CN101047492B - Method and system for implementing synchronous RLC serial number between radio network controller - Google Patents
Method and system for implementing synchronous RLC serial number between radio network controller Download PDFInfo
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- CN101047492B CN101047492B CN2007100895469A CN200710089546A CN101047492B CN 101047492 B CN101047492 B CN 101047492B CN 2007100895469 A CN2007100895469 A CN 2007100895469A CN 200710089546 A CN200710089546 A CN 200710089546A CN 101047492 B CN101047492 B CN 101047492B
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Abstract
A method for realizing synchronization of RLC sequence number between radio network controllers includes obtaining the mapping relation of preset service data packet length to radio link control sub-plate number by signal source and holding space of control sequence number, confirming said control sub-plate number required by actual service data packet and distributing control sequence number for actual service data packet, fetching out initial radio link control sequence number labeled in actual service data packet and distributing said control sequence number to all said control sub-plates in actual service data packet according to preset sequence.
Description
Technical field
The present invention relates to the communications field, relate in particular to and realize Radio Link control sequence number method and system synchronous between radio network controller.
Background technology
Along with the fast development of Internet net, people no longer are satisfied with phone and messaging service to the demand of mobile communication, therefore, emerge a large amount of multimedia services.In some applied business, a plurality of users can receive identical data simultaneously, as video request program, television broadcasting, video conference, online education, interactive game or the like therein.MBMS (MultimediaBroadcast/Multicast Service, multimedia broadcasting and multicast) technology utilizes mobile network resource to propose for realizing most effectively, it is meant that a data source sends the point-to-multipoint service of data to a plurality of users, can realize that Internet resources are shared, comprise that mobile core network and access network resource are shared, especially interface-free resources.The MBMS of 3GPP definition can not only realize the classes of messages multicast and the broadcasting of plain text low rate, and can realize the multimedia service multicast and the broadcasting of two-forty, and this has complied with the development trend of following mobile data undoubtedly.
As the technology that improves the professional availability of frequency spectrum of MBMS, single frequency network (SFN) or chip-level merge (Chip merging) wireless signal that all adjacent base station synchronized transmissions of specification requirement are identical.Under the SFN pattern, UE (subscriber equipment) can be considered as multipath signal with the signal that comes from different base station, make public physic channel transmit broadcasting service and obtain bigger signal gain, thereby improve QoS (quality of service, the service quality) performance of MBMS business.Yet the introducing of this technology also brings new problem simultaneously: promptly, be considered as multipath from the signal of different base station by UE, this just requires 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 by the multi-plot joint detection technique, and the MBMS service signal that this different districts that also requires UE to receive sends is the same at same time slot.After 3GPP introduces MBMS, variation has taken place in the protocol stack of user's face, RNC (radio network controller, radio network controller) can be when the MBMS service carrier is set up according to core net SA (Service Area, the coverage) tabulation, 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, hereinafter to be referred as PDCP) and Radio Link control (radio link control, hereinafter to be referred as RLC) entity, medium access control (the medium access control for MBMS of MBMS is separately used in each sub-district, hereinafter to be referred as MAC-m) and Frame Protocol separately (frame protocol is hereinafter to be referred as FP).Wherein RLC uses Unacknowledged Mode (UM pattern).
In addition, the MBMS business is the service towards the whole network, and same MBMS business may be based upon on the different RNC.Like this, the UE receiving gain is improved in order to utilize SFN or Chip folding in the sub-district between different RNCs, needs the MBMS business identical with the sub-district synchronized transmission of the adjacent R NC signal of eating dishes without rice or wine; Otherwise, belong to that signal can cause co-channel interference between the neighbor cell of different RNCs, perhaps UE can not get receiving gain.
Realizing that RLC belongs to the sub-district of the minizone of different RNC can the identical signal of eating dishes without rice or wine of synchronized transmission, need to guarantee the consistency of business datum and agreement control packet header content, this just requires different RNC when realizing that RLC handles, guarantee that the RLC sequence number is synchronous, promptly, to identical business data packet, the identical RLC sequence number of mark.
Realize in the scheme synchronous between the professional RNC of MBMS at a kind of core net mark timestamp that uses, consider the possibility of Network Packet Loss, time-delay, if certain RNC does not receive business data packet in the time that requires, and other RNC has received this packet in the time that requires, according to the processing mode of existing protocol, the RLC sequence number that different RNCs is distributed will occur inconsistent.Such as, the RLC sequence number that the RNC distribution of packet loss occurs will lag behind the RNC that does not have packet loss.The difference of RLC sequence number can cause professional relevant wireless signal difference of the same moment, thereby makes that wireless signal is asynchronous between RNC.
Summary of the invention
Problem at the prior art existence, the purpose of this invention is to provide a kind of Radio Link control sequence number method and system synchronous between radio network controller of in the MBMS system business, realizing, even the present invention under packet drop, can guarantee also that the sequence number of industry packet is synchronous between RNC.
According to an aspect of the present invention, a kind of Radio Link control sequence number method synchronous between radio network controller that realizes may further comprise the steps: step S102, information source obtain preset the business datum packet length and with the mapping relations of the burst number of the wireless chain control layer of corresponding radio network controller, and be that each Business Stream keeps Radio Link control sequence space; Step S104, information source is according to presetting Radio Link control burst number that business datum packet length and mapping relations determine that the actual traffic data bag is required and being be responsible for assigning continuous Radio Link control sequence number of actual traffic data, first Radio Link control sequence of mark number in the actual traffic data bag, and the actual traffic data bag transferred to radio network controller; And step S106, radio network controller receives and reads first Radio Link control sequence number in the actual traffic data bag, and is that all Radio Links control bursts of actual traffic data bag distribute Radio Link control sequences number according to predefined procedure.
According to a further aspect in the invention, a kind of Radio Link control sequence number system synchronous between radio network controller that realizes comprises: the sequence number labelling apparatus, be positioned at the information source place of core net, be used to obtain preset the business datum packet length and with the mapping relations of the burst number of the wireless chain control layer of corresponding radio network controller, determine the required Radio Link of actual traffic data bag control burst number and be responsible for assigning continuous Radio Link control sequence number of actual traffic data, and in the actual traffic data bag first Radio Link control sequence of mark number, and the actual traffic data bag transferred to radio network controller; And serial number assignment device, be positioned at the radio network controller place, be used for receiving and read first Radio Link control sequence number of actual traffic data bag, and be that the burst of all wireless chain control layers of actual traffic data bag distributes Radio Link control sequence number according to predefined procedure.
Wherein, the sequence number labelling apparatus comprises: the space maintenance unit, be used to obtain and preset the business datum packet length, and the mapping relations that preset business datum packet length and the burst number of the wireless chain control layer of corresponding radio network controller, and safeguard Radio Link control sequence space for each Business Stream; And indexing unit, be used for first Radio Link control sequence of being distributed number at actual traffic data bag mark.
Wherein, the serial number assignment device comprises: the sequence number acquiring unit is used for receiving and read first Radio Link control sequence number of actual traffic data bag; And the serial number assignment unit, being used for according to predefined procedure is that the burst of all wireless chain control layers of actual traffic data bag distributes Radio Link control sequence number.
In said method and system, in processing procedure, exist under the situation of the service data unit that does not fill up at wireless chain control layer, radio network controller fills up burst; Under the situation that service data unit does not fill up, radio network controller does not carry out the wireless chain control layer serial connection to be handled.
Wherein, information source can be core net node or service node, and this method and system can be applied to multimedia broadcast/multicast system.
The invention provides a kind of Radio Link control sequence number method and system synchronous between radio network controller of in the multimedia broadcast/multicast system business of wireless communication system, realizing.In the present invention, because the rlc layer sequence number distribute to be specified by core net, even certain data-bag lost can guarantee that also each business datum wraps in the consistency of the sequence number behind the RNC layer burst.
Description of drawings
Shuo Ming accompanying drawing is used to provide further understanding of the present invention herein, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute to improper qualification of the present invention, in the accompanying drawings:
Fig. 1 is the realization Radio Link control sequence number method flow diagram synchronous between radio network controller in the MBMS system business according to the embodiment of the invention; And
Fig. 2 is the block diagram of realizing the system that the Radio Link control sequence is number synchronous between radio network controller in the MBMS system business according to the embodiment of the invention.
Embodiment
Below in conjunction with corresponding accompanying drawing and specific embodiment the Radio Link control sequence number method and system synchronous between radio network controller that realize in the MBMS system business of the present invention are described in detail.
Fig. 1 is the realization Radio Link control sequence number method flow diagram synchronous between radio network controller in the MBMS system business according to the embodiment of the invention, as shown in Figure 1, in step S102, information source by configuration or signaling method obtain preset the business datum packet length and with the mapping relations of the burst number of the wireless chain control layer of corresponding radio network controller, and be each Business Stream reservation Radio Link control sequence space.Wherein, preset the business datum packet length, be meant protocol definition, need send to the total length of UE according to MBMS.
In step S104, information source is calculated the burst number of the wireless chain control layer of actual traffic data bag needs distribution according to configuration, and distribute to the continuous RLC sequence number of the required number of this actual traffic data bag, and first RLC sequence number that mark distributed in the actual traffic data bag, and the keep the score initial RLC sequence number of sheet of the mark actual traffic data bag acceptance of the bid that will transfer to radio network controller.
In step S106, radio network controller receives the actual traffic data bag of going up transmission in the step, and carry out the burst of rlc layer, and read the initial RLC sequence number in the actual traffic data bag, and be that all RLC bursts of business data packet distribute RLC sequence numbers according to predefined procedure.
Wherein, exist under the situation of the service data unit that does not fill up in the processing procedure of rlc layer, the RLC device fills up these service data units; Under the situation that service data unit does not fill up, the RLC device does not carry out the wireless chain control layer serial connection to be handled.Wherein, information source can be any one core net node or service node.
Fig. 2 is the block diagram of realizing the system that the Radio Link control sequence is number synchronous between radio network controller in media broadcast multi-cast system business according to the embodiment of the invention, as shown in Figure 2, realization Radio Link control sequence of the present invention number system synchronous between radio network controller comprises: sequence number labelling apparatus 202, be positioned at the information source place of core net, be used to obtain preset the business datum packet length and with the mapping relations of the burst number of the wireless chain control layer of corresponding radio network controller, and safeguard Radio Link control sequence space for each Business Stream, determine the required Radio Link of actual traffic data bag control burst number and be responsible for assigning continuous Radio Link control sequence number of actual traffic data according to presetting business datum packet length and mapping relations, and remember beginning Radio Link control sequence number, and the actual traffic data bag is transferred to radio network controller in actual traffic data bag acceptance of the bid; And serial number assignment device 204, be positioned at the radio network controller place, be used for receiving and read the initial Radio Link control sequence number of actual traffic data bag, and be that the burst of all wireless chain control layers of actual traffic data bag distributes Radio Link control sequence number according to predefined procedure.
Wherein, sequence number labelling apparatus 202 comprises: space maintenance unit 2022, be used for according to preset the business datum packet length and with the mapping relations of the burst number of the wireless chain control layer of corresponding radio network controller, determine Radio Link control burst number that the actual traffic data bag is required and be responsible for assigning continuous Radio Link control sequence number of actual traffic data; And indexing unit 2024, be used for first Radio Link control sequence of being distributed number at actual traffic data bag mark.
Wherein, serial number assignment device 204 comprises: sequence number acquiring unit 2042 is used for receiving and read the initial Radio Link control sequence number that presets business data packet; And serial number assignment unit 2044, being used for according to predefined procedure is that the burst of all wireless chain control layers of actual traffic data bag distributes Radio Link control sequence number.
Wherein, exist under the situation of the service data unit that does not fill up in the processing procedure of wireless chain control layer, radio network controller fills up this service data unit; Under the situation that service data unit does not fill up, radio network controller does not carry out the wireless chain control layer serial connection to be handled.Wherein, information source can be core net node or service node, and this system can be applied to multimedia broadcast/multicast system.
In this scheme, the rlc layer sequence number distribute to be specified by core net, can guarantee that the sequence number that each business datum wraps in behind the RNC layer burst is consistent, even certain data-bag lost can not cause the RLC sequence number between RNC inconsistent yet.
Below by specific embodiment technical scheme of the present invention is illustrated in further detail.
At first, information source configuration data bag output length is two kinds of 100 bytes and 200 bytes.Wherein, the corresponding RLC burst of 100 bytes, corresponding two the RLC bursts of 200 byte lengths.Secondly, the current RLC sequence number of information source maintenance is 10.Then, the packet of one 180 byte of information source output, this packet can be divided into 2 RLC bursts, and like this, first sequence number of this packet of information source burst is 2, and the RLC sequence number of its maintenance is revised as 10+2=12.Once more, information source first RLC sequence number of flag data bag in packet is 10.At last, after RNC receives this packet, carry out burst, the serial number assignment of first burst is that 10, the second serial number assignment are 11, because two RLC bursts can hold 200 bytes, handles so second burst remaining space done to fill.
Those skilled in the art will readily understand additional advantages and modifications of the present invention.Therefore, above-mentioned at embodiment be described as the concrete Application Example of the present invention, the present invention aspect widely is not limited to the specific detail and the exemplary embodiments that illustrate and describe herein.Therefore, can under the condition that does not break away from by claim and the spirit or scope of the present invention that equivalent limited thereof, make various modifications.
Claims (12)
1. realize Radio Link control sequence number method synchronous between radio network controller for one kind, it is characterized in that, said method comprising the steps of:
Step S102, information source obtain preset the business datum packet length and with the mapping relations of the burst number of the wireless chain control layer of corresponding radio network controller, and be that each Business Stream keeps Radio Link control sequence space;
Step S104, described information source presets Radio Link control burst number that business datum packet length and described mapping relations determine that the actual traffic data bag is required and is be responsible for assigning continuous Radio Link control sequence number of described actual traffic data according to described, remember beginning Radio Link control sequence number in the acceptance of the bid of described actual traffic data bag, and described actual traffic data bag is transferred to described radio network controller; And
Step S106, described radio network controller receives and reads the initial Radio Link control sequence number in the described actual traffic data bag, and is that all Radio Links control bursts of described actual traffic data bag distribute Radio Link control sequences number according to predefined procedure.
2. method according to claim 1 is characterized in that, in the processing procedure of described wireless chain control layer, exists under the situation of the service data unit that does not fill up, and fills up described service data unit.
3. method according to claim 2 is characterized in that, under the situation that described service data unit does not fill up, described radio network controller does not carry out the wireless chain control layer serial connection to be handled.
4. method according to claim 1 is characterized in that, described information source is core net node or service node.
5. according to each described method in the claim 1 to 4, it is characterized in that described method is used for multimedia broadcast/multicast system.
6. realize Radio Link control sequence number system synchronous between radio network controller for one kind, it is characterized in that comprising:
The sequence number labelling apparatus, be positioned at the information source place of core net, be used for according to preset the business datum packet length and with the mapping relations of the burst number of the wireless chain control layer of corresponding radio network controller, determine the required Radio Link of actual traffic data bag control burst number and be responsible for assigning continuous Radio Link control sequence number of described actual traffic data, and remember beginning Radio Link control sequence number, and described actual traffic data bag is transferred to described radio network controller in the acceptance of the bid of described actual traffic data bag; And
The serial number assignment device, be positioned at described radio network controller place, be used for receiving and read the initial Radio Link control sequence number of described actual traffic data bag, and be that the burst of all wireless chain control layers of described actual traffic data bag distributes Radio Link control sequence number according to predefined procedure.
7. system according to claim 6 is characterized in that, described sequence number labelling apparatus comprises:
The space maintenance unit, be used to obtain the described business datum packet length that presets, and the described mapping relations that preset business datum packet length and the burst number of the wireless chain control layer of corresponding radio network controller, and safeguard Radio Link control sequence space for each Business Stream; And
Indexing unit is used for remembering beginning Radio Link control sequence number in the acceptance of the bid of described actual traffic data bag.
8. system according to claim 7 is characterized in that, described serial number assignment device comprises:
The sequence number acquiring unit is used for receiving and read the initial Radio Link control sequence number of described actual traffic data bag; And
The serial number assignment unit, being used for according to predefined procedure is that the burst of all wireless chain control layers of described actual traffic data bag distributes Radio Link control sequence number.
9. according to claim 7 or 8 described systems, it is characterized in that in the processing procedure of described wireless chain control layer, exist under the situation of the service data unit that does not fill up, described radio network controller fills up described service data unit.
10. system according to claim 9 is characterized in that, under the situation that described service data unit does not fill up, described radio network controller does not carry out the wireless chain control layer serial connection to be handled.
11. system according to claim 10 is characterized in that, described information source is core net node or service node.
12. system according to claim 11 is characterized in that, described system is used for multimedia broadcast/multicast system.
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| CN2007100895469A CN101047492B (en) | 2007-03-29 | 2007-03-29 | Method and system for implementing synchronous RLC serial number between radio network controller |
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| CN101651536A (en) * | 2008-08-13 | 2010-02-17 | 中兴通讯股份有限公司 | Method and system for realizing synchronization of control sequence numbers |
| CN101651510B (en) | 2008-08-14 | 2013-01-16 | 中兴通讯股份有限公司 | Method and device for recovery processing in service data synchronous transmission |
| CN101686431B (en) * | 2008-09-22 | 2012-07-18 | 中兴通讯股份有限公司 | Synchronous processing method and device |
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