WO2023104010A1

WO2023104010A1 - Communication method and apparatus

Info

Publication number: WO2023104010A1
Application number: PCT/CN2022/136798
Authority: WO
Inventors: 张海森; 王燕; 李秉肇
Original assignee: 华为技术有限公司
Priority date: 2021-12-08
Filing date: 2022-12-06
Publication date: 2023-06-15
Also published as: CN116261102A

Abstract

Provided in the present application are a communication method and apparatus, which are used for improving the transmission efficiency of multicast data. The method comprises: acquiring first multicast data of a first service; determining that the first multicast data cannot be synchronously transmitted with first multicast data of other cells; and on resources except those used for synchronously transmitting the multicast data of the first service with other cells, sending the first multicast data to a terminal device. By means of the method, multicast data which has been received but cannot be synchronously transmitted with that of other cells can be sent to a terminal device without affecting the synchronous transmission of multicast data between cells.

Description

A communication method and device

Cross References to Related Applications

This application claims the priority of a Chinese patent application with application number 202111490093.7 and application title "A Communication Method and Device" filed with the China Patent Office on December 08, 2021, the entire contents of which are incorporated herein by reference.

technical field

The present application relates to the technical field of communication, and in particular to a communication method and device.

Background technique

Multicast and broadcast service (MBS) is a service for multiple terminal devices, such as live broadcast service, public safety service, batch software update service, etc. In order to support MBS data transmission, the long term evolution LTE (long term evolution, LTE) system supports a single frequency network (single frequency network, SFN) mechanism. In the SFN mechanism, two or more cells of the same base station or different base stations work on the same frequency, and use the same time-frequency resource to send the same MBS data. Therefore, the terminal equipment can receive the synchronized MBS data sent by two or more cells, which enhances the reliability of the MBS data.

In the SFN mechanism, in order not to interfere with the synchronous transmission of MBS data, the base station may give up the transmission of some received MBS data. For example, the base station 1 does not receive the data packet 3, resulting in incomplete data on the wireless transmission block 2 corresponding to the data packet 3, and the wireless transmission block 2 is different from the content of the wireless transmission block 2 to be sent by the cells of other base stations, which will The synchronous transmission of the wireless transmission block 2 in the cells of other base stations will cause interference. Therefore, the base station 1 will give up sending the wireless transmission block 2, and the wireless transmission block 2 may include other data packets successfully received by the base station in addition to the data packet 3. packets, therefore, these packets are also dropped from sending. For another example, if the base station does not finish sending the received data packets within the specified time, the data packets not sent to the terminal equipment will be abandoned after the specified time.

According to the above mechanism, although some multicast data are successfully transmitted to the base station, they cannot be sent to the terminal equipment, resulting in the discarding of the multicast data, thereby affecting the low transmission efficiency of the multicast data.

Contents of the invention

The present application provides a communication method and device for improving the transmission efficiency of multicast data.

In the first aspect, the present application provides a communication method, and the execution body of the method may be a network device, or a chip system or circuit, or a device or module in the network device, wherein the network device may be an access network device, It may also be a distributed unit (distributed unit, DU) and/or a central unit (centrialized unit, CU) in the access network device. The method includes: obtaining the first multicast data of the first service; determining that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells, and then sending the first multicast data to the terminal device on the first resource, The first resource is a resource other than the second resource, and the second resource is used to transmit multicast data of the first service synchronously with other cells.

In the embodiment of the present application, the multicast data of the service that cannot be transmitted synchronously with other cells is transmitted on resources other than the resource for synchronously transmitting the multicast data of the first service between cells, so that the first service can be transmitted synchronously without affecting other cells. In the case of multicast data of the service, the multicast data that has been received by the first service but cannot be transmitted synchronously with other cells is sent to the terminal device, so as to make up for the current defect of synchronous transmission of multicast data and improve the performance of the first service. The transmission efficiency of the multicast data can also improve the data integrity of the first service, thereby improving the service experience of the first service.

In a possible design, the identifier used for scrambling the first scheduling information is the same as the identifier used for scrambling the second scheduling information, where the first scheduling information is used to indicate that the multicast data of the first service is transmitted on the first resource , the second scheduling information is used to indicate to transmit the multicast data of the first service synchronously with other cells on the second resource.

In the above method, by using the same identifier to scramble the first scheduling information and the second scheduling information, the terminal device can determine that the multicast data transmitted on the first resource and the multicast data transmitted on the second resource belong to the same service , which is beneficial to improving the data integrity of the first service.

In a possible design, the method further includes: sending first information to the terminal device, where the first information is used to indicate the first resource. Through the above design, the terminal device can receive multicast data from resources other than the second resource.

In a possible design, the first information indicates a first search space, and the first search space is used by the terminal device to detect scheduling information of resources for transmitting multicast data of the first service.

In a possible design, the first information may specifically indicate the duration of the first search space, and the duration of the first search space is greater than the duration of the search space corresponding to the second scheduling information.

In the above example, by increasing the time-domain resources of the first search space, the first search space may include not only the search space corresponding to the second scheduling information, but also the search space corresponding to the first scheduling information, so that the terminal device can indicate Detect the first scheduling information in the first search space of the first resource, so that the multicast data can be received on the first resource, and then the existing multicast data of the first service can be transmitted without affecting the synchronous transmission of multicast data of the first service by other cells. The received multicast data that cannot be transmitted synchronously with other cells is sent to the terminal device, so as to improve the transmission efficiency of the multicast data of the first service, improve the data integrity of the first service, and improve the service experience of the first service.

In a possible design, the first information may indicate the third search space. Wherein, the third search space is used for the terminal device to detect the first scheduling information.

In the above design, by indicating the third search space, the terminal device can detect the first scheduling information in the third search space, so that it can receive multicast data on the first resource, and then can transmit the first service synchronously without affecting other cells In the case of the multicast data of the first service, the multicast data that has been received but cannot be transmitted synchronously with other cells is sent to the terminal device, so as to improve the transmission efficiency of the multicast data of the first service and improve the first service data integrity, and improve the service experience of the first business.

In a possible design, the first information is downlink control information (downlink control information, DCI) carried in the second resource, and the first information indicates the first resource. This design enables the DCI carried by the second resource to indicate resources other than the second resource, so that the terminal device can receive multicast data on resources other than the second resource, so that the multicast data of the first service can be transmitted synchronously without affecting other cells. In the case of multicast data, send the multicast data of the first service that has been received but cannot be transmitted synchronously with other cells to the terminal device, so as to improve the transmission efficiency of the multicast data of the first service and improve the data transmission efficiency of the first service. Integrity, and improve the business experience of the first business.

In a possible design, determining that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells includes: determining that the second multicast data is lost, wherein the first multicast data and the second multicast data Corresponds to the same radio transport block.

Since the second multicast data and the first multicast data correspond to the same wireless transmission block, if the second multicast data is lost, the data in the wireless transmission block is incomplete, and the wireless transmission block cannot be compared with the wireless transmission block of other cells. Synchronous transmission is performed, so that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells. In the above implementation, by sending the first multicast data to the terminal device on a resource other than the second resource, the first multicast data can be transmitted to the terminal device without affecting the synchronous transmission of other cells, so that Improving the transmission efficiency of the multicast data of the first service can also improve the data integrity of the first service, thereby improving the service experience of the first service.

In a possible design, determining that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells includes: receiving second time information after receiving the first time information, where the first time information indicates that the first time information The sending time of the first multicast data, the second time information indicates the sending time of the third multicast data, the first multicast data and the third multicast data belong to the same multicast service; the first multicast data is determined according to the second time information The data cannot be transmitted synchronously with the first multicast data of other cells.

Through the above method, without affecting the synchronous transmission of the multicast data associated with the second time information, the first multicast data that is too late to be sent in the multicast data associated with the first time information can be transmitted to the terminal device, so that Improve the performance of synchronous transmission.

In a possible design, determining that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells includes: determining that the acquisition time of the first multicast data is later than the first time or the second time, the first The time is the time when the first multicast data is sent to the terminal device, the second time is before the first time, and the second time is separated from the first time by a predetermined duration.

Through the foregoing method, the late received first multicast data can be transmitted to the terminal device without affecting the synchronous transmission of multicast data in other cells, so that the performance of synchronous transmission can be improved.

In a possible design, determining that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells includes: according to the information carried in the packet header of the first multicast data, it is impossible to determine the multicast data before the first multicast data The transmission of the broadcast data results in that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells.

In the above implementation manner, by sending the multicast data that cannot be transmitted synchronously with other cells on resources other than the second resource, the first multicast data can be sent without affecting the synchronous transmission of multicast data by other cells For terminal equipment, the transmission efficiency of the multicast data of the first service is improved, the data integrity of the first service is improved, and the service experience of the first service is improved.

In the second aspect, the present application provides a communication method. The execution body of the method may be a network device, or a chip or a circuit, or a device or module in the network device. The network device may be an access network device, or a It can be DU and/or CU in the access network equipment. The method includes: acquiring the first multicast data of the first service; sending scheduling information, the scheduling information is used to indicate the resources for sending the first multicast data, wherein, if the first multicast data cannot be combined with the first multicast data of other cells For synchronous transmission, the scheduling information is scrambled using the first identifier. If the first multicast data can be transmitted synchronously with the first multicast data of other cells, the scheduling information is scrambled using the second identifier; the resources indicated in the scheduling information Send the first multicast data on.

In this embodiment of the application, different identifiers are used to distinguish between multicast data that can be synchronized with other cells and multicast data that cannot be synchronized with other cells, so that network devices can avoid affecting the synchronous transmission of multicast data in other cells In this case, the multicast data that has been received but cannot be synchronized with other cells is sent to the terminal equipment, so as to make up for the current defect of synchronous transmission of multicast data, improve the transmission efficiency of multicast data of the first service, and also The data integrity of the first service is improved, thereby improving the service experience of the first service. Moreover, in the embodiment of the present application, the resource for sending multicast data that cannot be transmitted synchronously with other cells is still the resource that should transmit the multicast data synchronously. Broadcasting data can improve resource utilization and reduce the complexity of resource configuration.

In a possible design, the first identification is at the cell level, or, the first identification is at the access network device level. The above design distinguishes the multicast data that cannot be transmitted synchronously with other cells through cell-level or access network device-level identifiers, so as to avoid affecting the synchronous transmission of multicast data in other cells.

In a possible design, the second identifier is an identifier used for semi-persistent scheduling.

In a possible design, the method further includes: if the second multicast data is lost, determining that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells; wherein, the first multicast data and the second multicast data Multicast data corresponds to the same radio transmission block.

Since the second multicast data and the first multicast data correspond to the same wireless transmission block, if the second multicast data is lost, the data in the wireless transmission block is incomplete, and the wireless transmission block cannot be compared with the wireless transmission block of other cells. Synchronous transmission is performed, so that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells. However, in the above implementation manner, by sending the first multicast data to the terminal device on a resource other than the second resource used for synchronously transmitting multicast data with other cells, the second multicast data can be transmitted without affecting the synchronous transmission of other cells. The multicast data is transmitted to the terminal device, so that the transmission efficiency of the multicast data of the first service can be improved, and the data integrity of the first service can be improved, thereby improving the service experience of the first service.

In a possible design, the method further includes: if the acquisition time of the first multicast data is later than the first time or the second time, determining that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells ; Wherein, the first time is the time when the first multicast data is sent to the terminal device, the second time is before the first time, and the second time is separated from the first time by a predetermined duration.

Through the above method, the late received first multicast data can be transmitted to the terminal device without affecting the synchronous transmission of multicast data in other cells, so that the transmission efficiency of the multicast data of the first service can be improved, and the The data integrity of the first service can further improve the service experience of the first service.

In the above implementation manner, by sending the multicast data whose transmission time cannot be determined on resources other than the second resource used to transmit multicast data synchronously with other cells, it is possible to transmit multicast data synchronously without affecting other cells Next, the first multicast data is sent to the terminal device, so as to improve the transmission efficiency of the multicast data of the first service, improve the data integrity of the first service, and improve the service experience of the first service.

In a third aspect, the present application provides a communication method, and the execution body of the method may be a terminal device, or may be a chip or a circuit, or a device or module in the terminal device. The method includes: using the first identifier and the second identifier to descramble the scheduling information, the first identifier is used to descramble the scheduling information of resources that cannot transmit multicast data synchronously with other cells, and the second identifier is used to descramble the resource that can transmit multicast data with other cells Descrambling the scheduling information of resources for synchronously transmitting the multicast data; receiving the multicast data according to the scheduling information.

In this embodiment of the application, different identifiers are used to distinguish between multicast data that can be synchronized with other cells and multicast data that cannot be synchronized with other cells, so that network devices can reduce the number of multicast data that cannot be synchronized with other cells. In the case of the impact on the synchronous transmission mechanism of multicast data, the multicast data that has been received but cannot be synchronized with other cells is sent to the terminal device, so as to make up for the current defect of synchronous transmission of multicast data and improve the first service The transmission efficiency of the multicast data can also improve the data integrity of the first service, thereby improving the service experience of the first service. Moreover, in the embodiment of the present application, the resource for sending multicast data that cannot be transmitted synchronously with other cells is still the resource that should transmit the multicast data synchronously. Broadcasting data can improve resource utilization and reduce the complexity of resource configuration.

In a fourth aspect, the present application provides a communication method. The execution subject of the method may be a network device, or a chip or a circuit, or a device or module in the network device, wherein the network device may be an access network device, or a It can be DU and/or CU in the access network equipment. The method includes: sending first configuration information to the terminal device, the first configuration information includes configuration information carried by a first radio link control (radio link control, RLC) and configuration information carried by a second RLC, and the first RLC bearer is used for point-to-point Transmission, the second RLC bearer is used for point-to-multipoint transmission; obtain the first multicast data; determine that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells; send the first multicast data through the first RLC bearer broadcast data.

In the embodiment of the present application, the multicast data that cannot be transmitted synchronously with other cells is sent to the terminal device through point-to-point transmission, so that the multicast data that has been received but cannot be transmitted synchronously with other cells can be received without affecting the synchronous transmission of multicast data The synchronous multicast data of other cells is sent to the terminal equipment, which can make up for the defects of the current multicast data synchronous transmission, improve the transmission efficiency of the multicast data of the first service, and can also improve the data integrity of the first service, and then can Improve the service experience of the first service.

In a possible design, the first configuration information further includes an identifier of the first multicast radio bearer and an identifier of the second multicast radio bearer, where the RLC bearer corresponding to the first multicast radio bearer includes the first RLC bearer, and the second The RLC bearer corresponding to the two multicast radio bearers includes the second RLC bearer.

In a possible design, the first configuration information further includes an identifier of the first multicast radio bearer, where the RLC bearer corresponding to the first multicast radio bearer includes the first RLC bearer.

In a possible design, the first configuration information further includes an identifier of the third multicast radio bearer, where the RCL bearer corresponding to the third multicast radio bearer includes the first RLC bearer and the second RLC bearer.

In a possible design, the first configuration information further includes an identifier of the fourth multicast radio bearer and an identifier of the first data radio bearer, where the RLC bearer corresponding to the fourth multicast radio bearer includes the second RLC bearer, and the first The RLC bearer corresponding to the data radio bearer includes the first RLC bearer.

In a possible design, the first configuration information further includes an identifier of the first data radio bearer, where the RLC bearer corresponding to the first data radio bearer includes the first RLC bearer.

Through the above method, without affecting the synchronous transmission of the multicast data associated with the second time information, the first multicast data that is too late to be sent in the multicast data associated with the first time information can be transmitted to the terminal device, so that Improving the transmission efficiency of the multicast data of the first service can also improve the data integrity of the first service, thereby improving the service experience of the first service.

In the above implementation, by sending the multicast data whose sending time cannot be determined on resources other than the second resource, the first multicast data can be sent to the terminal without affecting other cells to transmit multicast data synchronously The device is used to improve the transmission efficiency of the multicast data of the first service, improve the data integrity of the first service, and improve the service experience of the first service.

In a fifth aspect, the present application provides a communication method, and the execution body of the method may be a terminal device, or may be a chip or a circuit, or a device or module in the terminal device. The method includes: receiving first configuration information, the first configuration information includes configuration information of a first RLC bearer and configuration information of a second RLC bearer, the first RLC bearer is used for point-to-point transmission, and the second RLC bearer is used for point-to-multipoint transmission ; Receive multicast data through the first RLC bearer and the second RLC bearer.

In a possible design, the first configuration information further includes an identifier of the first multicast radio bearer and an identifier of the second multicast radio bearer, where the RLC entity corresponding to the first multicast radio bearer includes the first RLC bearer, and the second The RLC bearer corresponding to the two multicast radio bearers includes the second RLC bearer.

In the sixth aspect, the embodiment of the present application provides a communication device that can implement the method implemented by the network device in the first aspect, the second aspect, or the fourth aspect or any possible design thereof. The apparatus comprises corresponding units or components for performing the method described above. The units included in the device may be implemented by software and/or hardware. The apparatus may be, for example, a network device, or a component or a baseband chip, a chip system, or a processor that can support the implementation of the above method in the network device.

Exemplarily, the communication device may include modular components such as a transceiver unit (or communication module, transceiver module) and a processing unit (or processing module), and these modules may perform the above-mentioned first aspect or the second aspect or the fourth aspect. Aspect or any possible design of the network equipment, or chip system or circuit, or the corresponding functions of devices or modules in the network equipment. When the communication device is a network device, the transceiver unit may be a transmitter and a receiver, or a transceiver obtained by integrating the transmitter and receiver. The transceiver unit may include an antenna and a radio frequency circuit, etc., and the processing unit may be a processor, such as a baseband chip. When the communication device is a component having the functions of the above-mentioned network equipment, the transceiver unit may be a radio frequency unit, and the processing unit may be a processor. When the communication device is a system-on-a-chip, the transceiver unit may be an input-output interface of the system-on-a-chip, and the processing unit may be a processor of the system-on-a-chip, such as a central processing unit (CPU).

The transceiver unit may be used to perform the receiving and/or sending action performed by the network device in the first aspect or the second aspect or the fourth aspect or any possible design thereof. The processing unit may be used to perform actions other than receiving and sending performed by the network device in the first aspect or the second aspect or the fourth aspect or any possible design thereof. For example, acquiring the first multicast data, determining that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells, and so on.

In a seventh aspect, the embodiment of the present application provides a communication device that can implement the method implemented by the terminal device in the third aspect or the fifth aspect or any possible design thereof. The apparatus comprises corresponding units or components for performing the method described above. The units included in the device may be implemented by software and/or hardware. The apparatus may be, for example, a terminal device, or a component or a baseband chip, a chip system, or a processor that can support the implementation of the above method in the terminal device.

Exemplarily, the communication device may include modular components such as a transceiver unit (or a communication module, a transceiver module) and a processing unit (or a processing module), and these modules may implement the third aspect or the fifth aspect or any of them Corresponding functionality of the terminal equipment in a possible design. When the communication device is a terminal device, the transceiver unit may be a transmitter and a receiver, or a transceiver obtained by integrating a transmitter and a receiver. The transceiver unit may include an antenna and a radio frequency circuit, etc., and the processing unit may be a processor, such as a baseband chip. When the communication device is a component having the functions of the above-mentioned terminal equipment, the transceiver unit may be a radio frequency unit, and the processing unit may be a processor. When the communication device is a system-on-a-chip, the transceiver unit may be an input-output interface of the system-on-a-chip, and the processing unit may be a processor of the system-on-a-chip, such as a CPU.

The transceiver unit may be used to perform the receiving and/or sending actions performed by the terminal device in the third aspect or the fifth aspect or any possible design thereof. The processing unit may be used to perform actions other than receiving and sending performed by the terminal device in the third aspect or the fifth aspect or any possible design thereof. For example, the scheduling information is detected by using the first identifier and the second identifier.

In an eighth aspect, a communication system is provided, and the communication system includes a communication device and a terminal device for performing the method shown in the first aspect or any possible design thereof.

According to a ninth aspect, there is provided a communication system, the communication system includes a communication device that executes the method shown in the second aspect or any possible design thereof, and executes the method shown in the third aspect or any possible design thereof method of communication means.

In a tenth aspect, a communication system is provided, the communication system includes a communication device performing the method shown in the fourth aspect or any possible design thereof, and executing the method shown in the fifth aspect or any possible design thereof method of communication means.

In an eleventh aspect, a computer-readable storage medium is provided, the computer-readable storage medium is used for storing computer instructions, and when the computer instructions are run on a computer, the computer is made to perform the above-mentioned first to fifth aspects or its Any one of the possible designs is shown in the method.

In a twelfth aspect, there is provided a computer program product containing instructions, the computer program product is used to store computer instructions, and when the computer instructions are run on a computer, the computer is made to perform the above first to fifth aspects or any of them. One possible design is shown in the approach.

In a thirteenth aspect, there is provided a circuit, the circuit is coupled with a memory, and the circuit is used to execute the method shown in the first aspect to the fifth aspect or any possible design thereof. The circuitry may include chip circuitry.

Description of drawings

FIG. 1 is a schematic diagram of a transmission of MBS data according to an embodiment of the present application;

FIG. 2A is a schematic diagram of a multicast radio bearer according to an embodiment of the present application;

FIG. 2B is a schematic diagram of another multicast radio bearer according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a wireless transmission block being muted according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a communication system according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a communication device according to an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

FIG. 7 is a schematic structural diagram of an access network device according to an embodiment of the present application;

FIG. 8 is a schematic flowchart of a communication method according to an embodiment of the present application;

FIG. 9 is a schematic diagram of a search space corresponding to second scheduling information according to an embodiment of the present application;

FIG. 10 is a schematic diagram of a first search space according to an embodiment of the present application;

FIG. 11 is a schematic flowchart of a communication method according to an embodiment of the present application;

FIG. 12 is a schematic diagram of scheduling resource scrambling according to an embodiment of the present application;

FIG. 13 is a schematic flowchart of a communication method according to an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solution and advantages of the application clearer, the application will be further described in detail below in conjunction with the accompanying drawings. The specific operation methods in the method embodiments can also be applied to the device embodiments or system embodiments.

In the following, some terms used in the embodiments of the present application are explained, so as to facilitate the understanding of those skilled in the art.

1) MBS: MBS is a service transmitted to multiple terminal devices at the same time, such as live broadcast service, public safety service, batch software update service, etc. MBS is an abbreviation for Multicast/Broadcast or Multicast/Broadcast Service. The MBS comes from the data server. First, the data server sends the MBS data to the core network device, then the core network device sends the MBS data to the access network device, and finally the access network device sends the MBS data to at least one terminal that receives the MBS. equipment. When the core network device sends MBS data to the access network device, the MBS data is transmitted through a common transmission channel, that is, the MBS session. When the access network device sends the data to the terminal device, there are two transmission methods: the first One can adopt point to multi-point (point to multi-point, PTM) transmission mode; the second can adopt point to point (point to point, PTP) transmission mode. As shown in Figure 1.

In this embodiment of the application, MBS can also be called "MBS service", "MBS broadcast service", "MBS session", "MBS broadcast service", "MBS multicast service", "MBS multicast service", "broadcast service", "broadcast service"" Multicast service", "multicast service", "multicast service", "multicast service", "MBS service" and so on.

It should be noted that MBS is only an exemplary naming of multicast services, and the naming of multicast services may be different under different communication standards. For example, in long term evolution (long term evolution, LTE), multicast services may be called Multimedia broadcast multicast service (multimedia broadcast multicast service, MBMS), multicast service in new air interface (new radio, NR) can be called MBS, in future communication development, multicast service can also be named other, this application does not To be specifically defined, it is collectively referred to as a multicast service hereinafter.

2) The single frequency network (single frequency network, SFN) mechanism refers to: in a certain area, multiple synchronous cells transmit the same data to the terminal equipment on the same time and frequency resources at the same time, and the same physical signal sent by multiple cells When the superposition is performed on the air interface, what the terminal equipment receives is a single superimposed data, which can improve the strength of the received signal and eliminate the interference between cells. This mechanism requires that the data sent by two or more cells are exactly the same, otherwise the sent signals cannot be correctly combined, wherein the two or more cells may belong to the same base station or belong to different base stations.

In the current MBSFN technology, that is, the SFN mechanism of MBS, N cells use the same time-frequency resource when sending MBS data, and the N cells send the same MBS data on the same time-frequency resource, that is, the N cells Each cell sends data packet 0 on resource 0 and data packet 1 on resource 1, N is an integer greater than 1, and the N cells belong to the same base station or belong to different base stations. In this way, the MBS data sent by multiple cells is as if one cell is sending MBS data. If a UE is at the edge of a certain cell coverage, the UE can receive signals from the current cell and neighboring cells. Since MBS data is sent on the same time-frequency resource, the UE can receive two or more signals. The superimposed MBS data signals transmitted by more than two cells enhance the transmission reliability of the MBS data.

In order to ensure that the same MBS data is sent on the same resource, the MBS data control device (or called the transmission control device) such as the core network device, the access network device, the CU of the access network device, or the application server of the MBS, etc. may The time stamp is carried in the MBS data, and the time stamp can indicate the time when the MBS data (or the group of MBS data) is sent, so as to ensure the synchronization of MBS data transmission among multiple cells.

3) Multicast radio bearer (MBS radio bearer, MRB): At present, when the base station performs multicast transmission, the data packets in the packet data convergence protocol (packet data convergence protocol, PDCP) entity are transmitted to the media access through an RLC entity The control (media access control, MAC) entity then sends the data packet through the physical layer, and multiple terminal devices receive the data packet. If the PTM transmission mode is adopted, the data packet is sent to the terminal device through a PTM path or a PTM branch or a PTM leg (leg) or an entity used for PTM transmission. If the PTP transmission mode is adopted, the data packet is sent to the terminal device through a PTP path or a PTP branch or a PTP leg (leg) or an entity used for PTP transmission. Wherein, a path, a branch, a leg, or an entity is a schematic description of a transmission path of a corresponding transmission mode, which is not limited in the present application.

In an implementation manner, the base station may configure a split MRB (split-MRB) for the terminal device, that is, the MRB configured by the base station for the terminal device may include at least two paths. For example, as shown in FIG. 2A , MRB1 may be configured for a terminal device. The MRB1 may include a PDCP entity, and the PDCP entity may connect the RLC1 entity and the RLC2 entity, the RLC1 entity may correspond to the PTP path, and the RLC2 entity may correspond to the PTM path.

In another implementation manner, the MRB configured by the base station for the terminal device may include one path, and the path may be a PTP path or a PTM path. For example, as shown in FIG. 2B , the base station may configure MRB2 for the terminal equipment. The MRB2 may include a PDCP entity, and the PDCP entity may be connected to an RLC entity, and the RLC entity may correspond to a PTP path or a PTM path.

It should be noted that FIG. 2A and FIG. 2B are only exemplary illustrations, and do not limit the protocol architecture of the terminal device.

In the embodiments of the present application, "at least one" means one or more, and "multiple" means two or more. "And/or" describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist at the same time, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the contextual objects are an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one item (piece) of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple .

And, unless otherwise stated, the ordinal numerals such as "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects, and are not used to limit the size, content, order, and timing of multiple objects , priority or importance, etc. For example, the first information and the second information are only for distinguishing different information, and do not represent the difference in size, content, priority or importance of the two pieces of information.

Some terms and concepts involved in the embodiments of the present application are introduced above, and the technical features involved in the embodiments of the present application are introduced below.

Currently, in the SFN mechanism, if the base station does not receive multicast data from the core network equipment (or the DU of the base station does not receive multicast data from the CU of the base station), the data in the wireless transmission block corresponding to the multicast data will not Complete, if the wireless transmission block is still transmitted through PTM on the SFN resource, it will be inconsistent with the multicast data content sent by the cells of other base stations (or other DUs of the base station) on this SFN resource, so that other base stations (or base station The synchronous transmission of the wireless transmission block by other DU) cells causes interference, and the SFN cannot be realized. Therefore, the wireless transmission block corresponding to the lost multicast data should be muted (muted), that is, not transmitted. In addition to the lost multicast data, the wireless transmission block may also include other multicast data. Since the wireless transmission block is muted, other multicast data included in the wireless transmission block cannot be sent. For example, taking the multicast data that the DU of the base station has not received from the CU of the base station as an example, as shown in FIG. PDCP PDU 2 should have been transmitted in wireless transmission block 1 with a segment of PDCP PDU 1 and PDCP PDU 3 encapsulated in wireless transmission block 1. Due to the loss of PDCP PDU 2, wireless transmission block 1 was muted, so that it should have been included in wireless transmission block 1 Other multicast data in the DU cannot be transmitted synchronously with these multicast data in cells of other DUs.

In addition, according to term introduction 2) above, the multicast data received by the base station carries a time tag, and the time tag can indicate the time when the base station sends the multicast data over the air interface. The multicast data associated with the time stamp should be sent before the sending time indicated by the next time stamp. If the multicast data associated with the time stamp has a large amount of data, it will not be sent before the sending time indicated by the next time stamp. , in order not to affect the synchronous transmission of multicast data with subsequent time tags, the unsent multicast data should be discarded, resulting in that although these unsent multicast data are successfully received by the base station, they cannot be compared with the multicast data of the cells of other base stations. Broadcast data is transmitted synchronously.

According to the above mechanism, although some multicast data is successfully transmitted to the base station, it cannot be sent to the terminal equipment, so these data packets are discarded, thereby affecting the transmission efficiency.

Based on this, embodiments of the present application provide a communication method and device for improving transmission efficiency of multicast data. Among them, the method and the device are based on the same technical conception. Since the principle of solving the problem of the method and the device is similar, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.

The communication method provided in this application can be applied to various communication systems, for example, it can be Internet of things (internet of things, IoT), narrowband Internet of things (narrow band internet of things, NB-IoT), long term evolution (long term evolution) , LTE), it can also be the fifth generation ( ^5th generation, 5G) communication system, it can also be a hybrid architecture of LTE and 5G, it can also be 6G or a new communication system emerging in the future communication development, etc. The 5G communication system described in this application may include at least one of a non-standalone (NSA) 5G communication system and a standalone (standalone, SA) 5G communication system. The communication system may also be machine-to-machine (machine to machine, M2M) communication, machine type communication (machine type communication, MTC), vehicle-to-vehicle communication, or vehicle-to-any node communication, or other communication systems.

As shown in FIG. 4 , the communication method provided by the embodiment of the present application can be applied to a communication system, and the communication system includes a terminal device, multiple access network devices, and may also include core network devices. FIG. 4 takes three access network devices, ie, access network device 1, access network device 2, and access network device 3, as an example. The multiple access network devices simultaneously transmit the same multicast data to the terminal device on the same time and frequency resources.

The embodiments of the present application can also be used in other communication systems, as long as the communication system needs to perform multicast data synchronous transmission of multiple cells/access network devices. FIG. 4 is only a schematic diagram, and does not specifically limit the type of the communication system and the quantity and type of devices included in the communication system.

The terminal equipment shown above may be user equipment (user equipment, UE), terminal (terminal), access terminal, terminal unit, terminal station, mobile station (mobile station, MS), remote station, remote terminal, mobile terminal (mobile terminal), wireless communication equipment, terminal agent, terminal equipment, cellular telephone, cordless telephone, session initiation protocol (session initiation protocol, SIP) telephone, wireless local loop (wireless local loop, WLL) station, personal digital processing (personal digital assistant, PDA) devices, handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in future 5G networks or terminal devices in future evolved PLMN networks wait. The terminal device may have a wireless transceiver function, which can communicate with one or more access network devices of one or more communication systems (such as wireless communication), and accept network services provided by the access network devices. Here, access The network equipment includes but not limited to the access network equipment shown in FIG. 4 .

In addition, terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; terminal equipment can also be deployed on water (such as ships, etc.); terminal equipment can also be deployed in the air (such as aircraft, balloons and satellites, etc.) . Specifically, the terminal device may be a mobile phone, a tablet computer (pad), a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal, an augmented reality (augmented reality, AR) terminal, an industrial control (industrial control ), wireless terminals in self driving, wireless terminals in remote medical, wireless terminals in smart grid, wireless terminals in transportation safety , wireless terminals in smart cities, wireless terminals in smart homes, etc. The terminal device may also be a communication chip with a communication module, or a vehicle with a communication function, or a vehicle-mounted device (such as a vehicle-mounted communication device, a vehicle-mounted communication chip), etc.

Access network equipment (or access network point refers to equipment that provides network access functions, such as wireless access network (radio access network, RAN) base station (or RAN equipment) and so on. Access network equipment can be specific Including a base station (base station, BS), or including a base station and a radio resource management device for controlling the base station, etc. The access network device may also include a relay station (relay device), an access point, and a base station in the future 5G network, The base station or NR base station in the future evolution of the PLMN network. The access network device can be a wearable device or a vehicle-mounted device. The access network device can also be a communication chip with a communication module.

For example, access network equipment includes but is not limited to: next-generation base station (g nodeB, gNB) in 5G, evolved node B (evolved node B, eNB) in long term evolution (long term evolution, LTE) system, wireless network A controller (radio network controller, RNC), a wireless controller under a cloud radio access network (cloud radio access network, CRAN) system, a base station controller (base station controller, BSC), a home base station (for example, home evolved nodeB, or home node B, HNB), baseband unit (baseBand unit, BBU), transmission point (transmitting and receiving point, TRP), transmission point (transmitting point, TP), mobile switching center, can also be the evolution type in LTE ( The evolutional) NB (eNB or eNodeB) can also be a base station device in a 5G network or an access network device in a future evolved PLMN network, or a wearable device or a vehicle-mounted device.

In some deployments, the access network equipment may include a centralized unit (CU) and a DU. The access network device may also include an active antenna unit (active antenna unit, AAU). The CU implements some functions of the access network equipment, and the DU implements some functions of the access network equipment. For example, the CU is responsible for processing non-real-time protocols and services, and realizing radio resource control (radio resource control, RRC) and PDCP layer functions. The DU is responsible for processing the physical layer protocols and real-time services, and realizes the functions of the RLC layer, the MAC layer, and the physical layer (PHY) layer. The AAU implements some physical layer processing functions, radio frequency processing and related functions of active antennas. Since the information of the RRC layer will eventually become the information of the PHY layer, or be transformed from the information of the PHY layer, under this architecture, high-level signaling, such as RRC layer signaling, can also be considered to be sent by the DU , or, sent by DU+AAU. It can be understood that the access network device may be a device including one or more of a CU node, a DU node, and an AAU node. In addition, the CU can be divided into access network devices in the access network (radio access network, RAN), and the CU can also be divided into access network devices in the core network (core network, CN) (which can be referred to as CN devices). ), which is not limited in this application.

In addition, the access network device can be connected to a core network (core network, CN) device, and the core network device can be used to provide core network services for terminal devices connected to the access network. Core network devices may correspond to different devices in different systems. For example, in 3G, the core network equipment can correspond to the serving GPRS support node (SGSN) of general packet radio service (GPRS) and/or the gateway GPRS Support Node (GGSN) of GPRS . In 4G, the core network equipment may correspond to a mobility management entity (mobility management entity, MME) and/or a serving gateway (serving gateway, S-GW), etc. In 5G, core network equipment can correspond to access and mobility management function (access and mobility management function, AMF) entity, session management function (session management function, SMF) entity or user plane function (user plane function, UPF) entity, etc. .

In the following, the possible structures of the access network device and the terminal device will be introduced with reference to the accompanying drawings.

Exemplarily, Fig. 5 shows a possible structural schematic diagram of the device. The apparatus shown in FIG. 5 may be a communication device, or a chip applied in a communication device or other combined devices, components (or components) having functions of the communication device shown in this application, etc., wherein the communication device may be a network device As shown in the embodiment of the present application, the first network device may also be a terminal device. The apparatus may include a processing module 510 and a transceiving module 520 . Wherein, the transceiver module 520 can be a functional module, and the functional module can complete both the sending operation and the receiving operation. For example, the transceiver module 520 can be used to perform all the sending operations and receiving operations performed by the communication device. During the sending operation, the transceiver module 520 can be considered as a sending module, and when the receiving operation is performed, the transceiver module 520 can be considered as a receiving module; perhaps, the transceiver module 520 can also be two functional modules, and the transceiver module 520 can be regarded as the two A general term for two functional modules, the two functional modules are the sending module and the receiving module, the sending module is used to complete the sending operation, for example, the sending module can be used to perform all the sending operations performed by the communication device, and the receiving module is used to complete the receiving Operation, the receiving module may be used to perform all receiving operations performed by the communication device.

Exemplarily, when the apparatus is a communication device, the transceiver module 520 may include a transceiver and/or a communication interface. Transceivers may include antennas and radio frequency circuits, among others. The communication interface is such as an optical fiber interface. The processing module 510 may be a processor, such as a baseband processor, and the baseband processor may include one or more central processing units (central processing unit, CPU).

When the device is a component having the function of the communication device shown in this application, the transceiver module 520 may be a radio frequency unit, and the processing module 510 may be a processor, such as a baseband processor.

When the device is a system-on-a-chip, the transceiver module 520 may be an input/output interface of a chip (such as a baseband chip), and the processing module 510 may be a processor of the system-on-a-chip, and may include one or more central processing units.

It should be understood that the processing module 510 in the embodiment of the present application may be implemented by a processor or a processor-related circuit component, and the transceiver module 520 may be implemented by a transceiver or a transceiver-related circuit component.

In an implementation manner, when the communication device is a network device, the processing module 510 may be configured to perform all operations performed by the first network device in the embodiment of the present application except the transceiving operation, such as processing operations, and/or Other processes used to support the technology described herein include determining that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells, scrambling scheduling information, and the like. The transceiver module 520 may be used to perform all receiving and sending operations performed by the first network device in the embodiment of the present application, and/or to support other processes of the technology described herein.

It can be understood that the transceiver module is also called a transceiver unit. When the apparatus shown in FIG. 5 is a terminal device, the transceiver module 520 may specifically be the transceiver 610 in FIG. 6 , and the processing module 510 may specifically be the processor 620 in FIG. 6 . When the apparatus shown in FIG. 5 is a network device, the transceiver module 520 may specifically be the transceiver 710 in FIG. 7 , and the processing module 510 may specifically be the processor 720 in FIG. 7 .

In another implementation manner, when the communication device is a terminal device, the processing module 510 may be used to perform all operations performed by the terminal device in the embodiment of the present application except the sending and receiving operations, such as processing operations, and/or use For other processes supporting the technology described herein, for example, the transceiver module 520 receives the first multicast data on the first resource, uses the first identifier and the second identifier to descramble the scheduling information, and the like. The transceiver module 520 may be used to perform all the receiving and sending operations performed by the terminal device in the embodiment of the present application, and/or to support other processes of the technologies described herein.

Fig. 6 shows another possible structural diagram of a terminal device. As shown in FIG. 6 , the terminal device includes a processor 620 and a transceiver 610 , and may also include one or more items of a memory and an input/output device. The processor 620 is mainly used to process communication protocols and communication data, control devices, execute software programs, process data of software programs, and the like. Memory is primarily used to store software programs and data. The transceiver 610 is used to complete functions related to data transceiving. Wherein, the transceiver 610 may include a radio frequency unit (or radio frequency circuit) and an antenna. The radio frequency unit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal. Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal equipment may not have input and output devices.

When the terminal device needs to send data, the processor 620 performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit of the transceiver 610, and the radio frequency circuit performs radio frequency processing on the baseband signal, and transmits the radio frequency signal to the sent outside. When data is sent to the terminal device, the radio frequency circuit of the transceiver 610 receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 620, and the processor 620 converts the baseband signal into data and Do something with that data. For ease of illustration, only one memory and processor are shown in FIG. 6 . In an actual terminal device product, there may be one or more processors and one or more memories. A memory may also be called a storage medium or a storage device. The memory may be set independently of the processor, or may be integrated with the processor, which is not limited in this embodiment of the present application.

Fig. 7 shows another possible structural diagram of a network device. As shown in FIG. 7 , the network device includes a processor 720 and a transceiver 710. Optionally, the transceiver 710 may also be called a transceiver, a transceiver circuit, and the like. A network device may also include one or more of a memory and an input/output device.

The processor 720 is mainly used to process communication protocols and communication data, perform baseband processing, control network devices, execute software programs, process data of software programs, and the like. Memory is primarily used to store software programs and data. The transceiver 710 is used to complete functions related to data sending and receiving. Wherein, the transceiver 710 may include at least one antenna 711 and a radio frequency unit 712 . The transceiver 710 is mainly used for transmitting and receiving radio frequency signals and converting radio frequency signals and baseband signals. The radio frequency unit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal. Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves.

The transceiver 710 and the processor 720 may be physically set together, or may be physically separated, that is, distributed access network equipment.

Exemplarily, the transceiver 710 may include one or more radio frequency units, such as a remote radio unit (remote radio unit, RRU), and the processor 720 may include one or more baseband units (baseband unit, BBU) (also called It is a digital unit, digital unit, DU).

In an example, the processor 720 may be composed of one or more single boards, and multiple single boards may jointly support a radio access network of a single access standard (such as an LTE network), or may separately support wireless access networks of different access standards. Radio access network (such as LTE network, 5G network or other networks). The processor 720 also includes a storage unit 721 and a processing unit 722 . The storage unit 721 is used to store necessary instructions and data. The processing unit 722 is used to control the network device to perform necessary actions, for example, to control the network device to execute the operation process of the first network device in the embodiment shown in this application. The storage unit 721 and the processing unit 722 may serve one or more single boards. That is to say, the storage unit and the processing unit can be separately set on each single board. It is also possible that multiple single boards share the same storage unit and processing unit. In addition, necessary circuits can also be set on each single board.

The network architecture and business scenarios described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute limitations on the technical solutions provided by the embodiments of the present application. For the evolution of architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. For ease of introduction, hereinafter, the method is performed by a network device and a terminal device as an example, wherein the network device may be an access network device, or may be a DU and/or CU in the access network device. The method can be applied to a multicast data synchronous transmission scenario such as an SFN scenario. In a multicast data synchronous transmission scenario, multiple network devices can cooperate to send data to a terminal device. In order to facilitate the understanding of the solution, the following describes the communication process between a network device participating in multicast transmission (hereinafter referred to as the first network device) and the terminal device in the multicast scenario. It should be understood that the connection with the first network device For a process of communication between other network devices and terminal devices that cooperate to perform synchronous multicast data transmission, refer to the process of communicating between the first network device and the terminal device.

It should be noted that this embodiment of the present application only uses multicast data as an example for illustration. It should be understood that the solutions provided by the embodiments of this application can also be applied to scenarios of synchronous transmission of unicast data or other data. In addition, in the methods involved in the embodiments of the present application, unless otherwise specified, the relevant actions of the network device, the actions of the access network device, the actions of the base station, and the actions of the cell have the same meaning. For example, in the following S801, the first network device obtains the first multicast data of the first service, which may also be expressed as the first access network device obtains the first multicast data of the first service, or as the first cell obtains the first multicast data of the first service. The first multicast data of a service, etc. No further details will be given below.

It should also be understood that the various embodiments of the present application may be implemented independently or in combination with each other.

Referring to FIG. 8 , it is a schematic flowchart of a communication method provided by the present application. The method includes:

S801. A first network device acquires first multicast data of a first service.

Optionally, the first network device may obtain the first multicast data by means of generation, or obtain the first multicast data by an upper layer node, of course, it may also obtain the first multicast data by other methods, which are not specifically limited here . Wherein, the first network device may be an access network device or a CU of the access network device, and the upper layer node may be a core network device, or a host node, a relay node, and the like. Alternatively, the first network device may be a DU in the access network device, and the upper layer node may be a CU in the access network device.

In an exemplary description, the first network device may also acquire first time information from the upper node, where the first time information may indicate the sending time of the first multicast data. Wherein, the time information may also be referred to as a time label, a time stamp, and the like.

Optionally, the first multicast data can be a data packet, for example, the first multicast data can be a PDCP PDU, or an RLC service data unit (service data unit, SDU), or a synchronization (synchronization, SYNC ) PDU, may also be a new air interface user plane (NR user, NR-U) PDU, and may also be a general packet radio service tunneling protocol user plane (GPRS tunnel protocol user, GTP-U) PDU. Wherein, NR-U PDU can also be called NR-U packet (NR-U packet).

In an example, in a scenario where the first network device is the DU of the access network device, and the upper node of the first network device is the CU of the access network device, the first multicast data may be PDCP PDU, or RLC SDU, or SYNC PDU, or NR-U PDU, or GTP-U PDU.

In another example, in a scenario where the first network device is an access network device or a CU of an access network device, and the upper node of the first network device is a core network device, the first multicast data may be SYNC PDU, or NR -U PDU, or GTP-U PDU.

S802. The first network device determines that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells.

Wherein, synchronous transmission can be understood as transmitting the same data on the same resource at the same sending time. "Other cells" may be cells corresponding to other network devices other than the first network device, or other cells corresponding to the first network device.

The specific implementation manner of step S802 will be described in detail below.

S803. The first network device sends the first multicast data to the terminal device on the first resource, where the first resource is a resource other than the second resource, and the second resource is used to synchronously transmit the multicast data of the first service with other cells. Correspondingly, the terminal device receives the first multicast data on the first resource.

It can be understood that the second resource may be part or all of the third resource, and the third resource is a resource used by the terminal device for inter-cell synchronous transmission, that is, the third resource is a common resource for all services. Rather than specific resources for a certain service, the second resource is a resource used to transmit data of the first service among the third resources.

The first resource may be some or all of the resources other than the second resource. For example, the first resource may be part or all of resources other than the third resource. Alternatively, the first resource may be part or all of the third resource except the second resource. Alternatively, the first resource may include part or all of the third resources except the second resource, and part or all of the resources other than the third resource.

Optionally, the first network device may also send first information to the terminal device, where the first information is used to indicate the first resource. By indicating the first resource to the terminal device, the first network device enables the terminal device to receive multicast data from resources other than the SFN resource, that is, the second resource.

Three examples of the first information are introduced below.

Example 1, the first information indicates the first search space. Wherein, the first search space is used for the terminal device to detect scheduling information of resources for transmitting multicast data.

A specific implementation manner of Example 1 is that the first information may indicate the duration of the first search space, and the duration of the first search space is greater than the duration of the search space corresponding to the second scheduling information. The search space corresponding to the second scheduling information is used by the terminal device to detect the second scheduling information. Hereinafter, the search space corresponding to the second scheduling information is referred to as the second search space.

Wherein, the second scheduling information is used to indicate that the multicast data of the first service is transmitted synchronously with other cells on the second resource, and the first scheduling information hereinafter is used to indicate that the multicast data of the first service is transmitted on the first resource .

Optionally, if the second resource includes the PDCCH resource, the search space corresponding to the second scheduling information may also be described as the search space of the second resource. If the first resource includes the PDCCH resource, the search space corresponding to the first scheduling information may also be described as the search space of the first resource.

The duration may be the duration of a burst (burst), and may also be understood as the number of resources in the continuous time domain. Duration may also be referred to as duration. Taking the duration of the second search space as an example, assuming that the time-domain resource unit is a time slot, as shown in Figure 9, slots 0-2 and slots 5-7 are the second search spaces, where slots 0-2 can be regarded as A group of continuous time-domain resources can also be regarded as a burst, slots 5-7 can be regarded as a group of continuous time-domain resources, and can also be regarded as a burst, and the duration of the second search space is 3 time slots. To illustrate with reference to FIG. 9, the duration of the second search space in FIG. 9 is 3 time slots, while the duration of the first search space in the embodiment of the present application may be greater than 3 time slots. For example, the duration of the first search space The duration is 4 time slots. As shown in FIG. 10 , the first search space includes time slots 0-3 and time slots 5-8. The terminal device may detect first scheduling information on time slot 3 and time slot 8, so as to receive multicast data on a first resource other than the second resource according to the first scheduling information.

In the above example, by increasing the time domain resources of the first search space, the first search space may include not only the search space corresponding to the second scheduling information, but also the search space corresponding to the first scheduling information, so that the terminal device can The first scheduling information is detected in a search space other than the search space corresponding to the second scheduling information, so that the multicast data can be received on the first resource.

Another specific implementation manner of Example 1 is that the first information may indicate two sets of parameters of the first search space, where the first set of parameters may correspond to the first scheduling information, and the second set of parameters may correspond to the second scheduling information.

Wherein, the first set of parameters may include, but is not limited to, at least one of the following items: the monitoring cycle of the PDCCH corresponding to the first scheduling information, the offset time slot of the PDCCH corresponding to the first scheduling information, and the continuous monitoring time corresponding to the first scheduling information. The number of slots (duration). To illustrate with reference to Figure 9, the monitoring period of the PDCCH corresponding to the first scheduling information is 4 time slots, the offset time slot is 3, and the duration time slot is 1. Based on this, slot 3 and slot 8 can be scheduled to receive data.

The second set of parameters may include, but is not limited to, at least one of the following: the monitoring period of the PDCCH corresponding to the second scheduling information, the offset time slot of the PDCCH corresponding to the second scheduling information, and the number of continuous monitoring time slots corresponding to the second scheduling information (duration). An example is given in conjunction with Figure 9. The monitoring period of the PDCCH corresponding to the second scheduling information is 4 time slots, the offset time slot is 0, and the continuous time slot is 3. Based on this, slots 0 to 2 and slots 5 to 7 can be scheduled to receive data.

In another example, the first information may indicate a third search space. Wherein, the third search space is used for the terminal device to detect the first scheduling information.

For illustration with reference to FIG. 9, slots 0-2 and slots 5-7 are search spaces corresponding to the second scheduling information, and slot 3 and slot 8 may be search spaces corresponding to the first scheduling information, that is, the third search space.

In another example, the first information is DCI carried in the second resource, and the first information indicates the first resource. For example, the first information is DCI carried in the second resource in a format (format) of format 1-1, and it can also be described as the first information being DCI 1-1 carried in the second resource, wherein, DCI 1-1 1 can indicate whether K0 configured in RRC signaling is used, and the specific K0 value used. In this example, the first resource can be indicated by the K0 value. The K0 value specifically refers to the number of time slots offset between the time slot where the resource scheduled by the DCI is located and the time slot where the DCI is transmitted. For example, when DCI is transmitted at Slot n, K0= 2, it means that the DCI schedules resources in Slot n+2.

Usually, the DCI carried by the second resource can only schedule the second resource, that is, the resource indicated by the K0 value is within the second resource, but in this example, the DCI carried by the second resource is enabled to indicate resources other than the second resource, such as through The RRC signaling configuration can indicate the K0 value of the first resource, and indicate the use of the K0 value through the DCI 1-1 carried by the second resource, so that the terminal device can use the DCI detected in the second resource outside the second resource Receive multicast data on resources.

In a possible embodiment, the identifier used for scrambling the first scheduling information is the same as the identifier used for scrambling the second scheduling information. For example, both the first scheduling information and the second scheduling information are scrambled by using a group radio network temporary identifier (group radio network temporary identifier, G-RNTI).

In the above method, by using the same identifier to scramble the first scheduling information and the second scheduling information, the terminal device can determine that the multicast data transmitted on the first resource and the multicast data transmitted on the second resource belong to the same service .

In this embodiment of the present application, multicast data that cannot be transmitted synchronously with other cells is transmitted on resources other than those used for synchronous transmission of multicast data by the cell, so that the multicast data can be transmitted synchronously without affecting other cells. The multicast data that has been received but cannot be transmitted synchronously with other cells is sent to the terminal equipment, so as to make up for the defects of the current multicast data synchronous transmission, improve the transmission efficiency of the multicast data of the first service, and improve the performance of the first service. Data integrity can improve the service experience of the first service.

The implementation of S802 is described below with an example.

Implementation manner 1: The first network device determines that the second multicast data is lost, and the first multicast data and the second multicast data correspond to the same wireless transmission block.

Wherein, "the loss of the second multicast data" may refer to that the first network device does not receive the second multicast data from the upper node. Alternatively, it may also mean that the time when the first network device receives the second multicast data from the upper-level node is later than the time when the first network device sends the second multicast data to the terminal device. Alternatively, it may also mean that the first network device has not received the second multicast data before the sending time. "The first multicast data and the second multicast data correspond to the same wireless transmission block" can be understood as, if the second multicast data is successfully obtained, the first multicast data and the second multicast data should be encapsulated in the same wireless transmission block. transmission in transmission blocks. Alternatively, if the second multicast data is successfully obtained, the first multicast data and the second multicast data should be transmitted on the same wireless transmission block.

The second multicast data corresponds to the same wireless transmission block as the first multicast data, and because the second multicast data is lost, the data included in the wireless transmission block is incomplete compared with the data included in the wireless transmission block of other cells, so The wireless transmission block of the first network device cannot perform synchronous transmission with the wireless transmission block of other cells, so the first multicast data included in the wireless transmission block of the first network device cannot be synchronized with the first multicast data of other cells. Data is transmitted synchronously.

In the embodiment of the present application, by sending the first multicast data to the terminal device on a resource other than the second resource, the first multicast data can be transmitted to the terminal device without affecting the synchronous transmission of other cells, thereby improving The transmission efficiency of the multicast data of the first service can also improve the data integrity of the first service, thereby improving the service experience of the first service.

Implementation Mode 2: After receiving the first time information, the first network device receives second time information, the first time information indicates the sending time of the first multicast data, and the second time information indicates the sending time of the third multicast data , the first multicast data and the third multicast data belong to the same multicast service. It is determined according to the second time information that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells.

Optionally, determining that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells according to the second time information may refer to determining that the first multicast data cannot be completed before the sending time indicated by the second time information Sent or too late to send. Alternatively, it may also be described as determining that the sending time of the first multicast data is after the sending time indicated by the second time information, or that the sending time of the first multicast data determined according to the first time information is different from that indicated by the second time information The interval between the sending times is less than or equal to a preset time, so that the sending of the first multicast data cannot be completed before the sending time indicated by the second time information.

In an exemplary description, the first multicast data may be the multicast data corresponding to the first time information that is too late to be sent before the sending time indicated by the second time information.

In the second implementation manner, the first time information is different from the second time information.

In an example, the time information corresponding to a group of multicast data obtained by the first network device may be the same, assuming that multicast data group 1 corresponds to the first time information, the next group of multicast data in multicast data group 1 That is, the multicast data group 2 corresponds to the second time information. The first time information is different from the second time information. Specifically, the sending time indicated by the second time information may be later than the sending time indicated by the first time information.

Wherein, the time information corresponding to the multicast data in the multicast data group 1 is the first time information, that is, the sending time of the multicast data group 1 is determined according to the first time information, and the time information in the multicast data group 1 is sequentially sent according to the sending time. multicast data. The time information corresponding to the multicast data in the multicast data group 2 is the second time information, that is, the sending time of the multicast data group 2 is determined according to the second time information, and the multicast data in the multicast data group 2 are sequentially sent according to the sending time. broadcast data.

The multicast data group 1 includes the first multicast data, and it is determined according to the second time information that the first multicast data is too late to be sent.

With reference to the description of Term Introduction 2) above, the first network device receives first time information, where the first time information indicates the time at which multicast data associated with the first time information is sent to the terminal device. It should be noted that the multicast data associated with the first time information should be sent before the sending time indicated by the next time information, that is, the second time information. If the multicast data associated with the first time information has not been sent before the sending time indicated by the second time information due to the large amount of data, for example, the first multicast data associated with the first time information is too late to be sent in the second time information Sent before the indicated send time. In order not to affect the subsequent synchronous transmission of the multicast data associated with the second time information, in the embodiment of the present application, the multicast data that is too late to be sent, that is, the first multicast data, is sent to the terminal device on a resource other than the second resource. Through the above method, the first multicast data can be transmitted to the terminal device without affecting the synchronous transmission of the multicast data associated with the second time information, so that the transmission efficiency of the multicast data of the first service can be improved, and the The data integrity of the first service can be improved, and thus the service experience of the first service can be improved.

Implementation Mode 3, the first network device determines that the acquisition time of the first multicast data is later than the first time or the second time, the first time is the time when the first multicast data is sent to the terminal device, and the second time is at the first time before, and the second time is separated from the first time by a predetermined duration.

Wherein, the acquisition time of the first multicast data may be the time when the acquisition of the first multicast data starts, or may be the time when the acquisition of the first multicast data is completed.

The first time may be the time indicated by the time tag for sending the first multicast data. Wherein, the time stamp can refer to the relevant description in the previous terminology introduction 2), and will not be repeated here.

Implementation Mode 4: The first network device cannot determine the sending status of the multicast data before the first multicast data according to the information carried in the packet header of the first multicast data, so that the first multicast data cannot be compared with the first multicast data of other cells. Data is transmitted synchronously.

In a specific implementation manner, the first network device cannot determine the sending status of the multicast data before the first multicast data according to the information carried in the packet header of the first multicast data, which may be: according to the packet header of the first multicast data The carried information cannot determine the data packet division of the multicast data before the first multicast data, that is, the number of data packets corresponding to the multicast data before the first multicast data and the amount of data included in each data packet. Because the first network device cannot determine the packet information of the multicast data preceding the first multicast data, the first multicast data cannot be transmitted synchronously with the first multicast data of other cells.

The application scenario of the implementation mode 4 is illustrated as an example below. Before introducing the specific scenario, first introduce the header type of the data packet. The header type of the data packet has Type 1 (Type 1), where the Type 1 header can carry the data amount of the data sent before the current data packet. The division of data packets carrying data sent before the current data packet, that is, the amount of data included in each data packet. Of course, the header type of the data packet can also have other types such as Type 3 (Type 3), which will not be explained here.

An application scenario of the above-mentioned implementation mode 4 may be that continuous packet loss occurs before the first multicast data, and the packet header of the first multicast data is Type 1, and multiple multicast data are associated with the same time information, the The time information indicates the time at which the plurality of multicast data is transmitted. In this scenario, the first network device can determine the amount of data lost before the first multicast data according to the packet header of the first multicast data, but cannot determine the packet division of the data lost before the first multicast data, As a result, the first multicast data cannot be transmitted synchronously with the first multicast data of other cells.

For example, multicast data 3-8 are associated with time information 1, and the time information 1 indicates the time for sending the multicast data 3-8. When the sending time indicated by the time information 1 arrives, multicast data 3-8 are sent in sequence . Assume that the packet header of multicast data 6 indicates that 200 bytes of data were sent before multicast data 6, and the packet header of the last successfully received multicast data 2 of the first multicast data indicates that 200 bytes of data were sent before multicast data 2 Amount of 100 bytes. The first network device can determine that 100 bytes of data are lost, that is, multicast data 3 to 5 have a total of 100 bytes, but cannot determine the data volumes included in multicast data 3 to 5 respectively. The data division of the multicast data 3-5 will affect the grouping of the multicast data 6-8, that is, the correspondence between the multicast data 6-8 and the wireless transmission blocks. Therefore, since the first network device cannot determine the amount of data included in the multicast data 3-5 respectively, it cannot determine the grouping of the multicast data 6-8, and thus cannot combine the first multicast data with the first multicast data of other cells. Broadcast data is transmitted synchronously.

Referring to FIG. 11 , it is another schematic flowchart of a communication method provided by the present application. The method includes:

S1101. The first network device acquires first multicast data of a first service.

For details of step S1101, reference may be made to S801 in FIG. 8 above, which will not be repeated here.

S1102. The first network device sends scheduling information. Wherein, the scheduling information is used to indicate the resources for sending the first multicast data. If the first multicast data cannot be transmitted synchronously with the first multicast data of other cells, the scheduling information uses the first identifier for scrambling. If the first multicast data If the broadcast data can be transmitted synchronously with the first multicast data of other cells, the scheduling information is scrambled by using the second identifier. Correspondingly, the terminal device uses the first identifier and the second identifier to descramble the scheduling information.

Wherein, "descrambling scheduling information" may also be described as "detection scheduling information", or may also be described as "monitoring scheduling information" and the like.

For example, as shown in Figure 12, it is assumed that slots 0-2 and slots 5-7 are used to transmit multicast data synchronously with other cells. The first network device determines that the multicast data on slot 0, slot 1, and slot 5-7 can be transmitted synchronously with the multicast data of other cells, and the multicast data on slot 2 cannot be transmitted synchronously with the multicast data of other cells. Perform synchronous transfers. The first network device uses the second identifier to scramble the scheduling information of slot 0, slot 1, and slots 5-7, and uses the first identifier to scramble the scheduling information of slot 2. Correspondingly, the terminal device uses the first identifier and the second identifier to descramble the scheduling information of slots 0-2 and slots 5-7. If the scheduling information of slot 0, slot 1, and slot 5-7 is successfully descrambled using the second identifier, the terminal device receives multicast data transmitted synchronously with other cells. If the scheduling information of slot 2 is successfully descrambled using the first identifier, the terminal device determines that the multicast data sent by the cell on slot 2 is not synchronized with the multicast data carried by other cells on slot 2.

Exemplarily, the first identifier may be at the cell level, or, the first identifier may also be at the access network device level. For example, the first identifier may be a cell-level G-RNTI.

The second identifier may be an identifier used for semi-persistent scheduling. For example, the second identifier may be a configured scheduling radio network temporary identifier (CS-RNTI), or a group configured scheduling radio network temporary identifier (G-CS-RNTI) .

Optionally, the first network device may determine that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells through the method described in S802 in FIG. 8 . Relevant descriptions in Implementation Mode 1, Implementation Mode 2, and Implementation Mode 5 will not be repeated here.

In a possible implementation manner, before step S1102 or S1101, the first network device may configure the first identifier and the second identifier for the terminal device. For example, the first network device may send to the terminal device an identifier of the multicast service corresponding to the first multicast data, such as a temporary mobile group identity (temporary mobile group identity, TMGI), the first identifier, and the second identifier. Correspondingly, after receiving the identifier of the multicast service, the first identifier and the second identifier, the terminal device uses the first identifier and the second identifier to descramble the scheduling information of the resources corresponding to the multicast service.

In a specific implementation manner, the first network device may instruct the terminal device to use the first identifier and the second identifier to descramble the scheduling information through RRC configuration information. Optionally, the RRC configuration information may be sent on a multicast logical channel or in a system message.

Optionally, the first network device may further configure the search space corresponding to the foregoing scheduling information to the terminal device. Correspondingly, the terminal device may use the first identifier and the second identifier to descramble the scheduling information in the search space.

S1103. The first network device sends the first multicast data on the resource indicated by the scheduling information. Correspondingly, the terminal device receives the first multicast data on the resources indicated by the scheduling information.

Through the above method, the terminal device can distinguish between multicast data that can be synchronized with other cells and multicast data that cannot be synchronized with other cells. The multicast data is not synchronized with the multicast data sent by other cells on the resources indicated by the scheduling information. The multicast data sent on the resource indicated by the scheduling information is synchronous.

In this embodiment of the application, different RNTIs are used to distinguish between multicast data that can be transmitted synchronously with other cells and multicast data that cannot be transmitted synchronously with other cells, so that the network device can reduce the multicast data that cannot be synchronized with other cells. In the case of the impact of multicast data on the synchronous transmission mechanism of multicast data, the multicast data that has been received but cannot be synchronized with other cells is sent to the terminal device, so as to make up for the current defect of synchronous transmission of multicast data and improve the first The transmission efficiency of the multicast data of a service can also improve the data integrity of the first service and the service experience of the first service. Moreover, in the embodiment of the present application, the resource for sending multicast data that cannot be transmitted synchronously with other cells is still the resource that should transmit the multicast data synchronously. Broadcasting data can improve resource utilization and reduce the complexity of resource configuration.

Referring to FIG. 13 , it is another schematic flowchart of a communication method provided by the present application. The method includes:

S1301. The first network device sends first configuration information to the terminal device. Correspondingly, the terminal device receives the first configuration information.

Wherein, the first configuration information includes configuration information of the first radio link control RLC bearer and configuration information of the second RLC bearer, the first RLC bearer is used for point-to-point transmission, and the second RLC bearer is used for point-to-multipoint transmission.

It should be noted that the first configuration information may be sent by one message or by multiple messages, which is not specifically limited in this application. Wherein, the message carrying the first configuration information may be an RRC reconfiguration message, an RRC recovery message, a system message, and the like.

The first configuration information is described as an example below.

Example 1, the first configuration information further includes an identifier of the first multicast radio bearer and an identifier of the second multicast radio bearer, wherein the RLC bearer corresponding to the first multicast radio bearer includes the first RLC bearer, and the second multicast radio bearer The RLC bearer corresponding to the bearer includes the second RLC bearer.

For example, the first configuration information may include radio bearer configuration and RLC bearer configuration, wherein the radio bearer configuration may include a multicast radio bearer list, and the multicast radio bearer list includes the identifier of the first multicast radio bearer and the second multicast radio bearer bearer identifiers. In addition, the multicast radio bearer list may also include identifiers of other multicast radio bearers, which is not specifically limited here. Optionally, the radio bearer configuration may further include a PDCP configuration, where the PDCP configuration is used to configure the PDCP corresponding to the first multicast radio bearer and the PDCP corresponding to the second multicast radio bearer.

The RLC bearer configuration may include at least one RLC configuration, specifically, the at least one RLC configuration includes a first RLC bearer and a second RLC bearer. The RLC bearer configuration may also include the identifiers of the radio bearers corresponding to the at least one RLC bearer. Specifically, the RLC bearer configuration includes the identifier of the first multicast radio bearer corresponding to the first RLC bearer, and the identifier of the second multicast radio bearer corresponding to the second RLC bearer. The identity of the multicast radio bearer.

Example 2, the first configuration information further includes the identifier of the first multicast radio bearer. The difference between Example 1 and Example 2 is that Example 2 does not include the above-mentioned identifier of the second multicast radio bearer.

An application scenario of Example 2 may be that the configuration information carried by the second RLC is configured for broadcast. The first configuration information may not include the identifier of the second multicast radio bearer.

Example 3, the first configuration information may further include an identifier of a third multicast radio bearer, where the RCL bearer corresponding to the third multicast radio bearer includes the first RLC bearer and the second RLC bearer.

For example, the first configuration information may include a radio bearer configuration and an RLC bearer configuration, where the radio bearer configuration may include a multicast radio bearer list, and the multicast radio bearer list includes an identifier of a third multicast radio bearer. In addition, the multicast radio bearer list may also include identifiers of other radio bearers, which is not specifically limited here. Optionally, the radio bearer configuration may further include a PDCP configuration, where the PDCP configuration is used to configure the PDCP corresponding to the third radio bearer.

The RLC bearer configuration may include at least one RLC configuration, specifically, the at least one RLC configuration includes a first RLC bearer and a second RLC bearer. The RLC bearer configuration may further include identifiers of radio bearers respectively corresponding to the at least one RLC bearer. Specifically, the RLC bearer configuration includes identifiers of third radio bearers corresponding to the first RLC bearer and the second RLC bearer.

Example 4, the first configuration information further includes the identifier of the fourth multicast radio bearer and the identifier of the first data radio bearer, wherein the RLC bearer corresponding to the fourth multicast radio bearer includes the second RLC bearer, and the first data radio bearer corresponds to The RLC bearers include the first RLC bearer.

For example, the first configuration information may include a radio bearer configuration and an RLC bearer configuration, where the radio bearer configuration may include a multicast radio bearer list and a data radio bearer identifier, and the multicast radio bearer list includes an identifier of a fourth multicast radio bearer, The data radio bearer list includes the identifier of the first data radio bearer. In addition, the multicast radio bearer list may also include identifiers of other multicast radio bearers, and the data radio bearer list may also include identifiers of other data radio bearers, which are not specifically limited here. Optionally, the radio bearer configuration may also include a PDCP configuration, and the PDCP configuration is used to configure the PDCP corresponding to the fourth multicast radio bearer and the PDCP corresponding to the first data radio bearer.

The RLC bearer configuration may include at least one RLC configuration, specifically, the at least one RLC configuration includes a first RLC bearer and a second RLC bearer. The RLC bearer configuration may also include the identifiers of the radio bearers corresponding to the at least one RLC bearer. Specifically, the RLC bearer configuration includes the identifier of the fourth multicast radio bearer corresponding to the first RLC bearer, and the first RLC bearer corresponding to the second RLC bearer. The identity of the data radio bearer.

Example 5, the first configuration information further includes the identifier of the first data radio bearer.

An application scenario of Example 5 may be that the configuration information carried by the second RLC is configured for broadcast. The first configuration information may not include the identifier of the fourth multicast radio bearer.

S1302. The first network device acquires first multicast data of the first service.

For details of step S1302, reference may be made to S801 in FIG. 8 above, which will not be repeated here.

S1303. The first network device determines that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells.

Optionally, the first network device may determine that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells through the method described in S802 in FIG. 8 . Relevant descriptions of implementation manners 1 to 4 will not be repeated here.

S1304. The first network device sends the first multicast data through the first RLC bearer. Correspondingly, the terminal device receives the first multicast data through the first RLC bearer.

In the embodiment of the present application, the multicast data that cannot be transmitted synchronously with other cells is sent to the terminal device through point-to-point transmission, so that the multicast data that has been received but cannot be transmitted synchronously with other cells can be received without affecting the synchronous transmission of multicast data The multicast data synchronized by other cells is sent to the terminal equipment, which can make up for the defects of the multicast data synchronous transmission mechanism, improve the transmission efficiency of the multicast data of the first service, and can also improve the data integrity of the first service, and then can Improve the service experience of the first service.

An embodiment of the present application provides a communication device. The communication device may be used to implement the functions of the terminal device involved in the foregoing embodiments, and the communication device may include the structure shown in FIG. 5 and/or FIG. 6 .

An embodiment of the present application provides a communication device. The communication device may be used to implement the functions of the first network device involved in the foregoing embodiments, and the communication device may include the structure shown in FIG. 5 and/or FIG. 7 .

An embodiment of the present application provides a communication system. The communication system may include at least one terminal device and at least one network device, where the terminal device and the network device in the communication system may execute the method shown in any one of the foregoing method embodiments.

The embodiment of the present application also provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is executed by a computer, the computer can implement any one of the above-mentioned method embodiments. A process related to the terminal device or the first network device.

The embodiment of the present application also provides a computer program product, which is used to store a computer program. When the computer program is executed by a computer, the computer can realize any one of the above method embodiments shown in the embodiment and the terminal device. Or a process related to the first network device.

The embodiment of the present application also provides a chip or a chip system, the chip may include a processor, and the processor may be used to call the program or instruction in the memory, execute any one of the above method embodiments shown in the embodiment and the terminal device Or a process related to the first network device. The system-on-a-chip may include the chip, and other components such as a memory or a transceiver.

An embodiment of the present application further provides a circuit, which can be coupled with a memory, and can be used to execute a process related to the terminal device or the first network device in any one of the above method embodiments. The chip system may include the chip, and other components such as a memory or a transceiver.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

A communication method, characterized in that the method comprises:

acquiring first multicast data of the first service;

determining that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells;

Send the first multicast data to the terminal device on a first resource, where the first resource is a resource other than a second resource, and the second resource is used to synchronously transmit the multicast of the first service with other cells data.
The method according to claim 1, wherein the identifier used for scrambling the first scheduling information is the same as the identifier used for scrambling the second scheduling information, wherein the first scheduling information is used to indicate The multicast data of the first service is transmitted on the resource, and the second scheduling information is used to indicate that the multicast data of the first service is transmitted synchronously with other cells on the second resource.
The method according to claim 1 or 2, further comprising:

Sending first information to the terminal device, where the first information is used to indicate the first resource.
The method according to claim 3, wherein the first information indicates the duration of the first search space, and the duration of the first search space is greater than the duration of the search space corresponding to the second scheduling information, so The second scheduling information is used to indicate that the multicast data of the first service is transmitted synchronously with other cells on the second resource.
The method according to claim 3, wherein the first information is downlink control information (DCI) carried in the second resource, and the first information indicates the first resource.
The method according to any one of claims 1-5, wherein the determining that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells comprises:

It is determined that the second multicast data is lost, wherein the first multicast data and the second multicast data correspond to the same wireless transmission block.
The method according to any one of claims 1-5, wherein the determining that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells comprises:

After receiving the first time information, receiving second time information, the first time information indicates the sending time of the first multicast data, and the second time information indicates the sending time of the third multicast data, so The first multicast data and the third multicast data belong to the same multicast service;

It is determined according to the second time information that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells.
The method according to any one of claims 1-5, wherein the determining that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells comprises:

determining that the acquisition time of the first multicast data is later than a first time or a second time, the first time is the time when the first multicast data is sent to the terminal device, and the second time is located at the before the first time, and the second time is separated from the first time by a predetermined duration.
A communication method, characterized in that the method comprises:

acquiring first multicast data of the first service;

sending scheduling information, where the scheduling information is used to indicate resources for sending the first multicast data, wherein if the first multicast data cannot be transmitted synchronously with the first multicast data of other cells, the The scheduling information is scrambled using the first identifier, and if the first multicast data can be transmitted synchronously with the first multicast data of other cells, the scheduling information is scrambled using the second identifier;

sending the first multicast data on resources indicated by the scheduling information.
The method according to claim 9, wherein the first identification is at the cell level, or the first identification is at the access network equipment level.
The method according to claim 9 or 10, wherein the second identifier is an identifier for semi-persistent scheduling.
The method according to any one of claims 9-11, wherein the method further comprises:

If the second multicast data is lost, it is determined that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells;

Wherein, the first multicast data and the second multicast data correspond to the same wireless transmission block.
The method according to any one of claims 9-11, wherein the method further comprises:

If the acquisition time of the first multicast data is later than the first time or the second time, it is determined that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells;

Wherein, the first time is the time when the first multicast data is sent to the terminal device, the second time is before the first time, and the second time is separated from the first time Scheduled duration.
A communication method, characterized in that the method comprises:

Descrambling the scheduling information by using the first identifier and the second identifier, the first identifier is used to descramble the scheduling information of resources that cannot transmit multicast data synchronously with other cells, and the second identifier is used to descramble the resource that can transmit multicast data with other cells Descrambling the resource scheduling information of the cell synchronously transmitting multicast data;

Multicast data is received according to the scheduling information.
The method according to claim 14, wherein the first identification is at the cell level, or the first identification is at the access network equipment level.
The method according to claim 14 or 15, wherein the second identifier is an identifier for semi-persistent scheduling.
A communication method, characterized in that the method comprises:

Sending first configuration information to the terminal device, where the first configuration information includes configuration information of a first radio link control RLC bearer and configuration information of a second RLC bearer, the first RLC bearer is used for point-to-point transmission, and the first RLC bearer is used for point-to-point transmission. Two RLC bearers are used for point-to-multipoint transmission;

Obtain the first multicast data;

determining that the first multicast data cannot be transmitted synchronously with multicast data of other cells;

sending the first multicast data through the first RLC bearer.
The method according to claim 17, wherein the first configuration information further includes an identifier of a first multicast radio bearer and an identifier of a second multicast radio bearer, wherein the first multicast radio bearer corresponds to The RLC bearer includes the first RLC bearer, and the RLC bearer corresponding to the second multicast radio bearer includes the second RLC bearer.
The method according to claim 17, wherein the first configuration information further includes an identifier of a first multicast radio bearer, wherein the RLC bearer corresponding to the first multicast radio bearer includes the first RLC bearer.
The method according to claim 17, wherein the first configuration information further includes an identifier of a third multicast radio bearer, wherein the RCL bearer corresponding to the third multicast radio bearer includes the first RLC bearer and the second RLC bearer.
The method according to claim 17, wherein the first configuration information further includes an identifier of the fourth multicast radio bearer and an identifier of the first data radio bearer, wherein the fourth multicast radio bearer corresponds to The RLC bearer includes the second RLC bearer, and the RLC bearer corresponding to the first data radio bearer includes the first RLC bearer.
The method according to claim 17, wherein the first configuration information further includes an identifier of a first data radio bearer, wherein the RLC bearer corresponding to the first data radio bearer includes the first RLC bearer.
The method according to any one of claims 17-22, wherein the determining that the first multicast data cannot be transmitted synchronously with multicast data of other cells comprises:

It is determined that the second multicast data is lost, wherein the first multicast data and the second multicast data correspond to the same wireless transmission block.
The method according to any one of claims 17-22, wherein the determining that the first multicast data cannot be transmitted synchronously with multicast data of other cells comprises:

After receiving the first time information, receiving second time information, the first time information indicates the sending time of the first multicast data, and the second time information indicates the sending time of the third multicast data, so The first multicast data and the third multicast data belong to the same multicast service;

It is determined according to the second time information that the first multicast data cannot be transmitted synchronously with multicast data of other cells.
The method according to any one of claims 17-22, wherein the determining that the first multicast data cannot be transmitted synchronously with multicast data of other cells comprises:

determining that the acquisition time of the first multicast data is later than a first time or a second time, the first time is the time when the first multicast data is sent to the terminal device, and the second time is located at the before the first time, and the second time is separated from the first time by a predetermined duration.
A communication device, characterized in that the device includes:

A processing module, configured to acquire first multicast data of the first service; and

determining that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells;

A transceiver module, configured to send the first multicast data to a terminal device on a first resource, where the first resource is a resource other than a second resource, and the second resource is used to transmit the first multicast data synchronously with other cells. Multicast data of a service.
The device according to claim 26, wherein the identifier used for scrambling the first scheduling information is the same as the identifier used for scrambling the second scheduling information, wherein the first scheduling information is used to indicate The multicast data of the first service is transmitted on the resource, and the second scheduling information is used to indicate that the multicast data of the first service is transmitted synchronously with other cells on the second resource.
The device according to claim 26 or 27, wherein the transceiver module is also used for:

Sending first information to the terminal device, where the first information is used to indicate the first resource.
The device according to claim 28, wherein the first information indicates the duration of the first search space, and the duration of the first search space is greater than the duration of the search space corresponding to the second scheduling information, so The second scheduling information is used to indicate that the multicast data of the first service is transmitted synchronously with other cells on the second resource.
The device according to claim 28, wherein the first information is downlink control information (DCI) carried in the second resource, and the first information indicates the first resource.
The device according to any one of claims 26-30, wherein the processing module, when determining that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells, specifically Used for:

It is determined that the second multicast data is lost, wherein the first multicast data and the second multicast data correspond to the same wireless transmission block.
The device according to any one of claims 26-30, wherein the processing module, when determining that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells, specifically Used for:

After the first time information is received by the transceiver module, second time information is received by the transceiver module, the first time information indicates the sending time of the first multicast data, and the second time information indicates The sending time of the third multicast data, the first multicast data and the third multicast data belong to the same multicast service;

It is determined according to the second time information that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells.
The device according to any one of claims 26-30, wherein the processing module, when determining that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells, specifically Used for:

determining that the acquisition time of the first multicast data is later than a first time or a second time, the first time is the time when the first multicast data is sent to the terminal device, and the second time is located at the before the first time, and the second time is separated from the first time by a predetermined duration.
A communication device, characterized in that the device includes:

A processing module, configured to acquire the first multicast data of the first service;

A transceiver module, configured to send scheduling information, where the scheduling information is used to indicate resources for sending the first multicast data, wherein, if the first multicast data cannot be synchronized with the first multicast data of other cells transmission, the scheduling information is scrambled using the first identifier, and if the first multicast data can be transmitted synchronously with the first multicast data of other cells, the scheduling information is scrambled using the second identifier ;

sending the first multicast data on resources indicated by the scheduling information.
The apparatus according to claim 34, wherein the first identifier is at the cell level, or, the first identifier is at the access network equipment level.
The device according to claim 34 or 35, wherein the second identifier is an identifier for semi-persistent scheduling.
The device according to any one of claims 34-36, wherein the processing module is further configured to:

If the second multicast data is lost, it is determined that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells;

Wherein, the first multicast data and the second multicast data correspond to the same wireless transmission block.
The device according to any one of claims 34-36, wherein the processing module is further configured to:

If the acquisition time of the first multicast data is later than the first time or the second time, it is determined that the first multicast data cannot be transmitted synchronously with the first multicast data of other cells;

Wherein, the first time is the time when the first multicast data is sent to the terminal device, the second time is before the first time, and the second time is separated from the first time Scheduled duration.
A communication device, characterized in that the device includes:

Transceiver module, used for network equipment to communicate;

A processing module, configured to use a first identifier and a second identifier to descramble the scheduling information, the first identifier is used to descramble the scheduling information of resources that cannot transmit multicast data synchronously with other cells, and the second identifier is used to for descrambling the scheduling information of resources capable of synchronously transmitting multicast data with other cells; and

receiving multicast data through the transceiver module according to the scheduling information.
The apparatus according to claim 39, wherein the first identifier is at the cell level, or, the first identifier is at the access network equipment level.
The device according to claim 39 or 40, wherein the second identifier is an identifier for semi-persistent scheduling.
A communication device, characterized in that the device includes:

A transceiver module, configured to send first configuration information to a terminal device, where the first configuration information includes configuration information of a first radio link control RLC bearer and configuration information of a second RLC bearer, and the first RLC bearer is used for point-to-point transmission, the second RLC bearer is used for point-to-multipoint transmission;

And, acquire the first multicast data;

A processing module, configured to determine that the first multicast data cannot be transmitted synchronously with multicast data of other cells;

The transceiver module is further configured to send the first multicast data through the first RLC bearer.
The apparatus according to claim 42, wherein the first configuration information further includes an identifier of a first multicast radio bearer and an identifier of a second multicast radio bearer, wherein the first multicast radio bearer corresponds to The RLC bearer includes the first RLC bearer, and the RLC bearer corresponding to the second multicast radio bearer includes the second RLC bearer.
The apparatus according to claim 42, wherein the first configuration information further includes an identifier of a first multicast radio bearer, wherein the RLC bearer corresponding to the first multicast radio bearer includes the first RLC bearer.
The apparatus according to claim 42, wherein the first configuration information further includes an identifier of a third multicast radio bearer, wherein the RCL bearer corresponding to the third multicast radio bearer includes the first RLC bearer and the second RLC bearer.
The apparatus according to claim 42, wherein the first configuration information further includes an identifier of the fourth multicast radio bearer and an identifier of the first data radio bearer, wherein the fourth multicast radio bearer corresponds to The RLC bearer includes the second RLC bearer, and the RLC bearer corresponding to the first data radio bearer includes the first RLC bearer.
The apparatus according to claim 42, wherein the first configuration information further includes an identifier of a first data radio bearer, wherein the RLC bearer corresponding to the first data radio bearer includes the first RLC bearer.
The device according to any one of claims 42-47, wherein the processing module, when determining that the first multicast data cannot be transmitted synchronously with multicast data of other cells, is specifically configured to:

It is determined that the second multicast data is lost, wherein the first multicast data and the second multicast data correspond to the same wireless transmission block.
The device according to any one of claims 42-47, wherein the processing module, when determining that the first multicast data cannot be transmitted synchronously with multicast data of other cells, is specifically configured to:

After receiving the first time information, receiving second time information, the first time information indicates the sending time of the first multicast data, and the second time information indicates the sending time of the third multicast data, so The first multicast data and the third multicast data belong to the same multicast service;

It is determined according to the second time information that the first multicast data cannot be transmitted synchronously with multicast data of other cells.
The device according to any one of claims 42-47, wherein the processing module, when determining that the first multicast data cannot be transmitted synchronously with multicast data of other cells, is specifically configured to:

determining that the acquisition time of the first multicast data is later than a first time or a second time, the first time is the time when the first multicast data is sent to the terminal device, and the second time is located at the before the first time, and the second time is separated from the first time by a predetermined duration.
A communication device, characterized by comprising: a processor, the processor is coupled to a memory, and the memory is used to store instructions;

The processor is configured to call and execute the instruction from the memory, so that the communication device executes the method according to any one of claims 1-8, or makes the communication device execute the method according to any one of claims 1-8. The method according to any one of claims 9-13, or causing the communication device to execute the method according to any one of claims 17-25.
A communication device, characterized by comprising: a processor, the processor is coupled to a memory, and the memory is used to store instructions;

The processor is configured to call and execute the instruction from the memory, so that the communication device executes the method according to any one of claims 14-16.
A computer-readable storage medium, characterized in that instructions are stored in the computer-readable storage medium, and when the instructions are invoked and executed on a computer, the computer executes any one of claims 1-25. method described in the item.
A computer program product, characterized by comprising instructions, which, when run on a computer, cause the computer to execute the method according to any one of claims 1-25.
A circuit, characterized in that the circuit is coupled to a memory, and the circuit is used to read and execute instructions stored in the memory to perform the method according to any one of claims 1-25.