CN103001748A - Method and device for retransmitting data and processing retransmitted data - Google Patents
Method and device for retransmitting data and processing retransmitted data Download PDFInfo
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- CN103001748A CN103001748A CN2012105717420A CN201210571742A CN103001748A CN 103001748 A CN103001748 A CN 103001748A CN 2012105717420 A CN2012105717420 A CN 2012105717420A CN 201210571742 A CN201210571742 A CN 201210571742A CN 103001748 A CN103001748 A CN 103001748A
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Abstract
An embodiment of the invention provides a method and device for retransmitting data and processing retransmitted data and aims at preferentially transmitting the data after a multi-access computer (MAC) layer receives radio link control (RLC) retransmitted data, state protocol data unit (PDU) data and other data influencing user perception and avoiding adverse effects on the user perception. The method comprises that a wireless network controller (RNC) builds back-up queues for a priority queue of each medium access control MAC data stream; adding specific data into the back-up queues when the specific data are conformed to be sent, wherein the specific data include the RLC retransmitted data or the state PDU data; and begin to perform data transmission of the back-up queues when RNC conforms that the data exist in the back-up queues.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to method, equipment that a kind of data re-transmission and data retransmission are processed.
Background technology
At TD-SCDMA(Time Division Synchronous Code Division Multiple Access, the TD SDMA access), CDMA2000 (Code Division Multiple Access2000, the CDMA 2000 connecting system), WCDMA(Wideband CDMA, wideband CDMA) etc. in the communication system, HS-DSCH(High Speed Downlink Shared CHannel, high speed descending sharing channel) the MAC(Media Access Control of transmission channel, the media access control) layer data is transmitted by different MAC layer entities at different communication equipments: RNC(Radio Network Controller, radio network controller) the MAC layer entity of side is MAC_D(Dedicated MAC, the specialized media access control), the MAC layer entity of node NodeB comprises MAC_HS (High Speed MAC, high speed media access control) and MAC_EHS (Enhanced High Speed MAC, the access control of evolved high speed media).
Usually, each corresponding priority query of MAC_D stream; MAC_D PDU(Packet DataUnit, Packet Data Unit) at first by Iub mouth (Interface between RNC and NodeB, interface between RNC and the base station) priority query transfers to the base station, and is then rear by the incoming terminal of eating dishes without rice or wine by the base station dispatcher scheduling.Iub mouth flow-control mechanism guarantees that on the one hand the Iub mouth continues to flow, and guarantees on the other hand not accumulate in the buffer memory of base station too many data; Usually, the a little higher than radio interface rate of Iub mouth speed, the base station will notify RNC to stop Iub mouth transfer of data when the data volume of buffer memory in the priority query is abundant, will notify RNC to carry out Iub mouth transfer of data to be higher than radio interface rate when the data volume of buffer memory in the priority query is less; Therefore, in the priority query of base station often buffer memory enough data volumes.
As shown in Figure 1, FP(Frame Protocol, Frame Protocol) can't the identification data type in the frame structure of message, the base station can't obtain MAC_D data cases that PDU passes, and the data of same priority formation can only arrive first first storage.
When RLC(Radio Link Control is arranged, Radio Link control) data retransmission or status PDU etc. need instantaneous transmission when ensureing the particular data of user awareness, and RNC is with prioritised transmission.But, in the priority query of base station often buffer memory enough data volumes, after particular data arrived priority query, the base station can only be buffered in this partial data the back that arrives first data; Afterwards, base station dispatcher carries out priority queueing according to certain dispatching principle, the selection scheduling user.Even this user is dispatched, according to first-in first-out mechanism, particular data must wait until that data cached end of transmission just can be transmitted.
Although transfer of data has flow-control mechanism between the Iub mouth, owing to being between two network elements, to carry out transfer of data, still having partial data and be deposited in the buffer memory of base station.At this moment, if there is particular data to need transmission, the base station need to will be deposited in according to first in first out mechanism the complete particular data that transmits again afterwards of transfer of data of base station buffer memory before, to cause owing to particular data is not in time transmitted the TCP(TransmissionControl Protocol that causes, transmission control protocol) layer data retransmits, and affects the user awareness such as downloading rate and time delay.
Summary of the invention
Method, equipment that the embodiment of the invention provides a kind of data re-transmission and data retransmission to process, in order to after receiving RLC data retransmission and status PDU etc. at the MAC layer and affecting the data of user awareness, these type of data of prioritised transmission are avoided user awareness is caused harmful effect.
The method of a kind of data re-transmission that the embodiment of the invention provides comprises:
Radio network controller (RNC) is set up backup queue for the priority query of each media access control layer MAC data flow;
When defining particular data and need to send, particular data is added described backup queue; Wherein, described particular data comprises: Radio Link control RLC data retransmission or status packet data unit PDU;
When RNC determines in the backup queue data to be arranged, the transfer of data of beginning backup queue.
The method that a kind of data retransmission that the embodiment of the invention provides is processed comprises:
The base station receives the MAC data flow that RNC sends, comprising the dispatching priority indication of the formation under data and the data;
The base station data that selection will send from the MAC data flow that receives, dispatching priority indication according to the formation under the selected data, determine the queue identity of the formation that selected data are affiliated, and judge whether the formation under the selected data is to consult definite backup queue with RNC in advance, if, then before sending selected data, corresponding relation according to the queue identity of the queue identity of the backup queue of consult determining with RNC in advance and priority query is revised as the queue identity of the backup queue under the selected data queue identity of the priority query corresponding with the queue identity of described backup queue;
The base station sends selected data.
A kind of RNC that the embodiment of the invention provides comprises:
Backup queue is set up the unit, is used to the priority query of each media access control layer MAC data flow to set up backup queue;
The backup queue maintenance unit is used for when defining particular data and need to send particular data being added described backup queue; Wherein, described particular data comprises: Radio Link control RLC data retransmission or status packet data unit PDU
The backup queue transmission unit is used for when RNC determines that backup queue has data, the transfer of data of beginning backup queue.
A kind of base station that the embodiment of the invention provides comprises:
Receiving element is used for receiving the MAC data flow that RNC sends, comprising the dispatching priority indication of the formation under data and the data;
Scheduling unit, for the data of selecting from the MAC data flow that receives to send, dispatching priority indication according to the formation under the selected data, determine the queue identity of the formation that selected data are affiliated, and judge whether the formation under the selected data is to consult definite backup queue with RNC in advance; If, then before sending selected data, corresponding relation according to the queue identity of the queue identity of the backup queue of consult determining with RNC in advance and priority query is revised as the queue identity of the formation under the selected data queue identity of the priority query corresponding with the queue identity of described backup queue;
Transmitting element is used for sending selected data.
As seen through the above technical solutions, radio network controller (RNC) is set up backup queue for the priority query of each media access control layer MAC data flow among the present invention; When defining particular data and need to send, particular data is added described backup queue; Wherein, described particular data comprises: Radio Link control RLC data retransmission or status packet data unit PDU; When RNC determines in the backup queue data to be arranged, the transfer of data of beginning backup queue.By increasing virtual backup queue, and preferentially by the formation of Iub port transmission virtual backup; And the data in the prioritised transmission backup queue of base station have solved particular data transmission problem not prompt enough to terminal, have ensured the user awareness such as the time delay of transfer of data and downloading rate.The solution of the present invention need not be revised existing base station to the queuing mechanism of data, need not increase uu (Interfacebetween NodeB and UE: the number of queues interface between base station and the terminal), also need not make amendment to the FP frame structure; And solved many RAB(Radio Acess Bearer, RAB) the transmission problem not prompt enough of particular data when business or multi-user.
Description of drawings
Fig. 1 is the structural representation of existing Iub mouth FP frame;
The schematic flow sheet of the method for a kind of data re-transmission that Fig. 2 provides for the embodiment of the invention;
Fig. 3 provides a kind of schematic flow sheet of processing method of data retransmission for the embodiment of the invention;
Fig. 4 is the structure of existing MAC-HS PDU;
Fig. 5 is the structure of existing MAC-EHS PDU;
The transmission of the complete data retransmission that Fig. 6 provides for the specific embodiment of the invention, the schematic flow sheet of processing;
The structural representation of a kind of RNC that Fig. 7 provides for the embodiment of the invention;
The structural representation of a kind of base station that Fig. 8 provides for the embodiment of the invention.
Embodiment
Method, equipment that the embodiment of the invention provides a kind of data re-transmission and data retransmission to process, in order to after receiving RLC data retransmission and status PDU etc. at the MAC layer and affecting the data of user awareness, these type of data of prioritised transmission are avoided user awareness is caused harmful effect.
Referring to Fig. 2, the method for a kind of data re-transmission that the embodiment of the invention provides comprises:
S201, radio network controller (RNC) are set up backup queue for the priority query of each media access control layer MAC data flow;
S202, when defining particular data and need to send, particular data is added described backup queue; Wherein, described particular data comprises: Radio Link control RLC data retransmission or status packet data unit PDU;
S203, when RNC determines in the backup queue data to be arranged, the beginning backup queue transfer of data.
Better, described particular data comprises that transmission when Radio Link control RLC data retransmission or status packet data unit PDU can't wait can cause user's speed of download to reduce or the data of the problems such as time delay increase.
Better, described backup queue comprises queue identity; Wherein, the queue identity of described backup queue is to determine according to the queue identity of described priority query.Better, the queue identity that can be priority query is fixed the queue identity that deviant obtains backup queue, and fixed offset value is the maximum queue number of supporting at present; Take TD-SCDMA as example, at present maximumly support 3 MAC_D streams, 1 corresponding 1 real priority query of MAC_D stream, so constant offset is minimum desirable 3, considers surplus, can be decided to be 4.RNC side queue identity is priorityQueueId.
Better, described backup queue comprises the dispatching priority indication; Wherein, the dispatching priority of described backup queue is designated as still untapped appointment dispatching priority indication in the area covered by agreement, and described appointment dispatching priority indication is consulted to determine by RNC and base station in advance.Described dispatching priority indication is CmCH-PI(Common Channel Priority Indicator in the RNC service surface, the indication of common signal channel priority), be SPI(Scheduling Priority Indicator in base station side, the dispatching priority indication); Because the actual scope of application of protocol definition scope of dispatching priority indication is wider, therefore can choose in unnecessary value.
Better, other parameter of backup queue keeps get final product identical with described priority query.
Better, described RNC determines that data are arranged in the backup queue, comprising: RNC determines that dispatching priority is designated as in the formation of specifying the dispatching priority indication data are arranged.CmCH-PI distinguishes the real priority query of record and virtual backup queue thereof by the dispatching priority indication.CmCH-PI by true priority query in the FP frame transmits primary data, passes through the CmCH-PI transmission data retransmission of virtual backup queue.
Better, the transfer of data of described beginning backup queue comprises: the transfer of data of suspending priority query; The transfer of data of beginning backup queue; After the transfer of data of backup queue is complete, recover the transfer of data of priority query.
Better, virtual backup queue does not need flow-control mechanism, and the data volume of transmission is processed as the part in the real priority query.
Referring to Fig. 3, the processing method of a kind of data retransmission that the embodiment of the invention provides comprises:
S301, base station receive the MAC data flow that RNC sends, comprising the dispatching priority indication of the formation under data and the data;
S302, the base station data that selection will send from the MAC data flow that receives, dispatching priority indication according to the formation under the selected data, determine the queue identity of the formation that selected data are affiliated, and judge whether the formation under the selected data is to consult definite backup queue with RNC in advance, if, then before sending selected data, corresponding relation according to the queue identity of the queue identity of the backup queue of consult determining with RNC in advance and priority query is revised as the queue identity of the backup queue under the selected data queue identity of the priority query corresponding with the queue identity of described backup queue;
S303, base station send selected data.
Among the S302, the MAC_HS of base station or MAC-EHS distinguish real priority query and virtual backup queue thereof by the dispatching priority indication.
Better, described dispatching priority indication according to the formation under the selected data, determine the queue identity of the formation that selected data are affiliated, comprise: according to the dispatching priority indication of the formation under the selected data, according to consulting definite dispatching priority indication and the relation of queue identity with RNC in advance, determine the queue identity of the formation that selected data are affiliated.Be RNC in advance by the service surface message informing base station scheduling priority indication corresponding relation with queue identity, even do not fill in like this queue identity in the FP frame, the queue identity of the data that receive also can be determined in the base station.
Better, the described base station data that selection will send from the MAC data flow that receives comprise: sort to the data in the MAC data flow that receives according to default rule in the base station; The data that the most forward data conduct of base station selected ordering will send.Be that base station dispatcher is when selecting to send the data of data, do not need to consider to distinguish true priority query and virtual backup formation, usually, base station dispatcher can be considered the qualitative factor of eating dishes without rice or wine when specified data priority, PF(Proportional Fair for example, direct ratio is fair) factor, and QoS of survice (Quality of Service, service quality) parameter comprises SPI, abandons timing DiscardTimer, GBR(Guaranteed Bit Rate, guarantees bit rate).Because data volume is less in the virtual backup formation, Mean Speed is lower, and other formations are higher relatively for the PF factor; Because data retransmission adopts special SPI, the virtual backup formation has special precedence when scheduling queue simultaneously.In addition, other qos parameters such as DiscardTimer, GBR are set rationally, can further improve the priority of virtual backup formation, even first priority scheduling power is arranged.As seen, the priority of data is by base station scheduling algorithm and the common decision of RNC side indication.
Better, among the S302, when the data in the virtual backup formation are scheduled, queue identity Queue ID among the MAC-HS PDU or the LCH_ID(Logic CHannel_IDentity among the MAC-EHS PDU, Logic Channel Identifier) need to fill in the queue identity of the true priority query of its correspondence, could send by eating dishes without rice or wine.Like this, just can evade the virtual backup formation to terminal, terminal does not need to make an amendment.The frame structure of MAC-HSPDU and MAC-EHS PDU is respectively such as Fig. 4, and is shown in Figure 5.
As shown in Figure 6, the below provides specific embodiments of the invention:
S601, RNC need to send the RLC data retransmission, put it into backup queue;
S602, the queue identity priorityQueueId of data retransmission is extended this as 4, and fill in special dispatching priority indication CmCH-PI;
S603, by the data retransmission in the formation of FP transmission backup, CmCH-PI information is arranged among the FP;
S604, base station receive data retransmission from Iub mouth data flow, determine priorityQueueId according to CmCH-PI, and judge these data from backup queue;
S605, base station are according to PF, and the factors such as QoS determine to transmit first data retransmission;
S606, the Queue ID of the PDU of data retransmission is revised as the queue identity 0 of the true formation of 4 correspondences;
The frame of S607, transmission data retransmission is to terminal;
S608, terminal normally receive, resolve the frame of data retransmission.
Referring to Fig. 7, a kind of RNC that the embodiment of the invention provides comprises:
Backup queue is set up unit 71, is used to the priority query of each media access control MAC data flow to set up backup queue;
Backup queue maintenance unit 72 is used for when defining particular data and need to send particular data being added described backup queue; Wherein, described particular data comprises: Radio Link control RLC data retransmission or status packet data unit PDU;
Backup queue transmission unit 73 is used for when RNC determines that backup queue has data, the transfer of data of beginning backup queue.
Better, described backup queue is set up unit 71 when setting up backup queue, comprises the queue identity of backup queue; Wherein, the queue identity of described backup queue is to determine according to the queue identity of described priority query.
Better, described backup queue is set up unit 71 when setting up backup queue, comprises the dispatching priority indication; Wherein, the dispatching priority of described backup queue is designated as still untapped appointment dispatching priority indication in the area covered by agreement, and described appointment dispatching priority indication is consulted to determine by RNC and base station in advance.
Better, when described backup queue transmission unit 73 is used for determining that backup queue has data, specifically be used for: determine that dispatching priority is designated as the formation of specifying dispatching priority to indicate data are arranged.
Better, when backup queue transmission unit 73 is used for the transfer of data of beginning backup queue, specifically be used for: the transfer of data of suspending priority query; The transfer of data of beginning backup queue; After the transfer of data of backup queue is complete, recover the transfer of data of priority query.
Referring to Fig. 8, a kind of base station that the embodiment of the invention provides comprises:
Receiving element 81 is used for receiving the MAC data flow that RNC sends, comprising the dispatching priority indication of the formation under data and the data;
Transmitting element 83 is used for sending selected data.
Better, scheduling unit 82 specifically is used for for the data of selecting from the MAC data flow that receives to send: according to default rule, the data in the MAC data flow that receives are sorted; The data that the most forward data conduct of base station selected ordering will send.
Better, scheduling unit 82 is used for the dispatching priority indication according to the formation under the selected data, when determining the queue identity of the formation that selected data are affiliated, specifically be used for: according to the dispatching priority indication of the formation under the selected data, according to consulting definite dispatching priority indication and the relation of queue identity with RNC in advance, determine the queue identity of the formation that selected data are affiliated.
In sum, method, equipment that the embodiment of the invention provides a kind of data re-transmission and data retransmission to process, be used for after the MAC layer receives RLC data retransmission and status PDU etc. and affects the data of user awareness, these type of data of prioritised transmission are avoided user awareness is caused harmful effect.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, complete implement software example or in conjunction with the form of the embodiment of software and hardware aspect.And the present invention can adopt the form of the computer program of implementing in one or more computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) that wherein include computer usable program code.
The present invention is that reference is described according to flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device producing a machine, so that the instruction of carrying out by the processor of computer or other programmable data processing device produces the device that is used for realizing in the function of flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, so that the instruction that is stored in this computer-readable memory produces the manufacture that comprises command device, this command device is realized the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, so that carry out the sequence of operations step producing computer implemented processing at computer or other programmable devices, thereby be provided for realizing the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame in the instruction that computer or other programmable devices are carried out.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (16)
1. the method for a data re-transmission is characterized in that, the method comprises:
Radio network controller (RNC) is set up backup queue for the priority query of each media access control MAC data flow;
When defining particular data and need to send, particular data is added described backup queue; Wherein, described particular data comprises: Radio Link control RLC data retransmission or status packet data unit PDU;
When RNC determines in the backup queue data to be arranged, the transfer of data of beginning backup queue.
2. the method for claim 1 is characterized in that, described backup queue comprises queue identity; Wherein, the queue identity of described backup queue is to determine according to the queue identity of described priority query.
3. the method for claim 1 is characterized in that, described backup queue comprises the dispatching priority indication; Wherein, the dispatching priority of described backup queue is designated as still untapped appointment dispatching priority indication in the area covered by agreement, and described appointment dispatching priority indication is consulted to determine by RNC and base station in advance.
4. method as claimed in claim 3 is characterized in that, described RNC determines that data are arranged in the backup queue, comprising:
RNC determines that dispatching priority is designated as in the formation of specifying the dispatching priority indication data are arranged.
5. the method for claim 1 is characterized in that, the transfer of data of described beginning backup queue comprises:
Suspend the transfer of data of priority query;
The transfer of data of beginning backup queue;
After the transfer of data of backup queue is complete, recover the transfer of data of priority query.
6. the method that data retransmission is processed is characterized in that, the method comprises:
The base station receives the MAC data flow that RNC sends, comprising the dispatching priority indication of the formation under data and the data;
The base station data that selection will send from the MAC data flow that receives, dispatching priority indication according to the formation under the selected data, determine the queue identity of the formation that selected data are affiliated, and judge whether the formation under the selected data is to consult definite backup queue with RNC in advance, if, then before sending selected data, corresponding relation according to the queue identity of the queue identity of the backup queue of consult determining with RNC in advance and priority query is revised as the queue identity of the backup queue under the selected data queue identity of the priority query corresponding with the queue identity of described backup queue;
The base station sends selected data.
7. method as claimed in claim 6 is characterized in that, the described base station data that selection will send from the MAC data flow that receives comprise:
Sort to the data in the MAC data flow that receives according to default rule in the base station;
The data that the most forward data conduct of base station selected ordering will send.
8. method as claimed in claim 6 is characterized in that, described dispatching priority according to the formation under the selected data is indicated, and determines the queue identity of the formation that selected data are affiliated, comprising:
According to the dispatching priority indication of the formation under the selected data, according to consulting definite dispatching priority indication and the relation of queue identity with RNC in advance, determine the queue identity of the formation that selected data are affiliated.
9. a RNC is characterized in that, this RNC comprises:
Backup queue is set up the unit, is used to the priority query of each media access control MAC data flow to set up backup queue;
The backup queue maintenance unit is used for when defining particular data and need to send particular data being added described backup queue; Wherein, described particular data comprises: Radio Link control RLC data retransmission or status packet data unit PDU;
The backup queue transmission unit is used for when RNC determines that backup queue has data, the transfer of data of beginning backup queue.
10. RNC as claimed in claim 9 is characterized in that, described backup queue is set up the unit when setting up backup queue, comprises the queue identity of backup queue; Wherein, the queue identity of described backup queue is to determine according to the queue identity of described priority query.
11. RNC as claimed in claim 9 is characterized in that, described backup queue is set up the unit when setting up backup queue, comprises the dispatching priority indication; Wherein, the dispatching priority of described backup queue is designated as still untapped appointment dispatching priority indication in the area covered by agreement, and described appointment dispatching priority indication is consulted to determine by RNC and base station in advance.
12. RNC as claimed in claim 11 is characterized in that, when described backup queue transmission unit is used for determining that backup queue has data, specifically is used for:
Determine that dispatching priority is designated as in the formation of specifying the dispatching priority indication data are arranged.
13. RNC as claimed in claim 9 is characterized in that, when the backup queue transmission unit is used for the transfer of data of beginning backup queue, specifically is used for:
Suspend the transfer of data of priority query; The transfer of data of beginning backup queue; After the transfer of data of backup queue is complete, recover the transfer of data of priority query.
14. a base station is characterized in that, this base station comprises:
Receiving element is used for receiving the MAC data flow that RNC sends, comprising the dispatching priority indication of the formation under data and the data;
Scheduling unit, for the data of selecting from the MAC data flow that receives to send, dispatching priority indication according to the formation under the selected data, determine the queue identity of the formation that selected data are affiliated, and judge whether the formation under the selected data is to consult definite backup queue with RNC in advance; If, then before sending selected data, corresponding relation according to the queue identity of the queue identity of the backup queue of consult determining with RNC in advance and priority query is revised as the queue identity of the formation under the selected data queue identity of the priority query corresponding with the queue identity of described backup queue;
Transmitting element is used for sending selected data.
15. base station as claimed in claim 14 is characterized in that, scheduling unit specifically is used for for the data of selecting from the MAC data flow that receives to send:
According to default rule, the data in the MAC data flow that receives are sorted;
The data that the most forward data conduct of base station selected ordering will send.
16. base station as claimed in claim 14 is characterized in that, scheduling unit is used for the dispatching priority indication according to the formation under the selected data, when determining the queue identity of the formation that selected data are affiliated, specifically is used for:
According to the dispatching priority indication of the formation under the selected data, according to consulting definite dispatching priority indication and the relation of queue identity with RNC in advance, determine the queue identity of the formation that selected data are affiliated.
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| CN101547469A (en) * | 2008-03-24 | 2009-09-30 | 华为技术有限公司 | Method, system and device for transmitting data |
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