CN102348242A - Method and device for processing forwarded data - Google Patents
Method and device for processing forwarded data Download PDFInfo
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- CN102348242A CN102348242A CN2011102887711A CN201110288771A CN102348242A CN 102348242 A CN102348242 A CN 102348242A CN 2011102887711 A CN2011102887711 A CN 2011102887711A CN 201110288771 A CN201110288771 A CN 201110288771A CN 102348242 A CN102348242 A CN 102348242A
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Abstract
The invention discloses a method and device for processing forwarded data, and the method and device provided by the invention are used for processing the data after the data are forwarded. The method comprises: a source base station sends SDUs (service data units) needing to be forwarded to a target base station in a switching process; and the source base station stores the forwarded SDUs into a storage medium. The invention also discloses a device for realizing the method.
Description
Technical field
The present invention relates to the communications field, particularly relate to the processing method and the device of forwarding data.
Background technology
In LTE (Long Term Evolution) system, in order when switching, to reduce losing of business data packet as far as possible, base station side PDCP (Packet Data Convergence Protocol, PDCP) layer can carry out the data forwarding operation.The concrete operations of data forwarding are: when switching generation; Source base station can be with SDU (the Service Data Unit of PDCP layer; Service Data Unit) packet is transmitted to target BS, and the PDCP layer of target BS can be issued low layer (down direction) or high-rise (up direction) with these packets.Agreement has stipulated that which SDU can be by preceding commentaries on classics; For example; For RLC-AM (Radio Link Control-Acknowledged Mode; The affirmation pattern of radio link control) the descending PDCP SDU of pattern, source base station can change related in the past SN (Sequence Number, sequence number) but also do not receive the SDU of affirmation and the SDU that does not also have related SN.For the up PDCP SDU of RLC-AM pattern, source base station can change the out of order SDU that receives in the past.For the descending PDCPSDU of RLC-UM (Radio Link Control-Unacknowledged Mode, the Unacknowledged Mode of radio link control) pattern, source base station can change in the past and also not begin the SDU that transmits.For the up PDCP SDU of RLC-UM pattern, source base station does not carry out data forwarding.
At present how agreement is handled the data of changeing before this part after the regulation source base station does not carry out data forwarding.The mode that a kind of ratio is easier to expect is the data of changeing before the deletion, if but handoff failure, the data of changeing before source base station need use, and deleted this part data this moment, then traffic affecting transmission.
Summary of the invention
The embodiment of the invention provides a kind of processing method and device of forwarding data, is used to realize behind the data forwarding processing to this part data.
A kind of processing method of forwarding data may further comprise the steps:
In handoff procedure, the SDU that will change before source base station will need sends to target BS;
Source base station is kept at the SDU of preceding commentaries on classics in the storage medium.
A kind of base station comprises:
Interface module is used at handoff procedure the SDU that changes before the need being sent to target BS;
Control module is used for the SDU of preceding commentaries on classics is kept at storage medium.
Source base station is kept at it in storage medium after changeing before with SDU in the embodiment of the invention, so that the SDU of preservation capable of using continues current business during handoff failure.
Description of drawings
Fig. 1 is the main methods flow chart of forwarding data in the embodiment of the invention;
Fig. 2 is the process flow figure of forwarding data when passing through occupancy control SDU storage in the embodiment of the invention;
Fig. 3 in the embodiment of the invention when controlling the SDU storage memory time process flow figure of forwarding data;
Fig. 4 in the embodiment of the invention when controlling occupancy and memory time SDU and store the process flow figure of forwarding data;
The process flow figure of forwarding data when Fig. 5 receives RRC connection re-establishment request for source base station in the embodiment of the invention;
Fig. 6 is the structure chart of base station in the embodiment of the invention.
Embodiment
Source base station is kept at it in storage medium after changeing before with SDU in the embodiment of the invention, so that the SDU of preservation capable of using continues current business during handoff failure.
Referring to Fig. 1, the main methods flow process of forwarding data is following in the present embodiment:
Step 101: in handoff procedure, the SDU that will change before source base station will need sends to target BS.
Step 102: source base station is kept at the SDU of preceding commentaries on classics in the storage medium.
For the SDU that changes before not needing, this part SDU of source base station deletion.
The SDU that changes before needing comprises the up SDU of SDU that obtains through the S1 interface and/or the RLC-AM pattern of receiving.
Because the SDU that preserves need take certain memory space; So preferable, before preserving SDU, judge earlier whether storage medium satisfies the condition of storage SDU; Whether just source base station is judged needs the preceding SDU that changes need be kept in the storage medium; If satisfy condition, the SDU that changes before to need promptly needing is kept in the storage medium, then preserves.The condition of judging is not unique, and for example, whether source base station judges the resources occupation rate of the storage medium that current PDCP is corresponding greater than preset occupancy thresholding, and if not, the SDU that changes before need then confirming need be kept in the storage medium; And/or; The duration that source base station is judged the storage medium packet discard that preset PDCP is corresponding with need before the difference of SDU already present duration in storage medium of changeing whether greater than preset duration thresholding; If not, need then to confirm the preceding SDU that changes to be kept in the storage medium.
Come to introduce in detail the processing method of forwarding data below through several embodiment.
Referring to Fig. 2, the process flow of forwarding data is following when passing through occupancy control SDU storage in the present embodiment:
Step 201: in handoff procedure, the SDU that source base station changes before need confirming.
Does step 202: source base station judge that whether the resources occupation rate R1 of the storage medium that current PDCP is corresponding is greater than preset occupancy thresholding R2, i.e. R1＞R2? If then continue step 203, otherwise continue step 206.Storage medium in the present embodiment that PDCP is corresponding is called the PDCP buffer memory.
Step 203: source base station judges whether the preceding SDU that changes that preserves is before arranged in the PDCP buffer memory, if then continue step 204, otherwise continue step 205.
Step 204: the preceding SDU that changes that preserves before source base station is deleted from the PDCP buffer memory.Preferable, source base station is deleted the preceding SDU that changes that preserves at first from the PDCP buffer memory.Continue step 202.
Step 205: the SDU that source base station changes before in the PDCP buffer memory, not preserving and needing.Continue step 207.
Step 206: the SDU that source base station changes before in the PDCP buffer memory, preserving and needing.Continue step 207.
Step 207: the SDU that will change before source base station will need sends to target BS.
Referring to Fig. 3, the process flow through controlling SDU when storage forwarding data memory time in the present embodiment is following:
Step 301: in handoff procedure, the SDU that source base station changes before need confirming.
Step 302: the duration T2 that source base station is judged the storage medium packet discard that preset PDCP is corresponding with need before the difference of SDU already present duration T1 in storage medium of changeing whether greater than preset duration thresholding T3; T2-T1＞T3? If; Then continue step 303, otherwise continue step 304.Storage medium in the present embodiment that PDCP is corresponding is called the PDCP buffer memory.
Step 303: the SDU that source base station changes before in the PDCP buffer memory, not preserving and needing.Continue step 305.
Step 304: the SDU that source base station changes before in the PDCP buffer memory, preserving and needing.Continue step 305.
Step 305: the SDU that will change before source base station will need sends to target BS.
Referring to Fig. 4, the process flow through controlling occupancy and memory time SDU when storage forwarding data in the present embodiment is following:
Step 401: in handoff procedure, the SDU that source base station changes before need confirming.
Does step 402: source base station judge that whether the resources occupation rate R1 of the storage medium that current PDCP is corresponding is greater than preset occupancy thresholding R2, i.e. R1＞R2? If then continue step 403, otherwise continue step 404.Storage medium in the present embodiment that PDCP is corresponding is called the PDCP buffer memory.
Step 403: source base station judges whether the preceding SDU that changes that preserves is before arranged in the PDCP buffer memory, if then continue step 405, otherwise continue step 406.
Step 404: the duration T2 that source base station is judged the storage medium packet discard that preset PDCP is corresponding with need before the difference of SDU already present duration T1 in storage medium of changeing whether greater than preset duration thresholding T3; T2-T1＞T3? If; Then continue step 406, otherwise continue step 407.
Step 405: the preceding SDU that changes that preserves before source base station is deleted from the PDCP buffer memory.Preferable, source base station is deleted the preceding SDU that changes that preserves at first from the PDCP buffer memory.Continue step 402.
Step 406: the SDU that source base station changes before in the PDCP buffer memory, not preserving and needing.Continue step 408.
Step 407: the SDU that source base station changes before in the PDCP buffer memory, preserving and needing.Continue step 408.
Step 408: the SDU that will change before source base station will need sends to target BS.
Source base station receives that in handoff procedure source base station stopped the preceding commentaries on classics of SDU when the Radio Resource of UE transmission was controlled (RRC) connection re-establishment request and the preceding SDU of commentaries on classics.This process is referring to following embodiment.
Referring to Fig. 5, the process flow of forwarding data was following when source base station was received RRC connection re-establishment request in the present embodiment:
Step 501: source base station changes SDU before target BS in handoff procedure.This moment, the PDCP entity was in suspended state.
Step 502: source base station receives the RRC connection re-establishment request that UE sends.
Step 503: source base station sends handover cancelling message to target BS.
Step 504: source base station stop corresponding PDCP entity before turn over journey.
Step 505: the PDCP entity in the source base station returns the normal process state.
Understood the processing procedure of forwarding data through above introduction, this process is mainly realized by the base station, introduces in the face of the internal structure and the function of base station down.
Referring to Fig. 6, the base station comprises in the present embodiment: interface module 601 and control module 602.
Source base station is kept at it in storage medium after changeing before with SDU in the embodiment of the invention, so that the SDU of preservation capable of using continues current business during handoff failure.Before the SDU that the embodiment of the invention is changeed, also need judge whether the SDU that changes before enough memory spaces are stored before maintenance, if the space is enough, the SDU that changes before then preserving, otherwise do not preserve.And/or whether SDU already present time in memory space of changeing before judging is long, if long, the possibility of confirming to use once more this SDU is little, the SDU that changes before then not preserving, otherwise preserve.The embodiment of the invention also when source base station is received the RRC connection re-establishment request of UE transmission in handoff procedure, provides fallback mechanism, changes SDU before stopping, and it is normal that its inner PDCP entity recovers.
Those skilled in the art should understand that embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of the embodiment of complete hardware embodiment, complete software implementation example or combination software and hardware aspect.And the present invention can be employed in the form that 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 go up the computer program of implementing.
The present invention is that reference is described according to the 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 to produce a machine, make the instruction of carrying out through the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented 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 appointments.
These computer program instructions also can be stored in ability vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work; Make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in 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; Make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of on computer or other programmable devices, carrying out is provided for being implemented in 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.
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, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (12)
1. the processing method of a forwarding data is characterized in that, may further comprise the steps:
In handoff procedure, the SDU that will change before source base station will need sends to target BS;
Source base station is kept at the SDU of preceding commentaries on classics in the storage medium.
2. the method for claim 1 is characterized in that, also comprises step: the SDU that changes before the source base station deletion does not need.
3. the method for claim 1 is characterized in that, the SDU that changes before needing comprises the up SDU of SDU that obtains through the S1 interface and/or the RLC-AM pattern of receiving.
4. the method for claim 1 is characterized in that, source base station also comprises step before being kept at the SDU of preceding commentaries on classics in the storage medium: source base station judges whether the SDU that changes before needing need be kept in the storage medium;
Be judged as when being, source base station is kept at the SDU of preceding commentaries on classics in the storage medium.
5. method as claimed in claim 4 is characterized in that, source base station judges according to one of following condition whether needs are kept in the storage medium SDU that needs preceding commentaries on classics at least:
Whether source base station judges the resources occupation rate of the storage medium that current PDCP is corresponding greater than preset occupancy thresholding, and if not, the SDU that changes before need then confirming need be kept in the storage medium;
The duration that source base station is judged the storage medium packet discard that preset PDCP is corresponding with need before the difference of SDU already present duration in storage medium of changeing whether greater than preset duration thresholding, if not, the SDU that changes before need then confirming need be kept in the storage medium.
6. like each described method in the claim 1 to 5, it is characterized in that, also comprise step: when source base station was received the radio resource control RRC connection re-establishment request of UE transmission and the preceding SDU of commentaries on classics, source base station stopped the preceding commentaries on classics of SDU.
7. a base station is characterized in that, comprising:
Interface module is used at handoff procedure the SDU that changes before the need being sent to target BS;
Control module is used for the SDU of preceding commentaries on classics is kept at storage medium.
8. base station as claimed in claim 7 is characterized in that, control module also is used to delete the SDU that does not need preceding commentaries on classics.
9. base station as claimed in claim 7 is characterized in that, the SDU that changes before needing comprises the up SDU of SDU that obtains through the S1 interface and/or the RLC-AM pattern of receiving.
10. base station as claimed in claim 7 is characterized in that, control module also is used for judging needs the preceding SDU that changes whether need be kept at storage medium; Be judged as when being, the SDU of preceding commentaries on classics is being kept in the storage medium.
11. base station as claimed in claim 10 is characterized in that, control module judges according to one of following condition whether needs are kept in the storage medium SDU that needs preceding commentaries on classics at least:
Whether control module judges the resources occupation rate of the storage medium that current PDCP is corresponding greater than preset occupancy thresholding, and if not, the SDU that changes before need then confirming need be kept in the storage medium;
The duration that control module is judged the storage medium packet discard that preset PDCP is corresponding with need before the difference of SDU already present duration in storage medium of changeing whether greater than preset duration thresholding; If not, need then to confirm the preceding SDU that changes to be kept in the storage medium.
12., it is characterized in that when interface module was received the radio resource control RRC connection re-establishment request of UE transmission and the preceding SDU of commentaries on classics, control module stopped the preceding commentaries on classics of SDU like each described base station in the claim 7 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102887711A CN102348242A (en) | 2011-09-26 | 2011-09-26 | Method and device for processing forwarded data |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102887711A CN102348242A (en) | 2011-09-26 | 2011-09-26 | Method and device for processing forwarded data |
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| CN2011102887711A Pending CN102348242A (en) | 2011-09-26 | 2011-09-26 | Method and device for processing forwarded data |
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| CN109151918A (en) * | 2017-06-13 | 2019-01-04 | 华为技术有限公司 | Method for handover control and device |
| CN113840342A (en) * | 2020-06-24 | 2021-12-24 | 大唐移动通信设备有限公司 | Data forwarding and retransmitting method and device |
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| CN113840342A (en) * | 2020-06-24 | 2021-12-24 | 大唐移动通信设备有限公司 | Data forwarding and retransmitting method and device |
| CN113840342B (en) * | 2020-06-24 | 2023-02-03 | 大唐移动通信设备有限公司 | Data forwarding and retransmitting method and device |
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Application publication date: 20120208 |