A transmission method, device and storage medium

Abstract

The application provides a transmission method, device and storage medium. The method comprises the following steps: receiving configuration information of broadcast or groupcast service from a second communication node; and receiving broadcast or groupcast service data according to the configuration information of the broadcast or groupcast service.

Description

Technical Field

[0001] This application relates to communications, specifically to a transmission method, apparatus, and storage medium. Background Technology

[0002] The demand for broadcast services in cellular networks has always existed, with applications expanding from initial terrestrial television video broadcasting to vertical sectors such as public safety, connected vehicles, and the Internet of Things (IoT). However, the Evolved Multimedia Broadcast / Multicast Services (eMBMS) architecture in 4G has limited the expansion of cellular broadcast technology in these and other application scenarios. In 5G systems, how to rationally and effectively implement the transmission of broadcast or multicast services is a pressing issue that needs to be addressed. Summary of the Invention

[0003] This application provides a transmission method, device, and storage medium that enable the transmission of broadcast or multicast services.

[0004] This application provides a transmission method applied to a first communication node, including:

[0005] Receive configuration information for broadcast or multicast services from the second communication node;

[0006] Receive broadcast or multicast service data according to the configuration information of the broadcast or multicast service.

[0007] This application provides a transmission method applied to a second communication node, including:

[0008] Send the configuration information for broadcast or multicast services to the first communication node.

[0009] This application provides a transmission method applied to a third communication node, including:

[0010] Generate configuration information for the first broadcast or multicast service;

[0011] The message carrying the configuration information of the first broadcast or multicast service is sent to the fourth communication node.

[0012] This application provides a transmission method applied to a fourth communication node, including:

[0013] Receive configuration information for the first broadcast or multicast service sent by the third communication node;

[0014] Generate configuration information for a second broadcast or multicast service.

[0015] This application provides a transmission device applied to a first communication node, comprising:

[0016] The first receiver is configured to receive configuration information for broadcast or multicast services from the second communication node;

[0017] The second receiver is configured to receive broadcast or multicast service data according to the configuration information of the broadcast or multicast service.

[0018] This application provides a transmission device applied to a second communication node, comprising:

[0019] The transmitter is configured to send broadcast or multicast service configuration information to the first communication node.

[0020] This application provides a transmission device applied to a third communication node, comprising:

[0021] The generation module is configured to generate configuration information for the first broadcast or multicast service.

[0022] The transmitter is configured to send a message carrying configuration information of the first broadcast or multicast service to the fourth communication node.

[0023] This application provides a transmission device applied to a fourth communication node, comprising:

[0024] The receiver is configured to receive configuration information for the first broadcast or multicast service sent by the third communication node;

[0025] The generation module is configured to generate configuration information for a second broadcast or multicast service.

[0026] This application provides a device including: a communication module, a memory, and one or more processors;

[0027] The communication module is configured to perform communication interaction between a first communication node, a second communication node, a third communication node, or a fourth communication node.

[0028] The memory is configured to store one or more programs;

[0029] When the one or more programs are executed by the one or more processors, the one or more processors implement the method described in any of the above embodiments.

[0030] This application provides a storage medium storing a computer program, which, when executed by a processor, implements the methods described in any of the above embodiments. Attached Figure Description

[0031] Figure 1This is a flowchart of a transmission method provided in an embodiment of this application;

[0032] Figure 2 This is a flowchart of another transmission method provided in an embodiment of this application;

[0033] Figure 3 This is a flowchart of yet another transmission method provided in the embodiments of this application;

[0034] Figure 4 This is a flowchart of another transmission method provided in the embodiments of this application;

[0035] Figure 5 This is a mapping diagram of the information contained in a message of a broadcast or multicast service system provided in an embodiment of this application;

[0036] Figure 6 This is a schematic diagram illustrating the transmission of messages in a broadcast or multicast service system, as provided in an embodiment of this application.

[0037] Figure 7 This is a flowchart illustrating how a UE reads MTCH configuration information on a broadcast or multicast service control channel, as provided in an embodiment of this application.

[0038] Figure 8 This is a recursive relationship diagram for a UE receiving broadcast or multicast service data provided in an embodiment of this application;

[0039] Figure 9 This is an interactive flowchart of system messages for broadcast or multicast service control channel configuration information provided in an embodiment of this application;

[0040] Figure 10 This is an interactive flowchart of system messages for another broadcast or multicast service control channel configuration information provided in an embodiment of this application;

[0041] Figure 11 This is an interactive flowchart of an RRC message for transmitting channel configuration information for broadcast or multicast services, provided in an embodiment of this application.

[0042] Figure 12 This is an interactive flowchart of configuration information for a broadcast or multicast service channel provided in an embodiment of this application;

[0043] Figure 13 This is a structural block diagram of a transmission device provided in an embodiment of this application;

[0044] Figure 14 This is a structural block diagram of another transmission device provided in the embodiments of this application;

[0045] Figure 15 This is a structural block diagram of another transmission device provided in the embodiments of this application;

[0046] Figure 16 This is a structural block diagram of another transmission device provided in the embodiments of this application;

[0047] Figure 17 This is a schematic diagram of the structure of a device provided in an embodiment of this application. Detailed Implementation

[0048] The embodiments of this application will be described below with reference to the accompanying drawings.

[0049] The eMBMS technology in Long Term Evolution (LTE) has undergone nearly a decade of development, from 3GPP Release 9 (R9) to the latest Release 16 (R16). Traditional eMBMS broadcast network architectures are designed for semi-static video service distribution. For example, LTE eMBMS air interface distribution does not rely on user feedback, or only has optional and limited feedback, allowing the network to understand user reception interests and reception quality to a limited extent. The network cannot flexibly schedule services; for example, it cannot dynamically adjust broadcast areas or dynamically adjust the resource consumption of broadcasts. These factors all contribute to a certain degree of waste of air interface resources, thus hindering the use and promotion of this technology.

[0050] The Single Cell Point-to-Multipoint (SC-PTM) technology introduced in Release 13 (R13) was introduced to address the flexibility of air interface scheduling to some extent. However, SC-PTM technology essentially relies on the network architecture established in Release 9. SC-PTM is essentially based on the original architecture, adding a new air interface data transport method. This transport method is based on the independent scheduling of a single cell and the flexible use of air interface resources. For example, instead of using the Physical Multicast Channel (PMCH) channel used in the traditional eMBMS Multicast Broadcast Single Frequency Network (MBSFN), it uses the Physical Downlink Shared Channel (PDSCH) channel, which is consistent with unicast data, enabling dynamic and flexible scheduling. Although SC-PTM introduces some flexibility to the air interface, it fails to solve the problems at the architecture level: the semi-static configuration characteristics of the broadcast area, the dynamic adjustment of its area depends on the driving force of the service layer, and it cannot be linked with the flexible and powerful UE air interface connection management within the existing 3GPP, so as to achieve efficient utilization of resources and a certain degree of guarantee for service reliability and continuity.

[0051] In 5G systems, a new broadcast architecture for 5G is defined, supporting multicast and targeting new service types such as public safety, CIoT, and V2X. In the first version of 5G supporting multicast broadcast, a flexible multicast broadcast architecture is provided to support these diverse scenarios, adaptable to different needs, such as ad-hoc multicast / broadcast streams, transparent IPv4 / IPv6 multicast transmission, IPTV, wireless software transmission, group communications and broadcast / multicast physical network applications, V2X applications, and public safety. This architecture provides a certain level of reliability while supporting energy-efficient, resource-constrained receiving devices. It also allows UEs to switch between point-to-point and point-to-multipoint receiving modes, achieving a balance between reliability and receiving efficiency. Furthermore, NR will support basic UE mobility to ensure continuous service reception during handover / reselection scenarios. Additionally, NR will support UE uplink feedback, further improving UE reception reliability. In view of this, the introduction of broadcast / multicast service support schemes in NR, and how to configure system messages for broadcast or multicast service configuration information to transmit broadcast or multicast services, is an urgent problem to be solved.

[0052] Figure 1This is a flowchart illustrating a transmission method provided in an embodiment of this application. This embodiment is executed by a first communication node. Exemplarily, the first communication node can be a user equipment (UE). Figure 1 As shown, this embodiment includes: S110-S120.

[0053] S110. Receive configuration information for broadcast or multicast services from the second communication node.

[0054] In this embodiment, the configuration information for broadcast or multicast services refers to the relevant configuration information for broadcast or multicast services. The second communication node refers to the wireless access network side; exemplarily, the second communication node can be a base station or a base station distributed unit.

[0055] S120. Receive broadcast or multicast service data according to the configuration information of the broadcast or multicast service.

[0056] In this embodiment, after configuring the configuration information for the broadcast or multicast service, the second communication node sends the configuration information for the broadcast or multicast service to the first communication node, so that the first communication node receives the broadcast or multicast service data according to the configuration information for the broadcast or multicast service.

[0057] In one embodiment, the second communication node includes one of the following: a base station; a base station distributed unit. In this embodiment, when the second communication node is a base station distributed unit, the second communication node can send configuration information of broadcast or multicast services to the first communication node via a System Information Block (SIB) to notify the first communication node of the configuration information of broadcast or multicast services on the current carrier frequency and adjacent carrier frequencies, and enable the first communication node to report the broadcast or multicast services of interest to the current serving cell according to the configuration information of the broadcast or multicast services.

[0058] In one embodiment, the configuration information for broadcast or multicast services includes at least one of the following: broadcast or multicast service system information; configuration information for broadcast or multicast service control channels; configuration information for broadcast or multicast service transmission channels; and bearer configuration information for broadcast or multicast services.

[0059] In one embodiment, the broadcast or multicast service system information includes at least one of the following: a list of service areas supported on the current frequency; a list of service areas supported on adjacent frequencies; downlink frequencies of adjacent carriers; and identification information for the broadcast or multicast service. In this embodiment, the list of service areas supported on the current frequency or adjacent frequencies can be determined by a Service Area Identifier (SAI), i.e., the SAI is used to determine the area of ​​one or more cells that a broadcast or multicast service can cover. Such an area is called a service area and can be used by the core network to indicate the coverage area of ​​a broadcast or multicast service. In this embodiment, the list of service areas supported on the current frequency refers to the service areas determined according to the SAI list supported on the current frequency; the list of SAIs supported on adjacent frequencies refers to the service areas determined according to the SAI lists supported on frequencies adjacent to the current frequency; and the downlink frequencies of adjacent carriers refer to each downlink frequency of a carrier adjacent to the current frequency.

[0060] In one embodiment, when the configuration information of a broadcast or multicast service includes broadcast or multicast service system information, receiving the configuration information of a broadcast or multicast service from a second communication node includes: receiving broadcast or multicast service information via system messages or dedicated Radio Resource Control (RRC) messages.

[0061] In one embodiment, the broadcast or multicast service control channel configuration information includes at least one of the following: identification information of the broadcast or multicast service; repetition period of the broadcast or multicast service control channel; offset of the broadcast or multicast service control channel; start timeslot of the broadcast or multicast service control channel; duration of the broadcast or multicast service control channel; modification period of the broadcast or multicast service control channel; and bandwidth portion identifier of the broadcast / multicast service control channel.

[0062] In one embodiment, when the configuration information for a broadcast or multicast service includes configuration information for a broadcast or multicast service control channel, receiving the configuration information for a broadcast or multicast service from the second communication node includes: receiving the configuration information for a broadcast or multicast service control channel via a system message or a dedicated RRC message.

[0063] In one embodiment, the broadcast or multicast service transmission channel configuration information includes at least one of the following: broadcast or multicast service identification information; broadcast or multicast service radio interface identification information; broadcast or multicast service service service area identification information; neighbor cell list; and broadcast or multicast service transmission channel scheduling configuration information.

[0064] In one embodiment, the scheduling configuration information for the broadcast or multicast service transmission channel includes: a persistent timer for the broadcast or multicast transmission channel; a discontinuous reception correlation (DRX) timer for the broadcast or multicast service transmission channel; a scheduling period for the broadcast or multicast service transmission channel; a scheduling offset for the broadcast or multicast service transmission channel; and a bandwidth portion identifier for the broadcast or multicast service transmission channel.

[0065] In one embodiment, when the configuration information of a broadcast or multicast service includes broadcast or multicast service transmission channel configuration information, receiving the configuration information of a broadcast or multicast service from the second communication node includes: receiving the broadcast or multicast service transmission channel configuration information via system messages, RRC messages transmitted on the broadcast or multicast service control channel, or dedicated RRC messages.

[0066] In one embodiment, the bearer configuration information for broadcast or multicast services includes at least one of the following: identification information for broadcast or multicast services; radio interface identification information for broadcast or multicast services; service area identification information for broadcast or multicast services; a neighbor cell list; configuration information for the radio bearer of the radio interface of broadcast or multicast services; and an air interface transmission mode indication for broadcast or multicast services. The air interface transmission mode indication for broadcast or multicast services includes: unicast transmission indication or multicast transmission indication.

[0067] In one embodiment, the configuration information of the air interface radio bearer for broadcast or multicast services includes at least one of the following: identification information of the air interface radio bearer for broadcast or multicast services; sequence number length of the Packet Data Convergence Protocol (PDCP) layer; maximum context identifier reordering timer; sequence number length of the Radio Link Control (RLC) layer; and reassembly timer.

[0068] In one embodiment, when the configuration information of a broadcast or multicast service includes the bearer configuration information of the broadcast or multicast service, receiving the configuration information of the broadcast or multicast service from the second communication node includes: receiving the bearer configuration information of the broadcast or multicast service through system messages, RRC messages transmitted on the broadcast or multicast service control channel, or dedicated RRC messages.

[0069] Figure 2 This is a flowchart of another transmission method provided in an embodiment of this application. This embodiment is applied to a second communication node. Figure 2 As shown, this embodiment includes: S210.

[0070] S210. Send the configuration information for broadcast or multicast services to the first communication node.

[0071] In this embodiment, the second communication node configures the broadcast or multicast service, generates configuration information for the broadcast or multicast service, and sends the configuration information to the first communication node so that the first communication node receives the broadcast or multicast service data according to the configuration information.

[0072] In one embodiment, the second communication node includes one of the following: a base station; a base station distributed unit.

[0073] In one embodiment, the configuration information for broadcast or multicast services includes at least one of the following: broadcast or multicast service system information; configuration information for broadcast or multicast service control channels; configuration information for broadcast or multicast service transmission channels; and bearer configuration information for broadcast or multicast services.

[0074] In one embodiment, the broadcast or multicast service system information includes at least one of the following: a list of service areas supported on the current frequency; a list of service areas supported on adjacent frequencies; downlink frequencies of adjacent carrier frequencies; and identification information of the broadcast or multicast service.

[0075] In one embodiment, when the configuration information of the broadcast or multicast service includes broadcast or multicast service information, sending the configuration information of the broadcast or multicast service to the first communication node includes: sending the broadcast or multicast service information to the first communication node via system message or dedicated RRC message.

[0076] In one embodiment, the broadcast or multicast service control channel configuration information includes at least one of the following: identification information of the broadcast or multicast service; repetition period of the broadcast or multicast service control channel; offset of the broadcast or multicast service control channel; start timeslot of the broadcast or multicast service control channel; duration of the broadcast or multicast service control channel; modification period of the broadcast or multicast service control channel; and identifier of the bandwidth portion of the broadcast / multicast in the control channel.

[0077] In one embodiment, when the configuration information of the broadcast or multicast service includes broadcast or multicast service control channel configuration information, sending the configuration information of the broadcast or multicast service to the first communication node includes: sending the broadcast or multicast service control channel configuration information to the first communication node via system message or dedicated RRC message.

[0078] In one embodiment, the broadcast or multicast service transmission channel configuration information includes at least one of the following: identification information of the broadcast or multicast service; radio interface identification information of the broadcast or multicast service; service area identification information of the broadcast or multicast service; a neighboring cell list; and broadcast or multicast service transmission channel scheduling configuration information.

[0079] In one embodiment, the broadcast or multicast service transmission channel scheduling configuration information includes: a persistent timer for the broadcast or multicast transmission channel; a DRX-related timer for the broadcast or multicast service transmission channel; a scheduling period for the broadcast or multicast service transmission channel; a scheduling offset for the broadcast or multicast service transmission channel; and a bandwidth portion identifier for the broadcast or multicast service transmission channel.

[0080] In one embodiment, when the configuration information of the broadcast or multicast service includes broadcast or multicast service transmission channel configuration information, sending the broadcast or multicast service configuration information to the first communication node includes: sending the broadcast or multicast service transmission channel configuration information to the first communication node through system messages, RRC messages transmitted on the broadcast or multicast service control channel, or dedicated RRC messages.

[0081] In one embodiment, the bearer configuration information for broadcast or multicast services includes at least one of the following: identification information for broadcast or multicast services; radio interface identification information for broadcast or multicast services; service area identification information for broadcast or multicast services; a neighbor cell list; configuration information for the radio bearer of the radio interface of broadcast or multicast services; and an air interface transmission mode indication for broadcast or multicast services. The air interface transmission mode indication for broadcast or multicast services includes: unicast transmission indication or multicast transmission indication.

[0082] In one embodiment, the configuration information of the air interface radio bearer for broadcast or multicast services includes at least one of the following: identification information of the air interface radio bearer for broadcast or multicast services; sequence number length of the PDCP layer; maximum context identifier; reordering timer; sequence number length of the RLC layer; and reassembly timer.

[0083] In one embodiment, when the configuration information of a broadcast or multicast service includes the bearer configuration information of the broadcast or multicast service, sending the configuration information of the broadcast or multicast service to the first communication node includes: sending the bearer configuration information of the broadcast or multicast service to the first communication node through system messages, RRC messages transmitted on the broadcast or multicast service control channel, or dedicated RRC messages.

[0084] In one embodiment, Figure 3 This is a flowchart illustrating another transmission method provided in an embodiment of this application. This embodiment is applied to a third communication node. Exemplarily, the third communication node is a distributed unit (DU). Figure 3 As shown, this embodiment includes: S310-S320.

[0085] S310, Generate configuration information for the first broadcast or multicast service.

[0086] S320: Send a message carrying configuration information for the first broadcast or multicast service to the fourth communication node.

[0087] In one embodiment, the configuration information of the first broadcast or multicast service includes at least one of the following: configuration information of the broadcast or multicast control channel; broadcast or multicast transmission channel scheduling configuration information; and RLC bearer configuration information of the broadcast or multicast service.

[0088] In one embodiment, the configuration information for the first broadcast or multicast service includes at least one of the following:

[0089] Identification information of broadcast or multicast services; repetition period of broadcast or multicast service control channels; offset of broadcast or multicast service control channels; start timeslot of broadcast or multicast service control channels; duration of broadcast or multicast service control channels; modification period of broadcast or multicast service control channels; bandwidth portion identifier of broadcast or multicast service control channels.

[0090] In one embodiment, when the configuration information of the first broadcast or multicast service includes the configuration information of the broadcast or multicast service control channel, the transmission method applied to the third communication node further includes: assembling and encoding the configuration information of the broadcast or multicast service control channel to generate a message of the broadcast or multicast service control channel configuration information; and sending the message of the broadcast or multicast service control channel configuration information to the first communication node.

[0091] In this embodiment, the message containing the broadcast or multicast service control channel configuration information can be a system message or an RRC message.

[0092] In one embodiment, the transmission method applied to the third communication node further includes: receiving a message containing configuration information of a third broadcast or multicast service sent by a fourth communication node; and sending the message carrying the configuration information of the third broadcast or multicast service to the first communication node.

[0093] In this embodiment, the configuration information message for the third broadcast or multicast service is a message obtained by assembling and encoding the configuration information for the first broadcast or multicast service and the configuration information for the second broadcast or multicast service. The configuration information message for the third broadcast or multicast service is the message corresponding to the configuration information of the broadcast or multicast service involved in the embodiments applied to the first and second communication nodes described above. In other words, the configuration information of the broadcast or multicast service exchanged between the first and second communication nodes is the configuration information of the third broadcast or multicast service involved in the third communication node.

[0094] In one embodiment, the broadcast / multicast service transmission channel scheduling configuration information includes at least one of the following: a persistent timer for the broadcast or multicast service transmission channel; a DRX-related timer for the broadcast or multicast service transmission channel; a scheduling period for the broadcast or multicast service transmission channel; a scheduling offset for the broadcast or multicast service transmission channel; and a bandwidth portion identifier for the broadcast or multicast service control channel.

[0095] In one embodiment, the RLC bearer configuration information for broadcast or multicast services includes at least one of the following: identification information of the air interface radio bearer for broadcast or multicast services; sequence number length of the RLC layer; reassembly timer; and logical channel identifier (LCID).

[0096] In one embodiment, Figure 4 This is a flowchart of another transmission method provided in an embodiment of this application. This embodiment is applied to a fourth communication node. Exemplarily, the fourth communication node can be a centralized unit (CU). Figure 4 As shown, this embodiment includes: S410-S420.

[0097] S410: Receive configuration information for the first broadcast or multicast service sent by the third communication node;

[0098] S420: Generate configuration information for a second broadcast or multicast service.

[0099] In one embodiment, the configuration information of the second broadcast or multicast service includes at least one of the following: broadcast or multicast service system information; configuration information of the broadcast or multicast service transmission channel; bearer configuration information of the broadcast or multicast service; and configuration information change notification for the broadcast or multicast service.

[0100] In one embodiment, the transmission method applied to the fourth communication node further includes: assembling and encoding configuration information of the first broadcast or multicast service and configuration information of the second broadcast or multicast service to generate a message of configuration information of the third broadcast or multicast service; and sending the message of configuration information of the third broadcast or multicast service to the third communication node. In this embodiment, the explanation of the message of configuration information of the third broadcast or multicast service is as described in the above embodiment applied to the third communication node, and will not be repeated here.

[0101] In this embodiment, the configuration information message for broadcast or multicast services can be a system message or an RRC message.

[0102] In one implementation, taking the first communication node as the UE and the second communication node as the radio access network side, and using the transmission of configuration information for broadcast or multicast services via system messages, and the broadcast or multicast service configuration information being broadcast or multicast service system information as an example, the transmission process (i.e., the sending and receiving process) of the configuration information for broadcast or multicast services is explained. In a 5G NR system, the radio access network side provides broadcast or multicast service services to the UE. The network side sends a message providing broadcast or multicast service system information to the UE, and the UE can use this message to determine whether to report interests (i.e., target services). The broadcast or multicast service system information includes any combination or at least one of the following: a list of service areas supported on the current frequency point, a list of service areas supported on adjacent frequency points, downlink frequency points of adjacent carrier frequencies, and identification information of the broadcast or multicast service. The identification information of the broadcast or multicast service is used to uniquely identify the broadcast or multicast service. For example, Figure 5 This is a mapping diagram of information contained in a message of a broadcast or multicast service system provided in an embodiment of this application, such as... Figure 5 As shown, taking the correspondence between the frequency points, SAI, and TMGI information related to the broadcast service indicated in the system information message of the broadcast or multicast service as an example, the relationship of the included information is explained. f1 and f2 represent the current frequency point and the adjacent frequency point, respectively; SAI1 and SAI2 indicate that the SAI identifiers are 1 and 2, respectively. The UE reports the services of interest based on the information obtained from the system message of the broadcast or multicast service information. In the embodiment, the UE obtains the frequency point, SAI, and identification information of the broadcast or multicast service of interest from the system message of the broadcast or multicast service information, and then the UE reports the frequency point of interest and / or the identification information of the broadcast or multicast service of interest to the currently serving cell through an RRC message.

[0103] from Figure 5 The information contained in the system messages of NR-Broadcast Multicast Service (MBMS) can be seen to include MBMS SAI information on the current carrier frequency and adjacent carrier frequencies. This MBMS SAI information originates from the CU side of the network (base stations in 5G systems are divided into CU and DU). In other words, the information contained in the system messages of NR-Broadcast Multicast Service (MBMS) can be generated and encoded by the CU. Figure 6 This is a schematic diagram illustrating the transmission of messages in a broadcast or multicast service system, as provided in an embodiment of this application. Figure 6 As shown, this embodiment includes: S510-540.

[0104] S510 and CU generate and encode broadcast or multicast service system information.

[0105] S520 and CU send broadcast or multicast service system information to DU.

[0106] S530 and CU send indication information to DU indicating that the SIB type is broadcast or multicast service system information.

[0107] S540 and DU send broadcast or multicast service system information to UE via the air interface.

[0108] In this embodiment, the CU generates broadcast or multicast service system information, and then assembles and encodes it. The CU sends the assembled and encoded broadcast or multicast service system information to the DU via an F1 message. The F1 message may include: a setup response message, a GNB-CU configuration update message, a GNB-CU configuration update confirmation message, or other F1 messages. Simultaneously, the CU needs to indicate that the SIB type is broadcast or multicast service system information. The DU then transmits the broadcast or multicast service system information to the UE via air interface broadcast.

[0109] In one embodiment, broadcast or multicast service system information messages can also be sent on demand over the air interface, meaning the CU side sends broadcast or multicast service system information based on the UE's request. In this embodiment, the transmission of broadcast or multicast service system information differs depending on the UE's state.

[0110] For idle or inactive UEs, the UE requests broadcast or multicast service system information from the DU via random access message 1 (msg1) or random access message 3 (msg3) over the air interface. After receiving the request, the DU informs the CU of the list of UEs requesting broadcast or multicast service system information via an F1 message (e.g., GNB-DU configuration update message, GNB-CU configuration update confirmation message, or other F1 messages). The CU then instructs the DU to send the broadcast or multicast service system information over the air interface via an F1 message.

[0111] For a connected UE, the UE sends a dedicated RRC message to the CU requesting broadcast or multicast service system information. The CU then instructs the DU to send the broadcast or multicast service system information message. In addition, the base station also sends an on-demand allocation (ON-Demand) message to the UE via an RRC message indicating support for broadcast or multicast service system information.

[0112] Furthermore, if a base station needs to send broadcast or multicast service system information, it must first broadcast the scheduling information for the broadcast or multicast service system information within the cell via SIB1, including the broadcast start position, transmission period, and transmission window length of the system message for the broadcast or multicast service information. The UE can receive the broadcast or multicast service system information sent by the base station on the Downlink Shared Channel (DL-SCH) through the System Information-Radio Network Temporary Identity (SI-RNTI).

[0113] In one implementation, taking the first communication node as the UE and the second communication node as the radio access network side, and using the transmission of broadcast or multicast service configuration information via system messages, and the broadcast or multicast service configuration information being the configuration information of the broadcast or multicast service control channel as an example, the transmission process (including sending and receiving processes) of the broadcast or multicast service configuration information configuration information (including sending and receiving processes) is described. In a 5G NR system, the radio access network side provides broadcast or multicast service services to the UE. The network side sends a system message to the UE providing broadcast or multicast service configuration information, and the UE can obtain the configuration information of the current cell's broadcast or multicast service control channel through this system message. The UE can retrieve the broadcast or multicast service control channel by reading the configuration information of the broadcast or multicast service control channel. In this embodiment, the UE can receive the configuration information of the broadcast or multicast service transmission channel (i.e., the multicast traffic channel (MTCH) configuration information) on the broadcast or multicast service control channel. Figure 7 This is a flowchart illustrating how a UE reads MTCH configuration information on a broadcast or multicast service control channel, as provided in an embodiment of this application. Figure 7 As shown, this embodiment includes: S610.

[0114] S610: Send MTCH configuration information to the UE.

[0115] In this embodiment, by parsing the MTCH configuration message, the UE can receive broadcast or multicast service data on the broadcast or multicast service transmission channel.

[0116] Figure 8 This is a recursive relationship diagram for a UE receiving broadcast or multicast service data, provided in an embodiment of this application. For example... Figure 8As shown, the UE processes the following steps: reads a system message containing broadcast or multicast service configuration information -> retrieves the broadcast or multicast service control channel -> receives the configuration information of the broadcast or multicast service transmission channel -> receives broadcast or multicast service data on the broadcast or multicast service transmission channel. In this embodiment, the UE reads a system message containing broadcast or multicast service configuration information, retrieves the broadcast or multicast service control channel from the system message, receives the configuration information of the broadcast or multicast service transmission channel on the broadcast or multicast service control channel, and further receives broadcast or multicast service data on the broadcast or multicast service transmission channel.

[0117] During the process of a UE receiving broadcast or multicast service data, the broadcast or multicast service control channel configuration information carried in the system message of the broadcast or multicast service configuration information includes any combination or at least one of the following: identification information of the broadcast or multicast service; repetition period of the broadcast or multicast service control channel; offset of the broadcast or multicast service control channel; start timeslot of the broadcast or multicast service control channel; duration of the broadcast or multicast service control channel; modification period of the broadcast or multicast service control channel; and bandwidth portion identifier of the broadcast or multicast service control channel.

[0118] During the process of a UE receiving broadcast or multicast service data, the configuration information of the broadcast or multicast service transmission channel transmitted on the broadcast or multicast service control channel includes: a list of broadcast or multicast service transmission channel configuration information. Each broadcast or multicast service transmission channel configuration information includes any combination or at least one of the following: identification information of the broadcast or multicast service; radio interface identification information of the broadcast or multicast service; service area identification information of the broadcast or multicast service; a neighboring cell list; and broadcast or multicast service transmission channel scheduling configuration information. The broadcast or multicast service transmission channel scheduling configuration information includes any combination or at least one of the following: a persistent timer for the broadcast or multicast service transmission channel; a DRX-related timer for the broadcast or multicast service transmission channel; a scheduling period for the broadcast or multicast service transmission channel; a scheduling offset for the broadcast or multicast service transmission channel; and a bandwidth portion identifier for the broadcast or multicast service transmission channel.

[0119] In one embodiment, the broadcast or multicast service channel configuration information may further include broadcast or multicast bearer configuration information. The broadcast or multicast service bearer configuration information includes any combination or at least one of the following: broadcast or multicast service identification information; broadcast or multicast service radio interface identification information; broadcast or multicast service service service area identification information; neighbor cell list; configuration information of the broadcast or multicast service air interface radio bearer; and broadcast or multicast service air interface transmission mode indication. The broadcast or multicast service air interface radio bearer configuration information includes any combination or at least one of the following: broadcast or multicast service air interface radio bearer identification information; PDCP layer sequence number length; maximum context identifier; reordering timer; RLC layer sequence number length; and T-Reassembly timer.

[0120] In one embodiment, the bearer configuration information for the aforementioned broadcast or multicast service may further include a broadcast or multicast service air interface transmission mode indication. This indication may include any combination of the following: unicast transmission indication and multicast transmission indication. The broadcast or multicast service air interface transmission mode indication is used to indicate whether the broadcast or multicast service uses unicast or multicast transmission.

[0121] As can be seen from the information contained in the system messages of the broadcast or multicast service configuration information mentioned above, these messages can include broadcast or multicast service control channel configuration information, i.e., physical layer time-frequency resource configuration information. This information originates from the DU side. Therefore, the content of the system messages for broadcast or multicast service configuration information is generated by the DU. However, the process of encoding and indicating who sends this system information on the F1 interface includes the following two schemes:

[0122] Option 1: The configuration information for the broadcast or multicast service control channel is generated and assembled by the DU side to obtain the system message of the broadcast or multicast service control channel configuration information. Figure 9 This is a flowchart illustrating the interaction of system messages for broadcast or multicast service control channel configuration information, as provided in an embodiment of this application. Figure 9 As shown, this embodiment includes: S710-S740.

[0123] S710 and DU generate and assemble encoded broadcast or multicast service control channel configuration information, and generate system messages containing broadcast or multicast service control channel configuration information.

[0124] S720: Sends a system message containing the configuration information for the broadcast or multicast service control channel to the CU.

[0125] S730 and CU send system message indication information to DU, which is of type SIB and is broadcast or multicast service control channel configuration information.

[0126] S740 and DU send system messages to the UE to configure the broadcast or multicast service control channel.

[0127] In one embodiment, the DU generates and encodes broadcast or multicast service control channel configuration information, assembling it into a system message containing the broadcast or multicast service control channel configuration information. The DU carries this assembled system message within a gNB-DU system message and notifies the CU via an F1 setup request message, a GNB-DU configuration update message, or other F1 messages. The CU then instructs the DU to send the system message to the UE via the F1 interface over the air interface. In one embodiment, the CU does not instruct the DU to send the system message; instead, the DU periodically broadcasts the broadcast / multicast control channel configuration information system message.

[0128] Option 2: The broadcast or multicast service control channel configuration information is generated by the DU side and assembled and encoded by the CU side to obtain the system message of the broadcast or multicast service control channel configuration information. Figure 10 This is an interactive flowchart of system messages for broadcast or multicast service control channel configuration information provided in another embodiment of this application. For example... Figure 10 As shown, this embodiment includes: S810-S860.

[0129] S810 and DU generate broadcast or multicast service control channel configuration information.

[0130] S820 and DU send the broadcast or multicast service control channel configuration information to CU.

[0131] S830, encodes broadcast or multicast service control channel configuration information, and generates a system message containing broadcast or multicast service control channel configuration information.

[0132] The S840 and CU send system messages to the DU to configure the broadcast or multicast service control channel.

[0133] S850 and CU send system message indication information to DU, which is of type SIB and is broadcast or multicast service control channel configuration information.

[0134] S860 and DU send system messages to the UE to configure the broadcast or multicast service control channel.

[0135] In one embodiment, the DU generates broadcast or multicast service control channel configuration information but does not encode it. The DU then carries this information in a gNB-DU system message and notifies the CU via an F1 setup request message, a GNB-DU configuration update message, or another F1 message. Upon receiving the broadcast or multicast service control channel configuration information, the CU assembles and encodes it to obtain a system message containing the broadcast or multicast service configuration information. The CU carries this assembled and encoded system message in the SIB message element of the gNB-CU system message and sends it as a byte stream to the DU via an F1 setup response message, a GNB-CU configuration update message, a GNB-CU configuration update confirmation message, or another F1 message. The CU then instructs the DU to transmit the message to the UE via the air interface on the F1 interface. In one embodiment, the CU does not instruct the DU to transmit; instead, the DU periodically broadcasts the system message assembled into broadcast or multicast service configuration information.

[0136] In both of the above schemes, the system messages assembled into broadcast or multicast service configuration information support both broadcast transmission and on-demand broadcast transmission over the air interface. That is, the CU side sends the system messages for broadcast or multicast service configuration information based on the UE's request. In the embodiment, the transmission of the system messages for broadcast or multicast service configuration information differs depending on the UE's state. For idle or inactive UEs, the UE requests the system messages for broadcast or multicast service configuration information from the DU via msg1 or msg3 over the air interface. Upon receiving this request, the DU compiles a list of UEs requesting the system messages for broadcast or multicast service configuration information and informs the CU via an F1 message (e.g., GNB-DU configuration update message or GNB-CU configuration update confirmation) or other F1 messages. The CU then instructs the DU to send the system messages for broadcast or multicast service configuration information over the air interface via a system message response message or other F1 messages.

[0137] For connected UEs, the UE sends a dedicated RRC message to the CU requesting a system message containing broadcast or multicast service configuration information. The CU then instructs the DU to send the system message containing the broadcast or multicast service configuration information. Additionally, the base station also sends an ON-Demand message to the UE via the RRC message, indicating support for the system message containing broadcast or multicast service configuration information.

[0138] Furthermore, when the base station sends system messages containing broadcast or multicast service configuration information, it pre-indicates the scheduling information of the broadcast or multicast service system messages by broadcasting SIB1 within the cell. This information includes the start position of the broadcast or multicast service system message, the transmission period, and the transmission window length. The UE can receive the broadcast or multicast service system messages sent by the base station on the DL-SCH via SI-RNTI.

[0139] In one embodiment, it can be seen from the information contained in the configuration information of the broadcast or multicast service transmission channel described above that part of the information is generated by the DU and part is generated by the CU. The interaction process of the configuration information of the broadcast / multicast service transmission channel on the F1 interface between the CU and DU is described. In this embodiment, the generation and transmission process of the configuration information of the broadcast or multicast service transmission channel includes: the DU side generates its own broadcast or multicast service transmission channel configuration information and sends it to the CU; then the CU generates its own broadcast or multicast service transmission channel configuration information; and the CU assembles and encodes the DU-side and CU-side information together to obtain the system message of the broadcast or multicast service transmission channel configuration information. Figure 11 This is an interactive flowchart of an RRC message for transmitting channel configuration information for broadcast or multicast services, provided in an embodiment of this application. Figure 11 As shown, this embodiment includes: S910-S940.

[0140] S910 and DU generate the first broadcast or multicast service transmission channel configuration information.

[0141] In this embodiment, the first broadcast or multicast service transmission channel configuration information refers to the broadcast or multicast service transmission channel configuration information related to the DU side.

[0142] In this embodiment, the DU side generates configuration information for broadcast or multicast service transmission channels related to the DU, and notifies the CU of the RRC message information element in the MBMS context establishment response message, MBMS context modification response (CU initialization) message, or MBMS context modification confirmation (DU initialization) message. In this embodiment, the configuration information for broadcast or multicast service transmission channels related to the DU side includes the following: a list of broadcast or multicast service transmission channel configuration information. The configuration information for each broadcast or multicast service transmission channel on the DU side includes configuration information for the broadcast or multicast service control channel; scheduling configuration information for the broadcast or multicast service transmission channel; and RLC bearer configuration information for the broadcast or multicast service. The scheduling configuration information for the broadcast or multicast service transmission channel includes any combination or at least one of the following: a duration timer for the broadcast or multicast service transmission channel; a timer related to the DRX of the broadcast or multicast service transmission channel; a scheduling period for the broadcast or multicast service transmission channel; a scheduling offset for the broadcast or multicast service transmission channel; and a bandwidth portion identifier for the broadcast or multicast service transmission channel.

[0143] In this embodiment, the RLC bearer configuration information for broadcast or multicast services includes at least one of the following: identification information of the air interface radio bearer for broadcast or multicast services; sequence number length of the RLC layer; reassembly timer; and logical information identifier.

[0144] S920 and DU send the first broadcast or multicast service transmission channel configuration information to CU.

[0145] S930 and CU generate the second broadcast or multicast service transmission channel configuration information, assemble and encode it together with the first broadcast or multicast service transmission channel configuration information, and generate an RRC message of broadcast or multicast service transmission channel configuration information.

[0146] In this embodiment, the second broadcast or multicast service transmission channel configuration information refers to the broadcast or multicast service transmission channel configuration information related to the CU side. The CU side generates CU-related broadcast or multicast service transmission channel configuration information, which includes the following: a list of broadcast or multicast service transmission channel configuration information. The configuration information for each CU-side broadcast or multicast service transmission channel includes any combination or at least one of the following: broadcast or multicast service system information; broadcast or multicast service transmission channel configuration information; broadcast or multicast service bearer configuration information; and broadcast or multicast service configuration information change notification.

[0147] In this embodiment, the configuration information for broadcast or multicast services on each CU side may further include bearer configuration information for broadcast or multicast services. Specifically, the bearer configuration information for broadcast or multicast services includes any combination or at least one of the following: identification information for the broadcast or multicast service; radio interface identification information for the broadcast or multicast service; service area identification information for the broadcast or multicast service; neighbor cell list; configuration information for the radio interface bearer of the broadcast or multicast service; radio interface transmission mode indication for the broadcast or multicast service; the radio interface transmission mode indication for the broadcast or multicast service includes: unicast transmission indication or multicast transmission indication. In this embodiment, the configuration information for the radio interface bearer of the broadcast or multicast service includes any combination or at least one of the following: identification information for the radio interface bearer of the broadcast or multicast service; sequence number length of the PDCP layer; maximum context identifier; reordering timer; sequence number length of the RLC layer; reassembly timer. In this embodiment, after the CU generates the configuration information of the CU-side broadcast or multicast service transmission channel (i.e., the configuration information of the second broadcast or multicast service transmission channel), it merges and assembles the configuration information of the DU-side broadcast or multicast service transmission channel (i.e., the configuration information of the first broadcast or multicast service transmission channel) reported by the DU into an RRC message containing the configuration information of the broadcast or multicast service transmission channel.

[0148] S940 and CU send RRC messages containing broadcast or multicast service transmission channel configuration information to DU.

[0149] In this embodiment, the CU transmits the RRC message containing the broadcast or multicast service transmission channel configuration information to the DU via the F1 message of the F1 interface (e.g., MBMS context establishment request message, MBMS context modification request message, MBMS context modification confirmation message, or other RRC message), instructing the DU to send it to the UE over the air interface.

[0150] S950 and CU send notifications of changes to broadcast or multicast service transmission channel configuration information to DU.

[0151] S960 and DU send RRC messages containing broadcast or multicast service transmission channel configuration information to the UE.

[0152] In this embodiment, the UE receives the RRC message from the DU to obtain the configuration information of the broadcast or multicast service transmission channel, further reads the broadcast or multicast service bearer MRB information of the broadcast or multicast service transmission channel, and receives the broadcast service data content.

[0153] In an embodiment, if the configuration information of the broadcast or multicast service transmission channel sent by the CU does not contain broadcast or multicast service transmission channel scheduling configuration information or g-RNTI, but contains identification information for uniquely specifying the broadcast or multicast service or TMGI information of the broadcast / multicast service, it means that the UE can send an RRC message (e.g., MBMS interest indication) to the gNB after entering the connected state to indicate its interest in receiving the broadcast / multicast service. The gNB can send the broadcast or multicast service transmission channel scheduling configuration information or g-RNTI to the UE through a dedicated RRC message, such as an RRC reconfiguration message.

[0154] In this embodiment, if the configuration information of the broadcast or multicast service transmission channel sent by the CU includes indication information for unicast transmission, it means that the UE can send an RRC message (MBMS interest indication) to the gNB after entering the connected state to indicate its interest in receiving the broadcast or multicast service. The gNB can then send the broadcast or multicast service data to the UE via unicast.

[0155] In this embodiment, when a broadcast or multicast service bearer (MRB) is created, modified, or released between the CU and DU, it means that the configuration information of the broadcast or multicast service transmission channel is modified accordingly. The CU needs to send a configuration information change indication to the DU via an MBMS context establishment request message, an MBMS context modification request (CU initialization) message, an MBMS context modification confirmation (DU initialization) message, or other F1 messages on the F1 interface. Simultaneously, the CU also needs to send the newly generated configuration information of the broadcast or multicast service transmission channel to the DU. Upon receiving the configuration information change indication, the DU sends Downlink Control Information (DCI) to the UE, indicating the change in the configuration information of the broadcast or multicast service transmission channel. At the same time, the DU sends the received configuration information of the newly generated broadcast or multicast service transmission channel to the UE over the air interface.

[0156] In one implementation, in a 5G NR system, the radio access network provides broadcast or multicast service to the UE. The network sends a system message with broadcast or multicast service channel configuration information to the UE, and the UE retrieves the broadcast or multicast service channel of the cell from this system message. Furthermore, the UE can receive broadcast or multicast service data content from the broadcast or multicast service transmission channel on the broadcast or multicast service channel.

[0157] During the aforementioned transmission process, the broadcast or multicast service transmission channel configuration information carries any combination or at least one of the following: broadcast or multicast service identification information; broadcast or multicast service radio interface identification information; and a broadcast or multicast service channel configuration information list. Each broadcast or multicast service channel configuration information list includes any combination or at least one of the following: broadcast or multicast service service area identification information; a neighboring cell list; the cell identifier where the broadcast or multicast service is located; and broadcast or multicast service transmission channel scheduling configuration information. The broadcast or multicast service transmission channel scheduling configuration information includes any combination or at least one of the following: a broadcast or multicast service transmission channel persistence timer; a broadcast or multicast service transmission channel DRX-related timer; a broadcast or multicast service transmission channel scheduling period; a broadcast or multicast service transmission channel scheduling offset; and a broadcast or multicast service transmission channel bandwidth identifier.

[0158] In this embodiment, the configuration information for the broadcast or multicast service may further include bearer configuration information for the broadcast or multicast service. This bearer configuration information includes any combination or at least one of the following: an identifier for the broadcast or multicast service; radio interface identifier information for the broadcast or multicast service; service area identifier information for the broadcast or multicast service; a neighbor cell list; configuration information for the radio interface bearer of the broadcast or multicast service; and an air interface transmission mode indication for the broadcast or multicast service. The air interface transmission mode indication includes either a unicast transmission indication or a multicast transmission indication. The configuration information for the radio interface bearer of the broadcast or multicast service includes any combination or at least one of the following: an identifier for the radio interface bearer of the broadcast or multicast service; the sequence number length of the PDCP layer; the maximum context identifier; a reordering timer; the sequence number length of the RLC layer; and a reassembly timer. In this embodiment, the channel configuration information for the broadcast or multicast service may further include a unicast indication (an indication that the MBMS broadcast or multicast service can be used for unicast transmission).

[0159] The information contained in the system messages of broadcast or multicast service channel configuration information shows that part of the information is generated by the DU and part by the CU. The interaction of broadcast or multicast service channel configuration information on the F1 interface between the CU and DU is explained. Figure 12 This is an interactive flowchart of configuration information for a broadcast or multicast service channel provided in an embodiment of this application. For example... Figure 12 As shown, in this embodiment, the process of generating and sending configuration information for broadcast or multicast service channels includes: S1010-S1060.

[0160] S1010 and DU generate configuration information for broadcast or multicast service channels related to DU.

[0161] In this embodiment, the DU side generates configuration information for DU-related broadcast or multicast service channels and notifies the CU via an MBMS context establishment response message, an MBMS context modification response (CU initialization) message, an MBMS context modification acknowledgment (DU initialization) message, or other F1 messages. In this embodiment, the configuration information for DU-related broadcast or multicast service channels includes the following: a list of broadcast or multicast service channel configuration information. Each broadcast or multicast service channel configuration information includes broadcast or multicast service channel scheduling configuration information. In this embodiment, the broadcast or multicast service channel scheduling configuration information includes any combination or at least one of the following: a broadcast or multicast service channel persistence timer; a timer related to the broadcast or multicast service channel DRX; a broadcast or multicast service channel scheduling period; a broadcast or multicast service channel scheduling offset; and a bandwidth portion identifier for the broadcast or multicast service channel.

[0162] In an embodiment, the broadcast or multicast service channel scheduling configuration information may further include the broadcast or multicast service bearer configuration information, which includes any combination or at least one of the following: identification information of the broadcast or multicast service air interface radio bearer; sequence number length of the RLC layer; and reassembly timer.

[0163] S1020 and DU send the configuration information of the broadcast or multicast service channel related to DU to CU.

[0164] S1030 and CU generate configuration information for broadcast or multicast service channels related to CU, and assemble and encode it together with configuration information for broadcast or multicast service channels related to DU to generate a message containing configuration information for broadcast or multicast service channels.

[0165] In this embodiment, the CU side generates configuration information for CU-related broadcast or multicast service channels. This configuration information includes the following: a list of broadcast or multicast service channel configuration information. Each broadcast or multicast service channel configuration information includes any combination or at least one of the following: identification information for the broadcast or multicast service; radio interface identification information for the broadcast or multicast service; service area identification information for the broadcast or multicast service; and a neighboring cell list. In this embodiment, the message in the broadcast or multicast service channel configuration information can be a system message or an RRC message.

[0166] In this embodiment, each broadcast or multicast service channel configuration information may further include broadcast or multicast service bearer configuration information. The broadcast or multicast service bearer configuration information includes any combination or at least one of the following: broadcast or multicast service identification information; broadcast or multicast service radio interface identification information; broadcast or multicast service service service area identification information; neighbor cell list; configuration information of the broadcast or multicast service air interface radio bearer; broadcast or multicast service air interface transmission mode indication; the broadcast or multicast service air interface transmission mode indication includes: unicast transmission indication or multicast transmission indication. The configuration information of the broadcast or multicast service air interface radio bearer includes any combination or at least one of the following: broadcast or multicast service air interface radio bearer identification information; PDCP layer sequence number length; maximum context identifier; reordering timer; RLC layer sequence number length; reassembly timer.

[0167] S1040 and CU send a message containing the configuration information of the broadcast or multicast service channel to DU.

[0168] In this embodiment, after the CU generates the configuration information of the CU-side broadcast / multicast service channel, it merges and assembles the configuration information of the DU-side broadcast / multicast service channel reported by the DU into a message of configuration information of the broadcast or multicast service channel. The system message information of the configuration information of the broadcast or multicast service channel is then transmitted to the DU through an MBMS context establishment request message, an MBMS context modification request (CU initialization) message, an MBMS context modification confirmation (DU initialization) message, or other F1 messages.

[0169] S1050 and CU send a notification of changes to the configuration information of the broadcast or multicast service channel to DU.

[0170] S1060 and DU send a message containing the configuration information of the broadcast or multicast service channel to the UE.

[0171] In this embodiment, after receiving the configuration information message of the broadcast or multicast service channel from the DU, the UE sends it to the UE via the air interface. The UE obtains the configuration information of the broadcast or multicast service channel from the message received from the DU, further reads the broadcast or multicast service bearer (MRB) of the broadcast or multicast service channel, and receives the broadcast service data content.

[0172] In this embodiment, if the configuration information for the broadcast or multicast service channel sent by the CU does not include broadcast or multicast service channel scheduling configuration information or g-RNTI, but does include identification information or TMGI information for uniquely specifying the broadcast or multicast service, it means that the UE can send an RRC message (MBMS Interest Indication) to the gNB after entering the connected state to indicate its interest in receiving the broadcast / multicast service. The gNB can then send the service channel scheduling configuration information or g-RNTI for the broadcast or multicast service to the UE through a dedicated RRC message, such as an RRC reconfiguration message.

[0173] In this embodiment, if the configuration information of the broadcast or multicast service channel sent by the CU includes indication information for unicast transmission, it means that the UE can send an RRC message (MBMS interest indication) to the gNB after entering the connected state to indicate its interest in receiving the broadcast or multicast service. The gNB can then send the broadcast or multicast service data to the UE via unicast.

[0174] In this embodiment, when a broadcast or multicast service bearer (MRB) is created, modified, or released between the CU and DU, it means that the configuration information of the broadcast or multicast service channel needs to be modified accordingly. The CU needs to send a configuration information change indication for the broadcast or multicast service channel to the DU via an MBMS context establishment request message, an MBMS context modification request (CU initialization) message, or an MBMS context modification confirmation (DU initialization) message or other F1 messages on the F1 interface. Simultaneously, the CU also sends the modified configuration information of the newly generated broadcast / multicast service channel to the DU. Upon receiving the configuration information change indication for the broadcast or multicast service channel, the DU sends a DCI to the UE, indicating the change in the configuration information of the broadcast / multicast service channel. At the same time, the DU sends the received configuration information of the newly generated broadcast or multicast service channel to the UE over the air interface.

[0175] In one embodiment, Figure 13 This is a structural block diagram of a transmission device provided in an embodiment of this application. This embodiment is applied to a first communication node. Figure 13 As shown, this embodiment includes: a first receiver 1110 and a second receiver 1120.

[0176] The first receiver 1110 is configured to receive configuration information for broadcast or multicast services from the second communication node;

[0177] The second receiver 1120 is configured to receive broadcast or multicast service data according to the configuration information of the broadcast or multicast service.

[0178] The transmission device provided in this embodiment is configured to achieve... Figure 1 The transmission method of the illustrated embodiment and the transmission device provided in this embodiment are similar in principle and technical effect, and will not be described again here.

[0179] In one embodiment, the second communication node includes one of the following: a base station; a base station distributed unit.

[0180] In one embodiment, the configuration information for broadcast or multicast services includes at least one of the following: broadcast or multicast service system information; configuration information for broadcast or multicast service control channels; configuration information for broadcast or multicast service transmission channels; and bearer configuration information for broadcast or multicast services.

[0181] In one embodiment, the broadcast or multicast service system information includes at least one of the following: a list of service areas supported on the current frequency; a list of service areas supported on adjacent frequencies; downlink frequencies of adjacent carrier frequencies; and identification information of the broadcast or multicast service.

[0182] In one embodiment, when the configuration information of a broadcast or multicast service includes broadcast or multicast service system information, receiving the configuration information of a broadcast or multicast service from a second communication node includes: receiving broadcast or multicast service information via system messages or dedicated RRC messages.

[0183] In one embodiment, the broadcast or multicast service control channel configuration information includes at least one of the following: identification information of the broadcast or multicast service; repetition period of the broadcast or multicast service control channel; offset of the broadcast or multicast service control channel; start timeslot of the broadcast or multicast service control channel; duration of the broadcast or multicast service control channel; modification period of the broadcast or multicast service control channel; and bandwidth portion identifier of the broadcast or multicast service control channel.

[0184] In one embodiment, when the configuration information for a broadcast or multicast service includes broadcast or multicast service control channel configuration information, receiving the configuration information for the broadcast or multicast service from the second communication node includes:

[0185] Receive broadcast or multicast service control channel configuration information via system messages or dedicated RRC messages.

[0186] In one embodiment, the broadcast or multicast service transmission channel configuration information includes at least one of the following: identification information of the broadcast or multicast service; radio interface identification information of the broadcast / multicast service; service area identification information of the broadcast or multicast service; neighbor cell list; and broadcast or multicast service transmission channel scheduling configuration information.

[0187] In one embodiment, the scheduling configuration information for the broadcast or multicast service transmission channel includes: a persistent timer for the broadcast or multicast service transmission channel; a DRX-related timer for the broadcast or multicast service transmission channel; a scheduling period for the broadcast or multicast service transmission channel; a scheduling offset for the broadcast or multicast service transmission channel; and a bandwidth portion identifier for the broadcast or multicast service transmission channel.

[0188] In one embodiment, when the configuration information of a broadcast or multicast service includes broadcast or multicast service transmission channel configuration information, receiving the configuration information of a broadcast or multicast service from the second communication node includes: receiving the broadcast or multicast service transmission channel configuration information via system messages, RRC messages transmitted on the broadcast or multicast service control channel, or dedicated RRC messages.

[0189] In one embodiment, the bearer configuration information for broadcast or multicast services includes at least one of the following: identification information for broadcast or multicast services; radio interface identification information for broadcast or multicast services; service area identification information for broadcast or multicast services; a neighbor cell list; configuration information for the radio bearer of the radio interface of broadcast or multicast services; and an air interface transmission mode indication for broadcast or multicast services. The air interface transmission mode indication for broadcast or multicast services includes: unicast transmission indication or multicast transmission indication.

[0190] In one embodiment, the configuration information of the air interface radio bearer for broadcast or multicast services includes at least one of the following: identification information of the air interface radio bearer for broadcast or multicast services; sequence number length of the PDCP layer; maximum context identifier; reordering timer; sequence number length of the RLC layer; and reassembly timer.

[0191] In one embodiment, when the configuration information of a broadcast or multicast service includes the bearer configuration information of the broadcast or multicast service, receiving the configuration information of the broadcast or multicast service from the second communication node includes: receiving the bearer configuration information of the broadcast or multicast service through system messages, RRC messages transmitted on the broadcast or multicast service control channel, or dedicated RRC messages.

[0192] Alternatively, the default configuration information can be used to carry broadcast or multicast services.

[0193] In one embodiment, Figure 14 This is a structural block diagram of another transmission device provided in an embodiment of this application. This embodiment is applied to a second communication node. Figure 14 As shown, this embodiment includes: transmitter 1210.

[0194] Transmitter 1210 is configured to send broadcast or multicast service configuration information to the first communication node.

[0195] The transmission device provided in this embodiment is configured to achieve... Figure 2 The transmission method of the illustrated embodiment and the transmission device provided in this embodiment are similar in principle and technical effect, and will not be described again here.

[0196] In one embodiment, the second communication node includes one of the following: a base station; a base station distributed unit.

[0197] In one embodiment, the configuration information for broadcast or multicast services includes at least one of the following: broadcast or multicast service system information; configuration information for broadcast or multicast service control channels; configuration information for broadcast or multicast service transmission channels; and bearer configuration information for broadcast or multicast services.

[0198] In one embodiment, the broadcast or multicast service system information includes at least one of the following: a list of service areas supported on the current frequency; a list of service areas supported on adjacent frequencies; downlink frequencies of adjacent carrier frequencies; and identification information of the broadcast or multicast service.

[0199] In one embodiment, when the configuration information of the broadcast or multicast service includes broadcast or multicast service system information, sending the configuration information of the broadcast or multicast service to the first communication node includes: sending the broadcast or multicast service information to the first communication node through a system message or a dedicated RRC message.

[0200] In one embodiment, the broadcast or multicast service control channel configuration information includes at least one of the following: identification information of the broadcast or multicast service; repetition period of the broadcast or multicast service control channel; offset of the broadcast or multicast service control channel; start timeslot of the broadcast or multicast service control channel; duration of the broadcast or multicast service control channel; modification period of the broadcast or multicast service control channel; and bandwidth portion identifier of the broadcast or multicast service control channel.

[0201] In one embodiment, when the configuration information of the broadcast or multicast service includes broadcast or multicast service control channel configuration information, sending the configuration information of the broadcast or multicast service to the first communication node includes: sending the broadcast or multicast service control channel configuration information to the first communication node via system message or dedicated RRC message.

[0202] In one embodiment, the broadcast or multicast service transmission channel configuration information includes at least one of the following: identification information of the broadcast or multicast service; radio interface identification information of the broadcast / multicast service; service area identification information of the group broadcast or multicast service; neighbor cell list; and broadcast or multicast service transmission channel scheduling configuration information.

[0203] In one embodiment, the scheduling configuration information for the broadcast or multicast service transmission channel includes: a persistent timer for the broadcast or multicast service transmission channel; a DRX-related timer for the broadcast or multicast service transmission channel; a scheduling period for the broadcast or multicast service transmission channel; a scheduling offset for the broadcast or multicast service transmission channel; and a bandwidth portion identifier for the broadcast or multicast service transmission channel.

[0204] In one embodiment, when the configuration information of the broadcast or multicast service includes broadcast or multicast service transmission channel configuration information, sending the broadcast or multicast service configuration information to the first communication node includes: sending the broadcast or multicast service transmission channel configuration information to the first communication node through system messages, RRC messages transmitted on the broadcast or multicast service control channel, or dedicated RRC messages.

[0205] In one embodiment, the bearer configuration information for broadcast or multicast services includes at least one of the following: identification information for broadcast or multicast services; radio interface identification information for broadcast or multicast services; service area identification information for broadcast or multicast services; a neighboring cell list; configuration information for the radio bearer of the radio interface of broadcast or multicast services; and an air interface transmission mode indication for broadcast or multicast services. The air interface transmission mode indication for broadcast or multicast services includes: unicast transmission indication, or multicast transmission indication.

[0206] In one embodiment, the configuration information of the air interface radio bearer for broadcast or multicast services includes at least one of the following: identification information of the air interface radio bearer for broadcast or multicast services; sequence number length of the PDCP layer; maximum context identifier; reordering timer; sequence number length of the RLC layer; and reassembly timer.

[0207] In one embodiment, the quality of service attribute information of the air interface radio bearer for broadcast or multicast services includes at least one of the following: identification information of the air interface radio bearer for broadcast or multicast services; air interface quality of service parameters of the air interface radio bearer for broadcast or multicast services; identification information of each data stream mapped to the air interface radio bearer for broadcast or multicast services; and air interface quality of service parameters of each data stream mapped to the air interface radio bearer for broadcast or multicast services.

[0208] In one embodiment, when the configuration information for a broadcast or multicast service includes the bearer configuration information for the broadcast or multicast service, sending the configuration information for the broadcast or multicast service to the first communication node includes: sending the bearer configuration information for the broadcast or multicast service to the first communication node via system messages, RRC messages transmitted on the broadcast or multicast service control channel, or dedicated RRC messages; or, configuring the bearer configuration information for the broadcast or multicast service by default.

[0209] In one embodiment, Figure 15 This is a structural block diagram of another transmission device provided in an embodiment of this application. This embodiment is applied to a third communication node. Figure 15 As shown, this embodiment includes a generation module 1310 and a transmitter 1320.

[0210] The generation module 1310 is configured to generate configuration information for the first broadcast or multicast service;

[0211] Transmitter 1320 is configured to send an F1 message carrying configuration information of the first broadcast or multicast service to the fourth communication node.

[0212] The transmission device provided in this embodiment is configured to achieve... Figure 3 The transmission method of the illustrated embodiment and the transmission device provided in this embodiment are similar in principle and technical effect, and will not be described again here.

[0213] In one embodiment, the configuration information for the first broadcast or multicast service includes at least one of the following:

[0214] Configuration information for the control channel of broadcast or multicast services; scheduling information for the transmission channel of broadcast or multicast services; configuration information for the RLC bearer of broadcast or multicast services.

[0215] In one embodiment, the configuration information of the first broadcast or multicast service includes at least one of the following: identification information of the broadcast or multicast service; repetition period of the broadcast or multicast service control channel; offset of the broadcast or multicast service control channel; start timeslot of the broadcast or multicast service control channel; duration of the broadcast or multicast service control channel; modification period of the broadcast or multicast service control channel; and bandwidth portion identifier of the broadcast or multicast service control channel.

[0216] In one embodiment, when the configuration information of the first broadcast or multicast service includes broadcast or multicast service control channel configuration information, the transmission method applied to the third communication node further includes: assembling and encoding the broadcast or multicast service control channel configuration information to generate a broadcast or multicast service control channel configuration message; and sending the broadcast or multicast service control channel configuration information message to the first communication node.

[0217] In one embodiment, the transmission method applied to the third communication node further includes: receiving a message of configuration information for a third broadcast or multicast service sent by a fourth communication node; and sending the message of configuration information for the third broadcast or multicast service to the first communication node.

[0218] In one embodiment, the scheduling configuration information for the broadcast or multicast service transmission channel includes at least one of the following: a persistent timer for the broadcast or multicast service transmission channel; a DRX-related timer for the broadcast or multicast service transmission channel; a scheduling period for the broadcast or multicast service transmission channel; a scheduling offset for the broadcast or multicast service transmission channel; and a bandwidth portion identifier for the broadcast or multicast service control channel.

[0219] In one embodiment, the RLC bearer configuration information for broadcast or multicast services includes at least one of the following: identification information of the air interface radio bearer for broadcast or multicast services; sequence number length of the RLC layer; reassembly timer; and logical information identifier.

[0220] In one embodiment, Figure 16 This is a structural block diagram of another transmission device provided in an embodiment of this application. This embodiment is applied to a fourth communication node. Figure 16 As shown, this embodiment includes a receiver 1410 and a generation module 1420.

[0221] Receiver 1410 is configured to receive configuration information for a first broadcast or multicast service sent by a third communication node;

[0222] The generation module 1420 is configured to generate configuration information for a second broadcast or multicast service.

[0223] The transmission device provided in this embodiment is configured to achieve... Figure 4 The transmission method of the illustrated embodiment and the transmission device provided in this embodiment are similar in principle and technical effect, and will not be described again here.

[0224] In one embodiment, the configuration information of the second broadcast or multicast service includes at least one of the following: broadcast or multicast service system information; broadcast or multicast service transmission channel configuration information; broadcast or multicast service bearer configuration information; and broadcast or multicast service configuration information change notification.

[0225] In one embodiment, the transmission method applied to the fourth communication node further includes: assembling and encoding configuration information of the first broadcast or multicast service and configuration information of the second broadcast or multicast service to generate a message of configuration information of the third broadcast or multicast service; and sending the message of configuration information of the third broadcast or multicast service to the third communication node.

[0226] Figure 17 This is a schematic diagram of the structure of a device provided in an embodiment of this application. For example... Figure 17 As shown, the device provided in this application includes: a processor 1510, a memory 1520, and a communication module 1530. The device may contain one or more processors 1510. Figure 17 Taking a processor 1510 as an example, the number of memory units 1520 in this device can be one or more. Figure 17 Taking a memory 1520 as an example, the processor 1510, memory 1520, and communication module 1530 of this device can be connected via a bus or other means. Figure 17 Taking a bus connection as an example, in this embodiment, the device is the first communication node. For example, the first communication node can be a UE (User Equipment).

[0227] The memory 1520, as a computer-readable storage medium, can be configured to store software programs, computer-executable programs, and modules, such as program instructions / modules corresponding to the device in any embodiment of this application (e.g., a first receiver and a second receiver in a transmission device). The memory 1520 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function, and the data storage area may store data created based on the use of the device. Furthermore, the memory 1520 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some instances, the memory 1520 may further include memory remotely located relative to the processor 1510, and these remote memories can be connected to the device via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0228] The communication module 1530 is configured to perform communication interaction between a first communication node, a second communication node, a third communication node, or a fourth communication node.

[0229] The device provided above can be configured to execute the transmission method applied to the first communication node provided in any of the above embodiments, and has the corresponding functions and effects.

[0230] When the device is a second communication node, the device provided above can be configured to execute the transmission method for the second communication node provided in any of the above embodiments, and has the corresponding functions and effects.

[0231] When the device is a third communication node, the device provided above can be configured to execute the transmission method for the third communication node provided in any of the above embodiments, and has the corresponding functions and effects.

[0232] When the device is the fourth communication node, the device provided above can be configured to execute the transmission method for the fourth communication node provided in any of the above embodiments, and has the corresponding functions and effects.

[0233] This application embodiment also provides a storage medium containing computer-executable instructions, which, when executed by a computer processor, are used to execute a transmission method applied to a first communication node. The method includes: receiving configuration information of a broadcast or multicast service from a second communication node; and receiving broadcast or multicast service data according to the configuration information of the broadcast or multicast service.

[0234] This application also provides a storage medium containing computer-executable instructions, which, when executed by a computer processor, are used to perform a transmission method applied to a second communication node. The method includes sending configuration information for a broadcast or multicast service to a first communication node.

[0235] This application embodiment also provides a storage medium containing computer-executable instructions, which, when executed by a computer processor, are used to execute a transmission method applied to a third communication node. The method includes: generating configuration information for a first broadcast or multicast service; and sending a message carrying the configuration information for the first broadcast or multicast service to a fourth communication node.

[0236] This application also provides a storage medium containing computer-executable instructions, which, when executed by a computer processor, are used to perform a transmission method applied to a fourth communication node. The method includes: receiving configuration information of a first broadcast or multicast service sent by a third communication node; and generating configuration information of a second broadcast or multicast service.

[0237] Those skilled in the art will understand that the term user equipment covers any suitable type of wireless user equipment, such as mobile phones, portable data processing devices, portable web browsers, or vehicle-mounted mobile stations.

[0238] Generally, the various embodiments of this application can be implemented in hardware or dedicated circuitry, software, logic, or any combination thereof. For example, some aspects can be implemented in hardware, while others can be implemented in firmware or software that can be executed by a controller, microprocessor, or other computing device, although this application is not limited thereto.

[0239] Embodiments of this application can be implemented by executing computer program instructions through the data processor of a mobile device, for example, in a processor entity, or through hardware, or through a combination of software and hardware. The computer program instructions can be assembly instructions, Instruction Set Architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, status setting data, or source code or object code written in any combination of one or more programming languages.

[0240] Any block diagram of logical flow in the accompanying drawings of this application may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions. The computer program may be stored on memory. Memory may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as, but not limited to, read-only memory (ROM), random access memory (RAM), optical storage devices and systems (Digital Video Disc (DVD) or Compact Disk (CD)), etc. Computer-readable media may include non-transitory storage media. The data processor may be of any type suitable to the local technical environment, such as, but not limited to, general-purpose computers, special-purpose computers, microprocessors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), and processors based on multi-core processor architectures.

Claims

1. A transmission method, characterized in that, Applied to user equipment, including: Receive configuration information for broadcast or multicast services from the base station or base station distributed unit; Receive broadcast or multicast service data according to the configuration information of the broadcast or multicast service; The configuration information for the broadcast or multicast service includes: configuration information for the broadcast or multicast service control channel and bearer configuration information for the broadcast or multicast service; The configuration information of the broadcast or multicast service control channel includes the bandwidth portion identifier of the broadcast or multicast service control channel; the bearer configuration information of the broadcast or multicast service includes the air interface transmission mode indication of the broadcast or multicast service, which includes: unicast transmission indication, or multicast transmission indication.

2. The method according to claim 1, characterized in that, The configuration information for the broadcast or multicast service also includes at least one of the following: Information about broadcast or multicast service systems; configuration information for broadcast or multicast service transmission channels.

3. The method according to claim 2, characterized in that, The broadcast or multicast service system information includes at least one of the following: List of service areas supported on the current frequency; list of service areas supported on adjacent frequency points; downlink frequency points of adjacent carrier frequencies; identification information for broadcast or multicast services.

4. The method according to any one of claims 2-3, characterized in that, When the configuration information for the broadcast or multicast service includes broadcast or multicast service system information, receiving the configuration information for the broadcast or multicast service from the base station or base station distributed unit includes: Receive broadcast or multicast service information via system messages or dedicated radio resource control RRC messages.

5. The method according to claim 1, characterized in that, The configuration information of the broadcast or multicast service control channel also includes at least one of the following: Identification information of broadcast or multicast services; repetition period of broadcast or multicast service control channels; offset of broadcast or multicast service control channels; start time slot of broadcast or multicast service control channels; duration of broadcast or multicast service control channels; modification period of broadcast or multicast service control channels.

6. The method according to claim 1 or 5, characterized in that, When the configuration information for the broadcast or multicast service includes configuration information for the broadcast or multicast service control channel, receiving the configuration information for the broadcast or multicast service from the base station or base station distributed unit includes: Receive configuration information for broadcast or multicast service control channels via system messages or dedicated RRC messages.

7. The method according to claim 2, characterized in that, The configuration information of the broadcast or multicast service transmission channel includes at least one of the following: Identification information for broadcast or multicast services; radio interface identification information for broadcast or multicast services; service area identification information for broadcast or multicast services; neighbor cell list; broadcast or multicast service transmission channel scheduling configuration information.

8. The method according to claim 7, characterized in that, The broadcast or multicast service transmission channel scheduling configuration information includes: The persistence timer for the broadcast or multicast service transmission channel; the discontinuous reception DRX-related timer for the broadcast or multicast service transmission channel; the scheduling period for the broadcast or multicast service transmission channel; the scheduling offset for the broadcast or multicast service transmission channel; and the bandwidth portion identifier for the broadcast or multicast service transmission channel.

9. The method according to claim 2, 7 or 8, characterized in that, When the configuration information for the broadcast or multicast service includes configuration information for the broadcast or multicast service transmission channel, receiving the configuration information for the broadcast or multicast service from the base station or base station distributed unit includes: Configuration information for broadcast or multicast service transmission channels is received via system messages, RRC messages transmitted on broadcast or multicast service control channels, or dedicated RRC messages.

10. The method according to claim 1, characterized in that, The bearer configuration information for the broadcast or multicast service also includes at least one of the following: Identification information for broadcast or multicast services; radio interface identification information for broadcast or multicast services; service area identification information for broadcast or multicast services; neighbor cell list; configuration information for radio bearers of broadcast or multicast services.

11. The method according to claim 10, characterized in that, The configuration information of the air interface radio bearer for the broadcast or multicast service includes at least one of the following: Identification information of the air interface radio bearer for broadcast or multicast services; sequence number length of the Packet Data Convergence Protocol (PDCP) layer; maximum context identifier; reordering timer; sequence number length of the Radio Link Control Protocol (RLC) layer; reassembly timer.

12. The method according to claim 1, 10, or 11, characterized in that, When the configuration information of the broadcast or multicast service includes the bearer configuration information of the broadcast or multicast service, receiving the configuration information of the broadcast or multicast service from the base station or base station distributed unit includes: The bearer configuration information of broadcast or multicast services is received through system messages, RRC messages transmitted on the broadcast or multicast service control channel, or dedicated RRC messages. Alternatively, the default configuration information can be used to carry broadcast or multicast services.

13. A transmission method, characterized in that, Applied to base stations or base station distributed units, including: Send configuration information for broadcast or multicast services to user equipment so that the user equipment can receive broadcast or multicast service data according to the configuration information for broadcast or multicast services; The configuration information for the broadcast or multicast service includes: configuration information for the broadcast or multicast service control channel and bearer configuration information for the broadcast or multicast service; The configuration information of the broadcast or multicast service control channel includes the bandwidth portion identifier of the broadcast or multicast service control channel; the bearer configuration information of the broadcast or multicast service includes the air interface transmission mode indication of the broadcast or multicast service, which includes: unicast transmission indication, or multicast transmission indication.

14. The method according to claim 13, characterized in that, The configuration information for the broadcast or multicast service also includes at least one of the following: Information about broadcast or multicast service systems; configuration information for broadcast or multicast service transmission channels.

15. A communication device, characterized in that, include: A communication module, a memory, and one or more processors; The communication module is configured to perform communication interaction between user equipment, base station or base station distributed unit, distributed unit (DU) or centralized unit (CU); The memory is configured to store one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the method as described in any one of claims 1-12 or 13-14.

16. A storage medium, characterized in that, The storage medium stores a computer program that, when executed by a processor, implements the method described in any one of claims 1-12 or 13-14.

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