CN102282809A - Method and apparatus for improving header compression performance - Google Patents

Method and apparatus for improving header compression performance Download PDF

Info

Publication number
CN102282809A
CN102282809A CN2009801150802A CN200980115080A CN102282809A CN 102282809 A CN102282809 A CN 102282809A CN 2009801150802 A CN2009801150802 A CN 2009801150802A CN 200980115080 A CN200980115080 A CN 200980115080A CN 102282809 A CN102282809 A CN 102282809A
Authority
CN
China
Prior art keywords
sliding window
preset
window width
acquisition
accuracy
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN2009801150802A
Other languages
Chinese (zh)
Other versions
CN102282809B (en
Inventor
沈海华
梁文亮
卢磊
黄罡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of CN102282809A publication Critical patent/CN102282809A/en
Application granted granted Critical
Publication of CN102282809B publication Critical patent/CN102282809B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/04—Protocols for data compression, e.g. ROHC
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/22—Parsing or analysis of headers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information

Abstract

A method for improving header compression performance, which includes: obtaining a wireless channel quality information (1); adjusting the width of the sliding windows according to the obtained wireless channel quality information and a preset information (2); compressing the header of the data packet according to the adjusted width of the sliding windows, and transmitting the compressed data packet to the decompression end (3). Application of the technical solutions can realize the purposes that the wireless channel bandwidth resource is saved and the correct decompressing ability of the decompression end is improved.

Description

Method and apparatus for improving header compression performance
A kind of method and apparatus for improving head compression performance
Technical field
The present invention relates to communication technical field, and in particular to a kind of method and apparatus of raising head compression performance.Background technology
Head compression technology is very important for the effect of communication technical field, can efficiently reduce the valuable bandwidth resources of data transfer occupancy, and current head compression technology mainly has IP header-compresseds（IPHC, IP Header Compression), RTP compression（CRTP, Compression of RTP), the head compression of robust（ROHC, Robust Header Compression) wherein, ROHC technologies are a kind of new header compression mechanisms, and compared with conventional various mechanism, ROHC technologies have good robustness and Geng Gao compression efficiency.
ROHC technologies use the least significant bit compressed encoding (W-LSB based on window to changing regular dynamic letter header field in the header of packet, Windows-based Least Significant Bits Encoding) algorithm, the algorithm is least significant bit compression（LBS, Least Significant Bits) algorithm improvement.Using W-LSB algorithms when compression end is encoded, it is to refer to base value according to one group included in sliding window, is encoded；Decompressor end receive sliding window any one base value can just be encoded with correct decompressed after value.It is the less header fields of changing value in coding those continuous bags using W-LSB algorithm codings, coded transmission is minimum k of field value, that is, what is transmitted is the less header fields of changing value.
Specific execution method using the compression end of W-LSB algorithm codings includes：
Step A1:Compression end sends a value V to decompressor end for the first time, and value V is added in sliding window by compression end, wherein, when compression end first time sending value V is to decompressor end, sliding window is sky；Step A2:Compression end is to follow-up each compressed value V, and according to k=max, ((v-min, v), (v_max v), obtains k to g to g to compression end;Wherein, v_max and v min are the maximum and minimum value of N number of reference value in sliding window, and function g (v) is the transmission value bit number to be transmitted compared with a certain reference value.
Step A3:According to the k of acquisition, value V is compressed, and transmits the value V after compression；Step A4:Compression end is according to the feedback of decompressor end, (or according to configuration of compression end itself), judge that in sliding window specific value V and all values older than V will not be decompressed end and be used as reference, value V and the old values of ratio V are then removed into sliding window, then the width of sliding window just diminishes accordingly. Wherein, sliding window width is the important parameter for evaluating robustness and compression efficiency using W-LSB algorithm codings.When sliding window very little, Lost loses a small amount of packet Shang wireless channel, and the packet that may result in subsequent transmission to decompressor end can not be successfully decompressed；If sliding window is very big, the LSB codings digit k of each compression domain will increase, and reduce the efficiency of head compression.Therefore, the above method also includes：Step A5:If compression end is according to the feedback of decompressor end, the feedback is typically that the error rate of decompressor end decompression is very high, then compression end just increases sliding window width.
Then use last time to decompress successfully value in decompressor end, as reference, to be decompressed.
In the research and practice process to prior art, the inventors found that, existing use W-LBS algorithms enter the technology of wardrobe compression, when being used in changeable wireless channel environment, sliding window change width is dumb, cause to waste bandwidth resources in the case of quality of wireless channel is preferable, in the case where quality of wireless channel is poor, it is impossible to ensure the accuracy of decompressor end decompression.
The content of the invention
The embodiment of the present invention provides a kind of method and apparatus for improving head compression performance, effectively solve sliding window change width in the prior art dumb, cause to waste bandwidth resources in the case of quality of wireless channel is preferable, in the case where quality of wireless channel is poor, it is impossible to the problem of ensureing the accuracy of decompressor end decompression.
The embodiments of the invention provide a kind of method for improving head compression performance, including：
Obtain quality of wireless channel information；
According to the quality of wireless channel information and preset information of the acquisition, sliding window width is adjusted；According to the sliding window width after adjustment, the header of packet is compressed, the packet after compression is sent to decompressor end.
The embodiment of the present invention additionally provides a kind of compression set, including：Acquiring unit, adjustment unit, compression unit and transmitting element,
The acquiring unit, for obtaining quality of wireless channel information；
The adjustment unit, for the quality of wireless channel information and preset information according to the acquisition, adjusts sliding window width；
The compression unit, for according to the sliding window width after adjustment, being compressed to the header of packet； The transmitting element, for the packet after compression to be sent into decompressor end.
The embodiment of the present invention is according to the quality of wireless channel information of acquisition, sliding window width is adjusted, according to the sliding window width after adjustment, the header of packet is compressed, packet after compression is sent to decompressor end, allow compression end according to quality of wireless channel, adjust after sliding window width, be compressed, improve efficiency of transmission, wireless signal-path band width resource has been saved, meanwhile, improve the correct decompression ability of decompressor end.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, the required accompanying drawing used in embodiment or description of the prior art will be briefly described below, apparently, drawings in the following description are only some embodiments of the present invention, for those of ordinary skill in the art, without having to pay creative labor, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of method flow sketch for raising head compression performance that the embodiment of the present invention one is provided；Fig. 2 is a kind of method flow sketch for raising head compression performance that the embodiment of the present invention two is provided；Fig. 3 is a kind of quality of wireless channel and sliding window width corresponding diagram illustrated in the embodiment of the present invention three；
Fig. 4 is a kind of compression set logic diagram illustrated in the embodiment of the present invention three；
Fig. 5 is a kind of method flow sketch for raising head compression performance that the embodiment of the present invention four is provided；Fig. 6 is a kind of compression set logic diagram that the embodiment of the present invention five is provided.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention.
The embodiment of the present invention provides a kind of method for improving head compression performance, and the embodiment of the present invention also provides corresponding device.It is described in detail individually below.Embodiment one,
The embodiments of the invention provide a kind of method for improving head compression performance, shown in Figure 1, this method includes： Step 1:Obtain quality of wireless channel information；
, wherein it is desired to understand, the representation of quality of wireless channel information can have a variety of, can generally use the ratio between carrier wave and interference noise（CINR, Carrier-to-Interference-and-Noise Ratio), signal to noise ratio（SNR, Signal to Noise Ratio), received signal strength indicator（RSSI, Received Signal Indicator) any of which represents, for using HARQ（ARQ, Automatic Repeat Request) or hybrid automatic repeat-request (HARQ, Hybrid Automatic Repeat Request) technology, quality of wireless channel information can also be represented with the accuracy of transmission data.It is also to be appreciated that the representation of quality of wireless channel information can have a variety of, explanation herein should not be construed the limitation to the embodiment of the present invention.
Step 2:Just blunt quality of wireless channel information and preset information according to acquisition, adjusts compression end sliding window width；
The explanation readily appreciated, in the case that usual quality of wireless channel is poor, the width of sliding window is relative wider in the case of preferable with quality of wireless channel, the sliding window width for increasing compression end is needed to n, the bit number increase transmitted accordingly, accordingly, probability increase of the reference value that decompressor end is used in window, the compressed package of subsequent transmission can be correctly decompressed during so as to Lost bags rates or more wrong bag, and there is provided correct decompression ability.
In the case of quality of wireless channel is preferable, the bit number that the width of sliding window is decreased to transmit after width m, compression is few, can not only improve efficiency of transmission, can also save wireless signal-path band width resource.
It should also be noted that, width m and n are variable, specific value is determined according to actual conditions.Adjustment of the compression end to sliding window width can also be with specific reference to the division quantitative to quality of wireless channel, and sliding window width is divided into multiple different width.Illustrate referring to the embodiment subsequently illustrated.
Step 3:According to the sliding window width after adjustment, the header of packet is compressed, the packet after compression is sent to decompressor end.
Wherein, illustrating in step 3 may be referred to prior art.
If above-mentioned compression end is located in user equipment, it is considered that the above method is by user equipment（Such as terminal）Perform.When compression end is located in user equipment, it is sometimes desirable to ustomer premises access equipment and network side（Typically network side base station）Between consult about compress parameter, such as parameter：Threshold value X, the channel quality of bad channel quality good threshold value Y, and/or channel quality proof cycle Τ etc..This negotiations process can be with Pass through user's basic capability negotiating（SBC), dynamic Service adds/change（DSA/DSC, Dynamic service addition/change) ^ registration (REG, registration) etc. signaling completes.
To a kind of explanation for the method for improving head compression performance provided in an embodiment of the present invention more than, according to the quality of wireless channel information of acquisition, adjust sliding window width, according to the sliding window width after adjustment, the header of packet is compressed, packet after compression is sent to decompressor end, compression end allow according to quality of wireless channel, adjust after sliding window width, it is compressed, improves efficiency of transmission, saved wireless signal-path band width resource, meanwhile, improve the correct decompression ability of decompressor end.Embodiment two,
The embodiments of the invention provide a kind of method for improving head compression performance, this method is a more detailed implementation process based on the method for the offer of embodiment one., it is necessary to which explanation, the executive agent of this method is ustomer premises access equipment, compression end is included in the ustomer premises access equipment, shown in Figure 2, this method includes before being explained to the method that the present embodiment is provided：
Step HI:Obtain the wherein any one parameter value such as up CINR, SNR or RSSI；Wherein, ustomer premises access equipment can be the uplink scheduling information that is sent according to network side or according to the wherein any one data such as descending CINR, SNR or RSSI, estimate the wherein any one data such as up CINR, SNR or RSSI；Or the wherein any one data such as up CINR, SNR or RSSI are directly received from network side.
It is also to be appreciated that in existing communication mechanism, ustomer premises access equipment can regularly report the wherein any one data such as descending CINR, SNR or RSSI to network side.
For the ease of to description, below explained by taking CINR as an example in all word, the situation that quality of wireless channel is represented with SNR or RSSI etc. replaces CINR with SNR or RSSI.
Step H2:Wherein any one data and preset information such as up CINR, SNR or RSSI according to acquisition, adjust compression end sliding window width；
Wherein, preset information described in step H2, is generally included：Threshold value X, the channel quality of bad channel quality good threshold value Y, channel quality detection cycle Τ;It can also include in preset information：Adjust the occurrence of sliding window width.Other specification can also be included in preset information, the limitation to the embodiment of the present invention is should not be construed herein.
It should also be noted that, step Η 2 can be specifically included： Step hi:When the CINR values of acquisition are less than preset value X, according to preset information, compression end sliding window width is increased into n;
Wherein, n can be in preset information it has been specified that, when CINR values are less than X, window width increases to n, and n specific value the factor such as requires according to actual conditions and designer and determined.When CINR values are less than X, illustrate that now quality of wireless channel is poor, it is necessary to which the width of sliding window is increased, it is ensured that the accuracy of decompressor end decompression.
Step h2:When the CINR values of acquisition are more than or equal to X and are less than or equal to Y, keep sliding window width constant；
Wherein, when CINR values size between x and y, illustrate that current sliding window width is suitable, you can to ensure the decompression accuracy of decompressor end, by there is no waste bandwidth resource, it is not necessary to be adjusted.
Step h3:When the CINR values of acquisition are more than Y, according to preset information, compression end sliding window width is decreased to m.
Wherein, m has similar explanation to the n in step hi, when CINR values are more than Y, illustrates that now quality of wireless channel is preferably, can reduce window width, transmit less bit number, save bandwidth resources.
Above step hi to step h3 explanation be for decompressor end feedback-less or feed back it is less in the case of, user equipment is according to the quality of quality of wireless channel, sliding window width in adjustment compression end.In fact, more reasonably in adjustment compression end in the method for sliding window width, it is also contemplated that the feedback information of decompressor end, such as：The accuracy of decompression or the error rate any of which of decompression.
When there is feedback, this method will also include before step H2：
Step H4:The feedback information that decompressor end is sent is received, the feedback information includes NACK or the ACK feedbacks that the decompressor end is decompressed to packet；
Step H5:According to feedback information, the accuracy of decompression is obtained.
The specific method for obtaining accuracy is prior art, is not described in detail.In the case of having feedback in subsequent embodiment three, four, there is similar explanation, may be referred to described herein as.
Therefore, step H2 can also be specifically included：Wherein any one data, the preset information such as up CINR, SNR or RSSI according to acquisition conciliate compressing feedback information, adjust compression end sliding window width.
With reference to above-mentioned steps hi to step h3 to have decompression feedback information in the case of, adjustment sliding window it is wide The specific method of degree is explained, including：
Step h, l:When the CINR values of acquisition are less than X, and the accuracy of decompression is low（Similarly, error rate is high）, according to preset information, compression end sliding window width is increased into n;
Wherein, the height of the accuracy of decompression（Or, the height of error rate）Judgement, can be specifically accuracy then thinks high more than Z, then thinks low less than or equal to Z, depending on Z value is according to actual conditions, same to X, Y, m, n-sample are preset in compression end.
Understand that quality of wireless channel is poor by step h, l, and the accuracy of decompressor end decompression is relatively low, then compression end is judged to need to increase window width to ensure the accuracy of decompressor end decompression.
Step h, 2:When the CINR values of acquisition are less than X, and the accuracy of decompression is high, then keeps sliding window width constant；
Wherein, step h, 2 explanations, in the case where decompressor end decompression accuracy is higher, although quality of wireless channel is poor, it is not required that increase window width, has saved bandwidth resources.
Step h'3:It is identical with step h2；
Step h, 4:When the CINR values of acquisition are more than Y, and the accuracy of decompression is low, then keeps sliding window width constant；
Step h, 5:When the CINR values of acquisition are more than Y, and the accuracy of decompression is high, then according to preset information, compression end sliding window width is decreased to m.
Pass through above step h, l to step h, 5 explanation（Do not show in fig. 2）So that the adjustment to sliding window width is more reasonable.It should also be appreciated that when, for this method of adjustment, then step HI is specifically included：The wherein any one data such as up CINR, SNR or RSSI are obtained, and obtain the feedback information of decompressor end.
Step H3:According to the window width changed after adjustment, packet header is compressed the packet after compression is sent to decompressor end；
Wherein, before being illustrated to step H3, it is to be understood that：For in head compression technology as defined in ROHC agreements, LSB compression algorithms are that coding is compressed to the continuous domain of continuous packet intermediate value change, and compression method is k least significant bit bit for transmitting thresholding（LSBs, Least Significant Bits), rather than transmit original thresholding.LSBs is the value V to be compressed and has been decompressed the least significant bit for rectifying really decompression and the binary coding difference as reference value v-ref, and k is LSBs number of bits.Decompression termination Receive after LSBs, be previously properly received with its substitution and as the k least significant bit for the v-ref for decompressing reference value, reduce the value compressed.
Bag form uses type in current ROHC（Type) mechanism, corresponding limitation has been made to the form of packet i.e. in ROHC, selected after certain type, the bit number of its information transmitted is fixed, therefore, calculate the k obtained and be necessarily less than the bit number kl transmitted in the bag form of selected type.
Based on above-mentioned conceptual explanation, step H3 is illustrated below：
Step tl:When compression end sliding window width increases to n, according to window width, least significant digit k is obtained,；
Step t2:According to current packet format Type, judge that the bit data kl of current packet format Type transmission is more than or equal to k', then using current packet format Type transmission data；
Step t3:According to current packet format Type, judge that the bit data kl of current packet format Type transmission is less than k', then select the bit number of transmission to be more than k' packet format Type transmission data；
Wherein, when having multiple selectable types in step t3, selection transmitted bit number is minimum, and the packet format Type more than k' is transmitted.
Above-mentioned steps tl to step t3 be directed to by sliding window width increase under conditions of, the subsequent treatment of compression end；Below step t4 to step t6 be directed to by sliding window width reduce under conditions of, the subsequent treatment of compression end.
Stept4:It is similar to step tl, when compression end sliding window width is decreased to m, according to window width, obtain least significant digit k ";
Step t5:Data are transmitted according to former packet format Type.
Wherein, the k " obtained in step t4 is clearly the bit number kl for being less than former packet format Type transmission, it is possible to performs step t5 operation, does not change packet format Type.It is of course also possible to be transmitted according to new packet format Type, that is, the bit number of transmission is selected to be more than or equal to k ", and the packet format Type smaller than the bit number kl that former packet format Type is transmitted.
To a kind of explanation for the method for improving head compression performance provided in an embodiment of the present invention more than, according to the quality of wireless channel information of acquisition, sliding window width is adjusted, according to the sliding window width after adjustment, packet header is compressed, packet after compression is sent to decompressor end, allow compression end according to quality of wireless channel, adjust after sliding window width, be compressed, efficiency of transmission is improved, is saved Wireless signal-path band width resource, meanwhile, improve the correct decompression ability of decompressor end.
Embodiment three,
The embodiments of the invention provide a kind of method for improving head compression performance, this method is similar to the method for implementing to provide in two, and difference is, is a kind of simple rough process to the adjustment of sliding window width in embodiment two；And be that comparison is fine to the adjustment of sliding window width in the method that the present embodiment is provided.
When being explained to the method that the present embodiment is provided, just do not elaborated with embodiment something in common, main pair illustrates with part of being had any different in embodiment two.Difference in method and embodiment two that the present embodiment is provided step H2 concrete operation step, in the step H2 in embodiment two, by quality of wireless channel quantify to be divided into three parts, i.e. quality of wireless channel good, general, bad.When CINR is more than Y, quality of wireless channel is good；When CINR is less than or equal to bifurcation and is more than or equal to X, quality of wireless channel is general；When CINR is less than X, quality of wireless channel is poor.Accordingly, the width of sliding window is divided into three kinds, including：Keep current sliding window width, width is m and width is n.
And in the present embodiment, more than three part is divided into by what quality of wireless channel was quantified, when representing quality of wireless channel with this kind of parameter such as CINR, SNR, RSSI, value that can be according to each parameter on number axis, unlimited channel quality correspondence compression end sliding window broadband representated by the value that number axis is divided into more than three intervals, different intervals is different.Certain principle is all that channel quality is better, and sliding window width is narrower.As shown in figure 3, by taking CINR as an example, CINR values are divided into 7 sections.CINR parameter value V A, correspondence sliding window width Nl; A<V B, sliding window width N2; B<V C, sliding window width N3; C<V <D, sliding window width N4; D<V E, sliding window width N5; E<V F, sliding window width N6; V>F, sliding window width N7, the above is divided to CINR and corresponding sliding window width value is information preset in compression end.Compression end is according to the specific parameter values of CINR of acquisition, and above-mentioned preset information in ustomer premises access equipment, and the width of compression end sliding window is made corresponding adjustment by ustomer premises access equipment.It should also be noted that, similar to the explanation in embodiment two on step H2, the adjustment to sliding window width is it is also contemplated that the feedback information of decompressor end, illustrates the explanation that may be referred in embodiment two.
It can further be stated that, in practical application, compression end obtains quality of wireless channel information, refer specifically to obtain any one such as CINR, SNR or RSSI, the design parameter value obtained in different time is different, it therefore, it can the foundation using quality of wireless channel in time T as adjustment window width.Therefore, quality of wireless channel information is obtained in the present embodiment to specifically include： Step yl:Acquisition CINR parameter values in defined time T more than once；
Step y2：Statistics CINR values in time T fall into preset each interval number；
Then according to the most interval of the parameter value number fallen into, and preset information, selection and the interval corresponding sliding window width.If most interval more than one, the worst interval of selection channel quality of the parameter value fallen into, is used as the foundation of adjustment sliding window width.
Described above is that by taking CINR as an example, have identical operating method for SNR, RSSI.
For the ease of understanding the above-mentioned explanation to step yl and step y2, concrete example includes：Assuming that in the time
User equipment has the estimation of 10 CINR values in T, wherein, CINR values have 8 intervals for falling into 4 to 8dB,
The interval for falling into -4 to OdB 2 times, then compression end is used as the foundation for adjusting sliding window width using 4 to 8dB interval in user equipment.Another citing includes：Such as CINR parameter values have 5 intervals for falling into 4 to 8dB,
Fall into -4 to OdB 5 times, then compression end is used as the foundation for adjusting sliding window width using -4 to OdB interval in user equipment.
Described above is that, when decompressor end is by feeding back, the method that compression end specifically adjusts sliding window width is as follows for the adjustment in the case of without decompressor end feedback information：
When the accuracy of decompression is more than preset value Z, and the numerical value in the most interval of parameter value number that falls into currently obtained is more than the last numerical value fallen into the most interval of parameter value number obtained, then by the sliding window width corresponding to sliding window width adjustment to the interval most with the parameter value number fallen into；
When the accuracy of decompression is less than or equal to preset value Z, and the numerical value in the most interval of parameter value number that falls into currently obtained is less than the last numerical value fallen into the most interval of parameter value number obtained, then by the sliding window width corresponding to sliding window width adjustment to the interval most with the parameter value number fallen into；
When the accuracy of decompression is more than preset value Z, and the numerical value in most interval of parameter value number that falls into currently obtained is less than the last numerical value fallen into most interval of parameter value number obtained, then keeps current sliding window width；
When the accuracy of decompression is less than or equal to preset value Z, and the numerical value in most interval of parameter value number that falls into currently obtained is more than the last numerical value fallen into most interval of parameter value number obtained, then keeps current sliding window width. The explanation of all of above embodiment of the present invention one, two, three is included in what situation in ustomer premises access equipment was explained both for compression end, in fact, compression end can also be located at network side, compression end is located at network side equipment such as gateway（Gateway in).It is similar with the method that embodiment one, two, three is provided, difference is, what network side was obtained is the information of downlink wireless channel quality, these information are typically what is sent by user equipment, network side is got after descending CINR, SNR or RSSI, judge whether to need to adjust compression end sliding window width, if it is desired, then any of which such as CINR, SNR or RSSI item is sent to the compression end of network side by network side.Follow-up operating procedure is identical in user terminal with compression end, may be referred to the explanation in embodiment one, two, three.
It should also be noted that, as shown in figure 4, when quality of wireless channel is represented with any of which such as CINR, SNR or RSSI item, the characteristics of all specifically similar in above-described embodiment one, two, three：Any of which such as CINR, SNR or RSSI are obtained in the physical layer block of its equipment, then by any of which such as CINR, SNR or RSSI of acquisition, pass through distinctive signal（Such as service primitive）Compressor reducer is sent to, according to the information of acquisition in compressor reducer, and preset information adjustment sliding window width；Packet header is compressed according to the sliding window width after adjustment, the packet after compression is passed into output equipment by physical layer block.
Example IV,
The embodiment of the present invention provides a kind of method for improving head compression performance, and the present embodiment is similar to the aforementioned embodiment, and difference is, the parameter that quality of wireless channel is characterized in the present embodiment is not CINR etc, and quality.
Generally, when ustomer premises access equipment networks, some parameters are consulted with network side, the negotiation can be completed by signalings such as SBC, DSA/DSC, REG.The parameter of negotiation is generally included：Error rate when channel quality is good（Or accuracy）Threshold value XI, error rate during bad channel quality（Or accuracy）Threshold value Yl, channel quality detection cycle Τ.Parameter XI, Υ 1, Τ specific value are it is also assumed that pre-set in ustomer premises access equipment.
The method that the present embodiment is provided is illustrated below, as shown in figure 5, this method includes：
Step K1:NACK or ack signal any of which that receiving terminal is sent are received, wherein, include decompressor end in the receiving terminal； Wherein, for the technical scheme using ARQ technical transmissions, receiving terminal can be verified after data are received to packet, and according to then feeding back ACK signal is verified successfully, verification failure then feeds back NACK signal to transmitting terminal；For the technical scheme using HARQ technologies, receiving terminal receives after data, packet is decoded, successfully decoded feeding back ACK, and decoding unsuccessfully feeds back NACK signal to transmitting terminal.
Step K2:According to the NACK or ack signal any of which received, the accuracy or error rate any of which of transmission data are obtained；
Wherein, first explained for illustrating for step K2 by taking error rate as an example, obtaining the method for error rate can be：
When using ARQ technologies, transmitting terminal is counted in defined time T to NACK signal, and calculates block sequence number being fed back to NACK signal, having sent（BSN, Block Sequence Number) number, account for the ratio of all BSN numbers sent in time T.Wherein, block（Block) the smallest particles to be transmitted in ARQ technologies.
When using HARQ technologies, transmitting terminal is counted in defined time T to NACK signal, and calculates HARQ bag numbers being fed back to NACK signal, having sent, accounts for the ratio of all HARQ bags numbers sent in time T.Wherein, HARQ bags are the smallest particles that transmits in HARQ technologies.
Above-mentioned is the concrete operation method for obtaining error rate, can be with the unquestionable operating method for deriving acquisition accuracy.
Step K3:According to the accuracy of the transmission data of acquisition or error rate any of which, and preset information, sliding window width is adjusted；
Wherein, the explanation that may be referred in embodiment two on step H2 is illustrated for step K3, wherein, the value of accuracy or error rate equivalent to parameter CINR in embodiment two in step K3, XI, Y1 and T in preset information, effect with X, Y and T in embodiment two is for identical, and the broadband of the window of adjustment can be ml, nl;When there is decompressor end feedback, then the basis for estimation of the accuracy decompressed can be Z1, and the effect specifically acted in embodiment two is identical, therefore, it can obviously draw the specific operation process to adjusting sliding window width.No longer repeat herein.
Step K4:It is similar to step H3 in embodiment two, according to the window width changed after adjustment, the header of packet is compressed the packet after compression is sent to decompressor end.
Wherein, step K4 detailed description may be referred to the explanation in embodiment two. Only it is responsible for receiving and occurring data it should also be noted that, being different from physical layer block in above-described embodiment one, two, three, the present embodiment, the function without judgement, in the present embodiment including medium education（MAC, Media Access Control) module, above-mentioned steps K2 is performed in the module;The accuracy or error rate of acquisition are sent to compressor reducer by MAC modules, and step K3 is performed in compressor reducer.
To a kind of explanation for the method for improving head compression performance provided in an embodiment of the present invention more than, with the accuracy or error rate any of which of transmission data, to reflect quality of wireless channel situation, and then adjust sliding window width, according to the sliding window width after adjustment, the header of packet is compressed, packet after compression is sent to decompressor end, compression end allow according to quality of wireless channel, adjust after sliding window width, it is compressed, improve efficiency of transmission, wireless signal-path band width resource is saved, simultaneously, improve the correct decompression ability of decompressor end.Embodiment five,
The embodiment of the present invention provides a kind of compression set, and shown in Figure 6, the compression set includes：Acquiring unit 10, adjustment unit 20, compression unit 30 and transmitting element 40.
Wherein, acquiring unit 10, for obtaining quality of wireless channel information；
Adjustment unit 20, for the quality of wireless channel information and preset information according to acquisition, adjusts compression end sliding window width；
Compression unit 30, for according to the sliding window width after adjustment, being compressed to IP letter heads；Transmitting element 40, for giving decompressor end by the IP letter hairs after compression.
Wherein, the quality of wireless channel information obtained in acquiring unit 10 can be CINR, SNR, RSSL or the accuracy using transmission data when ARQ, HARQ technology（Or error rate）Any of which is represented.Therefore, acquiring unit 10 can be the specific accuracy for being used for obtaining CINR, SNR, RSSL or using ARQ, HARQ technical transmission data（Or error rate）The value of any of which.
Optionally, for method illustrated in such as embodiment three, accordingly, acquiring unit 10 can also include：First acquisition unit 101 and statistic unit 102.
Wherein, first acquisition unit 101, for obtained in defined time T CINR more than once,
The value of SNR, RSSI any of which；
Statistic unit 102, the value for counting CINR, SNR, RSSI any of which in time T falls into preset each interval number； The then adjustment unit 20, specifically for according to statistical result and preset information, adjusting compression end sliding window width.
Optionally, for method illustrated in such as example IV, accordingly, the compression set can also include：First receiving unit 50, NACK or ack signal any of which for receiving decompressor end transmission
Then acquiring unit 10, specifically for according to the NACK or ack signal any of which received, obtaining the accuracy or error rate any of which of transmission data；Wherein, the accuracy or error rate of above-mentioned transmission data are quality of wireless channel information.
Optionally, for method illustrated in such as embodiment two, accordingly, adjustment unit 20 is specifically for when the CINR values of acquisition are less than X, according to preset information, n is increased to by compression end sliding window width;When the CINR values of acquisition are more than or equal to X and are less than or equal to Y, keep sliding window width constant；When the CINR values of acquisition are more than Y, according to preset information, compression end sliding window width is decreased to m.
Above-mentioned adjustment unit 20 does not account for the feedback of decompressor end when performing adjustment, if the compression set also includes：Second receiving unit 60, the feedback information for receiving decompressor end；
Then above-mentioned adjustment unit 20 can also be specifically included：When the CINR values of acquisition are less than X, and the accuracy of decompression is less than or equal to Z, and according to preset information, compression end sliding window width is increased into n;When the CINR values of acquisition are less than X, and the accuracy of decompression is more than Z, then keeps sliding window width constant；When the CINR values of acquisition are more than or equal to X and are less than or equal to Y, keep sliding window width constant；When the CINR values of acquisition are more than Y, and the accuracy of decompression is less than or equal to Z, then keeps sliding window width constant；When the CINR values of acquisition are more than Y, and the accuracy of decompression is more than Z, then according to preset information, compression end sliding window width is decreased to m.
Wherein, above-mentioned CINR values can have SNR value, RSSI value or the accuracy value wherein any one using transmission data when ARQ, HARQ technology to replace.
Optionally, for method illustrated in such as embodiment two, accordingly, compression unit 30 can also include：Obtain least significant bit counting unit 301 and the first compression unit 302.
Wherein, least significant bit counting unit 301 is obtained, for according to the adjustment result to sliding window width, obtaining least significant digit k';
First compression unit 302, for the least significant digit k according to acquisition, and current packet format Type Data are compressed by the bit data kl of transmission.
It should be noted that can specifically include in the first compression unit 302：
If compression end sliding window width increases to n, the least significant digit of acquisition is k, when, and judge that the bit data kl of current packet format Type transmission is more than k', then using current packet format Type transmission data；
If compression end sliding window width increases to n, the least significant digit of acquisition is k, when, and judge that the bit data kl of current packet format Type transmission is less than k', then select the bit number of transmission to be more than k' packet format Type transmission data；
If compression end sliding window width is decreased to m, when acquisition least significant digit is k ", then data are transmitted according to former packet format Type.It is of course also possible to be transmitted according to new packet format Type, that is, the bit number of transmission is selected to be more than or equal to k ", and the packet format Type smaller than the bit number kl that former packet format Type is transmitted.
To a kind of explanation of compression set provided in an embodiment of the present invention more than, according to the quality of wireless channel information of acquisition, adjust sliding window width, according to the sliding window width after adjustment, the header of packet is compressed, packet after compression is sent to decompressor end, compression end allow according to quality of wireless channel, adjust after sliding window width, it is compressed, improves efficiency of transmission, saved wireless signal-path band width resource, meanwhile, improve the correct decompression ability of decompressor end.One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment can be by program to instruct the hardware of correlation to complete, the program can be stored in a computer-readable recording medium, and storage medium can include：ROM, RAM, disk or CD etc..
The explanation that the method and compression set of the raising head compression performance provided above the embodiment of the present invention carry out above example is only intended to the method and its core concept for helping to understand the present invention；Simultaneously for those of ordinary skill in the art, according to the thought of the present invention, it will change in specific embodiments and applications, in summary, this specification content should not be construed as limiting the invention.

Claims (1)

  1. Claim
    1st, a kind of method for improving head compression performance, it is characterised in that including：
    Obtain quality of wireless channel information；
    According to the quality of wireless channel information and preset information of the acquisition, sliding window width is adjusted；According to the sliding window width after adjustment, the header of packet is compressed, the packet after compression is sent to decompressor end.
    2nd, according to the method described in claim 1, it is characterised in that the acquisition quality of wireless channel information is specifically included：
    Obtain the ratio between carrier wave and interference noise CINR, signal to noise ratio snr, the parameter value of received signal strength indicator RSSI wherein any one；
    The quality of wireless channel information and preset information according to the acquisition, adjustment sliding window width is specifically included：According to the parameter value and preset information of CINR, SNR or RSSI of acquisition wherein any one, the sliding window width is adjusted.
    3rd, method according to claim 2, it is characterised in that described CINR, SNR or RSSI according to the acquisition wherein parameter value of any one and preset information, adjustment compression end sliding window width is specifically included：
    When the parameter value of CINR, SNR or RSSI wherein any one of the acquisition is less than preset value X, sliding window width is increased to preset width n;
    When the parameter value of CINR, SNR or RSSI wherein any one of the acquisition is more than or equal to the preset value X and during less than or equal to the preset value Y, keep sliding window width constant；
    When the parameter value of CINR, SNR or RSSI wherein any one of the acquisition is more than the Y, sliding window width is decreased to preset width m.
    4th, before method according to claim 2, it is characterised in that the quality of wireless channel information and preset information according to acquisition, adjustment sliding window width, methods described also includes：
    The feedback information that decompressor end is sent is received, the feedback information includes NACK or the ACK feedbacks that the decompressor end is decompressed to packet；
    According to the feedback information, the accuracy of decompression is obtained；
    Then described CINR, SNR or RSSI according to acquisition wherein parameter values of any one and preset Information, adjustment compression end sliding window width is specifically included：
    When the parameter value of CINR, SNR or RSSI wherein any one of the acquisition is less than preset value X, and the accuracy of decompression is less than or equal to preset value Z, and sliding window width is increased to preset width n;
    When the parameter value of CINR, SNR or RSSI wherein any one of the acquisition is less than preset value
    During X, and the accuracy of decompression is more than preset value Z, keeps current sliding window width；
    When the parameter value of CINR, SNR or RSSI wherein any one of the acquisition is more than or equal to the preset value X and during less than or equal to the preset value Y, current sliding window width is kept；
    When the acquisition CINR, SNR or RSSI wherein any one parameter value be more than the Y, and decompression accuracy be more than preset value Z, sliding window width is decreased to preset width m;When the parameter value of CINR, SNR or RSSI wherein any one of the acquisition is more than the Y, and the accuracy of decompression is less than or equal to preset value Z, keeps current sliding window width.
    5th, according to the method described in claim 1, it is characterised in that the acquisition quality of wireless channel information is specifically included：
    The parameter value of acquisition CINR, SNR or RSSI wherein any one in preset time T more than once；
    The parameter value of CINR, SNR or RSSI wherein any one in the preset time T is counted, preset each interval number, preset each interval expression quality of wireless channel information is fallen into；
    Then the quality of wireless channel information and preset information according to the acquisition, adjusts sliding window width and specifically includes：The information of sliding window width according to corresponding to the most interval of the most interval and preset and parameter value number fallen into of the parameter value number fallen into, adjusts sliding window width.
    6th, before method according to claim 5, it is characterised in that the quality of wireless channel information and preset information according to acquisition, adjustment sliding window width, methods described also includes：
    The feedback information that decompressor end is sent is received, the feedback information includes NACK or the ACK feedbacks that the decompressor end is decompressed to packet；
    According to the feedback information, the accuracy of decompression is obtained；
    The information of sliding window width corresponding to the most interval of the interval and preset and parameter value number fallen into of the parameter value number that then basis is fallen at most, adjusts sliding window width, specifically Including：
    When the accuracy of decompression is more than preset value Z, and the numerical value in the most interval of parameter value number that falls into currently obtained is more than the last numerical value fallen into the most interval of parameter value number obtained, then by the sliding window width corresponding to sliding window width adjustment to the interval most with the parameter value number fallen into；
    When the accuracy of decompression is less than or equal to preset value Z, and the numerical value in the most interval of parameter value number that falls into currently obtained is less than the last numerical value fallen into the most interval of parameter value number obtained, then by the sliding window width corresponding to sliding window width adjustment to the interval most with the parameter value number fallen into；
    When the accuracy of decompression is more than preset value Z, and the numerical value in most interval of parameter value number that falls into currently obtained is less than the last numerical value fallen into most interval of parameter value number obtained, then keeps current sliding window width；
    When the accuracy of decompression is less than or equal to preset value Z, and the numerical value in most interval of parameter value number that falls into currently obtained is more than the last numerical value fallen into most interval of parameter value number obtained, then keeps current sliding window width.
    7th, according to the method described in claim 1, it is characterized in that, when being communicated using HARQ (ARQ) or hybrid automatic repeat-request (HARQ) technology, the acquisition quality of wireless channel information is specifically included：
    NACK or ack signal any of which that receiving terminal is sent are received, the receiving terminal includes decompressor end；
    According to the NACK or ack signal any of which received, the accuracy or error rate any of which of transmission data are obtained, accuracy or the error rate any of which represents quality of wireless channel；
    Then the quality of wireless channel information and preset information according to the acquisition, adjusts sliding window width and specifically includes：According to the accuracy of the transmission data of the acquisition or error rate any of which and preset information, sliding window width is adjusted.
    8th, method according to claim 7, it is characterised in that the accuracy or error rate any of which and preset information of the transmission data according to acquisition, adjusts sliding window width, specifically includes： When the accuracy of the transmission data is less than preset value XI, sliding window width is increased to preset width nl;
    When the accuracy of the transmission data is more than or equal to the preset value XI and during less than or equal to the preset value Y1, keep sliding window width constant；
    When the accuracy of the transmission data is more than the Y1, sliding window width is decreased to preset width ml.
    9th, before the method according to any one of claim 7 or 8, it is characterised in that the quality of wireless channel information and preset information according to acquisition, adjustment sliding window width, methods described also includes：The feedback information that decompressor end is sent is received, the feedback information includes NACK or the ACK feedbacks that the decompressor end is decompressed to packet；
    According to the feedback information, the accuracy of decompression is obtained；
    Then the accuracy or error rate any of which and preset information according to acquisition, adjusts sliding window width, specifically includes：
    When the accuracy of the transmission data is less than preset value XI, and the accuracy of decompression is less than or equal to preset value Z1, and sliding window width is increased to preset width nl;
    When the accuracy of the transmission data is less than preset value XI, and the accuracy of decompression is more than preset value Z1, keeps current sliding window width；
    When the accuracy of the transmission data is more than or equal to the preset value XI and during less than or equal to the preset value Y1, current sliding window width is kept；
    When it is described transmission data accuracy be more than the Y1, and decompression accuracy be more than preset value
    Z1, sliding window width is decreased to preset width ml;
    When the accuracy of the transmission data is more than the Y1, and the accuracy of decompression is less than or equal to preset value Z1, keeps current sliding window width.
    10th, a kind of compression set, it is characterised in that including：Acquiring unit, adjustment unit, compression unit and transmitting element,
    The acquiring unit, for obtaining quality of wireless channel information；
    The adjustment unit, for the quality of wireless channel information and preset information according to the acquisition, adjusts sliding window width； The compression unit, for according to the sliding window width after adjustment, being compressed to the header of packet；
    The transmitting element, for the packet after compression to be sent into decompressor end.
    11st, compression set according to claim 10, it is characterised in that described device also includes：Second receiving unit, the feedback information for receiving decompressor end transmission；
    Then the adjustment unit adjusts sliding window width specifically for the feedback information of the quality of wireless channel information according to the acquisition, preset information and the decompressor end received.
    12nd, compression set according to claim 10, it is characterised in that the acquiring unit, specifically for obtain the ratio between carrier wave and interference noise CINR, signal to noise ratio snr, received signal strength indicator RSSI wherein any one parameter value；
    Then the adjustment unit, specifically for the parameter value and preset information according to CINR, SNR or RSSI of acquisition wherein any one, adjusts compression end sliding window width.
    13rd, compression set according to claim 12, it is characterized in that, the adjustment unit, specifically for CINR, SNR or RSSI wherein any one when the acquisition parameter value be less than preset value X when, according to preset information, sliding window width is increased to preset width n;When the parameter value of CINR, SNR or RSSI wherein any one of the acquisition is more than or equal to the preset value X and during less than or equal to the preset value Y, keep sliding window width constant；When the parameter value of CINR, SNR or RSSI wherein any one of the acquisition is more than the Y, sliding window width is decreased to preset width m.
    14th, compression set according to claim 10, it is characterised in that when using HARQ
    (ARQ) or when hybrid automatic repeat-request (HARQ) technology is communicated, described device also includes：First receiving unit, NACK or ack signal any of which for receiving receiving terminal transmission, the receiving terminal includes decompressor end；
    Then the acquiring unit, the NACK or ack signal any of which are received specifically for basis, obtain the accuracy or error rate any of which of transmission data, and accuracy or error rate any of which item represents quality of wireless channel letter；；
    Then the adjustment unit, specifically for the accuracy according to the acquisition or error rate any of which and preset information, adjusts sliding window width. 15th, compression set according to claim 10, it is characterised in that the acquiring unit includes：First acquisition unit and statistic unit；
    The first acquisition unit, the parameter value for acquisition CINR, SNR or RSSI wherein any one in preset time T more than once；
    The statistic unit, the parameter value for counting CINR, SNR or RSSI wherein any one in the preset time T falls into preset each interval number, preset each interval expression quality of wireless channel information；
    Then the adjustment unit, specifically for the interval and preset information according to the parameter value number fallen at most, adjusts sliding window width.
    16th, compression set according to claim 10, it is characterised in that the compression unit includes：Least significant bit counting unit and the first compression unit are obtained,
    The acquisition least significant bit counting unit, for according to the sliding window width after the adjustment, obtaining least significant digit；
    Data, for the number of significant digit according to acquisition and current packet format Type, are compressed by first compression unit.
CN200980115080.2A 2009-04-16 2009-04-16 Method and apparatus for improving header compression performance Expired - Fee Related CN102282809B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2009/071313 WO2010118579A1 (en) 2009-04-16 2009-04-16 Method and apparatus for improving header compression performance

Publications (2)

Publication Number Publication Date
CN102282809A true CN102282809A (en) 2011-12-14
CN102282809B CN102282809B (en) 2014-06-11

Family

ID=42982124

Family Applications (1)

Application Number Title Priority Date Filing Date
CN200980115080.2A Expired - Fee Related CN102282809B (en) 2009-04-16 2009-04-16 Method and apparatus for improving header compression performance

Country Status (2)

Country Link
CN (1) CN102282809B (en)
WO (1) WO2010118579A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112671693A (en) * 2019-10-16 2021-04-16 ***通信集团山东有限公司 Video data compression method, device, storage medium and base station

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1992671A (en) * 2005-12-28 2007-07-04 上海原动力通信科技有限公司 Method for transmitting IP header compression data packet in the third-generation evolution system
CN101283620A (en) * 2005-10-10 2008-10-08 日本电气株式会社 Header compression optimization method during and after handovers in cellular communication network
CN101364937A (en) * 2007-08-10 2009-02-11 华为技术有限公司 Method and system for keeping robust header compression mechanism communication
US20090080422A1 (en) * 2007-09-21 2009-03-26 Posdata Co., Ltd. Header-compression packet processing method, mobile station, base station, and control station in wireless communication system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101283620A (en) * 2005-10-10 2008-10-08 日本电气株式会社 Header compression optimization method during and after handovers in cellular communication network
CN1992671A (en) * 2005-12-28 2007-07-04 上海原动力通信科技有限公司 Method for transmitting IP header compression data packet in the third-generation evolution system
CN101364937A (en) * 2007-08-10 2009-02-11 华为技术有限公司 Method and system for keeping robust header compression mechanism communication
US20090080422A1 (en) * 2007-09-21 2009-03-26 Posdata Co., Ltd. Header-compression packet processing method, mobile station, base station, and control station in wireless communication system

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
B.WANG ET AL: "On implementation and improvement of robust header compression in UMTS", 《THE 13TH IEEE INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS, 2002》 *
YICHUAN WU ET AL: "Channel state dependent robust TCP/IP header compression for 3G wireless networks", 《IEEE INTERNATIONAL CONFERENCE ON PERFORMANCE, COMPUTING, AND COMMUNICATIONS, 2004》 *
厉群等: "ROHC协议分析与建模", 《计算机工程与设计》 *
张载龙等: "无线因特网中信头压缩技术研究", 《南京邮电大学学报(自然科学版)》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112671693A (en) * 2019-10-16 2021-04-16 ***通信集团山东有限公司 Video data compression method, device, storage medium and base station
CN112671693B (en) * 2019-10-16 2022-06-14 ***通信集团山东有限公司 Video data compression method, device, storage medium and base station

Also Published As

Publication number Publication date
CN102282809B (en) 2014-06-11
WO2010118579A1 (en) 2010-10-21

Similar Documents

Publication Publication Date Title
US8665720B2 (en) Method and system for determining limited soft buffer size on transport blocks for rate matching
AU772591B2 (en) Data transmission in radio system
CN101627633B (en) Method of transmitting A/V data stream in a source device of wireless network
CN100571201C (en) Control station device, base station apparatus, terminal installation, packet communication system and block communication method
US7746802B2 (en) Method and apparatus for channel state feedback using arithmetic coding
CN101310503B (en) Method and apparatus for supporting voice over ip services over a cellular wireless communication network
RU2451403C2 (en) Method and apparatus in telecommunication system
KR20010041310A (en) Dynamic frame size setting for multichannel transmission
US20020019232A1 (en) Radio link control with limited retransmissions for streaming services
WO2018229948A1 (en) Base station device, terminal device, wireless communication system, and communication method
WO2008118051A1 (en) Method for controlling output power in a radio communications network
TW536895B (en) Two stage data packet processing scheme
CN104852788A (en) Data broadcast ARQ method based on maximum-minimum network encoding
CN103338412A (en) Adaptive video coding systemcwireless adaptive modulation and coding
CN109861797A (en) A kind of data transmission method and system
CN112887056B (en) Fountain code transmission method based on probability feedback and stage in self-organizing network
CN101180822A (en) Enhanced voip media flow quality by adapting speech encoding based on selected modulation and coding scheme (mcs)
Grabska et al. Steganography in WiMAX networks
CN102282809A (en) Method and apparatus for improving header compression performance
US11039341B2 (en) Method and apparatus for scheduling voice service in packet domain
EP3821552A1 (en) Device and method for supporting harq for wi-fi
CN108242974B (en) Method and device for dynamically adjusting CQI based on error rate and mobile terminal
EP1624605A1 (en) Permeable-layer reception method for reliable multicast transmission in wireless systems
US20220345262A1 (en) Method for harq transmission
CN101582755A (en) Method, device and system for feeding back response information

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140611