CN111372199B - Method for sending MBMS service configuration information - Google Patents

Method for sending MBMS service configuration information Download PDF

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CN111372199B
CN111372199B CN201811601370.5A CN201811601370A CN111372199B CN 111372199 B CN111372199 B CN 111372199B CN 201811601370 A CN201811601370 A CN 201811601370A CN 111372199 B CN111372199 B CN 111372199B
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simulcast
mcch
configuration information
mbms
cell
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CN111372199A (en
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魏立梅
周志宏
袁乃华
范晨
朱玉梅
闫锐
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Chengdu TD Tech Ltd
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Chengdu TD Tech Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast

Abstract

The application discloses a method for sending MBMS service configuration information, which comprises the following steps: the eNodeB reports the simulcast SC-PTM configuration data of each cell to the MCE; when the MCE receives an MBMS session starting request from the MME, determining the transmission mode of the session of the MBMS service appointed by the request in each relevant cell according to the SC-PTM configuration data of each base station establishing M2 connection with the MCE; when determining that the MBMS service is transmitted in a simulcast region by adopting a simulcast SC-PTM mode, allocating PDSCH resources for the simulcast SC-MCCH of the simulcast region; sending the configuration information of the simulcast SC-MCCH to each corresponding eNodeB; the eNodeB sends the configuration information of the simulcast SC-MCCH through system broadcasting, and sends the PDSCH corresponding to the corresponding SC-MCCH according to the configuration information; and the UE monitors the simulcast SC-MCCH according to the configuration information of the simulcast SC-MCCH, acquires MBMS configuration information sent in a simulcast SC-PTM mode, and receives corresponding MBMS data according to the MBMS configuration information. By adopting the invention, diversity gain can be obtained when each cell in the simulcast region sends the MBMS configuration information.

Description

Method for sending MBMS service configuration information
Technical Field
The invention relates to a mobile communication technology, in particular to a method for sending Multimedia Broadcast Multicast Service (MBMS) configuration information in Single-Cell Point-to-Multipoint (SC-PTM).
Background
In the LTE system, the MBMS service may be transmitted in the MBSFN manner: all cells in one MBSFN area transmit the same MBMS service signal through PMCH in the same MBSFN subframe, so that a user receiving the MBMS service can obtain diversity gain. Specifically, the PMCH uses an extended CP, a dedicated pilot, a semi-statically configured time domain resource and an MCS, occupies the entire system bandwidth of an MBMS region (the MBMS region is equivalent to the data region of a normal subframe) of the MBSFN subframe, and transmits the MBMS via the antenna port 4.
However, in general, users receiving the MBMS service only exist in a plurality of cells in the MBSFN area, and air interface resources are wasted when no user sends the MBMS service in the cell. In order to solve the problem that the air interface resources are wasted in the MBSFN mode, the method of sending the MBMS service in the SC-PTM mode is introduced into the LTE system. This approach has the following advantages:
1. only selecting the cell where the user receiving the MBMS service is located to send the MBMS service in a wide area so as to save air interface resources of other cells without users;
2. transmitting MBMS service by using PDSCH, and supporting normal CP and extended CP;
3. estimating a wireless channel based on the CRS without adopting a special pilot frequency;
4. the PDSCH for sending the MBMS can share the resources of the data domain with the PDSCH for sending the non-MBMS in the non-MBSFN subframe;
5. the PDSCH for sending the MBMS supports DRX, the scheduling information is sent through a PDCCH scrambled by G-RNTI, and the G-RNTI is used for identifying the MBMS at an empty port;
the SC-PTM mode is adopted to send the MBMS service, although the waste of air interface resources of the MBSFN mode can be avoided, the users can not obtain the diversity gain of the MBSFN mode. The reason is that: when the MBMS is sent in the SC-PTM mode, the cell automatically decides to send the air interface resource and MCS used by the MBMS, so that the signals of the same MBMS sent by different cells are usually different, and users cannot carry out diversity combination on the MBMS signals from different cells.
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 the hot spot area, coverage is performed by several cells. Police patrols are often found in these cells. Group service interaction information is used between the policemen. In this scenario, the same group service is sent in adjacent cells through an SC-PTM method, air interface resources and MCSs used by different cells are usually different, MBMS service signals sent are usually different, and these signals generally interfere with each other at the same frequency.
In order to solve the problem of co-channel interference when the MBMS is transmitted in the SC-PTM mode in the above scene, and by taking advantage of the MBSFN, a transmission scheme of the MBMS is proposed at present, and the MBMS is transmitted in the simulcast SC-PTM mode in the scheme. Specifically, for the MBMS service transmitted in the simulcast SC-PTM manner, each cell in the hot spot area of the service transmits the same MBMS service signal through the PDSCH using the same CP, the same control domain length, the same time-frequency resource, and the same MCS in the same subframe, so that the user can obtain diversity gain when receiving the group service in the hot spot area. For cells in non-hotspot regions, such as: there are some cells distributed sporadically for users, and each cell still transmits MBMS service by SC-PTM mode. In simulcast SC-PTM, a simulcast area is introduced to indicate the hot spot area, and simulcast subframes are used to indicate subframes for transmitting MBMS service in a simulcast SC-PTM mode. In the above-mentioned MBMS service transmission scheme, the simulcast SC-PTM has the following characteristics:
1. the simulcast region is composed of a plurality of adjacent cells, and the same CP, the same control domain length, the same time-frequency resource and the same MCS are adopted in the cells in the same subframe to send the same MBMS service signal of the same MBMS service through PDSCH, so that users in the cells can obtain diversity gain when receiving the MBMS service, and the same frequency interference is avoided.
2. And the eNodeB with the simulcast SC-PTM function reports the cell with the simulcast SC-PTM function to the MCE so that the MCE can select the transmission mode of the MBMS service.
3. For an MBMS service, when the MCE determines that the MBMS service is sent in a simulcast SC-PTM mode in a simulcast area, the MCE determines the configuration information of a PDSCH sending the service according to the QoS of the service. The configuration information specifically includes the following contents:
(1) the simulcast area ID of the service is used to identify the transmission range of the service.
(2) And the RNTI of the service is distributed by the MCE and is used for distinguishing different MBMS services at an air interface, and meanwhile, a scrambling sequence generator of the PDSCH is initialized by using the RNTI.
(3) Semi-static configuration information of PDSCH: sending a simulcast subframe of the PDSCH, a CP type, a control domain length, a bandwidth occupied by the PDSCH and an MCS adopted by the PDSCH.
(4) Other PDSCH configuration information. Under the simulcast SC-PTM mode, reference signals based on PDSCH demodulation have three design methods. The mapping from PDSCH to RE is different under different reference signal design methods, and the contents of the corresponding other PDSCH configuration information are different, specifically as follows:
a) when demodulating PDSCH based on CRS, other PDSCH configuration information includes: and configuration information of CRS mapping patterns in the simulcast region. The information includes: the number of ports for each cell to transmit CRS and each cell physical layer cell ID (or physical layer cell ID modulo 6 value) in the simulcast region. According to the information, RE positions occupied by CRSs of each cell in the simulcast region can be determined, and the positions of REs are avoided in RE mapping by the PDSCH on RBs occupied by the PDSCH.
b) When transmitting a dedicated reference signal (dedicated RS) on an RB occupied by the PDSCH for demodulating the PDSCH, other PDSCH configuration information includes: and configuration information of CRS mapping patterns in the simulcast region. According to the information, RE positions occupied by CRSs of all cells in the simulcast region can be determined, the positions of REs are avoided by the special RS in RE mapping on RBs occupied by the PDSCH, and the positions of REs occupied by the CRS and the special RS are avoided by the PDSCH in RE mapping. The dedicated RS sequence is generated according to the simulcast area ID and/or the G-RNTI of the MBMS service.
c) On the RB occupied by the PDSCH, not transmitting CRS, but transmitting dedicated RS for demodulating PDSCH, and other PDSCH configuration information includes: no indication of CRS is transmitted. According to the instruction, CRSs of cells in the same broadcast region are not transmitted on RBs occupied by the PDSCH, only the dedicated RS is transmitted, and the PDSCH avoids RE positions occupied by the dedicated RS in RE mapping. The dedicated RS sequence is generated according to the simulcast area ID and/or the G-RNTI of the MBMS service.
4. And the MCE sends the configuration information of the MBMS to eNodeBs corresponding to all the cells in the simulcast region so that the eNodeBs send the MBMS in all the corresponding cells through PDSCHs according to the configuration information of the MBMS.
In the simulcast SC-PTM described above, the data of each MBMS service transmitted in a simulcast SC-PTM fashion is carried over an exclusive traffic channel SC-MTCH (simulcast SC-MTCH) which is mapped onto the exclusive DL-SCH which is mapped onto the exclusive PDSCH. When each cell in the simulcast region sends the exclusive PDSCH in the same subframe, each cell sends the same PDSCH signal by adopting the same CP, the same control domain length, the same time-frequency resource and the same MCS, so that the UE can obtain diversity gain when receiving the MBMS service. However, the configuration information of the MBMS service cannot obtain a diversity gain when transmitted in each cell in the simulcast area.
Specifically, each cell in a simulcast area has a unique SC-MCCH, and the SC-MCCH carries configuration information of the MBMS sent in the cell in an SC-PTM mode and configuration information of the MBMS sent in the simulcast SC-PTM mode. The configuration information of the MBMS service sent in the SC-PTM mode is SC-MTCH configuration information of the service, and the configuration information of the MBMS service sent in the simulcast SC-PTM mode is simulcast SC-MTCH configuration information of the service. The SC-MCCH is mapped to an exclusive DL-SCH which is mapped to an exclusive PDSCH. Because the MBMS services sent by the SC-PTM mode in each cell in the simulcast area may be different, and the MBMS services sent by the simulcast SC-PTM mode may also be different, the MBMS service configuration information carried on the SC-MCCH of each cell is different. Even if the MBMS service configuration information carried on the SC-MCCH of each cell is completely the same, it is difficult to ensure that the PDSCH corresponding to the SC-MCCH of each cell transmits the same signal in the same subframe because each cell allocates resources for the PDSCH corresponding to the SC-MCCH of the cell itself. Therefore, in the simulcast area, no matter whether the MBMS service configuration information carried on the SC-MCCH of each cell is the same or not, the configuration information of the MBMS service transmitted in the simulcast SC-PTM manner in the simulcast area cannot obtain diversity gain during transmission. Examples are as follows:
simulcast area a is made up of cell 1, cell 2 and cell 3. Simulcast zone B is composed of cell 1 and cell 3. The MBMS services transmitted in simulcast SC-PTM mode in simulcast area A have 2: MBMS service 1 and MBMS service 2. The MBMS services transmitted in the simulcast SC-PTM mode in the simulcast area B are 1: MBMS service 3. There are 1 MBMS services transmitted in SC-PTM in cell 1: MBMS service 4. There are 2 MBMS services transmitted in SC-PTM in cell 2: MBMS service 4 and MBMS service 5. There are 1 MBMS services transmitted in SC-PTM in cell 3: MBMS service 6. The MBMS service configuration information carried on the SC-MCCH of each cell in the simulcast area a is as follows:
(1) the SC-MCCH of the cell 1 simultaneously carries the configuration information of the MBMS services 1, 2, 3 and 4.
(2) The SC-MCCH of cell 2 simultaneously carries the configuration information of MBMS services 1, 2, 4 and 5.
(3) The SC-MCCH of cell 3 simultaneously carries the configuration information of MBMS services 1, 2, 3 and 6.
It can be seen that the configuration information carried on the SC-MCCH of each cell in the simulcast area a is different and accordingly cannot be achieved: the configuration information of MBMS services 1, 2 and 3 transmitted in simulcast SC-PTM manner obtains diversity gain in transmission.
Disclosure of Invention
In view of the above, the present invention is directed to a method for transmitting MBMS service configuration information, which can obtain diversity gain when each cell in a simulcast area transmits MBMS service configuration information.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a method for sending MBMS service configuration information comprises the following steps:
in the process of establishing an M2 interface, a base station eNodeB reports the configuration data from the simulcast single cell point to the multipoint SC-PTM of each cell to a multi-cell/multicast coordination entity MCE;
when the MCE receives an MBMS session starting request from an MME, determining the transmission mode of the session of the MBMS service specified by the MBMS session starting request in each relevant cell according to the SC-PTM configuration data of each base station which establishes M2 connection with the MCE; when determining that the MBMS service is transmitted in a simulcast region by adopting a simulcast SC-PTM mode, allocating PDSCH resources for the simulcast SC-MCCH of the simulcast region; sending the configuration information of the simulcast SC-MCCH to each corresponding eNodeB;
the eNodeB sends the configuration information of the simulcast SC-MCCH through system broadcasting, and sends a PDSCH corresponding to the corresponding SC-MCCH according to the configuration information of the simulcast SC-MCCH;
and the user equipment UE monitors the simulcast SC-MCCH in the cell according to the received configuration information of the simulcast SC-MCCH, acquires MBMS configuration information sent in a simulcast SC-PTM mode, and receives corresponding MBMS data according to the MBMS configuration information.
Preferably, the reporting, by the base station eNodeB to the multi-cell/multicast coordination entity MCE, the simulcast single-cell point-to-multipoint SC-PTM configuration data of each cell during the establishment of the M2 interface includes:
in the process of establishing an M2 interface, the eNodeB reports MBMS service configuration data of each cell to the MCE through a first special signaling, wherein for each cell with a simulcast SC-PTM function, the eNodeB reports the simulcast SC-PTM configuration data of the cell to the MCE in the first special signaling;
the MCE receives a first special signaling sent by the eNodeB, stores all configuration information in the first special signaling, and feeds back a response message to the eNodeB, wherein the response message carries: MCE ID, MCE name and MCCH configuration information of each related MBSFN area; wherein, if a plurality of simulcasting areas comprise cells of eNodeBs in the simulcasting areas established or pre-established by the MCE, the MCE carries in the response message: including simulcast SC-MCCH configuration information for a simulcast area of a cell of the eNodeB.
Preferably, the first dedicated signaling is an M2setup request message; the response message is an M2setup response message.
Preferably, the simulcast SC-PTM configuration data of the one cell includes: PLMN ID, cell ID, ID of simulcast area where the cell is located and ID of each MBMS service area where the cell belongs; wherein, when the system supports: when the CRS of each cell is still transmitted in the simulcast bandwidth where the PDSCH is located in the simulcast SC-PTM, the simulcast SC-PTM configuration data of the cell further includes: the number of antenna ports for CRS transmission by a cell and the physical layer cell identification related information of the cell are the physical layer cell ID of the cell or the value of the physical layer cell ID modulo 6.
Preferably, the simulcast SC-MCCH configuration information includes: a simulcast area ID, a cell ID list, and control channel information, wherein the control channel information includes: RNTI, modification period, repetition period, wireless frame bias, simulcast subframe distribution information, CP type, control domain length, simulcast bandwidth and MCS of the simulcast SC-MCCH; when the system supports: when the CRS of each cell is still transmitted in the simulcast bandwidth where the PDSCH is located in the simulcast SC-PTM, the control channel information further includes: and configuration information of CRS mapping patterns in the simulcast region.
Preferably, the RNTI of each simulcast SC-MCCH is a fixed value.
Preferably, the sending mode of the session of the MBMS service specified by the MBMS session start request in each relevant cell is determined according to the SC-PTM configuration data of each base station that establishes M2 connection with the MCE; when determining that the MBMS service is transmitted in a simulcast region by adopting a simulcast SC-PTM mode, allocating PDSCH resources for the simulcast SC-MCCH of the simulcast region; sending the configuration information of the simulcast SC-MCCH to each corresponding eNodeB comprises:
x1, when the MCE receives the MBMS conversation starting request message from MME, saving all configuration information in the message;
x2, the MCE determines the transmission mode of the MBMS service session in each relevant cell specified by the MBMS session start request message, and transmits the MBMS session start request message to each relevant eNodeB; wherein the determination of the transmission mode comprises:
the MCE divides the cell of the session for sending the MBMS into a plurality of MBSFN areas, a plurality of simulcast areas and a plurality of isolated cells according to the service area ID list and/or the cell ID list of the MBMS in the MBMS session starting request message, and the geographical position information, the MBMS configuration data and the simulcast SC-PTM configuration data of each cell of each eNodeB which establishes M2 connection with the MCE; in each divided MBSFN area, the session of the MBMS is transmitted in an MBSFN mode; in each divided simulcast area, the session of the MBMS service is sent in a simulcast SC-PTM mode; in each divided isolated cell, the session of the MBMS service is sent in an SC-PTM mode; for each divided MBSFN area, if the MCE does not allocate an MBSFN area ID to the MBSFN area, the MBSFN area is a newly-established MBSFN area, and the MCE allocates an MBSFN area ID to the MBSFN area and is used for distinguishing different MBSFN areas in the MCE; for each divided simulcast area, if the MCE has not allocated a simulcast area ID to the simulcast area, the simulcast area is a newly-created simulcast area, and the MCE allocates a simulcast area ID to the simulcast area for distinguishing different simulcast areas within the MCE; if the session of the MBMS has a divided simulcast region or a divided isolated cell, the MCE allocates a G-RNTI for the MBMS for distinguishing the MBMS sent in a simulcast SC-PTM mode or an SC-PTM mode in the MCE;
the MBMS session start request message carries: the ID of the M2 connection at the MCE side, the TMGI of the MBM service, the session ID of the MBMS service, the service area list of the MBM service and the TNL information of the MBMS service; when the MBMS service is sent in several cells of an eNodeB in an SC-PTM manner, the MBMS session start request message further carries: SC-PTM information; the SC-PTM information comprises: sending a cell ID list of a session of the MBMS service and an MBMS E-RAB QOS parameter of the MBMS service in an SC-PTM mode in a cell of an eNodeB;
x3, after receiving the MBMS conversation start request message sent by the MCE, the eNodeB saves all the configuration information in the message and feeds back an MBMS conversation start response message to the MCE; wherein, the MBMS session start response message carries: the MCE side M2 connection ID and the eNodeB side M2 connection ID are used for indicating that the eNodeB side establishes M2 connection for the MBMS service; the eNodeB adds corresponding IP multicast through an M1 interface according to TNL information carried by the MBMS conversation starting request message, and prepares to receive conversation data of corresponding MBMS services from the MBMS GW; when the MBMS session start request message carries SC-PTM information, the eNodeB allocates PDSCH resources for SC-MTCH of the MBMS service in each cell indicated by a cell ID list contained in the SC-PTM information according to MBMS E-RAB QOS parameters contained in the SC-PTM information, and determines SC-MTCH configuration information of the MBMS service; distributing PDSCH resources for SC-MCCH bearing SC-MTCH configuration information of the MBMS service in each cell indicated by the cell ID list, and determining SC-MCCH configuration information; if the eNodeB allocates PDSCH resources for the SC-MCCH of a cell, the eNodeB evaluates whether the PDSCH resources allocated to the SC-MCCH are enough, and if the PDSCH resources are not enough, the eNodeB allocates PDSCH resources for the SC-MCCH again; for the SC-MCCH of each cell indicated by the cell ID list, determining information carried on the SC-MCCH; storing the configuration information of each SC-MTCH, the configuration information of each SC-MCCH and the information loaded on the SC-MCCH of each SC-MCCH, which are indicated by the cell ID list, of each cell;
x4, when the MCE receives the MBMS session starting request response message sent by the eNodeB, feeding back the MBMS session starting request response message to an MME;
x5, for the MBMS service, the MCE allocates air interface wireless resources for the MBMS service in each divided MBSFN area and each divided simulcast area, determines information carried on the MCCH of each divided MBSFN area and information carried on the simulcast SC-MCCH of each divided simulcast area, and allocates air interface wireless resources for the MCCH of each related MBSFN area and the simulcast SC-MCCH of each related simulcast area;
x6, for the MBMS service, the MCE sends a second dedicated signaling to the corresponding eNodeB, where the second dedicated signaling carries: the method comprises the steps of updating the MCCH, updating the simulcast SC-MCCH, carrying information on the MCCH of each related MBSFN area, carrying information on the simulcast SC-MCCH of each related simulcast area, carrying MCCH configuration information of each related MCCH and simulcast SC-MCCH configuration information of each related simulcast SC-MCCH;
x7, the eNodeB receives the second dedicated signaling sent by the MCE, stores all the configuration information in the second signaling, and feeds back a corresponding response message to the MCE to indicate the eNodeB to complete the related configuration; for an MBSFN area, when the response message of the first special signaling and the second special signaling both carry the MCCH configuration information of the MBSFN area, replacing the MCCH configuration information of the MBSFN area in the response message of the first special signaling stored by the eNodeB by using the MCCH configuration information of the MBSFN area in the second special signaling; for a simulcast area, when the response message of the first dedicated signaling and the second dedicated signaling both carry the simulcast SC-MCCH configuration information of the simulcast area, the simulcast SC-MCCH configuration information of the simulcast area in the second dedicated signaling is used to replace the eNodeB to store the simulcast SC-MCCH configuration information of the simulcast area in the response message of the first dedicated signaling.
Preferably, the x5 includes:
the MCE distributes PMCH resources for the MTCH of the session of the MBMS service in each divided MBSFN area according to the saved MBMS E-RAB QoS parameters;
the MCE allocates PDSCH resources for the simulcast SC-MTCH of the session of the MBMS service in each divided simulcast region according to the saved MBMS E-RAB QoS parameters;
the MCE determines information carried on the MCCH of each divided MBSF area; the information carried on the MCCH of an MBSFN area is the configuration information of MTCH of each MBMS service sent in the MBSFN area.
The MCE determines information carried on the simulcast SC-MCCH of each divided simulcast area; the information carried on the simulcast SC-MCCH of one simulcast area is the configuration information of the simulcast SC-MTCH of each MBMS service sent in the simulcast area;
for newly-built MBSFN areas in each divided MBSFN area, the MCE newly-builds an MCCH for the MBSFN area, allocates PMCH resources for the MCCH, and determines MCCH configuration information of the MBSFN area;
for newly-built simulcast areas in each divided simulcast area, the MCE newly-builds a simulcast SC-MCCH for the simulcast area, allocates PDSCH resources for the simulcast SC-MCCH, and determines simulcast SC-MCCH configuration information of the simulcast area;
for each MBSFN area established in each divided MBSFN area, the MCE evaluates whether PMCH resources allocated to the MCCH of the MBSNF area are enough or not according to information carried on the MCCH of the MBSNF area, if not, the MCE allocates PMCH resources to the MCCH of the MBSNF area again, and the MCCH configuration information of the MBSFN area is determined according to the newly allocated PMCH resources;
for each established simulcast region in each divided simulcast region, the MCE evaluates whether the PDSCH resources already allocated to the simulcast SC-MCCH of the simulcast region are enough or not according to the information carried on the simulcast SC-MCCH of the simulcast region, if not, the MCE allocates PDSCH resources for the simulcast SC-MCCH of the simulcast region again, and determines the simulcast SC-MCCH configuration information of the simulcast region according to the newly allocated PDSCH resources.
Preferably, the MCE is an MTCH of the MBMS service, and allocates the same PMCH resource in each MBSFN area;
and the MCE is the simulcast SC-MTCH of the MBMS service, and the same PDSCH resources are distributed in each simulcast region.
Preferably, the second dedicated signaling is an MBMS session scheduling information message; and the response message corresponding to the second dedicated signaling is an MBMS conversation scheduling information response message.
Preferably, the eNodeB sending the configuration information of the simulcast SC-MCCH through system broadcast, and sending the PDSCH corresponding to the corresponding SC-MCCH according to the configuration information of the simulcast SC-MCCH includes:
y1, the eNodeB sending corresponding SIB messages in corresponding cells according to the stored MCCH configuration information of each MCCH and the simulcast SC-MCCH configuration information of each simulcast SC-MCCH; for the SC-MCCH configuration information of each SC-MCCH determined in step x3, the eNodeB transmits SIB20 in each corresponding cell;
y2, the eNodeB sends the corresponding MCCH and the corresponding simulcast SC-MCCH through the designated air interface resource at the designated time according to the stored information carried on the MCCH of each MBSFN area and the stored information carried on the simulcast SC-MCCH of each simulcast area; for the information carried on the SC-MCCH of each SC-MCCH determined in step x3, the eNodeB sends the corresponding SC-MCCH through the designated air interface resource;
y3, the eNodeB receives the data of the MBSM service from the MBMS GW;
y4, the eNodeB determining the MTCH configuration information and the simulcast SC-MTCH configuration information of the specified MBMS according to the stored information loaded on the MCCH of each MBSFN area and the stored information loaded on the simulcast SC-MCCH of each simulcast area, sending the PMCH corresponding to the MTCH of the specified MBMS through the specified air interface resources in each corresponding cell, and sending the PDSCH corresponding to the simulcast SC-MTCH of the specified MBMS through the specified air interface resources in each corresponding cell; for the SC-MTCH configuration information of each SC-MTCH determined in step x3, the eNodeB sends the PDSCH corresponding to the SC-MTCH in each corresponding cell through the designated air interface resource.
Preferably, y1 includes:
for each piece of stored MCCH configuration information, the eNodeB broadcasts the MCCH configuration information through SIB13 in each cell indicated by a cell ID list included in the MCCH configuration information;
for each stored simulcast SC-MCCH configuration information, the eNodeB broadcasts the simulcast SC-MCCH configuration information through SIB20 or newly added SIB in each cell indicated by a cell ID list included in the SC-MCCH configuration information;
when the eNodeB receives the SC-PTM information in step x3, the eNodeB broadcasts the SC-MCCH configuration information of each cell indicated by the cell ID list included in the SC-PTM information through SIB 20.
Preferably, y2 includes:
the eNodeB sends a corresponding MCCH in each cell corresponding to each MBSFN area according to the time indicated by the stored MCCH updating time, wherein the information carried on the corresponding MCCH is determined by the information carried on the MCCH corresponding to the MCCH, and the air interface wireless resource adopted by the PMCH corresponding to the corresponding MCCH is determined by the MCCH configuration information corresponding to the MCCH;
the eNodeB sends corresponding simulcast SC-MCCHs in each cell corresponding to each simulcast area according to the time indicated by the stored simulcast SC-MCCH updating time, wherein the information carried on the corresponding simulcast SC-MCCH is determined by the information carried on the simulcast SC-MCCH corresponding to the simulcast SC-MCCH, and the air interface wireless resources adopted by the PDSCH corresponding to the corresponding simulcast SC-MCCH are determined by the simulcast SC-MCCH configuration information corresponding to the simulcast SC-MCCH;
and for the information carried on the SC-MCCH of each SC-MCCH determined in step x3, the eNodeB sends the corresponding SC-MCCH through the designated air interface resource.
Preferably, y4 includes:
the eNodeB extracts MTCH configuration information of the MBMS from the stored information carried on the MCCH of any MBSFN area, and transmits the data of the MBSM service through the corresponding PMCH according to the MTCH configuration information;
the eNodeB extracts simulcast SC-MTCH configuration information of the MBMS from the stored information carried on the simulcast SC-MCCH of any simulcast area, and transmits the data of the MBSM service through a corresponding PDSCH according to the simulcast SC-MTCH configuration information;
for the SC-MTCH configuration information of each SC-MTCH determined in step x3, the eNodeB sends the PDSCH corresponding to the SC-MTCH in each corresponding cell through a designated air interface resource.
Preferably, the UE monitors the simulcast SC-MCCH in the cell according to the received configuration information of the simulcast SC-MCCH to obtain the MBMS service configuration information sent in a simulcast SC-PTM manner, and receiving the corresponding MBMS service data according to the MBMS service configuration information includes:
z1, the UE receives the corresponding SIB message to obtain the configuration information of the control channel related to the MBMS service; in an accessed cell or a resident cell, the UE receives SIB13 to obtain configuration information of the MCCH of each MBSFN area, the UE receives SIB20 or a new SIB to obtain configuration information of a simulcast SC-MCCH of each simulcast area, and the UE receives SIB20 to obtain configuration information of the SC-MCCH;
z2, the UE receives the corresponding control channel according to the obtained configuration information of the control channel related to the MBMS service; the UE receives each MCCH, each simulcast SC-MCCH and SC-MCCH according to the MCCH configuration information of each MBSFN area, the simulcast SC-MCCH configuration information of each simulcast area and the SC-MCCH configuration information;
z3, the UE selects the MBMS service to be received, and receives the corresponding service channel according to the configuration information of the service channel of the MBMS service to obtain the data of the MBMS service.
Preferably, z3 includes: the UE obtains each MBMS service broadcasted by the current cell according to each MTCH configuration information carried on each MCCH, each simulcast SC-MTCH configuration information carried on each simulcast SC-MCCH and each SC-MTCH configuration information carried on the SC-MCCH, selects one MBMS service from the MBMS services, and receives a corresponding service channel according to the service channel configuration information of the service to obtain the data of the service; and when the service channel corresponding to the selected MBMS is MTCH, simulcast SC-MTCH or SC-MTCH, the UE receives the corresponding service channel according to the corresponding MTCH configuration information, simulcast SC-MTCH configuration information or SC-MTCH configuration information so as to obtain the data of the MBMS.
In summary, in the sending method of the MBMS service configuration information in the simulcast SC-PTM proposed by the present invention, the eNodeB reports the simulcast SC-PTM capability information of each cell to the MCE, and the MCE determines a sending mode of the MBMS service according to the simulcast SC-PTM capability information reported by the eNodeB. When the MBMS service is transmitted by adopting a simulcast SC-PTM mode, establishing a simulcast area for the service, and allocating PDSCH resources for the simulcast SC-MCCH of the area; the MCE sends the configuration information of the simulcast SC-MCCH to each corresponding eNodeB; and the eNodeB sends the configuration information of the simulcast SC-MCCH through system broadcasting, and sends the corresponding PDSCH according to the configuration information of the simulcast SC-MCCH. Thus, the UE can obtain diversity gain when receiving the configuration information of the MBMS service transmitted in the simulcast SC-PTM mode.
Drawings
FIG. 1 is a schematic flow chart of a method according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a specific implementation flow of the embodiment of fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
In order to solve the problem that the configuration information of the MBMS service transmitted in the simulcast SC-PTM mode can not obtain diversity gain in the transmission process, in the transmission scheme of the MBMS service configuration information in the simulcast SC-PTM provided by the embodiment of the invention, a unique logic channel is established for each simulcast area: simulcast SC-MCCH, the SC-MCCH is mapped to exclusive DL-SCH, and the DL-SCH is mapped to exclusive PDSCH. The simulcast SC-MCCH only bears the configuration information of the MBMS service which is sent in a simulcast SC-PTM mode in a corresponding simulcast area. When a Multi-cell/Multicast Coordination Entity (MCE) establishes a simulcast area, a simulcast area ID is allocated to the simulcast area, and PDSCH resources are allocated to a simulcast SC-MCCH of the area. And the MCE sends the configuration information of the simulcast SC-MCCH to eNodeBs corresponding to all cells in the simulcast area. And the eNodeB broadcasts the configuration information of the simulcast SC-MCCH of the simulcast area to which the cell belongs in the corresponding cell through system information. When the eNodeB receives an indication of sending the simulcast SC-MCCH from the MCE, the eNodeB sends a corresponding PDSCH in a cell designated by the MCE according to the configuration information of the designated simulcast SC-MCCH at the simulcast SC-MCCH updating time designated by the MCE so that the UE obtains diversity gain when receiving the configuration information of the MBMS sent in the simulcast SC-PTM mode. The sending method of the PDSCH corresponding to the simulcast SC-MCCH is the same as the sending method of the PDSCH of the simulcast SC-MTCH. The configuration information of the simulcast SC-MCCH includes the same content as the configuration information of the simulcast SC-MTCH.
Fig. 1 is a flowchart illustrating an embodiment of the present invention, and as shown in fig. 1, a method for sending MBMS service configuration information implemented in the embodiment mainly includes:
step 101, a base station eNodeB reports the configuration data of the simulcast single cell point to multipoint SC-PTM of each cell to a multi-cell/multicast coordination entity MCE in the process of establishing an M2 interface.
Step 102, when the MCE receives an MBMS session start request from an MME, determining a transmission mode of a session of an MBMS service specified by the MBMS session start request in each relevant cell according to the SC-PTM configuration data of each base station that establishes M2 connection with the MCE; when determining that the MBMS service is transmitted in a simulcast region by adopting a simulcast SC-PTM mode, allocating PDSCH resources for the simulcast SC-MCCH of the simulcast region; and sending the configuration information of the simulcast SC-MCCH to each corresponding eNodeB.
And 103, the eNodeB sends the configuration information of the simulcast SC-MCCH through system broadcasting, and sends the PDSCH corresponding to the corresponding SC-MCCH according to the configuration information of the simulcast SC-MCCH.
Step 104, the user equipment UE monitors the simulcast SC-MCCH in the cell according to the received configuration information of the simulcast SC-MCCH, obtains MBMS service configuration information sent in a simulcast SC-PTM mode, and receives corresponding MBMS service data according to the MBMS service configuration information.
The following uses the schematic diagram of the transmission flow of the MBMS service configuration information in simulcast SC-PTM shown in fig. 2 to describe in detail the specific implementation of the above method embodiment
In the sending process of the MBMS service configuration information as shown in fig. 2, in a simulcast SC-PTM, while sending the MBMS service in a simulcast SC-PTM manner, in order to realize sending the configuration information of the MBMS service in a simulcast SC-PTM manner, an MCE, an eNodeB and a UE having a simulcast SC-PTM function need to execute the following procedures:
step (1) in the process of establishing the M2 interface, the eNodeB reports the MBMS service configuration data of each cell to the MCE through a special signaling, and for each cell with the simulcast SC-PTM function, the eNodeB newly adds the simulcast SC-PTM configuration data of the cells to the MCE in the special signaling. Preferably, the dedicated signaling is an M2SETUP REQUEST message (M2SETUP REQUEST).
Specifically, the eNodeB sends a dedicated signaling to the MCE, where the signaling carries: eNodeB ID, eNodeB name, MBMS service configuration data of each cell. The MBMS service configuration data of a cell is MBSFN configuration information of the cell. For each cell with the simulcast SC-PTM function, the eNodeB carries the simulcast SC-PTM configuration data of the cell through the signaling.
The simulcast SC-PTM configuration data of one cell comprises the following data: PLMN ID, cell ID, ID of simulcast area where the cell is located and ID of each MBMS service area where the cell belongs.
If agreed in the 3GPP protocol: when the CRS of each cell is still transmitted in the simulcast bandwidth where the PDSCH is located in the simulcast SC-PTM, the simulcast SC-PTM configuration data of one cell further includes: the number of antenna ports that the cell transmits CRS, and the physical layer cell ID of the cell (or the value of the physical layer cell ID modulo 6). The number of antenna ports on which a cell transmits CRS and the physical layer cell ID of the cell (or the value of the physical layer cell ID modulo 6) determine the RE locations within the simulcast bandwidth to which the CRS of the cell is mapped. The PDSCH in simulcast SC-PTM needs to avoid the RE occupied by the CRS in RE mapping.
Step (2) in the process of establishing the M2 interface, the MCE receives the dedicated signaling sent by the eNodeB, stores all configuration information in the dedicated signaling, and feeds back a response message to the eNodeB, where the response message carries: MCE ID, MCE name and MCCH configuration information of each related MBSFN area. If a plurality of simulcast areas include cells of eNodeBs in the simulcast areas established or pre-established by the MCE, the MCE newly adds a response message carrying: includes simulcast SC-MCCH configuration information for a simulcast area of a cell of an eNodeB. And the eNodeB receives the response message fed back by the MCE and stores all the configuration information in the message. For each MBSFN area corresponding to the MCCH configuration information in the response message, the eNodeB allocates air interface resources for the MCCH modification notification of the MBSFN area in each corresponding cell, determines the MCCH modification notification configuration information and stores the information; for the simulcast region corresponding to each simulcast SC-MCCH configuration information in the message, the eNodeB allocates air interface resources for the simulcast SC-MCCH modification notification of the simulcast region in each corresponding cell, determines the simulcast SC-MCCH modification notification configuration information and stores the information. Preferably, the response message is: m2 builds a RESPONSE message (M2SETUP RESPONSE).
The MCE can establish or pre-establish a plurality of MBSFN areas according to the requirements of the MBMS sent in the MBSFN mode, allocate MBSFN area IDs to each MBSFN area, and allocate PMCH resources to the MCCH of each MBSFN area.
If the MBSFN area established or pre-established by the MCE comprises the cell of the eNodeB, the MCE records the MBSFN area and records a cell ID list of the cell belonging to the MBSFN area in the cell of the eNodeB. The MCE carries the recorded MCCH configuration information of the MBSFN areas in a response message. The definition of MCCH configuration information for MBSFN areas is found in 3GPP 36.443 protocol. The eNodeB can send the MCCH on the designated radio resource in the corresponding cell according to the MCCH configuration information of one MBSFN area.
The MCE can establish or pre-establish a plurality of simulcasting areas according to the requirement of MBMS service transmitted in a simulcasting SC-PTM mode, allocate simulcasting area IDs for each simulcasting area, and allocate RNTIs and PDSCH resources for the simulcasting SC-MCCHs of each simulcasting area. The simulcast SC-MCCH is a control channel and is used for bearing the configuration information of the MBMS service sent in a simulcast SC-PTM mode in a simulcast area. The simulcast SC-MCCH is mapped to the exclusive DL-SCH, which is mapped to the exclusive PDSCH. The MCE allocates RNTI and PDSCH resources to the simulcast SC-MCCH, and aims to: and each cell in the simulcast region sends the simulcast SC-MCCH through the same PDSCH resource, so that the UE in the simulcast region can obtain diversity gain when receiving the simulcast SC-MCCH.
If a simulcast area established or pre-established by the MCE includes a cell of the eNodeB, the MCE records the simulcast area and records a cell ID list of a cell belonging to the simulcast area in the cell of the eNodeB. The MCE carries the simulcast SC-MCCH configuration information of these recorded simulcast areas in the response message. The eNodeB can send the simulcast SC-MCCH on the appointed wireless resource in the corresponding cell according to the simulcast SC-MCCH configuration information of one simulcast area.
Specifically, the simulcast SC-MCCH configuration information of the simulcast area includes: simulcast area ID, cell ID list and control channel information. The control channel information includes: RNTI, modification period (unit: radio frame), repetition period (unit: radio frame), radio frame bias, simulcast subframe allocation information (each simulcast subframe for sending the simulcast SC-MCCH), CP type, control domain length (unit: symbol), simulcast bandwidth and MCS of the simulcast SC-MCCH. The cell ID list is the cell ID list of a cell which belongs to a simulcast region and has a simulcast SC-PTM function in a cell of an eNodeB, and the simulcast bandwidth is the RB resource occupied by a PDSCH corresponding to the simulcast SC-MCCH and is represented by a starting RB number and a terminating RB number or represented by the starting RB number and the number of continuously allocated RBs. If agreed in the 3GPP protocol: when the CRS of each cell is still transmitted in the simulcast bandwidth where the PDSCH is located in the simulcast SC-PTM, the control channel information further includes: and configuration information of CRS mapping patterns in the simulcast region.
Specifically, the role of each IE included in the simulcast SC-MCCH configuration information of one simulcast area is as follows:
the simulcast SC-MCCH is repeatedly transmitted in each repetition period included in each modification period, and the modification period and repetition period of the simulcast SC-MCCH are indicated by IE "modification period" and IE "repetition period", respectively. And in each repetition period, the simulcast SC-MCCH is transmitted in each simulcast subframe indicated by IE 'simulcast subframe allocation information' in a radio frame indicated by IE 'radio frame offset'. The number of symbols occupied by the CP type and control field of each simulcast subframe transmitting the simulcast SC-MCCH is indicated by IE "CP type" and IE "control field length", respectively. In the simulcast subframe, the RB resource and MCS adopted by the PDSCH corresponding to the simulcast SC-MCCH are respectively indicated by IE 'simulcast bandwidth' and IE 'MCS'. The information carried on the simulcast SC-MCCH can only be updated at the beginning of each modification period, and the information carried on the simulcast SC-MCCH is repeatedly transmitted in each repetition period within one modification period.
In the 3GPP protocol, a mapping pattern of CRS to REs of a cell is defined when the number of antenna ports for transmitting CRS is N and the physical layer cell ID modulo 6 is M. Wherein, N takes values of 1, 2 and 4, and M takes values of 0, 1, 2, 3, 4 and 5. If agreed in the 3GPP protocol: when the CRS of each cell is still transmitted in the simulcast bandwidth where the PDSCH is located in the simulcast SC-PTM, in order to determine the RE position occupied by the CRS of each cell in the simulcast region, the configuration information of the CRS mapping pattern in the simulcast region comprises: in a cell which adopts 1 antenna port to transmit CRS in a simulcast region, all values of a physical layer cell ID module 6 are taken; in a cell which adopts 2 antenna ports to transmit CRS in a simulcast region, all values of a physical layer cell ID module 6 are taken; in a cell which adopts 4 antenna ports to transmit CRS in a simulcast region, all values of ID modulo 6 of a physical layer cell are obtained. In simulcast SC-PTM, the PDSCH of the simulcast SC-MTCH and the PDSCH of the simulcast SC-MCCH need to avoid the RE occupied by the CRS in RE mapping.
Preferably, it may be agreed in the 3GPP protocol: the RNTI of each simulcast SC-MCCH is a fixed value. Thus, when the UE moves in different simulcast areas, the time delay for capturing the simulcast SC-MCCH in the target simulcast area is shortened.
Preferably, in a cell that transmits CRS by using X antenna ports in a simulcast region, all values of physical layer cell ID modulo 6 are indicated by a cell ID mapping domain with a length of 6 bits, where X is 1, 2, or 4. From left to right, the 6 bits in this field correspond to physical layer cell ID modulo 6 with values 0, 1, 2, 3, 4, 5, respectively. When the value of a bit in the domain is 0, the following is expressed: the value of the physical layer cell ID modulo 6 without any cell in the simulcast area is the value corresponding to the bit; when the value of a bit in the domain is 1, the following is expressed: the value modulo 6 of the physical layer cell ID of at least one cell in the simulcast zone is the value corresponding to the bit.
And (3) when the MCE receives an MBMS SESSION starting REQUEST message (MBMS Session START REQUEST) from the MME, the MCE stores all the configuration information in the message.
Specifically, the MBMS session start request message received by the MCE from the MME includes: the identity TMGI of the MBMS service, the session ID of the MBMS service, a service area ID list, a cell ID list, MBMS E-RAB QoS parameters, session duration, minimum time to start transmission from the session, and TNL information (or optional TNL information). The MCE stores these IEs.
And (4) the MCE determines the transmission mode of the session of the MBMS service appointed in the received MBMS session start request message in each relevant service area, and transmits the MBMS session start request message to each relevant eNodeB.
The method comprises the following specific steps:
the MCE may divide the cell of the session transmitting the MBMS service into a plurality of MBSFN areas, a plurality of simulcast areas, and a plurality of isolated cells according to the service area ID list and/or the cell ID list of the MBMS service in the message, and the geographical location information, the MBMS service configuration data, and the simulcast SC-PTM configuration data of each cell of each eNodeB which establishes M2 connection with the MCE.
In each divided MBSFN area, the session is transmitted in an MBSFN manner; in each divided simulcast area, the session is transmitted in a simulcast SC-PTM mode; in each divided isolated cell, the session is transmitted in an SC-PTM manner. For each divided MBSFN area, if the MCE does not allocate an MBSFN area ID to the MBSFN area, the MBSFN area is a newly-established MBSFN area, and the MCE allocates an MBSFN area ID to the MBSFN area for distinguishing different MBSFN areas in the MCE. For each divided simulcast area, if the MCE has not allocated a simulcast area ID to the simulcast area, the simulcast area is a newly-created simulcast area, and the MCE allocates a simulcast area ID to the simulcast area for distinguishing different simulcast areas in the MCE. If the session of the MBMS has a divided simulcast area or a divided isolated cell, the MCE allocates a G-RNTI for the MBMS for distinguishing the MBMS sent in a simulcast SC-PTM mode or an SC-PTM mode in the MCE.
For eNodeBs establishing an M2 connection with the MCE, when at least one of the cells of the eNodeB transmits a session of the MBMS service, the MCE transmits an MBMS session start request message to the eNodeB for establishing an M2 connection of the MBMS service between the MCE and the eNodeB. The following are carried in the message: the ID of the MCE side M2 connection, the TMGI of the MBM service, the session ID of the MBMs service, the service area list of the MBM service, and the TNL information (or optional TNL information) of the MBMs service.
When the service is sent in a plurality of cells of the eNodeB in an SC-PTM manner, the message also carries: SC-PTM information. The SC-PTM information comprises: and transmitting a 'cell ID list' of the session of the MBMS service and 'MBMS E-RAB QOS parameters' of the MBMS service in an SC-PTM mode in a cell of the eNodeB.
And (5) the eNodeB receives the MBMS SESSION starting request message sent by the MCE, stores all the configuration information in the message, and feeds back an MBMS SESSION starting RESPONSE message (MBMS Session START RESPONSE) to the MCE. The following are carried in the message: the MCE side M2 connection ID and the eNodeB side M2 connection ID are used to indicate that the M2 connection is established for the MBMS service on the eNodeB side. The eNodeB joins the corresponding IP multicast through the M1 interface according to the IE "TNL information" (or IE "optional TNL information") in the message, and prepares to receive data of the session of the corresponding MBMS service from the MBMS GW.
When the special signaling carries IE 'SC-PTM information', the eNodeB distributes PDSCH resources for SC-MTCH of the MBMS service in each cell indicated by the sub IE 'cell ID list' according to the sub IE 'MBMS E-RAB QOS parameter', and determines the SC-MTCH configuration information of the service. And meanwhile, the eNodeB allocates PDSCH resources for the SC-MCCH bearing the SC-MTCH configuration information of the MBMS service in each cell indicated by the sub-IE 'cell ID list' to determine the SC-MCCH configuration information.
When the eNodeB has allocated PDSCH resources to the SC-MCCH of a cell, the eNodeB needs to evaluate whether PDSCH resources already allocated to the SC-MCCH are sufficient because SC-MTCH configuration information of an MBMS service is added to information carried on the SC-MCCH, and if not, the eNodeB needs to allocate PDSCH resources to the SC-MCCH again.
And for the SC-MCCH of each cell indicated by the sub-IE 'cell ID list', determining the information carried on the SC-MCCH.
The eNodeB stores SC-MTCH configuration information, SC-MCCH configuration information and SC-MCCH information carried on SC-MCCH of each cell indicated by a sub-IE 'cell ID list'.
And (6) when the MCE receives the MBMS session starting request response message sent by the related eNodeB, the MCE feeds back the MBMS session starting request response message to the MME.
Specifically, after the MCE sends the MBMS session start request message to the relevant enodebs in step (4), the MBMS session start request response message is fed back to the MME as long as the MBMS session start request response message sent by any one of the enodebs is received.
And (7) for the MBMS service specified in the step (4), the MCE allocates air interface radio resources for the service in each divided MBSFN area and each divided simulcast area, the MCE determines the information carried on the MCCH of each divided MBSFN area and the information carried on the simulcast SC-MCCH of each divided simulcast area, and the MCE allocates air interface radio resources for the MCCH of each related MBSFN area and the simulcast SC-MCCH of each related simulcast area.
And (4) the MCE allocates PMCH resources for the MTCH of the session of the MBMS service specified in the step (4) in each divided MBSFN area according to the stored IE 'MBMS E-RAB QoS parameter'.
Preferably, the MCE allocates the same PMCH resource in each MBSFN area for MTCH of the MBMS service, so that the service interruption time can be reduced when the UE moves in each MBSFN area.
In a simulcast area, each MBMS service has one traffic channel: simulcast SC-MTCH, which is mapped onto exclusive DL-SCH, which is mapped onto exclusive PDSCH. And (4) the MCE allocates PDSCH resources for the simulcast SC-MTCH of the session of the MBMS service specified in the step (4) in each divided simulcast region according to the stored IE 'MBMS E-RAB QoS parameter'. Preferably, the MCE allocates the same PDSCH resources in each simulcast region for the simulcast SC-MTCH of the MBMS service, so that the service interruption time can be reduced when the UE moves in each simulcast region.
And the MCE determines the information carried on the MCCH of each divided MBSF area. The information carried on the MCCH of an MBSFN area is the configuration information of MTCH of each MBMS service sent in the MBSFN area. The eNodeB may send a PMCH corresponding to the MTCH in a corresponding cell according to the configuration information of the MTCH of one MBMS service.
And the MCE determines the information carried on the simulcast SC-MCCH of each divided simulcast area. The information carried on the simulcast SC-MCCH of one simulcast area is the configuration information of the simulcast SC-MTCH of each MBMS service sent in the simulcast area. The eNodeB can send PDSCH corresponding to the simulcast S-MTCH in a corresponding cell according to the configuration information of the simulcast SC-MTCH of one MBMS service.
For the newly-established MBSFN areas in each divided MBSFN area, the MCE establishes an MCCH for the MBSFN area, allocates PMCH resources for the MCCH, and determines MCCH configuration information of the MBSFN area.
And for the newly-established simulcast areas in each divided simulcast area, the MCE establishes a simulcast SC-MCCH for the simulcast area, allocates PDSCH resources for the simulcast SC-MCCH, and determines the simulcast SC-MCCH configuration information of the simulcast area.
For each MBSFN area established in each divided MBSFN area, the MCE evaluates whether PMCH resources allocated to the MCCH of the MBSNF area are enough or not according to information carried on the MCCH of the MBSNF area, if the PMCH resources are not enough, the MCCH resources are allocated to the MCCH of the MBSFN area again by the MCE, and the MCCH configuration information of the MBSFN area is determined according to the newly allocated PMCH resources.
For each established simulcast region in each divided simulcast region, the MCE evaluates whether the PDSCH resources already allocated to the simulcast SC-MCCH of the simulcast region are enough or not according to the information carried on the simulcast SC-MCCH of the simulcast region, if the MCE is not enough, the PDSCH resources are allocated to the simulcast SC-MCCH of the simulcast region again, and the simulcast SC-MCCH configuration information of the simulcast region is determined according to the newly allocated PDSCH resources.
Specifically, for the MCCH or simulcast SC-MCCH, as the number of the configuration information of the MTCH or simulcast SC-MTCH carried on the channel increases, the PMCH or PDSCH resource originally allocated to the MCCH or simulcast SC-MCCH may be insufficient, and therefore, whenever the configuration information of the MBSM service is newly added on one MCCH or simulcast SC-MCCH, the MCE needs to re-evaluate whether the resource already allocated to the MCCH or simulcast SC-MCCH is sufficient, and when the resource is insufficient, the resource needs to be re-allocated to the MCCH or simulcast SC-MCCH.
Step (8) for the MBMS service specified in step (4), the MCE sends a dedicated signaling to the corresponding eNodeB, where the dedicated signaling carries: the method comprises the steps of updating the MCCH, updating the simulcast SC-MCCH, information carried on the MCCH of each related MBSFN area, information carried on the simulcast SC-MCCH of each related simulcast area, MCCH configuration information of each related MCCH and simulcast SC-MCCH configuration information of each related simulcast SC-MCCH. Preferably, the dedicated signaling is an MBMS session SCHEDULING INFORMATION message (MBMS SCHEDULING INFORMATION).
For eNodeBs connected with M2 established by the MCE, when at least one cell in the cells of the eNodeBs sends the session of the MBMS service in an MBSFN mode or a simulcast SC-PTM mode, the MCE sends a dedicated signaling to the eNodeBs.
And (4) for each MBSFN area divided in the step (4), when at least one cell in the MBSFN area belongs to the eNodeB, recording the MBSFN ID of the MBSFN area. When the MBSFN ID of at least one MBSFN area is recorded, the MCE carries in the dedicated signaling sent to the eNodeB: the MCCH updating time and the recorded information carried on the MCCH of each MBSFN area.
The recorded information carried on the MCCH of the MBSFN area is MTCH configuration information of each MBMS service of the MBSFN area.
Since the MTCH configuration information of the MBMS service specified in step (4) is added to the recorded MCCH of the MBSFN area and the information carried on the MCCH changes, the eNodeB needs to determine an initial modification period for transmitting new information on the MCCH in the recorded MBSFN area according to the "MCCH update time", and starts to transmit the new information on the MCCH from the initial modification period.
If there is an MBSFN area newly created in step (7) in these recorded MBSFN areas, and if there is an MBSFN area whose MCCH configuration information is updated in step (7), the MCE further carries, in the dedicated signaling sent to the eNodeB: the MCCH configuration information of these MBSFN areas, so that the eNodeB can obtain the relevant MCCH configuration information of each newly-created MBSFN area and the MCCH configuration information of the MBSFN area in which the MCCH configuration information is updated.
And (4) for each simulcast area divided in the step (4), when at least one cell in the simulcast area belongs to the eNodeB, recording the simulcast area ID of the simulcast area. When the simulcast area ID of at least one simulcast area is recorded, the MCE carries in the dedicated signaling sent to the eNodeB: the updating time of the simulcast SC-MCCH and the recorded information carried on the simulcast SC-MCCH of each simulcast area. The recorded information carried on the simulcast SC-MCCH of the simulcast area is the simulcast SC-MTCH configuration information of each MBMS service of the simulcast area.
Since the simulcast SC-MTCH configuration information of the MBMS service specified in step (4) is added to the simulcast SC-MCCH of the recorded simulcast area and the information carried on the simulcast SC-MCCH changes, the eNodeB needs to determine an initial modification period for sending new information on the simulcast SC-MCCH in the recorded simulcast area according to the simulcast SC-MCCH update time, and starts sending new information on the simulcast SC-MCCH from the initial modification period.
In these recorded simulcast areas, if there is a simulcast area newly created in step (7), and if there is a simulcast area in which the simulcast SC-MCCH configuration information is updated in step (7), the MCE further carries, in the dedicated signaling sent to the eNodeB: the simulcast SC-MCCH configuration information of the simulcast areas is used, so that the eNodeB can obtain the related simulcast SC-MCCH configuration information of each newly-built simulcast area and the simulcast SC-MCCH configuration information of the simulcast area with updated simulcast SC-MCCH configuration information.
And (9) the eNodeB receives the special signaling sent by the MCE, stores all configuration information in the signaling, and feeds back a response message to the MCE to indicate the eNodeB to complete the relevant configuration. Preferably, the RESPONSE message is an MBMS session SCHEDULING INFORMATION RESPONSE message (MBMS SCHEDULING INFORMATION RESPONSE).
The configuration information saved by the eNodeB includes: the MCCH update time, the simulcast SC-MCCH update time, the "information carried on the MCCH" for each MBSFN area, the "information carried on the simulcast SC-MCCH" for each simulcast area, the "MCCH configuration information" for each MCCH and the "simulcast SC-MCCH configuration information" for each simulcast SC-MCCH.
For an MBSFN area, when the dedicated signaling in steps (2) and (7) both carry the MCCH configuration information of the MBSFN area, replacing the MCCH configuration information of the MBSFN area in step (2) stored by the eNodeB with the MCCH configuration information of the MBSFN area in step (7).
For a simulcast area, when the dedicated signaling in steps (2) and (7) both carry the simulcast SC-MCCH configuration information of the simulcast area, the simulcast SC-MCCH configuration information of the simulcast area in step (7) is used to replace the simulcast SC-MCCH configuration information of the simulcast area in step (2) stored by the eNodeB.
And (10) the eNodeB sends corresponding SIB messages in corresponding cells according to the stored 'MCCH configuration information' of each MCCH and 'simulcast SC-MCCH configuration information' of each simulcast SC-MCCH. And (4) for the SC-MCCH configuration information of each SC-MCCH determined in the step (5), the eNodeB sends SIB20 in each corresponding cell.
The method comprises the following specific steps:
for each saved IE "MCCH configuration information", the eNodeB broadcasts the "MCCH configuration information" of the MCCH corresponding to the IE through the SIB13 in each cell indicated by the sub-IE "cell ID list" included in the IE, so that the UE captures the latest configuration information of the MCCH.
For each saved IE "simulcast SC-MCCH configuration information", each cell indicated by the sub IE "cell ID list" included in the IE by the eNodeB broadcasts the "simulcast SC-MCCH configuration information" of the simulcast SC-MCCH corresponding to the IE through the SIB20 or a newly added SIB, so that the UE captures the latest configuration information of the simulcast SC-MCCH.
When the IE "SC-PTM information" is carried in the dedicated signaling received by the eNodeB in step (5), the eNodeB broadcasts the "SC-MCCH configuration information" of each cell indicated by the sub-IE "cell ID list" through SIB20, so that the UE can acquire the latest configuration information of the SC-MCCH of the cell.
And (11) the eNodeB sends the corresponding MCCH and the corresponding simulcast SC-MCCH through the appointed air interface resource at the appointed time according to the stored information borne on the MCCH of each MBSFN area and the stored information borne on the simulcast SC-MCCH of each simulcast area. And (5) for the information carried on the SC-MCCHs of the SC-MCCHs determined in the step (5), the eNodeB sends the corresponding SC-MCCHs through the appointed air interface resources.
The method comprises the following specific steps:
and the eNodeB sends corresponding MCCHs in each cell corresponding to each MBSFN area according to the stored IE ' MCCH update time ' at the time indicated by the IE, the information carried on the corresponding MCCHs is determined by the IE ' information carried on the MCCHs corresponding to the corresponding MCCHs, and the air interface wireless resources adopted by the PMCH corresponding to the corresponding MCCHs are determined by the IE ' MCCH configuration information ' corresponding to the MCCHs.
And the eNodeB sends corresponding simulcast SC-MCCHs in each cell corresponding to each simulcast area according to the stored IE 'simulcast SC-MCCH update time' at the time indicated by the IE, the information carried on the corresponding simulcast SC-MCCH is determined by the IE 'simulcast SC-MCCH information' corresponding to the simulcast SC-MCCH, and the air interface wireless resources adopted by the PDSCH corresponding to the corresponding simulcast SC-MCCH are determined by the IE 'simulcast SC-MCCH configuration information' corresponding to the simulcast SC-MCCH.
And (5) for the information carried on the SC-MCCHs of the SC-MCCHs determined in the step (5), the eNodeB sends the corresponding SC-MCCHs through the appointed air interface resources.
And (12) the eNodeB receives the data of the MBSM service designated in the step (4) from the MBMS GW.
And (13) the eNodeB determines the MTCH configuration information and the simulcast SC-MTCH configuration information of the specified MBMS according to the stored information loaded on the MCCH of each MBSFN area and the stored information loaded on the simulcast SC-MCCH of each simulcast area, sends the PMCH corresponding to the MTCH of the specified MBMS through the specified air interface resources in each corresponding cell, and sends the PDSCH corresponding to the simulcast SC-MTCH of the specified MBMS through the specified air interface resources in each corresponding cell. And (5) for the SC-MTCH configuration information of each SC-MTCH determined in the step (5), the eNodeB sends the PDSCH corresponding to the SC-MTCH in each corresponding cell through the appointed air interface resource.
Specifically, the eNodeB extracts the MTCH configuration information of the MBMS service specified in step (4) from the "information carried on MCCH" stored in any MBSFN area, and sends the data of the MBSM service obtained in step (12) through the corresponding PMCH according to the configuration information.
And the eNodeB extracts the simulcast SC-MTCH configuration information of the MBMS service specified in the step (4) from the stored information carried on the simulcast SC-MCCH of any simulcast area, and transmits the data of the MBSM service obtained in the step (12) through the corresponding PDSCH according to the configuration information.
And (5) for the SC-MTCH configuration information of each SC-MTCH determined in the step (5), the eNodeB sends the PDSCH corresponding to the SC-MTCH in each corresponding cell through the appointed air interface resource.
Further, the process of receiving the MBMS service by the UE includes the following steps:
step a1, the UE receives the corresponding SIB message to obtain the configuration information of the MBMS service related control channel.
The method comprises the following specific steps:
in an accessed cell or a resident cell, the UE receives SIB13 to obtain configuration information of MCCH of each MBSFN area, the UE receives SIB20 or a new SIB to obtain configuration information of simulcast SC-MCCH of each simulcast area, and the UE receives SIB20 to obtain configuration information of SC-MCCH.
Step a2, the UE receives the corresponding control channel according to the obtained configuration information of the control channel related to the MBMS service.
Specifically, the UE receives each MCCH, each simulcast SC-MCCH and SC-MCCH according to the MCCH configuration information of each MBSFN area, the simulcast SC-MCCH configuration information of each simulcast area and the SC-MCCH configuration information.
Step a3, the UE selects the MBMS service to be received, and receives the corresponding service channel according to the configuration information of the service channel of the MBMS service to obtain the data of the MBMS service.
Specifically, the UE obtains each MBMS service broadcasted by the current cell according to each MTCH configuration information carried on each MCCH, each simulcast SC-MTCH configuration information carried on each simulcast SC-MCCH, and each SC-MTCH configuration information carried on the SC-MCCH, selects one MBMS service from the MBMS services, and receives a corresponding service channel according to the service channel configuration information of the service to obtain data of the service.
And when the service channel corresponding to the selected MBMS is MTCH, simulcast SC-MTCH or SC-MTCH, the UE receives the corresponding service channel according to the corresponding MTCH configuration information, simulcast SC-MTCH configuration information or SC-MTCH configuration information so as to obtain the data of the MBMS.
The step (1) and the step (2) are the M2 interface establishment process. After the above M2 interface establishment procedure is finished, either the MCE or the eNodeB may initiate an "M2 interface configuration update procedure". The method comprises the following specific steps:
if a newly-built MBSFN area, a newly-built simulcasting area, an MBSFN area with updated MCCH configuration information and a simulcasting area with updated simulcasting SC-MCCH configuration information exist on the MCE side, the MCE initiates an M2 interface configuration updating process, sends a special signaling to each related eNodeB, and the special signaling carries: the related MCCH configuration information of each MBSFN area and the related simulcast SC-MCCH configuration information of each simulcast area. Preferably, the dedicated signaling is an "MCE CONFIGURATION UPDATE message" (MCE CONFIGURATION UPDATE).
Here, in an eNodeB that establishes an M2 interface with the MCE, if at least one of a newly-established MBSFN area, a newly-established simulcast area, an MBSFN area in which MCCH configuration information is updated, and a simulcast area in which simulcast SC-MCCH configuration information is updated includes a cell of one eNodeB, the MCE transmits the dedicated signaling to the eNodeB.
For each region of the cell above that includes this eNodeB, the MCE carries in dedicated signaling: MCCH configuration information for MBSFN areas in these areas and simulcast SC-MCCH configuration information for simulcast areas in these areas.
When the corresponding eNodeB receives the special signaling sent by the MCE, all the configuration information in the special signaling is stored, and a response message is fed back to the MCE. Preferably, the response message is an "MCE CONFIGURATION UPDATE acknowledgement message" (MCE CONFIGURATION UPDATE ACKNOWLEDGE message).
After the M2 interface establishment procedure is finished, if the update of the MBMS service configuration data and/or the update of the simulcast SC-PTM configuration data occurs at the eNodeB side, the eNodeB initiates an "M2 interface configuration update procedure" and sends a dedicated signaling to the MCE, where the dedicated signaling carries: MBMS service configuration data of each cell and simulcast SC-PTM configuration data of each cell with simulcast SC-PTM function. Preferably, the dedicated signaling is an "ENB CONFIGURATION UPDATE message" (ENB CONFIGURATION UPDATE).
The MCE receives the special signaling sent by the eNodeB, feeds back a response message to the eNodeB, and the response message carries: the related MCCH configuration information of each MBSFN area and the related simulcast SC-MCCH configuration information of each simulcast area. Preferably, the response message is an "ENB CONFIGURATION UPDATE confirm message" (ENB CONFIGURATION UPDATE acknowledgement).
In addition, each of the embodiments of the present invention can be realized by a data processing program executed by a data processing apparatus such as a computer. It is clear that the data processing program constitutes the invention. Further, the data processing program, which is generally stored in one storage medium, is executed by directly reading the program out of the storage medium or by installing or copying the program into a storage device (such as a hard disk and/or a memory) of the data processing device. Such a storage medium therefore also constitutes the present invention. The storage medium may use any type of recording means, such as a paper storage medium (e.g., paper tape, etc.), a magnetic storage medium (e.g., a flexible disk, a hard disk, a flash memory, etc.), an optical storage medium (e.g., a CD-ROM, etc.), a magneto-optical storage medium (e.g., an MO, etc.), and the like.
The invention therefore also discloses a storage medium in which a data processing program is stored which is designed to carry out any one of the embodiments of the method according to the invention described above.
In addition, the method steps described in the present invention can be implemented by hardware, for example, logic gates, switches, Application Specific Integrated Circuits (ASICs), programmable logic controllers, embedded microcontrollers and the like, in addition to data processing programs. Such hardware capable of implementing the methods of the present invention may also constitute the present invention.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (16)

1. A method for sending MBMS service configuration information is characterized by comprising the following steps:
in the process of establishing an M2 interface, a base station eNodeB reports the configuration data from the simulcast single cell point to the multipoint SC-PTM of each cell to a multi-cell/multicast coordination entity MCE;
when the MCE receives an MBMS session starting request from an MME, determining the transmission mode of the session of the MBMS service specified by the MBMS session starting request in each relevant cell according to the SC-PTM configuration data of each base station which establishes M2 connection with the MCE; when determining that the MBMS service is transmitted in a simulcast region by adopting a simulcast SC-PTM mode, allocating PDSCH resources for the only simulcast SC-MCCH of the simulcast region, so that each cell in the simulcast region transmits the simulcast SC-MCCH through the same PDSCH resources; sending the configuration information of the simulcast SC-MCCH to each corresponding eNodeB;
the eNodeB sends the configuration information of the simulcast SC-MCCH through system broadcasting, and sends a PDSCH corresponding to the corresponding SC-MCCH according to the configuration information of the simulcast SC-MCCH;
and the user equipment UE monitors the simulcast SC-MCCH in the cell according to the received configuration information of the simulcast SC-MCCH, acquires MBMS configuration information sent in a simulcast SC-PTM mode, and receives corresponding MBMS data according to the MBMS configuration information.
2. The method of claim 1, wherein the base station eNodeB reporting the simulcast single-cell point-to-multipoint SC-PTM configuration data of each cell to a multi-cell/multicast coordination entity MCE during the establishment of the M2 interface comprises:
in the process of establishing an M2 interface, the eNodeB reports MBMS service configuration data of each cell to the MCE through a first special signaling, wherein for each cell with a simulcast SC-PTM function, the eNodeB reports the simulcast SC-PTM configuration data of the cell to the MCE in the first special signaling;
the MCE receives a first special signaling sent by the eNodeB, stores all configuration information in the first special signaling, and feeds back a response message to the eNodeB, wherein the response message carries: MCE ID, MCE name and MCCH configuration information of each related MBSFN area; wherein, if a plurality of simulcasting areas comprise cells of eNodeBs in the simulcasting areas established or pre-established by the MCE, the MCE carries in the response message: including simulcast SC-MCCH configuration information for a simulcast area of a cell of the eNodeB.
3. The method of claim 2, wherein the first dedicated signaling is an M2setup request message; the response message is an M2setup response message.
4. The method of claim 3, wherein the simulcast SC-PTM configuration data for the one cell comprises: PLMN ID, cell ID, ID of simulcast area where the cell is located and ID of each MBMS service area where the cell belongs; wherein, when the system supports: when the CRS of each cell is still transmitted in the simulcast bandwidth where the PDSCH is located in the simulcast SC-PTM, the simulcast SC-PTM configuration data of the cell further includes: the number of antenna ports for CRS transmission by a cell and the physical layer cell identification related information of the cell are the physical layer cell ID of the cell or the value of the physical layer cell ID modulo 6.
5. The method of claim 2, wherein the simulcast SC-MCCH configuration information comprises: a simulcast area ID, a cell ID list, and control channel information, wherein the control channel information includes: RNTI, modification period, repetition period, wireless frame bias, simulcast subframe distribution information, CP type, control domain length, simulcast bandwidth and MCS of the simulcast SC-MCCH; when the system supports: when the CRS of each cell is still transmitted in the simulcast bandwidth where the PDSCH is located in the simulcast SC-PTM, the control channel information further includes: and configuration information of CRS mapping patterns in the simulcast region.
6. The method of claim 5, wherein the RNTI of each of the simulcast SC-MCCHs is a fixed value.
7. The method of claim 2, wherein the determining the transmission manner of the session of the MBMS service specified by the MBMS session start request in the relevant cells is performed according to the SC-PTM configuration data of each base station that establishes M2 connection with the MCE; when determining that the MBMS service is transmitted in a simulcast region by adopting a simulcast SC-PTM mode, allocating PDSCH resources for the simulcast SC-MCCH of the simulcast region; sending the configuration information of the simulcast SC-MCCH to each corresponding eNodeB comprises:
x1, when the MCE receives the MBMS conversation starting request message from MME, saving all configuration information in the message;
x2, the MCE determines the transmission mode of the MBMS service session in each relevant cell specified by the MBMS session start request message, and transmits the MBMS session start request message to each relevant eNodeB; wherein the determination of the transmission mode comprises:
the MCE divides the cell of the session for sending the MBMS into a plurality of MBSFN areas, a plurality of simulcast areas and a plurality of isolated cells according to the service area ID list and/or the cell ID list of the MBMS in the MBMS session starting request message, and the geographical position information, the MBMS configuration data and the simulcast SC-PTM configuration data of each cell of each eNodeB which establishes M2 connection with the MCE; in each divided MBSFN area, the session of the MBMS is transmitted in an MBSFN mode; in each divided simulcast area, the session of the MBMS service is sent in a simulcast SC-PTM mode; in each divided isolated cell, the session of the MBMS service is sent in an SC-PTM mode; for each divided MBSFN area, if the MCE does not allocate an MBSFN area ID to the MBSFN area, the MBSFN area is a newly-established MBSFN area, and the MCE allocates an MBSFN area ID to the MBSFN area and is used for distinguishing different MBSFN areas in the MCE; for each divided simulcast area, if the MCE has not allocated a simulcast area ID to the simulcast area, the simulcast area is a newly-created simulcast area, and the MCE allocates a simulcast area ID to the simulcast area for distinguishing different simulcast areas within the MCE; if the session of the MBMS has a divided simulcast region or a divided isolated cell, the MCE allocates a G-RNTI for the MBMS for distinguishing the MBMS sent in a simulcast SC-PTM mode or an SC-PTM mode in the MCE;
the MBMS session start request message carries: the ID connected by the M2 at the MCE side, the TMGI of the MBMS service, the session ID of the MBMS service, the service area list of the MBMS service and the TNL information of the MBMS service; when the MBMS service is sent in several cells of an eNodeB in an SC-PTM manner, the MBMS session start request message further carries: SC-PTM information; the SC-PTM information comprises: sending a cell ID list of a session of the MBMS service and an MBMS E-RAB QOS parameter of the MBMS service in an SC-PTM mode in a cell of an eNodeB;
x3, after receiving the MBMS conversation start request message sent by the MCE, the eNodeB saves all the configuration information in the message and feeds back an MBMS conversation start response message to the MCE; wherein, the MBMS session start response message carries: the MCE side M2 connection ID and the eNodeB side M2 connection ID are used for indicating that the eNodeB side establishes M2 connection for the MBMS service; the eNodeB adds corresponding IP multicast through an M1 interface according to TNL information carried by the MBMS conversation starting request message, and prepares to receive conversation data of corresponding MBMS services from the MBMS GW; when the MBMS session start request message carries SC-PTM information, the eNodeB allocates PDSCH resources for SC-MTCH of the MBMS service in each cell indicated by a cell ID list contained in the SC-PTM information according to MBMS E-RAB QOS parameters contained in the SC-PTM information, and determines SC-MTCH configuration information of the MBMS service; distributing PDSCH resources for SC-MCCH bearing SC-MTCH configuration information of the MBMS service in each cell indicated by the cell ID list, and determining SC-MCCH configuration information; if the eNodeB allocates PDSCH resources for the SC-MCCH of a cell, the eNodeB evaluates whether the PDSCH resources allocated to the SC-MCCH are enough, and if the PDSCH resources are not enough, the eNodeB allocates PDSCH resources for the SC-MCCH again; for the SC-MCCH of each cell indicated by the cell ID list, determining information carried on the SC-MCCH; storing the configuration information of each SC-MTCH, the configuration information of each SC-MCCH and the information loaded on the SC-MCCH of each SC-MCCH, which are indicated by the cell ID list, of each cell;
x4, when the MCE receives the MBMS session starting request response message sent by the eNodeB, feeding back the MBMS session starting request response message to an MME;
x5, for the MBMS service, the MCE allocates air interface wireless resources for the MBMS service in each divided MBSFN area and each divided simulcast area, determines information carried on the MCCH of each divided MBSFN area and information carried on the simulcast SC-MCCH of each divided simulcast area, and allocates air interface wireless resources for the MCCH of each related MBSFN area and the simulcast SC-MCCH of each related simulcast area;
x6, for the MBMS service, the MCE sends a second dedicated signaling to the corresponding eNodeB, where the second dedicated signaling carries: the method comprises the steps of updating the MCCH, updating the simulcast SC-MCCH, carrying information on the MCCH of each related MBSFN area, carrying information on the simulcast SC-MCCH of each related simulcast area, carrying MCCH configuration information of each related MCCH and simulcast SC-MCCH configuration information of each related simulcast SC-MCCH;
x7, the eNodeB receives the second dedicated signaling sent by the MCE, stores all configuration information in the second dedicated signaling, and feeds back a corresponding response message to the MCE to indicate the eNodeB to complete the related configuration; for an MBSFN area, when the response message of the first special signaling and the second special signaling both carry the MCCH configuration information of the MBSFN area, replacing the MCCH configuration information of the MBSFN area in the response message of the first special signaling stored by the eNodeB by using the MCCH configuration information of the MBSFN area in the second special signaling; for a simulcast area, when the response message of the first dedicated signaling and the second dedicated signaling both carry the simulcast SC-MCCH configuration information of the simulcast area, the simulcast SC-MCCH configuration information of the simulcast area in the second dedicated signaling is used to replace the eNodeB to store the simulcast SC-MCCH configuration information of the simulcast area in the response message of the first dedicated signaling.
8. The method of claim 7, wherein x5 comprises:
the MCE distributes PMCH resources for the MTCH of the session of the MBMS service in each divided MBSFN area according to the saved MBMS E-RAB QoS parameters;
the MCE allocates PDSCH resources for the simulcast SC-MTCH of the session of the MBMS service in each divided simulcast region according to the saved MBMS E-RAB QoS parameters;
the MCE determines information carried on the MCCH of each divided MBSF area; the information carried on the MCCH of one MBSFN area is the configuration information of MTCH of each MBMS sent in the MBSFN area;
the MCE determines information carried on the simulcast SC-MCCH of each divided simulcast area; the information carried on the simulcast SC-MCCH of one simulcast area is the configuration information of the simulcast SC-MTCH of each MBMS service sent in the simulcast area;
for newly-built MBSFN areas in each divided MBSFN area, the MCE newly-builds an MCCH for the MBSFN area, allocates PMCH resources for the MCCH, and determines MCCH configuration information of the MBSFN area;
for newly-built simulcast areas in each divided simulcast area, the MCE newly-builds a simulcast SC-MCCH for the simulcast area, allocates PDSCH resources for the simulcast SC-MCCH, and determines simulcast SC-MCCH configuration information of the simulcast area;
for each MBSFN area established in each divided MBSFN area, the MCE evaluates whether PMCH resources allocated to the MCCH of the MBSFN area are enough or not according to information carried on the MCCH of the MBSFN area, if not, the MCE allocates PMCH resources for the MCCH of the MBSFN area again, and the MCCH configuration information of the MBSFN area is determined according to the newly allocated PMCH resources;
for each established simulcast region in each divided simulcast region, the MCE evaluates whether the PDSCH resources already allocated to the simulcast SC-MCCH of the simulcast region are enough or not according to the information carried on the simulcast SC-MCCH of the simulcast region, if not, the MCE allocates PDSCH resources for the simulcast SC-MCCH of the simulcast region again, and determines the simulcast SC-MCCH configuration information of the simulcast region according to the newly allocated PDSCH resources.
9. The method of claim 8, wherein the MCE allocates a same PMCH resource in each MBSFN area for the MTCH of the MBMS service;
and the MCE is the simulcast SC-MTCH of the MBMS service, and the same PDSCH resources are distributed in each simulcast region.
10. The method of claim 7, wherein the second dedicated signaling is an MBMS session scheduling information message; and the response message corresponding to the second dedicated signaling is an MBMS conversation scheduling information response message.
11. The method of claim 7, wherein the eNodeB sends the configuration information of the simulcast SC-MCCH through system broadcast, and sending the PDSCH corresponding to the corresponding SC-MCCH according to the configuration information of the simulcast SC-MCCH comprises:
y1, the eNodeB sending corresponding SIB messages in corresponding cells according to the stored MCCH configuration information of each MCCH and the simulcast SC-MCCH configuration information of each simulcast SC-MCCH; for the SC-MCCH configuration information of each SC-MCCH determined in step x3, the eNodeB transmits SIB20 in each corresponding cell;
y2, the eNodeB sends the corresponding MCCH and the corresponding simulcast SC-MCCH through the designated air interface resource at the designated time according to the stored information carried on the MCCH of each MBSFN area and the stored information carried on the simulcast SC-MCCH of each simulcast area; for the information carried on the SC-MCCH of each SC-MCCH determined in step x3, the eNodeB sends the corresponding SC-MCCH through the designated air interface resource;
y3, the eNodeB receives the data of the MBMS from the MBMS GW;
y4, the eNodeB determining the MTCH configuration information and the simulcast SC-MTCH configuration information of the specified MBMS according to the stored information loaded on the MCCH of each MBSFN area and the stored information loaded on the simulcast SC-MCCH of each simulcast area, sending the PMCH corresponding to the MTCH of the specified MBMS through the specified air interface resources in each corresponding cell, and sending the PDSCH corresponding to the simulcast SC-MTCH of the specified MBMS through the specified air interface resources in each corresponding cell; for the SC-MTCH configuration information of each SC-MTCH determined in step x3, the eNodeB sends the PDSCH corresponding to the SC-MTCH in each corresponding cell through the designated air interface resource.
12. The method of claim 11, wherein y1 comprises:
for each piece of stored MCCH configuration information, the eNodeB broadcasts the MCCH configuration information through SIB13 in each cell indicated by a cell ID list included in the MCCH configuration information;
for each stored simulcast SC-MCCH configuration information, the eNodeB broadcasts the simulcast SC-MCCH configuration information through SIB20 or newly added SIB in each cell indicated by a cell ID list included in the SC-MCCH configuration information;
when the eNodeB receives the SC-PTM information in step x3, the eNodeB broadcasts the SC-MCCH configuration information of each cell indicated by the cell ID list included in the SC-PTM information through SIB 20.
13. The method of claim 11, wherein y2 comprises:
the eNodeB sends a corresponding MCCH in each cell corresponding to each MBSFN area according to the time indicated by the stored MCCH updating time, wherein the information carried on the corresponding MCCH is determined by the information carried on the MCCH corresponding to the MCCH, and the air interface wireless resource adopted by the PMCH corresponding to the corresponding MCCH is determined by the MCCH configuration information corresponding to the MCCH;
the eNodeB sends corresponding simulcast SC-MCCHs in each cell corresponding to each simulcast area according to the time indicated by the stored simulcast SC-MCCH updating time, wherein the information carried on the corresponding simulcast SC-MCCH is determined by the information carried on the simulcast SC-MCCH corresponding to the simulcast SC-MCCH, and the air interface wireless resources adopted by the PDSCH corresponding to the corresponding simulcast SC-MCCH are determined by the simulcast SC-MCCH configuration information corresponding to the simulcast SC-MCCH;
and for the information carried on the SC-MCCH of each SC-MCCH determined in step x3, the eNodeB sends the corresponding SC-MCCH through the designated air interface resource.
14. The method of claim 11, wherein y4 comprises:
the eNodeB extracts MTCH configuration information of the MBMS from the stored information carried on the MCCH of any MBSFN area, and transmits the data of the MBMS through a corresponding PMCH according to the MTCH configuration information;
the eNodeB extracts simulcast SC-MTCH configuration information of the MBMS from the stored information carried on the simulcast SC-MCCH of any simulcast area, and transmits the data of the MBMS through a corresponding PDSCH according to the simulcast SC-MTCH configuration information;
for the SC-MTCH configuration information of each SC-MTCH determined in step x3, the eNodeB sends the PDSCH corresponding to the SC-MTCH in each corresponding cell through a designated air interface resource.
15. The method of claim 1, wherein the UE monitors a simulcast SC-MCCH in a cell according to the configuration information of the received simulcast SC-MCCH to obtain MBMS service configuration information sent in a simulcast SC-PTM manner, and receiving corresponding MBMS service data according to the MBMS service configuration information comprises:
z1, the UE receives the corresponding SIB message to obtain the configuration information of the control channel related to the MBMS service; in an accessed cell or a resident cell, the UE receives SIB13 to obtain configuration information of the MCCH of each MBSFN area, the UE receives SIB20 or a new SIB to obtain configuration information of a simulcast SC-MCCH of each simulcast area, and the UE receives SIB20 to obtain configuration information of the SC-MCCH;
z2, the UE receives the corresponding control channel according to the obtained configuration information of the control channel related to the MBMS service; the UE receives each MCCH, each simulcast SC-MCCH and SC-MCCH according to the MCCH configuration information of each MBSFN area, the simulcast SC-MCCH configuration information of each simulcast area and the SC-MCCH configuration information;
z3, the UE selects the MBMS service to be received, and receives the corresponding service channel according to the configuration information of the service channel of the MBMS service to obtain the data of the MBMS service.
16. The method of claim 15, wherein z3 comprises: the UE obtains each MBMS service broadcasted by the current cell according to each MTCH configuration information carried on each MCCH, each simulcast SC-MTCH configuration information carried on each simulcast SC-MCCH and each SC-MTCH configuration information carried on the SC-MCCH, selects one MBMS service from the MBMS services, and receives a corresponding service channel according to the service channel configuration information of the service to obtain the data of the service; and when the service channel corresponding to the selected MBMS is MTCH, simulcast SC-MTCH or SC-MTCH, the UE receives the corresponding service channel according to the corresponding MTCH configuration information, simulcast SC-MTCH configuration information or SC-MTCH configuration information so as to obtain the data of the MBMS.
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