Realize synchronous method, system and equipment between radio network controller
Technical field
The present invention relates to mobile communication technology, synchronous method, system and equipment between particularly a kind of realization radio network controller (RNC, Radio Network Control).
Background technology
As a kind of emerging multimedia service, multi-media broadcasting service (MBMS, MultimediaBroadcast Multicast Service) caused the extensive concern of industry, regarded as the business that application prospect is arranged in the third generation digital communication (3G, 3rd Generation) very much by industry.The MBMS business is meant, mobile phone users receives the digital audio/video frequency content of the forms of broadcasting with the form of channel or channel on the portable terminal with operating system and video capability, as TV programme etc.
Current, for synchronous code division multiple access (TD-SCDMA of time-division, Time Division-SynchronousCode Division Multiple Access) MBMS business in the system such as, adopting multimedia broadcasting single frequency network (MBSFN, Multimedia Broadcast Single Frequency Network) under the condition of networking, belong between each minizone of a RNC, identical frequency, time slot, code channel can have been realized adopting preferably, the MBMS business datum that synchronized transmission is identical.
But, under a lot of situations, also need between the different RNC to carry out synchronously.Such as, for the portable terminal that is in two RNC coverage intersections, it can receive the signal from two RNC simultaneously, if but asynchronous between two RNC, like this, portable terminal receives time of two paths of signals will be inconsistent, one the tunnel is fast, one the road is slow, and that slow road signal is moved terminal possibly as the interference signal processing, thereby influence the normal reception of this road signal.
For addressing the above problem, a kind of MBMS Iur synchronization scenario has been proposed in the prior art, the specific implementation of this scheme comprises following two processes:
1) MBMS Iur data synchronization process:
Fig. 1 is existing MBMS Iur data synchronization process schematic diagram, this process realizes based on network architecture shown in Figure 2, for simplifying accompanying drawing, a target radio network controller (DRNC, Target Radio Network Control) and some important network entities have only been expressed among Fig. 2.As shown in Figure 1, may further comprise the steps:
Step 101: the RNC in the MBMS service area is configured to service wireless network controller (SRNC, Service Radio Network Control) and DRNC, and SRNC and DRNC are carried out identical physical channel, transmission channel and radio bearer (RB, Radio Bearer) dispose.
Here the service area of being mentioned is meant the professional corresponding coverage of a certain MBMS.Comprise in a certain service area which RNC is that operator can know in advance, so, in this step, operator can be according to self needs, each RNC in the service area is configured to SRNC and DRNC, promptly specifies a RNC as SRNC, other RNC is then as DRNC.Then, further SRNC and each DRNC that is disposed carried out identical physical channel, transmission channel and RB configuration.
Set up the Iur synchronous bearer between step 102:SRNC and each DRNC.
The process of setting up the Iur synchronous bearer in this step is towards disconnected process.As shown in Figure 3, Fig. 3 sets up the process schematic diagram for existing Iur synchronous bearer, wherein:
Step 1021:SRNC sets up request (Sync BearSetup Request) by Iur chain of command message MBMS synchronous bearer, initiates the Iur synchronous bearer and sets up process.
In this step, service center is initiated the MBMS business, and by the Iu interface between core net and the RNC, each RNC in service area comprises that SRNC and DRNC send session and begin (Session Start) signaling.Operator can configure the professional corresponding service area information with different MBMS in advance in service center, when service center is initiated a MBMS business, can send Session Start instruction to all RNC in the professional corresponding service of this MBMS zone.After each RNC receives this Session Start signaling, respectively by setting up transmission channel between core net and the service center, to be used to receive the MBMS business datum that the follow-up business center sends; Simultaneously, SRNC initiates the Iur synchronous bearer and sets up process.
Because SRNC does not also know in self place service area which DRNC is arranged, that is to say, SRNC and do not know in the whole network which RNC with self belong to same service area.So, generally, SRNC can all send MBMS Sync Bear Setup Request message by all RNC in whole network, wherein carries Temporary Mobile Group Identity (TMGI, Temporary Mobile Group Identifier), i.e. information such as MBMS service identification.
Step 1022: the DRNC in the service area is to SRNC loopback MBMS Sync Bear Setup response (Response) message.
After each RNC in the network receives MBMS Sync Bear Setup Request message from SRNC, carry out different processing: the DRNC that is positioned at same service area for those and SRNC, owing to received Session Start instruction in advance, so, these DRNC will distribute local synchronous bearer resource, set up the Iur synchronous bearer, and to SRNC loopback MBMS Sync Bear Setup Response message; And for the RNC that those and SRNC are positioned at the different business zone, then the MBMS SyncBear Setup Request message that receives is not handled.
Step 103:SRNC handles the MBMS business datum that is received from core net, and the Iur synchronous bearer that passes through to be set up is sent to each DRNC.
In this step, service center sends the MBMS business datum by core net all RNC in service area, each DRNC does not handle the MBMS business datum that receives, and after SRNC receives the MBMS business datum, then need to carry out Iu interface user plane (IuUP, Iu User Plane), user plane (the GTP-U of general packet wireless service tunnel protocol, General Packet Radio ServiceTunneling Protocol-User Plane), PDCP (PDCP, Packet DataConvergence Protocol) and Radio Link control (RLC, Radio Link Control) waits the processing of each layer protocol, pass through the Iur synchronous bearer set up then, send Iur Frame Protocol (FP, Frame Protocol) frame to each DRNC.Carry in each Iur FP frame: a Transmission Time Interval (TTI, Transmission Time Interval) the rlc protocol data cell (PDU that sends in, Protocol DataUnit) number, RLC PDU data and the information such as timestamp of eating dishes without rice or wine to send the Connection Frame Number zero hour (CFN, Connect Frame Number) of indicating these RLC PDU data.
Step 104: the MBMS business datum after the processing that each DRNC will receive sends to the MAC layer at multi-media broadcasting service (MAC_m) entity in local each sub-district.
MAC_m entity in each sub-district determines that according to the timestamp information that carries in the Iur FP frame the initial CFN of TTI that sends the RLC PDU data of carrying in the IurFP frame also sends constantly.
The above-mentioned process that is existing MBMS Iur data sync.By said process, belong between the RNC in the service area and shared same Iu data flow, and shared entities such as same PDCP and RLC, thereby from having avoided each RNC to handle inconsistent that the MBMS business datum is caused respectively in essence.In logic, SRNC has regarded the sub-district of each DRNC as local sub-district, has realized that by the Iur interface RLC entity continues to the data flow of MAC_m entity.
Need to prove that in MBMS business datum transport process or after transmit finishing, among SRNC and the DRNC either party all can initiate MBMS Iur synchronous bearer dispose procedure, as shown in Figure 4, Fig. 4 is existing MBMS Iur synchronous bearer dispose procedure schematic diagram.RNC1/RNC2 among Fig. 4 can be respectively SRNC/DRNC or DRNC/SRNC.That is to say, after core net sends conversation end (Session Stop) message by Iu interface all RNC in service area, SRNC or DRNC all can send the MBMS synchronous bearer to the other side and discharge (Sync Bear Release) message, discharge the Iur synchronous bearer of being set up.But the MBMS Sync Bear Release message that SRNC sends is to set up the DRNC of carrying with it at all, and the MBMS Sync Bear Release message that DRNC sends is then just at the carrying of setting up between self and the SRNC.The RNC that receives MBMS Sync Bear Release message will discharge local synchronous bearer resource.Need to prove that DRNC also can be because other reason is initiated Iur synchronous bearer dispose procedure, such as, itself breaks down DRNC, can not carry out normal data processing etc., and specific implementation repeats no more.
2) MBMS Iur time synchronization process:
In this programme, SRNC need calculate the timestamp of eating dishes without rice or wine to send the CFN zero hour of each RLC PDU, and stab computing time, needs then to consider that data send to the propagation delay time of DRNC from SRNC.In this programme, can obtain propagation delay time by following dual mode:
A, configuration be the maximum transmitted time delay fixedly: such as, linkage length between SRNC and each DRNC is in advance as can be known, so, can estimate propagation delay time between SRNC and each DRNC according to linkage length, and with the maximum transmitted time delay that estimates as fixing maximum transmitted time delay.Afterwards, SRNC calculates the timestamp of each RLC PDU according to being somebody's turn to do fixedly maximum transmitted time delay.
B, obtain synchronously by RNC Iur node: it is synchronous that SRNC and each DRNC carry out node respectively, and obtaining the propagation delay time of each DRNC, and the maximum of getting wherein stab computing time.Such as, SRNC sends test post to each DRNC, calculates this test post and comes and goes required time, thereby obtain one way transmission required time, and this time is propagation delay time.
In summary it can be seen, though existing MBMS Iur synchronization scenario can realize between the different RNCs synchronously, but, in existing MBMS Iur synchronization scenario, each RNC in the service area needs to set up transmission channel by core net and service center, by the MBMS business datum of this transmission channel reception from service center, but, each DRNC can not handle the MBMS business datum that is received from service center, has only SRNC just the MBMS business datum that receives can be handled the back and sends to each DRNC by the Iur synchronous bearer.That is to say that the transmission channel of setting up between each DRNC and the service center all is useless from saying in fact, thereby caused the waste of these bearing resources.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of synchronous method that realizes between radio network controller, can save bearing resource preferably.
Another object of the present invention is to provide a kind of synchronous system that realizes between radio network controller, can save bearing resource preferably.
A further object of the present invention is to provide a kind of RNC, can save bearing resource preferably.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of synchronous method that realizes between radio network controller (RNC), this method comprises:
RNC in the network is configured to service wireless network controller SRNC, and with different multi-media broadcasting service MBMS separately the corresponding service area information dispose to described SRNC, only give service center with the information configuration of described SRNC;
Described service center is initiated a MBMS business, and sends session start instructions to described SRNC;
Set up transmission channel between described SRNC and the described service center, and set up the Iur synchronous bearer with target radio network controller DRNC in the professional corresponding service of the MBMS of the described initiation zone;
Described SRNC receives MBMS business datum from service center by described transmission channel, and utilizes the DRNC in the MBMS business corresponding service zone of the Iur synchronous bearer set up and described initiation to carry out synchronously.
A kind of synchronous system that realizes between radio network controller (RNC), this system comprises:
Service center and service wireless network controller SRNC; Preserve different MBMS business corresponding service area information separately among the described SRNC, only dispose the information of described SRNC in the described service center;
Described service center is used to initiate a multi-media broadcasting service MBMS, sends session start instructions to described SRNC, and sets up transmission channel between the described SRNC, and utilize described transmission channel to send the MBMS business datum to described SRNC;
Described SRNC is used to receive the session start instructions from described service center, and sets up transmission channel between the described service center, and sets up the Iur synchronous bearer with target radio network controller DRNC in the professional corresponding service of the MBMS of the described initiation zone; Receive MBMS business datum from described service center by described transmission channel, the DRNC that passes through in the MBMS business corresponding service zone of the Iur synchronous bearer set up and described initiation carries out synchronously.
A kind of radio network controller (RNC), described RNC is service wireless network controller SRNC, comprising:
Memory cell is used to preserve different multi-media broadcasting service MBMS corresponding service area information separately;
The unit is set up in first reception, when being used to receive MBMS business of service center initiation, the session start instructions that sends to described SRNC only, according to described session start instructions, transmission channel between foundation and the described service center, and, know professional corresponding service area information with the MBMS of described initiation by the described memory cell of inquiry, set up the Iur synchronous bearer with target radio network controller DRNC in the described service area;
Second receives and to set up the unit, is used for by described transmission channel, receives the MBMS business datum from described service center, and utilizes the Iur synchronous bearer of described foundation, carries out synchronously with DRNC in the professional corresponding service of the MBMS zone of described initiation.
As seen, adopt technical scheme of the present invention, by service center and SRNC are configured, promptly, RNC in the network is configured to SRNC, with different MBMS business separately the corresponding service area information dispose to this SRNC, and only give service center with the information configuration of this SRNC, make in follow-up MBMS business datum transport process, no longer set up the transmission channel of service center to DRNC, only need set up service center gets final product to the transmission channel of SRNC, then the SRNC MBMS business datum that will be received from service center by and each DRNC between the Iur synchronous bearer set up send to each DRNC, and realization is synchronous between each DRNC, thereby has avoided the waste of bearing resource.
Description of drawings
Fig. 1 is existing MBMS Iur data synchronization process schematic diagram.
Fig. 2 is the existing pairing network architecture schematic diagram of MBMS Iur data synchronization process.
Fig. 3 sets up the process schematic diagram for existing MBMS Iur synchronous bearer.
Fig. 4 is existing MBMS Iur synchronous bearer dispose procedure schematic diagram.
Fig. 5 realizes the network architecture schematic diagram of the synchronous method correspondence between RNC for the present invention.
Fig. 6 realizes the flow chart of the synchronous method embodiment between RNC for the present invention.
Fig. 7 realizes the composition structural representation of the synchronous system embodiment between RNC for the present invention.
Fig. 8 is the composition structural representation of SRNC apparatus embodiments of the present invention.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in further detail.
At problems of the prior art, synchronous method between a kind of new realization RNC is proposed among the present invention, its corresponding network architecture is as shown in Figure 5.By service center and SRNC are configured, no longer as setting up the transmission channel of service center in the prior art to DRNC, only need set up service center gets final product to the transmission channel of SRNC, the SRNC MBMS business datum that will be received from service center sends to each DRNC by the Iur synchronous bearer of setting up between self and each DRNC then, thereby has avoided the waste of bearing resource.
The specific implementation of this method comprises: the RNC in the network is configured to SRNC, and with different MBMS business separately the corresponding service area information dispose to this SRNC, only give service center with the information configuration of this SRNC; Service center is initiated a MBMS business, sends session start instructions to this SRNC; After this SRNC receives session start instructions, and set up transmission channel between the service center, and set up the Iur synchronous bearer with DRNC in the professional corresponding service of this MBMS zone; Then, this SRNC passes through the transmission channel set up, receives the MBMS business datum from service center, and utilizes the Iur synchronous bearer set up and DRNC in this MBMS business corresponding service zone to carry out synchronously.
Below by specific embodiment, scheme of the present invention is described in further detail:
Fig. 6 realizes the flow chart of the synchronous method embodiment between RNC for the present invention.As shown in Figure 6, may further comprise the steps:
Step 601: the RNC in the network is configured to SRNC, and the professional corresponding service area information of different MBMS is disposed to this SRNC.
In this step, operator is configured to SRNC according to self needs with a certain RNC in the network.Such as, operator can pass through an operation interface, imports the address of a certain RNC, and specifying this RNC is SRNC.Simultaneously, operator is with the professional corresponding service area information of different MBMS, and the professional corresponding respectively DRNC information configuration of promptly different MBMS is given this SRNC.This SRNC can store these information in the mode that " MBMS Business Name ", " service area information " are tabulated one to one.
Certainly, above-mentioned configuration mode in actual applications, if adopt other mode to reach same purpose, also is fine only for illustrating.
Step 602: service center is initiated a MBMS business, and sends Session Start by core net and instruct SRNC.
In the existing scheme, operator can configure the professional corresponding service area information with different MBMS in advance in service center, so, when service center is initiated a MBMS business, can comprise that SRNC and DRNC send Session Start instruction to all RNC in the professional corresponding service of this MBMS zone; In the subsequent process, SRNC and DRNC are according to this Session Start instruction, the transmission channel between foundation and the service center.But in the scheme of the present invention, only the information of configuration SRNC in service center like this, when service center is initiated a MBMS business, will only send Session Start instruction to this SRNC.
Step 603:SRNC sets up transmission channel by core net and service center, and each DRNC in the professional corresponding service of this MBMS zone sends Iur synchronous bearer foundation request.
In this step, SRNC after receiving the Session Start instruction that service center sends by core net, by core net set up and service center between transmission channel, to be used to receive follow-up MBMS business datum from service center.The mode of setting up of transmission channel is known in this field, repeats no more.
In addition, carry information such as MBMS service identification during this Session Start instructs.Like this, after SRNC receives this Session Start instruction, can be according to the service area information list of the MBMS service identification inquiry of wherein carrying self storage, know professional corresponding service area information with this MBMS, and each DRNC in this service area sends Iur synchronous bearer foundation request, be MBMS Sync Bear SetupRequest message, set up the Iur synchronous bearer between request and each DRNC.The information such as cell ID that portability has unified resource assignment information, rlc/mac layer parameter and sends this MBMS business in this MBMS Sync Bear SetupRequest message.
Step 604: each DRNC sets up the information of carrying in the request according to the Iur synchronous bearer that receives and carries out this locality configuration, and sets up response to SRNC loopback Iur synchronous bearer.
In this step, each DRNC according to the information of wherein carrying, disposes local synchronous bearer resource after receiving MBMS Sync Bear Setup Request message, and to SRNC loopback Iur synchronous bearer foundation response, i.e. MBMS Sync Bear Setup Response message.Like this, promptly set up the Iur synchronous bearer between SRNC and the DRNC.
Need to prove, in step 603, SRNC also can not carry unified resource assignment information, rlc/mac layer parameter and send this professional information such as cell ID in the MBMS Sync BearSetup Request message that DRNC sends, but is carried out the configuration of above-mentioned information on SRNC and each DRNC respectively by operator.Certainly, step 603 is depicted as preferred mode.
Step 605:SRNC passes through the transmission channel set up and receives MBMS business datum from service center, and and each DRNC between utilize the Iur synchronous bearer of being set up to carry out synchronously.
The specific implementation of this step is identical with step 103~step 104 in the scheme shown in Figure 1, that is, after SRNC receives the MBMS business datum, carry out IUUP, GTP-U, PDCP and rlc layer protocol processes, and utilize the Iur synchronous bearer of being set up, send to each DRNC by Iur FP frame; Wherein, carry RLC PDU data, RLC PDU number and indicate each RLC PDU data to eat dishes without rice or wine to send the timestamp of the CFN zero hour in the Iur FP frame; Each DRNC sends to MAC_m entity in local each sub-district with the Iur FP frame that receives; MAC_m entity in local each sub-district determines that according to the timestamp information that carries in the IurFP frame the initial CFN of TTI that sends each RLC PDU data also sends constantly.
Based on said method, Fig. 7 realizes the composition structural representation of the synchronous system embodiment between RNC for the present invention.As shown in Figure 7, this system comprises: service center 701 and SRNC702; Preserve different MBMS business corresponding service area information separately among the SRNC702, only dispose the information of SRNC702 in the service center 701.Wherein:
Service center 701 is used to initiate a MBMS business, sends session start instructions to SRNC702, and and SRNC702 between set up transmission channel, utilize the transmission channel of being set up to send the MBMS business datum to SRNC702;
SRNC702 is used to receive the session start instructions from service center 701, and sets up transmission channel between the service center 701, and sets up the Iur synchronous bearer with DRNC in the professional corresponding service of this MBMS zone; Pass through the transmission channel set up and receive MBMS business datum, pass through the Iur synchronous bearer set up and carry out synchronously with DRNC in this MBMS business corresponding service zone from service center 701.
Fig. 8 is the composition structural representation of SRNC apparatus embodiments of the present invention.As shown in Figure 8, comprising:
Memory cell 801 is used to preserve different MBMS business corresponding service area information separately;
Unit 802 is set up in first reception, after being used to receive MBMS business of service center 701 initiations, the session start instructions that sends, according to described session start instructions, transmission channel between foundation and the service center 701, and by inquiry memory cell 801, know and the professional corresponding service area information of this MBMS, set up the Iur synchronous bearer with DRNC in this service area; Wherein, only dispose the information of equipment shown in Figure 8 in the service center 701;
Second receives and to set up unit 803, is used for passing through the transmission channel set up, receives the MBMS business datum from service center 701, and utilizes the Iur synchronous bearer of being set up, and carries out synchronously with DRNC in the professional corresponding service of this MBMS zone.
In a word, adopt technical scheme of the present invention, by service center and SRNC are configured, promptly, with different MBMS business separately the corresponding service area information dispose to SRNC, and only give service center with the information configuration of this SRNC, make in follow-up MBMS business datum transport process, no longer set up the transmission channel of service center to DRNC, only need set up service center gets final product to the transmission channel of SRNC, then the SRNC MBMS business datum that will be received from service center by and each DRNC between the Iur synchronous bearer set up send to each DRNC, and realize between each DRNC synchronously, thereby avoided the waste of bearing resource.
In sum, more than be preferred embodiment of the present invention only, be not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.