CN101998438B - Method and equipment for improving performance of PDCP (Packet Data Convergence Protocol) ROHC (Robust Header Compression) algorithm - Google Patents
Method and equipment for improving performance of PDCP (Packet Data Convergence Protocol) ROHC (Robust Header Compression) algorithm Download PDFInfo
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Abstract
The embodiment of the invention provides a method for improving the performance of a PDCP (Packet Data Convergence Protocol) ROHC (Robust Header Compression) algorithm, which comprises the following steps: an uncompressing end monitors and makes statistics on channel condition information; and when monitoring that the channel condition exceeds a preset threshold value, the uncompressing end carries out state transition and mode switching and sends ACK (Acknowledgment) or NACK(Negative Acknowledgement) to the compressing end of equipment which receives and transmits an ROHC compressed data packet to excite the compressing end to carry out the state transition and mode switching. The embodiment of the invention also provides equipment for improving the performance of the PDCP (Packet Data Convergence Protocol) robust header compression algorithm. In the technical scheme of the embodiment of the invention, by introducing in a new standard for judging the change of the channel condition, the sensitivity and the accuracy of ROHC are improved, the respective working state and operation mode of a compressing-state machine and an uncompressing state machine can be adjusted rapidly, thereby timely and effectively preventing the error diffusion and packet loss spread of contiguous packet data.
Description
Technical field
The present invention relates to moving communicating field, particularly, the present invention relates to a kind of method and apparatus of the PDCP of lifting robustness header compression algorithm performance.
Background technology
Mobile and broadband becomes the developing direction of modern communication technology, 3GPP (3rd GenerationPartnership Project, third generation partner program) is devoted to LTE (Long TermEvolution, Long Term Evolution) system is as the evolution of 3G system, and target is that development 3GPP wireless access technology is towards high data rate, the low delay and the evolution of optimization packet data application direction.
Sublayer PDCP in the L2 of the LTE system layer (Packet Data Convergence Protocol, PDCP) adopted a kind of head compression technology ROHC (Robust headerCompression in, the compression of robustness head) algorithm is specifically provided by file RFC3095.The ROHC head compression that proposes in the RFC3095 agreement can be described as between two state machines---the interaction of compressive state machine and decompression states machine.By set up the i.e. static and dynamic header field of a cover of context Context at the state machine of both link ends, obtain compression gains.Must keep context synchronous when compression end and decompressor end operation, ROHC has added Cyclic Redundancy Check in compressed packet, and can pass through feeding back ACK/NACK (Acknowledgment, affirmation/Negative Acknowledgment denies) guarantee that context is in time, correctly upgrade.
Compression end has three kinds of state: IR (initialization refreshes), FO (first order), SO (second level) state, the state representation of compression end a compression degree that can carry out.Decompressor end also has three kinds of state: NC (no context), SC (static context), FC (complete context), state representation decompressor end can decompress(ion) corresponding data packet header ability, thereby the state correspondence compression performance.Can move mutually between the state.
ROHC supports three kinds of operator scheme: U (unidirectional), O (bidirectional optimistic), R (two-way reliable) pattern.Three kinds of patterns can be changed mutually.Every kind of pattern has been stipulated mode and the frequency (for example whether more using feedback etc.) of some information interactions.If can in time be transformed into ipsec reliable mode IPSEC, feedback informations such as just can be more more mutual states, special domain can guarantee the contextual consistency of receiving-transmitting sides as far as possible, thereby improve the correct probability that decompresses under the high compression ratio state.
During RFC3095 agreement regulation decompressor end CRC success, if current be that update packet is that IR/DYN wraps then feeding back ACK.Compression end and decompressor end initially all are operated in the U pattern, will be transformed into O pattern or R pattern after update packet of decompressor end success decompress(ion), and to compression end feeding back ACK message, trigger compression end and also be transformed into O pattern or R pattern.Two ends will be operated in O or R pattern later on.If decompressor end continuous monitoring under the R pattern is then carried out NC-to CRC check success〉SC-〉state transition of FC, and feeding back ACK (O) carries out R-〉conversion of O pattern.If decompressor end continuous monitoring under the O pattern then with the state degradation, is carried out O-to the CRC check failure〉conversion of R pattern, and feedback NACK (R).According to feedback information, compression end is carried out corresponding motion action, so that collaborative context state is synchronous.
Yet, in existing ROHC algorithm, ROHC just relies on migration step by step and the pattern conversion that these single means of ROHC decompressor end CRC check are carried out state, this verification that depends on decompressor end CRC comes the quality of indirect channel perception environment, sensitive and accurate inadequately, can't regulate compression and decompressed state machine operating state and operator scheme separately rapidly, error diffusion and packet loss to the adjacency grouped data are propagated and can not be prevented timely and effectively, have a strong impact on the compression performance of stability of data transmission and ROHC, reduced user's QOS.Therefore, be necessary to propose a kind of technical scheme, solve ROHC and just rely on the problem that these single means of ROHC decompressor end CRC check are carried out migration step by step and the pattern conversion of state, by improving sensitivity and the accuracy of ROHC, regulate compression and decompressed state machine operating state and operator scheme separately rapidly, error diffusion and the packet loss propagation of adjacency grouped data prevented timely and effectively.
Summary of the invention
Purpose of the present invention is intended to solve at least one of above-mentioned technological deficiency, particularly solve ROHC and just rely on the problem that these single means of ROHC decompressor end CRC check are carried out migration step by step and the pattern conversion of state, by introducing the standard of new judgement changes in channel conditions, improve sensitivity and the accuracy of ROHC, regulate compression and decompressed state machine operating state and operator scheme separately rapidly, error diffusion and the packet loss propagation of adjacency grouped data prevented timely and effectively.
In order to realize the present invention's purpose, the embodiment of the invention has proposed a kind of method of the PDCP of lifting robustness header compression algorithm performance on the one hand, may further comprise the steps: decompressor end monitoring and statistical channel conditional information; When finding that channel condition surpasses predetermined threshold, decompressor end is carried out state transition and pattern conversion, and sends ACK or NACK to the compression end of the equipment of receiving and dispatching the ROHC compressed data packets, excites compression end to carry out state transition and pattern conversion.
The embodiment of the invention has also proposed a kind of data communications equipment on the other hand, comprises transceiver module, compression module and decompression module,
Described transceiver module is used for receiving and sending the ROHC compressed data packets;
Described compression module is used for packet is compressed;
Described decompression module, be used for the compressed data packets that receives is decompressed, monitoring simultaneously is the statistical channel conditional information also, when finding that channel condition surpasses predetermined threshold, described decompression module carries out state transition and pattern conversion, and send ACK or NACK to the compression end of the equipment of receiving and dispatching the ROHC compressed data packets, excite compression end to carry out state transition and pattern conversion.
Technical scheme according to the embodiments of the invention proposition, solve ROHC and just relied on the problem that these single means of ROHC decompressor end CRC check are carried out migration step by step and the pattern conversion of state, by introducing the standard of new judgement changes in channel conditions, improve sensitivity and the accuracy of ROHC, regulate compression and decompressed state machine operating state and operator scheme separately rapidly, error diffusion and the packet loss propagation of adjacency grouped data prevented timely and effectively.The technical scheme that embodiments of the invention propose, rationally efficient system resource, the optimization system performance used.In addition, the technical scheme that embodiments of the invention propose, very little to the change of existing system, can not influence the compatibility of system, and realize simple, efficient.
The aspect that the present invention adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or the additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
The schematic diagram that Fig. 1 leads to errors and propagates for packet loss;
Fig. 2 is the method flow diagram of the lifting PDCP robustness header compression algorithm performance of embodiment of the invention proposition;
Fig. 3 is the structural representation of data communications equipment;
Fig. 4 is the schematic diagram that utilizes the CQ guard against false to propagate;
Fig. 5 is the ROHC decompressor end operational flowchart under channel the becomes unstable situation;
Fig. 6 is the ROHC decompressor end operational flowchart under channel quality the becomes reliable situation.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein identical or similar label is represented identical or similar elements or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the present invention, and can not be interpreted as limitation of the present invention.
For the ease of understanding the present invention's purpose, below to ROHC should analyse in depth as further under wireless communications environment.Consider two kinds of typical scenes in the radio communication:
First kind of situation, owing to the error code reason that Radio Link causes, the decompress(ion) grouping that decompressor end can not be correct, CRC check failure.If the compressed package number of decompressor end CRC failure surpasses certain threshold value, then negative feedback NACK or SNACK are accumulated to a certain degree, can trigger the state machine two ends and carry out to the conversion of R pattern, so that again synchronously or set up new Context.
ROHC supports multiple profile such as IP/UDP/RTP.Table one is example with the compress mode ProfileIP of IP bag.
As can be seen from the table, if decompressor end is from a certain bag N1, CRC failure continuously, then slowly carry out the action of migration step by step that state reduces: FC-〉SC-〉NC, feedback NACK (O) or SNACK (O), if N9 bag CRC check is still failed under NC, the failure number surpasses certain threshold value (4) continuously, begin then to suppose that link condition is very bad, can't guarantee that follow-up compressed packet carries out stable propagation, current decompressor end Context might lose efficacy, and then feedback NACK (R), required two end state machines to carry out O-〉conversion of R pattern.Obviously, this processing policy is based on the mode of decompressor end self study, emergency response to the mistake bag is not prompt enough, have only through in continuous a plurality of compressed packet such as this example for N1-N9 under the situation of decompress(ion) mistake, can think that just current channel quality has begun to have worsened really, and then occur to the conversion of two-way stable R pattern, start Context inefficacy prevention mechanism, but cause Context to lose efficacy possibly, grouping causes chain reaction to subsequent compression, and mistake has obtained diffusion.
Table one: the negative feedback situation when the continuous CRC check of decompressor end is failed
Annotate: the IR bag is the initialization bag, contains static state and the dynamic part of setting up Context; DYN includes the dynamic part of setting up Context; UOR0, UOR1, UOR2 are U, O, dissimilar compressed package under three kinds of patterns of R.
Another situation, compression end has been operated in the FO/SO senior state, send the higher compressed package of compression ratio, if a certain moment plays Radio Link and becomes unreliable, compressed packet takes place to lose in a large number in transmission course, just may cause the Context of decompressor end and compression end inconsistent, namely this moment, Context lost efficacy.But because decompressor end can't be sent to compression end with feedback timely, and compression end does not receive that under two-way mode when feeding back, all are normal can to give tacit consent to decompressor end, still continues to send compression ratio than higher compressed package.
As shown in Figure 1, the schematic diagram that leads to errors and propagate for packet loss, under this shape, even the Radio Link packet loss reduces or packet loss no longer, owing to lose in abutting connection with the dynamic domain information of grouped data, for the subsequent compression bag that can successfully arrive decompressor end, i.e. Pkt (k) among the figure-Pkt (n), the context Context of decompressor end and compression end lose synchronously already, can't carry out the recovery of compressed package according to the information with continuous Changing Pattern before, cause the decompress(ion) failure.And because two ends are contextual asymmetric, this decompress(ion) failure will be recurred the compressed packet in follow-up arrival, has only repeatedly negative feedback NACK of the decompressor end of waiting until, compression end is carried out state gradually and is moved downwards under degenerative triggering, begin to send the update packet static and little compressible that multidate information is more complete and be IR/DYN when wrapping, could repair or rebuild Context, the normal cooperation that recovers compression and decompress(ion) at the state machine two ends.Yet the generation of packet loss phenomenon has caused the decompress(ion) failure of a plurality of subsequent packet.As seen, because the newly-built or renewal decompressor end Context fast that fails, the packet loss mistake has been carried out back-propagating.
In order to realize the present invention's purpose, embodiments of the invention have proposed a kind of method of the PDCP of lifting robustness header compression algorithm performance, may further comprise the steps: decompressor end monitoring and statistical channel conditional information; When finding that channel condition surpasses predetermined threshold, decompressor end is carried out state transition and pattern conversion, and sends ACK or NACK to the compression end of the equipment that receives the ROHC compressed data packets, excites compression end to carry out state transition and pattern conversion.
As shown in Figure 2, the method flow diagram of the lifting PDCP robustness header compression algorithm performance that proposes for the embodiment of the invention may further comprise the steps:
S101: decompressor end monitoring and statistical channel conditional information.
In step S101, in order to understand the quality of channel circumstance sensitive and accurately, in an embodiment of the present invention, decompressor end monitoring and statistical channel conditional information.
For example, the channel quality that (Radio Link Control, Radio Link control/MediumAccess Control, medium access control) dynamically provides according to RLC/MAC and a kind of possible implementation method that proposes.Channel quality can be by weighing below with reference to the factor, but be not limited thereto:
Average packet loss ratio PktLossRatio;
The average number of retransmissions HARQNum that mixes;
Average repeat time ARQNum.
These 3 parameters are mainly regularly added up with message mode by RLC/MAC, and for example 100ms reports to the PDCP entity, suppose to think that for PDCP the reliable or stable threshold value of channel quality is respectively: K1, K2 and K3;
Channel quality is designated as CQ, and CQ is (PktLossRatio, HARQNum, certain function ARQNum).
Particularly, for example, decompressor end monitoring and statistical channel conditional information may further comprise the steps:
The channel quality information that decompressor end dynamically provides according to rlc/mac layer, the following one or more channel factors of statistics and predetermined threshold compare:
Average packet loss ratio PktLossRatio, on average mix number of retransmissions HARQNum and average repeat time ARQNum.
More specifically, when following situation occurring, think that channel condition is lower than predetermined threshold one establishment, namely channel condition worsens:
The reliable threshold value of the channel quality of system's setting is respectively K1, K2 and K3;
Judge the value of channel quality CQ, when PktLossRatio＜K1, HARQNum＜K2 and ARQNum＜K3, CQ=TRUE, otherwise CQ=FALSE;
When the CQ value is FALSE, think that channel condition is lower than predetermined threshold one establishment.
When following situation occurring, think that channel condition is lower than predetermined threshold two establishments, namely channel condition improves:
The threshold value of the reliable number of times of channel quality of system's setting is K4;
When the CQ value is TURE K4 time, think that channel condition is lower than predetermined threshold two establishments.
S102: when finding changes in channel conditions, decompressor end is carried out state transition and pattern conversion, and notifies to make a start and carry out state transition and pattern conversion.
In step S102, according to the situation of the monitor channel conditions among the step S101, decompress and carry out corresponding state transition and pattern conversion.
For example, when finding that channel condition is lower than predetermined threshold one establishment, decompressor end is carried out state degradation and pattern conversion immediately, and sends NACK to the compression end of the equipment that receives the ROHC compressed data packets, excites compression end to carry out state degradation and pattern conversion.
Particularly, find that channel condition is lower than predetermined threshold one establishment and comprises:
When the CQ value was FALSE, described decompressor end judged that channel condition is lower than predetermined threshold one establishment.
Therefore, when finding that channel condition is lower than predetermined threshold one establishment, described decompressor end carries out the state degradation immediately and the pattern conversion comprises:
Described decompressor end is carried out state immediately and is degraded to NC, and the O pattern is changed to the R pattern, correspondingly, the compression end that receives the equipment of ROHC compressed data packets drops to minimum state IR with state, and make the O pattern to the conversion of R pattern, begin to send the IR compressed packet so that the context of in time synchronous decompressor end.
Correspondingly, decompressor end monitoring and statistical channel conditional information, when finding that channel condition is higher than predetermined threshold two establishments, decompressor end is carried out state upgrading and pattern conversion immediately, and send ACK to the compression end of the equipment of receiving and dispatching the ROHC compressed data packets, excite compression end to carry out state upgrading and pattern conversion.
Particularly, find that channel condition is higher than predetermined threshold two establishments and comprises:
The threshold value of the reliable number of times of channel quality of system's setting is K4;
When the CQ value was TURE K4 time, described decompressor end judged that channel condition is higher than predetermined threshold two establishments.
Therefore, when finding that channel condition is higher than predetermined threshold two establishments, described decompressor end carries out the state upgrading immediately and the pattern conversion comprises:
Described decompressor end carries out high state is arrived in transition between states immediately, and pattern is switched to the O pattern, and correspondingly, the compression end that receives the equipment of ROHC compressed data packets arrives high state with transition between states, and pattern is switched to the O pattern.
The said method that the present invention proposes, solve ROHC and just relied on the problem that these single means of ROHC decompressor end CRC check are carried out migration step by step and the pattern conversion of state, by introducing the standard of new judgement changes in channel conditions, improve sensitivity and the accuracy of ROHC, regulate compression and decompressed state machine operating state and operator scheme separately rapidly, error diffusion and the packet loss propagation of adjacency grouped data prevented timely and effectively.The said method that the present invention proposes, rationally efficient system resource, the optimization system performance used.In addition, the said method that the present invention proposes, very little to the change of existing system, can not influence the compatibility of system, and realize simple, efficient.
As shown in Figure 3, be the structural representation of data communications equipment 100, comprise transceiver module 110, compression module 120 and decompression module 130.
Wherein, transceiver module 110 is used for receiving and sending the ROHC compressed data packets; Compression module 120 is used for packet is compressed; Decompression module 130 is used for the compressed data packets that receives is decompressed, monitoring simultaneously is the statistical channel conditional information also, when finding that channel condition surpasses predetermined threshold, decompression module 130 carries out state transition and pattern conversion, and send ACK or NACK to the compression end of the equipment that receives the ROHC compressed data packets, excite compression end to carry out state transition and pattern conversion.
As the embodiment of the said equipment, decompression module 130 monitoring and statistical channel conditional information comprise:
The channel quality information that decompression module 130 dynamically provides according to rlc/mac layer, the following one or more channel factors of statistics and predetermined threshold compare:
Average packet loss ratio PktLossRatio, on average mix number of retransmissions HARQNum and average repeat time ARQNum;
The reliable threshold value of the channel quality of system's setting is respectively K1, K2 and K3;
Judge the value of channel quality CQ, when PktLossRatio＜K1, HARQNum＜K2 and ARQNum＜K3, CQ=TRUE, otherwise CQ=FALSE.
As the embodiment of the said equipment, when decompression module 130 judged that the CQ value is FALSE, decompression module 130 judged that channel condition is lower than predetermined threshold one establishment, and decompression module 130 carries out the conversion of state transition and pattern immediately and comprises:
Embodiment as the said equipment, when decompression module 130 finds that channel condition is higher than predetermined threshold two establishments: the threshold value of the reliable number of times of channel quality of system's setting is K4, when the CQ value was TURE K4 time, decompression module 130 carried out the conversion of state transition and pattern immediately and comprises:
The said equipment that the present invention proposes, solve ROHC and just relied on the problem that these single means of ROHC decompressor end CRC check are carried out migration step by step and the pattern conversion of state, by introducing the standard of new judgement changes in channel conditions, improve sensitivity and the accuracy of ROHC, regulate compression and decompressed state machine operating state and operator scheme separately rapidly, error diffusion and the packet loss propagation of adjacency grouped data prevented timely and effectively.The said equipment that the present invention proposes, rationally efficient system resource, the optimization system performance used.In addition, the said equipment that the present invention proposes, very little to the change of existing system, can not influence the compatibility of system, and realize simple, efficient.
As shown in Figure 4, the schematic diagram for utilizing the CQ guard against false to propagate.As shown in Figure 4, if when sending Pkt (i) from a certain moment compression end, wireless link environment begins to worsen, lower floor's real-time perception also in time reports the current channel quality factor of PDCP, and it is FALSE that PDCP calculates CQ, has begun the abundant judgment condition that worsens as channel circumstance, the ROHC decompressor end just can be carried out state immediately and was degraded to NC this moment, and impel the O pattern to the conversion of R pattern, and feedback NACK is to compression end and excite it to move accordingly, and handling process is seen accompanying drawing 5.
Fig. 5 is the ROHC decompressor end operational flowchart under channel the becomes unstable situation, is specially:
CQ is FALSE, and channel begins to worsen, and the decompressed state in the motor-driven attitude context of decompressed state progressively is down to NC from FC, SC.Behind the state degradation, decompressor end sends the negative feedback of respective type to compression end.If under the NC state, the current operator scheme of decompressor end is in the O pattern, then carries out R-〉conversion of the pattern of O, and send negative feedback NACK to compression end, inspire that compression end is carried out corresponding state degradation and pattern is changed.ROHC two condition machine is just worked under two-way reliable R pattern afterwards.
The compression end state drops to minimum state IR rapidly, begins to send the IR compressed packet so that the context of in time synchronous decompressor end; Two ends are transformed into the R pattern makes state machine inside adopt stricter operation mechanism, and more uses feedback mechanism that Context is upgraded and confirmed, to reduce the failure probability of compressive state machine and decompressed state machine context Context.Contrast accompanying drawing 1 utilizes CQ to adjudicate as can be seen, assurance early Context synchronously, make state machine skip very long relatively self study process of Pkt (k)-Pkt (n) stage, i.e. wrong communication process.As shown in Figure 4, when the back of channel quality improvement by the time sent to Pkt (k), decompressor end had the ability to recover this compressed packet fully, and gradually to high state and O mode shifts, to improve compression ratio, handling process is seen accompanying drawing 6.
Fig. 6 is the ROHC decompressor end operational flowchart under channel quality the becomes reliable situation, be specially: when the CQ continuous several times is TRUE, the ROHC decompressor end thinks that current channel is reliable, and the operating state in the motor-driven attitude context of decompression states transits to SC, FC from NC step by step.If the last successful decompress(ion) of decompressor end is crossed update package (IR/DYN bag), then carry out positive feedback, inspire compression end and carry out the packet that state upgrades to send high compression rate.If decompressor end current operator scheme under the FC state is in the R pattern, and the last successful decompress(ion) is crossed the UOR0 bag of a high compression rate, then carry out R-〉conversion of the pattern of O, and send positive feedback ACK to compression end, inspire that compression end is carried out corresponding state upgrading and pattern is changed.Compression end and decompressor end are just carried out data processing efficiently under the O of bidirectional optimistic pattern.
Therefore, the emergency response time to mistake bag and packet loss phenomenon has greatly been shortened in the introducing of CQ, has effectively shifted to an earlier date the prevention opportunity that mistake is propagated.
How the bag that the disclosed technical scheme of the embodiment of the invention, decompression states machine need not to lose by conjecture upgrades context, need not that also the mistake bag is made rational supposition and attempts revising context.But prevention is timely and effectively made in wireless link environment is worsened as early as possible, reduce to greatest extent by channel circumstance and worsen propagated that PDCP layer packet loss/mistake cause wrap, guarantee that the compressed packet that arrives subsequently can be guaranteed user's QOS as much as possible by correct decompressed.
One of ordinary skill in the art will appreciate that and realize that all or part of step that above-described embodiment method is carried is to instruct relevant hardware to finish by program, described program can be stored in a kind of computer-readable recording medium, this program comprises one of step or its combination of method embodiment when carrying out.
In addition, each functional unit in each embodiment of the present invention can be integrated in the processing module, also can be that the independent physics in each unit exists, and also can be integrated in the module two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, also can adopt the form of software function module to realize.If described integrated module realizes with the form of software function module and during as independently production marketing or use, also can be stored in the computer read/write memory medium.
The above-mentioned storage medium of mentioning can be read-only memory, disk or CD etc.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (12)
1. a method that promotes PDCP PDCP robustness header compression algorithm performance is characterized in that, may further comprise the steps:
Decompressor end monitoring and statistical channel conditional information, wherein, described decompressor end monitoring and statistical channel conditional information comprise:
The channel quality information that described decompressor end dynamically provides according to Radio Link control RLC/ media access control MAC layer, the following one or more channel factors of statistics are with predetermined threshold comparison: average packet loss ratio PktLossRatio, on average mix number of retransmissions HARQNum and average repeat time ARQNum;
When finding that channel condition surpasses predetermined threshold, decompressor end is carried out state transition and pattern conversion, and send affirmation ACK or deny that NACK to the compression end of the equipment of receiving and dispatching robustness head compression ROHC compressed data packets, excites compression end to carry out state transition and pattern conversion.
2. the method that promotes PDCP robustness header compression algorithm performance as claimed in claim 1 is characterized in that, described decompressor end monitoring and statistical channel conditional information further comprise:
The reliable threshold value of the channel quality of system's setting is respectively K1, K2 and K3;
Judge the value of channel quality CQ, when PktLossRatio＜K1, HARQNum＜K2 and ARQNum＜K3, CQ=TRUE, otherwise CQ=FALSE.
3. the method for lifting as claimed in claim 2 PDCP robustness header compression algorithm performance, it is characterized in that, when finding that channel condition is lower than predetermined threshold one establishment, decompressor end is carried out state degradation and pattern conversion immediately, and send NACK to the compression end of the equipment of receiving and dispatching the ROHC compressed data packets, excite compression end to carry out state degradation and pattern conversion.
4. the method for lifting PDCP robustness header compression algorithm performance as claimed in claim 3 is characterized in that, finds that channel condition is lower than predetermined threshold one establishment and comprises:
When the CQ value was FALSE, described decompressor end judged that channel condition is lower than predetermined threshold one establishment.
5. the method for lifting PDCP robustness header compression algorithm performance as claimed in claim 4 is characterized in that, when finding that channel condition is lower than predetermined threshold one establishment, described decompressor end carries out the state degradation immediately and the pattern conversion comprises:
Described decompressor end is carried out state immediately and is degraded to no compressed context NC state, and make bidirectional optimistic O pattern to two-way reliable R pattern conversion, correspondingly, the compression end of the equipment of transmitting-receiving ROHC compressed data packets drops to the minimum state initialization with state and refreshes IR, and make the O pattern to the conversion of R pattern, begin to send the IR compressed packet so that the context of in time synchronous decompressor end.
6. the method for lifting as claimed in claim 2 PDCP robustness header compression algorithm performance, it is characterized in that, described decompressor end monitoring and statistical channel conditional information, when finding that channel condition is higher than predetermined threshold two establishments, decompressor end is carried out state upgrading and pattern conversion immediately, and send ACK to the compression end of the equipment of receiving and dispatching the ROHC compressed data packets, excite compression end to carry out state upgrading and pattern conversion.
7. the method for lifting PDCP robustness header compression algorithm performance as claimed in claim 6 is characterized in that, finds that channel condition is higher than predetermined threshold two establishments and comprises:
The threshold value of the reliable number of times of channel quality of system's setting is K4;
When the CQ value was TURE K4 time, described decompressor end judged that channel condition is higher than predetermined threshold two establishments.
8. the method for lifting PDCP robustness header compression algorithm performance as claimed in claim 7 is characterized in that, when finding that channel condition is higher than predetermined threshold two establishments, described decompressor end carries out the state upgrading immediately and the pattern conversion comprises:
Described decompressor end switches to bidirectional optimistic O pattern with state transition to high state and with pattern immediately, and correspondingly, the compression end of the equipment of transmitting-receiving ROHC compressed data packets switches to the O pattern with state transition to high state and with pattern.
9. a data communications equipment is characterized in that, comprises transceiver module, compression module and decompression module,
Described transceiver module is used for receiving and sends the robustness head and compresses the ROHC compressed data packets;
Described compression module is used for packet is compressed;
Described decompression module, be used for the compressed data packets that receives is decompressed, monitoring simultaneously is the statistical channel conditional information also, when finding that channel condition surpasses predetermined threshold, described decompression module carries out the conversion of state transition and pattern, and sends ACK or NACK to the compression end of the equipment that receives the ROHC compressed data packets, excites compression end to carry out state transition and pattern conversion, wherein, described decompression module monitoring and statistical channel conditional information comprise:
The channel quality information that described decompression module dynamically provides according to Radio Link control RLC/ media access control MAC layer, the following one or more channel factors of statistics and predetermined threshold compare:
Average packet loss ratio PktLossRatio, on average mix number of retransmissions HARQNum and average repeat time ARQNum.
10. data communications equipment as claimed in claim 9 is characterized in that, described decompression module monitoring and statistical channel conditional information further comprise:
The reliable threshold value of the channel quality of system's setting is respectively K1, K2 and K3;
Judge the value of channel quality CQ, when PktLossRatio＜K1, HARQNum＜K2 and ARQNum＜K3, CQ=TRUE, otherwise CQ=FALSE.
11. data communications equipment as claimed in claim 10, it is characterized in that, when described decompression module judged that the CQ value is FALSE, described decompression module judged that channel condition is lower than predetermined threshold one establishment, and described decompression module carries out the conversion of state transition and pattern immediately and comprises:
Described decompression module carries out state immediately and is degraded to no context NC state, and make bidirectional optimistic O pattern to two-way reliable R pattern conversion, correspondingly, the compression end of the equipment of transmitting-receiving ROHC compressed data packets drops to the minimum state initialization with state and refreshes IR, and make the O pattern to the conversion of R pattern, begin to send the IR compressed packet so that the context of in time synchronous decompressor end.
12. data communications equipment as claimed in claim 10, it is characterized in that, when described decompression module finds that channel condition is higher than predetermined threshold two establishments: the threshold value of the reliable number of times of channel quality of system's setting is K4, when the CQ value was TURE K4 time, described decompression module carried out the conversion of state transition and pattern immediately and comprises:
Described decompression module arrives high state with transition between states immediately, and pattern is switched to bidirectional optimistic O pattern, and correspondingly, the compression end of the equipment of transmitting-receiving ROHC compressed data packets to high state, switches to O pattern with pattern with transition between states.
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| CN102215236B (en) * | 2011-06-13 | 2017-02-08 | 中兴通讯股份有限公司 | Working mode switching method and device of robust header compression protocol (ROHC) layer |
| CN102291774B (en) * | 2011-07-27 | 2017-09-26 | 中兴通讯股份有限公司 | Robust header compression method, compressor reducer and system |
| CN104427572B (en) * | 2013-09-10 | 2019-06-11 | 中兴通讯股份有限公司 | Packet data convergence protocol data packet processing method, device and communication system |
| CN105591711B (en) * | 2014-10-22 | 2019-12-03 | 中兴通讯股份有限公司 | The method and compressor that robustness header compression state is moved back |
| CN106856424A (en) * | 2015-12-09 | 2017-06-16 | 普天信息技术有限公司 | The ROHC message transmitting method for compressing and system in a kind of VOLTE systems |
| US10299163B2 (en) * | 2016-07-05 | 2019-05-21 | Mediatek Inc. | Enhancement on header compression |
| CN107645746B (en) * | 2016-07-20 | 2021-03-16 | 深圳市中兴微电子技术有限公司 | Context updating method, system and equipment |
| CN107801212A (en) * | 2017-10-17 | 2018-03-13 | 京信通信系统（中国）有限公司 | A kind of communication means and device |
| US10869224B2 (en) * | 2018-05-18 | 2020-12-15 | Apple Inc. | Fast synchronization of compressor state and decompression state in marginal wireless coverage |
| CN112218390A (en) * | 2019-07-10 | 2021-01-12 | 大唐移动通信设备有限公司 | Data processing method and device |
| CN111769914B (en) * | 2020-06-23 | 2023-05-02 | 芯象半导体科技(北京)有限公司 | Data communication method and storage medium |
| CN117715109A (en) * | 2020-11-24 | 2024-03-15 | 展讯半导体(成都)有限公司 | Communication processing method, device, apparatus and storage medium |
| CN114124350A (en) * | 2021-11-11 | 2022-03-01 | 弥达斯科技(深圳)有限公司 | Consensus algorithm for improving performance in network heterogeneous environment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1695384A (en) * | 2002-04-29 | 2005-11-09 | 摩托罗拉公司 | Method and apparatus to reduce uplink compressed mode monitoring in a communication device |
| CN101056402A (en) * | 2006-02-15 | 2007-10-17 | 宏正自动科技股份有限公司 | Image transmission system |
-
2009
- 2009-08-17 CN CN 200910091294 patent/CN101998438B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1695384A (en) * | 2002-04-29 | 2005-11-09 | 摩托罗拉公司 | Method and apparatus to reduce uplink compressed mode monitoring in a communication device |
| CN101056402A (en) * | 2006-02-15 | 2007-10-17 | 宏正自动科技股份有限公司 | Image transmission system |
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