CN101604995B

CN101604995B - Method and system for realizing MBMS synchronization among RNC

Info

Publication number: CN101604995B
Application number: CN 200810114725
Authority: CN
Inventors: 童树鸿; 洪海; 丁华锋; 何军宝
Original assignee: Potevio Institute of Technology Co Ltd
Current assignee: Potevio Information Technology Co Ltd
Priority date: 2008-06-11
Filing date: 2008-06-11
Publication date: 2013-03-27
Anticipated expiration: 2028-06-11
Also published as: CN101604995A

Abstract

The invention discloses a method for realizing MBMS synchronization among RNC, which comprises the following steps: primarily dividing the RNC into two types of a service RNC (SRNC) and drifting RNCs (DRNCs); determining RNC, SRNC and DRNC of an MBMS service; building an Iur load between the SRNC and each DRNC, wherein the SRNC and each DRNC are MBMS business distribution physical resources; receiving MBMS service data by the SRNC, processing a GTPU layer, a PDCP layer and an RLC layer to obtain MBMS data packets, increasing an MAC-MT to complete the public processing of an MAC layer of the MBMS business, for example, appointing a transmission form and timestamp information for each MBMS data packet, and transmitting to each DRNC through the Iur load; and transmitting the received business data to a cell in the RNC by the SRNC and the DRNCs. The invention also discloses a system for realizing the MBMS service. The invention can improve the resource utilization rate, and ensures the continuity of the MBMS business.

Description

A kind of synchronous method and system of MBMS of between RNC, realizing

Technical field

The present invention relates to TD SDMA access (TD-SCDMA) technology, particularly a kind of synchronous method of multimedia broadcast-multicast service (MBMS) that between radio network controller (RNC), realizes.

Background technology

The MBMS business is a very important business in the numerous business of TD-SCDMA system.

Fig. 1 is the protocol stack schematic diagram of existing MBMS business.Referring to Fig. 1, the protocol stack entity that the MBMS business relates to comprises: service universal grouping wireless business supporting node (SGSN), RNC and base station (Node B), wherein, comprise among the RNC: GPRS Tunnel Protocol-user's face (GTPU)/data packet compressing agreement (PDCP)/radio link control (RLC), MBMS service media access control-(Mac-m), IUB user's Frame Protocol (IUB-FP) etc.Below in conjunction with Fig. 1, the business data transmission process of existing MBMS business is described:

When needs carry out the MBMS business, SGSN in the core net begins to ask by each RNC initiation MBMS session to this MBMS traffic aided of Iu mouth, set up the Iu carrying with described each RNC, the Service Data Unit (SDU) that after this, will carry the MBMS business datum by this Iu carrying of SGSN sends to each RNC;

After GTPU among each RNC receives the SDU of MBMS business, remove GTPU head wherein, and will remove SDU after the GTPU head and send to PDCP and carry out head and compress, afterwards, by RLC described SDU after the head compression is segmented into a plurality of protocol Data Units (PDU), and be distributed to the Mac-m of each residential quarter, finish the MAC head by the Mac-m of each residential quarter and fill in (comprise and fill in TCTF and MBMS ID etc.), and PDU carried out in the residential quarter the professional scheduling of MBMS, MBMSPDU after the scheduling is sent to IUB-FP form the FP frame, by each IUB-FP described FP frame is sent to corresponding Node B by the Iub mouth at last, Node B sent the FP frame in the time of eating dishes without rice or wine of appointment.

In actual applications, same MBMS business may relate to a plurality of RNC, that is: the same time may be transmitted identical MBMS business datum in a plurality of different RNC, this is so that realize the very necessary synchronously of MBMS business between different RNCs and between the different districts in the same RNC, this be because:

1) professional for same MBMS, the described normally adjacent RNC of a plurality of RNC that relates to, if resource and content between described a plurality of adjacent R NC are asynchronous, then the signal between each RNC not only can't become the multipath gain, to become interference on the contrary, this will have a strong impact on the normal reception of MBMS business.Same, if can't realize also will existing and above-mentioned the same problem synchronously between the neighbor cell in same RNC.

2) along with the further commercialization of TD-SCDMA system, MBMS is as the key property of TD-SCDMA, guarantee that the MBMS business continuity between the whole network RNC is very necessary, this also requires between different RNCs and realizes the synchronous of MBMS business between the neighbor cell in the same RNC.

There is the method that realizes the MBMS service synchronization between a kind of neighbor cell in same RNC in the existing TD-MBMS industry standard.The method adopts the N frequency with time slot net (UTN) networking mode, between the neighbor cell of same MBMS business, adopt identical frequency, time slot, code channel and scrambler, perhaps identical frequency, time slot, code channel and residential quarter scrambler separately, the MBMS business datum that the synchronized transmission content is identical, so that the MBMS service signal between neighbor cell becomes gain rather than interference in the RNC, this function realizes in each instrument factory commercial city.But the method only can solve the MBMS service synchronization problem in the residential quarter, can't solve the MBMS service synchronization between RNC.

Prior art has proposed some imaginations for stationary problem between the RNC of MBMS business, for example: by bringing the interference of avoiding between adjacent R NC setting up residential quarter isolation between adjacent R NC, but, this scheme has been brought very large difficulty to the network planning on the one hand, so that the resource of isolation strip can not effectively be utilized, brought the loss of gain on the other hand the UE that is in the edge zone.

As seen, in the urgent need to proposing a kind of simple and effective technical scheme that between RNC, realizes the MBMS service synchronization, to improve the continuity of resource utilization, assurance the whole network MBMS business.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of method and system of realizing the MBMS service synchronization between RNC, to improve the continuity of resource utilization, assurance the whole network MBMS business.

For achieving the above object, technical scheme of the present invention specifically is achieved in that

A kind of synchronous method of multimedia broadcast-multicast service MBMS that realizes between radio network controller (RNC) is divided into RNC two classes in advance: Serving RNC SRNC and Drift Radio Network Controller DRNC, and the method also comprises:

With the RNC of same MBMS traffic aided in determine one as SRNC, with remaining RNC as DRNC;

Set up the Iur carrying between SRNC and each DRNC, SRNC and each DRNC are described MBMS traffic assignments physical resource;

The business datum of the described MBMS business that SRNC reception core net issues, and the business datum of described MBMS business is carried out unified GTPU, PDCP and rlc layer process, obtain the MBMS packet, be each described MBMS packet given transmission form and timestamp information CFN, the MBMS business data packet after will processing by the described Iur carrying of setting up again sends to each DRNC;

SRNC and DRNC be according to transformat and the timestamp information of described appointment, the business datum that receives sent to the residential quarter in this RNC on the physical resource of described distribution.

Preferably, in SRNC, increase in advance the MAC-MT entity, be used for carrying out described operation for each MBMS packet given transmission form and timestamp information.

Preferably, describedly between SRNC and each DRNC, set up Iur carrying and comprise:

SRNC sends the Iur carrying of carrying described MBMS business information and SRNC address information to each DRNC and sets up Indication message, indicates each DRNC to set up the Iur carrying;

After described each DRNC receives described Iur carrying and sets up Indication message, according to described MBMS business information and SRNC address information, set up with described SRNC between the Iur carrying, and the result of Iur carrying foundation sent to SRNC.

Preferably, before described SRNC set up request message to each DRNC transmission Iur carrying, the method further comprises: each DRNC sent Iur carrying request to SRNC and sets up message, asks SRNC to set up the Iur carrying.

Preferably, describedly comprise for each MBMS packet fixed time stamp information:

SRNC obtains Iur mouth node deviation between self and each DRNC and the Iub mouth deviation in each DRNC;

SRNC determines the timestamp information of described MBMS packet according to described Iur mouth node deviation and Iub mouth deviation.

Preferably, the Iur mouth node deviation obtained between self and each DRNC of described SRNC comprises:

SRNC sends MBMS descendant node synchronization frame to each DRNC, and carries the time when issuing this synchronization frame;

After each described DRNC receives this MBMS synchronisation of nodes message, return MBMS upstream node synchronization frame to SRNC, and carry time T 1, the DRNC that SRNC issues described MBMS descendant node synchronization frame and receive the time T 2 of described MBMS descendant node synchronization frame and the time T 3 that DRNC reports described MBMS upstream node synchronization frame;

SRNC receives the described MBMS upstream node synchronization frame of each DRNC feedback, and according to the Iur mouth node deviation between the T1 that wherein carries, T2 and T3 calculating SRNC and corresponding DRNC.

Preferably, the Iub mouth deviation obtained in each DRNC of described SRNC comprises:

SRNC sends MBMS down-going synchronous frame to each DRNC;

After each DRNC receives described MBMS down-going synchronous frame, collect maximum Iub mouth deviation in the residential quarter, the professional place of described MBMS, and this Iub deviation is scaled timestamp information CFN, this CFN is carried in the MBMS uplink synchronous frame sends to SRNC;

SRNC extracts described CFN from the MBMS uplink synchronous frame that is received from each DRNC, it is scaled Iub mouth deviation and preservation.

Preferably, when DRNC determined that Iub deviation maximum in self residential quarter changes, the method further comprised:

DRNC is scaled timestamp information CFN with the Iub of current maximum, this CFN is carried at MBMS adjusts synchronously and send to SRNC in the frame;

SRNC adjusts synchronously from the MBMS that receives and extracts described CFN the frame, and it is scaled Iub mouth deviation and preservation.

Preferably, the transformat of the business datum rlc layer processed by the described Iur carrying of setting up of described SRNC and the appointment of described MAC-MT entity and timestamp information together send to each DRNC and comprise:

Business datum after SRNC organizes rlc layer to process according to the Iur FP frame that sets in advance and transformat and the timestamp information of described MAC-MT entity appointment, and the Iur FP frame that forms sent to each DRNC by the described Iur carrying of setting up.

Preferably, described SRNC and each DRNC are that described MBMS traffic assignments physical resource is:

SRNC is described MBMS traffic assignments physical resource, and to notify each DRNC be the described MBMS traffic assignments physical resource identical with physical resource that SRNC distributes.

Preferably, to notify each DRNC be that the described MBMS traffic assignments physical resource identical with physical resource that SRNC distributes is to described SRNC:

Be handed down to each DRNC in message when SRNC will be carried at for the physical resource information of described MBMS traffic assignments described Iur carrying and set up.

Preferably, between SRNC and each DRNC, set up Iur carrying before, the method further comprises: SRNC receives the MBMS service conversation request of core net, sets up the Iu carrying between SRNC and core net, is used for transmitting the business datum of described MBMS business;

When described MBMS service conversation finishes, the method further comprises: SRNC receives the MBMS service conversation ending request that core net sends, the Iu carrying and the SRNC that discharge between SRNC and core net are the physical resource of described MBMS traffic assignments, and notify each DRNC, discharge the physical resource that the described Iur that sets up carried and be described MBMS service conversation distribution.

A kind of MBMS business realizing system is used for realizing the MBMS service synchronization between RNC, and this system comprises: SGSN, with all RNC of described MBMS traffic aided, wherein, a RNC among described all RNC is as SRNC, remaining RNC is as DRNC;

Described SGSN is for the business datum that issues described MBMS business to SRNC;

Described SRNC, be used for and each DRNC between set up the Iur carrying, and be the business datum of described MBMS traffic assignments physical resource, the described MBMS business of reception; And the business datum of the described MBMS business that receives carried out unified GTPU, PDCP and rlc layer is processed, obtain the MBMS packet, be each described MBMS packet given transmission form and timestamp information, by the described Iur carrying of setting up the business datum of rlc layer processing and transformat and the timestamp information of appointment sent to each DRNC again; On the physical resource that distributes, the business datum that receives sent to the residential quarter in this RNC;

Described DRNC is used to MBMS traffic assignments physical resource, and on the physical resource that distributes, and the transformat and the timestamp information that issue according to SRNC send to residential quarter in this RNC with the business datum of the MBMS business that receives.

Preferably, described SRNC comprises session management unit, GTPU/PDCP/RLC entity, MAC-MT entity, IUR-FP entity, MAC-M entity and IUB-FP entity;

Described session management entity is used for carrying out the management of MBMS service conversation with SGSN, is described MBMS traffic assignments physical resource, and the physical resource that distributes is sent to each DRNC, sets up the Iur carrying between described IUR-FP entity and DRNC;

Described GTPU/PDCP/RLC entity is used for receiving the business datum of described MBMS business, and carries out unified GTPU, PDCP and RLC processing, and result is sent to the MAC-MT entity;

Described MAC-MT entity, the scheduling service data that is used to described GTPU/PDCP/RLC entity to issue, given transmission form and timestamp information CFN, and the business datum that receives and transformat and the timestamp information of appointment be handed down to IUR-FP entity and MAC-M entity;

Described IUR-FP entity is used for setting up the Iur carrying with each DRNC, and the business datum that described MAC-MT entity is issued and transformat and timestamp information exchange are crossed described Iur carrying and sent to each DRNC;

Described MAC-M entity, the information that is used for issuing according to described MAC-MT entity is added the MAC head for the business datum that receives and is dispatched;

Described IUB-FP entity is used for the business datum of MAC-M entities scheduling is formed the FP frame, sends to residential quarter in this RNC from the Iub mouth.

Preferably, described DRNC comprises session management entity, IUR-FP entity, MAC-M entity and IUB-FP entity;

Described session management entity is used for the notice according to SRNC, the physical resource that the physical resource that distributes for MBMS traffic assignments and SRNC is identical;

Described IUR-FP entity is used for setting up the Iur carrying with SRNC, receives the MBMS business datum that described SRNC sends, and is transmitted to described MAC-M entity;

Described MAC-M entity is used for the data that the IUR-FP entity issues are carried out the data dispatch same with described SRNC, and adds the MAC head;

As seen from the above technical solution, among the present invention, in advance RNC is divided into Serving RNC (SRNC) and Drift Radio Network Controller (DRNC), with the RNC of same MBMS traffic aided in determine one as SRNC, with remaining RNC as DRNC.In MBMS service conversation process, between SRNC and each DRNC, set up the Iur carrying, be MBMS traffic assignments physical resource by SRNC and each DRNC; Then, SRNC receives the business datum of the MBMS business that core net issues, and the business datum that receives is carried out unified GTPU, PDCP and rlc layer is processed, and obtains the MBMS packet; Be each MBMS packet given transmission form and timestamp information by MAC processing entities MAC-MT entity newly-increased among the SRNC again, and the MBMS business data packet of carrying after will processing by the Iur that sets up send to each DRNC; At last, SRNC and DRNC be according to transformat and the timestamp information of appointment, the business datum that receives sent to the residential quarter in this RNC on the physical resource that distributes.By the way, carry out unified RLC segment processing by the MBMS business datum that SRNC issues core net, and carried out the selection of transformat (TF), timestamp information (CFN) by the MAC-MT entity, again with the data distributing after selection result and the RLC segment processing to DRNC, thereby guarantee that the MBMS business datum in transmission keeps content synchronization between adjacent R NC, to improve the continuity of resource utilization, assurance the whole network MBMS business.

Further, the MAC-MT entity that increases in the MBMS of SRNC service protocol stack among the present invention can guarantee content synchronization and the TF that carries out and CFN select operation to be finished by the MAC layer, thereby has realized consistency and continuity with existing protocol.

Description of drawings

Fig. 1 is the protocol stack schematic diagram of existing MBMS business.

Fig. 2 is the overview flow chart of realizing MBMS service synchronization method between RNC provided by the invention.

Fig. 3 is the overall construction drawing of MBMS business realizing provided by the invention system.

Fig. 4 is the protocol stack schematic diagram of MBMS business in the embodiment of the invention.

Fig. 5 is the particular flow sheet of realizing MBMS service synchronization method in the embodiment of the invention between RNC.

Embodiment

For making purpose of the present invention, technical scheme and advantage clearer, referring to the accompanying drawing embodiment that develops simultaneously, the present invention is described in further detail.

Main thought of the present invention is: will determine a SRNC among the RNC of same MBMS traffic aided, and in SRNC newly-increased MAC-MT entity, for the MBMS business datum is unified given transmission form and timestamp information, and send to other DRNC except SRNC, thereby guarantee the content synchronization of MBMS business data transmission between each RNC.

Fig. 2 is the overview flow chart of realizing MBMS service synchronization method between RNC provided by the invention.As shown in Figure 2, the method flow process comprises:

Step 201 is divided into RNC SRNC and DRNC two classes in advance, with the RNC of same MBMS traffic aided in determine one as SRNC, with remaining RNC as DRNC.

Step 202 is set up the Iur carrying between SRNC and each DRNC, SRNC and each DRNC are described MBMS traffic assignments physical resource.

Among the present invention, between SRNC and each DRNC, set up the Iur carrying, be used for transferring MBMS service data and relevant control information between RNC.For the distribution of physical resource, can adopt existing mode to realize.

Step 203, SRNC receives the MBMS business datum that core net issues, and this business datum is carried out unified GTPU, PDCP and rlc layer processing, obtains the MBMS packet; Be each MBMS packet given transmission form and timestamp information by the MAC-MT entity of setting up among the SRNC, the MBMS business data packet after will processing by the Iur carrying of setting up again sends to each DRNC.

In this step, finished the rlc layer segment processing of MBMS business datum by SRNC, and carry out unified scheduling at newly-increased MAC-MT, with given transmission form and timestamp information; Then, the MBMS business data packet after SRNC will process sends to each DRNC, and carries therein transformat and the CFN of appointment, thereby guarantees that each RNC is to the content synchronization of MBMS business.

Step 204, SRNC and DRNC be according to transformat and the timestamp information of appointment in the step 203, the business datum that receives sent to the residential quarter in this RNC on the physical resource that distributes.

So far, method flow of the present invention finishes.

Fig. 3 is the overall construction drawing of MBMS business realizing provided by the invention system.Above-mentioned method shown in Figure 2 namely can be implemented in system shown in Figure 3.Particularly, as shown in Figure 3, this system is used for realizing the MBMS service synchronization between RNC, comprises: SGSN, with all RNC of described MBMS traffic aided, wherein, a RNC among described all RNC is as SRNC, remaining RNC is as DRNC.

Wherein, SGSN is for the business datum that issues described MBMS business to SRNC;

Described DRNC is used to MBMS traffic assignments physical resource, and on the physical resource that distributes, the transformat and the timestamp information that issue according to SRNC, and the MBMS business datum that described SRNC is transmitted sends to the residential quarter in this RNC.

Realized that in above-mentioned overall procedure and system the resource of the unified management of MBMS service conversation and the MBMS business tine between RNC distributes consistent synchronous.In addition, among the present invention, on the one hand, synchronous for realizing physical resource, can also be when carrying out physical source distributing, the resource allocation result of SRNC is handed down to each DRNC, each DRNC adopts the mode identical with SRNC to carry out physical source distributing, thereby guarantees the source synchronous between RNC; On the other hand, for realizing time synchronized, can be when MAC-MT entity setting up timestamp information CFN, the Iur mouth deviation between consideration RNC and the Iub mouth deviation between each DRNC and corresponding NodeB, thereby CFN rationally is set, the time synchronized when guaranteeing transferring MBMS service data between RNC.

Below just by specific embodiment, specific implementation of the present invention is described in further details.In the present embodiment, the protocol stack of MBMS business is revised, to adapt to better the needs of MBMS service synchronization between RNC.Concrete, be illustrated in figure 4 as the schematic diagram of MBMS service protocol stack in the embodiment of the invention, also be that a concrete structure of system shown in Figure 3 forms schematic diagram.As seen from Figure 4, in this protocol stack, the MBMS business datum only enters the GTP-U/PDCP/RLC entity of SRNC and processes, and has increased the MAC-MT entity in SRNC, to finish transformat and the time stamp setting to the MBMS business datum; In addition, in each RNC, all increase the IUR-FP entity, and between SRNC and each DRNC, had the Iur carrying.The concrete function of each entity describes in detail with operating in the following method flow in the concrete protocol stack.

Fig. 5 is the method particular flow sheet of realizing the MBMS service synchronization in the embodiment of the invention between RNC.This flow chart is to implement idiographic flow of the present invention under protocol stack shown in Figure 4, and as shown in Figure 5, the method flow process comprises:

Step 501, with the RNC of same MBMS traffic aided in determine one as SRNC, with remaining RNC as DRNC.

In this step, can determine RNC role by OM configuration mode or signaling procedure.

Step 502, SRNC sets up the Iu carrying after receiving that the MBMS session of core net initiation begins request, is that the MBMS service conversation distributes physical resource, and successful to core net answer session.

In this step, between SRNC and core net, set up Iu carrying, be used for receiving MBMS business datum that core net issues and business control information etc., thereby guarantee to be finished by SRNC and core net the unified management of MBMS business.

Set up the Iur carrying in this step and distribute the operation of physical resource to finish by the session management entity among the SRNC (the Control Plane among Fig. 4).

Step 503 is set up Iur carrying between SRNC and each DRNC, and the identical physical resource of the physical resource that to notify each DRNC be the MBMS traffic assignments distributes with SRNC.

Be transmission information between SRNC and each RNC, set up the Iur carrying.The mode that concrete Iur carrying is set up can for:

SRNC sends the Iur carrying of carrying MBMS service identification information TMGI and SRNC address information to each DRNC and sets up Indication message, and indication DRNC sets up the Iur carrying.This message is specially the MBMS COMMON TRANSPORT CHANNELRESOURCES REQUEST message shown in the table 1 in the present embodiment.Preferably, at the present embodiment, comprise the physical resource information that SRNC distributes in this message, to notify each DRNC to distribute identical physical resource, realize source synchronous, particularly, set up request message in the Iur carrying that issues in the present embodiment and carry TMGI, SRNC sign (id), MBMS service area tabulation (SA List), service rate, the shared frequency of this business, time slot, code channel, scrambler, the information such as logic channel, the information such as whether multiplexing, the multiplexing skew of 64k business and multiplexing cycle.

IE/Group Name (element/group name)

Presence (whether occurring)

Range (scope)

IE Type and Reference (element type and quote)

Semantics Description (semantic description)

Criticality (key)

Assigned Criticality (assignment is crucial)

Message Type (type of message)

M

9.2.1.40

YES

reject

Transaction ID (transmission sign)

M

9.2.1.59

-

TMGI (Temporary Mobile Group Identity)

M

9.2.1.80

SRNC ID

M

RNC-ID 9.2.1.50

YES

reject

MBMS Service Area (MBMS service area)

M

OCTET STRING

YES

reject

MBMS Bearer Service Type (MBMS service bearer type)

M

9.2.3.39

YES

reject

Binding ID (binding logo)

O

9.2.1.3

YES

ignore

Transport Layer Address (transport layer address)

O

9.2.1.62

YES

ignore

MBMS Service Resource Container (MBMS service resources container)

O

Bit String

Table 1

In table 1, comprise that SRNC is the frequency that the MBMS business is distributed among the MBMS Service Resource Container (MBMS service resources container), time slot, code channel, scrambler, the information such as logic channel, the information such as whether multiplexing, the multiplexing skew of 64k business and multiplexing cycle, namely the physical resource information of unified distribution; It is professional that Temporary Mobile Group Identity (TMGI) is used for identifying concrete MBMS, and it is the professional of which service area and carrying form that should business that MBMS Service Area and MBMS Bearer Service Type specify; Binding ID and Transport Layer Address are used to indicate the transport layer address of SRNC.

DRNC sets up the Iur relevant bearer after receiving above-mentioned MBMS COMMON TRANSPORT CHANNELRESOURCES REQUEST message.Preferably, be that the MBMS service conversation distributes physical resource according to the mode identical with SRNC, and reply MBMSCOMMON TRANSPORT CHANNEL RESOURCES RESPONS E message as shown in table 2, result's (success/failure is set up in notice SRNC carrying, and failure cause), TMGI, Transport LayerAddress, Transaction ID and Transport Bearer ID.

IE/Group Name

Presence

Range

IE Type and Reference

Semantics Description

Criticality

Assigned Criticality

Message Type

M

9.2.1.40

YES

reject

Transaction ID

M

9.2.1.59

-

TMGI

M

9.2.1.80

Binding ID

O

9.2.1.3

YES

ignore

Transport Layer Address

O

9.2.1.62

YES

ignore

Criticality Diagnostics (key diagnostic) shows the result

O

9.2.1.13

YES

Ignore

Table 2

Above-mentionedly be a kind of Iur carrying that the present embodiment provides and set up mode.On this mode basis, can also further before Indication message be set up in SRNC transmission Iur carrying, send the Iur carrying of carrying described MBMS identification information and DRNC identification information by each DRNC to SRNC and set up request message, active request SRNC sets up the Iur carrying.For example the present embodiment adopts MBMS DRNC signal connection indication MBMS DRNC SIGNAL CONNECTION INDICATION message to carry as Iur and sets up request message, and the form of this message is as shown in table 3.

IE/Group Name

Presence

Range

IE Type and Reference

Semantics Description

Criticality

Assigned Criticality

Message Type

M

9.2.1.40

YES

reiect

Transaction ID

M

9.2.1.59

-

TMGI

M

9.2.1.80

DRNC ID

O

RNC-ID 9.2.1.50

DRNC id

YES

ignore

Table 3

In this step, the operation that carrying is set up about Iur can be finished by the session management entity among the SRNC (the Control Plane shown in Fig. 4).

Step 504 in SRNC, is carried out unified GTPU, PDCP and rlc layer processing to the MBMS business datum that receives.

In this step, utilize the GTPU/PDCP/RLC entity among the SRNC that the business datum that receives is unified to process.The protocol function of concrete this entity is constant, and the MBMS business datum is unified segmentation, forms a plurality of RLC PDU.

In addition, in existing protocol stack, GTPU/PDCP/RLC entity by SRNC is processed the MBMS business datum, and by the Iur carrying of setting up the data after the GTPU/PDCP/RLC entity handles among the SRNC are sent to each DRNC, thereby guarantee that SN corresponding to identical RLC PDU is identical, be that each RNC shares same Iu data flow, so just guaranteed that data content is consistent between RNC, avoid because the data difference that Iu mouth chain-circuit time delay and packet loss cause.

Step 505, the MAC-MT entity that increases newly among the SRNC are that the data after step 504 is processed arrange transformat and timestamp information CFN.

Newly-increased MAC-MT entity among the SRNC of the present embodiment, the public MAC that finishes the MBMS business processes.A MBMS business only has a MAC-MT entity in the scope of its synchronized broadcasting, be positioned at SRNC, the United Dispatching of finishing service, namely specify RLC PDU number (being transformat TF) and the timestamp information (CFN) that sends in certain TTI that eats dishes without rice or wine, thereby guarantee that each RNC sends same data content at one time.Certainly, the function that the MAC-MT entity is finished can be not limited only to specify TF and CFN, and according to the needs of expanded application, the public MAC that can also utilize this MAC-MT entity to finish other processes.

Step 506, the information of utilizing among the SRNC data after newly-increased Iur FP entity is processed step 504 and step 505 to arrange sends to the Iur FP entity of each DRNC by the Iur carrying of setting up; The information that data after utilizing MAC-MT entity among the SRNC that step 504 is processed and step 505 arrange directly sends to the MAC-M entity of each residential quarter under this SRNC, sends to NodeB by corresponding MAC-M entity structure FP frame.

In this step, on the one hand, the Iur carrying that the MBMS business datum utilization that SRNC is received is set up sends to each DRNC, concrete mode can for:

Utilize the data after Iur FP entity newly-increased among the SRNC is processed step 504 to become the Iur FP frame shown in the table 4 with the Information Organization that step 505 arranges, send to the Iur FP entity of each DRNC.

Table 4

In table 4, Header CRC is Iur FP frame header CRC; FT is frame type indication (control frame or Frame); TFI is that MAC-MT carries out the transformat indication after TF selects; CFN is for connecting frame number (scheduling delivery time), and namely SRNC unifies the transmitting time of each DRNC of appointment; First TB is the content of first transmission block (TB); Last TB is the content of last TB; Pad is filler; Spare Extension is for reserving extension bits; Payload CRC is the CRC test value of data.

Utilize above-mentioned Iur FP frame, namely can realize the purpose that SRNC notifies each DRNC with MBMS business datum and relevant transformat and timestamp information.

On the other hand, the MAC-MT entity is directly issued each residential quarter MAC-M under this SRNC with business datum, transformat and timestamp, issues NodeB by MAC-M structure Iub FP frame, and concrete mode just repeats no more here with existing identical.

Step 507 after each DRNC resolves the Iur FP frame that receives, is forwarded to the MAC-M of each residential quarter in this RNC.

Step 508, DRNC and SRNC finish downlink data according to the CFN moment that arranges in the step 505 and transformat and send on the physical resource that distributes.

Operation by above-mentioned steps 504～505, unified transformat and CFN that the rlc layer of having realized SRNC is unified segment processing, MAC-MT specify, thereby making all RNC all carry out data according to this setting sends, assurance has realized content synchronization to the consistent consistency with a MBMS business datum contents processing.

After the transmission of finishing by the way all MBMS business datums, can finish this MBMS service conversation by core network requests, then carry out following steps:

Step 509, after SRNC received the MBMS conversation end request of core net initiation, response session finished, and discharging in Iu carrying and this RNC is the physical resource of this MBMS service conversation distribution.

Step 510, SRNC notifies each DRNC to discharge the physical resource that distributes for this MBMS service conversation in Iur carrying and this RNC.

The specific implementation of this step can send the MBMS COMMONTRANSPORT CHANNEL RESOURCES RELEASE REQUEST shown in the table 5 to all DRNC for: RNC, carries the MBMS service identification TMGI that will discharge in this message; DRNC receives and discharges the Iur carrying after this message and be the physical resource of corresponding MBMS traffic assignments, and will discharge result and MBMS service identification TMGI and be carried among the MBMS COMMON TRANSPORTCHANNEL RESOURCES RELEASE RESPONSE shown in the table 6 and feed back to SRNC.

IE/Group Name

Presence

Range

IE Type and Reference

Semantics Description

Criticality

Assigned Criticality

Message Type

M

9.2.1.40

YES

reject

Transaction ID

M

9.2.1.59

-

TMGI

M

9.2.1.80

Table 5

IE/Group Name

Presence

Range

IE Type and Reference

Semantics Description

Criticality

Assigned Criticality

Message Type

M

9.2.1.40

YES

reiect

Transaction ID

M

9.2.1.59

-

TMGI

M

9.2.1.80

Criticality Diagnostics

M

9.2.1.13

YES

Ignore

Table 6

Message in the table 6 is used for notice SRNC, and this DRNC discharges the result of relevant Iur carrying, and carries TMGI.Wherein, the release Iur carrying result who carries can only be success.

So far, the method idiographic flow of realizing the MBMS service synchronization in the present embodiment between RNC finishes.

Such as the implementation process of above-mentioned embodiment as seen, among the present invention, between DRNC and SRNC, set up the Iur carrying, when utilizing Iur mouth and Iur carrying to realize between RNC synchronously, from the newly-increased MAC-MT entity of agreement angle, the public MAC that finishes the MBMS service level processes (TF selection/CFN appointment), here, as previously mentioned, public MAC processes the MAC that can also further carry out other and processes, be not limited only to that TF selects and CFN specifies, expansion Iur-FP entity is distributed between the RNC of MBMS business datum after with the support isochronous schedules.

In addition, in above-mentioned steps 505, be more rational setup times stamp information CFN, SRNC can also further obtain self with each DRNC between Iur mouth node deviation and the interior Iub mouth deviation of each DRNC; And determine timestamp information according to described Iur mouth node deviation and the Iub mouth deviation obtained.

Wherein, Iur mouth deviation has reflected the deviation between the network element, obtains by synchronisation of nodes, is equal to the frame format definition among the definition of 3gpp.25.435r75.2 joint and the 6.3.3.4.Among the present invention, can utilize the time deviation between synchronisation of nodes acquisition SRNC and the DRNC network element.

Iub mouth deviation has reflected the deviation of the Iub port transmission channel of each RNC and its NodeB, this characteristic is defined in central 5.3 and 5.4 joints of 3gpp.25.435r7, can adjust the Iub port transmission channel deviation that obtains RNC and NodeB by transport channel synchronization and time, this deviation chart understands that RNC need to shift to an earlier date or certain data of delayed delivery at the Iub mouth, so that the business datum that sends drops within the receive window of nodeb, so that NodeB can in time send these data on eating dishes without rice or wine, otherwise be dropped owing to missing its delivery time after can making business datum arrive NodeB, so RNC adjusts the delivery time of data according to this Iub deviation.Among the present invention, adjust frame synchronously so that SRNC collects Iub deviation maximum in the DRNC by MBMS uplink synchronous frame, MBMS down-going synchronous frame and MBMS.

Next, introduce the detailed process of determining timestamp information.

For Iur mouth deviation:

Step a, SRNC sends MBMS descendant node synchronization frame to each DRNC, the MBMS DL NODE SYNCHRONISATION in the present embodiment, and carry time T 1 when issuing this synchronization frame, be used for the Iur mouth deviation between this SRNC of acquisition request and corresponding DRNC;

The structure of concrete MBMS DL NODE SYNCHRONISATION can be as shown in table 7, and wherein T1 is the time (take 125us as unit) of SRNC when issuing MBMS DL NODE SYNCHRONISATION frame.

Table 7

Step b, after each DRNC receives this MBMS synchronisation of nodes message, return MBMS upstream node synchronization frame to SRNC, be MBMS UL NODE SYNCHRONISATION in the present embodiment, and carry time T 1, the DRNC that SRNC issues this MBMS DL NODE SYNCHRONISATION and receive the time T 2 of MBMS DL NODE SYNCHRONISATION and the time T 3 that DRNC reports MBMS UL NODE SYNCHRONISATION;

Wherein, the structure of MBMS UL NODE SYNCHRONISATION can be as shown in table 8.T1, T2 and T3 are also take 125us as unit.

Step c, SRNC receive the MBMS UL NODESYNCHRONISATION of each DRNC feedback, and according to the Iur mouth node deviation between the T1 that wherein carries, T2 and T3 calculating SRNC and corresponding DRNC.

For Iub mouth deviation:

Step a ', SRNC sends MBMS down-going synchronous frame to each DRNC, is MBMS DL SYNCHRONISATION in the present embodiment, the Iub deviation of each Iub mouth of acquisition request;

Wherein, MBMS DL SYNCHRONISATION can adopt the structure shown in the table 9.Control Frame is type of message (showing it is which kind of control frame), and the seqNum message SN rewinds in MBMS UL SYNCHRONISATION message.

Table 8

Table 9

Step b ', after each DRNC receives MBMS DL SYNCHRONISATION, collect maximum Iub mouth deviation in the residential quarter, the professional place of MBMS, and this Iub deviation is scaled timestamp information CFN, this CFN is carried in the MBMS uplink synchronous frame sends to SRNC, this MBMS uplink synchronous frame is MBMS UL SYNCHRONISATION in the present embodiment;

Wherein, MBMS DL SYNCHRONISATION can adopt structure as shown in table 10.DRNC keeps the iub_offset_drnc of each residential quarter maximum, is converted into CFN_DRNC, and the computational methods of concrete CFN are identical with existing mode.Why to be converted into that CFN passes to SRNC and the reason that directly do not pass iub_offset_drnc is, iub_offset_drnc is an absolute value, the start-up time of depending on each RNC and NodeB, and CFN is a relative value, shield the Startup time difference of each RNC and Node B, reflected more accurately the Iub mouth deviation of DRNC.

Table 10

Step c ', SRNC extract described CFN from the MBMS UL SYNCHRONISATION that is received from each DRNC, it is scaled Iub mouth deviation and preservation.

SRNC can have the mode that CFN is scaled Iub mouth deviation multiple, for example can be in the following way: SRNC determines current self timestamp information CFN_SRNC, CFN_DRNC among the calculation procedure b ' and current self timestamp information CFN_SRNC's is poor, after again the difference result being multiply by 10, original Iub deviation of preserving with SRNC compares, if the difference of the two meets or exceeds default threshold value, then will multiply by result of calculation after 10 as the current Iub mouth deviation of new SRNC.

In addition, when DRNC finds that the Iub mouth deviation of self changes, the Iub of current maximum can be scaled timestamp information CFN, this CFN is carried at MBMS to be adjusted synchronously and initiatively sends to SRNC in the frame, should adjust frame synchronously in the present embodiment is the MBMSSYNCHRONISATION ADJUST shown in the table 11, SRNC extracts CFN from the MBMSSYNCHRONISATION ADJUST that receives, it is scaled Iub mouth deviation and preservation.Concrete conversion mode just repeats no more as previously mentioned here.

By the embodiment of the invention described above as seen, among the present invention, newly-increased MAC-mt entity in SRNC is used for the MBMS data are carried out United Dispatching, specifies TF and CFN, thereby realizes the content synchronization of MBMS business.This MAC-MT is the service level concept, MAC-M is the cell-level concept, and the relation object of MAC-mt and MAC-m is similar to the relation between MAC-d and the MAC-c, and this concept is equally applicable to the RNC inter-sync, just be equal to synchronously like this RNC inter-sync between RNC, thereby realized simply the content synchronization between RNC.

Table 11

In addition, can according to the Iub mouth deviation between the Iur mouth deviation between RNC and each DRNC and corresponding NodeB CFN be set at the MAC-MT entity, thus the time synchronized when guaranteeing transferring MBMS service data between RNC; Can also further SRNC be distributed to the resource notification DRNC of MBMS business, thereby guarantee the source synchronous between RNC.Like this, just can realize content, time and the source synchronous of MBMS business, thereby intactly realize the MBMS service synchronization between RNC.

As above implementation process of the present invention, utilized to greatest extent original RNC inter-sync mechanism, this scheme does not change protocol entity functions such as GTP-U, PDCP, RLC, Iub FP, only increases the MAC-MT entity newly, and has expanded MBMS Iur FACH FP function.Do not affect the network elements such as NodeB, UE, core net, BM-SC, implement effectively simple.

The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.All any modifications of doing within the spirit and principles in the present invention, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. between radio network controller (RNC), realize the synchronous method of multimedia broadcast-multicast service MBMS for one kind, it is characterized in that, in advance RNC is divided into two classes: Serving RNC SRNC and Drift Radio Network Controller DRNC, the method also comprises:

The business datum of the described MBMS business that SRNC reception core net issues, and the business datum of described MBMS business is carried out unified GTPU, PDCP and rlc layer process, obtain the MBMS packet, utilizing the MAC-MT entity that increases in SRNC in advance is each described MBMS packet given transmission form and timestamp information CFN, and the MBMS business data packet after will processing by the described Iur carrying of setting up again sends to each DRNC;

SRNC and DRNC be according to transformat and the timestamp information of described appointment, the business datum that receives sent to the residential quarter in this RNC on the physical resource of described distribution;

Wherein, describedly comprise for each MBMS packet fixed time stamp information: SRNC obtains Iur mouth node deviation between self and each DRNC and the Iub mouth deviation in each DRNC; SRNC determines the timestamp information of described MBMS packet according to described Iur mouth node deviation and Iub mouth deviation.

2. method according to claim 1 is characterized in that, describedly sets up Iur carrying comprise between SRNC and each DRNC:

3. method according to claim 2 is characterized in that, before described SRNC set up Indication message to each DRNC transmission Iur carrying, the method further comprises: each DRNC sent Iur carrying request to SRNC and sets up message, asks SRNC to set up the Iur carrying.

4. method according to claim 1 is characterized in that, the Iur mouth node deviation that described SRNC obtains between self and each DRNC comprises:

After each described DRNC receives this MBMS descendant node synchronization frame, return MBMS upstream node synchronization frame to SRNC, and carry time T 1, the DRNC that SRNC issues described MBMS descendant node synchronization frame and receive the time T 2 of described MBMS descendant node synchronization frame and the time T 3 that DRNC reports described MBMS upstream node synchronization frame;

5. method according to claim 1 is characterized in that, the Iub mouth deviation that described SRNC obtains in each DRNC comprises:

SRNC sends MBMS down-going synchronous frame to each DRNC;

After each DRNC receives described MBMS down-going synchronous frame, collect maximum Iub mouth deviation in the residential quarter, the professional place of described MBMS, and this Iub mouth deviation is scaled timestamp information CFN, this CFN is carried in the MBMS uplink synchronous frame sends to SRNC;

6. method according to claim 5 is characterized in that, when DRNC determined that Iub mouth deviation maximum in self residential quarter changes, the method further comprised:

DRNC is scaled timestamp information CFN with the Iub mouth deviation of current maximum, this CFN is carried at MBMS adjusts synchronously and send to SRNC in the frame;

7. method according to claim 1 is characterized in that, the business datum that described SRNC processes rlc layer by the described Iur carrying of setting up and the transformat of described MAC-MT entity appointment and timestamp information together send to each DRNC and comprise:

8. method according to claim 1 is characterized in that, described SRNC and each DRNC are that described MBMS traffic assignments physical resource is:

9. method according to claim 8 is characterized in that, it is that the described MBMS traffic assignments physical resource identical with physical resource that SRNC distributes is that described SRNC notifies each DRNC:

10. method according to claim 8, it is characterized in that, between SRNC and each DRNC, set up Iur carrying before, the method further comprises: SRNC receives the MBMS service conversation request of core net, between SRNC and core net, set up the Iu carrying, be used for transmitting the business datum of described MBMS business;

11. a MBMS business realizing system is used for realizing the MBMS service synchronization between RNC, it is characterized in that, this system comprises: SGSN, with all RNC of described MBMS traffic aided, wherein, a RNC among described all RNC is as SRNC, and remaining RNC is as DRNC; Described SRNC comprises the first session management entity, a GTPU/PDCP/RLC entity, a MAC-MT entity, an IUR-FP entity, a MAC-M entity and an IUB-FP entity;

Wherein, described the first session management entity is used for carrying out the management of MBMS service conversation with SGSN, is described MBMS traffic assignments physical resource, and the physical resource that distributes is sent to each DRNC, sets up the Iur carrying between a described IUR-FP entity and DRNC;

A described GTPU/PDCP/RLC entity is used for receiving the business datum of described MBMS business, and carries out unified GTPU, PDCP and RLC processing, and result is sent to a described MAC-MT entity;

A described MAC-MT entity, the scheduling service data that is used to a described GTPU/PDCP/RLC entity to issue, given transmission form and timestamp information CFN, and the business datum that receives and transformat and the timestamp information of appointment be handed down to a described IUR-FP entity and a described MAC-M entity; Wherein, determine the timestamp information of described MBMS packet according to the Iur mouth node deviation between SRNC and each DRNC and Iub mouth deviation;

A described IUR-FP entity is used for setting up the Iur carrying with each DRNC, and the business datum that a described MAC-MT entity is issued and transformat and timestamp information exchange are crossed described Iur carrying and sent to each DRNC;

A described MAC-M entity, the information that is used for issuing according to a described MAC-MT entity is added the MAC head for the business datum that receives and is dispatched;

A described IUB-FP entity, be used for will a described MAC-M entities scheduling business datum formation FP frame, send to residential quarter in this RNC from the Iub mouth;

12. system according to claim 11 is characterized in that, described DRNC comprises the second session management entity, the 2nd IUR-FP entity, the 2nd MAC-M entity and the 2nd IUB-FP entity;

Described the second session management entity is used for the notice according to SRNC, the physical resource that the physical resource that distributes for MBMS traffic assignments and SRNC is identical;

Described the 2nd IUR-FP entity is used for setting up the Iur carrying with SRNC, receives the MBMS business datum that described SRNC sends, and is transmitted to described the 2nd MAC-M entity;

Described the 2nd MAC-M entity is used for the data that described the 2nd IUR-FP entity issues are carried out the data dispatch same with described SRNC, and adds the MAC head;

Described the 2nd IUB-FP entity, be used for will described the 2nd MAC-M entities scheduling business datum formation FP frame, send to residential quarter in this RNC from the Iub mouth.