CN101877823B

CN101877823B - Method and device for scheduling multicast broadcast service

Info

Publication number: CN101877823B
Application number: CN200910082725A
Authority: CN
Inventors: 杨晓东; 赵毅; 梁靖; 张大钧
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2009-04-28
Filing date: 2009-04-28
Publication date: 2012-09-26
Anticipated expiration: 2029-04-28
Also published as: CN101877823A

Abstract

The invention discloses a method and a device for scheduling a multicast broadcast service. The method comprises the following steps: sending downlink control information by utilizing a multicast control channel (MCCH), the control information comprises scheduling subunit identification information and at least one MSAP region associated with each scheduling subunit; and carrying out unified scheduling on the at least one MSAP region associated with each scheduling subunit through a corresponding scheduling subunit. By using the technical scheme, a plurality of MSAP regions can be scheduled in centralization, thus making full use of network resources.

Description

A kind of dispatching method of Multimedia Broadcast Multicast Service and device

Technical field

The present invention relates to communication technical field, be meant a kind of dispatching method and device of Multimedia Broadcast Multicast Service especially.

Background technology

Long evolving system (Long Term Evolution; LTE) (the Multimedia Broadcast Multicast Service of the Multimedia Broadcast Multicast Service in; MBMS) evolution Multimedia Broadcast Multicast Service (the evolved MBMS that is otherwise known as; EMBMS), major function is in the LTE system, to realize broadcasting and multicast service.

Because what Multicast Broadcast Single Frequency Network (MBSFN) transmission means related to is the synchronous transmission of a plurality of minizones, therefore need the zone of MBSFN transmission is defined:

The MBSFN retaining zone: be meant the zone of having the ability to carry out the MBSFN transmission, all eNodeB in this zone can be synchronized and carry out MBSFN and transmit.

MBSFN zone: be meant through coordinating to have realized one group of sub-district of MBSFN transmission, comprise in the network one group of sub-district in the MBSFN retaining zone.

As shown in Figure 1, the MBMS service area comprises: a plurality of MBSFN zone.

Each MBSFN zone comprises: sub-district (MBSFN Area Transmitting-Only Cell) is sent in transmission/announcement sub-district (MBSFN Area Transmitting and Advertising Cell), MBSFN zone, MBSFN zone and the MBSFN zone keeps some types sub-districts such as (MBSFN Area Reserved Cell), sub-district.

Wherein, transmission/announcement sub-district, MBSFN territory is one type of sub-district in the MBSFN zone, participates in MBSFN and sends, and also participates in the announcement of MBSFN transmission availability in the sub-district.It is one type of sub-district in the MBSFN zone that the sub-district is sent in MBSFN zone, is meant that only participating in MBSFN sends and do not participate in the announcement that the MBSFN sub-district in transmits availability.It is a sub-district in the MBSFN zone that the MBSFN zone keeps the sub-district, and it is not participated in MBSFN and sends.

MBSFN transmits (MBSFN Transmission): a kind of radio hookup transmission technology, realize through transmit consistent signal waveform simultaneously in a plurality of sub-districts.The MBMS transmission can be divided into many cell transmission and single cell transmission, and many cell transmission adopt the MBSFN transmission, and single cell transmission adopts PTM (point-to-multipoint) transmission.The sub-district that is used for the MBMS transmission is divided into MBMS dedicated cell and MBMS/Unicast mixed cell, in the MBMS dedicated cell, and a MBMS transmission business; And in the MBMS/Unicast mixed cell; Existing MBMS is professional, also has Unicast professional, and the two transmits with cooperative mode.

2) eMBMS interrelated logic channel comprises: BCCH (Broadcast Control Channel; BCCH); Multicast control channel (Multicast Control Channel, MCCH) and the multicast service channel (Multicast Traffic Channel, MTCH) etc.BCCH is used for network to the UE broadcast system information; MCCH is the down channel of a point to multiple spot (point-to-multipoint), is used for network to the relevant control information of UE MBMS transmission, and a MCCH can be corresponding to one or more MTCH; This channel has only the UE that can receive the MBMS business just can use.MTCH is the down channel of a point to multiple spot, is used for network to the UE transferring MBMS service data; This channel has only the UE that can receive the MBMS business just can use.The information of MTCH is to be indicated by its corresponding MCCH.Network utilisation BCCH indicates MCCH to UE, utilizes MCCH to indicate MTCH to UE again, makes UE be received in the purpose that MTCH goes up the MBMS business of carrying thereby reach.

MBSFN is divided into two ranks: radio frames (Radio Frame) and subframe (Sub Frame).Radio frames distributes the mode of employing Period and offset to represent, the MBSFN radio frames will appear in the position of satisfying following formula at SFN:

SFN?mod?radioFrameAllocationPeriod＝radioFrameAllocati?onOffset (1)

Sub-frame allocation is followed is bit mapping (bitmap) mode, and during single radio frames bitmap, a frame is mapped as 6 bits.Four continuous radio frames bits are mapped as 24 bits.

For FDD, in each radio frames can all MBSFN subframes be: #1, #2, #3, #6, #7, #8, corresponding to 6 bits of bitmap.For TDD, MBSFN subframe available in each radio frames is: #3, #4, #7, #8, #9, corresponding to preceding 5 bits of bitmap, last 1 bit of bitmap does not use.It should be noted that for TDD sub-frame of uplink can not be assigned to the MBSFN subframe.When subframe was assigned as four continuous radio frames bitmap, the SFN that distributes formula to calculate according to radio frames in (1) was the original position of these four radio frames.

A MBSFN distributes can be called a Multicast Channel (MCH) sub-frame allocation pattern (MSAP) zone (occasion).Before at present the MSAP zone being dispatched, be that each MSAP zone is dispatched respectively, system need issue control information to each MSAP.

At present 3GPP has determined to introduce LTE to E-MBMS at R9, and MBMS is a kind of broadcasting service, and UE is in connection status and still is in idle condition and can receives the MBMS business.Because MBMS can carry text; Business such as Streaming Media; Packet size that there are some researches show streaming media service is not constant; For realizing E-MBMS in the LTE system, issue control information to each MSAP, the mode that each MSAP zone is dispatched separately can not make full use of Internet resources.

Summary of the invention

The present invention provides a kind of dispatching method of multicast and broadcast, can be implemented in the process of scheduling, more makes full use of Internet resources.

The dispatching method of a kind of Multimedia Broadcast Multicast Service that the embodiment of the invention provides comprises:

Utilize multicast control channel MCCH to send Downlink Control Information, said control information comprises: scheduling sublayer unit marks information and each scheduling sublayer unit related at least one MSAP zone;

Through each scheduling sublayer unit uniform dispatching is carried out at least one MSAP zone of association, wherein, with all subframe numberings in said at least one MSAP zone of correspondence, for each business is distributed subframe according to numbering; Each business of subframe scheduling in correspondence.

The dispatching device of a kind of Multimedia Broadcast Multicast Service that the embodiment of the invention provides comprises:

The control information transmitting element is used to utilize multicast control channel MCCH to send Downlink Control Information, and said control information comprises: scheduling sublayer unit marks information and each scheduling sublayer unit related at least one MSAP zone;

Scheduling unit is used for uniform dispatching is carried out at least one related MSAP zone of each scheduling sublayer unit; Wherein, said scheduling unit comprises:

Resource allocation unit is used for all the subframe orderings of said at least one MSAP zone with correspondence, for each business is distributed subframe according to ordering; And

First scheduling unit is used for each business of subframe scheduling in correspondence.

The embodiment of the invention utilizes multicast control channel MCCH to send Downlink Control Information, and said control information comprises: scheduling sublayer unit marks information and each scheduling sublayer unit related at least one MSAP zone; Scheduling sublayer unit through correspondence carries out uniform dispatching at least one related MSAP zone of each scheduling sublayer unit.Use technical scheme of the present invention, can dispatch, can utilize Internet resources more fully a plurality of MSAP regional centralized.

Description of drawings

Fig. 1 is a MBMS basic conception configuration diagram;

Fig. 2 realizes the method flow sketch map of scheduling for the embodiment of the invention;

Fig. 3 is the sketch map that there are two MSAP in a sub-district;

Fig. 4 is the dispatch form sketch map of the embodiment of the invention;

Fig. 5 is the apparatus structure sketch map of the embodiment of the invention.

Embodiment

In the embodiment of the invention, utilize MCCH to send Downlink Control Information, said control information comprises: scheduling sublayer unit marks information and each scheduling sublayer unit related at least one MSAP zone; Uniform dispatching is carried out at least one MSAP zone to each scheduling sublayer unit is related.

Referring to shown in Figure 2, the detailed process of the scheduling of embodiment of the invention realization Multimedia Broadcast Multicast Service is following:

Step 201: utilize MCCH to send Downlink Control Information, said control information comprises: scheduling sublayer unit marks information and each scheduling sublayer unit related at least one MSAP zone.

Here, the scheduling sublayer unit can be multiplexing subchannel (MSCH), also can be medium access control (MAC) control element (CE), is called for short medium access control element.

Step 202: uniform dispatching is carried out at least one the MSAP zone to each scheduling sublayer unit is related.

Here, step 202 can realize like this: with all subframe numberings in said at least one MSAP zone of correspondence, for each business is distributed subframe according to numbering; Each business of subframe scheduling in correspondence.

For each traffic assignments subframe mode can comprise a variety ofly, below illustrate.

For example: can be according to each the MSAP zone number that is provided with in advance in proper order with said at least one MSAP region ordering; And with the subframe in each MSAP zone according to time-sequencing; Therefore; Can be to the subframe of all MSAP region orderings numbering, for the resource of each traffic assignments is the subframe according to number sorting.

Also can be according to time sequencing to the numbering that sorts of the subframe in related at least one MSAP zone, each scheduling sublayer unit; For the resource of each traffic assignments in said at least one MSAP zone is the subframe according to time-sequencing.

Certainly; Can a MSAP zone number be set for each MSAP zone; After utilizing multicast control channel MCCH transmission Downlink Control Information, issue dispatch; Wherein contain the numbering in the MSAP zone of scheduling sublayer unit marks, each scheduling sublayer unit association, service identification, time started and the concluding time that each is professional, with the notice schedule information of a period of time in all corresponding MSAP zones of a scheduling sublayer unit.

Can be that multiplexing subchannel MSCH or two kinds of situation of MAC CE are explained concrete scheme of the present invention with the scheduling sublayer unit respectively below.

When system configuration has a plurality of MSAP, for each MSAP configuration numbering, such as MSAP1, MSAP2.。。。。。MSAPN。Come the running time-frequency resource position of pointer through MCCH then, use corresponding MSCH (or MAC CE) to indicate each professional schedule information among its corresponding MSAP occasion then the MSCH (or MAC CE) in different MS AP zone (occasion).This corresponding relation can be the corresponding MSAP occasion of a MSCH (or MAC CE), equally also can be the corresponding several MSAP occasion of a MSCH (or MAC CE).

Referring to shown in Figure 3, if two the MSAP occasion that have been certain cell allocation, i.e. MSAP1 and MSAP2, the radio frames of MSAP1 comprises: N+3, N+7, N+11; N+15, N+19......, the radio frames of MSAP2 comprises: N+1, N+5, N+9; N+13, N+17......, wherein, each radio frames also comprises 10 sub-frame, such as: according to system configuration; Radio frames N+3, N+7, N+11, N+15 is used for transmitting the subframe of MBSFN in two sub-frame of the shadow positions shown in Fig. 4 b among the N+19.......

One, the embodiment 1 that adopts MSCH to dispatch is following:

A MSCH is arranged in the MCCH indication mechanism, and this MSCH is related MSAP1 and MSAP2 simultaneously, the resource location of while MCCH instruct MS CH, and this MSCH can be placed among the MSAP1 and transmit, and also can be placed among the MSAP2 and transmit.System can utilize this MSCH to MSAP1 and MSAP2 uniform dispatching then, and the signaling of concrete scheduling can provide each professional time started and the concluding time gets final product.Such as subframe among the following MSAP1 of the situation of uniform dispatching and the unified in chronological order numbering of the subframe among the MSAP2, from 1 to 50.Professional one time started is a subframe 1 then, and the concluding time is a subframe 25, and professional two time started is that 25 concluding times of subframe are subframe 40, and professional three time started is that 40 concluding times of subframe are subframe 50.

Two, the embodiment 2 that adopts MSCH to dispatch is:

Two MSCH, MSCH1 and MSCH2 are arranged in the MCCH indication mechanism.These two MSCH are associated with MSAP1 and MSAP2 respectively, the resource location of two MSCH of MCCH indication simultaneously, and wherein MSCH1 can be placed among the MSAP1 and transmit, and MSCH2 is placed among the MSAP2 and transmits.System can utilize these two MSCH respectively to MSAP1 and MSAP2 scheduling then, and the signaling of concrete scheduling can provide each professional time started and the concluding time gets final product.

Such as: with the unified in chronological order numbering of the subframe among the MSAP1, from 1 to 26.Professional one time started is a subframe 1 then, and the concluding time is a subframe 8, and professional two time started is that 8 concluding times of subframe are subframe 20, and professional three time started is that 20 concluding times of subframe are subframe 26.

With the unified in chronological order numbering of the subframe among the MSAP2, from 1 to 24.Professional one time started is a subframe 1 then, and the concluding time is a subframe 6, and professional two time started is that 6 concluding times of subframe are subframe 18, and professional three time started is that 18 concluding times of subframe are subframe 24.

Three, the embodiment 1 that adopts MAC CE to dispatch is:

A scheduling MAC CE is arranged in the MCCH indication mechanism, and this scheduling MAC CE is related MSAP1 and MSAP2 simultaneously.If shown in Figure 4, wherein the R territory is for keeping the territory, and LCID is MAC CE sign.Represent that this MAC CE and which MSAP are associated for MSAP number, whether the next byte of F domain representation is MSAP number still professional scheduling, such as being 1 for MSAP identifies, is 0 can be service dispatching.Service dispatching can comprise service identification, professional time started and service ending time, and it also can be a plurality of that the byte number that these three parameters take can be one, as long as regular length.

The situation of concrete scheduling can be with subframe among the MSAP1 and the unified in chronological order numbering of the subframe among the MSAP2, from 1 to 50.Professional one time started is a subframe 1 then, and the concluding time is a subframe 25, and professional two time started is that 25 concluding times of subframe are subframe 40, and professional three time started is that 40 concluding times of subframe are subframe 50.

Four, the embodiment 2 that adopts MAC CE to dispatch is:

Similar employing MSCH embodiment 2, the related MSAP of each scheduling MAC CE, the MAC CE of scheduling MSAP1 need be put among the MSAP1 and transmit, and the MAC CE of scheduling MSAP2 need be put among the MSAP2 and transmit.

Certainly, in above-mentioned four embodiment, the subframe of MSAP1 and MSAP2 put in order can also be MSAP1 subframe formerly, the subframe of MSAP2 after, also can all upset numbering according to certain strategy.

Referring to shown in Figure 5, a kind of multicast and broadcast service scheduling device that the embodiment of the invention provides comprises:

Control information transmitting element 51 is used to utilize multicast control channel MCCH to send Downlink Control Information, and said control information comprises: scheduling sublayer unit marks information and each scheduling sublayer unit related at least one MSAP zone;

Scheduling unit 52 is used for uniform dispatching is carried out at least one related MSAP zone of each scheduling sublayer unit.

Said scheduling unit comprises:

Resource allocation unit is used for all the subframe numberings of said at least one MSAP zone with correspondence, for each business is distributed subframe according to numbering;

Said resource allocation unit is used for according to each the MSAP zone number that is provided with in advance in proper order with said at least one MSAP region ordering, and with the subframe in each MSAP zone according to time-sequencing, and the subframe of all MSAP region orderings numbered.

Said resource allocation unit is used for sorting according to the subframe of time sequencing at least one related MSAP zone of each scheduling sublayer unit; Be each traffic assignments in said at least one MSAP zone subframe according to time-sequencing.

Can further include:

Dispatch issues the unit; Be used for after utilizing multicast control channel MCCH transmission Downlink Control Information; At least one related MSAP zone of each scheduling sublayer unit is carried out before the uniform dispatching; Issue dispatch, wherein contain the numbering in the MSAP zone of scheduling sublayer unit marks, each scheduling sublayer unit association, service identification, time started and the concluding time that each is professional.

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

1. the dispatching method of a Multimedia Broadcast Multicast Service is characterized in that, this method comprises:

Utilize multicast control channel MCCH to send Downlink Control Information, said control information comprises: scheduling sublayer unit marks information and each scheduling sublayer unit related at least one Multicast Channel MCH sub-frame allocation pattern MSAP zone;

2. method according to claim 1 is characterized in that, said all subframes numbering in said at least one MSAP zone of correspondence is distributed subframe for each business according to numbering, comprising:

According to each the MSAP zone number that is provided with in advance in proper order with said at least one MSAP region ordering, and with the subframe in each MSAP zone according to time-sequencing, and the subframe of all MSAP region orderings numbered;

For each business is distributed subframe according to number order.

3. method according to claim 1 is characterized in that, said all subframes numbering in said at least one MSAP zone of correspondence is distributed subframe for each business according to numbering, comprising:

According to time sequencing the subframe at least one MSAP zone of each scheduling sublayer unit association is sorted;

For each business in said at least one MSAP zone is distributed subframe according to time-sequencing.

4. method according to claim 1; It is characterized in that; For each MSAP zone is provided with a MSAP zone number; Then utilizing after multicast control channel MCCH sends Downlink Control Information, at least one related MSAP zone of each scheduling sublayer unit is carried out before the uniform dispatching, this method further comprises:

Issue dispatch, wherein contain the numbering in the MSAP zone of scheduling sublayer unit marks, each scheduling sublayer unit association, service identification, time started and the concluding time that each is professional.

5. method according to claim 1 is characterized in that, said scheduling sublayer unit is multiplexing subchannel MSCH, or, medium access control element.

6. the dispatching device of a Multimedia Broadcast Multicast Service is characterized in that, this device comprises:

The control information transmitting element; Be used to utilize multicast control channel MCCH to send Downlink Control Information, said control information comprises: scheduling sublayer unit marks information and each scheduling sublayer unit related at least one Multicast Channel MCH sub-frame allocation pattern MSAP zone;

Resource allocation unit is used for all the subframe numberings of said at least one MSAP zone with correspondence, for each business is distributed subframe according to numbering; And

7. device according to claim 6; It is characterized in that; Said resource allocation unit is used for according to each the MSAP zone number that is provided with in advance in proper order with said at least one MSAP region ordering, and with the subframe in each MSAP zone according to time-sequencing; And to the subframe of all MSAP region orderings numbering, for each business is distributed subframe according to number order.

8. device according to claim 6 is characterized in that, said resource allocation unit is used for sorting according to the subframe of time sequencing at least one related MSAP zone of each scheduling sublayer unit; For each business in said at least one MSAP zone is distributed subframe according to time-sequencing.

9. device according to claim 6 is characterized in that, further comprises: