CN101772146B - Method for synchronizing multimedia broadcast/multicast service among radio network controllers - Google Patents
Method for synchronizing multimedia broadcast/multicast service among radio network controllers Download PDFInfo
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- CN101772146B CN101772146B CN2008102473714A CN200810247371A CN101772146B CN 101772146 B CN101772146 B CN 101772146B CN 2008102473714 A CN2008102473714 A CN 2008102473714A CN 200810247371 A CN200810247371 A CN 200810247371A CN 101772146 B CN101772146 B CN 101772146B
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Abstract
The embodiment of the invention discloses a method for synchronizing a multimedia broadcast/multicast service (MBMS) among radio network controllers (RNC). Each RNC that a service area covered by the current MBMS service belongs to realizes MBMS service synchronization according to MBMS service synchronization parameters. The method comprises that: a serving radio network controller (SRNC) computes the MBMS service synchronization parameters when the service area covered by the current MBMS service is not intersect with the service area covered by the SRNC; and the SRNC sends the computed MBMS service synchronization parameters to each RNC that the service area covered by the current MBMS service belongs to. By application of the method, when the MBMS service is performed in the service area outside the service area of SRNC, each RNC can still realize synchronization the MBMS service.
Description
Technical field
The present invention relates to the mobile communication technology field; Relate in particular to a kind of at each radio network controller (Radio Network Controller; RNC) synchronized multimedia broadcast group broadcast between (MultimediaBroadcast Multicast Service, MBMS) method of business.
Background technology
When realizing that in GSM MBMS is professional, require can realize synchronously between each RNC in the GSM that MBMS is professional, that is, each RNC is in same Connection Frame Number (Connection Frame number, CFN) moment broadcasting MBMS business datum.
At present, the RNC in the GSM be divided into Serving RNC (Service RNC, SRNC) and Drift Radio Network Controller (Drift RNC, DRNC) two types.The part of SRNC comprises shares packet data protocol convergence protocol (Packet Data Convergence Protocol; PDCP) entity and shared Radio Link control (Radio Link Control; RLC) entity, each sub-district that DRNC administered directly is controlled by SRNC, therefore; Send MBMS service synchronization parameter by SRNC to each DRNC, each RNC (comprising SRNC and DRNC) realizes the synchronous of MBMS business according to said MBMS service synchronization parameter.Below in conjunction with in 1 pair of prior art of accompanying drawing between each RNC synchronously the professional method of MBMS explain.
Fig. 1 be in the prior art between each RNC the synchronous professional system schematic of MBMS.
System shown in Figure 1 comprises the sub-district 1 of core net (CN), SRNC, DRNC, NodeB1 administration, the sub-district 2 of NodeB2 administration and the sub-district 3 of NodeB3 administration.
Wherein, DRNC comprises MBMS chain of command entity, MBMS PDCP entity, MBMS RLC entity, Iur FP interface, MAC_m entity and Frame Protocol (Frame Protocol, FP) entity; SRNC comprises MBMS chain of command entity, shares MBMS PDCP, shares MBMS RLC, Iur FP interface, MAC_m entity and FP entity; NodeB1～NodeB3 includes FP entity and PHY entity.DRNC and SRNC are through MBMS chain of command entity interaction MBMS traffic signaling message, through IurFP interactive interfacing MBMS business datum; DRNC and SRNC all send to corresponding N odeB through MAC_m and FP entity with the MBMS business datum.
When system shown in Figure 1 realizes that MBMS is professional; The professional coverage that is covered of MBMS can cover the coverage that a plurality of RNC covers, and for this situation, requires each RNC to realize that synchronously MBMS is professional; Promptly; Require each RNC (comprising SRNC and DRNC) to adopt identical physical channel, transmission channel, Radio Resource (RB) configuration, and send the MBMS business datum, thereby it is professional to realize realizing same MBMS synchronously at synchronization.
Each RNC realizes that the scheme of MBMS service synchronization is at present: judge by SRNC the MBMS session foundation of CN transmission asks SA tabulation of carrying in (MBMS Session Start) message and the SA that this SRNC self stores to tabulate whether there is common factor; If; Explain that there is the common factor coverage in the coverage that the professional coverage that covers of current MBMS and this SRNC self are covered, then SRNC need be to said common factor coverage described each Cell Broadcast CB MBMS business datum; If not, explain that there is not the common factor coverage in the coverage that the professional coverage that covers of current MBMS and this SRNC self are covered, then SRNC does not need the broadcasting MBMS business datum.
At present; When only there is the common factor coverage in SRNC in the coverage that coverage and this SRNC of the professional covering of current MBMS self are covered; On the one hand through creating the MAC_m entity, calculating MBMS service synchronization parameter by the MAC_m entity; This MBMS service synchronization parameter is issued each DRNC, through creating the FP entity, utilize each Cell Broadcast CB MBMS business datum of FP entity under the common factor coverage on the other hand according to said MBMS service synchronization parameter.When there is not the common factor coverage in the coverage that the coverage and the SRNC of the professional covering of current MBMS self are covered; This SRNC need not the broadcasting MBMS business datum; Therefore; This SRNC can not create the FP entity, and this SRNC can not create the said MAC_m entity that is used to calculate MBMS service synchronization parameter yet.
Particularly, Fig. 2 is system shown in Figure 1 professional method flow diagram of synchronous MBMS between each RNC, and as shown in Figure 2, this method comprises:
Step 201:CN sends MBMS Session Start message to DRNC and SRNC, in MBMS Session Start message, carries coverage (SA) tabulation.
Step 202:SRNC judges whether SA tabulation of carrying in the MBMS SESSION START message from CN and the SA tabulation that this SRNC self stores exist common factor; If; Execution in step 203, otherwise this SRNC is not to the Cell Broadcast CB MBMS business datum of himself administering; And do not calculate MBMS service synchronization parameter, process ends.
In this step; If the SA that carries in MBMS SESSION START message tabulation is occured simultaneously with the SA tabulation existence of this SRNC self storage; Explain that then there is intersection the coverage that professional coverage that is covered of current MBMS and SRNC are covered, promptly have the common factor coverage, otherwise; Explain that above-mentioned two coverages do not have intersection, promptly do not exist the common factor coverage.
MBMS service synchronization parameter in this step comprises CFN information and transformat (TransportFormat, TF) information.
In this step; Usually; SRNC and each DRNC send MBMS business datum and corresponding C FN information in the moment of CFN information indication to the NodeB of administration separately; Each NodeB goes out corresponding System Frame Number according to the CFN information calculations that receives, and (System Frame number, SFN) information issue the MBMS business datum at the terminal (UE) of the moment in each sub-district of this NodeB administration of corresponding SFN information indication.
Visible by technique scheme; When the MBMS business is not when between all RNC, carrying out, the coverage of MBMS business beyond the coverage that SRNC covered then might occur and carry out, at this moment; There is not common factor in the coverage that professional coverage that covers of MBMS and SRNC are covered; According to method illustrated in figures 1 and 2, in this case, SRNC does not calculate MBMS service synchronization parameter.Because each DRNC needs to realize the synchronous of MBMS business according to the MBMS service synchronization parameter from SRNC; Therefore; When the MBMS business is carried out in the coverage in addition, coverage of SRNC, because each DRNC owing to can't obtain MBMS service synchronization parameter and can't realize the synchronous of MBMS business from SRNC.
Summary of the invention
In view of this; The purpose of the embodiment of the invention be to provide a kind of between each radio network controller the method for synchronizing multimedia broadcast/multicast service; So that the coverage of MBMS business beyond the coverage of SRNC be when carrying out, each RNC still can realize MBMS professional synchronously.
For achieving the above object, the technical scheme of the embodiment of the invention specifically is achieved in that
A kind of between each radio network controller (RNC) the professional method of synchronized multimedia broadcast group broadcast MBMS, each RNC under the professional coverage that is covered of current MBMS realizes the MBMS service synchronization according to MBMS service synchronization parameter, this method also comprises:
When there is not common factor in the coverage that SRNC self is covered with this SRNC in the professional coverage that is covered of current MBMS; Calculate MBMS service synchronization parameter, the MBMS service synchronization parameter that calculates is issued each RNC under the professional coverage that is covered of current MBMS.
Visible by technique scheme; Because when there is not common factor in the coverage that SRNC self is covered with this RNC in the professional coverage that is covered of current MBMS; Still calculate MBMS service synchronization parameter, and the MBMS service synchronization parameter that calculates is issued each RNC under the professional coverage that is covered of current MBMS, therefore; When carry out the coverage beyond the coverage of MBMS business at SRNC; Each RNC except that SRNC still can obtain MBMS service synchronization parameter, and therefore, each RNC still can realize the synchronous of MBMS business.
Description of drawings
Fig. 1 be in the prior art between each RNC the synchronous professional system schematic of MBMS;
Fig. 2 is system shown in Figure 1 professional method flow diagram of synchronous MBMS between each RNC;
Fig. 3 is the general flow chart of the professional method of the present invention synchronous MBMS between each RNC;
Fig. 4 is the present invention's first professional method flow diagram of synchronous MBMS between each RNC;
Fig. 5 is the present invention's second professional method flow diagram of synchronous MBMS between each RNC.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, to further explain of the present invention.
Core concept of the present invention is: when there is not common factor in the coverage that SRNC self is covered with this RNC in the professional coverage that is covered of current MBMS; Calculate MBMS service synchronization parameter, the MBMS service synchronization parameter that calculates is issued each RNC under the professional coverage that is covered of current MBMS.
Because in the prior art; When there is not common factor in the coverage that SRNC self is covered with this RNC in the professional coverage that is covered of current MBMS; Do not calculate MBMS service synchronization parameter; Caused each DRNC can't obtain MBMS service synchronization parameter, therefore, when there is not common factor in the present invention through the coverage that self is covered with this RNC in the professional coverage that is covered of current MBMS; SRNC still calculates MBMS service synchronization parameter, thereby solved the technical problem that each DRNC can't obtain MBMS service synchronization parameter.
Fig. 3 is the general flow chart of the professional method of the present invention synchronous MBMS between each RNC, and as shown in Figure 3, this method comprises:
Carry MBMS service region information unit (MBMS Service Area IE, i.e. SA tabulation) in the MBMS SESSION START message in this step.
In this step; SRNC can the SA that carry in the MBMS SESSION START message tabulates and the SA tabulation of this SRNC self storage through comparing; When there is common factor in above-mentioned two SA tabulation; Judge to exist between the coverage that coverage that current MBMS covers and this SRNC administered and occur simultaneously, do not exist when occuring simultaneously, judge between the coverage that coverage that current MBMS covers and this SRNC administered and do not have common factor in above-mentioned two SA tabulation.
In the method shown in Figure 3, the coverage that self is covered with this RNC in the professional coverage that is covered of current MBMS does not exist when occuring simultaneously, and according to the SRNC calculating MBMS service synchronization parameter difference on opportunity, provides two embodiment and respectively the present invention is explained.In first embodiment, SRNC calculates MBMS service synchronization parameter immediately after judging coverage that the professional coverage that is covered of current MBMS and this RNC self covered and not having common factor.In a second embodiment, SRNC just calculates MBMS service synchronization parameter after receiving the request of obtaining MBMS service synchronization parameter.
Below among each embodiment: RNC creates the MBMS_IU entity and is meant; Be used to realize tunnel protocol user plane (GPRS Tunneling Protocol-User Plane inner establishment of this RNC; GTPU) entity of protocol processes process, PDCP protocol processes process and rlc protocol processing procedure, the MBMS_IU entity of establishment is used to set up MBMS service surface information; RNC creates the MBMS_IUB entity and is meant, creates the entity that is used for setting up at all broadcast cells of this RNC administration the processing procedure of the Common transport channel (MTCH channel) that is used for transferring MBMS service data; The MBMS_IUR entity that RNC creates carries out local resource allocation and is meant, in this RNC internal distribution IUR_FP protocol entity corresponding transport layer address (Transport Layer Address), binding logo resources such as (Binding ID); The MBMS_IUR that SRNC creates carries out allocation of radio resources and is meant, in resource informations such as the professional corresponding frequency of this SRNC internal distribution MBMS, time slot, sign indicating numbers.
First embodiment:
Fig. 4 is the present invention's first professional method flow diagram of synchronous MBMS between each RNC, and as shown in Figure 4, this method comprises:
Step 401, SRNC receives the MBMS SESSION START message from CN, and goes out between the coverage that coverage that current MBMS covers and this SRNC administered not have common factor according to MBMS SESSION START message determining.
Do not comprise the SA of this SRNC configuration in the SA tabulation of carrying in the MBMS SESSION START message in this step, do not have common factor between the coverage that the coverage that promptly current MBMS covered and this SRNC are administered.
Step 402, SRNC carries out MBMS_IU and sets up process.
In this step, RNC creates the MBMS_IU entity, sets up MBMS service surface information.
Step 403, SRNC sets up the MAC entity according to the MBMS business information of carrying in the MBMS SESSION START message.
MAC entity in this step is the MAC_m entity that is used to calculate MBMS service synchronization parameter, and said MBMS service synchronization parameter comprises CFN information and TF information.
Step 404, SRNC returns MBMS SESSION START RESPONSE message to CN.
In the method shown in Figure 4; Because when not having common factor between the coverage of being administered with this SRNC in coverage that current MBMS covered; Still calculated MBMS service synchronization parameter in the step 403; Therefore, SRNC can provide MBMS service synchronization parameter for each RNC, thereby makes each RNC can realize the MBMS service synchronization.
Second embodiment:
Fig. 5 is the present invention's second professional method flow diagram of synchronous MBMS between each RNC, and as shown in Figure 5, this method comprises:
Step 501, CN sends MBMS SESSION START message to SRNC and DRNC.
In this step, CN sends the sequencing indefinite of MBMS SESSION START message to SRNC and DRNC.SRNC and DRNC receive the MBMS SESSIONSTART message from CN respectively.
Step 502, SRNC carries out MBMS_IU and sets up process.
This step is with step 402.
Step 503, SRNC returns the MBMS session to CN and begins response (MBMS SESSIONSTART RESPONSE) message.
Step 504, DRNC carries out MBMS_IU and sets up process.
In this step, DRNC creates the MBMS_IU entity, sets up MBMS service surface information.
Step 505, DRNC creates the MBMS_IUR entity and carries out local resource allocation.
Step 506, DRNC sends the MBMS synchronous bearer to SRNC and sets up request (MBMS SYNCBEARER SETUP REQ) message.
In this step, carry in the MBMS SYNC BEARER SETUP REQ message Temporary Mobile Group Identity (Temporary Mobile Group Identity, TMGI), the information such as IUR service surface address of DRNC.
Step 507, SRNC receives MBMS SYNC BEARER SETUP REQ message, sets up the MAC entity according to the MBMS business information of carrying in the MBMS SYNC BEARER SETUP REQ message.
MAC entity in this step is used for confirming MBMS service synchronization parameters such as CFN information, TF information, uses when these MBMS service synchronization parameters are used to supply the preceding MBMS of commentaries on classics of SRNC data.
Carry the local resource information of MBMS service surface information and said RNC in the MBMS SYNC BEARER SETUP REQ message.
Step 504 and step 502～with 503 are owing to carry out on different entities, and therefore, step 504 is unrestricted with the sequencing of step 502～503.But step 507 needs after step 506, to carry out.
Step 508, SRNC carries out local resource allocation and allocation of radio resources.
In this step, SRNC creates the MBMS_IUR entity, and the MBMS_IUR entity carries out local resource allocation and distributes and Radio Resource.
Step 509, SRNC sends the MBMS synchronous bearer to DRNC and sets up response (MBMS SYNCBEARER SETUP RSP) message.
In this step, carry IUR service surface address and the resource information of SRNC in the MBMS SYNC BEARER SETUP RSP message.
Step 510 after DRNC receives MBMS SYNC BEARER SETUP RSP message, is carried out MBMS_IUB and is set up process.
In this step, RNC creates the MBMS_IUB entity, sets up the MTCH channel that is used for transferring MBMS service data at all broadcast cells of this RNC administration.
Step 511, DRNC sends MBMS SESSION START RESPONSE message to CN, representes that this DRNC is to current MBMS service response success.
It is thus clear that; Because prior art illustrated in figures 1 and 2 requires must be under the situation of SRNC broadcasting MBMS business datum; Just set up the MAC entity and calculate MBMS service synchronization parameter, this does not solve the problem how SRNC each DRNC when broadcasting MBMS business datum not obtains MBMS service synchronization parameter and then realize the MBMS service synchronization, when there is not common factor in the coverage that the present invention self is covered with this RNC in the professional coverage that is covered of current MBMS; Still calculate MBMS service synchronization parameter; Thereby under situation about broadcasting between part RNC, can MBMS service synchronization parameter be provided in the MBMS business, thereby guarantee the synchronous of MBMS business for DRNC; Solved in esse technical problem in the prior art, and realized simple.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention, all any modifications of within spirit of the present invention and principle, being made, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. professional method of synchronized multimedia broadcast group broadcast MBMS between each radio network controller (RNC); Each RNC under the professional coverage that is covered of current MBMS realizes the MBMS service synchronization according to MBMS service synchronization parameter; It is characterized in that this method comprises:
When there is not common factor in the coverage that SRNC self is covered with this SRNC in the professional coverage that is covered of current MBMS; Calculate MBMS service synchronization parameter, the MBMS service synchronization parameter that calculates is issued each RNC under the professional coverage that is covered of current MBMS.
2. the method for claim 1 is characterized in that,
SRNC receives the MBMS session and sets up request message MBMS SESSION START; Judge whether coverage SA tabulation of carrying in the MBMS SESSION START message and the SA tabulation that this SRNC self stores exist common factor; If not, then SRNC judges the coverage that the professional coverage that is covered of current MBMS and this SRNC self covered and does not have common factor.
3. method as claimed in claim 2 is characterized in that, said calculating MBMS service synchronization parameter comprises:
After there is not common factor in the SA tabulation that SRNC judges the SA tabulation of carrying in the MBMS SESSION START message and this SRNC self storage, set up the MAC entity that is used to calculate MBMS service synchronization parameter according to the MBMS business information of carrying in the MBMS SESSION START message;
Said calculating MBMS service synchronization parameter comprises:
Calculate MBMS service synchronization parameter by said MAC entity.
4. method as claimed in claim 3; It is characterized in that; There is not the back of occuring simultaneously in the SA tabulation that SRNC judges the SA tabulation of carrying in the MBMS SESSIONSTART message and this SRNC self storage, set up be used to calculate the MAC entity of MBMS service synchronization parameter before, this method further comprises:
SRNC sets up MBMS service surface information through creating the MBMS_IU entity.
5. method as claimed in claim 2 is characterized in that, the coverage that said SRNC self is covered with this RNC in the professional coverage that is covered of current MBMS does not exist when occuring simultaneously, and calculating MBMS service synchronization parameter comprises:
Said each RNC sends the request message that obtains MBMS service synchronization parameter to SRNC after the MBMS SESSION START message of receiving from core net CN;
SRNC is after receiving the request message that obtains MBMS service synchronization parameter, and the MBMS business information of carrying in the MBMS SESSION START message that receives according to this SRNC is set up the MAC entity that is used to calculate MBMS service synchronization parameter;
Said calculating MBMS service synchronization parameter comprises:
Calculate MBMS service synchronization parameter by said MAC entity.
6. method as claimed in claim 5 is characterized in that, after each RNC receives the MBMSSESSION START message from CN, to SRNC send obtain the request message of MBMS service synchronization parameter before, this method further comprises:
Each RNC sets up MBMS service surface information through creating the MBMS_IU entity, distributes local resource through creating the MBMS_IUR entity.
7. method as claimed in claim 5 is characterized in that, the MBMS business information of carrying in the MBMSSESSION START message that receives according to this SRNC is set up and is used to calculate after the MAC entity of MBMS service synchronization parameter, and this method further comprises:
SRNC distributes local resource and Radio Resource through creating the MBMS_IUR entity.
8. method as claimed in claim 7 is characterized in that, after said distribution local resource and the Radio Resource, this method further comprises:
SRNC replys the MBMS synchronous bearer to said each RNC and sets up responding MBMS SYNCBEARER SETUP RSP message;
In the sub-district that said each RNC administered, set up Common transport channel MTCH channel through creating the MBMS_IUB entity by the professional cell covered of current MBMS;
Said each RNC replys MBMS session beginning responding MBMS SESSION STARTRESPONSE message to CN.
9. method as claimed in claim 5 is characterized in that, the MBMS business information of carrying in the said MBMS SESSION START message that receives according to this SRNC is set up and is used to calculate before the MAC entity of MBMS service synchronization parameter, and this method further comprises:
SRNC sets up MBMS service surface information through creating the MBMS_IU entity, and after MBMS service surface information is set up successfully, returns MBMS SESSION START RESPONSE message to CN.
10. like the said method of the arbitrary claim of claim 1 to 9, it is characterized in that,
Said MBMS service synchronization parameter comprises: Connection Frame Number CFN information and transformat TF information.
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