CN106941697A - A kind of method and apparatus for sending, receiving timestamp information - Google Patents
A kind of method and apparatus for sending, receiving timestamp information Download PDFInfo
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- CN106941697A CN106941697A CN201610005600.6A CN201610005600A CN106941697A CN 106941697 A CN106941697 A CN 106941697A CN 201610005600 A CN201610005600 A CN 201610005600A CN 106941697 A CN106941697 A CN 106941697A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/40—Network security protocols
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- 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
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- Compression, Expansion, Code Conversion, And Decoders (AREA)
Abstract
The invention discloses a kind of method and apparatus for sending, receiving timestamp information, wherein, this method includes：In the case of the timestamp information of current data packet and the timestamp information identical of a upper packet, judge whether timestamp information identical number of times reaches preset times；In the case where timestamp information identical number of times reaches preset times, when being received again by the timestamp information identical timestamp information with a upper packet, timestamp information is sent using zero bit.Whether the present invention is identical by relatively more adjacent timestamp information twice, in the case where identical number of times reaches preset times, next identical timestamp information is sent using zero bit, this method sends timestamp using zero bit, and compression time is faster, processing speed is obviously improved, prior art is solved in compression, TS_STRIDE is only 0, and in the case where front and rear two bag Timestamp are the same, can only initial value send, compression efficiency is relatively low.
Description
Technical field
The present invention relates to field of mobile communication, more particularly to a kind of method and apparatus for sending, receiving timestamp information.
Background technology
In order to make full use of bandwidth, introduce ROHC (RObust Header Compression, believe head compression protocol), the technology being compressed to the protocol header in service message, agreement wherein for being related to voice and video business, there is the profile4 can be with compressed IP protocol header, there is the profile2 can be with compressed IP/udp header, profile1 can be with compressed IP/UDP/RTP protocol headers, for the message profile1 compression efficiency highests of Real-time Transport Protocol (Real-time Transport Protocol, RTP) type.There are IR, FO, SO compressive state each safeguarded under every kind of profile, compression efficiency is from low to high, the compact model each safeguarded under every kind of profile, different compact models ensures the robustness that head compresses according to the different modes of moving back, wherein U pattern cycles are moved back, R patterns are moved back according to the feedback of terminal, and O patterns are both can to move back and can also move back in the cycle according to feedback progress.
In the prior art, the main compression algorithm thought under Profile1 for Timestamp is as follows：Be not usually between timestamp (Timestamp) domain in two continuous RTP packet header it is any increased, it is opposite every time it is increased be a definite value (TS_STRIDE) integral multiple.For example：In voice flow, the sample frequency of voice is usually 8kHz, and 20ms speech data is included in a frame data, a usual speech frame is placed in a RTP bag and transmitted, and the increment in Timestamp domains is usually N*160 (l60=8000*0.02) in RTP bags in this case, and N is positive integer, being introduced into for N is primarily due in voice call process, it is referred to as quiet period for some time to exist, does not have voice presence in this period, therefore Timestamp increment is 160 integral multiple.
Timestamp value can be represented by equation below：Timestamp=TS_SCALED*TS_STRIDE+TS_OFFSET；It is not 0 that TS_STRIDE is required in existing protocol, because calculating TS_SCALED needs Timestamp divided by TS_STRIDE, calculating TS_OFFSET needs TS_STRIDE on Timestamp moulds.
If compression end conciliates the value that pressure side has reciprocally negotiated TS_STRIDE and TS_OFFSET, compression end only needs to send every time TS_SCALED value, and the expense for sending TS_SCALED is much smaller than and sends TS, it is achieved thereby that compression.
For the voice and video business under profile1; time stamp T imestamp in Real-time Transport Protocol bag; dynamic field influences compression efficiency; Timestamp is typically all by fixed step size increase after being fixed for speech business code rate; and be that Timestamp is mainly used in and voice unification for video traffic; so often have many identical Timestamp messages of a picture for big video, but still to add 1 increased by the SN in RTP messages.And for Timestamp compress mode, do not have clearly to provide the processing mode when Timestamp is constant in RFC3095 and RFC4815, only require the necessary non-zeros of TS_STRIDE, so we can only understand this mode according to saltus step according to agreement, require that the necessary initial values of Timestamp are sent when saltus step, greatly reduce Timestamp compression efficiency.
The content of the invention
A kind of method and apparatus for sending, receiving timestamp information of present invention offer, to solve prior art in compression, TS_STRIDE is only 0, and in the case where front and rear two bag Timestamp are the same, can only initial value transmission, the problem of compression efficiency is relatively low.
In order to solve the above technical problems, on the one hand, the present invention provides a kind of method for sending timestamp information, including：In the case of the timestamp information of current data packet and the timestamp information identical of a upper packet, judge whether timestamp information identical number of times reaches preset times；In the case where timestamp information identical number of times reaches preset times, when being received again by the timestamp information identical timestamp information with a upper packet, the timestamp information is sent using zero bit.
Further, before judging whether timestamp information identical number of times reaches preset times, also include：Judge whether the timestamp information of current data packet is identical with the timestamp information of a upper packet；The current data packet timestamp information with it is described on a packet timestamp information identical in the case of, the definite value for safeguarding compression end is zero, and to solution pressure side send safeguard the information that definite value is zero so that solution pressure side it is identical with the definite value of compression end.
On the other hand, the present invention provides a kind of method for receiving timestamp information, including：Judge to decompress whether the number of times for obtaining identical timestamp information reaches default decompression number of times；In the case where the number of times for obtaining identical timestamp information reaches the default decompression number of times, maintenance time offset is equal to timestamp information.
Further, judge to decompress whether the number of times for obtaining identical timestamp information is reached before presetting decompression number of times, also include：The maintenance information from compression end is received, wherein, it is described to safeguard that information is to safeguard the information that definite value is zero；Solution pressure side safeguards that information changes local definite value according to described.
On the other hand, the present invention also provides a kind of device for sending timestamp information, including：First judge module, in the case of the timestamp information identical of the timestamp information of current data packet and a upper packet, judging whether timestamp information identical number of times reaches preset times；Sending module, in the case of reaching preset times in timestamp information identical number of times, when being received again by the timestamp information identical timestamp information with a upper packet, the timestamp information is sent using zero bit.
Further, also include：Whether the second judge module, the timestamp information for judging current data packet is identical with the timestamp information of a upper packet；Performing module, for the timestamp information of the current data packet with it is described on a packet timestamp information identical in the case of, the definite value for safeguarding compression end is zero, and the information that definite value is zero is safeguarded to solution pressure side transmission by the sending module, so that solution pressure side is identical with the definite value of compression end.
On the other hand, the present invention provides a kind of device for receiving timestamp information, including：3rd judge module, for judging to decompress whether the number of times for obtaining identical timestamp information reaches default decompression number of times；Maintenance module, in the case of the default decompression number of times is reached in the number of times for obtaining identical timestamp information, maintenance time offset is equal to timestamp information.
Further, also include：Receiver module, for receiving the maintenance information from compression end, wherein, it is described to safeguard that information is to safeguard the information that definite value is zero；Modified module, for safeguarding that information changes local definite value according to described.
Another aspect, the present invention provides a kind of compressibility, including：The device of the device of above-mentioned transmission timestamp information and above-mentioned reception timestamp information.
Whether the present invention is identical by relatively more adjacent timestamp information twice, in the case where identical number of times reaches preset times, next identical timestamp information is sent using zero bit, this method sends timestamp using zero bit, and compression time is faster, processing speed is obviously improved, prior art is solved in compression, TS_STRIDE is only 0, and in the case where front and rear two bag Timestamp are the same, can only initial value send, compression efficiency is relatively low.
Brief description of the drawings
Fig. 1 is the flow chart of the method for transmission timestamp information in the embodiment of the present invention；
Fig. 2 is the flow chart of the method for reception timestamp information in the embodiment of the present invention；
Fig. 3 is the structural representation of the device of transmission timestamp information in the embodiment of the present invention；
Fig. 4 is the preferred structure schematic diagram of the device of transmission timestamp information in the embodiment of the present invention；
Fig. 5 is the structural representation of the device of reception timestamp information in the embodiment of the present invention；
Fig. 6 is the preferred structure schematic diagram of the device of reception timestamp information in the embodiment of the present invention；
Fig. 7 is the compression end workflow diagram of embodiment one in the preferred embodiment of the present invention；
Fig. 8 is the compression end workflow diagram of embodiment two in the preferred embodiment of the present invention.
Embodiment
In order to solve prior art in compression, TS_STRIDE is only 0, and in the case where front and rear two bag Timestamp are the same, can only initial value send, the problem of compression efficiency is relatively low, the invention provides a kind of method and apparatus for sending, receiving timestamp information, below in conjunction with accompanying drawing and embodiment, the present invention will be described in further detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, the present invention is not limited.
The embodiment of the present invention provides a kind of method for sending timestamp information, and the flow of this method is as shown in figure 1, including step S102 to S104：
S102, in the case of the timestamp information (Timestamp) of current data packet and the timestamp information identical of a upper packet, judges whether timestamp information identical number of times reaches preset times；
S104, in the case where timestamp information identical number of times reaches preset times, when being received again by the timestamp information identical timestamp information with a upper packet, timestamp information is sent using zero bit.
Whether the embodiment of the present invention is identical by relatively more adjacent timestamp information twice, in the case where identical number of times reaches preset times, next identical timestamp information is sent using zero bit, this method sends timestamp using zero bit, and compression time is faster, processing speed is obviously improved, prior art is solved in compression, TS_STRIDE is only 0, and in the case where front and rear two bag Timestamp are the same, can only initial value send, compression efficiency is relatively low.
During realization, before judging whether timestamp information identical number of times reaches preset times, whether the timestamp information that can also prejudge current data packet is identical with the timestamp information of a upper packet；If the timestamp information of current data packet is identical with the timestamp information of a upper packet, the definite value for safeguarding compression end is zero, and safeguards the information that definite value is zero to solution pressure side transmission, so that solution pressure side is identical with the definite value of compression end.It is normal to send if the timestamp information of the timestamp information of current data packet and a upper packet is differed.
The embodiment of the present invention also provides a kind of method for receiving timestamp information, and applied to solution pressure side, its flow is as shown in Fig. 2 including step S202 to S204：
S202, judges to decompress whether the number of times for obtaining identical timestamp information reaches default decompression number of times；
S204, in the case where the number of times for obtaining identical timestamp information reaches default decompression number of times, maintenance time offset is equal to timestamp information.
The embodiment of the present invention is the operation for solving pressure side, and the default decompression number of times of solution pressure side should be identical with the preset times for receiving identical time stamp information of compression end, can so ensure that both sides transmitting-receiving progress is consistent.
Judge decompression obtain identical timestamp information number of times whether reach default decompression number of times before, may also receive from the maintenance information of compression end, wherein, safeguard information be compression end send safeguard the information that definite value is zero；The solution pressure side definite value local according to information modification is safeguarded.
The embodiment of the present invention a kind of device for sending timestamp information, the structural representation of the device are also provided as shown in figure 3, including：First judge module 10, in the case of the timestamp information identical of the timestamp information of current data packet and a upper packet, judging whether timestamp information identical number of times reaches preset times；Sending module 20, is coupled with the first judge module 10, in the case of reaching preset times in timestamp information identical number of times, when being received again by the timestamp information identical timestamp information with a upper packet, and timestamp information is sent using zero bit.
Said apparatus can be with as shown in figure 4, further comprise：Whether the second judge module 30, the timestamp information for judging current data packet is identical with the timestamp information of a upper packet；Performing module 40, coupled with the second judge module 30 and the first judge module 10, for in the case of the timestamp information identical of the timestamp information of current data packet and a upper packet, the definite value for safeguarding compression end is zero, and the information that definite value is zero is safeguarded to solution pressure side transmission by sending module, so that solution pressure side is identical with the definite value of compression end.
The embodiment of the present invention also provide it is a kind of receive timestamp information device, interacted with the device of above-mentioned transmission timestamp information, its structural representation as shown in figure 5, including：3rd judge module 50, for judging to decompress whether the number of times for obtaining identical timestamp information reaches default decompression number of times；Maintenance module 60, is coupled with the 3rd judge module 50, and in the case of default decompression number of times is reached in the number of times for obtaining identical timestamp information, maintenance time offset is equal to timestamp information.
Said apparatus can be with as shown in fig. 6, further comprise：Receiver module 70, for receiving the maintenance information from compression end, wherein, it is to safeguard the information that definite value is zero to safeguard information；Modified module 80, is coupled with the judge module 50 of receiver module 70 and the 3rd, for the definite value local according to information modification is safeguarded.
The embodiment of the present invention also provides a kind of compressibility, and it includes the device of above-mentioned transmission timestamp information and receives the device of timestamp information.Those skilled in the art could be aware that how to realize the compressibility, here is omitted according to above-mentioned record.
Preferred embodiment
The embodiment of the present invention is directed to the improvement that profile1 followings compact model is carried out, in order to improve voice and video compression efficiency.
When continuously there are identical Timestamp values in RTP messages, in order to improve compression efficiency, also TS_STRIDE (definite value) and TS_OFFSET (offset) now can be safeguarded by adjacent Timestamp values, but TS_STRIDE=0 now, TS_OFFSET=Timestamp, and TS_SCALED (expanding value) we be defaulted as with sequence number (SN) change be, therefore the Timestamp of continuous message is constant always, so the embodiment of the present invention can send Timestamp using 0bit, so as to substantially increase the compression efficiency of video traffic.
Compression end safeguards Timestamp, TS_STRIDE and TS_OFFSET corresponding relation, safeguards TS_SCALED and sequence number corresponding relation；When TS_STRIDE is not 0, we are compressed decompression to Timestamp by the inner TS_SCALED and sequence number of formula " Timestamp=TS_SCALED*TS_STRIDE+TS_OFFSET " relation and TS_OFFSET.We are compressed decompression to Timestamp with the TS_OFFSET in formula above when TS_STRIDE is 0.It is described in detail below by instantiation.
Embodiment one
Present embodiment is realized by carrying the extension header of 3 types, go for U/O patterns, because compression end can consider that solution pressure side safeguards the relation of TS_STRIDE and TS_OFFSET in context automatically under U/O patterns, only TS_STRIDE and TS_OFFSET relation are safeguarded by sending original Timestamp.Conciliate two aspects of pressure side to specifically describe flow by compression end separately below, compression end workflow is as shown in fig. 7, step is as follows：
Step 1：
Compression end：A bag Timestamp values are carried out identical with upper one bag Timestamp values；Timestamp is carried with the extension header of 3 types, while safeguarding compression end NEW_TS_STRIDE=0.
Solve pressure side：Receive and also do same processing, the Timestamp of the extension header carrying of 3 types of decompression is identical with the value of last time, while safeguarding the NEW_TS_STRIDE=0 of decompressor end.
Step 2：
Compression end：When continuously having carried out 3 bag (this number of times can be safeguarded based on experience value, be a preset times) identical Timestamp, TS_STRIDE=NEW_TS_STRIDE=0 is safeguarded.
Solve pressure side：When continuous decompression obtains 3 bag identical Timestamp, TS_STRIDE=NEW_TS_STRIDE=0 is safeguarded；And safeguard TS_OFFSET=Timestamp.
Step 3：
Compression end：When receive the 4th bag Timestamp values it is identical when, compression end can with zero bit send Timestamp.
Solve pressure side：When receiving the 4th zero bit compressed packet of bag, Timestamp=TS_OFFSET is decompressed.
Embodiment two
Present embodiment is moved back by state sends out the compressed package realization of initialization context, go for O/R patterns, moved back by state, send the message of the initialization context with Timestamp and TS_STRIDE to safeguard TS_STRIDE and TS_OFFSET relation.Conciliate two aspects of pressure side to specifically describe flow by compression end separately below, compression end workflow is as shown in figure 8, step is as follows：
Step 1：
Compression end：A bag Timestamp values are carried out identical with upper one bag Timestamp values；Carrying Timestamp and TS_STRIDE. with IR or IR-DYN messages, Timestamp is exactly actual value here, and TS_STRIDE is 0.
Solve pressure side：Receive and also do same processing, decompression IR or IR-DYN messages carry Timestamp and TS_STRIDE, safeguard TS_STRIDE=0.
Step 2：
Compression end：Under O/R patterns, after solution pressure side feedback is received, TS_STRIDE=0 is safeguarded.
Solve pressure side：Under O/R patterns, TS_STRIDE=0, TS_OFFSET=Timestamp are directly safeguarded.
Step 3：
Compression end：When receive the 4th bag Timestamp values it is identical when, compression end can with zero bit send Timestamp.
Solve pressure side：When receiving the 4th zero bit compressed packet of bag, Timestamp=TS_OFFSET is decompressed.
Above-described embodiment is not distinguishing for 0 situation with TS_STRIDE, be 0 when require TS_SCALED with RTP messages in sequence number variable quantities it is identical could zero bit send, but, as long as embodiment of the present invention Timestamp values it is constant can zero bit transmission, by using the embodiment of the present invention, after robustness header compression function enable, particularly with HD video business, occur in continuous videos bag with identical Timestamp values, the compression efficiency of the robustness header compression of big video traffic can be greatly improved.
Although being example purpose, the preferred embodiments of the present invention are had been disclosed for, those skilled in the art will recognize that various improvement, increase and substitution are also possible, and therefore, the scope of the present invention should be not limited to above-described embodiment.
Claims (9)
1. a kind of method for sending timestamp information, it is characterised in that including：
In the case of the timestamp information of current data packet and the timestamp information identical of a upper packet, sentence
Whether disconnected timestamp information identical number of times reaches preset times；
In the case where timestamp information identical number of times reaches preset times, it is being received again by and a upper data
During the timestamp information identical timestamp information of bag, the timestamp information is sent using zero bit.
2. the method as described in claim 1, it is characterised in that judge timestamp information identical number of times
Whether reach before preset times, also include：
Judge whether the timestamp information of current data packet is identical with the timestamp information of a upper packet；
The current data packet timestamp information with it is described on a packet timestamp information identical
In the case of, the definite value for safeguarding compression end is zero, and safeguards the information that definite value is zero to solution pressure side transmission, so that
Solve pressure side identical with the definite value of compression end.
3. a kind of method for receiving timestamp information, it is characterised in that including：
Judge to decompress whether the number of times for obtaining identical timestamp information reaches default decompression number of times；
In the case where the number of times for obtaining identical timestamp information reaches the default decompression number of times, when safeguarding
Between offset be equal to timestamp information.
4. method as claimed in claim 3, it is characterised in that judge that decompression obtains identical timestamp
Whether the number of times of information is reached before default decompression number of times, is also included：
The maintenance information from compression end is received, wherein, it is described to safeguard that information is to safeguard the information that definite value is zero；
Solution pressure side safeguards that information changes local definite value according to described.
5. a kind of device for sending timestamp information, it is characterised in that including：
First judge module, the timestamp for the timestamp information in current data packet and a upper packet is believed
Manner of breathing judges whether timestamp information identical number of times reaches preset times with the case of；
Sending module, in the case of reaching preset times in timestamp information identical number of times, again
When receiving the timestamp information identical timestamp information with a upper packet, send described using zero bit
Timestamp information.
6. device as claimed in claim 5, it is characterised in that also include：
Second judge module, for judge current data packet timestamp information whether with a upper packet when
Between stamp information it is identical；
Performing module, for the timestamp information of the current data packet with it is described on a packet time
Stab information identical in the case of, the definite value for safeguarding compression end is zero, and by the sending module to solution pressure side
The information that definite value is zero is safeguarded in transmission, so that solution pressure side is identical with the definite value of compression end.
7. a kind of device for receiving timestamp information, it is characterised in that including：
3rd judge module, for judge decompression obtain identical timestamp information number of times whether reach it is default
Decompress number of times；
Maintenance module, for reaching the default decompression number of times in the number of times for obtaining identical timestamp information
In the case of, maintenance time offset is equal to timestamp information.
8. device as claimed in claim 7, it is characterised in that also include：
Receiver module, for receiving the maintenance information from compression end, wherein, it is described to safeguard that information is maintenance
The information that definite value is zero；
Modified module, for safeguarding that information changes local definite value according to described.
9. a kind of compressibility, it is characterised in that including：
The device of transmission timestamp information described in claim 5 or 6, and described in claim 7 or 8
Receive the device of timestamp information.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610005600.6A CN106941697A (en) | 2016-01-04 | 2016-01-04 | A kind of method and apparatus for sending, receiving timestamp information |
| PCT/CN2016/110874 WO2017118273A1 (en) | 2016-01-04 | 2016-12-19 | Method and device for transmitting and receiving timestamp information |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610005600.6A CN106941697A (en) | 2016-01-04 | 2016-01-04 | A kind of method and apparatus for sending, receiving timestamp information |
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| CN106941697A true CN106941697A (en) | 2017-07-11 |
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| CN201610005600.6A Withdrawn CN106941697A (en) | 2016-01-04 | 2016-01-04 | A kind of method and apparatus for sending, receiving timestamp information |
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| Country | Link |
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| CN (1) | CN106941697A (en) |
| WO (1) | WO2017118273A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114189487B (en) * | 2021-11-09 | 2024-05-14 | 广东宜通联云智能信息有限公司 | RTP-based data reordering method, system, equipment and medium |
| CN114040030B (en) * | 2021-11-18 | 2023-11-24 | 深圳智慧林网络科技有限公司 | Data compression method, device, equipment and medium based on preset rules |
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| CN1417957A (en) * | 2000-11-06 | 2003-05-14 | 松下电器产业株式会社 | Header compressing method and device and program |
| CN101366261A (en) * | 2006-01-06 | 2009-02-11 | 高通股份有限公司 | Method and apparatus for enhancing rohc performance when encountering silence suppression |
| CN101674315A (en) * | 2009-10-20 | 2010-03-17 | 中兴通讯股份有限公司 | Method and device for compressing and decompressing timestamp |
| EP2490398A1 (en) * | 2000-03-09 | 2012-08-22 | Qualcomm Incorporated | A technique for compressing a header field in a data packet |
| CN103812846A (en) * | 2012-11-14 | 2014-05-21 | 重庆重邮信科通信技术有限公司 | Header compression method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020191691A1 (en) * | 2001-05-10 | 2002-12-19 | Holborow Clive Eric | Payload header suppression including removal of fields that vary in known patterns |
| CN104394117A (en) * | 2014-03-10 | 2015-03-04 | 贵阳朗玛信息技术股份有限公司 | RTP packet transmission method and device |
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2016
- 2016-01-04 CN CN201610005600.6A patent/CN106941697A/en not_active Withdrawn
- 2016-12-19 WO PCT/CN2016/110874 patent/WO2017118273A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2490398A1 (en) * | 2000-03-09 | 2012-08-22 | Qualcomm Incorporated | A technique for compressing a header field in a data packet |
| CN1417957A (en) * | 2000-11-06 | 2003-05-14 | 松下电器产业株式会社 | Header compressing method and device and program |
| CN101366261A (en) * | 2006-01-06 | 2009-02-11 | 高通股份有限公司 | Method and apparatus for enhancing rohc performance when encountering silence suppression |
| CN101674315A (en) * | 2009-10-20 | 2010-03-17 | 中兴通讯股份有限公司 | Method and device for compressing and decompressing timestamp |
| CN103812846A (en) * | 2012-11-14 | 2014-05-21 | 重庆重邮信科通信技术有限公司 | Header compression method and system |
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Application publication date: 20170711 |