CN113099391B

CN113099391B - Method and system for independently deployed 5G system to bear MBMS

Info

Publication number: CN113099391B
Application number: CN202010021656.7A
Authority: CN
Inventors: 魏立梅; 袁乃华; 陈迎; 范晨
Original assignee: Chengdu TD Tech Ltd
Current assignee: Chengdu TD Tech Ltd
Priority date: 2020-01-09
Filing date: 2020-01-09
Publication date: 2022-06-24
Anticipated expiration: 2040-01-09
Also published as: CN113099391A

Abstract

The embodiment of the invention provides a method and a system for bearing an MBMS (multimedia broadcast multicast service) by an independently deployed 5G system. The MBMS entity receives the MBMS request from the server, determines a cell which needs to broadcast the MBMS and belongs to the gNB, a broadcast mode of broadcasting the MBMS in the cell belonging to the gNB and MBMS configuration information corresponding to the broadcast mode; the gNB receives MBMS configuration information from the MBMS entity and receives MBMS data from the MBMS entity based on the MBMS configuration information; based on the broadcast mode, the gNB broadcasts the MBMS data in the cell belonging to the gNB. The embodiment of the invention realizes the functions of BM-SC, MBMS-GW, MME, MCE and the like in an LTE system by adding a logic network element, and effectively compresses the time delay of MBMS bearer establishment.

Description

Method and system for independently deployed 5G system to bear MBMS

Technical Field

The present invention belongs to the technical field of mobile communication, and particularly relates to a method and a system for an independently deployed 5G system to carry Multimedia Broadcast Multicast Service (MBMS).

Background

MBMS is a typical service supported by the LTE system in 3GPP protocol, and the service can be transmitted to a specific User Equipment (UE) through a unicast Bearer, and can also be broadcast in a cell through an MBMS Bearer (MBMS Bearer). Fig. 1 is an architecture diagram of MBMS in LTE system in 3GPP protocol. The PLMN is a home PLMN (H-PLMN) when the UE is in a non-roaming scenario; when the UE is in a roaming scenario, the PLMN is a visited PLMN (V-PLMN). The E-UTRAN consists of a multi-cell Multicast Coordination Entity (MCE) and an evolved base station (eNB).

Taking fig. 1 as an example, the procedure of broadcasting MBMS by MBMS bearer is as follows:

a Group communication system application server (GCS AS) in an application domain sends an MBMS Bearer activation Request (active MBMS Bearer Request) to a BM-SC through an MB2-C interface, and the message carries a session attribute of the MBMS. The session attributes include: TMGI, QOS information, MBMS broadcast area and start time of MBMS, wherein the MBMS broadcast area is defined by an MBMS area ID list and/or a cell ID list. The message triggers BM-SC to initiate a session start request process, in which BM-SC triggers a corresponding network element to allocate resources for MBMS bearer.

Specifically, in the Session Start Request process, the BM-SC sends a Session Start Request (Session Start Request) to the MBMS-GW, where the message carries the Session attribute of the MBMS. MBMS-GW establishes MBMS bearing context for MBMS and distributes transmission network IP multicast address and C-TEID for the service. MBMS-GW sends session start request to corresponding MME, and the message carries session attribute. Newly adding: the TNL information. The information includes: the transport network IP multicast address, the C-TEID and the IP address of the multicast source. Before sending this message, the MBMS-GW feeds back a Session Start Response) to the BM-SC.

After receiving the Response, the BM-SC feeds back an Activate MBMS Bearer Response (Activate MBMS Bearer Response) to the GCS AS. The message carries the information of the IP address, the port number and the like of the BM-SC. The BM-SC is then ready to receive MBME traffic data from the GCS AS over the MB2-U interface.

After receiving the response of activating the MBMS bearer, the GCS AS prepares to send the MBMS data to the BM-SC through the MB2-U interface.

After receiving the MBMS conversation starting request, the MME establishes an MBMS bearing context for the MBMS according to the conversation attribute in the message, determines each MCE corresponding to the MBMS broadcast area in the conversation attribute, and sends the conversation starting request to each MCE. The message carries the session attributes.

The MCE establishes MBMS bearing context for the MBMS according to the session attribute of the MBMS in the message and determines the MBMS sending mode of each service area or cell corresponding to the MBMS broadcast area.

When the MCE determines that the service is broadcasted in an MBMS area or an area formed by a plurality of cells in an MBSFN mode, the MCE allocates radio resources to the MBMS.

The MCE sends a session start request to the corresponding eNB. The message carries the MBMS session attributes. The session attributes include: TMGI and TNL information. When the MCE determines to transmit the MBMS in the corresponding cell in an SC-PTM mode, the message also carries SC-PTM information, and the information comprises: QOS information of MBMS and a cell ID list, wherein the cell ID list is a set of cells which transmit MBMS in an SC-PTM mode in the cells belonging to the corresponding eNB.

After receiving the session start request, the eNB joins the corresponding IP multicast distribution through the M1 interface according to the TNL information in the session attributes, and prepares to receive the data of the MBMS from the MBMS-GW.

And when the message contains SC-PTM information, the eNB allocates wireless resources to the MBMS according to the QOS information of the MBMS in each cell corresponding to the cell ID list. In general, radio resources allocated to an MBMS by an eNB in different cells are not the same.

When the MCE determines that the service is broadcasted in the MBSFN manner in one MBMS area or an area formed by several cells, the MCE also sends MBMS Scheduling information (MBMS Scheduling information) to the corresponding eNB. The message includes MBSFN area configuration information. The eNB can determine the configuration information of the control plane resources and the user plane resources required by the MBMS transmission in the MBSFN mode according to the MBSFN area configuration information. And the eNB broadcasts the MBSFN area control information and the MBMS data in a corresponding cell through corresponding control plane resources and user plane resources.

After the MCE receives the session start request sent by the MME, the MCE feeds back a session start response to the MME before or during the processing performed by the MCE and the eNB.

And after receiving the response message fed back by the MCE, the MME feeds back a session start response to the MBMS-GW. The MBMS-GW starts IP multicast distribution of MBMS data after receiving the response.

After the above processing procedure, when the time of MBMS transmission is up, GCS AS sends MBMS data to BM-SC, BM-SC forwards the data to MBMS-GW, MBMS-GW sends the data to corresponding eNB in IP multicast distribution mode. In the MBSFN mode, the eNB broadcasts the data of the MBMS in a corresponding cell through the radio resources uniformly distributed by the MCE; in the SC-PTM mode, the eNB broadcasts the data of the MBMS in the corresponding cell through the radio resource allocated by the eNB.

With the widespread use of the LTE system, the era of wireless internet has been opened. Wireless internet has developed more diverse demands for wireless networks, including not only higher system throughput, but also lower transmission delay, higher reliability, and a greater number of connected users. To meet these demands, 5G systems have come into play. The evolution of the LTE system to the 5G system in the 3GPP protocol is divided into two phases: non-independently deployed 5G systems and independently deployed 5G systems. According to the evolution process of the core network, the non-independently deployed 5G system is divided into: 5G systems with enhanced EPC and 5G systems with 5 GC. Fig. 2 is a 5G system architecture diagram of an independent deployment scenario. In the scene, the gNB and the NG-eNB are respectively connected with the 5GC through NG interfaces, the gNB is interconnected through an Xn interface, the gNB is connected with the NG-eNB through an Xn interface, and the NG-eNB is interconnected through an Xn interface. In the above figure, when the UE has the NE-DC function, the UE can be provided with services through the gnbs and the ng-enbs at the same time, and when the UE has the NR-DC function, the UE can be provided with services through the two gnbs at the same time.

However, in the above independently deployed 5G system, how to provide MBMS by MBMS bearer through 5GC and gNB, there is no relevant method and system in the industry at present.

Disclosure of Invention

The embodiment of the invention provides a method and a system for bearing an MBMS by an independently deployed 5G system.

The technical scheme of the embodiment of the invention is as follows:

a method for bearing MBMS by independently deployed 5G system includes:

the MBMS entity receives an MBMS request from a server, and determines a cell which needs to broadcast the MBMS and belongs to a gNB, a broadcast mode of broadcasting the MBMS in the cell belonging to the gNB and MBMS configuration information corresponding to the broadcast mode;

the gNB receives the MBMS configuration information from an MBMS entity and receives MBMS data from the MBMS entity based on the MBMS configuration information;

and the gNB broadcasts the MBMS data in the cell belonging to the gNB based on the broadcasting mode.

In one embodiment, the broadcast mode includes at least one of: only a multimedia broadcast multicast single frequency network (MBSFN) mode is adopted; only single cell point-to-multipoint (SC-PTM) mode is adopted; adopting MBSFN mode or SC-PTM mode;

the SC-PTM mode comprises an SC-PTM mode of a mode 1 and an SC-PTM mode of a mode 2, wherein:

in the SC-PTM scheme of scheme 1: in a cell belonging to a gNB, an MBMS entity determines a cell ID list for broadcasting MBMS in an SC-PTM mode;

in the SC-PTM scheme of scheme 2: in a cell belonging to a gNB, an MBMS entity determines a cell ID list for broadcasting MBMS in an SC-PTM mode and distributes an NR parameter for the MBMS; the allocating, by the MBMS entity, the NR parameter for the MBMS includes: the MBMS entity allocates a unique group ID for the current MBMS and determines configuration information of a bandwidth part BWP broadcasting the MBMS, wherein the configuration information of BWP comprises: the time-frequency position, the subcarrier interval and the CP type of BWP broadcasting MBMS, the search space corresponding to a physical downlink control channel PDCCH dispatching MBMS and the configuration information of a control resource set.

In one embodiment, when the broadcast mode includes an MBSFN mode, the MBMS configuration information includes: a cell ID list for MBSFN broadcasting of MBMS in cells belonging to gNB; wireless resource configuration information uniformly allocated for the MBMS; session attributes of MBMS in an MBMS session start request;

when the broadcast mode includes the SC-PTM mode of the mode 1, the MBMS configuration information includes: a cell ID list for broadcasting MBMS in SC-PTM mode in the cell belonging to the gNB; session attributes of MBMS in an MBMS session start request;

when the broadcast mode comprises the SC-PTM mode of the mode 2, the MBMS configuration information comprises: a cell ID list for broadcasting MBMS in SC-PTM mode in the cell belonging to the gNB; session attributes of MBMS in an MBMS session start request; NR parameters allocated for MBMS, the NR parameters comprising: the MBMS entity is a unique group ID distributed to the MBMS; and the MBMS entity determines the configuration information of the BWP broadcasting the MBMS.

A method for bearing MBMS by independently deployed 5G system includes:

the MBMS entity receives an MBMS request from a server, determines MCEs corresponding to the MBMS request from an MCE set, and sends the MBMS request to the MCEs;

the MCE determines a cell which needs to broadcast the MBMS and belongs to a gNB, a broadcast mode of broadcasting the MBMS in the cell belonging to the gNB and MBMS configuration information corresponding to the broadcast mode;

the gNB receives the MBMS configuration information from the MCE and receives MBMS data from an MBMS entity based on the MBMS configuration information;

In one embodiment, the broadcast mode includes at least one of: only adopting MBSFN mode; only adopting SC-PTM mode; adopting MBSFN mode or SC-PTM mode;

in the SC-PTM scheme of scheme 1: in a cell belonging to a gNB, the MCE determines a cell ID list for broadcasting the MBMS in an SC-PTM mode;

in the SC-PTM scheme of scheme 2: in a cell belonging to a gNB, the MCE determines a cell ID list broadcasting MBMS in an SC-PTM mode and allocates NR parameters for the MBMS; the MCE allocating NR parameters for the MBMS comprises the following steps: the MCE allocates a unique group ID for the current MBMS and determines configuration information of a BWP broadcasting the MBMS, wherein the configuration information of the BWP comprises: the time-frequency position, the subcarrier interval and the CP type of the BWP broadcasting the MBMS, the search space corresponding to the PDCCH scheduling the MBMS and the configuration information of the control resource set.

In one embodiment, when the broadcast mode includes an MBSFN mode, the MBMS configuration information includes: a cell ID list for broadcasting MBMS in MBSFN in a cell belonging to the gNB; wireless resource configuration information uniformly allocated for the MBMS; session attributes of MBMS in an MBMS session start request;

when the broadcast mode includes the SC-PTM mode of mode 1, the MBMS configuration information includes: a cell ID list for broadcasting MBMS in SC-PTM mode in the cell belonging to the gNB; session attributes of MBMS in an MBMS session start request;

when the broadcast mode comprises the SC-PTM mode of the mode 2, the MBMS configuration information comprises: a cell ID list for broadcasting MBMS in SC-PTM mode in the cell belonging to the gNB; session attributes of MBMS in an MBMS session start request; NR parameters allocated for MBMS, the NR parameters comprising: the MBMS entity is a unique group ID distributed to the MBMS; configuration information of a BWP broadcasting the MBMS determined by the MBMS entity.

A method for bearing MBMS by independently deployed 5G system includes:

the MBMS entity receives an MBMS request from a server, transmits the MBMS request to an AMF disposed in the 5 GC;

the AMF determines an MCE corresponding to an MBMS request from an MCE set and sends the MBMS request to the MCE;

in the SC-PTM scheme of scheme 2: in a cell belonging to a gNB, the MCE determines a cell ID list for broadcasting MBMS in an SC-PTM mode and allocates an NR parameter for the MBMS; the MCE allocating NR parameters for the MBMS comprises the following steps: the MCE allocates a unique group ID for the current MBMS and determines configuration information of a BWP broadcasting the MBMS, wherein the configuration information of the BWP comprises: the time-frequency position, subcarrier interval and CP type of BWP broadcasting MBMS, the search space corresponding to PDCCH scheduling MBMS and the configuration information of control resource set.

when the broadcast mode includes the SC-PTM mode of mode 2, the MBMS configuration information includes: a cell ID list for broadcasting MBMS in SC-PTM mode in the cell belonging to the gNB; session attributes of MBMS in an MBMS session start request; NR parameters allocated for MBMS, the NR parameters comprising: the MBMS entity is a unique group ID distributed to the MBMS; configuration information of a BWP broadcasting the MBMS determined by the MBMS entity.

A system for bearing MBMS by an independently deployed 5G system comprises an MBMS entity and a gNB, wherein:

the MBMS entity is used for receiving the MBMS request from the server, determining a cell which needs to broadcast the MBMS and belongs to the gNB, a broadcast mode for broadcasting the MBMS in the cell belonging to the gNB and MBMS configuration information corresponding to the broadcast mode;

the gNB is used for receiving the MBMS configuration information from the MBMS entity and receiving MBMS data from the MBMS entity based on the MBMS configuration information; and broadcasting the MBMS data in the cell belonging to the gNB based on the broadcasting mode.

in the SC-PTM scheme of scheme 2: in a cell belonging to a gNB, an MBMS entity determines a cell ID list for broadcasting MBMS in an SC-PTM mode and distributes NR parameters for the MBMS; the allocating, by the MBMS entity, the NR parameter for the MBMS includes: the MBMS entity allocates a unique group ID for the current MBMS and determines configuration information of a bandwidth part BWP broadcasting the MBMS, wherein the configuration information of the BWP comprises: the time-frequency position, the subcarrier interval and the CP type of BWP broadcasting MBMS, the search space corresponding to a physical downlink control channel PDCCH dispatching MBMS and the configuration information of a control resource set.

A system for carrying MBMS by an independently deployed 5G system comprises an MBMS entity, an MCE set and a gNB, wherein:

the MBMS entity is used for receiving an MBMS request from a server, determining MCE corresponding to the MBMS request from an MCE set, and sending the MBMS request to the MCE;

the MCE is used for determining a cell which needs to broadcast the MBMS and belongs to a gNB, a broadcast mode of broadcasting the MBMS in the cell belonging to the gNB and MBMS configuration information corresponding to the broadcast mode;

the gNB is used for receiving the MBMS configuration information from the MCE and receiving MBMS data from an MBMS entity based on the MBMS configuration information; and broadcasting the MBMS data in the cell belonging to the gNB based on the broadcasting mode.

In one embodiment, the broadcast mode comprises at least one of: only adopting MBSFN mode; only adopting SC-PTM mode; adopting MBSFN mode or SC-PTM mode;

in the SC-PTM scheme of scheme 2: in a cell belonging to a gNB, the MCE determines a cell ID list broadcasting MBMS in an SC-PTM mode and allocates NR parameters for the MBMS; the MCE allocating NR parameters for the MBMS comprises the following steps: the MCE allocates a unique group ID for the current MBMS and determines configuration information of a BWP broadcasting the MBMS, wherein the configuration information of the BWP comprises: the time-frequency position, the subcarrier interval and the CP type of the BWP broadcasting the MBMS, the search space corresponding to a physical downlink control channel PDCCH for scheduling the MBMS and the configuration information of a control resource set.

A system for carrying MBMS by an independently deployed 5G system comprises an MBMS entity, an AMF, an MCE set and a gNB which are arranged in a 5GC, wherein:

the MBMS entity is used for receiving an MBMS request from a server and sending the MBMS request to the AMF;

the AMF is used for determining the MCE corresponding to the MBMS request from the MCE set and sending the MBMS request to the MCE;

in the SC-PTM scheme of scheme 2: in a cell belonging to a gNB, the MCE determines a cell ID list broadcasting MBMS in an SC-PTM mode and allocates NR parameters for the MBMS; the MCE allocating NR parameters for the MBMS comprises the following steps: the MCE allocates a unique group ID for the current MBMS and determines configuration information of a BWP broadcasting the MBMS, wherein the configuration information of the BWP comprises: the time-frequency position, the subcarrier interval and the CP type of BWP broadcasting MBMS, the search space corresponding to a physical downlink control channel PDCCH dispatching MBMS and the configuration information of a control resource set.

An apparatus for an independently deployed 5G system to carry MBMS, comprising a processor and a memory;

the memory has stored therein an application executable by the processor for causing the processor to perform a method of MBMS-bearing for a standalone deployed 5G system as described in any of the above.

A computer readable storage medium having stored therein computer readable instructions for performing the method of MBMS bearer by an independently deployed 5G system as described in any one of the above.

As can be seen from the foregoing technical solutions, in the embodiment of the present invention, an MBMS entity receives an MBMS request from a server, determines a cell that needs to broadcast the MBMS and belongs to a gNB, a broadcast mode in which the MBMS is broadcast in the cell belonging to the gNB, and MBMS configuration information corresponding to the broadcast mode; the gNB receives MBMS configuration information from the MBMS entity and receives MBMS data from the MBMS entity based on the MBMS configuration information; the gNB broadcasts the MBMS data in the cell belonging to the gNB based on the broadcast mode. Therefore, the functions of BM-SC, MBMS-GW, MME, MCE and the like in the LTE system are realized by adding the logic network element-MBMS entity, and the embodiment of the invention can realize that the MBMS is carried on the gNB to broadcast the MBMS in the independently deployed scene.

Moreover, the embodiment of the invention can effectively compress the time delay of MBMS bearer establishment. In addition, the specific mode of carrying the MBMS in the embodiment of the invention has various embodiments and can be flexibly applied.

Drawings

Fig. 1 is an architecture diagram of MBMS in LTE system in 3GPP protocol.

Fig. 2 is a 5G system architecture diagram of an independent deployment scenario.

Fig. 3 is a first block diagram of a system carrying MBMS in the independently deployed 5G system of the present invention.

Fig. 4 is a process flow diagram of the system shown in fig. 3.

Fig. 5 is a second structural diagram of a system for carrying MBMS in a separately deployed 5G system according to the present invention.

Fig. 6 is a process flow diagram for the system shown in fig. 5.

Fig. 7 is a third structural diagram of the MBMS-bearing system in the independently deployed 5G system of the present invention.

Fig. 8 is a process flow diagram for the system shown in fig. 7.

Fig. 9 is a structural diagram of an apparatus for carrying MBMS in a separately deployed 5G system according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the accompanying drawings.

For simplicity and clarity of description, the invention will be described below by describing several representative embodiments. Numerous details of the embodiments are set forth to provide an understanding of the principles of the invention. It will be apparent, however, that the invention may be practiced without these specific details. Some embodiments are not described in detail, but rather are merely provided as frameworks, in order to avoid unnecessarily obscuring aspects of the invention. Hereinafter, "comprising" means "including but not limited to", "according to … …" means "at least according to … …, but not limited to … … only". In view of the language convention of chinese, the following description, when it does not specifically state the number of a component, means that the component may be one or more, or may be understood as at least one.

The applicant found that: in the independently deployed 5G system illustrated in fig. 2, how to provide MBMS by MBMS bearer through 5GC and gNB has no relevant implementation manner in the industry at present. The invention provides a method and a system for broadcasting MBMS through 5GC and NR aiming at the scenes, which realize that the MBMS is broadcasted on gNB through the 5GC in the independently deployed scenes in an MBMS bearing mode. In particular: the new logic network element in the 5GC realizes the functions of BM-SC, MBMS-GW, MME, MCE and the like in the LTE system, and effectively compresses the time delay of MBMS bearer establishment.

Fig. 3 is a first block diagram of a system carrying MBMS in the independently deployed 5G system of the present invention. As shown in fig. 3, the system for carrying MBMS includes an MBMS entity and a gNB, where:

the MBMS entity is used for receiving the 'MBMS request' from the server, determining a cell which needs to broadcast the MBMS and belongs to the gNB, a broadcast mode of broadcasting the MBMS in the cell belonging to the gNB and MBMS configuration information corresponding to the broadcast mode;

the server instructs the MBMS entity to establish a corresponding MBMS bearer (or transmission channel) for the requested MBMS through the "MBMS request", and transmits the MBMS data sent by the server to the corresponding cells through the MBMS bearer (or transmission channel). The MBMS request carries MBMS conversation attribute, and the conversation attribute comprises: an MBMS broadcast area. The MBMS entity determines gNB corresponding to each cell included in the MBMS broadcast area, and the MBMS entity transmits MBMS data to the gNB through MBMS load bearing. The MBMS request may also trigger the MBMS entity or the gNB to allocate radio resources for the MBMS bearer.

In the present invention, an "MBMS request" is a name of a message that a server instructs an MBMS entity to establish an MBMS bearer (or transport channel) for an MBMS. The corresponding message may also be indicated by an "activate MBMS bearer request" or an "MBMS session start request". Regardless of the message name, the MBMS session attribute is carried in the message. The session attributes include: TMGI (optional), QOS information, MBMS broadcast area, and start time information of the MBMS service, wherein the MBMS broadcast area is defined by an MBMS service area ID list and/or a cell ID list.

In one embodiment, the broadcasting means may include: (1) only adopting MBSFN mode; (2) only adopting SC-PTM mode; (3) and adopting MBSFN mode or SC-PTM mode.

Preferably, the SC-PTM scheme includes an SC-PTM scheme of mode 1 and an SC-PTM scheme of mode 2, wherein: in the SC-PTM scheme of scheme 1: in a cell belonging to a gNB, an MBMS entity determines a cell ID list for broadcasting MBMS in an SC-PTM mode; in the SC-PTM scheme of scheme 2: in a cell belonging to a gNB, an MBMS entity determines a cell ID list for broadcasting MBMS in an SC-PTM mode and distributes an NR parameter for the MBMS; the allocating, by the MBMS entity, the NR parameter for the MBMS includes: the MBMS entity allocates a unique group ID for the current MBMS and determines configuration information of a BWP broadcasting the MBMS, wherein the configuration information of the BWP comprises: the time-frequency position, the subcarrier interval and the CP type of the BWP broadcasting the MBMS, the search space corresponding to the PDCCH scheduling the MBMS and the configuration information of the control resource set.

In one embodiment, when the broadcast mode includes an MBSFN mode, the MBMS configuration information includes: a cell ID list for broadcasting MBMS in MBSFN in a cell belonging to the gNB; radio resource configuration information uniformly allocated for the MBMS; session attributes of MBMS in an MBMS session start request; when the broadcast mode includes the SC-PTM mode of mode 1, the MBMS configuration information includes: a cell ID list for broadcasting MBMS in SC-PTM mode in the cell belonging to the gNB; session attributes of MBMS in an MBMS session start request; when the broadcast mode comprises the SC-PTM mode of the mode 2, the MBMS configuration information comprises: MBMS broadcasts the cell ID list of MBMS in SC-PTM mode in the cell belonging to gNB; session attributes of MBMS in an MBMS session start request; NR parameters allocated for MBMS, the NR parameters comprising: the MBMS entity is a unique group ID distributed to the MBMS; configuration information of a BWP broadcasting the MBMS determined by the MBMS entity.

In one embodiment, the method further comprises: the MBMS entity receives an MBMS updating request (or an MBMS bearing updating request or an MBMS conversation updating request) from a server; and the MBMS entity updates the current MBMS bearing context according to the session attribute in the message. The MBMS entity may also reallocate radio resources for the MBMS bearer or trigger the gNB to reallocate radio resources for the MBMS bearer. When the wireless resource is successfully reallocated for the MBMS bearer, the gNB continues to receive the MBMS data from the MBMS entity; when the reallocation of radio resources fails, the gNB stops receiving MBMS data from the MBMS entity.

In one embodiment, the method further comprises: the MBMS entity receives an MBMS ending request (or a request for deactivating MBMS bearing or a request for ending MBMS conversation) from the server and forwards the message to the gNB; the MBMS entity releases the MBMS bearing context of the current MBMS according to the message, releases TNL resources allocated to the bearing, and also releases corresponding wireless resources under the scene that the MBMS entity allocates wireless resources to the MBMS; and the gNB releases the radio resource occupied by the corresponding MBMS bearer according to the received message and stops receiving the MBMS data from the MBMS entity.

The server in fig. 3 may be implemented AS a GCS AS or other type of server. Preferably, other types of servers may be implemented as a vehicle networking (V2X) server.

In fig. 3, the PLMN is H-PLMN when the UE is in a non-roaming scenario; when the UE is in a roaming scenario, the PLMN is a V-PLMN. The server may be: GCS AS, V2X servers, and other types of servers. In order to be compatible with the 5GC architecture as much as possible and simplify the MBMS flow under the 5GC architecture, an N6 interface is adopted between the server and the newly added logical Entity MBMS Entity (Entity).

The newly added logical network element MBMS Entity in fig. 3 integrates the functions of BM-SC, MBMS-GW, MME and MCE. The following describes a method and a system for transmitting an MBMS under the architecture based on an MBMS request process.

When the server needs 5GC to provide MBMS load, determining each MBMS Entity corresponding to the MBMS broadcast area in the MBMS entities connected with the server. The server sends MBMS requests to each corresponding MBMS Entity through a corresponding N6 interface, the MBMS requests carry session attributes, and the session attributes comprise: QOS of MBMS, MBMS broadcast area and MBMS sending time.

After receiving the MBMS request from the server, the MBMS Entity (MBMS Entity) performs the following processes:

and (1) allocating a TMGI for the MBMS, wherein the TMGI is used for identifying the MBMS.

Here, the allocation of the TMGI to the MBMS is typically implemented by the BM-SC, which is implemented by the newly added logical Entity MBMS Entity in the present invention.

Step (2), allocating TNL resources for MBMS, comprising: transport network layer IP multicast address, C-TEID for transport MBMS session.

Here, the TNL resource allocation is a function executed by the MBMS-GW in the LTE system, and is implemented by the newly added logical Entity MBMS Entity in the present invention.

And (3) determining each gNB corresponding to the MBMS broadcast area in the gNBs connected with the gNB.

When a list of cells controlled by each gNB connected thereto is stored in the MBMS Entity, the MBMS Entity may determine each cell corresponding to the MBMS broadcast area and the corresponding gNB.

Step (4), the MBMS Entity determines the MBMS sending mode in each MBMS service area corresponding to the MBMS broadcast area or each cell corresponding to the broadcast area: MBSFN mode or SC-PTM mode.

When the MBMS is transmitted in an MBSFN manner in a service area or an area formed by a plurality of cells, the corresponding area is called an MBSFN area, and the MBMS Entity allocates radio resources for the MBMS in a unified manner. In addition to broadcasting the current MBMS in the MBSFN area, there may be at least one MBMS being transmitted in the MBSFN area before the current MBMS. The unified allocation of the radio resources for the MBMS includes: the method comprises the steps of distributing control plane radio resources for MBSFN area control plane information and distributing user plane radio resources for a current MBMS, wherein the MBSFN area control plane information is a set of configuration information of each MBMS which is sent in a corresponding MBSFN mode in a corresponding MBSFN area, the uniformly distributed control plane radio resources are used for sending the MBSFN area control plane information, and the user plane radio resources uniformly distributed for MBMS service are used for sending data of the current MBMS. When an MBMS is transmitted in an SC-PTM manner in one cell, an NR parameter set is determined for the MBMS by an MBMS Entity.

And (5) the MBMS Entity sends the MBMS request to the corresponding gNB through a logic interface M2 on the corresponding Nm interface. The message carries: MBMS session attributes. The session attributes include: TMGI and TNL information (IP multicast address, C-TEID and IP address of multicast source).

When the MBMS is transmitted in SC-PTM mode in a plurality of cells controlled by the gNB, the message also carries SC-PTM information, and the information comprises: QOS for MBMS, cell ID list for transmitting MBMS session in SC-PTM mode and NR parameter set.

When determining that the MBMS session is transmitted in an MBSFN manner in a plurality of cells controlled by the gNB, the information also carries MBSFN area configuration information, which includes: MBMS radio resource allocation information, a cell ID list for transmitting MBMS in an MBSFN manner. The MBMS radio resource allocation information includes: configuration information of a control plane radio resource used by MBSFN regional control plane information and configuration information of a user plane radio resource used by current MBMS data in an MBSFN mode.

The MBSFN area configuration information may also be carried to the gNB through separate MBMS session scheduling information.

After receiving the MBMS request, the gNB performs the following processes:

(1) according to the TNL information in the session attribute, the corresponding IP multicast distribution is joined through logical interface M1 on the Nm interface, in preparation for receiving MBMS data from the MBMS Entity.

(2) When the message has no SC-PTM message, the gNB directly feeds back the MBMS request response to the MBMS Entity.

(3) When the message contains SC-PTM information, each cell corresponding to the cell ID list in the SC-PTM information by the gNB allocates wireless resources for the MBMS according to the NR parameter set and the QOS of the MBMS, wherein the allocating the wireless resources for the MBMS comprises: and allocating control plane radio resources for SC-PTM control plane information and allocating user plane radio resources for the current MBMS. And the SC-PTM control plane information is a set of configuration information of each MBMS sent in a cell in an SC-PTM mode. The control plane radio resource is used for sending SC-PTM control plane information, and the user plane radio resource is used for sending data of the current MBMS.

When the allocation of the radio resources to the MBMS in at least one cell is successful, the gNB feeds back an MBMS request response to the MBMS Entity.

(4) When receiving the MBSFN area configuration information, the gNB saves the configuration information. And the gNB transmits the MBSFN area control plane information in the corresponding cells in an MBSFN manner by adopting the allocated control plane radio resources according to the cell ID list and the configuration information of the control plane radio resources in the configuration information. When receiving the data of the MBMS, the gNB transmits the data of the current MBMS in an MBSFN mode in a corresponding cell by adopting the allocated user plane radio resources according to the cell ID list in the MBSFN area configuration information and the configuration information of the user plane radio resources.

(5) For the MBMS transmitted in the SC-PTM mode, the gNB transmits SC-PTM control plane information in each cell corresponding to the cell ID list through the allocated control plane wireless resources. When receiving the data of the MBMS, the gNB broadcasts the data of the MBMS through the allocated user plane radio resources in each cell corresponding to the cell ID list.

It can be seen that the MBMS Entity shown in fig. 3 integrates the functions of BM-SC, MBMS-GW, MME and MCE.

Fig. 4 is a process flow diagram of the system shown in fig. 3.

As shown in fig. 4, the method includes:

step 401: the MBMS entity receives an MBMS request from a server, determines a cell which needs to broadcast the MBMS and belongs to a gNB, a broadcast mode of broadcasting the MBMS in the cell belonging to the gNB and MBMS configuration information corresponding to the broadcast mode.

Step 402: the gNB receives the MBMS configuration information from an MBMS entity and receives MBMS data from the MBMS entity based on the MBMS configuration information.

Step 403: and the gNB broadcasts the MBMS data in the cell belonging to the gNB based on the broadcasting mode.

In one embodiment, only the MBSFN scheme is adopted; only adopting SC-PTM mode; adopting MBSFN mode or SC-PTM mode; the SC-PTM mode comprises an SC-PTM mode of a mode 1 and an SC-PTM mode of a mode 2, wherein: in the SC-PTM scheme of scheme 1: in a cell belonging to a gNB, an MBMS entity determines a cell ID list for broadcasting MBMS in an SC-PTM mode; in the SC-PTM scheme of scheme 2: in a cell belonging to a gNB, an MBMS entity determines a cell ID list for broadcasting MBMS in an SC-PTM mode and distributes NR parameters for the MBMS; the allocating NR parameters for the MBMS by the MBMS entity comprises the following steps: the MBMS entity allocates a unique group ID for the current MBMS and determines configuration information of a BWP broadcasting the MBMS, wherein the configuration information of the BWP comprises: the time-frequency position, subcarrier interval and CP type of BWP broadcasting MBMS, the search space corresponding to PDCCH scheduling MBMS and the configuration information of control resource set.

In one embodiment, when the broadcast mode includes an MBSFN mode, the MBMS configuration information includes: a cell ID list for broadcasting MBMS in MBSFN in a cell belonging to the gNB; wireless resource configuration information uniformly allocated for the MBMS; session attributes of MBMS in an MBMS session start request; when the broadcast mode includes the SC-PTM mode of the mode 1, the MBMS configuration information includes: a cell ID list for broadcasting MBMS in SC-PTM mode in the cell belonging to the gNB; session attributes of MBMS in an MBMS session start request; when the broadcast mode includes the SC-PTM mode of mode 2, the MBMS configuration information includes: a cell ID list for broadcasting MBMS in SC-PTM mode in the cell belonging to the gNB; session attributes of MBMS in an MBMS session start request; NR parameters allocated for MBMS, the NR parameters comprising: the MBMS entity is a unique group ID distributed for the MBMS; configuration information of a BWP broadcasting the MBMS determined by the MBMS entity.

Fig. 5 is a second structural diagram of the MBMS-bearing system in the independently deployed 5G system according to the present invention. As shown in fig. 5, the system for carrying MBMS includes an MBMS entity, an MCE, and a gNB, where:

the MBMS entity is used for receiving the MBMS request from the server, determining MCE corresponding to the MBMS request from the MCE set and sending the MBMS request to the MCE;

the MCE is used for determining a cell which needs to broadcast the MBMS and belongs to the gNB, a broadcast mode of broadcasting the MBMS in the cell belonging to the gNB and MBMS configuration information corresponding to the broadcast mode;

In one embodiment, the broadcasting means may include: (1) only adopting MBSFN mode; (2) only adopting SC-PTM mode; (3) adopting MBSFN mode or SC-PTM mode.

Preferably, the SC-PTM scheme includes an SC-PTM scheme of mode 1 and an SC-PTM scheme of mode 2, wherein: in the SC-PTM scheme of scheme 1: in a cell belonging to a gNB, an MCE entity determines a cell ID list for broadcasting MBMS in an SC-PTM mode; in the SC-PTM scheme of scheme 2: in a cell belonging to a gNB, the MCE determines a cell ID list broadcasting MBMS in an SC-PTM mode and allocates NR parameters for the MBMS; the MCE allocating NR parameters for the MBMS comprises the following steps: the MCE allocates a unique group ID for the current MBMS and determines configuration information of a BWP broadcasting the MBMS, wherein the configuration information of the BWP comprises: the time-frequency position, subcarrier interval and CP type of BWP broadcasting MBMS, the search space corresponding to PDCCH scheduling MBMS and the configuration information of control resource set.

In one embodiment, when the broadcast mode includes an MBSFN mode, the MBMS configuration information includes: a cell ID list for broadcasting MBMS in MBSFN in a cell belonging to the gNB; wireless resource configuration information uniformly allocated for the MBMS; session attributes of MBMS in an MBMS session start request; when the broadcast mode includes the SC-PTM mode of the mode 1, the MBMS configuration information includes: a cell ID list for broadcasting MBMS in SC-PTM mode in the cell belonging to the gNB; session attributes of MBMS in an MBMS session start request; when the broadcast mode comprises the SC-PTM mode of the mode 2, the MBMS configuration information comprises: the MBMS configuration information includes: a cell ID list for broadcasting MBMS in SC-PTM mode in the cell belonging to the gNB; session attributes of MBMS in an MBMS session start request; NR parameters allocated for MBMS, the NR parameters comprising: the MBMS entity is a unique group ID distributed to the MBMS; configuration information of a BWP broadcasting the MBMS determined by the MBMS entity.

In one embodiment, the method further comprises: the MBMS entity receives an MBMS updating request (or an MBMS bearing updating request or an MBMS conversation updating request) from a server, determines MCEs corresponding to the messages from an MCE set comprising a plurality of MCEs, and sends the MBMS updating request to the MCEs; the MCE sends an MBMS updating request to the gNB; under the MBSFN mode, the MCE reallocates MBMS wireless resources for the MBMS under the MBSFN mode according to the MBMS updating request, and under the SC-PTM mode, the gNB reallocates the wireless resources for the MBMS in each cell indicated by the cell list according to the MBMS updating request; wherein when the radio resource reallocation is successful in the MBSFN mode and the SC-PTM mode, the gNB continues to receive the MBMS data from the MBMS entity; when the reallocation of radio resources fails, the gNB stops receiving MBMS data from the MBMS entity.

In one embodiment, the method further comprises: the MBMS entity receives an MBMS ending request (or a deactivation MBMS bearing request or an MBMS session ending request) from a server, determines an MCE corresponding to the message from the MCE set, and sends the MBMS ending request to the MCE; the MCE sends an MBMS end request to a corresponding gNB; the MBMS entity releases MBMS bearing context of the MBMS based on the MBMS ending request; the MCE releases the radio resources allocated to the MBMS in the MBSFN mode according to the MBMS ending request, and the gNB releases the radio resources allocated to the MBMS in the SC-PTM mode and stops receiving the MBMS data from the MBMS entity.

The server in fig. 5 may be implemented AS a GCS AS or other type of server. Preferably, other types of servers may be implemented as internet of vehicles (V2X) servers.

In fig. 5, the PLMN is H-PLMN when the UE is in a non-roaming scenario; when the UE is in a roaming scene, the PLMN is a V-PLMN. The server may be: GCS AS, V2X servers, and other types of servers. In order to be compatible with the 5GC architecture as much as possible and simplify the MBMS flow under the 5GC architecture, an N6 interface is used between the server and the newly added logical Entity MBMS Entity (Entity).

The newly added logical network element MBMS Entity in fig. 5 integrates the functions of BM-SC, MBMS-GW and MME. The function of the MCE is still performed by the MCE. The following describes a method and a system for transmitting an MBMS under the architecture based on an MBMS request process.

When only the functions of the BM-SC, the MBMS-GW, and the MME are integrated in the MBMS Entity, the MBMS Entity in the architecture shown in fig. 5 cannot perform the processes of steps (4) and (5) compared to the process performed by the MBMS Entity in the architecture shown in fig. 3. Specifically, when the processes of step (1) to step (3) are completed, the MBMS Entity and MCE perform the following processes:

and the MBMS Entity determines each MCE corresponding to the MBMS broadcast area and sends the MBMS request to the corresponding MCE through an M3 interface. The MCE determines the MBMS sending mode in each service area corresponding to the MBMS broadcast area or each cell corresponding to the MBMS broadcast area: MBSFN mode or SC-PTM mode.

When the MBMS is transmitted in the MBSFN mode in one service area or an area formed by a plurality of cells, the MCE allocates radio resources for the MBMS uniformly.

When an MBMS is transmitted in an SC-PTM manner in one cell, the MCE determines an NR parameter set for the MBMS.

The MCE receives and transmits the MBMS request to the corresponding gNB through M2. The message carries: MBMS session attributes. The session attributes include: TMGI and TNL information (IP multicast address, C-TEID and IP address of multicast source).

When determining that the MBMS session is transmitted in an MBSFN manner in a plurality of cells controlled by the gNB, the information also carries MBSFN area configuration information, which includes: MBMS radio resource allocation information, a list of cell IDs for MBMS sessions transmitted in MBSFN.

And when the MBMS request response is received from at least one gNB, the MCE feeds back the MBMS request response to the MBMS Entity. After receiving the fed-back MBMS request response, the MBMS Entity prepares to send MBMS data to each gNB that has joined the IP multicast in an IP multicast distribution manner.

Under the architecture shown in fig. 5, after receiving the MBMS request, the gNB performs the same processing as that under the architecture shown in fig. 3. However, the MBMS request response fed back by the gNB in fig. 5 is sent to the MCE through the M2 interface, instead of being fed back to the MBMS entity through the logical interface M2 on the Nm interface according to the architecture in fig. 3.

Fig. 6 is a process flow diagram for the system shown in fig. 5.

As shown in fig. 6, the method includes:

step 601: the MBMS entity receives an MBMS request from a server, determines MCEs corresponding to the MBMS request from an MCE set, and sends the MBMS request to the MCEs;

step 602: the MCE determines a cell which needs to broadcast the MBMS and belongs to a gNB, a broadcast mode of broadcasting the MBMS in the cell belonging to the gNB and MBMS configuration information corresponding to the broadcast mode;

step 603: the gNB receives the MBMS configuration information from the MCE and receives MBMS data from an MBMS entity based on the MBMS configuration information;

step 604: and the gNB broadcasts the MBMS data in the cell belonging to the gNB based on the broadcasting mode.

It can be seen that the MBMS Entity shown in fig. 5 integrates the functions of BM-SC, MBMS-GW and MME, while the functions of MCE are still performed by MCE.

Fig. 7 is a third structural diagram of the MBMS-bearing system in the independently deployed 5G system of the present invention. Fig. 8 is a process flow diagram for the system shown in fig. 7.

In fig. 7 and 8, the newly added logical network element MBMS Entity integrates the functions of BM-SC and MBMS-GW, the function of MME is implemented by AMF, and the function of MCE is still implemented by MCE. The processes that the AMF and the MCE need to perform are referred to the processes of the corresponding network elements in fig. 3 and 5.

As shown in fig. 8, the method includes:

step 801: the MBMS entity receives an MBMS request from a server, transmits the MBMS request to an AMF disposed in the 5 GC;

typically, the 5GC includes a plurality of AMFs, each AMF connecting several MCEs. After receiving the MBMS request from the server, the MBMS entity filters out several AMFs among the AMFs of the connection. Wherein: the MBMS entity filters the AMF according to the relevant information (e.g., the list of MBSM service areas) in the MBMS request.

Step 802: the AMF determines an MCE corresponding to an MBMS request from an MCE set and sends the MBMS request to the MCE;

step 803: the MCE determines a cell which needs to broadcast the MBMS and belongs to a gNB, a broadcast mode of broadcasting the MBMS in the cell belonging to the gNB and MBMS configuration information corresponding to the broadcast mode;

step 804: the gNB receives the MBMS configuration information from the MCE and receives MBMS data from an MBMS entity based on the MBMS configuration information;

step 805: and the gNB broadcasts the MBMS data in the cell belonging to the gNB based on the broadcasting mode.

Fig. 9 is a structural diagram of an apparatus for carrying MBMS in a non-independently deployed 5G system according to the present invention.

As shown in fig. 9, the apparatus includes: a processor 901 and a memory 902; in which an application program is stored in memory 902 that is executable by processor 901 for causing processor 901 to perform a method for MBMS-bearing for a separately deployed 5G system as described in any one of the above.

The memory 902 may be embodied as various storage media such as an Electrically Erasable Programmable Read Only Memory (EEPROM), a Flash memory (Flash memory), and a Programmable Read Only Memory (PROM). Processor 901 may be implemented to include one or more central processors or one or more field programmable gate arrays that integrate one or more central processor cores. In particular, the central processor or central processor core may be implemented as a CPU, MCU or Digital Signal Processor (DSP).

It should be noted that not all steps and modules in the above flows and structures are necessary, and some steps or modules may be omitted according to actual needs. The execution order of the steps is not fixed and can be adjusted as required. The division of each module is only for convenience of describing adopted functional division, and in actual implementation, one module may be divided into multiple modules, and the functions of multiple modules may also be implemented by the same module, and these modules may be located in the same device or in different devices.

The hardware modules in the various embodiments may be implemented mechanically or electronically. For example, a hardware module may include a specially designed permanent circuit or logic device (e.g., a special purpose processor such as an FPGA or ASIC) for performing specific operations. A hardware module may also include programmable logic devices or circuits (e.g., including a general-purpose processor or other programmable processor) that are temporarily configured by software to perform certain operations. The implementation of the hardware module in a mechanical manner, or in a dedicated permanent circuit, or in a temporarily configured circuit (e.g., configured by software), may be determined based on cost and time considerations.

The present invention also provides a machine-readable storage medium storing instructions for causing a machine to perform a method as described herein. Specifically, a system or an apparatus equipped with a storage medium on which a software program code that realizes the functions of any of the embodiments described above is stored may be provided, and a computer (or a CPU or MPU) of the system or the apparatus is caused to read out and execute the program code stored in the storage medium. Further, part or all of the actual operations may be performed by an operating system or the like operating on the computer by instructions based on the program code. The functions of any of the above-described embodiments may also be implemented by writing the program code read out from the storage medium to a memory provided in an expansion board inserted into the computer or to a memory provided in an expansion unit connected to the computer, and then causing a CPU or the like mounted on the expansion board or the expansion unit to perform part or all of the actual operations based on the instructions of the program code.

Examples of the storage medium for supplying the program code include floppy disks, hard disks, magneto-optical disks, optical disks (e.g., CD-ROMs, CD-R, CD-RWs, DVD-ROMs, DVD-RAMs, DVD-RWs, DVD + RWs), magnetic tapes, nonvolatile memory cards, and ROMs. Alternatively, the program code may be downloaded from a server computer or the cloud by a communication network.

"exemplary" means "serving as an example, instance, or illustration" herein, and any illustration, embodiment, or steps described as "exemplary" herein should not be construed as a preferred or advantageous alternative. For the sake of simplicity, the drawings are only schematic representations of the parts relevant to the invention, and do not represent the actual structure of the product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "a" does not mean that the number of the relevant portions of the present invention is limited to "only one", and "a" does not mean that the number of the relevant portions of the present invention "more than one" is excluded. In this document, "upper", "lower", "front", "rear", "left", "right", "inner", "outer", and the like are used only to indicate relative positional relationships between relevant portions, and do not limit absolute positions of the relevant portions.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for bearing MBMS by independently deployed 5G system is characterized by comprising the following steps:

the MBMS entity receives an MBMS request from a server, determines a cell which needs to broadcast the MBMS and belongs to a gNB, a broadcast mode of broadcasting the MBMS in the cell belonging to the gNB and MBMS configuration information corresponding to the broadcast mode;

the gNB broadcasts the MBMS data in the cell belonging to the gNB based on the broadcasting mode;

the broadcasting mode includes at least one of the following: only adopting a multimedia broadcast multicast single frequency network MBSFN mode; only adopting a single-cell point-to-multipoint SC-PTM mode; adopting MBSFN mode or SC-PTM mode;

in the SC-PTM scheme of scheme 2: in a cell belonging to a gNB, an MBMS entity determines a cell ID list for broadcasting MBMS in an SC-PTM mode and distributes NR parameters for the MBMS; the allocating, by the MBMS entity, the NR parameter for the MBMS includes: the MBMS entity allocates a unique group ID for the current MBMS and determines configuration information of a bandwidth part BWP broadcasting the MBMS, wherein the configuration information of BWP comprises: the time-frequency position, the subcarrier interval and the CP type of BWP broadcasting MBMS, the search space corresponding to a physical downlink control channel PDCCH dispatching MBMS and the configuration information of a control resource set.

2. The method of claim 1,

when the broadcast mode includes the MBSFN mode, the MBMS configuration information includes: a cell ID list for broadcasting MBMS in MBSFN in a cell belonging to the gNB; wireless resource configuration information uniformly allocated for the MBMS; session attributes of the MBMS in the MBMS request;

when the broadcast mode includes the SC-PTM mode of mode 1, the MBMS configuration information includes: a cell ID list for broadcasting MBMS in SC-PTM mode in the cell belonging to the gNB; session attributes of the MBMS in the MBMS request;

when the broadcast mode comprises the SC-PTM mode of the mode 2, the MBMS configuration information comprises: a cell ID list for broadcasting MBMS in SC-PTM mode in the cell belonging to the gNB; session attributes of the MBMS in the MBMS request; NR parameters allocated for MBMS, the NR parameters comprising: the MBMS entity is a unique group ID distributed for the MBMS; configuration information of a BWP broadcasting the MBMS determined by the MBMS entity.

3. A method for bearing MBMS by independently deployed 5G system is characterized by comprising the following steps:

in the SC-PTM scheme of scheme 2: in a cell belonging to a gNB, the MCE determines a cell ID list broadcasting MBMS in an SC-PTM mode and allocates NR parameters for the MBMS; the allocating, by the MCE, the NR parameter for the MBMS includes: the MCE allocates a unique group ID for the current MBMS and determines configuration information of a bandwidth part BWP broadcasting the MBMS, wherein the configuration information of the BWP includes: the time-frequency position, the subcarrier interval and the CP type of BWP broadcasting MBMS, the search space corresponding to a physical downlink control channel PDCCH dispatching MBMS and the configuration information of a control resource set.

4. The method of claim 3,

when the broadcast mode includes an MBSFN mode, the MBMS configuration information includes: a cell ID list for broadcasting MBMS in MBSFN in a cell belonging to the gNB; radio resource configuration information uniformly allocated for the MBMS; session attributes of the MBMS in the MBMS request;

when the broadcast mode includes the SC-PTM mode of the mode 1, the MBMS configuration information includes: a cell ID list for broadcasting MBMS in SC-PTM mode in the cell belonging to the gNB; session attributes of the MBMS in the MBMS request;

when the broadcast mode comprises the SC-PTM mode of the mode 2, the MBMS configuration information comprises: a cell ID list for broadcasting MBMS in SC-PTM mode in the cell belonging to the gNB; session attributes of the MBMS in the MBMS request; NR parameters allocated for MBMS, the NR parameters comprising: the MBMS entity is a unique group ID distributed to the MBMS; configuration information of a BWP broadcasting the MBMS determined by the MBMS entity.

5. A method for bearing MBMS by independently deployed 5G system is characterized by comprising the following steps:

the MBMS entity receives an MBMS request from a server, transmits the MBMS request to an AMF arranged in a 5 GC;

the broadcast mode includes at least one of: only adopting a multimedia broadcast multicast single frequency network MBSFN mode; only adopting a single-cell point-to-multipoint SC-PTM mode; adopting MBSFN mode or SC-PTM mode;

in the SC-PTM scheme of scheme 2: in a cell belonging to a gNB, the MCE determines a cell ID list for broadcasting MBMS in an SC-PTM mode and allocates an NR parameter for the MBMS; the MCE allocating NR parameters for the MBMS comprises the following steps: the MCE allocates a unique group ID for the current MBMS and determines configuration information of a bandwidth part BWP broadcasting the MBMS, wherein the configuration information of the BWP includes: the time-frequency position, the subcarrier interval and the CP type of BWP broadcasting MBMS, the search space corresponding to a physical downlink control channel PDCCH dispatching MBMS and the configuration information of a control resource set.

6. The method of claim 5,

when the broadcast mode includes the MBSFN mode, the MBMS configuration information includes: a cell ID list for MBSFN broadcasting of MBMS in cells belonging to gNB; wireless resource configuration information uniformly allocated for the MBMS; session attributes of the MBMS in the MBMS request;

7. A system for carrying MBMS by an independently deployed 5G system is characterized by comprising an MBMS entity and a gNB, wherein:

the gNB is used for receiving the MBMS configuration information from the MBMS entity and receiving MBMS data from the MBMS entity based on the MBMS configuration information; broadcasting the MBMS data in the cell belonging to the gNB based on the broadcasting mode;

8. A system for carrying MBMS by an independently deployed 5G system is characterized by comprising an MBMS entity, an MCE set and a gNB, wherein:

the gNB is used for receiving the MBMS configuration information from the MCE and receiving MBMS data from an MBMS entity based on the MBMS configuration information; broadcasting the MBMS data in the cell belonging to the gNB based on the broadcasting mode;

9. A system for carrying MBMS by an independently deployed 5G system is characterized by comprising an MBMS entity, AMF arranged in a 5GC, an MCE set and a gNB, wherein:

in the SC-PTM scheme of scheme 2: in a cell belonging to a gNB, the MCE determines a cell ID list broadcasting MBMS in an SC-PTM mode and allocates NR parameters for the MBMS; the MCE allocating NR parameters for the MBMS comprises the following steps: the MCE allocates a unique group ID for the current MBMS and determines configuration information of a bandwidth part BWP broadcasting the MBMS, wherein the configuration information of the BWP includes: the time-frequency position, the subcarrier interval and the CP type of BWP broadcasting MBMS, the search space corresponding to a physical downlink control channel PDCCH dispatching MBMS and the configuration information of a control resource set.

10. An apparatus for carrying MBMS in an independently deployed 5G system, comprising a processor and a memory;

the memory has stored therein an application executable by the processor for causing the processor to perform the method of MBMS-bearing for an independently deployed 5G system of any of claims 1 to 6.

11. A computer readable storage medium having stored therein computer readable instructions for performing the method of MBMS-bearing for an independently deployed 5G system of any of claims 1 to 6.