CN102075868B - Multimedia broadcast multicast service (MBMS) data forwarding and transmitting method, device and system - Google Patents

Multimedia broadcast multicast service (MBMS) data forwarding and transmitting method, device and system Download PDF

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Publication number
CN102075868B
CN102075868B CN201110033044.0A CN201110033044A CN102075868B CN 102075868 B CN102075868 B CN 102075868B CN 201110033044 A CN201110033044 A CN 201110033044A CN 102075868 B CN102075868 B CN 102075868B
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information
mbms
sub
district
mcch
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CN102075868A (en
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焦斌
丁昱
潘学明
鲍炜
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China Academy of Telecommunications Technology CATT
Datang Mobile Communications Equipment Co Ltd
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China Academy of Telecommunications Technology CATT
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Priority to PCT/CN2012/070640 priority patent/WO2012100727A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0092—Indication of how the channel is divided
    • 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
    • H04W72/30—Resource management for broadcast services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery

Abstract

The invention relates to the field of mobile communication, in particular to a multimedia broadcast multicast service (MBMS) data forwarding and transmitting method, a device and a system, enabling a remote node (RN) to support MBMS data transmission and solving the problem that a user equipment (UE) cannot continuously receive MBMS data when the UE moves into an area covered by RN cells. The method comprises the following steps that the RN acquires MBMS configuration information and broadcasts; the RN receives and synchronously forwards orthogonal frequency division multiplexing (OFDM) symbols which are mapped to a physical layer by a multicast control channel (MCCH) according to the MBMS configuration information, and acquires MCCH information according to the OFDM symbols which are mapped to the physical layer by the MCCH; and the RN acquires multicast traffic channel (MTCH) scheduling information according to the MCCH information, receives and synchronously forwards OFDM symbols which are mapped to the physical layer by an MTCH according to the MTCH scheduling information, and acquires MTCH information according to the OFDM symbols which are mapped to the physical layer by the MTCH.

Description

A kind of forwarding of MBMS business datum, sending method, Apparatus and system
Technical field
The present invention relates to moving communicating field, particularly a kind of forwarding of MBMS business datum, sending method, Apparatus and system.
Background technology
At the GSM in future, for example in back three generations (B3G, Beyond Third Generation) or among the LTE-A, system will provide higher peak data rate and cell throughout, also need bigger bandwidth simultaneously.At present, the unassigned bandwidth below the 2GHz seldom, the part or all of bandwidth that the B3G system needs can only be on higher frequency range, for example 3GHz is above seeks.Frequency range is high more, and it is fast more that radio wave propagation is decayed, and transmission range is short more, therefore, under the same overlay area, guarantee continuous covering, needs more base station, because the base station has higher cost usually, therefore can increase the cost of arranging net.In order to solve arrange net cost and covering problem, each manufacturer and standardization body are incorporated into relaying in the cellular system, increase to cover.
Fig. 1 introduces the network architecture behind the RN (Relay Node, via node) for the LTE-A system, and RN is linked into core net through the Donor under the base station eNB (host) sub-district and core net does not have direct wireline interface, and each RN can control one or more sub-districts.Under this framework, the interface between UE and the RN is called the Uu mouth, and the interface between RN and the DeNB (base station) is called the Un mouth.In this network architecture, RN has dual identity: 1) RN has the identity of UE (User Equipment, subscriber equipment), and RN is similar to the start attaching process of UE when starting.RN has SGW/PGW (ServingGateway/PDN Gateway, gateway/packet data gateway) and the Control Node MME (MobilityManagement Entity, Mobility Management Entity) of oneself; 2) for the UE that inserts RN, RN has the identity of eNB, and the downlink data of UE need send to the serving BS (being RN) of UE from the SGW/PGW of UE, and RN issues UE on the Uu mouth.
MBMS (Multimedia Broadcast Multicast Service, multimedia broadcast-multicast service) is used to that the user provides multimedia broadcasting and multicast services in the wireless area.In the present LTE version, support that the LTE sub-district of MBMS can only be a MBMS/ clean culture mixed cell.Clean culture in the MBMS/ clean culture mixed cell and the transmission of MBMS business cooperation, some subframe are used for the professional transmission of MBMS, and other subframes are used for the unicast service transmission.The MBMS business can be carried out single cell transmission, also can carry out many cell transmission.The single cell transmission of MBMS is meant that MBMS only transmits in the coverage of a designated cell, do not support the combination from the MBMS transmission of many sub-districts; Many cell transmission of MBMS need be supported the MBSFN transmission means.
So-called MB SFN (Multimedia Broadcast multicast service Single FrequencyNetwork, multimedia broadcast multicast service Single Frequency Network) is meant at synchronization and carries out synchronous transmission with same frequency in a plurality of sub-districts.Use this transmission means can practice thrift frequency resource, improve the availability of frequency spectrum.It requires a plurality of sub-districts that identical content is sent simultaneously.Like this, UE just can be regarded as a big sub-district with a plurality of MBSFN sub-district.Therefore, UE not only can not receive the presence of intercell interference of neighbor cell transmission, and will benefit from the stack from the signal of a plurality of MBSFN sub-district.This multiple sectors at same keeps pouring in the defeated diversity that brings can also solve problems such as blind area covering, strengthens the reliability that receives, and improves coverage rate.
The technical characterstic of the many cell transmission of MBMS is following: the 1) synchronous transmission of MBMS in the MBSFN zone; 2) support the merging that many cell MBMSs transmit; 3) MTCH (Multicast Traffic Channel, multicast service channel) and MCCH (Multicast Control Channel, multicast control channel) channel Mapping are on MCH (Multicast Channel, the Multicast Channel) physical channel that is used for the PTM transmission; 4) the MBSFN retaining zone can semi-staticly dispose, as: through O&M; 5) logic channel of MBMS transmission has MCCH and MTCH, and MCCH is used for bearer control signalling, and MTCH is used for the bearer service data; Logic channel MCCH and MTCH are mapped on the transmission channel MCH, finally are mapped on the PMCH and transmit.
The indication of MBSFN subframe has three levels: the 1) maximum magnitude of SIB2 (System Information Block 2, system information block 2) indication MBSFN subframe, and the MBSFN subframe comprises the MBSFN subframe of functions such as being used for MBMS transmission, RN backhaul, location; 2) SIB13 (System InformationBlock 2; System information block 13); Carry the MCCH configuration information, be used to indicate that MBSFN subframe and each PMCH (Physical Multicast Channel, physical layer Multicast Channel) take subframe and dispatching cycle in the specific MBSFN zone; 3) MSI (MCH Scheduling Information, MCH schedule information), the actual MBMS that sends of scheduling is professional in the given MBSFN subframe scope of MCCH.The structure of MBSFN subframe is as shown in Figure 2 in the prior art, and eNB is configured to MBSFN Subframe with some subframe (Subframe) in each radio frames (Frame).Wherein, Each MBSFN Subframe separated into two parts again on time domain; Wherein, Ctrl among Normal Subframe and the MBSFN Subframe partly is allocated for the control character resource of unicast data transmission, and the MCCH+MTCH among the MBSFN Subframe partly is allocated for the PMCH resource, is used to transmit MTCH and MCCH data.
The MBMS system architecture is as shown in Figure 3.The M1 interface is a pure interface in the user plane that is defined between eNB and the MBMS GW, and the M1 interface provides the user plane data transfer of the non-assurance between MBMS GW and the eNB.The M2 interface is a chain of command interface that is defined between eNB and the MCE, and the M2 interface is mainly used in MBMS conversation management functional and MBMS schedule information supplying functional.The M3 interface is a chain of command interface that is defined between MME and the MCE, and the M3 interface is mainly used in the MBMS conversation management functional.
In the prior art, common eNB can be according to all the perhaps professional transmissions of part sub-district participation MBMS under the schedule information control eNB control of MCE.If but consider RN and the common eNB mixed deployment scene in network; RN does not support the transmission that MBMS is professional on the one hand; The main deployment of RN is to be used for expansion to cover (UE can only receive the signal from RN in expanded areas of coverage) on the other hand; Therefore, in case UE moves to the RN overlay area, will cause UE can not continue normally to receive the MBMS business.
Summary of the invention
The present invention provides a kind of retransmission method and device of MBMS business datum, makes RN can support the transmission of MBMS, is moving to the RN cell coverage area thereby solve UE, receives the successional problem of MBMS business datum.
The present invention also provides a kind of sending method and device of MBMS business datum, and DeNB can send to RN with MBSFN area configurations information, makes RN can obtain the MBMS configuration information, and supports the transmission of MBMS business datum.
A kind of retransmission method of MBMS business datum comprises:
RN obtains the MBMS configuration information, and broadcasts;
RN receives MCCH and is mapped to the OFDM symbol of physical layer and forwarding synchronously according to the MBMS configuration information, and is mapped to the OFDM symbol acquisition MCCH information of physical layer according to this MCCH;
RN receives MTCH according to the MTCH schedule information and is mapped to the OFDM symbol of physical layer and forwarding synchronously according to MCCH information acquisition MTCH schedule information, and is mapped to the OFDM symbol acquisition MTCH information of physical layer according to this MTCH.
A kind of sending method of MBMS business datum comprises:
DeNB sends MBSFN area configurations information, makes that RN can be according to MBSFN area configurations information acquisition MBMS configuration information;
DeNB MCCH information mapping that MBMS is corresponding is to the OFDM symbol of physical layer and in the transmission of eating dishes without rice or wine;
DeNB MTCH information mapping that MBMS is corresponding is to the OFDM symbol of physical layer and in the transmission of eating dishes without rice or wine.
A kind of via node RN comprises:
Configuration module is used to obtain the MBMS configuration information, and broadcasts;
OFDM symbol forwarding module is used for the configuration information according to MBMS, receives MCCH and is mapped to the OFDM symbol of physical layer and forwarding synchronously, and be mapped to the OFDM symbol acquisition MCCH information of physical layer according to this MCCH; According to MCCH information acquisition MTCH schedule information, receive MTCH according to the MTCH schedule information and be mapped to the OFDM symbol of physical layer and forwarding synchronously, and be mapped to the OFDM symbol acquisition MTCH information of physical layer according to this MTCH.
A kind of base station DeNB comprises:
The configuration information sending module is used to send MBSFN area configurations information, makes that RN can be according to MBSFN area configurations information acquisition MBMS configuration information;
OFDM symbol sending module is used for the MCCH information mapping that MBMS is corresponding to the OFDM symbol of physical layer and in the transmission of eating dishes without rice or wine; The MTCH information mapping that MBMS is corresponding is to the OFDM symbol of physical layer and in the transmission of eating dishes without rice or wine.
The transmitting system of a kind of MBMS comprises:
Base station DeNB is used to send MBSFN area configurations information, makes that RN can be according to MBSFN area configurations information acquisition MBMS configuration information, and the MCCH information mapping that MBMS is corresponding is to the OFDM symbol of physical layer and in the transmission of eating dishes without rice or wine; The MTCH information mapping that MBMS is corresponding is to the OFDM symbol of physical layer and in the transmission of eating dishes without rice or wine;
Via node RN is used to obtain the MBMS configuration information, and broadcasts; According to the MBMS configuration information, receive MCCH and be mapped to the OFDM symbol of physical layer and forwarding synchronously, and be mapped to the OFDM symbol acquisition MCCH information of physical layer according to this MCCH; According to MCCH information acquisition MTCH schedule information, receive MTCH according to the MTCH schedule information and be mapped to the OFDM symbol of physical layer and forwarding synchronously, and be mapped to the OFDM symbol acquisition MTCH information of physical layer according to this MTCH.
The retransmission method and the device of the MBMS business datum that the embodiment of the invention provides, RN can obtain the MBMS configuration information, and is broadcast to the UE in the RN coverage; RN can receive MCCH and the MTCH that send the base station simultaneously; And be transmitted to the UE in the RN coverage, therefore, make RN can support the transmission of MBMS; Thereby solve UE and moving to the RN cell coverage area, receive the successional problem of MBMS business datum.
The sending method and the device of the MBMS business datum that the embodiment of the invention provides; DeNB can send to RN with MBSFN area configurations information; Make RN can obtain the MBMS configuration information; And be broadcast to UE, and moving to the RN cell coverage area thereby solve UE, receive the successional problem of MBMS business datum.
Description of drawings
Fig. 1 introduces the network architecture behind the RN for the LTE-A system;
Fig. 2 is the structure of MBSFN subframe in the prior art;
Fig. 3 is the MBMS system architecture;
The retransmission method flow chart of the MBMS business datum that Fig. 4 provides for the embodiment of the invention;
The retransmission method flow chart of the MBMS business datum that Fig. 5 provides for the embodiment of the invention one;
The retransmission method flow chart of the MBMS business datum that Fig. 6 provides for the embodiment of the invention two;
The retransmission method flow chart of the MBMS business datum that Fig. 7 provides for the embodiment of the invention three;
The retransmission method flow chart of the MBMS business datum that Fig. 8 provides for the embodiment of the invention four;
The structure chart of the RN that Fig. 9 provides for the embodiment of the invention;
The structure chart of the DeNB that Figure 10 provides for the embodiment of the invention.
Embodiment
Do not support the forwarding of MBMS to make UE move to the RN overlay area to existing RN, can not continue normally to receive the professional problem of MBMS; The embodiment of the invention provides a kind of retransmission method of MBMS business datum; Make RN can obtain the MBMS configuration information of RN sub-district or Donor (host) sub-district, and be broadcast to the UE in the RN coverage that RN can receive the MBMS data and transmit synchronously simultaneously; Therefore; UE in the RN coverage can receive the MBMS data according to the MBMS configuration information, thereby makes UE moving to the RN cell coverage area, also can receive the MBMS business; Solve UE and moved to the RN overlay area, received the successional problem of MBMS business datum.
Before introducing specific embodiment of the present invention, introduce the several notions that relate in the embodiment of the invention earlier.
The MBMS configuration information is meant relevant configuration with MBMS, specifically comprises: the sub-frame information that MBMS takies, MBMS service area information, MBSFN area information, MCCH schedule information.
MBSFN area configurations information specifically is meant the resource that MBSFN uses, and the MBSFN sub-frame information that in embodiments of the present invention MBMS is taken, MBSFN area information and MCCH schedule information are referred to as MBSFN configuration information.
MBMS service area information, specifically the content with the MBMS service is relevant, and MBMS service area information is identical, and the MBMS service content that promptly in this zone, provides is identical.
As shown in Figure 4, the retransmission method flow chart of the MBMS business datum that provides for the embodiment of the invention specifically comprises:
S401, DeNB send MBSFN area configurations information, make that RN can be according to MBSFN area configurations information acquisition MBMS configuration information;
Wherein, MBSFN area configurations information comprises MBSFN sub-frame information, MBSFN area information, the MCCH schedule information that MBMS takies.
The MBMS configuration information specifically comprises: MBMS service area information and MBSFN area configurations information, promptly the MBMS configuration information comprises: the MBSFN sub-frame information that MBMS takies, MBSFN area information, MCCH schedule information, MBMS service area information.
Wherein, DeNB carries the MBMS configuration information of Donor sub-district through system broadcasts SIB2 and SIB13 among SIB2 and the SIB13, and RN receives the MBMS configuration information that broadcasting obtains the Donor sub-district; At this moment, the RN transmitting MBMS is sightless to DeNB;
DeNB can also pass through RRC (Radio Resource Control, Radio Resource control) dedicated signaling the MBMS configuration information of Donor sub-district is sent to RN, and RN directly obtains the MBMS configuration information of Donor sub-district;
DeNB can also send to RN with the MBSFN area configurations information of RN sub-district through the M2 interface; RN is according to the MBMS configuration information of the MBMS service area information acquisition RN sub-district of the RN sub-district of preserving in the MBSFN area configurations information of RN sub-district and the RN; At this moment, the RN transmitting MBMS is visible to DeNB; Certainly, DeNB also can be directly sends to RN through the M2 interface with the MBMS configuration information of RN sub-district, and this moment, RN directly obtained the MBMS configuration information of RN sub-district;
S402, RN obtain the MBMS configuration information, and broadcast;
Particularly, when identical MBMS configuration information was used with the Donor sub-district in the RN sub-district, then RN obtained the MBMS configuration information of Donor sub-district, and broadcasts.When different MBMS configuration informations was used with the Donor sub-district in the RN sub-district, then RN obtained the MBMS configuration information of RN sub-district, and broadcasts.
S403, DeNB MCCH information mapping that MBMS is corresponding is to OFDM (Orthogonal Frequency Division Multiplexing, the OFDM) symbol of physical layer and in the transmission of eating dishes without rice or wine;
S404, RN receive MCCH and are mapped to the OFDM symbol of physical layer and forwarding synchronously according to the MBMS configuration information, and are mapped to the OFDM symbol acquisition MCCH information of physical layer according to this MCCH;
S405, DeNB MTCH information mapping that MBMS is corresponding is to the OFDM symbol of physical layer and in the transmission of eating dishes without rice or wine;
S406, RN receive MTCH according to the MTCH schedule information and are mapped to the OFDM symbol of physical layer and forwarding synchronously according to MCCH information acquisition MTCH schedule information, and are mapped to the OFDM symbol acquisition MTCH information of physical layer according to this MTCH.
Specify method of the present invention through embodiment one, two, three, four below.Identical MBMS configuration information is used in RN sub-district and Donor sub-district among embodiment one and the embodiment two; Different MBMS configuration informations is used in RN sub-district and Donor sub-district among embodiment three and the embodiment four.
Embodiment one
RN is sightless to the forwarding of MBMS to DeNB among the embodiment one, and identical MBMS configuration information (being identical MBMS service area information and MBSFN area configurations information) is used with the Donor sub-district in the RN sub-district.RN obtains the MBMS configuration information of Donor sub-district, and directly is broadcast to UE through broadcast reception SIB2 and the SIB13 of DeNB.RN receives MBMS session relevant MCCH and MTCH information according to the MBMS configuration information simultaneously, and directly transmits, and accomplishes the forwarding of MBMS.
As shown in Figure 5, the retransmission method flow chart of the MBMS business datum that provides for the embodiment of the invention one specifically comprises:
S501, RN receive SIB2 and SIB13 through the system broadcasts of base station DeNB, obtain the MBMS configuration information of Donor sub-district;
Wherein, the MBMS configuration information specifically comprises: MBSFN sub-frame information, MBMS service area information, MBSFN area information, MCCH schedule information.MBMS service area information is identical to be meant that the MBMS business of the transmission in this service area is identical; The MBMS that MBMS service area information difference is then sent is professional different; The MBSFN area information specifically is meant the identical MBSFN resource of those sub-districts employings, and identical MBSFN area information then adopts identical MBSFN resource.Wherein, MBFSN sub-frame information, MBSFN area information, MCCH schedule information are referred to as MBSFN area configurations information.
RN is at system broadcasts reception SIB2 and the SIB13 of Un mouth through DeNB; Obtain the MBMS configuration information of Donor sub-district, specifically comprise: the professional MBSFN sub-frame information that takies, the MBMS service area information of Donor sub-district, the MBSFN area information and the MCCH schedule information of Donor sub-district of sending of the MBMS of Donor sub-district;
S502, RN broadcast the MBMS configuration information of Donor sub-district through SIB2 and SIB13;
RN is SIB2 and the SIB13 of the Donor cell MBMS configuration information that obtains among step S501 structure RN, and broadcasts at the Uu mouth; Therefore, the MBMS configuration information that SIB2 and the SIB13 of the interested UE of MBMS through the broadcasting of RN is obtained the Donor sub-district in the RN coverage.
S503, RN receive the OFDM symbol that MCCH is mapped to physical layer according to the MCCH schedule information in the MBMS configuration information of Donor sub-district;
DeNB sends the MCCH information mapping of Donor sub-district to the OFDM symbol of physical layer and eating dishes without rice or wine, wherein, RN receives the OFDM symbol that MCCH is mapped to physical layer according to the MCCH schedule information in the MBMS configuration information at the Un mouth;
This MCCH that S504, RN will receive is mapped to the OFDM sign synchronization of physical layer and transmits, and is mapped to the MCCH information of the OFDM symbol acquisition Donor sub-district of physical layer according to this MCCH;
After RN passes through certain physical layer signal processing procedure with this OFDM symbol; Constantly directly transmit at same OFDM symbol through the Uu mouth; Same OFDM symbol is meant constantly and receives and transmit this OFDM symbol at same OFDM symbol constantly; Make RN when receiving physical layer data, can transmit data synchronously; Same OFDM constantly promptly is the same subframe moment; And RN is mapped to physical layer OFDM symbol according to this MTCH and carries out the MCCH information that demodulation obtains the Donor sub-district;
Physical layer process is meant carries out processing such as filtering, amplification to signal, is similar to the function that existing repeater, L1 or L0repeater realizes.
The OFDM symbol that RN is mapped to this MCCH physical layer is transmitted to the UE in the RN coverage at the Uu mouth through the mode of broadcasting, and therefore, what the RN coverage was interior can receive this OFDM symbol to the interested UE of MBMS, and obtains the MCCH information of Donor sub-district;
S505, RN obtain the MTCH schedule information of Donor sub-district according to the MCCH information of Donor sub-district, and according to the MTCH schedule information of Donor sub-district, receive the OFDM symbol that MTCH is mapped to physical layer.
Wherein, comprise the MTCH schedule information of Donor sub-district in the MCCH information in the Donor sub-district that RN receives, RN is according to the MTCH schedule information of Donor sub-district, and the MTCH in the Donor sub-district that Un mouth reception DeNB sends is mapped to the OFDM symbol of physical layer;
This MTCH that S506, RN will receive is mapped to the OFDM sign synchronization of physical layer and transmits, and is mapped to the MTCH information of the OFDM symbol acquisition Donor sub-district of physical layer according to this MTCH;
After RN passes through certain physical layer signal processing procedure with this OFDM symbol; Constantly directly transmit at same OFDM symbol through the Uu mouth; Same OFDM symbol is meant constantly and receives and transmit this OFDM symbol at same OFDM symbol constantly; Make RN when receiving physical layer data, can transmit data synchronously; Same OFDM constantly promptly is the same subframe moment; And RN is mapped to physical layer OFDM symbol according to this MTCH and carries out the MTCH information that demodulation obtains the Donor sub-district;
The physical layer signal processing is meant carries out processing such as filtering, amplification to signal, is similar to the function that existing repeater, L1 or L0 repeater are realized.
The OFDM symbol that RN is mapped to this MTCH physical layer is transmitted to the UE in the RN coverage at the Uu mouth through the mode of broadcasting; Therefore; What the RN coverage was interior can receive this OFDM symbol that RN transmits to the interested UE of MBMS, and obtains the MTCH information of Donor sub-district.
Through above-mentioned steps, can make RN sub-district and Donor sub-district use identical MBMS configuration information, make the RN sub-district can transmit Donor cell MBMS configuration information, and receive the MBMS data (comprising MCCH information and MTCH information) of base station and transmit.
Embodiment two
RN is visible to the forwarding of MBMS to base station DeNB among the embodiment two; And identical MBMS configuration information is used with the Donor sub-district in the RN sub-district; In embodiment two; DeNB sends to RN with the MBMS configuration information of the Donor sub-district mode through the RRC dedicated signaling, so RN can inherit the MBMS configuration information of Donor sub-district, and is broadcast to the UE in the RN coverage.RN can receive the MCCH and the MTCH information of Donor sub-district according to the MBMS configuration information simultaneously, and directly transmits, and accomplishes the forwarding of MBMS.
As shown in Figure 6, the retransmission method flow chart of the MBMS business datum that provides for embodiment two specifically comprises:
The ability information whether S601, RN will support MBMS to transmit sends to DeNB;
The RRC that is initiated to DeNB at RN connects in the RN capability query process of the process of setting up or DeNB initiation, and whether RN will support that the MBMS forwarding information sends to DeNB;
During practical implementation, this step can not carry out yet, and the execution of step S601 can guarantee DeNB can know whether RN supports MBMS to transmit, and avoids DeNB to not supporting the RN that MBMS transmits to send information, causes the wasting of resources;
Whether S602, DeNB participate in the MBMS transmission through RRC dedicated signaling control RN;
When DeNB confirms that RN supports that MBMS transmits, can participate in MBMS through RRC dedicated signaling control RN and transmit; Certainly, DeNB can not participate in the MBMS forwarding through RRC dedicated signaling control RN yet;
During practical implementation, this step can not carry out yet, directly execution in step S603; Whether the execution of step S602 makes DeNB can directly control RN and participates in transmitting;
S603, DeNB send to RN through the RRC dedicated signaling with the MBMS configuration information of Donor sub-district;
When DeNB confirmed that RN supports that MBMS transmits, DeNB sent the MBMS configuration information of Donor sub-district to RN through the RRC dedicated signaling;
DeNB sends to RN through the RRC dedicated signaling with the message content of SIB13, wherein includes the MBMS configuration information of Donor sub-district in the message content of SIB13;
The MBMS configuration information of Donor sub-district comprises: the MBMS service area information of the MBSFN area configurations information of Donor sub-district and Donor sub-district, wherein the MBSFN area configurations information of Donor sub-district specifically comprises: the MBSFN sub-frame information that the MBMS business of Donor sub-district takies, the MBSFN area information of Donor sub-district and MCCH schedule information.
S604, DeNB send to RN through the message body content that comprises in the MCCH information of RRC dedicated signaling with the Donor sub-district;
During practical implementation, this step can not carry out, and the execution of step S604 can make RN receive the content of MCCH information as early as possible, and directly resolves acquisition MTCH schedule information; Then at subsequent step when RN receives MCCH information, directly transmit, do not need to resolve again and obtain the MTCH schedule information.
S605, RN broadcast the MBMS configuration information of the Donor sub-district that receives at the Uu mouth;
Wherein, RN constructs the SIB2 and the SIB13 of RN node according to the MBMS configuration information of the Donor sub-district that receives, and the UE in the Uu mouth is broadcast to the RN sub-district;
S606, RN receive the OFDM symbol that MCCH is mapped to physical layer according to the MBMS configuration information of Donor sub-district;
This MCCH that S607, RN will receive is mapped to the OFDM sign synchronization of physical layer and transmits, and is mapped to the MCCH information of the OFDM symbol acquisition Donor sub-district of physical layer according to this MCCH;
S608, RN be according to the MTCH schedule information of the Donor sub-district of the MCCH information acquisition of Donor sub-district, and receive according to the MTCH schedule information, receives the OFDM symbol that MTCH is mapped to physical layer;
This MTCH that S609, RN will receive is mapped to the OFDM sign synchronization of physical layer and transmits, and is mapped to the OFDM symbol acquisition MTCH information of physical layer according to this MTCH.
Wherein, the concrete grammar of step S606-S609 repeats no more referring to the description of embodiment one S503-S506 here.
Embodiment three
RN is visible to the forwarding of MBMS to base station DeNB among the embodiment three, and RN sub-district and the identical MBMS service area information of Donor sub-district use, and the MBSFN area configurations information of RN sub-district and Donor sub-district can be the same or different.In this embodiment; The configuration information that RN is relevant with MBMS with the RN sub-district sends to DeNB, and DeNB reports MCE with the RN sub-district as the part in the cell list of self, by MCE all sub-districts under the DeNB is carried out the MBSFN area configurations and is distributed the MCCH schedule information; DeNB sends to RN with the MBSFN area configurations information and the MCCH schedule information of RN sub-district; Therefore, RN can obtain the MBMS configuration information of RN sub-district, and can be broadcast to UE.RN can receive the relevant MBMS business datum of MBMS session, and transmit according to the MBMS configuration information simultaneously, accomplishes the forwarding of MBMS business datum.
As shown in Figure 7, the retransmission method flow chart of the MBMS that provides for the embodiment of the invention three specifically comprises:
S701, the configuration information that RN is relevant with MBMS with the RN sub-district send to base station DeNB;
Particularly, the configuration information that the RN sub-district is relevant with MBMS comprises: the MBSFN synchronization zone sign of RN sub-district ID, RN sub-district and the MBMS service area information of RN sub-district; RN specifically sends to DeNB through the M2 interface with the above-mentioned RN sub-district configuration information relevant with MBMS;
Particularly, RN initiates the process of setting up of M2 interface to DeNB in start-up course, and sets up the ID that carries the RN sub-district in the request, the MBSFN synchronization zone sign of RN sub-district and the MBMS service area information of RN sub-district at the M2 interface, sends to DeNB;
S702, DeNB send configuration update message to MCE, with the part of RN sub-district as self sub-district, and ID, MBSFN synchronization zone sign and the MBMS service area information of RN sub-district are sent to MCE;
Simultaneously, DeNB also will preserve the RN cell information that above-mentioned RN sends, i.e. RN sub-district ID, MBSFN synchronization zone sign, MBMS service area information;
S703, MCE upgrade the cell information relevant with DeNB, and carry out MBSFU area configurations renewal process;
Wherein, MCE selects some or all of DeNB control sub-district (comprising Donor sub-district and RN sub-district) down to carry out MBSFN according to self algorithm to send, and initiates the MBSFN area configurations renewal process to all participation MBSFN transmission sub-districts under the DeNB;
S704, MCE send to base station DeNB with the MBSFN area configurations information (being MBSFN sub-frame information, MBSFN area information and MCCH schedule information) of all or part sub-district under the DeNB control;
Its MBSFN sub-frame information, MBSFN area information and preservation of MCCH schedule information of sub-district down that S705, DeNB will receive, and wherein the MBSFN area configurations information of RN sub-district (comprising: the MBSFN sub-frame information of MBMS, MBSFN area information and MCCH schedule information) sends to corresponding RN;
MBSFN sub-frame information, MBSFN area information and MCCH schedule information that DeNB sets up in the response message the RN sub-district at the M2 interface send to corresponding RN;
Certainly, the M2 interface is set up the MBMS service area configuration information that can also comprise the RN sub-district in the response message;
S706, RN obtain the MBMS configuration information of RN sub-district;
RN obtains the MBMS configuration information of RN sub-district according to MBSFN sub-frame information, MBSFN area information, the MCCH schedule information of the MBMS service area information of RN sub-district and reception;
Wherein, the MBMS service area information of RN sub-district can be directly to be kept among the RN, also can set up response message at the M2 interface by DeNB and carry and send to RN;
S707, RN broadcast the MBMS configuration information of RN sub-district through SIB2 and SIB13;
RN is SIB2 and the SIB13 of the RN cell MBMS configuration information structure RN that obtains, and broadcasts at the Uu mouth; Therefore, the MBMS configuration information that SIB2 and the SIB13 of the interested UE of MBMS through the broadcasting of RN is obtained the RN sub-district in the RN coverage.
S708, through DeNB agency, RN accomplishes the MBMS session that is triggered by MCE and begins flow process;
Particularly, MCE sends the MBMS session to the base station and begins request, and the base station begins request with the MBMS session and sends to RN; RN returns session and sets up response, and DeNB receives and returns to MCE again after response is set up in session, therefore through the agent functionality of DeNB, accomplishes the MBMS session between RN and the MCE and begins flow process.
S709, through DeNB agency, RN obtains the MBMS schedule information of being distributed for the MBMS session by MCE;
Because the MBMS service area information of RN sub-district and Donor sub-district is identical, therefore, DeNB directly transmits the MBMS schedule information of session and gets final product;
MCE is that this MBMS session distributes corresponding MBMS schedule information, and is transmitted to RN by DeNB; The MBMS schedule information specifically is meant: the relevant schedule information of MTCH transmission is carried out in the RN sub-district.
How to accomplish session among concrete step S408 and the S409 between RN and the MCE and begin flow process and RN and obtain to carry out the relevant schedule information of MTCH transmission, belong to prior art, be not described in detail here by the RN sub-district that MCE distributes.
S710, RN be according to the MBMS configuration information of RN sub-district, and the MCCH that receives the RN sub-district that DeNB sends is mapped to the OFDM symbol of physical layer;
Wherein, comprise the MCCH schedule information of RN sub-district in the MBMS configuration information of RN sub-district, RN is mapped to the OFDM symbol of physical layer according to the MCCH of MCCH schedule information reception RN sub-district;
This MCCH that S711, RN will receive is mapped to the OFDM sign synchronization of physical layer and transmits, and is mapped to the MCCH information of the OFDM symbol acquisition RN sub-district of physical layer according to this MCCH;
After RN is mapped to the OFDM symbol process certain physical layer signal processing procedure of physical layer with this MCCH; Constantly directly transmit at same OFDM symbol through the Uu mouth; Same OFDM symbol is meant constantly and receives and transmit this OFDM symbol at same OFDM symbol constantly; Make RN when receiving physical layer data, can transmit data synchronously; And RN is mapped to physical layer OFDM symbol according to this MCCH and carries out the MCCH information that demodulation obtains the RN sub-district;
Physical layer process is meant carries out processing such as filtering, amplification to signal, is similar to the function that existing repeater, L1 or L0 repeater are realized.
RN is transmitted to UE RN coverage at the Uu mouth through the mode of broadcasting with this OFDM symbol, and therefore, what the RN coverage was interior can receive this OFDM symbol that RN transmits according to the MCCH schedule information in the MBMS configuration information to the interested UE of MBMS;
S712, RN obtain the MTCH schedule information of RN sub-district according to the MCCH information of RN sub-district, and according to the MTCH schedule information, receive the OFDM symbol that MTCH is mapped to physical layer;
Wherein, comprise the MTCH schedule information of RN sub-district in the MCCH information in the RN sub-district that RN obtains, RN is according to the MTCH schedule information of RN sub-district, and the MTCH in Un mouth reception RN sub-district is mapped to the OFDM symbol of physical layer;
This MTCH that S713, RN will receive is mapped to the OFDM sign synchronization of physical layer and transmits, and is mapped to the MTCH information of the OFDM symbol acquisition RN sub-district of physical layer according to this MTCH;
After RN passes through certain physical layer signal processing procedure with this OFDM symbol; Constantly directly transmit at same OFDM symbol through the Uu mouth; Same OFDM symbol is meant constantly and receives and transmit this OFDM symbol at same OFDM symbol constantly; Make RN when receiving physical layer data, can transmit data synchronously; And RN is mapped to physical layer OFDM symbol according to this MTCH and carries out the MTCH information that demodulation obtains the RN sub-district;
The physical layer signal processing is meant carries out processing such as filtering, amplification to signal, is similar to the function that existing repeater, L1 or L0 repeater are realized.
The OFDM symbol that RN is mapped to this MTCH physical layer is transmitted to the UE in the RN coverage at the Uu mouth through the mode of broadcasting; Therefore; What the RN coverage was interior can receive this OFDM symbol that RN transmits to the interested UE of MBMS, and obtains the MTCH information of RN sub-district.
Pass through above-mentioned steps; Make the RN sub-district to use identical MBMS service area configuration information with the Donor sub-district; Make that the RN sub-district can be as the part of DeNB sub-district, the MBSFN area configurations information of distributing the RN sub-district by MCE, and be transmitted to RN by the base station; And then RN can obtain the MBMS data (comprising MCCH information and MTCH information) of RN sub-district, and is transmitted to UE.
Embodiment four
RN is visible to the forwarding of MBMS to base station DeNB among the embodiment four, and the MBMS service area configuration different with the use of Donor sub-district of RN sub-district, and the MBSFN area configurations of RN sub-district and Donor sub-district can be the same or different.Embodiment four and embodiment three are that RN sends to DeNB with the RN cell information equally, send to MCE by DeNB, and MCE carries out the MBSFN area configurations with the RN sub-district as the part of DeNB sub-district.Be that with the different of embodiment three set up in the process of session at MCE and RN, DeNB filters the MBMS session, only the MBMS session relevant with RN sent to RN.
As shown in Figure 8, the forwarding process figure of the MBMS that provides for the embodiment of the invention four specifically comprises:
S801, the configuration information that RN is relevant with MBMS with the RN sub-district send to base station DeNB;
Particularly, the configuration information that the RN sub-district is relevant with MBMS comprises: the MBSFN synchronization zone sign of RN sub-district ID, RN sub-district and the MBMS service area information of RN sub-district; RN specifically sends to DeNB through the M2 interface with the above-mentioned RN sub-district configuration information relevant with MBMS;
Particularly, RN initiates the process of setting up of M2 interface to DeNB in start-up course, and sets up the MBSFN synchronization zone sign and the MBMS service area information of carrying RN sub-district ID, RN sub-district in the request at the M2 interface, and sends to DeNB;
S802, DeNB send configuration update message to MCE, with the part of RN sub-district as self sub-district, and ID, MBSFN synchronization zone sign and the MBMS service area information of RN sub-district are sent to MCE;
Simultaneously, DeNB also will preserve the RN cell information that above-mentioned RN sends, i.e. RN sub-district ID, MBSFN synchronization zone sign, MBMS service area information;
S803, MCE upgrade the cell information relevant with DeNB, and carry out MBSFU area configurations renewal process;
Wherein, MCE selects some or all of DeNB control sub-district (comprising Donor sub-district and RN sub-district) down to carry out MBSFN according to self algorithm to send, and initiates the MBSFN area configurations renewal process to all participation MBSFN transmission sub-districts under the DeNB;
S804, MCE send to base station DeNB with the MBSFN area configurations information (being MBSFN sub-frame information, MBSFN area information and MCCH schedule information) of all or part sub-district under the DeNB control;
Its MBSFN sub-frame information, MBSFN area information and preservation of MCCH schedule information of sub-district down that S805, DeNB will receive, and wherein the MBSFN area configurations information of RN sub-district (comprising: MBSFN sub-frame information, MBSFN area configurations information and MCCH schedule information) sends to corresponding RN;
MBSFN sub-frame information, MBSFN area configurations information and MCCH schedule information that DeNB sets up in the response message the RN sub-district at the M2 interface send to corresponding RN;
Certainly, the M2 interface is set up the MBMS service area information that can also comprise the RN sub-district in the response message;
S806, RN obtain the MBMS configuration information of RN sub-district;
RN obtains the MBMS configuration information of RN sub-district according to MBSFN sub-frame information, MBSFN area information, the MCCH schedule information of the MBMS of the MBMS service area information of RN sub-district and reception;
Wherein, the MBMS service area information of RN sub-district can be directly to be kept among the RN, also can set up response message at the M2 interface by DeNB and carry and send to RN;
S807, RN broadcast the MBMS configuration information of RN sub-district through SIB2 and SIB13;
RN constructs SIB2 and SIB13 with the RN cell MBMS configuration information that obtains, and broadcasts at the Uu mouth; Therefore, the MBMS configuration information that SIB2 and the SIB13 of the interested UE of MBMS through the broadcasting of RN is obtained the RN sub-district in the RN coverage.
S808a, MCE initiate the MBMS session and begin flow process, send the MBMS session of RN sub-district and Donor sub-district to DeNB;
S808b, DeNB are transmitted to RN with the MBMS session of RN sub-district in all MBMS sessions of MCE transmission;
Wherein, DeNB according to the MBMS service area information of carrying in the MBMS session will be identical with the service area information of RN sub-district MBMS session (being the MBMS session of RN sub-district) be transmitted to RN;
S808c, RN return conversational response message, and are transmitted to MCE through DeNB, therefore, have accomplished the relevant MBMS session of RN between MCE and the RN and have begun flow process;
MCE receives conversational response, and sets up the MBMS session of RN sub-district between the RN;
S809a, MCE are that the MBMS session of RN sub-district and Donor sub-district distributes the MBMS schedule information, and send to DeNB;
S809b, the MBMS schedule information that DeNB is corresponding with the MBMS session of RN sub-district are transmitted to RN;
Wherein, the MBMS session that DeNB participates in according to RN sub-district needs, the relevant schedule information of MTCH transmission that will be relevant with RN is transmitted to RN;
S810, RN be according to the MBMS configuration information of RN sub-district, receive the RN sub-district of sending the base station MCCH be mapped to the OFDM symbol of physical layer;
Wherein, comprise the MCCH schedule information of RN sub-district in the MBMS configuration information of RN sub-district, RN is mapped to the OFDM symbol of physical layer according to the MCCH of MCCH schedule information reception RN sub-district;
This MCCH that S811, RN will receive is mapped to the OFDM sign synchronization of physical layer and transmits, and is mapped to the MCCH information of the OFDM symbol acquisition RN sub-district of physical layer according to this MCCH;
After RN is mapped to the OFDM symbol process certain physical layer signal processing procedure of physical layer with this MCCH; Constantly directly transmit at same OFDM symbol through the Uu mouth; Same OFDM symbol is meant constantly and receives and transmit this OFDM symbol at same OFDM symbol constantly; Make RN when receiving physical layer data, can transmit data synchronously; And RN is mapped to physical layer OFDM symbol according to this MCCH and carries out the MCCH information that demodulation obtains the RN sub-district;
The physical layer signal processing is meant carries out processing such as filtering, amplification to signal, is similar to the function that existing repeater, L1 or L0 repeater are realized.
RN is transmitted to the UE in the RN coverage with this OFDM symbol in the mode of Uu mouth through broadcasting, therefore, in the RN coverage can be to the interested UE of MBMS according to the MCCH schedule information in the MBMS configuration information, receive that RN transmits this OFDM symbol;
S812, RN obtain the MTCH schedule information of RN sub-district according to the MCCH information of RN sub-district, and according to the MTCH schedule information, receive the base station and send the OFDM symbol that MTCH is mapped to physical layer;
Wherein, comprise the MTCH schedule information of RN sub-district in the MCCH information in the RN sub-district that RN obtains, RN is according to the MTCH schedule information of RN sub-district, and the MTCH in Un mouth reception RN sub-district is mapped to the OFDM symbol of physical layer;
This MTCH that S813, RN will receive is mapped to the OFDM sign synchronization of physical layer and transmits, and is mapped to the MTCH information of the OFDM symbol acquisition RN sub-district of physical layer according to this MTCH;
RN will receive OFDM symbol that this MTCH is mapped to physical layer through certain physical layer signal processing procedure after; Constantly directly transmit at same OFDM symbol through the Uu mouth; Same OFDM symbol is meant constantly and receives and transmit this OFDM symbol at same OFDM symbol constantly; Make RN when receiving physical layer data, can transmit data synchronously; And RN is mapped to physical layer OFDM symbol according to this MTCH and carries out the MTCH information that demodulation obtains the RN sub-district;
The physical layer signal processing is meant carries out processing such as filtering, amplification to signal, is similar to the function that existing repeater, L1 or L0 repeater are realized.
The OFDM symbol that RN is mapped to this MTCH physical layer is transmitted to the UE in the RN coverage at the Uu mouth through the mode of broadcasting; Therefore; What the RN coverage was interior can receive this OFDM symbol that RN transmits to the interested UE of MBMS, and obtains the MTCH information of RN sub-district.
The embodiment of the invention also provides a kind of via node RN, and is as shown in Figure 9, comprising:
Configuration module 91 is used to obtain the MBMS configuration information, and broadcasts;
OFDM symbol forwarding module 92 is used for the configuration information according to MBMS, receives MCCH and is mapped to the OFDM symbol of physical layer and forwarding synchronously, and be mapped to the OFDM symbol acquisition MCCH information of physical layer according to this MCCH; According to MCCH information acquisition MTCH schedule information, receive MTCH according to the MTCH schedule information and be mapped to the OFDM symbol of physical layer and forwarding synchronously, and be mapped to the OFDM symbol acquisition MTCH information of physical layer according to this MTCH.
Wherein, the MBMS configuration information specifically comprises: the MBSFN sub-frame information that MBMS takies, MBMS service area information, MBSFN area information, MCCH schedule information.
Preferably, when identical MBMS configuration information was used with the Donor sub-district in the RN sub-district, then configuration module 91, specifically are used to obtain the MBMS configuration information of Donor sub-district, and broadcast.
Preferably; Configuration module 91; Specifically be used for receiving SIB2 and SIB13, obtain the MBMS configuration information of Donor sub-district, and broadcast at the Uu mouth according to SIB2 and the SIB13 of the MBMS configuration information structure RN of Donor sub-district in the system broadcasts of Un mouth through base station DeNB.
Preferably, configuration module 91 specifically is used to receive the MBMS configuration information of the Donor sub-district that base station DeNB sends through the RRC dedicated signaling, and broadcasts at the Uu mouth according to SIB2 and the SIB13 of the MBMS configuration information structure RN of Donor sub-district.
Preferably, when different MBMS configuration informations was used with the Donor sub-district in the RN sub-district, then said configuration module 91 specifically was used to obtain the MBMS configuration information of RN sub-district, and broadcasts.
Preferably, configuration module 91 specifically is used for ID, MBSFN synchronization zone sign and the MBMS service area information of RN sub-district are sent to base station DeNB; Receive professional sub-frame information, MBSFN area information, the MCCH schedule information of MBMS of the RN sub-district that DeNB sends, obtain the MBMS configuration information of RN sub-district, and broadcast at the Uu mouth according to SIB2 and the SIB13 of the MBMS configuration information structure RN of RN sub-district.
Preferably; OFDM symbol forwarding module 92; Specifically be used for MCCH schedule information, receive the OFDM symbol that MCCH is mapped to physical layer, and this OFDM symbol is handled the back through physical layer signal transmit synchronously constantly at same OFDM symbol according to the MBMS configuration information; Be mapped to physical layer OFDM symbol according to this MCCH and carry out demodulation acquisition MCCH information; And
According to MCCH information acquisition MTCH schedule information, receive the OFDM symbol that MTCH is mapped to physical layer according to the MTCH schedule information, and this OFDM symbol is handled the back through physical layer signal transmit synchronously constantly at same OFDM symbol; Be mapped to physical layer OFDM symbol according to this MTCH and carry out demodulation acquisition MTCH information.
The embodiment of the invention also provides a kind of base station DeNB, and is shown in figure 10, comprising:
Configuration information sending module 101 is used to send MBSFN area configurations information, makes that RN can be according to MBSFN area configurations information acquisition MBMS configuration information;
OFDM symbol sending module 102 is used for the MCCH information mapping that MBMS is corresponding to the OFDM symbol of physical layer and in the transmission of eating dishes without rice or wine; The MTCH information mapping that MBMS is corresponding is to the OFDM symbol of physical layer and in the transmission of eating dishes without rice or wine.
Wherein, said MBMS configuration information specifically comprises: MBSFN area configurations information and MBMS service area information, said MBSFN area configurations information specifically comprises: the MBSFN sub-frame information that MBMS takies, MBSFN area information, MCCH schedule information.
Preferably; When identical MBMS configuration information is used with the Donor sub-district in the RN sub-district; Then the configuration information sending module 101; Specifically be used for sending the MBMS configuration information of Donor sub-district to RN, wherein comprise the MBSFN area configurations information and the MBMS service area information of Donor sub-district in the MBMS configuration information of Donor sub-district through the RRC dedicated signaling.
Preferably, when different MBMS configuration informations was used with the Donor sub-district in the RN sub-district, then the configuration information sending module 101, specifically were used for the MBSFN sub-frame information, MBSFN area information, the MCCH schedule information that take to the MBMS of RN transmission RN sub-district.
Preferably, when different MBMS service area information was used with the Donor sub-district in the RN sub-district, configuration information sending module 101 also was used to receive the RN sub-district of MCE transmission and the MBMS session of Donor sub-district, and the MBMS session of RN sub-district is transmitted to RN; Receiving MCE is the MBMS schedule information of the MBMS session distribution of RN sub-district and Donor sub-district, and the MBMS schedule information that the MBMS session of RN sub-district is corresponding sends to RN.
The embodiment of the invention also provides the transmitting system of a kind of MBMS, comprises above-mentioned base station DeNB and RN; Wherein:
Base station DeNB is used to send MBSFN area configurations information, makes that RN can be according to MBSFN area configurations information acquisition MBMS configuration information, and the MCCH information mapping that MBMS is corresponding is to the OFDM symbol of physical layer and in the transmission of eating dishes without rice or wine; The MTCH information mapping that MBMS is corresponding is to the OFDM symbol of physical layer and in the transmission of eating dishes without rice or wine;
Via node RN is used to obtain the MBMS configuration information, and broadcasts; According to the MBMS configuration information, receive MCCH and be mapped to the OFDM symbol of physical layer and forwarding synchronously, and be mapped to the OFDM symbol acquisition MCCH information of physical layer according to this MCCH; According to MCCH information acquisition MTCH schedule information, receive MTCH according to the MTCH schedule information and be mapped to the OFDM symbol of physical layer and forwarding synchronously, and be mapped to the OFDM symbol acquisition MTCH information of physical layer according to this MTCH.
The concrete implementation of the DeNB that the embodiment of the invention provides, RN and transmitting system can be not described in detail referring to method embodiment here.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.

Claims (32)

1. the retransmission method of a MBMS business datum is characterized in that, comprising:
Via node RN obtains multimedia broadcast-multicast service MBMS configuration information, and broadcasts;
RN receives multicast control channel MCCH and is mapped to the orthogonal frequency division multiplex OFDM symbol of physical layer and forwarding synchronously according to the MBMS configuration information, and is mapped to the OFDM symbol acquisition MCCH information of physical layer according to this MCCH;
RN receives MTCH according to the MTCH schedule information and is mapped to the OFDM symbol of physical layer and forwarding synchronously according to MCCH information acquisition multicast service channel MTCH schedule information, and is mapped to the OFDM symbol acquisition MTCH information of physical layer according to this MTCH.
2. the method for claim 1 is characterized in that, said MBMS configuration information specifically comprises: multimedia broadcast multicast service Single Frequency Network MBSFN sub-frame information, MBMS service area information, MBSFN area information, MCCH schedule information that MBMS takies.
3. method as claimed in claim 2 is characterized in that, when identical MBMS configuration information was used with host Donor sub-district in the RN sub-district, then RN obtained the MBMS configuration information of Donor sub-district, and broadcasts.
4. method as claimed in claim 3 is characterized in that, said RN obtains the MBMS configuration information of Donor sub-district, and broadcasts, and is specially:
RN obtains the MBMS configuration information of Donor sub-district at the system broadcasts receiving system block of information SIB2 and the SIB13 of Un mouth through base station DeNB, and broadcasts at the Uu mouth according to SIB2 and the SIB13 of the MBMS configuration information structure RN of Donor sub-district.
5. method as claimed in claim 3 is characterized in that, said RN obtains the MBMS configuration information of Donor sub-district, and broadcasts, and is specially:
RN receives the MBMS configuration information of the Donor sub-district that base station DeNB sends through the radio resource control RRC dedicated signaling, and broadcasts at the Uu mouth according to SIB2 and the SIB13 of the MBMS configuration information structure RN of Donor sub-district.
6. method as claimed in claim 5 is characterized in that, said RN obtains also to comprise before the MBMS configuration information of Donor sub-district:
The ability information whether RN will support MBMS to transmit sends to DeNB.
7. method as claimed in claim 2 is characterized in that, when different MBMS configuration informations was used with the Donor sub-district in the RN sub-district, then RN obtained the MBMS configuration information of RN sub-district, and broadcasts.
8. method as claimed in claim 7 is characterized in that, said RN obtains the MBMS configuration information of RN sub-district, and broadcasts, and is specially:
RN sends to base station DeNB with sign ID, MBSFN synchronization zone sign and the MBMS service area information of RN sub-district;
RN receives professional sub-frame information, MBSFN area information, the MCCH schedule information of MBMS of the RN sub-district that DeNB sends, and obtains the MBMS configuration information of RN sub-district, and broadcasts at the Uu mouth according to SIB2 and the SIB13 of the MBMS configuration information structure RN of RN sub-district.
9. method as claimed in claim 8 is characterized in that, said RN specifically sends to base station DeNB through the M2 interface with the ID of RN sub-district, MBSFN synchronization zone sign and MBMS service area information; And
RN receives MBMS professional sub-frame information, MBSFN area information, the MCCH schedule information of DeNB through the RN sub-district of M2 interface transmission.
10. the method for claim 1 is characterized in that, said RN receives MCCH and is mapped to the OFDM symbol of physical layer and forwarding synchronously according to the MBMS configuration information, and according to the OFDM symbol acquisition MCCH information that this MCCH is mapped to physical layer, is specially:
RN receives the OFDM symbol that MCCH is mapped to physical layer according to the MCCH schedule information in the MBMS configuration information, and this OFDM symbol is handled the back through physical layer signal transmit synchronously constantly at same OFDM symbol;
RN is mapped to physical layer OFDM symbol according to this MCCH and carries out demodulation acquisition MCCH information.
11. the method for claim 1; It is characterized in that RN receives MTCH according to the MTCH schedule information and is mapped to the OFDM symbol of physical layer and forwarding synchronously according to MCCH information acquisition MTCH schedule information; And, be specially according to the OFDM symbol acquisition MTCH information that this MTCH is mapped to physical layer:
RN receives the OFDM symbol that MTCH is mapped to physical layer according to MCCH information acquisition MTCH schedule information according to the MTCH schedule information, and this OFDM symbol is handled the back through physical layer signal transmit synchronously constantly at same OFDM symbol;
RN is mapped to physical layer OFDM symbol according to this MTCH and carries out demodulation acquisition MTCH information.
12. the sending method of a MBMS business datum is characterized in that, comprising:
Base station DeNB sends multimedia broadcast multicast service Single Frequency Network MBSFN area configurations information, makes that via node RN can be according to MBSFN area configurations information acquisition multimedia broadcast-multicast service MBMS configuration information;
DeNB multicast control channel information MCCH information mapping that MBMS is corresponding is to the orthogonal frequency division multiplex OFDM symbol of physical layer and in the transmission of eating dishes without rice or wine;
DeNB multicast service channel MTCH information mapping that MBMS is corresponding is to the OFDM symbol of physical layer and in the transmission of eating dishes without rice or wine.
13. method as claimed in claim 12; It is characterized in that; Said MBMS configuration information specifically comprises: MBSFN area configurations information and MBMS service area information, said MBSFN area configurations information specifically comprises: the MBSFN sub-frame information that MBMS takies, MBSFN area information, MCCH schedule information.
14. method as claimed in claim 13 is characterized in that, when identical MBMS configuration information was used with host Donor sub-district in the RN sub-district, then DeNB transmission MBSFN area configurations information was specially:
DeNB sends the MBMS configuration information of Donor sub-district through the radio resource control RRC dedicated signaling to RN, wherein comprises the MBSFN area configurations information and the MBMS service area information of Donor sub-district in the MBMS configuration information of Donor sub-district.
15. method as claimed in claim 14 is characterized in that, said DeNB sends to RN before the MBMS configuration information of Donor sub-district through the radio resource control RRC dedicated signaling, also comprises:
DeNB receives the ability information of whether supporting the MBMS forwarding that RN sends; And
Said DeNB is specially to the MBMS configuration information that RN sends the Donor sub-district through the RRC dedicated signaling:
When said DeNB supports that as definite RN MBMS transmits, send the MBMS configuration information of Donor sub-district to RN through the RRC dedicated signaling; Perhaps
When said DeNB supports that as definite RN MBMS transmits, participate in MBMS through RRC dedicated signaling control RN and transmit, and send the MBMS configuration information of Donor sub-district to RN through the RRC dedicated signaling.
16. method as claimed in claim 13 is characterized in that, when different MBMS configuration informations was used with the Donor sub-district in the RN sub-district, then DeNB transmission MBSFN area configurations information was specially:
MBSFN sub-frame information, MBSFN area information, MCCH schedule information that said DeNB takies to the MBMS of RN transmission RN sub-district.
17. method as claimed in claim 16 is characterized in that, said DeNB also comprised before RN sends MBSFN sub-frame information that the MBMS of RN sub-district takies, MBSFN area information, MCCH schedule information:
DeNB receives sign ID, MBSFN synchronization zone sign and the MBMS service area information of the RN sub-district of RN transmission;
DeNB is the part of RN sub-district as self sub-district, and ID, MBSFN synchronization zone sign and the MBMS service area information of RN sub-district is sent to many sub-districts coordination entity MCE;
DeNB receives professional sub-frame information, MBSFN area information, the MCCH schedule information of MBMS of the RN sub-district that many sub-districts coordination entity MCE returns.
18. method as claimed in claim 16 is characterized in that, when different MBMS service area information was used in RN sub-district and Donor sub-district, said DeNB MCCH information mapping that MBMS is corresponding also comprised to the OFDM symbol of physical layer and before the transmission of eating dishes without rice or wine:
DeNB receives the RN sub-district of many sub-districts coordination entity MCE transmission and the MBMS session of Donor sub-district, and the MBMS session of RN sub-district is transmitted to RN;
DeNB receives the MBMS schedule information that many sub-districts coordination entity MCE is the MBMS session distribution of RN sub-district and Donor sub-district, and the MBMS schedule information that the MBMS session of RN sub-district is corresponding sends to RN.
19. a via node RN is characterized in that, comprising:
Configuration module is used to obtain multimedia broadcast-multicast service MBMS configuration information, and broadcasts;
Orthogonal frequency division multiplex OFDM symbol forwarding module is used for the configuration information according to MBMS, receives multicast control channel MCCH and is mapped to the OFDM symbol of physical layer and forwarding synchronously, and be mapped to the OFDM symbol acquisition MCCH information of physical layer according to this MCCH; According to MCCH information acquisition multicast service channel MTCH schedule information, receive MTCH according to the MTCH schedule information and be mapped to the OFDM symbol of physical layer and forwarding synchronously, and be mapped to the OFDM symbol acquisition MTCH information of physical layer according to this MTCH.
20. RN as claimed in claim 19 is characterized in that, said MBMS configuration information specifically comprises: multimedia broadcast multicast service Single Frequency Network MBSFN sub-frame information, MBMS service area information, MBSFN area information, MCCH schedule information that MBMS takies.
21. RN as claimed in claim 20 is characterized in that, when identical MBMS configuration information was used with host Donor sub-district in the RN sub-district, then said configuration module specifically was used to obtain the MBMS configuration information of Donor sub-district, and broadcasts.
22. RN as claimed in claim 21; It is characterized in that; Said configuration module; Specifically be used for obtaining the MBMS configuration information of Donor sub-district, and broadcast at the Uu mouth according to SIB2 and the SIB13 of the MBMS configuration information structure RN of Donor sub-district at the system broadcasts receiving system block of information SIB2 and the SIB13 of Un mouth through base station DeNB.
23. RN as claimed in claim 21; It is characterized in that; Said configuration module; Specifically be used to receive the MBMS configuration information of the Donor sub-district that base station DeNB sends through the radio resource control RRC dedicated signaling, and broadcast at the Uu mouth according to SIB2 and the SIB13 of the MBMS configuration information structure RN of Donor sub-district.
24. RN as claimed in claim 20 is characterized in that, when different MBMS configuration informations was used with the Donor sub-district in the RN sub-district, then said configuration module specifically was used to obtain the MBMS configuration information of RN sub-district, and broadcasts.
25. RN as claimed in claim 24 is characterized in that, said configuration module specifically is used for the sign ID of RN sub-district, MBSFN synchronization zone sign and MBMS service area information are sent to base station DeNB; Receive professional sub-frame information, MBSFN area information, the MCCH schedule information of MBMS of the RN sub-district that DeNB sends, obtain the MBMS configuration information of RN sub-district, and broadcast at the Uu mouth according to SIB2 and the SIB13 of the MBMS configuration information structure RN of RN sub-district.
26. RN as claimed in claim 19; It is characterized in that; Said OFDM symbol forwarding module; Specifically be used for MCCH schedule information, receive the OFDM symbol that MCCH is mapped to physical layer, and this OFDM symbol is handled the back through physical layer signal transmit synchronously constantly at same OFDM symbol according to the MBMS configuration information; Be mapped to physical layer OFDM symbol according to this MCCH and carry out demodulation acquisition MCCH information; And
According to MCCH information acquisition MTCH schedule information, receive the OFDM symbol that MTCH is mapped to physical layer according to the MTCH schedule information, and this OFDM symbol is handled the back through physical layer signal transmit synchronously constantly at same OFDM symbol; Be mapped to physical layer OFDM symbol according to this MTCH and carry out demodulation acquisition MTCH information.
27. a base station DeNB is characterized in that, comprising:
The configuration information sending module is used to send multimedia broadcast multicast service Single Frequency Network MBSFN area configurations information, makes that RN can be according to MBSFN area configurations information acquisition multimedia broadcast-multicast service MBMS configuration information;
Orthogonal frequency division multiplex OFDM symbol sending module is used for the multicast control channel MCCH information mapping that MBMS is corresponding to the OFDM symbol of physical layer and in the transmission of eating dishes without rice or wine; And the multicast service channel MTCH information mapping that MBMS is corresponding is to the OFDM symbol of physical layer and in the transmission of eating dishes without rice or wine.
28. DeNB as claimed in claim 27; It is characterized in that; Said MBMS configuration information specifically comprises: MBSFN area configurations information and MBMS service area information, said MBSFN area configurations information specifically comprises: the MBSFN sub-frame information that MBMS takies, MBSFN area information, MCCH schedule information.
29. DeNB as claimed in claim 27; It is characterized in that; When identical MBMS configuration information is used with host Donor sub-district in the RN sub-district; Then said configuration information sending module specifically is used for sending the MBMS configuration information of Donor sub-district through the radio resource control RRC dedicated signaling to RN, wherein comprises the MBSFN area configurations information and the MBMS service area information of Donor sub-district in the MBMS configuration information of Donor sub-district.
30. DeNB as claimed in claim 27; It is characterized in that; When different MBMS configuration informations is used with the Donor sub-district in the RN sub-district; Then said configuration information sending module specifically is used for the MBSFN sub-frame information, MBSFN area information, the MCCH schedule information that take to the MBMS of RN transmission RN sub-district.
31. DeNB as claimed in claim 30; It is characterized in that; When different MBMS service area information is used with the Donor sub-district in the RN sub-district; Said configuration information sending module also is used to receive the RN sub-district of many sub-districts coordination entity MCE transmission and the MBMS session of Donor sub-district, and the MBMS session of RN sub-district is transmitted to RN; Receiving MCE is the MBMS schedule information of the MBMS session distribution of RN sub-district and Donor sub-district, and the MBMS schedule information that the MBMS session of RN sub-district is corresponding sends to RN.
32. the transmitting system of a MBMS is characterized in that, comprising:
Base station DeNB; Be used to send multimedia broadcast multicast service Single Frequency Network MBSFN area configurations information; Make that via node RN can be according to MBSFN area configurations information acquisition multimedia broadcast-multicast service MBMS configuration information, and the multicast control channel MCCH information mapping that MBMS is corresponding is to the orthogonal frequency division multiplex OFDM symbol of physical layer and in the transmission of eating dishes without rice or wine; The multicast service channel MTCH information mapping that MBMS is corresponding is to the OFDM symbol of physical layer and in the transmission of eating dishes without rice or wine;
Said RN is used to obtain the MBMS configuration information, and broadcasts; According to the MBMS configuration information, receive MCCH and be mapped to the OFDM symbol of physical layer and forwarding synchronously, and be mapped to the OFDM symbol acquisition MCCH information of physical layer according to this MCCH; According to MCCH information acquisition MTCH schedule information, receive MTCH according to the MTCH schedule information and be mapped to the OFDM symbol of physical layer and forwarding synchronously, and be mapped to the OFDM symbol acquisition MTCH information of physical layer according to this MTCH.
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