For ease of understanding and illustration, in fig. 18, the terminal device is exemplified by a mobile phone. As shown in fig. 18, the terminal device includes a processor, and may further include a radio frequency circuit, an antenna, and an input-output device. The processor may be configured to process a communication protocol and communication data, and may be further configured to control the terminal device, execute a software program, process data of the software program, and the like. The terminal device may further comprise a memory, which is mainly used for storing software programs and data, and these related programs may be loaded into the memory at the time of shipment of the communication apparatus, or may be loaded into the memory at a later time when needed. The radio frequency circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are used primarily for receiving data input by a user and for outputting data to the user. It should be noted that some kinds of terminal devices may not have input/output devices.

When data needs to be sent, the processor performs baseband processing on the data to be sent and outputs baseband signals to the radio frequency circuit, and the radio frequency circuit performs radio frequency processing on the baseband signals and sends the radio frequency signals to the outside in the form of electromagnetic waves through the antenna. When data is sent to the terminal equipment, the radio frequency circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data. For ease of illustration, only one memory and processor are shown in FIG. 18. In an actual end device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device, etc. The memory may be provided independently of the processor, or may be integrated with the processor, which is not limited in this embodiment.

In the embodiment of the present application, an antenna and a radio frequency circuit having a transceiving function may be regarded as a receiving unit and a transmitting unit (which may also be collectively referred to as a transceiving unit) of a terminal device, and a processor having a processing function may be regarded as a processing unit of the terminal device. As shown in fig. 18, the terminal device includes a receiving unit 31, a processing unit 32, and a transmitting unit 33. The receiving unit 31 may also be referred to as a receiver, a receiving circuit, etc., and the transmitting unit 33 may also be referred to as a transmitter, a transmitting circuit, etc. A processing unit may also be referred to as a processor, a processing board, a processing module, a processing device, or the like.

For example, in one embodiment, the receiving unit 31 is configured to perform the function of the first terminal in step 101 in the embodiment shown in fig. 4; and the transmitting unit 33 is configured to perform the function of the first terminal in step S102 in the embodiment shown in fig. 4.

In another embodiment, the receiving unit 31 is configured to execute the function of the first terminal in step S202 in the embodiment shown in fig. 6; and the transmitting unit 33 is configured to perform the functions of the first terminal in steps S201 and S203 in the embodiment shown in fig. 6.

In a further embodiment, the receiving unit 31 is configured to perform the functions of the first terminal in steps S301 and S303 in the embodiment shown in fig. 9; and the transmitting unit 33 is configured to perform the functions of the first terminal in steps S302 and S304 in the embodiment shown in fig. 9.

In a further embodiment, the receiving unit 31 is configured to perform the functions of the first terminal in steps S401 and S403 in the embodiment shown in fig. 10; the processing unit 32 is configured to execute step S404 in the embodiment shown in fig. 10; and the transmitting unit 33 is configured to perform the functions of the first terminal in steps S402 and S405 in the embodiment shown in fig. 10.

In a further embodiment, the receiving unit 31 is configured to perform the function of the first terminal in step S501 in the embodiment shown in fig. 12; the processing unit 32 is configured to execute steps S502 and S503 in the embodiment shown in fig. 12; and the transmitting unit 33 is configured to execute the function of the first terminal in step S504 in the embodiment shown in fig. 12.

In yet another embodiment, the receiving unit 31 is configured to execute the function of the first terminal in step S601 in the embodiment shown in fig. 13; the processing unit 32 is configured to execute step S602 in the embodiment shown in fig. 13; and the transmitting unit 33 is configured to execute the function of the first terminal in step S603 in the embodiment shown in fig. 13.

In yet another embodiment, the receiving unit 31 is configured to execute the function of the first terminal in step S701 in the embodiment shown in fig. 14; the processing unit 32 is configured to execute step S702 in the embodiment shown in fig. 14; and the transmitting unit 33 is configured to execute the function of the first terminal in step S703 in the embodiment shown in fig. 14.

Fig. 19 shows a simplified schematic diagram of a network-side device. The network side device includes a radio frequency signal transceiving and converting portion and a portion 42, and the radio frequency signal transceiving and converting portion includes a receiving unit 41 portion and a transmitting unit 43 portion (which may also be collectively referred to as a transceiving unit). The radio frequency signal receiving, transmitting and converting part is mainly used for receiving and transmitting radio frequency signals and converting the radio frequency signals and baseband signals; the 42 part is mainly used for baseband processing, control of network side equipment and the like. The receiving unit 41 may also be referred to as a receiver, a receiving circuit, etc., and the transmitting unit 43 may also be referred to as a transmitter, a transmitting circuit, etc. Part 42 is typically a control center of the network side device, and may be generally referred to as a processing unit, and is used for controlling the network side device to execute the steps executed by the network side device in fig. 4, 6, 9, 10, 12 to 14. Reference is made in particular to the description of the relevant part above.

Section 42 may include one or more boards, each board may include one or more processors and one or more memories, the processors being configured to read and execute programs in the memories to implement baseband processing functions and control of the network side devices. If a plurality of single boards exist, the single boards can be interconnected to increase the processing capacity. As an optional implementation, multiple boards may share one or more processors, multiple boards may share one or more memories, or multiple boards may share one or more processors at the same time.

For example, in one embodiment, the sending unit 43 is configured to execute the function of the network-side device in step S101 in the embodiment shown in fig. 4.

In another embodiment, the receiving unit 41 is configured to execute the function of the network-side device in step S201 in the embodiment shown in fig. 6; and the sending unit 43 is configured to execute the function of the network side device in step S202 in the embodiment shown in fig. 6.

In another embodiment, the receiving unit 41 is configured to execute the function of the network-side device in step S302 in the embodiment shown in fig. 9; and the sending unit 43 is configured to execute the function of the network-side device in step S303 in the embodiment shown in fig. 9.

In another embodiment, the sending unit 43 is configured to execute the function of the network-side device in step S401 in the embodiment shown in fig. 10.

In another embodiment, the sending unit 43 is configured to execute the function of the network-side device in step S601 in the embodiment shown in fig. 13.

In another embodiment, the sending unit 43 is configured to execute the function of the network-side device in step S701 in the embodiment shown in fig. 14.

Embodiments of the present application also provide a computer-readable storage medium, which stores instructions that, when executed on a computer, cause the computer to perform the above method.

Embodiments of the present application also provide a computer program product containing instructions which, when run on a computer, cause the computer to perform the above method.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the division of the unit is only one logical function division, and other division may be implemented in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. The shown or discussed mutual coupling, direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some interfaces, and may be in an electrical, mechanical or other form.

Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions according to the embodiments of the present application are wholly or partially generated when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on or transmitted over a computer-readable storage medium. The computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)), or wirelessly (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that includes one or more of the available media. The usable medium may be a read-only memory (ROM), or a Random Access Memory (RAM), or a magnetic medium, such as a floppy disk, a hard disk, a magnetic tape, a magnetic disk, or an optical medium, such as a Digital Versatile Disk (DVD), or a semiconductor medium, such as a Solid State Disk (SSD).

Claims

1. A method of communication, the method comprising:

a first terminal acquires first information, wherein the first information comprises one or more of a first part of bandwidth, a first subcarrier interval, a first transmission opportunity and a first retransmission mode;

and the first terminal performs data transmission on a side link based on the first information, wherein the side link is a wireless communication link between the first terminal and a second terminal.

2. The method of claim 1, wherein the first terminal obtaining the first information comprises:

the first terminal receives the first information from network side equipment; alternatively, the first and second electrodes may be,

the first terminal receives the first information from the second terminal.

3. The method of claim 1, further comprising:

the first terminal acquires second information of the second terminal, wherein the second information comprises one or more of a second part of bandwidth used by the second terminal, a second subcarrier interval, a second transmission opportunity and a second retransmission mode;

the first terminal acquires first information, including: and the first terminal determines the first information according to the second information.

4. The method of claim 3, wherein the obtaining, by the first terminal, the second information of the second terminal comprises:

the first terminal receives the second information from the network side equipment; alternatively, the first and second electrodes may be,

the first terminal receives the second information from the second terminal.

5. The method according to any one of claims 1 to 4, further comprising:

the first terminal sends third information to the network side equipment; or

The first terminal sends third information to the second terminal;

6. The method according to any of claims 2 to 5, wherein the first terminal is located in a first cell and the second terminal is located in a second cell, the method further comprising:

the first terminal receiving a first message, the first message including a common configuration of the first cell and the second cell;

the first terminal establishes a connection with the second terminal using the common configuration.

7. The method according to claim 3 or 4, wherein the obtaining, by the first terminal, the second information of the second terminal comprises:

the first terminal receives fifth information sent by the second terminal, where the fifth information is information of a broadcast service monitored by the second terminal in a predetermined second period, and the information of the broadcast service includes: one or more of partial bandwidth, subcarrier interval, transmission opportunity and retransmission mode used by the broadcast service;

and the first terminal determines the second information according to the fifth information.

8. The method according to any one of claims 1 to 7, further comprising:

the first terminal acquires sixth information, wherein the sixth information comprises the first information used for broadcasting or a mapping relation between a broadcast service identifier and the first information;

the first terminal determines first information, including:

and the first terminal determines the first information according to the sixth information.

9. The method according to any one of claims 1 to 8, further comprising:

the first terminal acquires a pre-configuration list, wherein the pre-configuration list comprises one or more configurations, and the configurations comprise one or more parameters of partial bandwidth, subcarrier interval, transmission opportunity and retransmission mode;

the first terminal determines first information, including:

and the first terminal determines a configuration in the pre-configuration list according to one or more of the broadcast service identification, the sending time and the broadcast service quantity, and determines the first information according to the determined configuration.

10. The method according to any of claims 1 to 9, wherein the transmission occasions are used to indicate one or more of the following occasions: the timing of the first terminal sending data to the network, the timing of the first terminal sending data on the side link, the timing of the first terminal receiving data sent by the network, the timing of the first terminal receiving data on the side link, or a flexible timing.

11. The method of claim 10, wherein the interval between the opportunity for the first terminal to transmit data to the network and the opportunity for the first terminal to transmit data on the side link is t, and wherein t is not equal to 0.

12. The method according to any one of claims 1 to 11, wherein the first terminal is a transmitting device, the second terminal is a receiving device, the retransmission mode includes a feedback-based retransmission and a non-feedback-based retransmission, and the feedback-based retransmission means that the transmitting device needs to determine whether to perform data retransmission based on feedback of the receiving device; the non-feedback-based retransmission means that the transmitting device does not need to determine whether to perform data retransmission based on the feedback of the receiving device.

13. A method of communication, the method comprising:

the network side equipment generates first information, wherein the first information comprises one or more of a first partial bandwidth used by the first terminal, a first subcarrier interval, a first transmission opportunity and a first retransmission mode

And the network side equipment sends the first information to a first terminal.

14. The method of claim 13, further comprising:

the network side device receives second information of a second terminal, wherein the second information includes one or more of a second partial bandwidth used by the second terminal, a second subcarrier interval, a second transmission opportunity, and a second retransmission mode.

15. The method according to claim 13 or 14, characterized in that the method further comprises:

the network side device receives third information from the first terminal, where the third information includes one or more of a third partial bandwidth used by the first terminal, a third subcarrier interval, a third transmission opportunity, and a third retransmission mode.

16. The method according to any of claims 13-15, wherein the first terminal is located in a first cell and the second terminal is located in a second cell, the method further comprising:

the network side equipment sends a first message to the first terminal, wherein the first message comprises the common configuration of the first cell and the second cell.

17. The method of any one of claims 13 to 16, further comprising:

and the network side equipment sends sixth information to the first terminal, wherein the sixth information comprises the first information used for broadcasting or a mapping relation between a broadcast service identifier and the first information.

18. A communications apparatus, the apparatus comprising:

a processing unit, configured to obtain first information, where the first information includes one or more of a first partial bandwidth, a first subcarrier interval, a first transmission opportunity, and a first retransmission mode;

and the transceiving unit is used for transmitting data on a side link by using the first information, wherein the side link is a wireless communication link between the first terminal and the second terminal.

19. The apparatus according to claim 18, wherein the transceiver unit is further configured to receive the first information from a network-side device; alternatively, the first and second electrodes may be,

the transceiver unit is further configured to receive the first information from the second terminal.

20. The apparatus of claim 18, wherein:

the processing unit is further configured to acquire second information of the second terminal, where the second information includes one or more of a second partial bandwidth used by the second terminal, a second subcarrier interval, a second transmission opportunity, and a second retransmission mode;

the processing unit is further configured to determine the first information according to the second information.

21. The apparatus of claim 20, wherein:

the transceiver unit is further configured to receive the second information from a network-side device; alternatively, the first and second electrodes may be,

the transceiver unit is further configured to receive the second information from the second terminal.

22. The apparatus of any one of claims 18 to 21, wherein:

the transceiver unit is further configured to send third information to the network side device; or

The transceiver unit is further configured to send third information to the second terminal;

23. The apparatus according to any of claims 19-22, wherein the first terminal is located in a first cell and the second terminal is located in a second cell;

the transceiver component is further configured to receive a first message, where the first message includes a common configuration of the first cell and the second cell;

the transceiver unit is further configured to establish a connection with the second terminal using the common configuration.

24. The apparatus of claim 20 or 21, wherein:

the transceiver unit is further configured to receive fifth information sent by the second terminal, where the fifth information is information of a broadcast service monitored by the second terminal in a predetermined second period, and the information of the broadcast service includes: one or more of partial bandwidth, subcarrier interval, transmission opportunity and retransmission mode used by the broadcast service;

the processing unit is further configured to determine the second information according to the fifth information.

25. The apparatus of any one of claims 18 to 24, wherein:

the processing unit is further configured to acquire sixth information, where the sixth information includes the first information used for broadcasting or a mapping relationship between a broadcast service identifier and the first information;

the processing unit is further configured to determine the first information according to the sixth information.

26. The apparatus of any one of claims 18 to 25, wherein:

the processing unit is further configured to obtain a preconfigured list, where the preconfigured list includes one or more configurations, and the configurations include one or more parameters of partial bandwidth, subcarrier spacing, transmission opportunity, and retransmission mode;

the processing unit is further configured to determine a configuration in the preconfigured list according to one or more of a broadcast service identifier, a transmission time, and a broadcast service number, and determine the first information according to the determined configuration.

27. The apparatus according to any of claims 18 to 26, wherein the transmission occasions are used to indicate one or more of the following occasions: the timing of the first terminal sending data to the network, the timing of the first terminal sending data on the side link, the timing of the first terminal receiving data sent by the network, the timing of the first terminal receiving data on the side link, or a flexible timing.

28. The apparatus of claim 27, wherein the interval between the timing for the first terminal to transmit data to the network and the timing for the first terminal to transmit data on the side link is t, and wherein t is not equal to 0.

29. The apparatus according to any one of claims 18 to 28, wherein the first terminal is a transmitting device, the second terminal is a receiving device, the retransmission mode includes a feedback-based retransmission and a non-feedback-based retransmission, and the feedback-based retransmission means that the transmitting device needs to determine whether to perform data retransmission based on feedback of the receiving device; the non-feedback-based retransmission means that the transmitting device does not need to determine whether to perform data retransmission based on the feedback of the receiving device.

30. A communications apparatus, the apparatus comprising:

a processing unit, configured to generate first information, where the first information includes one or more of a first fractional bandwidth used by the first terminal, a first subcarrier interval, a first transmission opportunity, and a first retransmission mode

And the transceiving unit is used for sending the first information to the first terminal.

31. The apparatus of claim 30, wherein:

the transceiver unit is further configured to receive second information of a second terminal, where the second information includes one or more of a second partial bandwidth used by the second terminal, a second subcarrier interval, a second transmission opportunity, and a second retransmission mode.

32. The apparatus of claim 30 or 31, wherein:

the transceiver unit is further configured to receive third information from the first terminal, where the third information includes one or more of a third fractional bandwidth used by the first terminal, a third subcarrier spacing, a third transmission opportunity, and a third retransmission mode.

33. The apparatus according to any of claims 30-32, wherein the first terminal is located in a first cell and the second terminal is located in a second cell;

the transceiver unit is further configured to send a first message to the first terminal, where the first message includes a common configuration of the first cell and the second cell.

34. The apparatus of any one of claims 30 to 33, wherein:

the transceiving unit is further configured to send sixth information to the first terminal, where the sixth information includes the first information used for broadcasting or a mapping relationship between a broadcast service identifier and the first information.