CN101500193B - Method for multimedia broadcast multicast service data synchronization between RNCs - Google Patents
Method for multimedia broadcast multicast service data synchronization between RNCs Download PDFInfo
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- CN101500193B CN101500193B CN2008100068475A CN200810006847A CN101500193B CN 101500193 B CN101500193 B CN 101500193B CN 2008100068475 A CN2008100068475 A CN 2008100068475A CN 200810006847 A CN200810006847 A CN 200810006847A CN 101500193 B CN101500193 B CN 101500193B
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Abstract
The invention discloses a method for synchronizing the data of the multimedia broadcast and multicast service among radio network controllers, wherein, a primary radio network controller transmits FP frames to at least one secondary radio network controllers by Iur interfaces and the FP frames carry service data and one or a plurality of timestamps processed by a radio link control layer protocol; and after receiving the FP frames, the secondary radio network controller determines a starting connection frame number of the service data to be transmitted according to the timestamps. By arranging a serving radio network controller (SRNC) and a drift radio network controller (DRNC) and leading the serving radio network controller (SRNC) to uniformly form the FP frames and the FP frames to carry the same timestamps which are then transmitted to the drift radio network controller (DRNC), the method for synchronizing the data of the multimedia broadcast and multicast service among the radio network controllers realizes the MBMS data synchronization among the radio network controllers (RNC).
Description
Technical field
The present invention relates to wireless communication technology field; Particularly; Relate to multimedia broadcast-multicast service (Multimedia Broadcast/Multicast Service abbreviates MBMS as) synchronization of data method between radio network controller (Radio Network Controller abbreviates RNC as).
Background technology
Along with the Internet rapid network development, people no longer content just to phone and messaging service to the demand of mobile communication, meanwhile, a large amount of multimedia services also occurred.For some applied business wherein, a plurality of users can receive identical data simultaneously, like video request program, television broadcasting, video conference, online education, interactive game etc.
In order to realize utilizing most effectively mobile network resource, MBMS (Multimedia Broadcast/Multicast Service, multi-medium broadcast/group broadcast service) technology has appearred.MBMS is meant that a data source sends the point-to-multipoint service of data to a plurality of users, and it has realized that Internet resources share, and comprises especially interface-free resources shared of mobile core network and access network resource.
3GPP (3rd Generation Partnership Project; Third generation partner program) MBMS of definition can not only realize the classes of messages multicast and the broadcasting of plain text low rate; And can also realize the multimedia service multicast and the broadcasting of two-forty, this has complied with following mobile data Development Trend undoubtedly.
As the technology that improves the professional availability of frequency spectrum of MBMS, SFN (SingleFrequency Network abbreviates SFN as) or Chip merge (chip-level merging) wireless signal that all adjacent base station synchronized transmissions of specification requirement are identical.
Under the SFN pattern; Subscriber equipment (User Equipment; Abbreviate UE as) can the signal from different base station be regarded as multipath signal; Make public physic channel transmit broadcasting service and obtain bigger signal gain, thereby improved professional QoS (Quality of Service, the service quality) performance of MBMS.But the introducing of this technology has also brought new problem, that is, if be regarded as multipath from the signal of different base station by UE, then require each footpath data must keep synchronized transmission.Under the Chip merging patterns, UE receives the service signal that different base station sends simultaneously, and realizes merging at chip-level through the multi-plot joint detection technique.The MBMS service signal that this different districts that all requires UE to receive sends all is the same at same time slot.
After 3GPP introduces MBMS; Variation has taken place in the protocol stack of user plane; Radio network controller (Radio Network Controller abbreviates RNC as) can be tabulated according to core net coverage (Service Area abbreviates SA as) when the MBMS service carrier is set up; Be made into the cell set mode with affiliated cell set and set up shared PDCP (the Packet Data Convergence Protocol in a plurality of sub-districts; PDCP) and RLC (Radio Link Control, Radio Link control) entity, MAC-m (Medium Access Control for MBMS is separately used in each sub-district; The medium access control of MBMS) and FP separately (Frame Protocol, Frame Protocol).
The MBMS business is the service towards the whole network, and same MBMS business possibly be based upon on the different RNCs.Like this; The UE receiving gain is improved in order to utilize SFN or Chip folding in sub-district between different RNCs; Need and the identical MBMS business of cell synchronizing transmission of the adjacent R NC signal of eating dishes without rice or wine; Otherwise, belong to that signal can cause with disturbing frequently between the neighbor cell of different RNCs, perhaps UE can not get receiving gain.
Because the mode of different RNCs processing service data and parameter is different; And consider that network congestion causes the delay of the business datum that RNC receives even the possibility of losing; The minizone that guarantees to belong to different RNCs can the identical signal of eating dishes without rice or wine of synchronized transmission, just needs harmonious assurance the between RNC.
In a kind of synchronous method that realizes through the Iur interface between RNC between the professional RNC of MBMS, DRNC (from RNC) and SRNC (main RNC) be through sharing the MAC-m layer data block of SRNC, and specify the timestamp that sends shared MAC-m data block to realize synchronously.In said process, owing to need the SRNC side to handle the MAC layer, therefore need SRNC that each DRNC is increased the MAC_m protocol layer entity, increased processing expenditure.
Summary of the invention
Consider that the MAC-m layer data block of passing through DRNC and the shared SRNC of SRNC that exists in the correlation technique realizes that the bigger problem of expense that exists in the professional synchronous method of MBMS proposes the present invention; For this reason; The present invention aims to provide the method for synchronous of multimedia broadcast and multicast service data between a kind of radio network controller; Than correlation technique, it can realize the synchronous of MBMS business with less expense.
According to the present invention, the method for synchronous of multimedia broadcast and multicast service data between a kind of radio network controller is provided, be used to realize primary wireless network controller and at least one from the multimedia broadcast multicast data between radio network controller synchronously.
Method for synchronous according to multimedia broadcast and multicast service data between the radio network controller of the embodiment of the invention can comprise following processing: the primary wireless network controller sends FP frame at least one from radio network controller through the Iur interface, and in the FP frame, carries business datum and one or more timestamp through the wireless chain control layer protocol processes; Receive the FP frame, confirm to send the initial Connection Frame Number of business datum from radio network controller according to timestamp.
The business datum of wherein, carrying in the above-mentioned FP frame all wireless link control protocol data cells for need in same Transmission Time Interval, sending.At this moment, carry a timestamp in the FP frame.
The one or more wireless link control protocol data cells of the business datum of perhaps, carrying in the above-mentioned FP frame for not needing all in same Transmission Time Interval, to send.At this moment, carry a plurality of timestamps in the FP frame, the wireless link control protocol data cell that need in same Transmission Time Interval, send in above-mentioned one or more wireless link control protocol data cells is corresponding to stabbing at the same time.
Wherein, above-mentioned wireless link control protocol data cell is Radio Link control transparent mode protocol Data Unit or Radio Link control non-conformation mode protocol data unit.
Wherein, each above-mentioned wireless link control protocol data cell is all corresponding to a sequence number.Based on this, after receiving the FP frame, further comprise following processing: according to sequence number all wireless link control protocol data cells that business datum comprises are sorted from radio network controller.
Wherein, above-mentioned timestamp representes to send the initial Connection Frame Number or the starter system frame number of business datum.Represent at timestamp under the situation of starter system frame number, confirm that the operation of initial Connection Frame Number is specially: initial Connection Frame Number=starter system frame number mod 256.
Preferably, carry the transformat indication information in the above-mentioned FP frame, the transformat indication information is used to indicate the employed transformat of service data transmission.Further preferably; Carry length information in the FP frame; Above-mentioned length information is used to indicate the size of wireless link control protocol data cell, can also carry number information, and above-mentioned number information is used to indicate the number of the wireless link control protocol data cell that business data packet draws together.
In said method, before sending the FP frame, also comprise following processing: the primary wireless network controller receives the multimedia broadcast and multicast service data bag that core net is sent; The multimedia broadcast and multicast service data bag is carried out the wireless chain control layer protocol processes, the business datum after obtaining handling.
As stated, in the present invention, SRNC is unified to be formed the FP frame and in this frame, carries the business datum and identical timestamp that RLC handles through making; Through the mode of transmitting the FP frame is sent to DRNC then; The MBMS data sync between RNC can be realized,, expense can be reduced than correlation technique; And then can obtain bigger signal gain, and can improve professional Qos (service quality) performance of MBMS so that public physic channel transmits broadcasting service.
Other features and advantages of the present invention will be set forth in specification subsequently, and, partly from specification, become obvious, perhaps understand through embodiment of the present invention.The object of the invention can be realized through the structure that in the specification of being write, claims and accompanying drawing, is particularly pointed out and obtained with other advantages.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used to explain the present invention with embodiments of the invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the networking sketch map that the Iur interface is realized synchronized transmission between the professional RNC of MBMS that passes through according to correlation technique;
Fig. 2 is the flow chart according to the method for synchronous of MBMS business datum between the RNC of the embodiment of the invention;
Fig. 3 is according to the FP frame structure sketch map in the method for synchronous of MBMS business datum between the RNC of the embodiment of the invention;
Fig. 4 is the sketch map that the user entity annexation between part RNC in the system shown in Figure 1 is shown;
Fig. 5 is the flow chart according to the realization instance of the method for synchronous of MBMS business datum between the RNC of the embodiment of the invention.
Embodiment
As stated, realize that in the MAC-m layer data block of passing through shared SRNC that adopts at present the SRNC side need be handled the MAC layer in the synchronous method between the professional RNC of MBMS; Therefore need SRNC that each DRNC is increased the MAC_m protocol layer entity, increased processing expenditure, in addition; From protocol hierarchy; MAC_m belongs to each sub-district, at SRNC the MAC of DRNC is handled, and does not meet the functional definition to MAC_m.Comparatively speaking; If realize the MBMS service synchronization through sharing the rlc layer data block; Then considering from the protocol hierarchy angle can be more reasonable; Share between RNC and just used for reference the mode of sharing RLC in the RNC, sharing to rlc layer in the RNC also is the 3GPP protocol definition, therefore less as far as SRNC side processing expenditure.
Given this, the embodiment of the invention provides the method for synchronous of MBMS business datum between a kind of RNC, is used for through sharing the rlc layer data block of SRNC, realizes main RNC and at least one synchronous from the MBMS business datum between RNC.
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for explanation and explains the present invention, and be not used in qualification the present invention.
At first, continue with reference to Fig. 1, Fig. 1 can be used as the preferred network environment of enforcement according to the method for synchronous of MBMS business datum between the RNC of the embodiment of the invention.As shown in Figure 1, need set up the professional RNC of same MBMS with one group and form the RNC group, one of them RNC is set to SRNC (main SRNC can be called for short main_RNC below), and other RNC is set to DRNC (from RNC, can be called for short sub_RNC below).Usually, SRNC is one, and DRNC then can be a plurality of, is at least one, and the situation of two (DRNC1 and DRNCn) has been shown among Fig. 1.
Next with reference to Fig. 2, Fig. 2 is the flow chart that illustrates according to the method for synchronous of MBMS business datum between the RNC of the embodiment of the invention.As shown in Figure 2, can comprise following processing according to the method for synchronous of MBMS business datum between the RNC of the embodiment of the invention:
Step S202, main RNC sends FP frame at least one from RNC through the Iur interface, and in the FP frame, carries business datum and one or more timestamp through wireless chain control layer (Radio Link Control abbreviates RLC as) protocol processes;
Step S204 receives the FP frame, confirms to send the initial Connection Frame Number of business datum according to timestamp from RNC.
Wherein, before step S202, that is, before sending the FP frame, main RNC will receive the MBMS business data packet that core net (Core Network abbreviates CN as) is sent, and the MBMS business data packet is carried out the rlc layer protocol processes, the business datum after obtaining handling.
Below will further describe other details according to the method for synchronous of MBMS business datum between the RNC of the embodiment of the invention.
At first; The business datum of carrying in the above-mentioned FP frame can be all wireless link control protocol data cells (Radio Link Control Protocol DataUnit abbreviates RLC PDU as) of needs transmission in same Transmission Time Interval (Transmission Time Interval abbreviates TTI as); At this moment; Carry a timestamp in the FP frame, that is, RLC PDU all among the FP are corresponding to this timestamp.
Perhaps; The business datum of carrying in the above-mentioned FP frame also can be not need one or more RLC PDU (or being called RLC PDU data block) of all in same TTI, sending; At this moment; Can carry a plurality of timestamps in the FP frame, the RLC PDU that need in same TTI, send among above-mentioned one or more RLCPDU corresponds respectively at the same time and stabs.
For RLC PDU above-mentioned, it can be RLC transparent mode protocol Data Unit (TMD PDU), also can be RLC non-conformation mode protocol data unit (UMDPDU).
Preferably, each top RLC PDU is corresponding to a sequence number.Based on this, after receiving the FP frame, in step S204, may further include following processing: according to sequence number all RLC PDU that business datum comprises are sorted from RNC.
For timestamp above-mentioned, it can represent to send the initial Connection Frame Number (Connection Frame Number abbreviates CFN as) or the starter system frame number (System Frame Number abbreviates SFN as) of business datum.
Wherein, represent at timestamp under the situation of initial SFN, in step S204, confirm that the operation of initial CFN is specially: CFN=SFN mod 256.
Preferably, can also carry following information in the above-mentioned FP frame: transformat indication information (Transmission Format Indicator abbreviates TFI as) is used to indicate the employed transformat of service data transmission; Length information is used to indicate the size of wireless link control protocol data cell; Number information is used to indicate the number of the RLC PDU that business data packet draws together.Through in the FP frame, carrying above-mentioned information, can guarantee MBMS synchronizing traffic data realization process better.
Wherein, Fig. 3 has provided the structure example of the FP frame that uses in the embodiment of the invention.As shown in Figure 3, this FP frame comprise FP frame head, a timestamp (CFN), transformat indication (TFI), RLC PDU data block length, RLC PDU data block number, RLCPDU data block-1 ..., RLC PDU data block-n, and FP postamble.In this structure, RLC PDU data block-1 ..., RLC PDU data block-n is all corresponding to timestamp (CFN).Should be appreciated that this structure example only is exemplary, purpose is to provide to further understanding of the present invention, according to need of practice, the structure of FP frame can be set neatly according to the technical characterictic of describing in the embodiment of the invention, and the present invention is not limited in this respect.
Instance
Fig. 4 further shows the annexation of user entity between the part RNC of system shown in Figure 1.As shown in Figure 4; In MBMS business data transmission process; Main_RNC comprises following entity: share MBMS PDCH (Packet Data Channel; Packet Data Channel) entity, share MBMS RLC entity, for its subordinate need set up the professional cell setting of MBMS the MAC_m entity, with the FP entity of its subordinate sub-district MAC_m entity relationship, with the Iur FP entity that sub_RNC interrelates, this Iur FP entity is used for transmitting the FP frame through the Iur interface between RNC.
Provided concrete realization instance of the present invention below in conjunction with Fig. 5.Fig. 5 shows the realization flow of this instance, and is as shown in Figure 5, comprises following processing:
501:main_RNC receives the MBMS business data packet that core net is sent;
502: accomplish IUUP, GTPU (GPRS Tunnel Protocol User, GPRS Tunnel Protocol-user plane), PDCP (Packet Data Convergence Protocol, PDCP), rlc layer protocol processes;
503: form the FP frame, in this FP frame, carry timestamp CFN, the value of CFN has been specified the delivery time of these frame data, in this FP frame, carries all RLC PDU that send in the same TTI, and carries the transformat indication TFI that sends these RLC PDU;
504:main_RNC transmits this FP frame to each sub_RNC successively through Iur FP; Simultaneously, also be forwarded to this FP frame the Node B place of its affiliated subdistrict;
505: inner at sub_RNC; From the FP frame that receives, read RLC PDU, handle, form Iub FACH FP frame through the MAC_m protocol layer from main_RNC; And, confirm to send the CFN of IubFACH FP frame according to the timestamp that MBMS Iut synchronous bearer FP frame carries;
After the Node B at place, 506:sub_RNC subordinate sub-district receives Iub FACH FP frame, confirm the delivery time of these frame data according to the CFN of FP frame appointment.
Through also combining above description with reference to Fig. 2; Can understand like this, that is, main_RNC is regarded as sub_RNC own subordinate's a sub-district; Pattern for a plurality of RNC multiple operations of the prior art; After the method that the application embodiment of the invention provides, be appreciated that to single RNC (main_RNC) sends the mode of operation of MBMS business datum to the sub-district under own, thereby can realize synchronously.
As stated; The technical scheme that provides by means of the embodiment of the invention, through SRNC and DRNC are set, and SRNC is unified to be formed the FP frame and in this frame, carries the business datum and identical timestamp that RLC handles through making; Through the mode of transmitting the FP frame is sent to DRNC then; MBMS data sync between RNC can be realized,, expense can be reduced than correlation technique; And then can obtain bigger signal gain, and can improve professional QoS (service quality) performance of MBMS so that public physic channel transmits broadcasting service.That is, the present invention can make each RNC of original separate operation under the coordination of SRNC, constitute with sole user's face handle, unified time stabs the synchronizing characteristics that is basis, thereby realize synchronous between RNC.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. the method for synchronous of multimedia broadcast and multicast service data between a radio network controller; Be used to realize primary wireless network controller and at least one from the multimedia broadcast multicast data between radio network controller synchronously; It is characterized in that; Said method comprises: said primary wireless network controller through the Iur interface to said at least one be the FP frame from radio network controller transmit frame protocol frame; And in said FP frame, carry business datum and one or more timestamp through the wireless chain control layer protocol processes, wherein, said business datum is a wireless link control protocol data cell;
Receive said FP frame, the said initial Connection Frame Number of confirming to send said business datum from radio network controller according to said timestamp.
2. method according to claim 1 is characterized in that, the said business datum of carrying in the said FP frame all wireless link control protocol data cells for need in same Transmission Time Interval, sending.
3. method according to claim 2 is characterized in that, carries a timestamp in the said FP frame.
4. method according to claim 1 is characterized in that, the one or more wireless link control protocol data cells of the said business datum of carrying in the said FP frame for not needing all in same Transmission Time Interval, to send.
5. method according to claim 4; It is characterized in that; Carry a plurality of timestamps in the said FP frame, the wireless link control protocol data cell that need in same Transmission Time Interval, send in said one or more wireless link control protocol data cells is corresponding to stabbing at the same time.
6. according to claim 2 or 4 described methods, it is characterized in that said wireless link control protocol data cell is Radio Link control transparent mode protocol Data Unit or Radio Link control non-conformation mode protocol data unit.
7. according to claim 2 or 4 described methods, it is characterized in that each said wireless link control protocol data cell is all corresponding to a sequence number.
8. method according to claim 7 is characterized in that, after receiving said FP frame, further comprises following processing:
Saidly according to said sequence number all wireless link control protocol data cells that said business datum comprises are sorted from radio network controller.
9. method according to claim 1 is characterized in that, said timestamp representes to send the initial Connection Frame Number or the starter system frame number of said business datum.
10. method according to claim 9 is characterized in that, representes at said timestamp under the situation of said starter system frame number, confirms that the operation of said initial Connection Frame Number is specially:
Said initial Connection Frame Number=said starter system frame number mod 256.
11., it is characterized in that according to each described method in the claim 1 to 5, carry the transformat indication information in the said FP frame, said transformat indication information is used for the employed transformat of the indication said business datum of transmission.
12., it is characterized in that carry length information in the said FP frame, said length information is used to indicate the size of said wireless link control protocol data cell according to each described method in the claim 1 to 5.
13., it is characterized in that according to each described method in the claim 1 to 5, carry number information in the said FP frame, said number information is used to indicate the number of the wireless link control protocol data cell that said business datum comprises.
14. according to each described method in the claim 1 to 5, it is characterized in that, before sending said FP frame, also comprise following processing:
Said primary wireless network controller receives the multimedia broadcast and multicast service data bag that core net is sent;
Said multimedia broadcast and multicast service data bag is carried out the wireless chain control layer protocol processes, the said business datum after obtaining handling.
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| CN101605041B (en) * | 2008-09-18 | 2011-04-06 | 华为技术有限公司 | Method, device and system for configuring multicast unifrequent network sources |
| CN102014339A (en) * | 2009-10-27 | 2011-04-13 | 大唐移动通信设备有限公司 | Method, device and system for configuring multimedia broadcast multicast service (MBMS) synchronization |
| CN103533630B (en) * | 2012-07-02 | 2016-09-28 | 华为技术有限公司 | Eat dishes without rice or wine method for synchronizing time and system, wireless device, radio equipment controller |
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| CN1918812A (en) * | 2004-02-11 | 2007-02-21 | 艾利森电话股份有限公司 | Radio access node registration for multimedia broadcast multicast service |
| CN101043641A (en) * | 2007-03-07 | 2007-09-26 | 中兴通讯股份有限公司 | Inter-RNC MBMS data synchronization method and system |
| CN101043653A (en) * | 2007-03-27 | 2007-09-26 | 中兴通讯股份有限公司 | Method for realizing transparent mode based inter-wireless network controller MBMS service synchronization |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1918812A (en) * | 2004-02-11 | 2007-02-21 | 艾利森电话股份有限公司 | Radio access node registration for multimedia broadcast multicast service |
| CN101043641A (en) * | 2007-03-07 | 2007-09-26 | 中兴通讯股份有限公司 | Inter-RNC MBMS data synchronization method and system |
| CN101043653A (en) * | 2007-03-27 | 2007-09-26 | 中兴通讯股份有限公司 | Method for realizing transparent mode based inter-wireless network controller MBMS service synchronization |
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