CN103428246B - The method and terminal that packet data convergence protocol is retransmitted to up IP bags - Google Patents
The method and terminal that packet data convergence protocol is retransmitted to up IP bags Download PDFInfo
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- CN103428246B CN103428246B CN201210159173.9A CN201210159173A CN103428246B CN 103428246 B CN103428246 B CN 103428246B CN 201210159173 A CN201210159173 A CN 201210159173A CN 103428246 B CN103428246 B CN 103428246B
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Abstract
The method and terminal that packet data convergence protocol is retransmitted to up IP bags, methods described are applied in end side, including：If judge up IP bags to be retransmitted without overcompression and encryption, then when being retransmitted to the up IP bags, remove PDCP (PDCP) packet header that the up IP locally preserved is wrapped, restore initial IP packet, then retransmit the initial IP packet.The present invention uses different processing method under different scenes, can effectively reduce the use of memory headroom, especially it is uncompressed it is non-encrypted in the case of, the retransmission processes of IP bags are completed directly can preserving initial IP packet not applying for space internal memory additionally.In addition, compared with prior art, the present invention, to the processing of selectivity, has reached the effect of diverse processing, has improved the efficiency of processing from monistic copy IP bags.
Description
Technical field
The present invention relates to the communications field, and in particular to a kind of PDCP (Packet Data
Convergence Protocol, referred to as PDCP) the layer method and terminal that are retransmitted to up IP bags.
Background technology
E-UTRAN (the evolved Universal Terrestrial Radio Access in wireless access network field
Network, the Universal Terrestrial wireless access network of evolution) 36323 in provide, PDCP layers be used for handle it is wireless in control plane
Internet Protocol bag on Resource management messages and user plane.PDCP includes header-compressed, security functions and switching
When the support reordering and retransmit.PDCP header-compressed mainly uses robust header compression agreement (Robust Header
Compression, referred to as ROHC) carry out.IP is supported when reconstruction and switching that PDCP layers can initiate in chain of command
(Internet Protocol, Internet protocol) bag retransmits.
It can be switched when UE is moved to the coverage of another cell from the coverage of a cell.Switch class
Type can be divided into lossless switching and seamless switching.Lossless switching refers to：Under AM (confirmation) pattern, it is desirable to the data control of transmission
Face can initiate to rebuild in certain circumstances, and under reconstruction state, PDCP initiates the re-transmission of IP bags.Chain of command is caused to initiate to rebuild
Situation can be divided into following four：
(1) RRC (Radio Resource Control, wireless heterogeneous networks) is again with failure；
(2) Radio Link Failure；
(3) integrity protection fails；
(4) handoff failure.
As can be seen here, the re-transmission of PDCP IP bags serves very heavy in LTE (Long Term Evolution, Long Term Evolution)
The effect wanted.
When PDCP handles the re-transmission problem of IP bags at present, the means mainly used are to carry out once copy to IP bags to replicate,
Retain original IP bags, the initial IP packet replicated can be so directly invoked when initiating and retransmitting and is retransmitted.It is but this
Method can take memory space, cause the increase of internal memory.
The content of the invention
It is existing to overcome it is an object of the invention to provide the method and terminal that a kind of PDCP layers are retransmitted to up IP bags
Have to copy when retransmitting packet in technology and replicate the defects of excessive internal memory is taken caused by IP bags.
To solve the above problems, up IP bags are carried out the invention provides a kind of PDCP (PDCP) layer
The method of re-transmission, is applied in end side, including：
If judging, without overcompression and encryption, weight is being carried out up IP bags to be retransmitted to the up IP bags
During biography, remove the PDCP packet header that the up IP locally preserved is wrapped, restore initial IP packet, then retransmit the initial IP
Bag.
Further, methods described also includes：
For the up IP bags through overcompression processing without encryption, the terminal is carried out to the up IP bags
When transmitting first, before operation is compressed, the packet header of the up IP bags, the original packet header as the IP bags are replicated；
When being retransmitted to the up IP bags through overcompression processing, removed in the up IP bags locally preserved
PDCP heads and IP packet header, after adding the original packet header, retransmit the up IP bags.
Further, methods described also includes：
If judging, up IP bags to be retransmitted are handled by encryption without overcompression, and weight will be treated described in preservation
The up IP bags passed remove PDCP heads and obtain no PDCP heads message；
Processing is decrypted to the no PDCP heads message, obtains initial IP packet；
Retransmit the initial IP packet.
Further, methods described also includes：
For the up IP bags through overcompression and encryption, the terminal is transmitted first to the up IP bags
During, replicate original packet header of the packet header of the up IP bags as the up IP bags；
When being retransmitted to the IP bags, after the PDCP heads for removing the IP bags locally preserved, processing is decrypted,
Then remove IP packet header, along with the original packet header, obtain initial IP packet；
Retransmit the initial IP packet.
Correspondingly, present invention also offers a kind of terminal, including：
Judge module, for judging up IP bags to be retransmitted whether through overcompression and encryption；
Processing module, for judging the up IP bags to be retransmitted without overcompression and encryption in the judge module
After processing, remove the PDCP packet header that the up IP locally preserved is wrapped, restore initial IP packet；
Sending module, for retransmitting the IP bags obtained after processing module processing.
Further, the terminal also includes：
Pretreatment module, for for, without the up IP bags of encryption, being passed through overcompression processing first
When defeated, before operation is compressed, the packet header of the up IP bags, the original packet header as the IP bags are replicated；
The processing module is additionally operable to when being retransmitted to the up IP bags through overcompression processing, in local preservation
The up IP bags in remove PDCP heads and IP packet header, add the original packet header.
Further,
Processing module be additionally operable to the judge module judge up IP bags to be retransmitted by encryption without
During compression processing, up IP bags to be retransmitted described in preservation are removed into PDCP heads and obtain no PDCP heads message；It is additionally operable to institute
State no PDCP heads message and processing is decrypted, obtain initial IP packet.
Further, methods described also includes：
Pretreatment module, for for the up IP bags through overcompression and encryption, being carried out to the up IP bags
During transmitting first, original packet header of the packet header of the up IP bags as the up IP bags is replicated；
The processing module is additionally operable to, when retransmitting the up IP bags through overcompression and encryption, remove
After the PDCP heads of the IP bags locally preserved, processing is decrypted, then removes IP packet header, along with the original packet header,
Obtain initial IP packet.
The once copy that prior art is unified to IP bags replicates, the maximum upper limit preserved until reaching IP bags, so
Occupy very big space and internal memory.The present invention uses processing method different under different scenes, can effectively reduce internal memory
The use in space, especially it is uncompressed it is non-encrypted in the case of, directly can not additionally apply for that space internal memory preserves initial IP packet
Retransmission processes with regard to completing IP bags.In addition, compared with prior art, the present invention is from monistic copy IP bags at selectivity
Reason, has reached the effect of diverse processing, has improved the efficiency of processing.
Brief description of the drawings
Fig. 1 is system physical connection diagram in the embodiment of the present invention；
Fig. 2 is the protocol layer architecture schematic diagram of related network elements in system in the embodiment of the present invention；
Fig. 3 is the method flow diagram that PDCP layers are retransmitted to up IP bags in the embodiment of the present invention；
Fig. 4 is the structural representation of terminal in the embodiment of the present invention.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with accompanying drawing to the present invention
Embodiment be described in detail.It should be noted that in the case where not conflicting, in the embodiment and embodiment in the application
Feature can mutually be combined.
As shown in figure 1, system includes UE (User Equipment, user equipment) and base station (eNB).Wherein, on UE
Include CC (Call Control, Call- Control1) plate, BPL (BaseBand Processor Tpye L, LTE Baseband Processing Unit L-type)
Plate, RF (Radio Frequency, radio frequency) plate and power supply, fan etc..As shown in Fig. 2 the communications protocol that user plane is included
Layer includes from top to bottom：PDCP, RLC (Radio Link Control, wireless chain control layer), MAC (Media Access
Control, media access control layer) and PHY (physical layer).There is the signaling information interacted between UE and eNB same protocol layer.
In UE sides, upstream data is transmitted along the direction of protocol layer from top to bottom；And in eNB sides, upstream data be along protocol layer under
Transmitted to upper direction.
Provided according to existing protocol, UE ends need to be entered when carrying out transmitting uplink data along the order of protocol layer from top to bottom
After row processing, base station side is sent to by PHY layer., can be to not being sent to normally after being handled due to rlc layer up IP bags
The IP bags of base station are preserved.Therefore the IP that the IP data after being preserved according to rlc layer retransmit required for can restoring PDCP layers
Data.
PDCP layers include head compression (Header Compression) and AES (Ciphering) the two work(
Can, accordingly, processing of the PDCP layers to IP bags can include following several situations：
A) without compression without encryption situation
B) there is compression without encryption situation
C) nothing is compressed with encryption situation
D) it is compressed with encryption situation.
In the present embodiment, for above-mentioned 4 kinds of different dispositions, the side that PDCP layers are retransmitted to up IP bags
Method, including：
1) without compression without encryption situation
Because under such a disposition, IP bags are not through overcompression and encryption, therefore IP bags do not occur big
Change, PDCP head has simply been added in initial IP packet, therefore, has been wrapped as shown in figure 3, UE can remove the IP locally preserved
PDCP packet header, restore initial IP packet, then initiate the re-transmission of the initial IP packet.
Space is most saved in this case, and the time used is also minimum.
2) there is compression without encryption situation
Because compression simply changes the packet header of initial IP packet, and the content of IP bags is not changed, so being transmitted first
During the IP bags, the packet header of the IP bags, the original packet header as the IP bags can be replicated before operation is compressed；
When being retransmitted to the IP bags, after removing PDCP heads and IP packet header in the IP bags locally preserved, in addition
After stating original packet header, the IP bags are sent.
Due to not having to so whole IP packet replications copy once, so as to greatly reduce the use of internal memory.
3) nothing is compressed with encryption situation
In this case, the method that reduction re-encrypts first is decrypted using the IP bags to preservation to handle.Include：
A the IP bags to be retransmitted locally preserved) are removed into PDCP heads, obtain no PDCP heads message；
B processing) is decrypted without PDCP head messages to this, obtains initial IP packet；
C the initial IP packet) is retransmitted.
Although this method adds processing time, but effectively avoided compared with original copy replicating original IP bags
The use of memory headroom.
4) it is compressed with encryption situation
In this case, first copy replicates IP heads, the IP bags before being encrypted by the method for decryption reduction, Ran Houtong
Cross and copy original IP heads, initial IP packet can be restored, can thus initiate the re-transmission of IP bags.Specifically include：
A) during to IP bags transmit first, copy replicates original packet of the packet header of the IP bags as the IP bags
Head；
B) when the IP bags retransmit, remove the PDCP heads of the IP bags to be retransmitted locally preserved, obtain no PDCP
Head message；
C processing) is decrypted without PDCP head messages to this, the IP bags before being encrypted；
D the IP bags before encryption) are removed into IP packet header and obtain core message；
E) the core message is added to the initial IP head locally preserved just restored initial IP packet；
F the initial IP packet) is retransmitted.
In a word, as shown in table 1, in the case of without compressing without encryption, using the above method, with the IP bags for removing PDCP heads
Retransmitted, both reduced the occupancy of space internal memory but also few holding time.For other scenes, if to internal memory
Using broad, and to time requirement it is harsher in the case of, IP bag re-transmission problems can uses original copy IP bags
To wait the method retransmitted, the time once copied has so been only taken up.If the use to internal memory is harsher, and to the time
It is required that than it is broad when, it is possible to use the above-mentioned processing method under related scene, although adding some processing times,
It is to eliminate copy significantly to replicate the shared internal memory of IP bags.
Using effect analysis signal table under 1 each scene of table
A kind of terminal, as shown in figure 4, including：
Judge module, for judging up IP bags to be retransmitted whether through overcompression and encryption；
Processing module, for judging the up IP bags to be retransmitted without overcompression and encryption in the judge module
After processing, remove the PDCP packet header that the up IP locally preserved is wrapped, restore initial IP packet；
Sending module, for retransmitting the IP bags obtained after processing module processing.
It is preferred that the terminal also includes：
Pretreatment module, for for, without the up IP bags of encryption, being passed through overcompression processing first
When defeated, before operation is compressed, the packet header of the up IP bags, the original packet header as the IP bags are replicated；
The processing module is additionally operable to when being retransmitted to the up IP bags through overcompression processing, in local preservation
The up IP bags in remove PDCP heads and IP packet header, add the original packet header.
It is preferred that
Processing module be additionally operable to the judge module judge up IP bags to be retransmitted by encryption without
During compression processing, up IP bags to be retransmitted described in preservation are removed into PDCP heads and obtain no PDCP heads message；It is additionally operable to institute
State no PDCP heads message and processing is decrypted, obtain initial IP packet.
It is preferred that methods described also includes：
Pretreatment module, for for the up IP bags through overcompression and encryption, being carried out to the up IP bags
During transmitting first, original packet header of the packet header of the up IP bags as the up IP bags is replicated；
The processing module is additionally operable to, when retransmitting the up IP bags through overcompression and encryption, remove
After the PDCP heads of the IP bags locally preserved, processing is decrypted, then removes IP packet header, along with the original packet header,
Obtain initial IP packet.
One of ordinary skill in the art will appreciate that all or part of step in the above method can be instructed by program
Related hardware is completed, and described program can be stored in computer-readable recording medium, such as read-only storage, disk or CD
Deng.Alternatively, all or part of step of above-described embodiment can also be realized using one or more integrated circuits.Accordingly
Ground, each module/unit in above-described embodiment can be realized in the form of hardware, can also use the shape of software function module
Formula is realized.The present invention is not restricted to the combination of the hardware and software of any particular form.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the present invention.According to
The content of the invention of the present invention, can also there is other various embodiments, in the case of without departing substantially from spirit of the invention and its essence, be familiar with
Those skilled in the art works as can make various corresponding changes and deformation according to the present invention, all in the spirit and principles in the present invention
Within, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (2)
1. a kind of method that PDCP (PDCP) layer is retransmitted to up IP bags, is applied in end side, including：
The type for judging up IP bags to be retransmitted is：By not compressing not encryption, close processing is not added with through overcompression, is passed through
Processing is not compressed in encryption, or through overcompression and encryption；
If the type for judging up IP bags to be retransmitted is by not compressing not encryption, entering to the up IP bags
When row retransmits, remove the PDCP packet header that the up IP to be retransmitted locally preserved is wrapped, restore initial IP packet, Ran Houchong
Pass the initial IP packet；
If the type for judging up IP bags to be retransmitted is through overcompression to be not added with close processing, to it is described be not added with through overcompression it is close
When the up IP bags of processing are retransmitted, removed in the up IP bags for being not added with close processing through overcompression locally preserved
PDCP heads and the packet header through overcompression, after adding original packet header, restore initial IP packet, retransmit the initial IP packet, the original
Beginning, packet header obtained in the following manner：Up IP bags for that will be compressed not encryption, the terminal is to described
When will be compressed the up IP bags of not encryption and be transmitted first, before operation is compressed, replicate it is described will
The packet header of the IP bags of not encryption is compressed, as original packet header；
If the type for judging up IP bags to be retransmitted is not compress processing by encryption, will be to be retransmitted described in preservation
After PDCP heads in up IP bags remove, processing is decrypted, obtains initial IP packet, retransmit the initial IP packet；
If the type for judging up IP bags to be retransmitted is through overcompression and encryption, to described through overcompression and encryption
When the IP bags of processing are retransmitted, after removing the PDCP heads through in the IP bags of overcompression and encryption locally preserved,
Processing is decrypted, then removes the packet header through overcompression, along with original packet header, obtains initial IP packet, retransmits initial IP packet,
The original packet header obtains in the following manner：For that will be compressed and the up IP bags of encryption, the terminal exist
To it is described will be compressed and the up IP bags of encryption carry out first transmit during, will be pressed described in duplication
The packet header of the up IP bags of contracting and encryption is as original packet header.
2. a kind of terminal, including：
Judge module, for judging that the type of up IP bags to be retransmitted is：By not compressing not encryption, through overcompression not
Encryption, processing is not compressed by encryption, or through overcompression and encryption；
First processing module, the type for judging the up IP bags to be retransmitted in the judge module are by not pressing
Contract after not encryption, remove the PDCP packet header that the up IP to be retransmitted locally preserved is wrapped, restore initial IP packet；
First sending module, for retransmitting the initial IP packet obtained after first processing module processing；
Second processing module, the type for judging the up IP bags to be retransmitted in the judge module are through overcompression
After not encryption, to it is described be not added with the up IP bags of close processing through overcompression and retransmit when, in the warp locally preserved
PDCP heads and the packet header through overcompression are removed in the up IP bags of overcompression not encryption, original packet header is added, obtains original
IP bags；
First pretreatment module, for providing the original packet header for the Second processing module, specifically include：
Up IP bags for not encryption will be compressed, when being transmitted first, before operation is compressed,
The packet header of up IP bags of not encryption will be compressed described in duplication as original packet header；
Second sending module, for retransmitting the initial IP packet passed through the Second processing module and handle to obtain；
3rd processing module, the type for judging up IP bags to be retransmitted in the judge module are not pressed by encryption
After contracting processing, described in preservation after the PDCP heads in the up IP bags retransmitted remove, processing will be decrypted, obtain initial IP
Bag；
3rd sending module, for retransmitting the initial IP packet obtained after the 3rd processing module processing；
Fourth processing module, the type for judging the up IP bags to be retransmitted in the judge module are through overcompression
And after encryption, when being retransmitted to the up IP bags through overcompression and encryption, remove the institute locally preserved
State after the PDCP heads in the up IP bags of overcompression and encryption, processing is decrypted, then removes the bag through overcompression
Head, along with original packet header, obtain initial IP packet；
Second pretreatment module, for providing original packet header for the fourth processing module, specifically include：
For that will be compressed and the up IP bags of encryption, in the process transmitted first to the up IP bags
In, the packet header of the up IP bags is replicated as original packet header；
4th sending module, for retransmitting the initial IP packet obtained after fourth processing module processing.
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| CN107950050B (en) * | 2015-09-08 | 2020-03-20 | 华为技术有限公司 | Message processing method and base station |
| CN110447261B (en) * | 2017-03-23 | 2024-03-01 | Oppo广东移动通信有限公司 | Method for transmitting data, terminal device and network device |
| CN110167067B (en) * | 2018-02-13 | 2021-10-22 | 展讯通信（上海）有限公司 | Data transmission method and device, storage medium, terminal and base station |
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| CN101547141A (en) * | 2008-03-25 | 2009-09-30 | 华为技术有限公司 | Method, system and device for data transmission |
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| CN1913534B (en) * | 2006-08-17 | 2010-12-01 | 华为技术有限公司 | Data processing method and communication equipment |
| KR100917205B1 (en) * | 2007-05-02 | 2009-09-15 | 엘지전자 주식회사 | Method of configuring a data block in wireless communication system |
| EP2157741B1 (en) * | 2007-05-11 | 2017-03-29 | Fujitsu Limited | Method of controlling header compression in wireless communication, and wireless station and transmitting device |
| WO2009018318A2 (en) * | 2007-08-02 | 2009-02-05 | Interdigital Patent Holdings, Inc. | Packet data convergence protocol procedures |
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| CN101547141A (en) * | 2008-03-25 | 2009-09-30 | 华为技术有限公司 | Method, system and device for data transmission |
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