CN107241702B

CN107241702B - MBMS service transmission method and device

Info

Publication number: CN107241702B
Application number: CN201610191317.7A
Authority: CN
Inventors: 魏立梅; 袁乃华; 黄杨晖; 周志宏; 高红梅; 魏明华
Original assignee: Chengdu TD Tech Ltd
Current assignee: Chengdu TD Tech Ltd
Priority date: 2016-03-29
Filing date: 2016-03-29
Publication date: 2020-06-16
Anticipated expiration: 2036-03-29
Also published as: CN107241702A

Abstract

The invention provides a transmission method and a transmission device of an MBMS service. The method comprises the following steps: the UE receives the MBMS service and a first neighbor cell list in the current cell, wherein the first neighbor cell list comprises: the MBMS service system comprises at least one adjacent cell supporting the MBMS service, a bearing mode of the MBMS service in the at least one adjacent cell and a simulcast area of the adjacent cell bearing the MBMS service in a simulcast SC-PTM mode, wherein the bearing mode of the MBMS service comprises the simulcast SC-PTM mode and the SC-PTM mode; the UE determines a target cell for cell reselection according to the bearing information of the MBMS service in the current cell and the first neighbor cell list, and the method ensures the continuity of receiving the MBMS service in the moving process of a user on the premise of bearing the MBMS service in a simulcast SC-PTM mode.

Description

MBMS service transmission method and device

Technical Field

The present invention relates to communications technologies, and in particular, to a method and an apparatus for transmitting a Multimedia Broadcast Multicast Service (MBMS) Service.

Background

In a Long Term Evolution (Long Term Evolution, abbreviated as LTE), in order To avoid the problem of air interface resource waste caused by sending an MBMS service in each Cell in the entire MBSFN area in an MBMS Single Frequency Network (MBSFN) manner, an MBMS service is sent in an SC-PTM manner in the LTE system. The SC-PTM mode is to select the cell where the user is located to transmit in a wide MBSFN area only so as to save air interface resources of other cells without users.

The above SC-PTM method is adopted to transmit the MBMS service, although the waste of air interface resources can be avoided, diversity gain cannot be obtained, based on this, it is proposed that for an MBMS service, the service is transmitted in a simulcast SC-PTM method in a hot spot area of the service, that is: each cell in the hot spot area sends the same MBMS service signal by using the same time-frequency resource and the same Modulation and Coding Scheme (MCS for short), so that the user can obtain diversity gain in the hot spot area.

However, in the communication standard of the prior art, how to enable the user to continuously receive the MBMS service in the moving process when the MBMS service is transmitted in the simulcast SC-PTM manner has not been specified yet.

Disclosure of Invention

The embodiment of the invention provides a transmission method and a device of MBMS service, which can ensure that a user can continuously receive the MBMS service in the moving process when the MBMS service is transmitted in a simulcast SC-PTM mode.

A first aspect of the present invention provides a method for transmitting an MBMS service, including:

the method comprises the following steps that UE receives MBMS service and a first neighbor cell list in a current cell, wherein the first neighbor cell list comprises: at least one adjacent cell supporting the MBMS service, a carrying mode of the MBMS service in the at least one adjacent cell, and a simulcast area of the adjacent cell carrying the MBMS service in a simulcast SC-PTM mode, wherein the carrying mode of the MBMS service comprises the simulcast SC-PTM mode and the SC-PTM mode, the simulcast SC-PTM mode is that transmission blocks of the same MBMS service are sent by the same time-frequency resource and the same modulation and coding method MCS in at least one cell, and the area corresponding to the at least one cell is the simulcast area;

the UE determines a target cell for cell reselection according to the bearing information of the MBMS service in the current cell and the first neighbor cell list, wherein the bearing information of the MBMS service in the current cell comprises: if the MBMS service bearer in the current cell is a simulcast SC-PTM mode, the MBMS service bearer information in the current cell further includes: a simulcast area of the current cell.

Optionally, the determining, by the UE, a target cell for cell reselection according to the bearer information of the MBMS service in the current cell and the first neighbor cell list includes:

the UE acquires a first reselection candidate cell list, wherein the first reselection candidate cell list comprises a plurality of reselection candidate cells, and the signal quality of each reselection candidate cell is greater than a first preset value corresponding to the reselection candidate cell;

judging whether the first reselection candidate cell list and the first neighbor cell list have the same cell;

if the first switching candidate cell list and the first neighbor cell list have the same cell, acquiring the target cell according to the first neighbor cell list and the first reselection candidate cell list;

and if the first handover candidate cell list and the first neighbor cell list do not have the same cell, determining the cell with the best signal quality in the first reselection candidate cell list as the target cell.

Optionally, the obtaining the target cell according to the first neighboring cell list and the first reselection candidate cell list includes:

acquiring a second reselection candidate cell list according to the first neighbor cell list and the first reselection candidate cell list, where the second reselection candidate cell list includes multiple first cells and bearer information of each first cell, the first cells are cells included in both the first neighbor cell list and the first reselection candidate cell list, and the bearer information of the first cells is bearer information of the MBMS service corresponding to the first cells in the first neighbor cell list;

and determining the target cell according to the bearing mode of the MBMS service in the current cell and the second reselection candidate cell list.

Optionally, the determining the target cell according to the bearer mode of the MBMS service in the current cell and the second reselection candidate cell list includes:

determining a second cell in the second reselection candidate cell list as the target cell, wherein the second cell is a cell with the best signal quality in cells which have the same simulcast area as the simulcast area of the current cell and support the MBMS service in the second reselection candidate cell list in a simulcast SC-PTM mode;

or the like, or, alternatively,

determining a third cell in the second reselection candidate cell list as the target cell, wherein the third cell is a cell with the best signal quality in cells which have the same broadcast SC-PTM (service continuity-Point multicast) mode as the bearing mode supporting the MBMS service in the second reselection candidate cell list and have different corresponding broadcast areas from the broadcast area corresponding to the current cell; or, the third cell is a cell with the best signal quality in the cells supporting the MBMS service in the second reselection candidate cell list in the SC-PTM manner.

Optionally, after determining that the second cell in the second reselection candidate cell list is the target cell, the method further includes:

and the UE reselects to the second cell and continuously receives the MBMS service in the second cell.

Optionally, after determining that the third cell in the second reselection candidate cell list is the target cell, the method further includes:

the UE reselects to the target cell;

the UE acquires scheduling information of the MBMS in the third cell, wherein the scheduling information comprises: the group radio access network temporary identifier G-RNTI and time domain resource scheduling information of the MBMS service in the third cell;

and the UE continues to receive the MBMS in the third cell according to the scheduling information of the MBMS in the third cell.

the UE sends a unicast establishment request message to a server in the current cell, wherein the unicast establishment request message is used for requesting to establish a unicast bearer of the MBMS between a base station of the current cell and the UE, so that the base station sends the MBMS to the UE through the unicast bearer;

and the UE continues to receive the MBMS sent by the unicast bearer in the current cell.

Optionally, after determining that the cell with the best signal quality in the first reselection candidate cell list is the target cell, the method further includes:

the UE determines a fourth cell in the second reselection candidate cell list as the target cell, wherein the fourth cell is a cell with the best signal quality in cells which support the MBMS service in the second reselection candidate cell list and have a simulcast SC-PTM mode; or, the fourth cell is a cell with the best signal quality in the cells supporting the MBMS service in the second reselection candidate cell list in the SC-PTM manner.

Optionally, after determining that the fourth cell in the second reselection candidate cell list is the target cell, the method further includes:

the UE reselects to the target cell;

the UE acquires scheduling information of the MBMS in the fourth cell, wherein the scheduling information comprises: the group radio access network temporary identifier G-RNTI and time domain resource scheduling information of the MBMS service in the fourth cell;

and the UE continues to receive the MBMS in the fourth cell according to the scheduling information of the MBMS in the fourth cell.

Optionally, the determining, by the UE, a target cell for cell reselection according to the bearer information of the MBMS service in the current cell and the bearer information of the MBMS service in the at least one neighboring cell includes:

the UE judges whether the signal quality of the MBMS received in the current cell is smaller than a second preset value;

and if the UE judges that the signal quality of the MBMS service received in the current cell is less than the second preset value, the UE determines the target cell.

Optionally, the receiving, by the UE, the MBMS service in the current cell includes:

the UE obtains configuration information of a plurality of MBMS services supported by the current cell in the current cell, wherein the configuration information of each MBMS service comprises: the bearing information of the MBMS comprises a bearing mode of the MBMS, and if the bearing mode of the MBMS is a simulcast SC-PTM mode, the bearing information of the MBMS further comprises: and the simulcast area of the current cell, wherein the bearing mode of the MBMS is a simulcast SC-PTM mode or an SC-PTM mode.

A second aspect of the present invention provides a method for transmitting an MBMS service, including:

determining, by a Multi-cell/Multicast Coordination network element (MCE), bearer information of an MBMS service in a current cell, where the bearer information of the MBMS service includes a bearer mode of the MBMS service in the current cell, and if the bearer mode of the MBMS service in the current cell is a simulcast single-cell point-to-multipoint SC-PTM mode, the bearer information of the MBMS service further includes: a simulcast area of the current cell, wherein a carrying mode of the MBMS service is a simulcast SC-PTM mode or an SC-PTM mode, the simulcast SC-PTM mode is that a transport block of the same MBMS service is sent in at least one cell by the same time-frequency resource and the same modulation and coding method MCS, and an area corresponding to the at least one cell is the simulcast area;

the MCE obtains a first neighbor cell list, where the first neighbor cell list includes: at least one adjacent cell supporting the MBMS service, a carrying mode of the MBMS service in the at least one adjacent cell, and a simulcast area of the adjacent cell carrying the MBMS service in a simulcast SC-PTM mode, wherein the carrying mode of the MBMS service comprises the simulcast SC-PTM mode and the SC-PTM mode;

and the MCE sends the bearing information of the MBMS service of the current cell and the first neighbor cell list to a base station.

Optionally, the determining, by the MCE, bearer information of the MBMS service in the current cell includes:

the MCE judges whether the MBMS service already has a simulcast area,

if the MBMS service already has a simulcast area, judging whether the current cell is adjacent to at least one simulcast area of the MBMS service:

if the current cell is not adjacent to any simulcast region of the MBMS, judging whether to newly establish the simulcast region of the MBMS in the current cell;

if the current cell is adjacent to at least one simulcast region of the MBMS service, judging: whether at least one second area exists in at least one first area or not, wherein the time-frequency resource bearing the MBMS service in the second area is idle in the current cell; the first area is: any one simulcasting area in at least one simulcasting area of the MBMS service adjacent to the current cell;

if at least one second area exists in at least one first area, randomly selecting a third area in the at least one second area, determining that the current cell belongs to the third area, determining that the MBMS is carried in the current cell in a simulcast SC-PTM mode, and using time-frequency resources carrying the MBMS in the third area to carry the MBMS in the current cell;

if the time-frequency resource bearing the MBMS service in any one first area is not idle in the current cell, determining that the MBMS service is borne in the current cell in an SC-PTM mode;

if the MBMS does not have the simulcast area, judging whether to newly establish the simulcast area of the MBMS in the current cell;

wherein, the judging whether to newly establish the simulcast area of the MBMS service in the current cell includes:

when the MCE is instructed to bear the MBMS in a plurality of adjacent cells including the current cell and adjacent to the current cell, the MCE determines a simulcasting area for newly building the MBMS and allocates a simulcasting area identifier for the simulcasting area of the newly built MBMS, the simulcasting area of the newly built MBMS comprises the current cell and a plurality of adjacent cells adjacent to the current cell, and the current cell is determined to bear the MBMS in a simulcasting SC-PTM mode;

if the MCE is not indicated to bear the MBMS in a plurality of adjacent cells including the current cell and adjacent to the current cell, the MCE determines to bear the MBMS in the current cell in an SC-PTM mode.

A third aspect of the present invention provides a method for transmitting an MBMS service, including:

a base station receives the bearing information and a first neighbor list of the MBMS service of a current cell sent by a multi-cell/multicast coordination network element MCE, wherein the bearing information of the MBMS service comprises the bearing mode of the MBMS service in the current cell, and if the bearing mode of the MBMS service in the current cell is a simulcast single-cell point-to-multipoint SC-PTM mode, the bearing information of the MBMS service further comprises: the simulcast SC-PTM mode is that the same time-frequency resource and the same modulation and coding method MCS are used for sending the transmission blocks of the same MBMS service in at least one cell, and the area corresponding to the at least one cell is the simulcast area; the first neighbor list comprises: at least one adjacent cell supporting the MBMS service, a carrying mode of the MBMS service in the at least one adjacent cell, and a simulcast area of the adjacent cell carrying the MBMS service in a simulcast SC-PTM mode, wherein the carrying mode of the MBMS service comprises the simulcast SC-PTM mode and the SC-PTM mode;

and the base station sends the bearing information of the MBMS service of the current cell and the first neighbor cell list to the UE in the current cell.

Optionally, the method further includes:

the base station receives the measurement report information of the UE receiving the MBMS through unicast load;

the base station determines a target cell for the UE to perform cell switching according to the bearing information of the MBMS service in the current cell, the first neighbor cell list and the measurement report information of the UE;

and the base station sends the target cell information to the UE.

Optionally, the determining, by the base station, a target cell for cell handover according to the bearer information of the MBMS service in the current cell, the first neighbor cell list, and the measurement report information of the UE includes:

the base station acquires a first switching candidate cell list according to the measurement report information of the UE, wherein the first switching candidate cell list comprises a plurality of switching candidate cells, and the signal quality of each switching candidate cell is greater than a third preset value corresponding to the switching candidate cell;

judging whether the first switching candidate cell list and the first neighbor cell list have the same cell;

if the first switching candidate cell list and the first neighbor cell list have the same cell, acquiring the target cell according to the first neighbor cell list and the first switching candidate cell list;

and if the first switching candidate cell list and the first neighbor cell list do not have the same cell, determining the cell with the best signal quality in the first switching candidate cell list as the target cell.

Optionally, the obtaining the target cell according to the first neighboring cell list and the first handover candidate cell list includes:

acquiring a second handover candidate cell list according to the first neighbor cell list and the first handover candidate cell list, where the second handover candidate cell list includes multiple fifth cells and bearer information of each fifth cell, the fifth cells are cells included in both the first neighbor cell list and the first handover candidate cell list, and the bearer information of the fifth cells is bearer information of the MBMS service corresponding to the fifth cells in the first neighbor cell list;

if the bearing mode of the MBMS service in the current cell is a simulcast SC-PTM mode, determining a sixth cell in the second switching candidate cell list as the target cell, wherein the sixth cell is a cell with the best signal quality in a cell which has the same simulcast area as the simulcast area of the current cell and the bearing mode of the MBMS service in the second switching candidate cell list is the simulcast SC-PTM mode;

or the like, or, alternatively,

if the bearing mode of the MBMS service in the current cell is a simulcast SC-PTM mode, determining a seventh cell in the second switching candidate cell list as the target cell, wherein the seventh cell is a cell with the best signal quality in the cells, of which the bearing mode of the MBMS service in the second switching candidate cell list is the simulcast SC-PTM mode and the corresponding simulcast area is different from the simulcast area corresponding to the current cell; or, the seventh cell is the cell with the best signal quality in the cell supporting the MBMS service in the second handover candidate cell list in the SC-PTM manner or,

if the bearing mode of the MBMS service in the current cell is an SC-PTM mode, the base station determines that an eighth cell in the second switching candidate cell list is the target cell, and the eighth cell is a cell with the best signal quality in a cell which supports the MBMS service in the second switching candidate cell list and has the same broadcast SC-PTM mode; or, the eighth cell is a cell with the best signal quality in the cell in which the bearer mode of the MBMS service in the second handover candidate cell list is the SC-PTM mode.

A fourth aspect of the present invention provides a UE, including:

a receiving module, configured to receive a multimedia broadcast multicast service MBMS service and a first neighbor list in a current cell, where the first neighbor list includes: the MBMS service system comprises at least one adjacent cell supporting the MBMS service, a carrying mode of the MBMS service in the at least one adjacent cell and a simulcasting area of the adjacent cell carrying the MBMS service in a simulcasting single cell point-to-multipoint SC-PTM mode, wherein the carrying mode of the MBMS service comprises a simulcasting SC-PTM mode and an SC-PTM mode, the simulcasting SC-PTM mode is that transmission blocks of the same MBMS service are sent in at least one cell through the same time-frequency resource and the same modulation and coding method MCS, and the area corresponding to the at least one cell is the simulcasting area;

a processing module, configured to determine a target cell for cell reselection according to the bearer information of the MBMS service in the current cell and the first neighbor cell list, where the bearer information of the MBMS service in the current cell includes: if the MBMS service bearer in the current cell is a simulcast SC-PTM mode, the MBMS service bearer information in the current cell further includes: a simulcast area of the current cell.

Optionally, in the aspect that the target cell for cell reselection is determined according to the bearer information of the MBMS service in the current cell and the first neighbor cell list, the processing module is specifically configured to:

the processing module acquires a first reselection candidate cell list, wherein the first reselection candidate cell list comprises a plurality of reselection candidate cells, and the signal quality of each reselection candidate cell is greater than a first preset value corresponding to the reselection candidate cell;

if the first reselection candidate cell list and the first neighbor cell list have the same cell, acquiring the target cell according to the first neighbor cell list and the first reselection candidate cell list;

and if the first reselection candidate cell list and the first neighbor cell list do not have the same cell, determining the cell with the best signal quality in the first reselection candidate cell list as the target cell.

Optionally, in the aspect that the target cell is obtained according to the first neighboring cell list and the first reselection candidate cell list, the processing module is specifically configured to:

Optionally, if the bearer mode of the MBMS service in the current cell is a simulcast SC-PTM mode, in the aspect that the target cell is determined according to the bearer mode of the MBMS service in the current cell and the second reselection candidate cell list, the processing module is specifically configured to:

or the like, or, alternatively,

Optionally, the processing module is further configured to: reselecting the UE to a second cell in the second reselection candidate cell list after determining that the second cell is the target cell;

the receiving module is further configured to: and continuously receiving the MBMS service in the second cell.

Optionally, the processing module is further configured to: reselecting the UE to the target cell after the determining that a third cell in the second reselection candidate cell list is the target cell;

acquiring scheduling information of the MBMS service in the third cell, where the scheduling information includes: the group radio access network temporary identifier G-RNTI and time domain resource scheduling information of the MBMS service in the third cell;

the receiving module is further configured to: and continuously receiving the MBMS in the third cell according to the scheduling information of the MBMS in the third cell.

Optionally, the method further includes: a sending module for sending the data to the receiving module,

the sending module is configured to send, after determining that a third cell in the second reselection candidate cell list is the target cell, a unicast establishment request message to a server in the current cell, where the unicast establishment request message is used to request establishment of a unicast bearer of the MBMS service between a base station of the current cell and the UE, so that the base station sends the MBMS service to the UE in the unicast bearer;

the receiving module is further configured to continue receiving the MBMS service sent by the unicast bearer in the current cell.

Optionally, the sending module is further configured to send, after the cell with the best signal quality in the first reselection candidate cell list is determined to be the target cell, a unicast establishment request message to a server in the current cell, where the unicast establishment request message is used to request establishment of a unicast bearer of the MBMS service between a base station of the current cell and the UE, so that the base station sends the MBMS service to the UE in the unicast bearer;

Optionally, if the bearer mode of the MBMS service in the current cell is an SC-PTM mode, in the aspect of determining the target cell according to the bearer mode of the MBMS service in the current cell and the second reselection candidate cell list, the processing module is specifically configured to:

determining a fourth cell in the second reselection candidate cell list as the target cell, wherein the fourth cell is a cell with the best signal quality in cells supporting the MBMS service in the second reselection candidate cell list in a simulcast SC-PTM mode; or, the fourth cell is a cell with the best signal quality in the cells supporting the MBMS service in the second reselection candidate cell list in the SC-PTM manner.

Optionally, the processing module is further configured to reselect the UE to the target cell after determining that a fourth cell in the second reselection candidate cell list is the target cell;

acquiring scheduling information of the MBMS service in the fourth cell, where the scheduling information includes: the group radio access network temporary identifier G-RNTI and time domain resource scheduling information of the MBMS service in the fourth cell;

the receiving module is further configured to continue receiving the MBMS service in the fourth cell according to the scheduling information of the MBMS service in the fourth cell.

Optionally, the sending module is further configured to send, after determining that a fourth cell in the second reselection candidate cell list is the target cell, a unicast establishment request message to a server in the current cell, where the unicast establishment request message is used to request establishment of a unicast bearer of the MBMS service between a base station of the current cell and the UE, so that the base station sends the MBMS service to the UE in the unicast bearer;

Optionally, in an aspect that a target cell for cell reselection is determined according to the bearer information of the MBMS service in the current cell and the bearer information of the MBMS service in the at least one neighboring cell, the processing module is specifically configured to:

judging whether the signal quality of the MBMS received in the current cell is less than a second preset value; and if the signal quality of the MBMS service received in the current cell is less than the second preset value, determining the target cell.

Optionally, in an aspect that the current cell receives the MBMS service, the receiving module is specifically configured to:

obtaining configuration information of a plurality of MBMS services supported by the current cell in the current cell, wherein the configuration information of each MBMS service comprises: the bearing information of the MBMS comprises a bearing mode of the MBMS, and if the bearing mode of the MBMS is a simulcast SC-PTM mode, the bearing information of the MBMS further comprises: and the simulcast area of the current cell, wherein the bearing mode of the MBMS is a simulcast SC-PTM mode or an SC-PTM mode.

A fifth aspect of the present invention provides an MCE, comprising:

a processing module, configured to determine bearing information of a multimedia broadcast multicast service MBMS service in a current cell, where the bearing information of the MBMS service includes a bearing mode of the MBMS service in the current cell, and if the bearing mode of the MBMS service in the current cell is a simulcast single-cell point-to-multipoint SC-PTM mode, the bearing information of the MBMS service further includes: a simulcast area of the current cell, wherein a carrying mode of the MBMS service is a simulcast SC-PTM mode or an SC-PTM mode, the simulcast SC-PTM mode is that a transport block of the same MBMS service is sent in at least one cell by the same time-frequency resource and the same modulation and coding method MCS, and an area corresponding to the at least one cell is the simulcast area;

a receiving module, configured to obtain a first neighbor list, where the first neighbor list includes: at least one adjacent cell supporting the MBMS service, a carrying mode of the MBMS service in the at least one adjacent cell, and a simulcast area of the adjacent cell carrying the MBMS service in a simulcast SC-PTM mode, wherein the carrying mode of the MBMS service comprises the simulcast SC-PTM mode and the SC-PTM mode;

and the sending module is used for sending the bearing information of the MBMS service of the current cell and the first neighbor cell list to a base station.

Optionally, in the aspect of determining the bearer information of the MBMS service in the current cell, the processing module is specifically configured to:

judging whether the MBMS service already has a simulcast area,

when the MCE is instructed to bear the MBMS in a plurality of adjacent cells including the current cell and adjacent to the current cell, the processing module determines a simulcasting area for newly building the MBMS, and allocates a simulcasting area identifier for the simulcasting area for the newly built MBMS, wherein the simulcasting area for the newly built MBMS comprises the current cell and a plurality of adjacent cells adjacent to the current cell, and the processing module determines that the current cell bears the MBMS in a simulcasting SC-PTM manner;

if the MCE is not indicated to bear the MBMS in a plurality of adjacent cells including the current cell and adjacent to the current cell, the processing module determines to bear the MBMS in the current cell in an SC-PTM mode.

A sixth aspect of the present invention provides a base station, comprising:

a receiving module, configured to receive bearer information of an MBMS service of a current cell and a first neighbor list, where the bearer information of the MBMS service includes a bearer mode of the MBMS service in the current cell, and if the bearer mode of the MBMS service in the current cell is a simulcast single-cell point-to-multipoint SC-PTM mode, the bearer information of the MBMS service further includes: the simulcast SC-PTM mode is that the same time-frequency resource and the same modulation and coding method MCS are used for sending the transmission blocks of the same MBMS service in at least one cell, and the area corresponding to the at least one cell is the simulcast area; the first neighbor list comprises: at least one adjacent cell supporting the MBMS service, a carrying mode of the MBMS service in the at least one adjacent cell, and a simulcast area of the adjacent cell carrying the MBMS service in a simulcast SC-PTM mode, wherein the carrying mode of the MBMS service comprises the simulcast SC-PTM mode and the SC-PTM mode;

and the sending module is used for sending the bearing information of the MBMS service of the current cell and the first neighbor cell list to the UE in the current cell.

Optionally, the method further includes: a processing module for processing the received data,

the receiving module is also used for receiving the measurement report information of the UE receiving the MBMS service through unicast bearing;

the processing module is configured to determine a target cell for cell switching by the UE according to the bearer information of the MBMS service in the current cell, the first neighbor cell list, and the measurement report information of the UE;

the sending module is further configured to send the target cell information to the UE.

Optionally, in an aspect that a target cell for cell handover is determined according to the bearer information of the MBMS service in the current cell, the first neighbor cell list, and the measurement report information of the UE, the processing module is specifically configured to:

acquiring a first handover candidate cell list according to the measurement report information of the UE, wherein the first handover candidate cell list comprises a plurality of handover candidate cells, and the signal quality of each handover candidate cell is greater than a third preset value corresponding to the handover candidate cell;

Optionally, in the aspect that the target cell is obtained according to the first neighboring cell list and the first handover candidate cell list, the processing module is specifically configured to:

or the like, or, alternatively,

if the bearing mode of the MBMS service in the current cell is a simulcast SC-PTM mode, determining a seventh cell in the second switching candidate cell list as the target cell, wherein the seventh cell is a cell with the best signal quality in the cells, of which the bearing mode of the MBMS service in the second switching candidate cell list is the simulcast SC-PTM mode and the corresponding simulcast area is different from the simulcast area corresponding to the current cell; or, the seventh cell is a cell with the best signal quality in the cells supporting the MBMS service in the second handover candidate cell list in the SC-PTM manner;

or the like, or, alternatively,

In the embodiment of the invention, User Equipment (UE) receives MBMS service and a first adjacent cell list in a current cell, wherein the first adjacent cell list comprises: the MBMS service system comprises at least one adjacent cell supporting the MBMS service, a bearing mode of the MBMS service in the at least one adjacent cell and a simulcasting area of the adjacent cell bearing the MBMS service in a simulcasting SC-PTM mode, wherein the bearing mode of the MBMS service comprises the simulcasting SC-PTM mode and the SC-PTM mode, the simulcasting SC-PTM mode is that the same time frequency resource and the same modulation and coding method MCS are used for sending the same transmission blocks of the MBMS service in the at least one cell, and the area corresponding to the at least one cell is the simulcasting area; the UE determines a target cell for cell reselection according to the bearing information of the MBMS service in the current cell and the first neighbor cell list, wherein the bearing information of the MBMS service in the current cell comprises: if the MBMS service bearer in the current cell is a simulcast SC-PTM mode, the bearer information of the MBMS service in the current cell further includes: the simulcast area of the current cell. The method ensures the continuity of receiving the MBMS by the user in the moving process of the user on the premise of bearing the MBMS by the simulcast SC-PTM mode.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a flowchart illustrating a transmission method of an MBMS service according to an embodiment of the present invention;

fig. 2 is a flowchart illustrating a transmission method of an MBMS service according to a second embodiment of the present invention;

fig. 3 is a flowchart illustrating a transmission method of an MBMS service according to a third embodiment of the present invention;

fig. 4 is a schematic structural diagram of a UE according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a UE according to another embodiment of the present invention;

fig. 6 is a schematic structural diagram of an MCE according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a base station according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a base station according to another embodiment of the present invention.

Detailed Description

In an LTE system, MBMS is transmitted in an MBSFN mode: all cells in an MBSFN area transmit the same MBMS service signal through the same Physical broadcast channel (PMCH) in the same MBSFN subframe, so that a user receiving the MBMS service can obtain diversity gain. Specifically, the PMCH uses an extended Cyclic Prefix (CP), a dedicated pilot, and a semi-statically configured MCS, occupies the entire system bandwidth, and transmits the system bandwidth through an antenna port.

In general, users receiving MBMS service in the entire MBSFN area exist only in several cells. Therefore, transmitting MBMS service in the entire MBSFN area wastes air interface resources. In order to solve the problem of air interface resource waste, an SC-PTM mode is introduced to send the MBMS service in the LTE system.

The MBMS service is transmitted in the SC-PTM mode, which has the following advantages:

⑴, it can only select the cell where the user is in a wide MBSFN area to transmit, so as to save the air interface resources of other cells without users;

⑵ Physical Downlink Shared Channel (PDSCH) can adopt transmission diversity transmission mode to obtain transmission diversity gain that can not be obtained by MBMS service single antenna port transmission;

⑶, normal CP can be configured, only Cell Reference Signal (CRS) is adopted without special pilot, which can effectively reduce the consumption of CP and pilot to air interface resource;

⑷ need not be sent over the entire bandwidth, it is possible to employ a cell interference coordination method suitable for PDSCH;

⑸ need not be transmitted in the designated MBSFN sub-frame, so that the MBMS service can share the resource with other LTE public network service in the non-MBSFN sub-frame.

The SC-PTM mode is adopted to transmit the MBMS service, although the resource waste of the MBSFN can be avoided, the diversity gain of the MBSFN can not be obtained by the user.

In practical applications, the group service as a typical MBMS service has such application scenarios: users of a group service are concentrated in adjacent cells. Such as: in a hot spot area with poor peace, coverage is carried out by a plurality of cells. Police patrols are often found in these cells. Group service interaction information is used between the policemen. In the scenario, the same group service data is sent in a plurality of adjacent cells in an SC-PTM mode, and different cells use different air interface resources and MCS to send the same group service. The group users in a certain cell receive the group service signals from different surrounding cells, which are mutually interfered by the same frequency.

In order to solve the problem of co-channel interference when the scene bears the MBMS service in an SC-PTM mode, the inventor provides a simulcast SC-PTM in another patent application by taking the advantage of MBSFN as a reference. For an MBMS service, the service is transmitted in a hot spot area of the service by adopting a simulcast SC-PTM mode, namely: each cell in the hot spot region sends the same MBMS service signal by using the same time-frequency resource and MCS, so that a user can obtain diversity gain in the hot spot region; for cells in non-hotspot regions, such as: there are some cells distributed sporadically for users, and each cell still transmits the MBMS service by SC-PTM, that is: and the cell determines the time-frequency resource and MCS adopted by the service.

In simulcast SC-PTMs, the introduction of simulcast areas indicates the above-mentioned hot spot areas. How to ensure that the UE continuously receives the MBMS service in the simulcasting SC-PTM mode is a problem to be solved.

The introduction of the simulcast SC-PTM mode ensures that MBMS service data from different cells received when UE moves between the edges of two cells in the simulcast area are not mutually interfered with each other any more, but are mutually diversity signals. The diversity reception ensures that the signal quality of the UE is not obviously reduced because the UE moves to the edge of the cell, and the signal quality of the UE is still good at the edge of the cell. Therefore, the physical layer of the UE in the simulcast SC-PTM system does not trigger the application layer of the UE to send a request to a Push-to-Talk key task Server (Mision Critical Push to Talk Server, abbreviated as MCPTT Server) at the edge of the cell. There is no difference between the movement of the UE within the simulcast area and within one cell. However, when the UE moves to the edge of the simulcast area, the UE is subject to the co-channel interference of the cell outside the simulcast area, so that the MBMS service reception quality is deteriorated, and the UE is triggered to send a request to the MCPTT Server. Then, the MCPTT Server establishes a unicast bearer for the UE to transmit the MBMS, and the UE receives the MBMS through the unicast bearer. And when the switching condition is met, the base station switches the unicast bearer of the user from the source cell to the target cell.

The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.

Fig. 1 is a flowchart illustrating a transmission method of an MBMS service according to an embodiment of the present invention, where the method of this embodiment is applied to a UE side, and as shown in fig. 1, the method of this embodiment may include:

step 101: the UE receives the MBMS service and a first neighbor cell list in the current cell, wherein the first neighbor cell list comprises: the MBMS service system comprises at least one adjacent cell supporting the MBMS service, a bearing mode of the MBMS service in the at least one adjacent cell and a simulcasting area of the adjacent cell bearing the MBMS service in a simulcasting SC-PTM mode, wherein the bearing mode of the MBMS service comprises the simulcasting SC-PTM mode and the SC-PTM mode, the simulcasting SC-PTM mode is that the same time frequency resource and the same MCS are used for sending transmission blocks of the same MBMS service in the at least one cell, and the area corresponding to the at least one cell is the simulcasting area;

step 102: the UE determines a target cell for cell reselection according to the bearing information of the MBMS service in the current cell and the first neighbor cell list, wherein the bearing information of the MBMS service in the current cell comprises: if the MBMS service bearer in the current cell is a simulcast SC-PTM mode, the bearer information of the MBMS service in the current cell further includes: the simulcast area of the current cell.

Specifically, the receiving, by the UE, the MBMS service in the current cell includes:

the method comprises the following steps that UE obtains configuration information of a plurality of MBMS services supported by a current cell in the current cell, wherein the configuration information of each MBMS service comprises: the bearing information of the MBMS comprises a bearing mode of the MBMS, and if the bearing mode of the MBMS is a simulcast SC-PTM mode, the bearing information of the MBMS further comprises: and in the simulcast area of the current cell, the bearing mode of the MBMS is a simulcast SC-PTM mode or an SC-PTM mode.

Optionally, the determining, by the UE, the target cell for cell reselection according to the bearer information of the MBMS service in the current cell and the bearer information of the MBMS service in the at least one neighboring cell includes:

the UE judges whether the signal quality of the MBMS received in the current cell is less than a second preset value; and if the UE judges that the signal quality of the MBMS service received in the current cell is less than the second preset value, the UE determines a target cell.

The second preset value is a lower limit value of the signal quality of the MBMS received by the UE, which is preset in advance.

In an implementation manner of the present invention, the UE counts the BLER within a certain time by decoding the MBMS service transport block. And judging the current MBMS quality according to whether the BLER meets the preset MBMS BLER index. When BLER is greater than the BLER indicator, the MBMS service quality is poor.

Further, after the UE determines that the target cell is to be selected, the UE determines, according to the bearer information of the MBMS service in the current cell and the first neighbor cell list, the target cell for cell reselection, including:

the method comprises the steps that UE obtains a first reselection candidate cell list, wherein the first reselection candidate cell list comprises a plurality of reselection candidate cells, and the signal quality of each reselection candidate cell is larger than a first preset value corresponding to the reselection candidate cell;

specifically, the UE measures the signal quality of each neighboring cell, and determines a cell with a signal quality greater than a first preset value to obtain a first reselection candidate cell list, where the first preset value is a lower limit value of the signal quality of a cell selectable by the UE, which is determined according to a cell reselection criterion in a third generation Partnership Project (3 GPP) protocol. The cell reselection criterion in the 3GPP protocol is a public method, and is not described again. The lower limit value is different for different neighbourhoods. Here, the first preset value generally refers to a lower limit value of signal quality of each cell, and does not refer to whether the UE uses the same lower limit value to measure whether surrounding neighboring cells meet cell reselection conditions or not, and whether the neighboring cells can be listed in a first reselection candidate cell list or not. Such as: for neighbor cells 1 and 2, the first preset values may be a and B, respectively, that is: the Reference Signal Received Power (RSRP) of the neighboring cell 1 is higher than a, and then listed in the first reselection candidate cell list, and the RSRP of the neighboring cell 2 is higher than B, and then listed in the first reselection candidate cell list.

if the first reselection candidate cell list and the first neighbor cell list have the same cell, acquiring a target cell according to the first neighbor cell list and the first reselection candidate cell list;

Specifically, the determining whether there is a cell in the first reselection candidate cell list and a cell in the first neighbor cell list that is the same as the cell in the first neighbor cell list may be determining whether there is a cell in the first reselection candidate cell list that is the same as the cell in the first neighbor cell list.

The obtaining of the target cell according to the first neighbor cell list and the first reselection candidate cell list includes:

acquiring a second reselection candidate cell list according to the first neighbor cell list and the first reselection candidate cell list, wherein the second reselection candidate cell list comprises a plurality of first cells and bearing information of each first cell, the first cells are cells contained in the first neighbor cell list and the first reselection candidate cell list, and the bearing information of the first cells is the bearing information of the corresponding MBMS service of the first cells in the first neighbor cell list;

Optionally, if the bearer mode of the MBMS service in the current cell is a simulcast SC-PTM mode, determining the target cell according to the bearer mode of the MBMS service in the current cell and the second reselected candidate cell list includes:

determining a second cell in the second reselection candidate cell list as a target cell, wherein the second cell is a cell with the best signal quality in cells which have the same simulcast area as the simulcast area of the current cell and support the MBMS service in the second reselection candidate cell list in a simulcast SC-PTM mode;

after determining that the second cell in the second reselection candidate cell list is the target cell, the method further includes: and the UE reselects to the second cell and continuously receives the MBMS service in the second cell.

determining a third cell in the second reselection candidate cell list as a target cell, wherein the third cell is a cell with the best signal quality in cells which have the same broadcast SC-PTM (single carrier-packet transport protocol) mode supporting the MBMS service in the second reselection candidate cell list and have different corresponding broadcast areas from the broadcast area corresponding to the current cell; or, the third cell is the cell with the best signal quality in the cell supporting the MBMS service in the second reselection candidate cell list in the SC-PTM manner.

After determining that the third cell in the second reselection candidate cell list is the target cell, the method further includes:

UE reselects to a target cell;

the UE acquires scheduling information of the MBMS in the third cell, wherein the scheduling information comprises: a group radio access network temporary identifier G-RNTI and time domain resource scheduling information of the MBMS service in the third cell;

Specifically, the UE acquires an SC-MCCH corresponding to the third cell in the third cell, acquires scheduling information of the MBMS in the third cell from the SC-MCCH, receives the PDCCH scrambled by the G-RNTI in the second configuration information in a subframe indicated by the time domain resource scheduling information, receives the PDSCH in the same subframe according to the monitored scheduling information on the PDCCH scrambled by the G-RNTI, and acquires data of the MBMS in the third cell by decoding a transmission block on the PDSCH.

The UE may also read the system message of the third cell by using the configured measurement time before reselecting to the third cell, so that the SC-MCCH may be directly acquired after reselecting to the third cell, thereby reducing the access delay.

the method comprises the steps that UE sends a unicast establishment request message to a server in a current cell, wherein the unicast establishment request message is used for requesting to establish unicast bearing of MBMS between a base station of the current cell and the UE, so that the base station sends the MBMS to the UE in the unicast bearing mode;

Further, after determining that the cell with the best signal quality in the first reselection candidate cell list is the target cell, the method further includes:

Optionally, if the bearer mode of the MBMS service in the current cell is the SC-PTM mode, determining the target cell according to the bearer mode of the MBMS service in the current cell and the second reselection candidate cell list includes:

the UE determines a fourth cell in the second reselection candidate cell list as a target cell, and the fourth cell is a cell with the best signal quality in cells which support the MBMS service in the second reselection candidate cell list and have a simulcast SC-PTM mode; or, the fourth cell is the cell with the best signal quality in the cell supporting the MBMS service in the second reselection candidate cell list in the SC-PTM manner.

In an implementation manner of the present invention, after determining that the fourth cell in the second reselection candidate cell list is the target cell, the method further includes:

UE reselects to a target cell; the UE acquires scheduling information of the MBMS in the fourth cell, wherein the scheduling information comprises: a group radio access network temporary identifier G-RNTI and time domain resource scheduling information of the MBMS service in the fourth cell; and the UE continues to receive the MBMS in the fourth cell according to the scheduling information of the MBMS in the fourth cell.

The implementation manner of reselecting the UE to the fourth cell is the same as that of switching the UE to the third cell, and is not described herein again.

In another implementation manner of the present invention, after determining that the fourth cell in the second reselection candidate cell list is the target cell, the method further includes:

In this embodiment, a manner that the UE selects the MBMS service to be received in the current cell is the same as that in the prior art, the UE selects the MBMS service to be received by itself according to an interest among a plurality of different MBMS services supported by the current cell, then monitors a PDCCH scrambled with a G-RNTI of the MBMS service selected by itself in a subframe indicated by scheduling information of the MBMS service selected by itself, receives a PDSCH in the same subframe according to the monitored scheduling information on the PDCCH scrambled with the G-RNTI of the MBMS service selected by itself, and obtains data of the MBMS service selected by itself by decoding a transport block on the PDSCH.

In this embodiment, the target cell reselected by the UE and the method for switching the UE to the target cell are the same as those in the prior art, and are not described herein again.

In this embodiment, because the MBMS service is supported by adding a simulcast SC-PTM method, when a reselected target cell or a switched target cell is selected for a UE, a cell with the best signal quality among cells belonging to the same simulcast cell is preferentially selected as the target cell, so that the UE can receive the MBMS service on the same air interface resource uninterruptedly during the process of reselecting the cell, and the MBMS service is uninterrupted; when there is no cell belonging to the same simulcasting area with the current cell, the UE selects the cell with the best signal quality as the target cell in the simulcasting SC-PTM mode as the bearing mode of the MBMS service; and when no cell belongs to the same simulcasting area with the current cell and each adjacent cell does not support the transmission block for bearing the MBMS in a simulcasting SC-PTM mode, selecting the cell with the best signal quality as the target cell in the cell which supports the MBMS in the SC-PTM mode.

The embodiment of the invention provides a transmission method of an MBMS service, which comprises the following steps: user Equipment (UE) receives an MBMS service and a first neighbor cell list in a current cell, wherein the first neighbor cell list comprises: the MBMS service system comprises at least one adjacent cell supporting the MBMS service, a bearing mode of the MBMS service in the at least one adjacent cell and a simulcasting area of the adjacent cell bearing the MBMS service in a simulcasting SC-PTM mode, wherein the bearing mode of the MBMS service comprises the simulcasting SC-PTM mode and the SC-PTM mode, the simulcasting SC-PTM mode is that transmission blocks of the same MBMS service are sent in the at least one cell through the same time-frequency resource and MCS, and the area corresponding to the at least one cell is the simulcasting area; the UE determines a target cell for cell reselection according to the bearing information of the MBMS service in the current cell and the first neighbor cell list, wherein the bearing information of the MBMS service in the current cell comprises: if the MBMS service bearer in the current cell is a simulcast SC-PTM mode, the bearer information of the MBMS service in the current cell further includes: the simulcast area of the current cell. The method ensures the continuity of receiving the MBMS by the user in the moving process of the user on the premise of bearing the MBMS by the simulcast SC-PTM mode.

Fig. 2 is a flowchart illustrating a transmission method of an MBMS service according to a second embodiment of the present invention, where as shown in fig. 2, the method in this embodiment may include:

step 201: the multi-cell/multicast coordination network element MCE determines the bearing information of the MBMS service in the current cell, the bearing information of the MBMS service comprises the bearing mode of the MBMS service in the current cell, if the bearing mode of the MBMS service in the current cell is a simulcast single-cell point-to-multipoint SC-PTM mode, the bearing information of the MBMS service further comprises: a simulcasting area of the current cell, wherein the bearing mode of the MBMS is a simulcasting SC-PTM mode or an SC-PTM mode, the simulcasting SC-PTM mode is that the same time-frequency resource and the same modulation and coding method MCS are used for sending the same transmission block of the MBMS in at least one cell, and the area corresponding to at least one cell is the simulcasting area;

step 202: the MCE acquires a first neighbor cell list, wherein the first neighbor cell list comprises: the MBMS service system comprises at least one adjacent cell supporting the MBMS service, a bearing mode of the MBMS service in the at least one adjacent cell and a simulcast area of the adjacent cell bearing the MBMS service in a simulcast SC-PTM mode, wherein the bearing mode of the MBMS service comprises the simulcast SC-PTM mode and the SC-PTM mode;

step 203: and the MCE sends the bearing information of the MBMS service of the current cell and the first neighbor cell list to the base station.

Further, the MCE determines the bearer information of the MBMS service in the current cell, including:

the MCE determines whether the MBMS service already exists in the simulcast area,

the judging whether a simulcast area of the MBMS service is newly established in the current cell or not comprises the following steps:

when the MCE is indicated to bear the MBMS in a plurality of adjacent cells including a current cell and adjacent to the current cell, the MCE determines a simulcasting area of a newly-built MBMS and distributes a simulcasting area identifier for the simulcasting area of the newly-built MBMS, the simulcasting area of the newly-built MBMS comprises the current cell and a plurality of adjacent cells adjacent to the current cell, and the current cell is determined to bear the MBMS in a simulcasting SC-PTM mode;

if the MCE is not indicated to bear the MBMS service in a plurality of adjacent cells including the current cell and adjacent to the current cell, the MCE determines to bear the MBMS service in the current cell in an SC-PTM mode.

In the embodiment of the present invention, the MCE determines the bearer information of the MBMS service in the current cell, the bearer information of the MBMS service includes a bearer mode of the MBMS service in the current cell, and if the bearer mode of the MBMS service in the current cell is a simulcast SC-PTM mode, the bearer information of the MBMS service further includes: a simulcast area of a current cell, wherein the bearing mode of the MBMS is a simulcast SC-PTM mode or an SC-PTM mode, the simulcast SC-PTM mode is that the transmission blocks of the same MBMS are sent by the same time-frequency resource and MCS in at least one cell, and the area corresponding to at least one cell is the simulcast area; then, the MCE obtains a first neighbor cell list, where the first neighbor cell list includes: the MBMS service system comprises at least one adjacent cell supporting the MBMS service, a bearing mode of the MBMS service in the at least one adjacent cell and a simulcast area of the adjacent cell bearing the MBMS service in a simulcast SC-PTM mode, wherein the bearing mode of the MBMS service comprises the simulcast SC-PTM mode and the SC-PTM mode; and finally, the MCE sends the bearing information of the MBMS service of the current cell and the first neighbor cell list to the base station.

So that User Equipment (UE) receives MBMS service and a first neighbor cell list in a current cell, wherein the first neighbor cell list comprises: the MBMS service system comprises at least one adjacent cell supporting the MBMS service, a bearing mode of the MBMS service in the at least one adjacent cell and a simulcasting area of the adjacent cell bearing the MBMS service in a simulcasting SC-PTM mode, wherein the bearing mode of the MBMS service comprises the simulcasting SC-PTM mode and the SC-PTM mode, the simulcasting SC-PTM mode is that transmission blocks of the same MBMS service are sent in the at least one cell through the same time-frequency resource and MCS, and the area corresponding to the at least one cell is the simulcasting area; the UE determines a target cell for cell reselection according to the bearing information of the MBMS service in the current cell and the first neighbor cell list, wherein the bearing information of the MBMS service in the current cell comprises: if the MBMS service bearer in the current cell is a simulcast SC-PTM mode, the bearer information of the MBMS service in the current cell further includes: the simulcast area of the current cell. The method ensures the continuity of receiving the MBMS by the user in the moving process of the user on the premise of bearing the MBMS by the simulcast SC-PTM mode.

Fig. 3 is a flowchart illustrating a transmission method of an MBMS service according to a third embodiment of the present invention, where as shown in fig. 3, the method according to the present embodiment may include:

step 301: the base station receives the bearing information of the MBMS service of the current cell and a first neighbor cell list which are sent by a multi-cell/multicast coordination network element MCE, the bearing information of the MBMS service comprises a bearing mode of the MBMS service in the current cell, if the bearing mode of the MBMS service in the current cell is a simulcast SC-PTM mode, the bearing information of the MBMS service also comprises: in the simulcast area of the current cell, the simulcast SC-PTM mode is that the transmission blocks of the same MBMS service are sent in at least one cell through the same time-frequency resource and MCS, and the area corresponding to at least one cell is the simulcast area; the first neighbor list comprises: the MBMS service system comprises at least one adjacent cell supporting the MBMS service, a bearing mode of the MBMS service in the at least one adjacent cell and a simulcast area of the adjacent cell bearing the MBMS service in a simulcast SC-PTM mode, wherein the bearing mode of the MBMS service comprises the simulcast SC-PTM mode and the SC-PTM mode;

step 302: and the base station sends the bearing information of the MBMS service of the current cell and the first neighbor cell list to the UE in the current cell.

Further, the base station receives the measurement report information of the UE receiving the MBMS through unicast load;

and the base station sends the target cell information to the UE.

The measurement report information of the UE is the same as the information reported by the UE in the existing standard, and is not described herein again.

Optionally, the determining, by the base station, the target cell for cell handover according to the bearer information of the MBMS service in the current cell, the first neighbor cell list, and the measurement report information of the UE includes:

a base station acquires a first switching candidate cell list according to measurement report information of UE, wherein the first switching candidate cell list comprises a plurality of switching candidate cells, and the signal quality of each switching candidate cell is greater than a third preset value corresponding to the switching candidate cell;

various methods for determining the third preset value in various switching algorithm documents are numerous and are not described in detail. The third preset value may be different for different neighboring cells. Here, the third preset value generally refers to a lower limit value of signal quality of each cell, and does not refer to whether the UE uses the same lower limit value to measure whether surrounding neighboring cells meet handover conditions or not, and whether the neighboring cells can be listed in the first handover candidate cell list or not. Such as: for neighbor cells 1 and 2, the third preset values may be C and D, respectively, that is: the RSRP or Reference Signal Received Quality (RSRQ) of the neighboring cell 1 is higher than C and meets the requirement, and can be listed as the first handover candidate cell list, and the RSRP or RSRQ of the neighboring cell 2 is higher than D and meets the requirement. RSRP or RSRP is a measure of the received quality of a signal.

Judging whether the first switching candidate cell list and the first adjacent cell list have the same cell;

if the first switching candidate cell list and the first neighbor cell list have the same cells, acquiring a target cell according to the first neighbor cell list and the first switching candidate cell list;

and if the first switching candidate cell list and the first adjacent cell list do not have the same cell, determining the cell with the best signal quality in the first switching candidate cell list as a target cell.

In an implementation manner of the present invention, acquiring a target cell according to a first neighbor cell list and a first handover candidate cell list includes:

acquiring a second switching candidate cell list according to the first neighbor cell list and the first switching candidate cell list, wherein the second switching candidate cell list comprises a plurality of fifth cells and bearing information of each fifth cell, the fifth cells are cells contained in the first neighbor cell list and the first switching candidate cell list, and the bearing information of the fifth cells is the bearing information of the MBMS corresponding to the fifth cells in the first neighbor cell list;

if the bearing mode of the MBMS service in the current cell is a simulcast SC-PTM mode, determining a sixth cell in a second switching candidate cell list as a target cell, wherein the sixth cell is a cell with the best signal quality in a cell which has the same simulcast area as the simulcast area of the current cell and the bearing mode of the MBMS service in the second switching candidate cell list is the simulcast SC-PTM mode;

in another implementation manner of the present invention, acquiring a target cell according to a first neighbor cell list and a first handover candidate cell list includes:

if the bearing mode of the MBMS service in the current cell is a simulcast SC-PTM mode, determining a seventh cell in a second switching candidate cell list as a target cell, wherein the seventh cell is a cell with the best signal quality in cells, the bearing mode of the MBMS service in the second switching candidate cell list is the simulcast SC-PTM mode, and a corresponding simulcast area is different from the simulcast area corresponding to the current cell; or, the seventh cell is the cell with the best signal quality in the cell supporting the MBMS service in the second handover candidate cell list in the SC-PTM bearer mode.

In another implementation manner of the present invention, acquiring a target cell according to a first neighbor cell list and a first handover candidate cell list includes: acquiring a second switching candidate cell list according to the first neighbor cell list and the first switching candidate cell list, wherein the second switching candidate cell list comprises a plurality of fifth cells and bearing information of each fifth cell, the fifth cells are cells contained in the first neighbor cell list and the first switching candidate cell list, and the bearing information of the fifth cells is the bearing information of the MBMS corresponding to the fifth cells in the first neighbor cell list;

In the embodiment of the present invention, a base station receives the bearer information of the MBMS service of a current cell and a first neighbor list, which are sent by an MCE, where the bearer information of the MBMS service includes a bearer mode of the MBMS service in the current cell, and if the bearer mode of the MBMS service in the current cell is a simulcast SC-PTM mode, the bearer information of the MBMS service further includes: in the simulcast area of the current cell, the simulcast SC-PTM mode is that the transmission blocks of the same MBMS service are sent in at least one cell through the same time-frequency resource and MCS, and the area corresponding to at least one cell is the simulcast area; the first neighbor list comprises: the MBMS service system comprises at least one adjacent cell supporting the MBMS service, a bearing mode of the MBMS service in the at least one adjacent cell and a simulcast area of the adjacent cell bearing the MBMS service in a simulcast SC-PTM mode, wherein the bearing mode of the MBMS service comprises the simulcast SC-PTM mode and the SC-PTM mode; then, the base station sends the bearing information of the MBMS service of the current cell and the first neighbor cell list to the UE in the current cell.

Fig. 4 is a schematic structural diagram of a UE according to an embodiment of the present invention, and as shown in fig. 4, the apparatus according to this embodiment may include: a receiving module 11 and a processing module 12,

the receiving module 11 is configured to receive a multimedia broadcast multicast service MBMS service and a first neighbor list in a current cell, where the first neighbor list includes: the MBMS service system comprises at least one adjacent cell supporting the MBMS service, a carrying mode of the MBMS service in the at least one adjacent cell and a simulcasting area of the adjacent cell carrying the MBMS service in a simulcasting single cell point-to-multipoint SC-PTM mode, wherein the carrying mode of the MBMS service comprises a simulcasting SC-PTM mode and an SC-PTM mode, the simulcasting SC-PTM mode is that transmission blocks of the same MBMS service are sent in at least one cell through the same time-frequency resource and the same modulation and coding method MCS, and the area corresponding to the at least one cell is the simulcasting area;

a processing module 12, configured to determine a target cell for cell reselection according to the bearer information of the MBMS service in the current cell and the first neighbor cell list, where the bearer information of the MBMS service in the current cell includes: if the MBMS service bearer in the current cell is a simulcast SC-PTM mode, the MBMS service bearer information in the current cell further includes: a simulcast area of the current cell.

Optionally, in the aspect that the target cell for cell reselection is determined according to the bearer information of the MBMS service in the current cell and the first neighbor cell list, the processing module 12 is specifically configured to:

the processing module 12 obtains a first reselection candidate cell list, where the first reselection candidate cell list includes multiple reselection candidate cells, and a signal quality of each reselection candidate cell is greater than a first preset value corresponding to the reselection candidate cell;

if the first reselection candidate cell list and the first neighbor cell list do not have the same cell, determining that the cell with the best signal quality in the first reselection candidate cell list is the target cell.

Optionally, in the aspect of obtaining the target cell according to the first neighboring cell list and the first reselection candidate cell list, the processing module 12 is specifically configured to:

Optionally, if the bearer mode of the MBMS service in the current cell is a simulcast SC-PTM mode, in the aspect that the target cell is determined according to the bearer mode of the MBMS service in the current cell and the second reselection candidate cell list, the processing module 12 is specifically configured to:

or the like, or, alternatively,

Optionally, the processing module 12 is further configured to: reselecting the UE to a second cell in the second reselection candidate cell list after determining that the second cell is the target cell;

the receiving module 11 is further configured to: and continuously receiving the MBMS service in the second cell.

Optionally, the processing module 12 is further configured to: reselecting the UE to the target cell after the determining that a third cell in the second reselection candidate cell list is the target cell;

the receiving module 11 is further configured to: and continuously receiving the MBMS in the third cell according to the scheduling information of the MBMS in the third cell.

Optionally, as shown in fig. 5, the UE further includes: the sending module 13 is used for sending out the data,

the sending module 13 is configured to send, after determining that a third cell in the second reselection candidate cell list is the target cell, a unicast establishment request message to a server in the current cell, where the unicast establishment request message is used to request establishment of a unicast bearer of the MBMS service between a base station of the current cell and the UE, so that the base station sends the MBMS service to the UE in the unicast bearer;

the receiving module 11 is further configured to continue receiving, in the current cell, the MBMS service sent by the unicast bearer.

Optionally, the sending module 13 is further configured to, after determining that the cell with the best signal quality in the first reselection candidate cell list is the target cell, send a unicast establishment request message to a server in the current cell, where the unicast establishment request message is used to request establishment of a unicast bearer of the MBMS service between a base station of the current cell and the UE, so that the base station sends the MBMS service to the UE in the unicast bearer;

Optionally, if the bearer mode of the MBMS service in the current cell is an SC-PTM mode, in the aspect of determining the target cell according to the bearer mode of the MBMS service in the current cell and the second reselection candidate cell list, the processing module 12 is specifically configured to:

Optionally, the processing module 12 is further configured to reselect the UE to the target cell after determining that a fourth cell in the second reselection candidate cell list is the target cell;

the receiving module 11 is further configured to continue receiving the MBMS service in the fourth cell according to the scheduling information of the MBMS service in the fourth cell.

Optionally, the sending module 13 is further configured to send, after the fourth cell in the second reselection candidate cell list is determined to be the target cell, a unicast establishment request message to a server in the current cell, where the unicast establishment request message is used to request establishment of a unicast bearer of the MBMS service between a base station of the current cell and the UE, so that the base station sends the MBMS service to the UE in the unicast bearer;

Optionally, in an aspect that a target cell for cell reselection is determined according to the bearer information of the MBMS service in the current cell and the bearer information of the MBMS service in the at least one neighboring cell, the processing module 12 is specifically configured to:

judging whether the signal quality of the MBMS received in the current cell is less than a second preset value; and if the signal quality of the MBMS received in the current cell is judged to be less than a second preset value, determining the target cell.

Optionally, in an aspect that the current cell receives the MBMS service, the receiving module 11 is specifically configured to:

The apparatus of this embodiment may be used to implement the technical solution of the method embodiment shown in fig. 1, and the implementation principle and the technical effect are similar, which are not described herein again.

Fig. 6 is a schematic structural diagram of an MCE according to an embodiment of the present invention, and as shown in fig. 6, the apparatus according to the embodiment may include: a processing module 21, a receiving module 22 and a sending module 23,

a processing module 21, configured to determine bearing information of a multimedia broadcast multicast service MBMS service in a current cell, where the bearing information of the MBMS service includes a bearing mode of the MBMS service in the current cell, and if the bearing mode of the MBMS service in the current cell is a simulcast single-cell point-to-multipoint SC-PTM mode, the bearing information of the MBMS service further includes: a simulcast area of the current cell, wherein a carrying mode of the MBMS service is a simulcast SC-PTM mode or an SC-PTM mode, the simulcast SC-PTM mode is that a transport block of the same MBMS service is sent in at least one cell by the same time-frequency resource and the same modulation and coding method MCS, and an area corresponding to the at least one cell is the simulcast area;

a receiving module 22, configured to obtain a first neighbor list, where the first neighbor list includes: at least one adjacent cell supporting the MBMS service, a carrying mode of the MBMS service in the at least one adjacent cell, and a simulcast area of the adjacent cell carrying the MBMS service in a simulcast SC-PTM mode, wherein the carrying mode of the MBMS service comprises the simulcast SC-PTM mode and the SC-PTM mode;

a sending module 23, configured to send, to a base station, the bearer information of the MBMS service of the current cell and the first neighbor cell list.

Optionally, in terms of determining the bearer information of the MBMS service in the current cell, the processing module 21 is specifically configured to:

judging whether the MBMS service already has a simulcast area,

when the MCE is instructed to carry the MBMS service in the neighboring cells including the current cell and neighboring cells neighboring the current cell, the processing module 21 determines a simulcast area in which the MBMS service is newly created, and allocates a simulcast area identifier to the simulcast area in which the MBMS service is newly created, where the simulcast area in which the MBMS service is newly created includes the current cell and neighboring cells neighboring the current cell, and determines that the current cell carries the MBMS service in a simulcast SC-PTM manner;

if the MCE is not indicated to carry the MBMS service in the neighboring cells including the current cell and neighboring cells to the current cell, the processing module 21 determines to carry the MBMS service in the current cell in an SC-PTM manner.

The apparatus of this embodiment may be used to implement the technical solution of the method embodiment shown in fig. 2, and the implementation principle and the technical effect are similar, which are not described herein again.

Fig. 7 is a schematic structural diagram of a base station according to an embodiment of the present invention, and as shown in fig. 7, the apparatus according to this embodiment may include: a receiving module 31 and a sending module 32,

a receiving module 31, configured to receive bearer information of an MBMS service of a current cell and a first neighbor list, where the bearer information of the MBMS service includes a bearer mode of the MBMS service in the current cell, and if the bearer mode of the MBMS service in the current cell is a simulcast single-cell peer-to-multipoint SC-PTM mode, the bearer information of the MBMS service further includes: the simulcast SC-PTM mode is that the same time-frequency resource and the same modulation and coding method MCS are used for sending the transmission blocks of the same MBMS service in at least one cell, and the area corresponding to the at least one cell is the simulcast area; the first neighbor list comprises: at least one adjacent cell supporting the MBMS service, a carrying mode of the MBMS service in the at least one adjacent cell, and a simulcast area of the adjacent cell carrying the MBMS service in a simulcast SC-PTM mode, wherein the carrying mode of the MBMS service comprises the simulcast SC-PTM mode and the SC-PTM mode;

a sending module 32, configured to send the bearer information of the MBMS service of the current cell and the first neighboring cell list to the UE in the current cell.

Optionally, as shown in fig. 8, the base station further includes: the processing module 33 is used to process the data,

the receiving module 31 is further configured to receive measurement report information of a UE that receives the MBMS service through a unicast bearer;

the processing module 33 is configured to determine a target cell for cell switching by the UE according to the bearer information of the MBMS service in the current cell, the first neighbor cell list, and the measurement report information of the UE;

the sending module 32 is further configured to send the target cell information to the UE.

Optionally, in an aspect that a target cell for cell handover is determined according to the bearer information of the MBMS service in the current cell, the first neighbor cell list, and the measurement report information of the UE, the processing module 33 is specifically configured to:

Optionally, in the aspect that the target cell is obtained according to the first neighboring cell list and the first handover candidate cell list, the processing module 33 is specifically configured to:

or the like, or, alternatively,

The apparatus of this embodiment may be used to implement the technical solution of the method embodiment shown in fig. 3, and the implementation principle and the technical effect are similar, which are not described herein again.

Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media capable of storing program codes, such as Read-Only Memory (ROM), Random Access Memory (RAM), magnetic disk, and optical disk.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A transmission method of Multimedia Broadcast Multicast Service (MBMS) is characterized by comprising the following steps:

user Equipment (UE) receives an MBMS service and a first neighbor cell list in a current cell, wherein the first neighbor cell list comprises: the MBMS service system comprises at least one adjacent cell supporting the MBMS service, a carrying mode of the MBMS service in the at least one adjacent cell and a simulcasting area of the adjacent cell carrying the MBMS service in a simulcasting single cell point-to-multipoint SC-PTM mode, wherein the carrying mode of the MBMS service comprises a simulcasting SC-PTM mode and an SC-PTM mode, the simulcasting SC-PTM mode is that transmission blocks of the same MBMS service are sent in at least one cell through the same time-frequency resource and the same modulation and coding method MCS, and the area corresponding to the at least one cell is the simulcasting area;

2. The method of claim 1, wherein the determining, by the UE, a target cell for cell reselection according to the bearer information of the MBMS service in the current cell and the first neighbor cell list, comprises:

3. The method of claim 2, wherein the obtaining the target cell according to the first neighbor cell list and the first reselection candidate cell list comprises:

4. The method of claim 3, wherein the MBMS service bearer in the current cell is a simulcast SC-PTM mode, and wherein the determining the target cell according to the MBMS service bearer in the current cell and the second reselection candidate cell list comprises:

or the like, or, alternatively,

5. The method of claim 4, wherein after determining that the second cell in the second reselection candidate cell list is the target cell, further comprising:

6. The method of claim 4, wherein after determining that the third cell in the second reselection candidate cell list is the target cell, further comprising:

the UE reselects to the target cell;

7. The method of claim 4, wherein after determining that the third cell in the second reselection candidate cell list is the target cell, further comprising:

8. The method of claim 2, wherein after determining that the cell with the best signal quality in the first reselection candidate cell list is the target cell, the method further comprises:

9. The method of claim 3, wherein the MBMS service bearer in the current cell is an SC-PTM, and wherein the determining the target cell according to the MBMS service bearer in the current cell and the second reselection candidate cell list comprises:

10. The method of claim 9, wherein after determining that the fourth cell in the second reselection candidate cell list is the target cell, further comprising:

the UE reselects to the target cell;

11. The method of claim 9, wherein after determining that the fourth cell in the second reselection candidate cell list is the target cell, further comprising:

12. The method according to any of claims 1 to 11, wherein the determining, by the UE, the target cell for cell reselection according to the bearer information of the MBMS service in the current cell and the bearer information of the MBMS service in the at least one neighboring cell, comprises:

13. The method of claim 12, wherein the UE receives the MBMS service in the current cell, and wherein the method comprises:

14. A transmission method of Multimedia Broadcast Multicast Service (MBMS) is characterized by comprising the following steps:

the multi-cell/multicast coordination network element MCE determines the bearing information of the MBMS in the current cell, the bearing information of the MBMS comprises the bearing mode of the MBMS in the current cell, if the bearing mode of the MBMS in the current cell is a simulcast single-cell point-to-multipoint SC-PTM mode, the bearing information of the MBMS further comprises: a simulcast area of the current cell, wherein a carrying mode of the MBMS service is a simulcast SC-PTM mode or an SC-PTM mode, the simulcast SC-PTM mode is that a transport block of the same MBMS service is sent in at least one cell by the same time-frequency resource and the same modulation and coding method MCS, and an area corresponding to the at least one cell is the simulcast area;

15. The method of claim 14, wherein the MCE determines bearer information of the MBMS service in the current cell, including:

the MCE judges whether the MBMS service already has a simulcast area,

16. A transmission method of Multimedia Broadcast Multicast Service (MBMS) is characterized by comprising the following steps:

17. The method of claim 16, further comprising:

the base station receives measurement report information of User Equipment (UE) receiving the MBMS through unicast load;

and the base station sends the target cell information to the UE.

18. The method of claim 17, wherein the determining, by the base station, the target cell for cell handover according to the bearer information of the MBMS service in the current cell, the first neighbor cell list, and the measurement report information of the UE, comprises:

19. The method of claim 18, wherein the obtaining the target cell according to the first neighbor cell list and the first handover candidate cell list comprises:

or the like, or, alternatively,

20. A User Equipment (UE), comprising:

21. The UE of claim 20, wherein, in the aspect that the target cell for cell reselection is determined according to the bearer information of the MBMS service in the current cell and the first neighbor cell list, the processing module is specifically configured to:

22. The UE of claim 21, wherein, in terms of the obtaining the target cell according to the first neighbor cell list and the first reselection candidate cell list, the processing module is specifically configured to:

23. The UE of claim 22, wherein if the MBMS service bearer in the current cell is a simulcast SC-PTM mode, in the aspect of determining the target cell according to the MBMS service bearer in the current cell and the second reselection candidate cell list, the processing module is specifically configured to:

or the like, or, alternatively,

24. The UE of claim 23, wherein the processing module is further configured to: reselecting the UE to a second cell in the second reselection candidate cell list after determining that the second cell is the target cell;

25. The UE of claim 23, wherein the processing module is further configured to: reselecting the UE to the target cell after the determining that a third cell in the second reselection candidate cell list is the target cell;

26. The UE of claim 23, further comprising: a sending module for sending the data to the receiving module,

27. The UE of claim 26, wherein the sending module is further configured to send a unicast establishment request message to a server in the current cell after the determination that the cell with the best signal quality in the first reselection candidate cell list is the target cell, where the unicast establishment request message is used to request establishment of a unicast bearer of the MBMS service between a base station of the current cell and the UE, so that the base station sends the MBMS service to the UE in the unicast bearer;

28. The UE of claim 22, wherein if the MBMS service bearer in the current cell is an SC-PTM, in the aspect that the target cell is determined according to the MBMS service bearer in the current cell and the second reselection candidate cell list, the processing module is specifically configured to:

29. The UE of claim 28, wherein the processing module is further configured to reselect the UE to the target cell after determining that a fourth cell in the second reselection candidate cell list is the target cell;

30. The UE of claim 26, wherein the sending module is further configured to send a unicast setup request message to a server in the current cell after the determining that the fourth cell in the second reselection candidate cell list is the target cell, where the unicast setup request message is used to request to set up a unicast bearer of the MBMS service between a base station of the current cell and the UE, so that the base station sends the MBMS service to the UE in the unicast bearer;

31. The UE according to any one of claims 20 to 30, wherein in terms of determining a target cell for cell reselection according to the bearer information of the MBMS service in the current cell and the bearer information of the MBMS service in the at least one neighboring cell, the processing module is specifically configured to:

32. The UE of claim 31, wherein in terms of receiving the MBMS service in the current cell, the receiving module is specifically configured to:

33. A multi-cell/multicast coordination network element, MCE, comprising:

34. The MCE of claim 33, wherein in terms of determining the bearer information of the MBMS service in the current cell, the processing module is specifically configured to:

judging whether the MBMS service already has a simulcast area,

35. A base station, comprising:

a receiving module, configured to receive bearer information of a multimedia broadcast multicast service MBMS service of a current cell and a first neighbor list, where the bearer information of the MBMS service includes a bearer mode of the MBMS service in the current cell, and if the bearer mode of the MBMS service in the current cell is a simulcast single-cell point-to-multipoint SC-PTM mode, the bearer information of the MBMS service further includes: the simulcast SC-PTM mode is that the same time-frequency resource and the same modulation and the same coding method MCS are used for sending the transmission blocks of the same MBMS service in at least one cell, and the area corresponding to the at least one cell is the simulcast area; the first neighbor list comprises: at least one adjacent cell supporting the MBMS service, a carrying mode of the MBMS service in the at least one adjacent cell, and a simulcast area of the adjacent cell carrying the MBMS service in a simulcast SC-PTM mode, wherein the carrying mode of the MBMS service comprises the simulcast SC-PTM mode and the SC-PTM mode;

36. The base station of claim 35, further comprising: a processing module for processing the received data,

37. The base station of claim 36, wherein in an aspect that a target cell for cell handover is determined according to the bearer information of the MBMS service in the current cell, the first neighbor cell list, and the measurement report information of the UE, the processing module is specifically configured to:

38. The base station of claim 37, wherein, in the aspect that the target cell is obtained according to the first neighbor cell list and the first handover candidate cell list, the processing module is specifically configured to:

or the like, or, alternatively,