CN113645668B

CN113645668B - Method, device and storage medium for multi-cell MBMS service transmission

Info

Publication number: CN113645668B
Application number: CN202010345792.1A
Authority: CN
Inventors: 张大钧
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2020-04-27
Filing date: 2020-04-27
Publication date: 2023-03-24
Anticipated expiration: 2040-04-27
Also published as: CN113645668A; WO2021218301A1

Abstract

The invention discloses a method, a device and a storage medium for multi-cell MBMS service transmission, which are used for solving the technical problem of longer transmission interruption time delay of MBMS service in the prior art, and comprise the following steps: determining a plurality of first cells from a plurality of MBMS transmission cells; wherein, a plurality of first cells form a synchronous area; determining configuration information of each first cell; the configuration information enables a single-cell MBMS service control channel SC-MCCH of each first cell to be located at the same scheduling position; and sending the configuration information of the first cell to the DU to which the first cell belongs so that the first cell transmits the MBMS service according to the configuration information.

Description

Method, device and storage medium for multi-cell MBMS service transmission

Technical Field

The present invention relates to the field of wireless communications, and in particular, to a method, an apparatus, and a storage medium for multi-cell MBMS service transmission.

Background

In the existing fourth generation mobile communication (4G) Multimedia Broadcast Multicast Service (MBMS) technology, only Multicast Single Network (MBSFN) and Single Cell To Multipoint (SC-PTM) transmission modes of a Single Cell are supported, and a User Equipment (UE) in an idle (idle) or connected (connected) state is allowed To receive the MBMS Service.

However, in the existing 4G MBMS technology, the MBSFN transmission needs to allow synchronous service transmission in the whole MBSFN area, which makes the signaling design too complex; however, the SC-PTM transmission needs to support the MBMS Service transmission of the local cell, which may cause the UE to re-perform the process of reading an individual Single-cell MBMS Service Control channel (SC-MCCH) when moving across cells, thereby increasing the transmission interruption delay of the MBMS Service.

In view of this, how to reduce the transmission interruption delay of the MBMS service becomes a technical problem to be solved urgently.

Disclosure of Invention

The invention provides a method, a device and a storage medium for multi-cell MBMS service transmission, which are used for solving the technical problem of longer transmission interruption time delay of MBMS service in the prior art.

In a first aspect, to solve the foregoing technical problem, an embodiment of the present invention provides a method for transmitting a multi-cell MBMS service, which is applied to a central unit CU, where a technical solution of the method is as follows:

determining a plurality of first cells from a plurality of MBMS transmission cells; wherein the plurality of first cells constitute a synchronization area;

determining configuration information of each of the first cells; the configuration information enables a single-cell MBMS service control channel SC-MCCH of each first cell to be located at the same scheduling position;

and sending corresponding configuration information to the DU to which each first cell belongs, so that all the first cells transmit the same MBMS according to the corresponding configuration information.

Optionally, before determining the plurality of first cells from the plurality of MBMS transmission cells, the method further includes:

receiving MBMS service area information of the plurality of MBMS transmission cells; wherein, the MBMS service area information comprises the service area information of the MBMS transmission cell.

Optionally, the MBMS service area information further includes a synchronization area identifier.

Optionally, the receiving the MBMS service area information of the multiple MBMS transmission cells includes:

receiving corresponding MBMS service area information from a first DU controlled by the CU; wherein the CU and the first DU belong to the same base station;

and/or, receiving the corresponding MBMS service area information from a second DU controlled by a neighboring base station; wherein the neighboring base station is a base station neighboring to a base station including the CU.

Optionally, if there are multiple second cells belonging to the same DU in the multiple first cells, the configuration information corresponding to the multiple second cells is sent to the DU in a list form.

Optionally, the content transmitted on the SC-MCCH of all the first cells comprises the same SC-MTCH configuration list.

Optionally, each SC-MTCH corresponds to one temporary mobile group identity, TMGI, and session identity, and one group radio network temporary identifier, G-RNTI.

Optionally, the SC-MCCH of all the first cells further includes the same neighbor cell configuration list; and the adjacent cells in the adjacent cell configuration list are adjacent cells of the synchronization region.

Optionally, the repetition period, the modification period, and the offset value of the SC-MCCH of all the first cells, or the configuration of the signaling modulation and coding method MCS, are all the same.

In a second aspect, to solve the above technical problem, an embodiment of the present invention provides a method for transmitting a multi-cell MBMS service, which is applied to a distribution unit DU, and a technical solution of the method is as follows:

receiving configuration information of all second cells belonging to the DU, which is sent by a centralized unit CU; wherein the configuration information enables the second cell and the single-cell MBMS control channel SC-MCCH of all first cells in a synchronization area to be located at the same scheduling position, the first cells are determined by the CU from a plurality of MBMS transmission cells, and all the second cells are all the first cells or some cells in the first cells;

and transmitting the same MBMS service in each second cell according to the configuration information corresponding to each second cell.

Optionally, before receiving the configuration information of all second cells belonging to the DU sent by the central unit CU, the method further includes:

transmitting MBMS service area information of the DU to the CU; wherein the MBMS service area information includes service area information of the DU.

Optionally, if the number of all the second cells is multiple, the configuration information corresponding to the multiple second cells is received from the CU in a form of a list.

Optionally, the DU and the CU belong to the same base station, or the base station to which the DU belongs is an adjacent base station adjacent to the base station including the CU.

In a third aspect, an embodiment of the present invention provides an apparatus for multi-cell MBMS service transmission, where the apparatus is applied to a centralized unit CU, and the apparatus includes:

a determining unit configured to determine a plurality of first cells from a plurality of MBMS transmission cells; wherein the plurality of first cells constitute a synchronization area;

a configuration unit, configured to determine configuration information of each of the first cells; the configuration information enables a single-cell MBMS service control channel SC-MCCH of each first cell to be located at the same scheduling position;

a transceiving unit, configured to send corresponding configuration information to the DU to which each of the first cells belongs, so that all the first cells transmit the same MBMS service according to the corresponding configuration information.

Optionally, the transceiver unit is further configured to:

Optionally, the transceiver unit is specifically configured to:

and/or receiving corresponding MBMS service area information from a second DU controlled by a neighboring base station; wherein the neighboring base station is a base station neighboring to a base station including the CU.

Optionally, each SC-MTCH corresponds to one temporary mobile group identity TMGI and session identity, and one group radio network temporary identifier G-RNTI.

Optionally, the SC-MCCH of all the first cells further includes the same neighboring cell configuration list; and the adjacent cells in the adjacent cell configuration list are adjacent cells of the synchronization region.

In a fourth aspect, an embodiment of the present invention provides an apparatus for multi-cell MBMS service transmission, where the apparatus is applied to a distribution unit DU, and the apparatus includes:

a receiving unit, configured to receive configuration information of all second cells belonging to the DU, sent by a central unit CU; wherein the configuration information enables the second cell and a single-cell MBMS control channel SC-MCCH of all first cells in a synchronization area to be located at the same scheduling position, the first cells are determined by the CU from a plurality of MBMS transmission cells, and all the second cells are all the first cells or part of all the first cells;

and a sending unit, configured to transmit the same MBMS service in each second cell according to the configuration information corresponding to each second cell.

Optionally, the sending unit is further configured to:

In a fifth aspect, an embodiment of the present invention further provides an apparatus for multi-cell MBMS service transmission, where the apparatus is applied to a centralized unit CU, and the apparatus includes: a processor, a memory, and a transceiver;

the processor is used for reading the program in the memory and executing the following processes:

Optionally, the processor is further configured to:

Optionally, the contents transmitted on the SC-MCCH of all the first cells include the same SC-MTCH configuration list.

In a sixth aspect, an embodiment of the present invention further provides an apparatus for multi-cell MBMS service transmission, where the apparatus is applied to a distribution unit DU, and the apparatus includes: a processor, a memory, and a transceiver;

receiving configuration information of all second cells belonging to the DU, which is sent by a central unit CU; wherein the configuration information enables the second cell and a single-cell MBMS control channel SC-MCCH of all first cells in a synchronization area to be located at the same scheduling position, the first cells are determined by the CU from a plurality of MBMS transmission cells, and all the second cells are all the first cells or part of all the first cells;

Optionally, the processor is further configured to:

In a seventh aspect, an embodiment of the present invention further provides a readable storage medium, including:

a memory for storing instructions that, when executed by the processor, cause an apparatus comprising the readable storage medium to perform the method of the first or second aspect as described above.

Through the technical solutions in one or more of the above embodiments of the present invention, the embodiments of the present invention have at least the following technical effects:

in the embodiment provided by the invention, a plurality of first cells are determined from a plurality of MBMS transmission cells through a CU, and the plurality of first cells form a synchronous area; when determining the configuration information of each first cell, enabling a single-cell MBMS service control channel SC-MCCH of each first cell to be located at the same scheduling position; and then, sending the configuration information of the first cell to the DU to which the first cell belongs, so that the first cell transmits the MBMS service according to the configuration information. This makes it unnecessary to re-read the SC-MCCH when the user terminal moves across cells in the synchronization area, thereby avoiding interrupting the MBMS service being received and reducing the transmission terminal delay of the MBMS service.

Drawings

Fig. 1 is a flowchart of a method for transmitting a multi-cell MBMS service on a CU side according to an embodiment of the present invention;

fig. 2 is a flowchart of a method for transmitting a multi-cell MBMS service on a DU side according to an embodiment of the present invention;

fig. 3 is a flowchart illustrating a multi-cell MBMS service transmission performed in the same DU according to an embodiment of the present invention;

fig. 4 is a flowchart illustrating multi-cell MBMS service transmission between different DUs according to an embodiment of the present invention;

fig. 5 is a first schematic structural diagram of multi-cell MBMS service transmission on a CU side according to an embodiment of the present invention;

fig. 6 is a first schematic structural diagram of multi-cell MBMS service transmission at a DU side according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a multi-cell MBMS service transmission on a CU side according to an embodiment of the present invention;

fig. 8 is a structural diagram illustrating a multi-cell MBMS service transmission at a DU side according to an embodiment of the present invention.

Detailed Description

The embodiment of the invention provides a method, a device and a storage medium for multi-cell MBMS service transmission, which aim to solve the technical problem of long transmission interruption time delay of MBMS service in the prior art.

In order to solve the technical problems, the general idea of the embodiment of the present application is as follows:

a method for multi-cell MBMS service transmission is provided, wherein a centralized unit CU is applied, and the method comprises the following steps: determining a plurality of first cells from a plurality of MBMS transmission cells; wherein, a plurality of first cells form a synchronous area; determining configuration information of each first cell; the configuration information enables a single-cell MBMS service control channel SC-MCCH of each first cell to be located at the same scheduling position; and sending the configuration information of the first cell to the DU to which the first cell belongs so that the first cell transmits the MBMS service according to the configuration information.

In the scheme, a plurality of first cells are determined from a plurality of MBMS transmission cells through a CU, so that the plurality of first cells form a synchronous area; when determining the configuration information of each first cell, enabling a single-cell MBMS service control channel SC-MCCH of each first cell to be located at the same scheduling position; and then, sending the configuration information of the first cell to the DU to which the first cell belongs, so that the first cell transmits the MBMS service according to the configuration information. This makes it unnecessary to re-read the SC-MCCH when the user terminal moves across cells in the synchronization area, thereby avoiding interruption of the MBMS service being received and further reducing the transmission terminal delay of the MBMS service.

In order to better understand the technical solutions of the present invention, the following detailed descriptions of the technical solutions of the present invention are provided with the accompanying drawings and the specific embodiments, and it should be understood that the specific features in the embodiments and the examples of the present invention are the detailed descriptions of the technical solutions of the present invention, and are not limitations of the technical solutions of the present invention, and the technical features in the embodiments and the examples of the present invention may be combined with each other without conflict.

Referring to fig. 1, an embodiment of the present invention provides a method for multi-cell MBMS service transmission, which is applied to a centralized unit CU of a first base station, and the processing procedure of the method is as follows.

Step 101: determining a plurality of first cells from a plurality of MBMS transmission cells; wherein the plurality of first cells constitute one synchronization area.

Before the CU determines a plurality of first cells from the plurality of MBMS transmission cells, the method further includes:

receiving MBMS service area information of a plurality of MBMS transmission cells; the MBMS service area information comprises service area information of an MBMS transmission cell.

The MBMS service area information further includes a synchronization area identification.

In the embodiment provided by the present invention, the receiving of the MBMS service area information of a plurality of MBMS transmission cells may be receiving the corresponding MBMS service area information from the first DU controlled by the CU; wherein, the CU and the first DU belong to the same base station.

And/or receiving corresponding MBMS service area information from a second DU controlled by the adjacent base station; the adjacent base station is a base station adjacent to the base station including the CU.

It should be noted that the CUs indirectly receive the MBMS service area information of the second DU by controlling the CUs of the second DU.

For example, CU belongs to base station 1, DU1-DU 5 also belong to base station 1 and are controlled by CU, DU 6-DU 9 belong to base station 2, DU10-DU 20 belong to base station 3.

The CU may receive MBMS service area information corresponding to the DU from any one or more of the DUs 1-DU 20.

When receiving MBMS service area information from multiple DUs, the multiple DUs may belong to one base station or different base stations, which is not limited specifically.

Upon receiving the MBMS service area information of the plurality of DUs, the MBMS service area information includes service area information of an MBMS transmission cell. The MBMS service area information further includes a synchronization area identification.

The CU can count the required quantity of the MBMS and RRM strategies and the like according to the received MBMS service area information, and then determine a plurality of first cells from a plurality of MBMS transmission cells.

For example, a plurality of first cells that need to transmit the same MBMS service among a plurality of MBMS transmission cells may constitute one synchronization area.

For example, a CU in a first base station only receives MBMS service area information reported by DUs belonging to the first base station, the CU determines that MBMS transmission cells 1 to 3 provide the same MBMS service for user terminals according to the MBMS service area information, and the CU forms a synchronization area with the MBMS transmission cells 1 to 3.

For another example, the CU receives MBMS service area information reported by the DUs in the base stations 1 to 3, and the MBMS service area information corresponding to each DU includes a synchronization area identifier, and the CU determines to transmit the MBMS service 1 only in the MBMS transmission cells 1 to 5, the MBMS transmission cell 12, and the MBMS transmission cell 23 according to the MBMS service area information reported by each DU, so that the MBMS transmission cells 1 to 5, the MBMS transmission cell 12, and the MBMS transmission cell 23 form a synchronization area.

After determining a plurality of first cells from the plurality of MBMS transmission cells, step 102 may be performed.

Step 102: determining configuration information of each first cell; the configuration information enables the single-cell MBMS service control channel SC-MCCH of each first cell to be located at the same scheduling position.

In the embodiments provided by the present invention, the content transmitted on the SC-MCCH of all the first cells comprises the same SC-MTCH configuration list.

Wherein, each SC-MTCH corresponds to a Temporary Mobile Group Identifier (TMGI) and a session identifier, and a group radio network temporary identifier (G-RNTI).

The SC-MCCHs of all the first cells also comprise the same adjacent cell configuration list; and the adjacent cells in the adjacent cell configuration list are adjacent cells of the synchronization region.

In the embodiment provided by the invention, the repetition period, the modification period and the offset value of the SC-MCCH of all the first cells, or the signaling modulation and coding method MCS configuration are all the same. This allows all first cells in the synchronization area to have the same scheduling position.

After determining the configuration information of each first cell, step 103 may be performed.

Step 103: and sending corresponding configuration information to the DU to which each first cell belongs, so that all the first cells transmit the same MBMS according to the corresponding configuration information.

If there are multiple second cells belonging to the same DU in the multiple first cells, the configuration information corresponding to the multiple second cells is sent to the DU in the form of a list.

For example, a first cell in the synchronization region includes: first cells 1 to 5 belonging to DU1, first cell 12 belonging to DU2, and first cell 23 belonging to DU3.

The CU then forms a multi-cell list 1 from the configuration information of the first cells 1 to 5, sends the multi-cell list 1 to the DU1, sends the configuration information of the first cell 12 to the DU2, and sends the configuration information of the first cell 23 to the DU3.

Actually, for unified management, the configuration information of the first cell corresponding to each DU may be transmitted to the corresponding DU in the form of a list.

For example, the configuration information of the first cell 12 is transmitted to the DU2 as the multi-cell list 2, and the configuration information of the first cell 23 is transmitted to the DU2 as the multi-cell list 3.

In the embodiments provided by the present invention, the multi-cell list may be sent to the corresponding DU through a common message.

If the DU and the CU belong to the same base station, information is transmitted between the CU and the DU through the F1 interface.

If DU and CU belong to different base stations, information is transmitted between CU and DU by Xn/Mn interface.

For example, the CU forms a multi-cell list 1 corresponding to DU1, a multi-cell list 2 corresponding to DU2, and a multi-cell list 3 corresponding to DU3 in the synchronization area.

If DU1 and CU both belong to base station 1, CU transmits the multi-cell list 1 to DU1 through F1 interface; if DU2 and DU3 belong to base station 2 and CU belongs to base station 1, CU transmits multi-cell list 2 to DU2 in base station 2 via Xn/Mn interface and multi-cell list 3 to DU3 in base station 3 via Xn/Mn interface.

The CU determines to configure the control signaling content of the multi-cell MBMS transmission according to the MBMS service information from the core network, the RRM policy, and the like, and accordingly, includes the same configuration parameters of the multiple cell SC-MCCH, including but not limited to the SC-MTCH configuration list, in the scheduling message sent to the DU.

The same neighbor cell configuration list may also be included in the scheduling message.

The scheduling message may be transmitted through a common message or a dedicated message.

The content of the scheduling message may be encapsulated in F1AP IE or RRC container.

After the CU sends the configuration information and scheduling message of the first cell to the DU, MBMS session related information may also be sent to the DU.

And the MBMS session related information may be carried in the same signaling as the scheduling message. Specifically, the MBMS session related information may include:

TMGI and session identification, MBMS service transport address information, and MBMS service area.

After the method of multi-cell MBMS service transmission is introduced from the CU side, it will be described from the DU side.

Referring to fig. 2, an embodiment of the present invention provides a method for transmitting a multi-cell MBMS service, which is applied to a distribution unit DU of a first base station, and the method includes:

step 201: receiving configuration information of all second cells belonging to the DU, which is sent by a CU; the configuration information enables single-cell MBMS control channels SC-MCCHs of the second cells and all first cells in the synchronous area to be located at the same scheduling position, the first cells are determined by a CU from a plurality of MBMS transmission cells, and all the second cells are all the first cells or part of all the first cells.

Before receiving the configuration information of all second cells belonging to the DU and sent by the CU, the DU also sends the MBMS service area information of the DU to the CU; wherein, the MBMS service area information includes service area information of the DU.

The MBMS service area information also comprises a synchronization area identification.

For example, when a plurality of DUs located in the same base station as the CU transmit MBMS service area information, they may carry no synchronization area identifier or a synchronization area identifier. This is because there is a large probability that a plurality of DUs located under the same base station will form a synchronization region, and therefore the synchronization region id may or may not be carried.

And for multiple DUs belonging to different base stations, synchronization zone identities need to be carried.

For example, the DU reports MBMS service area information to CUs belonging to the same base station, the CU determines that there are cells 3 to 6 providing the same MBMS service to the user terminal according to the MBMS service area information, and the CU combines the cells 3 to 6 into one synchronization area.

For another example, the base station to which the DU belongs is a neighboring base station of the CU forming the synchronization area, that is, the DU and the CU belong to different base stations, and when the DU reports the MBMS service area information to the CU, the DU needs to carry the synchronization area identifier.

After the CU receives the DU to send the MBMS service area information, a plurality of first cells are determined from a plurality of MBMS transmission cells under all DUs according to the MBMS service area information received from all DUs, and the plurality of first cells form a synchronous area.

And the CU also determines corresponding configuration information for the plurality of first cells, wherein the configuration information enables the single-cell MBMS service control channel SC-MCCH of each first cell to be located at the same scheduling position.

The CU may form a list of configuration information of a plurality of second cells belonging to the same DU in the plurality of first cells, and send the list to the corresponding DU.

Accordingly, this allows the DU to receive configuration information corresponding to a plurality of second cells from the CU in the form of a list when the number of all second cells belonging to the DU is plural.

For example, if the CU determines the cells 1 to 10 as a plurality of first cells, where the cells 5 to 8 belong to the DU, the cells 5 to 8 are all referred to as second cells as described in the present application, and the CU transmits the configuration information of the cells 5 to 8 to the DU in the form of a list, so that the DU receives the configuration information of the cells 5 to 8 in the form of a list.

In the embodiments provided by the present invention, the content transmitted on the SC-MCCH of all the first cells comprises the same SC-MTCH configuration list. The corresponding content transmitted on the SC-MCCH of all second cells also includes the same SC-MTCH configuration list.

Wherein each SC-MTCH corresponds to one Temporary Mobile Group Identity (TMGI) and session identity and one group radio network temporary identifier (G-RNTI).

In the embodiment provided by the invention, the SC-MCCH of all the first cells further includes the same neighbor cell configuration list; and the adjacent cells in the adjacent cell configuration list are all adjacent cells of the first cell. All corresponding second cells also include the neighbor cell configuration list.

In the embodiment provided by the invention, the repetition period, the modification period and the offset value of each SC-MCCH in all the first cells, or the signaling modulation and coding method MCS configuration are the same. This allows all first cells in the synchronization area to have the same scheduling position. Correspondingly, all second cells also have the same scheduling position.

In the embodiments provided by the present invention, the DU and the CU may belong to the same base station, or the base station to which the DU belongs is a neighboring base station adjacent to the base station including the CU.

If the DU and the CU belong to the same base station, messages are transmitted between the CU and the DU through the F1 interface.

If the base station to which the DU belongs is a neighboring base station of the CU (i.e. the DU and the CU belong to different base stations), messages are transmitted between the CU and the DU through the Xn/Mn interface.

The CU decides to configure the control signaling of multi-cell MBMS transmission for the first cells according to MBMS service information from the core network, RRM strategy and the like, and correspondingly, the scheduling message of the DU comprises the configuration parameters of SC-MCCH of the first cells.

In the embodiment provided by the present invention, the DU may also receive MBMS session related information sent by the CU.

And the MBMS session related information may be carried in the same signaling as the scheduling message.

Specifically, the MBMS session related information may include:

a Temporary Mobile Group Identifier (TMGI) and a session identifier, MBMS service transport address information, and an MBMS service area.

It should be noted that the common message and the scheduling message may be sent separately or together.

In the embodiment provided by the invention, the content of the scheduling message is encapsulated by using F1AP IE or RRCcondutanizer.

After receiving the configuration information of all the second cells belonging to the DU from the CU, step 202 is executed.

Step 202: and transmitting the same MBMS service in each second cell according to the configuration information corresponding to each second cell.

In the implementation provided by the present invention, the following method may be adopted for transmitting the same MBMS service in the second cell:

transmitting MBMS-specific System Information Block (SIB) to the user terminal; the MBMS specific SIB comprises configuration parameters of SC-MCCH; then, sending SC-MCCH information to the user terminal at the designated position; the content of the SC-MCCH message is MBMS service data provided by the CU.

In order that those skilled in the art will be able to fully understand the foregoing, two specific examples will now be provided:

in the first embodiment, it is assumed that the DU and the CU belong to the same base station.

Please refer to fig. 3, which is a flowchart illustrating a multi-cell MBMS service transmission performed in the same DU according to an embodiment of the present invention.

Step 301: and reporting the MBMS service area information to the CU of the first base station by the DU of the first base station.

The MBMS service area information is reported through an F1 interface, and the MBMS service area information comprises a service area of a DU and the like.

It should be noted that there may be one or more DUs under the first base station, and there may be one or more DUs reporting the MBMS service area information to the CU correspondingly. When a plurality of DUs report the MBMS service area information to the CU, one DU corresponds to one MBMS service area information.

Step 302: a CU of a first base station determines a plurality of first cells from a plurality of MBMS transmission cells belonging to a DU according to the MBMS service area information, and determines corresponding configuration information for each first cell; wherein the plurality of first cells constitute one synchronization area.

According to the information such as the MBMS required quantity counted from the MBMS service area information, the RRM strategy and the like, a CU of the first base station determines a plurality of first cells from a plurality of MBMS transmission cells belonging to the DU to carry out multi-cell MBMS transmission, and determines the configuration information of each first cell to ensure that all the first cells have the same scheduling position; the same scheduling location refers to that the repetition period, modification period, and offset value included in the SC-MCCH of each first cell, or the signaling MCS configuration, etc. are the same. Furthermore, the CU may form a list of configuration information of the plurality of first zones, and the list may be referred to as a multi-cell list.

Since the plurality of first cells are all from the same DU, the plurality of first cells in this embodiment are also the plurality of second cells belonging to the same DU as described above.

Step 303: the CU of the first base station sends a common message to the DU of the first base station.

The common message contains a multi-cell list and is transmitted over the F1 interface.

Step 304: and the CU of the first base station configures multi-cell MBMS transmission control signaling for the plurality of first cells according to the MBMS service information from the core network and the RRM strategy, and forms corresponding scheduling information.

The scheduling message includes configuration parameters of the SC-MCCH of each first cell including, but not limited to, SC-MTCH list information. Wherein each SC-MTCH corresponds to one TMGI + Session ID (Session identity), and one G-RNTI (for scheduling data).

Optionally, the scheduling message further includes the same neighbor cell configuration list, that is, the neighbor cell is a neighbor cell for the entire synchronization region, and the like. The contents of the scheduling message may be in the form of a F1AP IE or in the form of RRCcontainer.

305. The CU of the first base station sends a scheduling message to the DU.

The scheduling message may be transmitted through a common message or a dedicated message of the F1 interface.

It should be noted that step 303 and step 305 may be combined into one step, that is, the CU transmits the common message and the scheduling message simultaneously through one signaling, or may transmit them separately through two signaling.

Step 306: the CU of the first base station sends MBMS session related information to the DU.

Session-related information includes, but is not limited to: TMGI + conversation mark, corresponding MBMS service transmission address information, MBMS service area, etc.

It should be noted that step 305 and step 306 may be combined into one step, that is, the CU transmits the scheduling message and the MBMS session related information simultaneously through one signaling, or may transmit them separately through two signaling.

Step 307: the DU of the first base station starts the multi-cell MBMS transmission mode according to the common message and the scheduling message.

Step 308: the DU of the first base station sends MBMS specific SIB information to the user terminal.

The specific SIB information includes configuration parameters of the SC-MCCH.

Step 309: the DU of the first base station sends the SC-MCCH message at the designated location.

Through steps 308 and 309, the DU of the first base station may transmit the data of the MBMS service provided by the core network to the user terminal in the multi-cell MBMS service transmission manner.

In the second embodiment, it is assumed that the DU and the CU belong to different base stations.

Please refer to fig. 4, which is a flowchart illustrating a multi-cell MBMS service transmission between different DUs according to an embodiment of the present invention.

Step 401a: and the DU of the first base station reports the MBMS service area information 1 to the CU of the first base station.

The MBMS service area information 1 is reported through an F1 interface, and the MBMS service area information 1 includes a service area and the like corresponding to a DU in the first base station. The MBMS service area information 1 further includes a synchronization area id corresponding to the DU.

It should be noted that, there may be one or multiple DUs in the first base station, and there may be one or multiple DUs in the corresponding first base station that report the MBMS service area information to the CU. When a plurality of DUs in the first base station report the MBMS service area information to the CU, one DU corresponds to one MBMS service area information 1.

Step 401b: and the DU of the second base station reports the MBMS service area information 2 to the CU of the first base station.

The MBMS service area information 2 is reported through the F1 interface, and the MBMS service area information 2 includes a service area of a DU corresponding to the second base station, and the like. The MBMS service area information 2 further includes a synchronization area identifier corresponding to the DU.

It should be noted that there may be one or more DUs under the second base station, and there may be one or more DUs reporting the MBMS service area information to the CU in the corresponding second base station. When a plurality of DUs report the MBMS service area information to the CU in the second base station, one DU corresponds to one MBMS service area information 2.

Step 402: according to MBMS service area information 1 and 2, a CU of a first base station determines a plurality of first cells from a plurality of MBMS transmission cells corresponding to a DU belonging to the first base station and a DU belonging to a second base station respectively, and determines corresponding configuration information for each first cell; wherein the plurality of first cells constitute one synchronization area.

According to the information such as the MBMS required quantity counted from the MBMS service area information 1 and the MBMS service area information 2, the information such as RRM strategy and the like, a CU of a first base station determines a plurality of first cells to carry out multi-cell MBMS transmission from a plurality of MBMS transmission cells corresponding to a DU belonging to the first base station and a DU belonging to a second base station respectively, and determines the configuration information of each first cell to ensure that all the first cells have the same scheduling position; the same scheduling location refers to that the repetition period, modification period, and offset value included in the SC-MCCH of each first cell, or the signaling MCS configuration, etc. are the same. Furthermore, the CU of the first base station may form the configuration information of the plurality of second areas of the DU belonging to the first base station into a list of the DU of the first base station, which may be referred to as a multi-cell list 1, and form the configuration information of the plurality of second areas of the DU belonging to the second base station into a list of the DU of the second base station, which may be referred to as a multi-cell list 2.

Step 403a: the CU of the first base station sends a common message 1 to the DU of the first base station.

The common message 1 contains a cell list 1, and the common message 1 is transmitted through an F1 interface.

Step 403b: the CU of the first base station sends a common message 2 to the DU of the second base station.

The common message 2 contains a cell list 2, and the common message 2 is transmitted through an Xn/Mn interface.

Step 404: and the CU of the first base station configures multi-cell MBMS transmission control signaling for the plurality of first cells according to the MBMS service information from the core network and the RRM strategy, and forms corresponding scheduling messages.

405a, the CU of the first base station sends a scheduling message 1 to the DU of the first base station.

The scheduling message 1 may be transmitted through a public message or a private message of the F1 interface, and the message content may be in the form of F1AP IE or RRC container.

It should be noted that step 403a and step 405a may be combined into one step, that is, the CU transmits the common message 1 and the scheduling message 1 simultaneously through one signaling, or may transmit them through two signaling separately.

405b, the CU of the first base station sends a scheduling message 2 to the DU of the second base station.

The scheduling message 2 may be transmitted via a common message or a dedicated message of the Xn/Mn interface.

It should be noted that step 403b and step 405b may be combined into one step, that is, the CU transmits the common message 2 and the scheduling message 2 simultaneously through one signaling, or may transmit them through two signaling separately.

Step 406a: the CU of the first base station may also send MBMS session related information to the DU of the first base station.

Step 406b: the CU of the first base station may also send MBMS session related information to the DU of the second base station.

The session-related information includes, but is not limited to: TMGI + conversation mark, corresponding MBMS service transmission address information, MBMS service area, etc.

It should be noted that, step 405a and step 406a, and step 405b and step 406b may be combined into one step, that is, the CU transmits the scheduling message and the MBMS session related information simultaneously through one signaling, or may transmit the scheduling message and the MBMS session related information separately through two signaling.

Step 407a: the DU of the first base station starts the multi-cell MBMS transmission mode according to the common message 1 and the scheduling message 1.

Step 407b: the DU of the first base station starts the multi-cell MBMS transmission mode according to the common message 2 and the scheduling message 2.

Step 408a: the DU of the first base station sends MBMS specific SIB information 1 to the user terminal.

Step 408b: the DU of the second base station sends MBMS specific SIB information 2 to the user terminal.

The specific SIB information 1 and the specific SIB information 2 each include configuration parameters of a corresponding SC-MCCH.

Step 409a: the DU of the first base station sends the SC-MCCH message 1 at the designated location.

Step 409b: the DU of the second base station sends the SC-MCCH message 2 at the designated location.

Through steps 408a and 409a, steps 408b and 409b, the DU of the first base station and the DU of the second base station may transmit the data of the MBMS service provided by the core network to the user terminal in a multi-cell MBMS service transmission manner.

It should be noted that, in order to simplify the flow, the ue in this embodiment may be understood as a ue in an area where the first base station and the second base station intersect.

Based on the same inventive concept, an embodiment of the present invention provides a device for multi-cell MBMS service transmission, which is applied to a centralized unit CU of a first base station, and a specific implementation of a multi-cell MBMS service transmission method of the device may refer to the description in the method embodiment, and repeated details are not repeated, please refer to fig. 5, where the device includes:

a determining unit 501, configured to determine a plurality of first cells from a plurality of MBMS transmission cells; wherein the plurality of first cells constitute a synchronization area;

a configuration unit 502, configured to determine configuration information of each of the first cells; the configuration information enables a single-cell MBMS service control channel SC-MCCH of each first cell to be located at the same scheduling position;

a transceiver unit 503, configured to send corresponding configuration information to the DU to which each of the first cells belongs, so that all the first cells transmit the same MBMS service according to the corresponding configuration information.

Optionally, the transceiver unit 503 is further configured to:

Optionally, the transceiver unit 503 is specifically configured to:

Based on the same inventive concept, an embodiment of the present invention provides an apparatus for multi-cell MBMS service transmission, which is applied to a distribution unit DU of a first base station, and a specific implementation of a multi-cell MBMS service transmission method of the apparatus may refer to the description of the method embodiment, and repeated details are not repeated, please refer to fig. 6, where the apparatus includes:

a receiving unit 601, configured to receive configuration information of all second cells belonging to the DU, sent by a central unit CU; wherein the configuration information enables the second cell and a single-cell MBMS control channel SC-MCCH of all first cells in a synchronization area to be located at the same scheduling position, the first cells are determined by the CU from a plurality of MBMS transmission cells, and all the second cells are all the first cells or part of all the first cells;

a sending unit 602, configured to transmit the same MBMS service in each second cell according to the configuration information corresponding to each second cell.

Optionally, the sending unit 602 is further configured to:

Optionally, if the number of all the second cells is multiple, receiving configuration information corresponding to the multiple second cells from the CU in a form of a list.

As shown in fig. 7, an apparatus for multi-cell MBMS service transmission according to an embodiment of the present invention is applied to a centralized unit CU of a first base station, and the apparatus includes: a processor 701, a memory 702, and a transceiver 703;

the processor 701 is configured to read a program in the memory 702 and execute the following processes:

Optionally, the processor 701 is further configured to:

The processor 701 is responsible for managing the bus architecture and general processing, and the memory 702 may store data used by the processor 701 in performing operations. The transceiver 703 is used for receiving and transmitting data under the control of the processor 701.

The bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 701, and various circuits, represented by memory 702, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 701 is responsible for managing the bus architecture and general processing, and the memory 702 may store data used by the processor 701 in performing operations.

The process disclosed in the embodiments of the present invention may be applied to the processor 701, or implemented by the processor 701. In implementation, the steps of the signal processing flow may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 701. The processor 701 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor 701. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 702, and the processor 701 reads the information in the memory 702, and completes the steps of the signal processing flow in combination with the hardware thereof.

As shown in fig. 8, an apparatus for multi-cell MBMS service transmission provided in an embodiment of the present invention is applied to a distribution unit DU of a first base station, and the apparatus includes: a processor 801, a memory 802, and a transceiver 803;

the processor 801 is configured to read a program in the memory 802 and execute the following processes:

Optionally, the processor 801 is further configured to:

The processor 801 is responsible for managing the bus architecture and general processing, and the memory 802 may store data used by the processor 801 in performing operations. The transceiver 803 is used for receiving and transmitting data under the control of the processor 801.

The bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by the processor 801, and various circuits, represented by the memory 802, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 801 is responsible for managing the bus architecture and general processing, and the memory 802 may store data used by the processor 801 in performing operations.

The processes disclosed in the embodiments of the present invention can be applied to the processor 801 or implemented by the processor 801. In implementation, the steps of the signal processing flow may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 801. The processor 801 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present invention may be embodied directly in a hardware processor, or in a combination of hardware and software modules within the processor 801. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 802, and the processor 801 reads the information in the memory 802, and completes the steps of the signal processing flow in combination with the hardware thereof.

Based on the same inventive concept, an embodiment of the present invention further provides a readable storage medium, including:

a memory for storing instructions that, when executed by the processor, cause an apparatus comprising the readable storage medium to perform the method for multi-cell MBMS service transmission on a CU side or a DU side as described above.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.

Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method for multi-cell MBMS service transmission is applied to a centralized unit CU, and is characterized by comprising the following steps:

and sending corresponding configuration information to the distribution unit DU to which each first cell belongs, so that all the first cells transmit the same MBMS service according to the corresponding configuration information.

2. The method of claim 1, wherein prior to determining the first plurality of cells from the plurality of MBMS transmission cells, further comprising:

3. The method of claim 2, wherein the MBMS service area information further includes a synchronization area identification.

4. The method of claim 2, wherein receiving MBMS service area information for the plurality of MBMS transmission cells comprises:

5. The method of claim 1, wherein if there are a plurality of second cells in the first cells, the plurality of second cells belonging to the same DU, configuration information corresponding to the plurality of second cells is sent to the DU in a list.

6. The method of claim 1, wherein content transmitted on SC-MCCH of all the first cells comprises a same SC-MTCH configuration list.

7. The method of claim 6, wherein each SC-MTCH corresponds to one Temporary Mobile Group Identity (TMGI) and a session identity (FID), and one group radio network temporary identifier (G-RNTI).

8. The method of claim 6, wherein the SC-MCCHs of all the first cells further comprise a same neighbor cell configuration list; and the adjacent cells in the adjacent cell configuration list are adjacent cells of the synchronization region.

9. The method of claim 1, wherein a repetition period, a modification period, and an offset value, or a signaling modulation and coding Method (MCS) configuration of the SC-MCCHs of all the first cells are the same.

10. A method for multi-cell MBMS service transmission is applied to a distribution unit DU, and is characterized by comprising the following steps:

receiving configuration information of all second cells belonging to the DU, which is sent by a central unit CU; wherein the configuration information enables the second cell and a single-cell MBMS control channel SC-MCCH of all first cells in a synchronization area to be located at the same scheduling position, the first cell is determined by the CU from a plurality of MBMS transmission cells, all the second cells are all the first cells, or all the second cells are partial cells of all the first cells;

11. The method of claim 10, wherein before receiving configuration information sent by a concentration unit CU for all second cells belonging to the DU, further comprising:

12. The method of claim 11, wherein the MBMS service area information further includes a synchronization area identification.

13. The method of claim 11, wherein if the number of all second cells is multiple, receiving configuration information corresponding to the multiple second cells from the CU in a form of a list.

14. The method of claim 10, wherein the DU and the CU belong to a same base station, or wherein the base station to which the DU belongs is a neighboring base station adjacent to a base station including the CU.

15. An apparatus for multi-cell MBMS service transmission, applied to a central unit CU, comprising:

a transceiving unit, configured to send corresponding configuration information to the distribution unit DU to which each of the first cells belongs, so that all the first cells transmit the same MBMS service according to the corresponding configuration information.

16. An apparatus for multi-cell MBMS service transmission, which employs a distribution unit DU, includes:

a receiving unit, configured to receive configuration information of all second cells belonging to the DU, sent by a central unit CU; wherein the configuration information enables the second cell and a single-cell MBMS control channel SC-MCCH of all first cells in a synchronization area to be located at the same scheduling position, the first cell is determined by the CU from a plurality of MBMS transmission cells, all the second cells are all the first cells, or all the second cells are partial cells of all the first cells;

17. An apparatus for multi-cell MBMS service transmission for a central unit CU, the apparatus comprising: a processor, a memory, and a transceiver;

18. The apparatus of claim 17, wherein the processor is further configured to:

19. The apparatus of claim 18, wherein the processor is further configured to:

20. The apparatus of claim 17, wherein if there are a plurality of second cells in the first cells, the plurality of second cells belonging to the same DU, configuration information corresponding to the plurality of second cells is sent to the DU in a list.

21. The apparatus of claim 17, wherein content transmitted on SC-MCCH of all of the first cells comprises a same SC-MTCH configuration list.

22. The apparatus of claim 21, wherein the SC-MCCH of all the first cells further comprises a same neighbor cell configuration list; and the adjacent cells in the adjacent cell configuration list are adjacent cells of the synchronization region.

23. The apparatus of claim 17, wherein a repetition period, a modification period, and an offset value, or a signaling modulation and coding method, MCS, configuration of the SC-MCCH of all the first cells are the same.

24. An apparatus for multi-cell MBMS service transmission, applied to a distribution unit DU, the apparatus comprising: a processor, a memory, and a transceiver;

25. The apparatus of claim 24, wherein the processor is further configured to:

26. The apparatus of claim 25, wherein the MBMS service area information further includes a synchronization area identification.

27. The apparatus of claim 24, wherein the DU and the CU belong to a same base station or the base station to which the DU belongs is a neighboring base station neighboring a base station comprising the CU.

28. A readable storage medium, comprising a memory,

the memory is for storing instructions that, when executed by the processor, cause an apparatus comprising the readable storage medium to perform the method of any of claims 1-14.