CN115835143B - Method and base station for transmitting multicast broadcast service - Google Patents
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The application provides a method and a base station for sending multicast broadcast service. The method comprises the following steps: broadcasting configuration information of a multicast control channel on a downlink initial bandwidth part, and transmitting the multicast control channel on the downlink initial bandwidth part; determining a bandwidth part to be allocated in at least one bandwidth part according to service quality information of the multicast broadcasting service and the bandwidth size of a downlink initial bandwidth part, transmitting a session of the multicast broadcasting service on the determined bandwidth part, and transmitting configuration information of the session of the multicast broadcasting service on a multicast control channel transmitted on the downlink initial bandwidth part; after receiving the information of joining the multicast broadcast service from the user equipment, determining the bandwidth part of the session for transmitting the multicast broadcast service according to the state before joining the multicast broadcast service from the user equipment. By the technical scheme, broadband resources can be saved.
Description
Technical Field
The present application relates to radio resource allocation technologies, and in particular, to a method and a base station for transmitting a multicast broadcast service.
Background
With the continuous development of wireless communication technology, a New Radio Access NR (NR) system has been proposed and used. In order to provide MBS (Multicast and Broadcast Service: multicast broadcast service, abbreviated MBS) in NR system, R17 WI (Release 17Work Item: release 17Work Item, abbreviated R17 WI) was set up at 3GPP (The 3rd Generation Partnership Project: third generation partnership project, abbreviated 3 GPP) RAN (Radio Access Network: radio access network, abbreviated RAN) in The 2019, 12: NR MBS. In the NR MBS, a method of determining to provide a multicast service and a broadcast service in the NR system is required.
The architecture of MBS in NR system is composed of MBS server, 5GC (5G Core Network:5G core network, abbreviated as 5 GC), NG-RAN (Next Generation RAN: next generation RAN) and UE (User Equipment, abbreviated as UE).
The MBS server provides MBS. For each MBS, the MBS server transmits the user plane data and the control plane information of the service to the 5GC through the user plane interface and the control plane interface between the MBS server and the 5GC respectively.
The 5GC provides a user plane data transmission path and a control plane information transmission path for the MBS from the MBS server, and transmits the user plane data and the control plane information of the MBS to the NG-RAN through the two paths respectively. The NG-RAN is a 5G base station and may be denoted as gNB.
The gNB determines a cell for transmitting the MBS according to the control plane information of the MBS from the 5GC, and transmits the MBS in the corresponding cell.
For the NR system, considering the UE power saving and capability issues, the UE can only support a partial bandwidth BWP, and thus, it is specified in the NR system that the base station configures the UE with a maximum of 4 BWP, but only one BWP can be activated at the same time, and the traffic of the UE is transmitted on the activated BWP. For an MBS, since the active BWP of each UE in a group of UEs receiving the service is different, in order for all UEs to be able to receive the service, the base station must transmit the service on the active BWP of each UE. This will result in a waste of NR air interface resources.
Therefore, there is a need for a method for sending multicast service, which can save broadband resources.
Disclosure of Invention
The application provides a method and a base station for sending a multicast broadcast service, which can save broadband resources and ensure timeliness of sending the multicast service.
In a first aspect, the present application provides a method for transmitting a multicast broadcast service, the method comprising:
the base station broadcasts configuration information of a multicast control channel on a downlink initial bandwidth part and transmits the multicast control channel on the downlink initial bandwidth part, wherein the configuration information of the multicast control channel is broadcast through a system information block special for the multicast control channel;
For a multicast broadcast service, a base station determines a bandwidth part to be allocated in at least one bandwidth part according to service quality information of the multicast broadcast service and bandwidth size of the downlink initial bandwidth part, transmits a session of the multicast broadcast service on the determined bandwidth part, and transmits configuration information of the session of the multicast broadcast service on the multicast control channel transmitted on the downlink initial bandwidth part;
after receiving the information of joining the multicast broadcast service by the user equipment, the base station determines a bandwidth part of a session for sending the multicast broadcast service to be used for transmitting the session of the multicast broadcast service to the user equipment according to the state before joining the multicast broadcast service by the user equipment.
In a second aspect, the present application provides a base station comprising: a memory, a processor;
the memory is used for storing the processor executable instructions;
the processor is configured to perform the method of any of the first aspects.
In a third aspect, the present application provides a computer-readable storage medium having stored therein computer-executable instructions for performing the method of any of the first aspects when executed by a processor.
In a fourth aspect, the application provides a computer program product comprising a computer program which, when executed by a processor, implements the method of any of the first aspects.
The application provides a method and a base station for sending a multicast broadcast service, wherein the base station broadcasts configuration information of a multicast control channel on a downlink initial bandwidth part and sends the multicast control channel on the downlink initial bandwidth part, and the configuration information of the multicast control channel is broadcast through a system information block special for the multicast control channel; for a multicast broadcast service, a base station determines a bandwidth part to be allocated in at least one bandwidth part according to service quality information of the multicast broadcast service and bandwidth size of the downlink initial bandwidth part, transmits a session of the multicast broadcast service on the determined bandwidth part, and transmits configuration information of the session of the multicast broadcast service on the multicast control channel transmitted on the downlink initial bandwidth part; after receiving the information of joining the multicast broadcast service by the user equipment, the base station determines a bandwidth part of a session for sending the multicast broadcast service to be used for transmitting the session of the multicast broadcast service to the user equipment according to the state before joining the multicast broadcast service by the user equipment. By the technical scheme, broadband resources can be saved and timeliness of multicast and broadcast service transmission can be guaranteed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
FIG. 1 is a block diagram of a system according to a first embodiment of the present application;
Fig. 2 is a flowchart of a method for transmitting a multicast broadcast service according to a first embodiment of the present application;
fig. 3 is a schematic diagram of functions/flows to be implemented by a base station according to a second embodiment of the present application.
Specific embodiments of the present application have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the application. Rather, they are merely examples of apparatus and methods consistent with aspects of the application as detailed in the accompanying claims.
The specific application scenario of the application is to provide multicast broadcast service in a 5G new wireless access system. Specifically, the system includes a server, a core network, a base station and a user equipment, wherein the connection relationship between the above four may be referred to the architecture diagram of a system shown in fig. 1.
The application provides a method for sending multicast broadcast service, which aims to solve the technical problems in the prior art.
The following describes the technical scheme of the present application and how the technical scheme of the present application solves the above technical problems in detail with specific embodiments. The following embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.
Fig. 2 is a flowchart of a method for transmitting a multicast broadcast service according to a first embodiment of the present application. The first embodiment comprises the following steps:
s201, user Equipment (UE) supporting Multicast Broadcast Service (MBS) reports the multicast broadcast service capability to a base station (gNB).
In this embodiment, the UE may perform UE capability information interaction with the base station, and, by way of example, the UE may report the multicast broadcast service capability to the base station, so as to implement transmission of the multicast broadcast service between the base station and the UE.
S202, the base station supporting the multicast broadcast service broadcasts the configuration information of the multicast control channel MCCH on the downlink initial bandwidth part, and sends the multicast control channel MCCH on the downlink initial bandwidth part. The configuration information of the multicast control channel MCCH is broadcast through an MCCH special SIB.
In this embodiment, specifically, to provide a multicast broadcast service in a cell, a new control channel is introduced: and the multicast control channel MCCH is used for bearing the configuration information of the session of the multicast broadcast service sent in a point-to-multipoint PTM mode in the cell, and the user equipment can receive the session of the multicast broadcast service according to the configuration information of the session of the multicast broadcast service. For the transmission of the multicast control channel MCCH, its transmission on the downlink initial bandwidth portion is mandatory, while the transmission on the respective downlink dedicated bandwidth portion is optional.
Further, the user equipment in the radio resource control IDLE state rrc_idle/radio resource control INACTIVE state rrc_inactive may receive the multicast control channel directly on the downlink initial bandwidth portion. For the UE in the radio resource control CONNECTED state rrc_connected, when the activated downlink dedicated bandwidth portion of the UE overlaps with the downlink initial bandwidth portion and the search space for transmitting the scheduling information of the multicast control channel MCCH is located in the overlapping portion, the UE may directly receive the multicast control channel MCCH on the downlink dedicated bandwidth portion.
Specifically, the user equipment receives configuration information of a multicast control channel through an SIB dedicated for MCCH, then receives a PDCCH dedicated for the multicast control channel MCCH in a search space corresponding to the multicast control channel MCCH according to the configuration information, and receives a PDSCH dedicated for the multicast control channel according to a DCI format of the PDCCH uplink and downlink control information. The search space is a common search space. And the CRC of the PDCCH special for the multicast control channel MCCH is scrambled by MCCH-RNTI, the DCI format on the PDCCH is the dynamic scheduling information of the multicast control channel MCCH, and the MCCH-RNTI is used for marking the multicast control channel on an air interface. The PDSCH dedicated for the multicast control channel MCCH adopts MCCH-RNTI when bit scrambling, and the PDSCH is used for transmitting the multicast control channel MCCH, namely: the PDSCH is used to transmit configuration information carried on the multicast control channel MCCH).
S203, when the server initiates a multicast broadcast service, the server sends a multicast broadcast service establishment request message to the core network to trigger the core network to configure resources for the session of the multicast broadcast service for sending the session of the multicast broadcast service to the base station, and the core network sends the multicast broadcast service establishment request message to the base station to trigger the base station to configure wireless resources for the session of the multicast broadcast service for sending the session of the multicast broadcast service on an air interface, wherein the message contains service quality information of the multicast broadcast service. And the base station selects one bandwidth part from the downlink initial bandwidth part and each downlink special bandwidth part to send the session of the multicast broadcast service according to the service quality QOS information of the multicast broadcast service and the bandwidth size of the downlink initial bandwidth part.
In this embodiment, a server initiates a request for establishing a session of a multicast broadcast service to a core network, and the core network configures corresponding resources for a session of a corresponding multicast broadcast service according to the request of the server, for sending the corresponding session to a base station. The core network also needs to inform the base station to configure radio resources for the session of the multicast broadcast service in the corresponding cell, so as to send the session of the multicast broadcast service in the corresponding cell. And the base station selects the downlink initial bandwidth part and each downlink special bandwidth part according to the QoS (quality of service) information of the multicast broadcast service and the bandwidth size of the downlink initial bandwidth part, and transmits the session of the multicast broadcast service on the selected bandwidth part.
Specifically, the specific procedure of the base station transmitting the session of the multicast broadcast service on a downlink bandwidth portion BWP is as follows:
The base station maps the quality of service QOS flows of the session of the multicast broadcast service onto 1 or more multicast broadcast radio bearers MRBs. A new traffic channel is introduced: multicast broadcast traffic channels. The data on each MRB is sent to the MAC layer through one dedicated MTCH by the processing of the PDCP entity and the RLC entity. The MAC layer schedules each MTCH of a session of one multicast broadcast service: for the MTCH corresponding to the MRB adopting dynamic scheduling, the MAC layer supports multiplexing of the MTCH during scheduling; for the MTCH corresponding to the MRB adopting semi-static scheduling, the MAC layer may schedule each MTCH separately during scheduling, or may support multiplexing of multiple MTCHs.
When the multicast broadcast radio bearer MRB adopting dynamic scheduling/semi-static scheduling exists in the session of the multicast broadcast service, the base station allocates a group-radio physical temporary identifier G-RNTI/group-configured authorization-radio physical temporary identifier G-CS-RNTI to the session of the multicast broadcast service. The G-RNTI/G-CS-RNTI is used for identifying the session of the multicast broadcast service on an air interface.
The CRC of the dedicated PDCCH of the session of the multicast broadcast service is scrambled by the G-RNTI/G-CS-RNTI, and the PDCCH is used for transmitting the dynamic scheduling information/the activation and deactivation information of the semi-static resources of the session of the multicast broadcast service. The special PDSCH of the session of the multicast broadcast service adopts G-RNTI/G-CS-RNTI when bit scrambling, and the PDSCH is used for transmitting data on MRB adopting dynamic scheduling/semi-static scheduling in the session of the multicast broadcast service.
S204, the base station firstly transmits the configuration information of the session of the multicast broadcast service on a multicast control channel MCCH transmitted on a downlink initial bandwidth part; and then the base station traverses other downlink special bandwidth parts, and if the user equipment on each other downlink special bandwidth part has multicast broadcasting service capability, the base station transmits a multicast control channel MCCH on the bandwidth part so that the user equipment knows the session of each multicast broadcasting service broadcasted in the cell and selects the session of the interested multicast broadcasting service from the session for receiving.
In this embodiment, the base station traverses other downlink bandwidth portions, and determines whether other downlink bandwidth portions have user equipment with multicast broadcast service capability, and if so, sends a multicast control channel on the corresponding downlink bandwidth portion, so that the user equipment on the corresponding downlink bandwidth portion knows the session of each multicast broadcast service broadcasted by the cell.
S205, when the user equipment joins a certain multicast broadcast service, if the user equipment is in a wireless resource control idle state/a wireless resource control inactive state at the moment, a request for establishing wireless resource control connection is initiated, and a message for joining the multicast broadcast service is sent; if the user equipment is in the radio resource control connection state, directly sending the message joining the multicast broadcast service.
In this embodiment, if the ue is in an idle/inactive state of radio resource control, a request for establishing a radio resource control connection is initiated, and after the radio resource control connection is established, a message for joining the multicast broadcast service is sent, so as to join the multicast broadcast service. If the user equipment is in the radio resource control connection state, the message joining the multicast broadcast service can be directly sent, and then the multicast broadcast service is joined.
S206, the base station transmits the message of joining the multicast broadcasting service to the core network, when the base station receives the message of joining the multicast broadcasting service from the core network, if the user equipment joins from the idle state of the radio resource control/the inactive state of the radio resource control, the base station distributes the downlink bandwidth part of the session which has transmitted the multicast broadcasting service to the user equipment as the active downlink bandwidth part of the user equipment, and the user equipment directly receives the session of the multicast broadcasting service on the active downlink bandwidth part; if the user equipment is in a radio resource control connection state and the currently activated downlink bandwidth part does not have a session for transmitting the multicast broadcast service, the base station firstly judges whether to switch the user equipment to a dedicated downlink bandwidth part for transmitting the session of the multicast broadcast service according to a certain rule, if the base station decides to still keep the user equipment on the original downlink bandwidth part, the base station transmits the session of the multicast broadcast service on the bandwidth part, otherwise, the base station switches the user equipment to a dedicated downlink bandwidth part for transmitting the session of the multicast broadcast service and transmits a unicast session of the user equipment on the switched dedicated downlink bandwidth part.
In this embodiment, the message sent by the ue to join the multicast broadcast service is a higher layer message, and the base station does not process the message, and the message is forwarded by the base station to the core network. And the core network carries out related processing on the message and sends the information of joining the multicast broadcast service to the base station, so that the base station distributes wireless resources for the user equipment to send the session of the multicast broadcast service to the user equipment according to the information.
When the base station receives the information of joining the multicast broadcast service from the core network, different processes are performed according to different states of the user equipment, specifically, if the user equipment joins through a radio resource control idle state/a radio resource control inactive state, a downlink bandwidth part of a session for transmitting the multicast broadcast service can be directly allocated to the user equipment as an activated downlink bandwidth part, so that the user equipment can receive the session of the multicast broadcast service on the activated downlink bandwidth part.
If the user equipment is in a radio resource control connection state and the currently activated downlink bandwidth part does not have a session for transmitting the multicast broadcast service, the base station firstly judges whether to switch the user equipment to the downlink dedicated bandwidth part of the session for transmitting the multicast broadcast service according to a certain rule, and if the certain rule is met, the base station switches the user equipment to the downlink dedicated bandwidth part of the session for transmitting the multicast broadcast service. If the certain rule is not satisfied, the base station transmits the session of the multicast broadcast service on the activated downlink bandwidth portion of the user equipment.
S207, when the user equipment leaves the multicast broadcasting service, sending a message leaving the multicast broadcasting service, and the base station sends the message of the user equipment leaving the multicast broadcasting service to the core network, when the base station receives the message of the user equipment leaving the multicast broadcasting service from the core network, determining whether the user equipment is the last user equipment receiving the multicast broadcasting service on the downlink bandwidth part, and if so, stopping the session of sending the multicast broadcasting service on the downlink bandwidth part by the base station.
In this embodiment, the message sent by the ue leaving the multicast broadcast service is a higher layer message, and the base station does not process the message, and the message is forwarded by the base station to the core network. The core network carries out relevant processing on the message and sends information that the user equipment leaves the multicast broadcast service to the base station so that the base station can execute the following processing according to the information:
If the user equipment is the last user equipment receiving the session of the multicast broadcast service in the downlink bandwidth part, the base station stops sending the session of the multicast broadcast service on the downlink bandwidth part.
The application provides a method for transmitting multicast broadcast service, specifically, a base station executes the following processes:
Broadcasting configuration information of a multicast control channel MCCH on an initial downlink bandwidth part, and transmitting the multicast control channel MCCH on the downlink initial bandwidth part; establishing a multicast broadcast service, determining a downlink bandwidth part to be allocated in at least one downlink bandwidth part according to the service quality QOS information of the multicast broadcast service and the size of the downlink initial bandwidth part, and transmitting a session of the multicast broadcast service on the determined downlink bandwidth part; after receiving the information that the user equipment joins the multicast broadcast service, determining a downlink bandwidth part for transmitting the session of the multicast broadcast service to the user equipment according to the relationship between the user equipment and each downlink bandwidth part and the state of each downlink bandwidth part (for example, whether to transmit the session of the multicast broadcast service), and transmitting the session of the multicast broadcast service to the user equipment through the determined downlink bandwidth part. By the technical scheme, broadband resources can be saved and timeliness of multicast and broadcast service transmission can be guaranteed.
In a method for sending a multicast broadcast service provided in the first embodiment of the present application, four network elements/devices are involved: base station, user equipment UE, server and core network.
Next, a base station is provided according to a second embodiment of the present application, which is configured to implement a method for sending a multicast broadcast service according to the first embodiment of the present application.
Fig. 3 is a schematic diagram of functions and flow to be implemented by a base station according to a second embodiment of the present application. Specifically, the base station sequentially realizes the following functions:
s301, the base station receives the information supporting the multicast broadcast service capability reported by the user equipment.
S302, the base station broadcasts configuration information of a multicast control channel MCCH on a downlink initial bandwidth part, and sends the multicast control channel MCCH on the downlink initial bandwidth part.
S303, for a broadcast multicast service, after receiving a 'multicast broadcast service establishment request message' sent by a core network, a base station selects a bandwidth part from a downlink initial bandwidth part and each downlink dedicated bandwidth part to send a session of the multicast broadcast service according to service quality QOS information of the multicast broadcast service and the bandwidth size of the downlink initial bandwidth part.
S304, the base station firstly transmits the configuration information of the session of the multicast broadcast service on a multicast control channel MCCH transmitted on a downlink initial bandwidth part; and then the base station traverses other downlink special bandwidth parts, and if the user equipment on each other downlink special bandwidth part has multicast broadcasting service capability, the base station transmits a multicast control channel MCCH on the bandwidth part so that the user equipment knows the session of each multicast broadcasting service broadcasted in the cell and selects the session of the interested multicast broadcasting service from the session for receiving.
S305, the base station executes the following processing according to the information of the user equipment joining the multicast broadcast service:
if the user equipment joins the multicast broadcast service from the idle state of radio resource control/the inactive state of radio resource control, the base station allocates the downlink bandwidth part of the session which has sent the multicast broadcast service to the user equipment as the active downlink bandwidth part of the user equipment, and the user equipment directly receives the session of the multicast broadcast service on the active downlink bandwidth part; if the user equipment is in a radio resource control connection state and the currently activated downlink bandwidth part does not have a session for transmitting the multicast broadcast service, the base station firstly judges whether to switch the user equipment to the dedicated downlink bandwidth part of the session for transmitting the multicast broadcast service according to a certain rule, and if the base station decides to still keep the user equipment on the original downlink bandwidth part, the base station transmits the session for the multicast broadcast service on the bandwidth part.
S306, the base station judges whether the user equipment is the last user equipment receiving the multicast broadcast service on the downlink bandwidth part according to the information that the user equipment leaves the multicast broadcast service, if so, the base station stops the session of transmitting the multicast broadcast service on the downlink bandwidth part.
It will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the base station described above may refer to the corresponding process in the foregoing method embodiment, which is not repeated herein.
Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (7)
1. A method of multicast broadcast service transmission, the method comprising:
the base station broadcasts configuration information of a multicast control channel on a downlink initial bandwidth part and transmits the multicast control channel on the downlink initial bandwidth part, wherein the configuration information of the multicast control channel is broadcast through a system information block special for the multicast control channel;
For a multicast broadcast service, a base station determines a bandwidth part to be allocated in at least one bandwidth part according to service quality information of the multicast broadcast service and bandwidth size of the downlink initial bandwidth part, transmits a session of the multicast broadcast service on the determined bandwidth part, and traverses each downlink dedicated bandwidth part while transmitting configuration information of the session of the multicast broadcast service on the multicast control channel transmitted on the downlink initial bandwidth part, and if user equipment on the downlink dedicated bandwidth part has multicast broadcast service capability, transmits the multicast control channel on the downlink dedicated bandwidth part;
after receiving the information of the user equipment joining the multicast broadcast service, the base station determines a bandwidth part of a session for transmitting the multicast broadcast service to the user equipment according to the state before the user equipment joining the multicast broadcast service;
after receiving the information that the user equipment joins the multicast broadcast service, the base station determines, according to a state before the user equipment joins the multicast broadcast service, that a bandwidth portion of a session for transmitting the multicast broadcast service is used to transmit the session of the multicast broadcast service to the user equipment, including:
If the user equipment joins the multicast broadcast service from the idle state of radio resource control/the inactive state of radio resource control, the downlink bandwidth part of the session which has sent the multicast broadcast service is allocated to the user equipment as the active downlink bandwidth part of the user equipment, and the user equipment receives the session of the multicast broadcast service on the active downlink bandwidth part;
if the user equipment joins the multicast broadcast service from the radio resource control connection state and the currently activated downlink bandwidth part does not have a session for transmitting the multicast broadcast service, transmitting the session for the multicast broadcast service on the activated downlink bandwidth part;
If the user equipment joins the multicast broadcast service from the radio resource control connection state and the currently activated downlink bandwidth part does not have the session for transmitting the multicast broadcast service, switching the user equipment to the downlink bandwidth part of the session for transmitting the multicast broadcast service, and transmitting the unicast session of the user equipment on the switched downlink bandwidth part.
2. The method according to claim 1, characterized in that the method comprises:
the user equipment with multicast and broadcast service capability reports the multicast and broadcast service capability to the base station.
3. The method of claim 1, wherein for a multicast broadcast service, the base station determines a bandwidth portion to be allocated in at least one bandwidth portion based on the quality of service information of the multicast broadcast service and the bandwidth size of the downlink initial bandwidth portion, transmits a session of the multicast broadcast service on the determined bandwidth portion, and prior to transmitting configuration information of the session of the multicast broadcast service on the multicast control channel transmitted on the downlink initial bandwidth portion, the method further comprises:
and the base station receives a multicast broadcast service establishment request message sent by the core network, wherein the message comprises service quality information of the multicast broadcast service.
4. The method according to claim 1, characterized in that the method comprises:
When the user equipment joins the multicast broadcast service, if the user equipment is in a radio resource control idle state/a radio resource control inactive state, initiating a request for establishing radio resource control connection, and sending a message for joining the multicast broadcast service so as to join the multicast broadcast service;
if the user equipment is in a radio resource control connection state, sending a message of joining a multicast broadcast service to join the multicast broadcast service;
And the base station transmits the message of joining the multicast broadcasting service, which is transmitted by the user equipment, to a core network and receives the information of joining the multicast broadcasting service, which is transmitted by the core network, of the user equipment.
5. The method according to claim 1, wherein the method further comprises:
if the base station receives the information that the user equipment leaves the multicast broadcast service and the user equipment is the last user equipment which receives the multicast broadcast service on the downlink bandwidth part, stopping sending the session of the multicast broadcast service on the bandwidth part.
6. The method according to claim 1, characterized in that the method comprises:
the session of the multicast broadcast service is provided with unique identification information for identifying the session of the multicast broadcast service on an air interface.
7. A base station, comprising: a memory, a processor;
the memory is used for storing instructions executable by the processor;
the processor is configured to perform the method of any one of claims 1 to 6.
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| US11638270B2 (en) * | 2020-02-10 | 2023-04-25 | Qualcomm Incorporated | Techniques for configuring search spaces in multicast/broadcast service (MBS) wireless communications |
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| WO2021159466A1 (en) * | 2020-02-14 | 2021-08-19 | Mediatek Singapore Pte. Ltd. | Methods and apparatus of group scheduling for nr multicast service |
| CN113347577B (en) * | 2020-03-03 | 2022-05-27 | 大唐移动通信设备有限公司 | Method, device and storage medium for receiving notification of MBMS (multimedia broadcast multicast service) |
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