CN101835196B - Method and device for mode conversion in robust header compression - Google Patents
Method and device for mode conversion in robust header compression Download PDFInfo
- Publication number
- CN101835196B CN101835196B CN201010175248.3A CN201010175248A CN101835196B CN 101835196 B CN101835196 B CN 101835196B CN 201010175248 A CN201010175248 A CN 201010175248A CN 101835196 B CN101835196 B CN 101835196B
- Authority
- CN
- China
- Prior art keywords
- pattern
- target pattern
- uor
- decompression machine
- type bag
- 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.)
- Active
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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Packages (AREA)
- Communication Control (AREA)
Abstract
The invention provides a method and a device for mode conversion in robust header compression, which is used for the mode conversion of a compressor and a decompressor of profile2 and profile3. The method comprises the following steps: after the compressor receives a feedback packet carrying a target mode, a command of canceling mode conversion is sent to the decompressor if a UOR-2 type packet carrying the target mode can not be sent to the decompressor within a preset time; and after the decompressor receives the command of canceling mode conversion, the mode conversion is terminated. The method can effectively correct the defects in the RFC3095 protocol, and ensures that dead lock can not happen to the mode conversion in the aspect of flow.
Description
Technical field
The present invention relates to the robustness head compression technology in moving communicating field, relate in particular to the method and apparatus of a kind of pattern conversion in robustness header compression.
Background technology
Due to the restriction of physical condition, it is lower that the wireless link in mobile communication system and wire link are compared transmission rate, and the error rate is higher.In order effectively to utilize limited wireless signal-path band width resource, introduced robustness head compression technology (RObust Header Compress, hereinafter to be referred as ROHC).The core of ROHC is to utilize the information redundancy between the grouping of Business Stream to carry out the information in the packets headers between the transparent direct connected node of compression and decompression.ROHC technology is described by the RFC3095 document of IETF (Internet Engineering task groups), and in February, 2007 IETF it is revised, revision document be RFC4815.
Pattern is a very important concept in ROHC.Three kinds of operator schemes in RFC3095 agreement, have been defined, respectively unidirectional mode (Unidirectional mode, be designated hereinafter simply as U pattern), bidirectional optimistic mode (Bidirectional Optimistic mode, be designated hereinafter simply as O pattern), bidirectional reliable mode (Bidirectional Reliable mode, is designated hereinafter simply as R pattern).
Under U pattern, do not have feedback path, packet data package can only send to a direction, and compressor reducer, to decompression machine direction, does not exist decompression machine to the feedback packet of compressor reducer transmission.The state of compressor reducer change mainly depend on periodically update and the packet flow of dividing into groups in the irregular variation of a field.Owing to periodically updating and lacking the feedback mechanism recovering for mistake, the compression efficiency of U pattern is lower for other two kinds of patterns.The compression of ROHC must be from U pattern, after compressor reducer receives the feedback packet of a pointing-type migration, can start to be converted to other patterns.
There is similar part in O pattern and U pattern, its difference is to exist a decompression machine to the feedback path of compressor reducer, for mistake, recovers and important updating context.The no longer renewal of periodic under O pattern.The target of O pattern is to improve to greatest extent compression efficiency and less use feedback path, and it has reduced due to resident mistake or the invalid mistake bag causing of context.
There is larger difference in R pattern and above two kinds of patterns, most important difference be a large amount of uses of feedback path and prevent compressor reducer and decompression machine context between step-out.The transmission of feeding back under R pattern, for confirming all updating contexts, comprises the renewal of sequence-number field.The target of R pattern is farthest to improve robustness, prevents or reduce the further expansion of packet loss and wrong bag, even if also at utmost reduce the probability that context is invalid when there is packet loss or wrong bag.
Between each different mode, can change, the feedback packet that pattern conversion is carried CRC check field by decompression machine to compressor reducer transmission is initiated.In 5.6 joints of RFC3095, having described three kinds of operator schemes can change mutually, and pattern conversion schematic diagram as shown in Figure 1.
In addition in 5.6 joints of RFC3095 and 3.1 joints of RFC4815, for Optimizing Mode flow path switch, agreement has been introduced two state variables at compressor side, is respectively C_MODE (compressor reducer pattern variable) and C_TRANS (compressor reducer pattern transition status variable).The value of C_MODE is {, in R}, meaning of parameters is respectively U pattern, O pattern and R pattern for U, O, and the initial value of C_MODE is U.The value of C_TRANS P, in D}, wherein meaning of parameters is P (PENDING), D (DONE), the initial value of C_TRANS is D.
In decompression machine side, also having introduced two state variables, is respectively D_MODE (decompression machine pattern variable) and D_TRANS (decompression machine pattern transition status variable).The value of D_MODE is {, in R}, initial value is U for U, O; The value of D_TRANS is {, in D}, initial value is D for I (Initiated), P.
The pattern flow path switch of ROHC is sent and is initiated with the feedback packet of expectation target pattern by decompression machine, and in current agreement, except the conversion of U pattern to O pattern completed by a piece of news, the conversion of other pattern all adopts the mode of three-way handshake to complete.Initial, centre in three-way handshake and end-state are all by above-mentioned state-variable description, and agreement is stipulated:
C_MODE and D_MODE represent the immediate status of compressor reducer and decompression machine;
PENDING in C_TRANS represents to receive the state conversion request of decompression machine;
DONE in C_TRANS represents that compressor side pattern flow path switch is complete;
INITIATED in D_TRANS represents that now decompression machine has been initiated mode switch request;
PENDING in D_TRANS represents that the mode switch request that decompression machine has received that compressor reducer sends responds;
DONE in D_TRANS represents that decompression machine side form formula flow path switch is complete;
Fig. 2 is that O pattern is to the transfer process of R pattern.
In Fig. 2, as long as decompression machine does not receive that pattern conversion parameter is set to the IR of R (Initiation andRefresh), IRDYN (Initiation and Refresh-dynamic) or UOR-2 compressed package, just still rest on INITIATED state.When C_TRANS is P, compressor reducer can not send 0 type or 1 type compressed package, all can not send 0,1 type compressed package before the ACK of the UOR-2 that is also R at the pattern conversion parameter of receiving, IRDYN or IR compressed package.Decompression machine at ACK after UOR-2, IRDYN or IR compressed package, receive 0 type or 1 type compressed package, it is D that D_TRANS could be set, flow process finishes.
U pattern is identical to the flow path switch of R pattern with O pattern to the flow path switch of R pattern.
Fig. 3 is that R pattern is to the flow path switch of O pattern.
As long as decompression machine does not receive that pattern conversion parameter is set to the UOR-2 of O, IRDYN or IR compressed package, continues to remain on INITIATED state.When C_TRANS is P, compressor reducer can not send 0 type or 1 type compressed package, all can not send 0,1 type compressed package before the ACK of the UOR-2 that is also O at the pattern conversion parameter of receiving, IRDYN or IR compressed package.Decompression machine at ACK after UOR-2, IRDYN or IR compressed package, receive 0 type or 1 type compressed package, it is D that D_TRANS could be set, flow process finishes.
Fig. 4 is the flow path switch that R pattern, O pattern arrive U pattern.
At first UOR-2 of decompression machine ACK (U), IRDYN (U) or IR (U), be also that after the response of decompression machine ACK mode switch request, decompression machine must continue the feedback that sending mode is U, until receive 0 type or 1 type compressed package.
In order to prevent that in pattern flow path switch three-way handshake flow process, feedback message is lost the deadlock causing, in agreement, also stipulated when C_TRANS is P, pattern information is included in the compressed package of transmission and sends, and is at least periodically (being IR/IRDYN/UOR-2 compressed package); When D_TRANS is P, decompression machine needn't be that each message of receiving sends feedback, but must send continuously feedback with CRC (in figure last ACK message) according to some cycles.
And the packet format defining in RFC3095 agreement only has the IR/IRDYN compressed package of Profile1 type can carrying mode parameter, for the equal carrying mode parameter not of the IR/IRDYN compressed package of Profile2 and Profile3 type.When shaking hands for the first time, may cause like this compressor reducer to send in mode parameter cannot being included in to compressed package, thereby cause pattern transfer process generation deadlock.
Summary of the invention
The technical problem to be solved in the present invention is, the method and apparatus of a kind of pattern conversion in robustness header compression is provided, and prevents from, in pattern transfer process, deadlock occurs.
In order to solve the problems of the technologies described above, the present invention proposes the method for a kind of pattern conversion in robustness header compression, and the compressor reducer and the decompression machine that are applied to profile2 and profile3 carry out pattern conversion, comprising:
Compressor reducer, after receiving the feedback packet of carrying target pattern, still cannot send the UOR-2 type bag that carries target pattern to decompression machine if surpass a scheduled time, to decompression machine, sends the instruction of cancelling pattern conversion;
Described decompression machine receives after the instruction of cancelling pattern conversion, end mode conversion.
Further, the method for above-mentioned pattern conversion also can have following characteristics:
Described compressor reducer is after receiving the feedback packet of carrying target pattern, start a timer, its timing is the described scheduled time, described timer then before, if can use the UOR-2 type bag that carries target pattern to compress, close described timer, and send to decompression machine the UOR-2 type bag that carries target pattern, if described timer is to still using constantly the UOR-2 type bag that carries target pattern to compress, to decompression machine, send the instruction of cancelling pattern conversion.
Further, the method for above-mentioned pattern conversion also can have following characteristics:
Compressor reducer increases a wait (W) state in its C_TRANS;
Compressor reducer is after receiving the feedback packet of carrying target pattern, C_TRANS is set to W state, if can send the UOR-2 type bag that carries target pattern to decompression machine within the described scheduled time, C_TRANS is set to P state, if surpass the described scheduled time, still cannot send the UOR-2 type bag that carries target pattern to decompression machine, C_TRANS is set to D state.
Further, the method for above-mentioned pattern conversion also can have following characteristics:
Compressor reducer, after receiving the feedback packet of carrying target pattern, within the described scheduled time, when receiving new bag to be compressed, judges whether to use the UOR-2 type bag that carries target pattern to compress at every turn.
In order to solve the problems of the technologies described above, the present invention also proposes a kind of compression method in robustness header compression, and the compressor reducer that is applied to profile2 and profile3 carries out pattern conversion, comprising:
Compressor reducer, after receiving the feedback packet of carrying target pattern, still cannot send the UOR-2 type bag that carries target pattern to decompression machine if surpass a scheduled time, to decompression machine, sends the instruction of cancelling pattern conversion.
Further, above-mentioned compression method also can have following characteristics:
Described compressor reducer is after receiving the feedback packet of carrying target pattern, start a timer, its timing is the described scheduled time, described timer then before, if can use the UOR-2 type bag that carries target pattern to compress, close described timer, and send to decompression machine the UOR-2 type bag that carries target pattern, if described timer is to still using constantly the UOR-2 type bag that carries target pattern to compress, to decompression machine, send the instruction of cancelling pattern conversion.
Further, above-mentioned compression method also can have following characteristics:
Compressor reducer increases a wait (W) state in its C_TRANS;
Compressor reducer is after receiving the feedback packet of carrying target pattern, C_TRANS is set to W state, if can send the UOR-2 type bag that carries target pattern to decompression machine within the described scheduled time, C_TRANS is set to P state, if surpass the described scheduled time, still cannot send the UOR-2 type bag that carries target pattern to decompression machine, C_TRANS is set to D state.
Further, above-mentioned compression method also can have following characteristics:
Compressor reducer, after receiving the feedback packet of carrying target pattern, within the described scheduled time, when receiving new bag to be compressed, judges whether to use the UOR-2 type bag that carries target pattern to compress at every turn.
In order to solve the problems of the technologies described above, the present invention also proposes the method for a kind of decompression in robustness header compression, and the decompression machine that is applied to profile2 and profile3 carries out pattern conversion, comprising:
Decompression machine after receiving the instruction of the pattern of the cancelling conversion that compressor reducer sends, end mode conversion.
In order to solve the problems of the technologies described above, the present invention also proposes a kind of compression set in robustness header compression, and the compressor reducer that is applied to profile2 and profile3 carries out pattern conversion, comprises processing module and sending module, wherein:
Described processing module, after receiving the feedback packet of carrying target pattern, still cannot send the UOR-2 type bag that carries target pattern to decompression machine if surpass a scheduled time, to described sending module, sends the instruction of cancelling pattern conversion;
Described sending module, the instruction of the pattern of cancelling that described processing module is sent conversion is sent to decompression machine.
Further, above-mentioned compression set also can have following characteristics:
Also comprise a timer:
Described processing module, after receiving the feedback packet of carrying target pattern, start described timer, described timer then before, if can use the UOR-2 type bag that carries target pattern to compress, close described timer, and send to described sending module the UOR-2 type bag that carries target pattern, if described timer is to still using constantly the UOR-2 type bag that carries target pattern to compress, to described sending module, send the instruction of cancelling pattern conversion;
Described timer starts under the control of described processor, and its timing is the described scheduled time;
Described sending module, when receiving the instruction of the pattern of the cancelling conversion that described processing module sends or carrying the UOR-2 type bag of target pattern, is sent to decompression machine by the described UOR-2 type bag of cancelling the instruction of pattern conversion or carrying target pattern.
Further, above-mentioned compression set also can have following characteristics:
Also comprise a state setting module, wherein:
Described state setting module, increase a wait (W) state, and the mode set command sending according to described processing module arranges the state of C_TRANS in its C_TRANS;
Described processing module, after receiving the feedback packet of carrying target pattern, also sends to described state setting module the instruction that C_TRANS is set to W state; In the time of can carrying the UOR-2 type bag of target pattern to decompression machine transmission within the described scheduled time, also to described state setting module, send the instruction that C_TRANS is set to P state; In the time still cannot carrying the UOR-2 type bag of target pattern to decompression machine transmission over the described scheduled time, also to described state setting module, send the instruction that C_TRANS is set to D state.
Further, above-mentioned compression set also can have following characteristics:
Described processing module after receiving the feedback packet of carrying target pattern, within the described scheduled time, when receiving new bag to be compressed, judges whether to use the UOR-2 type bag that carries target pattern to compress at every turn.
In order to solve the problems of the technologies described above, the present invention also proposes a kind of decompressing device in robustness header compression, and the decompression machine that is applied to profile2 and profile3 carries out pattern conversion, comprising:
Described decompressing device, after receiving the instruction of the pattern of the cancelling conversion that compressor reducer sends, end mode conversion.
In order to solve the problems of the technologies described above, the present invention also proposes the system of a kind of pattern conversion in robustness header compression, and the compressor reducer and the decompression machine that are applied to profile2 and profile3 carry out pattern conversion, comprise above-mentioned compression set and above-mentioned decompressing device.
The method and apparatus of the pattern conversion in robustness header compression provided by the invention, with respect to prior art, tool has the following advantages:
1, the defect in modified R FC3095 agreement, guarantees that from flow process pattern conversion deadlock can not occur;
2, compressor reducer C_TRANS increases an intermediate state W (Wait for sending UOR-2), and the value of C_TRANS changes to that { D}, makes pattern flow path switch more clear reliable for P, W;
3, open mode conversion timing device on compressor reducer, increases a compressor reducer and sends to decompression machine to cancel the feedback option of pattern conversion, the fail safe of raising pattern conversion.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that U pattern in prior art, O pattern, R pattern are changed each other;
Fig. 2 is the transfer process schematic diagram that in prior art, O pattern arrives R pattern;
Fig. 3 is the transfer process schematic diagram that in prior art, R pattern arrives O pattern;
Fig. 4 is the transfer process schematic diagram that R pattern in prior art, O pattern arrive U pattern;
Fig. 5 is the method flow schematic diagram of a kind of pattern conversion in embodiment of the present invention robustness header compression;
Fig. 6 is a kind of instruction schematic diagram of cancelling pattern conversion in embodiment of the present invention robustness header compression;
Fig. 7 is the idiographic flow schematic diagram that adopts embodiment of the present invention mode conversion method;
Fig. 8 is the device block diagram of a kind of pattern conversion in embodiment of the present invention robustness header compression.
Embodiment
The present invention proposes the method for a kind of pattern conversion in robustness header compression, the compressor reducer and the decompression machine that are applied to profile2 and profile3 carry out pattern conversion, its basic conception is: compressor reducer is after receiving the feedback packet of carrying target pattern, if surpass a scheduled time, still cannot send the UOR-2 type bag that carries target pattern to decompression machine, to decompression machine, send the instruction of cancelling pattern conversion; Described decompression machine receives after the instruction of cancelling pattern conversion, end mode conversion, thus the defect well in modified R FC3095 agreement guarantees that from flow process pattern conversion deadlock can not occur.
Below in conjunction with accompanying drawing, embodiment of the present invention is described in detail.
Referring to Fig. 5, the figure shows the method for a kind of pattern conversion in embodiment of the present invention robustness header compression, the compressor reducer and the decompression machine that are applied to profile2 and profile3 carry out pattern conversion, comprise step:
Step S501: compressor reducer, after receiving the feedback packet of carrying target pattern, still cannot send the UOR-2 type bag that carries target pattern to decompression machine if surpass a scheduled time, sends to decompression machine the instruction of cancelling pattern conversion;
Step S502: described decompression machine receives after the instruction of cancelling pattern conversion, end mode conversion.
Can adopt a timer to carry out timing to the described scheduled time.Described compressor reducer is after receiving the feedback packet of carrying target pattern, start described timer, its timing is the described scheduled time, described timer then before, if can use the UOR-2 type bag that carries target pattern to compress, close described timer, and to decompression machine, send the UOR-2 type bag carry target pattern, if described timer is to still using constantly the UOR-2 type bag that carries target pattern to compress, to decompression machine, send the instruction of cancelling pattern conversion.
Further, the instruction of the pattern of the cancelling conversion that compressor reducer sends to decompression machine can be an option, and as shown in Figure 6, described option type is 8, and length is 0.
Further, compressor reducer can increase a wait (W) state in its C_TRANS, so that pattern flow path switch is more clear reliable.Compressor reducer is after receiving the feedback packet of carrying target pattern, C_TRANS is set to W state, if can send the UOR-2 type bag that carries target pattern to decompression machine within the described scheduled time, C_TRANS is set to P state, if surpass the described scheduled time, still cannot send the UOR-2 type bag that carries target pattern to decompression machine, C_TRANS is set to D state.
Compressor reducer, after receiving the feedback packet of carrying target pattern, within the described scheduled time, when receiving new bag to be compressed, judges whether to use the UOR-2 type bag that carries target pattern to compress at every turn.
Referring to Fig. 7, the figure shows the idiographic flow schematic diagram that adopts the above-mentioned execution mode of the present invention to carry out pattern conversion, comprise step:
Step S701: pattern flow path switch starts, enters step S702;
Step S702: decompression machine sends the ACK/NACK feedback packet of carrying expectation target pattern, enters step S703;
Step S703: decompressor is set to I by state variable D_TRANS, enters step S704;
Step S704: compressor reducer receives the ACK/NACK feedback packet of carrying expectation target pattern, enters step S705;
Step S705: compressor reducer is set to W state by state variable C_TRANS, enters step S706;
Step S706: compressor reducer opening timing device T_ModeTrans, if timer is not overtime, enters step S707, if timer expiry enters step S121;
Step S707: receive new bag to be compressed, enter step S708;
Step S708: judge whether to use the UOR-2 type bag that carries target pattern to compress, be to enter step S709, otherwise enter step S707;
Step S709: close T_ModeTrans timer, enter step S710;
Step S710: send the UOR-2 bag that carries expectation target pattern, C_TRANS is set to P, and C_MODE is set to target pattern, enters step S711;
Step S711: decompression machine is received the UOR-2 bag that carries expectation target pattern, enters step S712;
Step S712: the mode parameter in decompression machine decompress(ion) UOR-2 bag, compare with expectation target pattern, enter step S713;
Step S713: judging that whether the comparative result in previous step is identical, is to enter step S714, otherwise enters step S711;
Step S714: decompression machine periodically sends the feedback packet of carrying expectation target pattern, enters step S715;
Step S715: compressor reducer receives the feedback packet of carrying expectation target pattern, enters step S716;
Step S716: compressor reducer changes state variable C_TRANS into D, enters step S717;
Step S717: compressor reducer sends 0 or 1 type compressed package under expectation target pattern, enters step S718;
Step S718: decompression machine receives 0 or 1 type compressed package under expectation target pattern, enters step S719;
Step S719: decompression machine changes state variable D_TRANS into D, enters step S720;
Step S720: pattern flow path switch finishes;
Step S721: timer T_ModeTrans is overtime, enters step S721;
Step S722: send the decompression machine that feeds back to of the pattern of cancelling conversion options as shown in Figure 6, enter step S723;
Step S723: putting C_TRANS is D state, enters step S724;
Step S724: decompression machine is received and carried the feedback of cancelling pattern conversion options, enters step S725;
Step S725: putting decompression machine D_TRANS is D state, enters step S726;
Step S726: pattern conversion is cancelled flow process and completed.
The embodiment of the present invention also provides a kind of compression method in robustness header compression, and the compressor reducer that is applied to profile2 and profile3 carries out pattern conversion, comprising:
Compressor reducer, after receiving the feedback packet of carrying target pattern, still cannot send the UOR-2 type bag that carries target pattern to decompression machine if surpass a scheduled time, to decompression machine, sends the instruction of cancelling pattern conversion.
Further, described compressor reducer is after receiving the feedback packet of carrying target pattern, start a timer, its timing is the described scheduled time, described timer then before, if can use the UOR-2 type bag that carries target pattern to compress, close described timer, and to decompression machine, send the UOR-2 type bag carry target pattern, if described timer is to still using constantly the UOR-2 type bag that carries target pattern to compress, to decompression machine, send the instruction of cancelling pattern conversion.
Further, the instruction of the pattern of the cancelling conversion that compressor reducer sends to decompression machine is an option, and described option type is 8, and length is 0.
Further, compressor reducer increases a wait (W) state in its C_TRANS.Compressor reducer is after receiving the feedback packet of carrying target pattern, C_TRANS is set to W state, if can send the UOR-2 type bag that carries target pattern to decompression machine within the described scheduled time, C_TRANS is set to P state, if surpass the described scheduled time, still cannot send the UOR-2 type bag that carries target pattern to decompression machine, C_TRANS is set to D state.
Further, compressor reducer, after receiving the feedback packet of carrying target pattern, within the described scheduled time, when receiving new bag to be compressed, judges whether to use the UOR-2 type bag that carries target pattern to compress at every turn.
The embodiment of the present invention also provides a kind of compression method in robustness header compression, and the decompression machine that is applied to profile2 and profile3 carries out pattern conversion, decompression machine after receiving the instruction of the pattern of the cancelling conversion that compressor reducer sends, end mode conversion.
In order to realize above-mentioned compression method, the embodiment of the present invention also provides a kind of compression set in robustness header compression, and the compressor reducer that is applied to profile2 and profile3 carries out pattern conversion, as shown in Figure 8, comprises processing module and sending module, wherein:
Described processing module, after receiving the feedback packet of carrying target pattern, still cannot send the UOR-2 type bag that carries target pattern to decompression machine if surpass a scheduled time, to described sending module, sends the instruction of cancelling pattern conversion;
Described sending module, the instruction of the pattern of cancelling that described processing module is sent conversion is sent to decompression machine.
Further, also comprise a timer:
Described processing module, after receiving the feedback packet of carrying target pattern, start described timer, described timer then before, if can use the UOR-2 type bag that carries target pattern to compress, close described timer, and send to described sending module the UOR-2 type bag that carries target pattern, if described timer is to still using constantly the UOR-2 type bag that carries target pattern to compress, to described sending module, send the instruction of cancelling pattern conversion;
Described timer starts under the control of described processor, and its timing is the described scheduled time;
Described sending module, when receiving the instruction of the pattern of the cancelling conversion that described processing module sends or carrying the UOR-2 type bag of target pattern, is sent to decompression machine by the described UOR-2 type bag of cancelling the instruction of pattern conversion or carrying target pattern.
Further, also comprise a state setting module, wherein:
Described state setting module, increase a wait (W) state, and the mode set command sending according to described processing module arranges the state of C_TRANS in its C_TRANS;
Described processing module, after receiving the feedback packet of carrying target pattern, also sends to described state setting module the instruction that C_TRANS is set to W state; In the time of can carrying the UOR-2 type bag of target pattern to decompression machine transmission within the described scheduled time, also to described state setting module, send the instruction that C_TRANS is set to P state; In the time still cannot carrying the UOR-2 type bag of target pattern to decompression machine transmission over the described scheduled time, also to described state setting module, send the instruction that C_TRANS is set to D state.
Further, described processing module after receiving the feedback packet of carrying target pattern, within the described scheduled time, when receiving new bag to be compressed, judges whether to use the UOR-2 type bag that carries target pattern to compress at every turn.
Further, described in cancel pattern conversion instruction can be an option, as shown in Figure 6, described option type is 8, length is 0.
In order to realize above-mentioned decompression method, the embodiment of the present invention also provides a kind of decompressing device, and the decompression machine that is applied to profile2 and profile3 carries out pattern conversion, described decompressing device, after receiving the instruction of the pattern of the cancelling conversion that compressor reducer sends, end mode conversion.
In order to realize above-mentioned decompression method, the embodiment of the present invention also provides the system of a kind of pattern conversion in robustness header compression, the compressor reducer and the decompression machine that are applied to profile2 and profile3 carry out pattern conversion, comprise above-mentioned compression set and above-mentioned decompressing device, by above-mentioned compression set, pattern conversion is carried out to time monitoring, when overtime, to decompressing device, send the instruction of cancelling pattern conversion in time, decompressing device is after receiving the instruction of the pattern of the cancelling conversion that compressor reducer sends, end mode conversion, thereby the defect in modified R FC3095 agreement effectively, from flow process, guarantee that pattern conversion deadlock can not occur.
These are only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a kind of method that in robustness header compression, pattern is changed, the compressor reducer and the decompression machine that are applied to profile2 and profile3 carry out pattern conversion, it is characterized in that, comprising:
Compressor reducer, after receiving the feedback packet of carrying target pattern, still cannot send the UOR-2 type bag that carries target pattern to decompression machine if surpass a scheduled time, to decompression machine, sends the instruction of cancelling pattern conversion;
Described decompression machine receives after the instruction of cancelling pattern conversion, end mode conversion;
Compressor reducer increases by a wait W state in its C_TRANS;
Compressor reducer is after receiving the feedback packet of carrying target pattern, C_TRANS is set to W state, if can send the UOR-2 type bag that carries target pattern to decompression machine within the described scheduled time, C_TRANS is set to P state, if surpass the described scheduled time, still cannot send the UOR-2 type bag that carries target pattern to decompression machine, C_TRANS is set to D state.
2. the method that pattern as claimed in claim 1 is changed, is characterized in that:
Described compressor reducer is after receiving the feedback packet of carrying target pattern, start a timer, its timing is the described scheduled time, described timer then before, if can use the UOR-2 type bag that carries target pattern to compress, close described timer, and send to decompression machine the UOR-2 type bag that carries target pattern, if described timer is to still using constantly the UOR-2 type bag that carries target pattern to compress, to decompression machine, send the instruction of cancelling pattern conversion.
3. the method that pattern as claimed in claim 1 is changed, is characterized in that:
Compressor reducer, after receiving the feedback packet of carrying target pattern, within the described scheduled time, when receiving new bag to be compressed, judges whether to use the UOR-2 type bag that carries target pattern to compress at every turn.
4. a kind of compression method in robustness header compression, the compressor reducer that is applied to profile2 and profile3 carries out pattern conversion, it is characterized in that, comprising:
Compressor reducer, after receiving the feedback packet of carrying target pattern, still cannot send the UOR-2 type bag that carries target pattern to decompression machine if surpass a scheduled time, to decompression machine, sends the instruction of cancelling pattern conversion;
Compressor reducer increases by a wait W state in its C_TRANS;
Compressor reducer is after receiving the feedback packet of carrying target pattern, C_TRANS is set to W state, if can send the UOR-2 type bag that carries target pattern to decompression machine within the described scheduled time, C_TRANS is set to P state, if surpass the described scheduled time, still cannot send the UOR-2 type bag that carries target pattern to decompression machine, C_TRANS is set to D state.
5. compression method as claimed in claim 4, is characterized in that:
Described compressor reducer is after receiving the feedback packet of carrying target pattern, start a timer, its timing is the described scheduled time, described timer then before, if can use the UOR-2 type bag that carries target pattern to compress, close described timer, and send to decompression machine the UOR-2 type bag that carries target pattern, if described timer is to still using constantly the UOR-2 type bag that carries target pattern to compress, to decompression machine, send the instruction of cancelling pattern conversion.
6. compression method as claimed in claim 4, is characterized in that:
Compressor reducer, after receiving the feedback packet of carrying target pattern, within the described scheduled time, when receiving new bag to be compressed, judges whether to use the UOR-2 type bag that carries target pattern to compress at every turn.
7. a kind of compression set in robustness header compression, the compressor reducer that is applied to profile2 and profile3 carries out pattern conversion, comprises processing module and sending module, wherein:
Described processing module, after receiving the feedback packet of carrying target pattern, still cannot send the UOR-2 type bag that carries target pattern to decompression machine if surpass a scheduled time, to described sending module, sends the instruction of cancelling pattern conversion;
Described sending module, the instruction of the pattern of cancelling that described processing module is sent conversion is sent to decompression machine;
State setting module, increase by a wait W state, and the mode set command sending according to described processing module arranges the state of C_TRANS in its C_TRANS;
Described processing module, after receiving the feedback packet of carrying target pattern, also sends to described state setting module the instruction that C_TRANS is set to W state; In the time of can carrying the UOR-2 type bag of target pattern to decompression machine transmission within the described scheduled time, also to described state setting module, send the instruction that C_TRANS is set to P state; In the time still cannot carrying the UOR-2 type bag of target pattern to decompression machine transmission over the described scheduled time, also to described state setting module, send the instruction that C_TRANS is set to D state.
8. compression set as claimed in claim 7, is characterized in that, also comprises a timer:
Described processing module, after receiving the feedback packet of carrying target pattern, start described timer, described timer then before, if can use the UOR-2 type bag that carries target pattern to compress, close described timer, and send to described sending module the UOR-2 type bag that carries target pattern, if described timer is to still using constantly the UOR-2 type bag that carries target pattern to compress, to described sending module, send the instruction of cancelling pattern conversion;
Described timer starts under the control of processor, and its timing is the described scheduled time;
Described sending module, when receiving the instruction of the pattern of the cancelling conversion that described processing module sends or carrying the UOR-2 type bag of target pattern, is sent to decompression machine by the described UOR-2 type bag of cancelling the instruction of pattern conversion or carrying target pattern.
9. compression set as claimed in claim 7, is characterized in that:
Described processing module after receiving the feedback packet of carrying target pattern, within the described scheduled time, when receiving new bag to be compressed, judges whether to use the UOR-2 type bag that carries target pattern to compress at every turn.
10. the system of a kind of pattern conversion in robustness header compression, the compressor reducer and the decompression machine that are applied to profile2 and profile3 carry out pattern conversion, comprise in claim 7 to 9 compression set described in any one.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010175248.3A CN101835196B (en) | 2010-05-14 | 2010-05-14 | Method and device for mode conversion in robust header compression |
| PCT/CN2010/080013 WO2011140809A1 (en) | 2010-05-14 | 2010-12-20 | Method, device and system for mode transition in robust header compression |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010175248.3A CN101835196B (en) | 2010-05-14 | 2010-05-14 | Method and device for mode conversion in robust header compression |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101835196A CN101835196A (en) | 2010-09-15 |
| CN101835196B true CN101835196B (en) | 2014-08-13 |
Family
ID=42719083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010175248.3A Active CN101835196B (en) | 2010-05-14 | 2010-05-14 | Method and device for mode conversion in robust header compression |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101835196B (en) |
| WO (1) | WO2011140809A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101848491A (en) | 2010-04-21 | 2010-09-29 | 中兴通讯股份有限公司 | Mode converting method and device in robust header compression |
| CN101835196B (en) * | 2010-05-14 | 2014-08-13 | 中兴通讯股份有限公司 | Method and device for mode conversion in robust header compression |
| CN101977402B (en) * | 2010-10-19 | 2015-04-01 | 中兴通讯股份有限公司 | Method and device for reusing context in robustness header compression |
| WO2012142833A1 (en) * | 2011-04-20 | 2012-10-26 | 中兴通讯股份有限公司 | Method and system for updating reorder depth in robust header compression |
| CN109219083A (en) * | 2017-07-06 | 2019-01-15 | 深圳市中兴微电子技术有限公司 | Optimization method and system in a kind of conversion of robustness header compression mode |
| CN107801212A (en) * | 2017-10-17 | 2018-03-13 | 京信通信系统（中国）有限公司 | A kind of communication means and device |
| CN111092844B (en) * | 2018-10-23 | 2023-12-01 | 瑞昱半导体股份有限公司 | Method for performing mode conversion of compression operation and transmission device |
| CN109239071B (en) * | 2018-11-20 | 2021-12-21 | 帝麦克斯(苏州)医疗科技有限公司 | Pathological section scanner control method and pathological section scanner |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1689301A (en) * | 2002-10-11 | 2005-10-26 | 艾利森电话股份有限公司 | Header compression method |
| CN1801099A (en) * | 1999-12-09 | 2006-07-12 | 英特尔公司 | Method and apparatus for entering and exiting multiple threads within a multithreaded processor |
| CN1996941A (en) * | 2006-06-30 | 2007-07-11 | 华为技术有限公司 | A robust processing method for header compression U mode error |
| CN101494641A (en) * | 2008-01-23 | 2009-07-29 | 中兴通讯股份有限公司 | Mode transition method and apparatus of robustness head compression technology |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101835196B (en) * | 2010-05-14 | 2014-08-13 | 中兴通讯股份有限公司 | Method and device for mode conversion in robust header compression |
-
2010
- 2010-05-14 CN CN201010175248.3A patent/CN101835196B/en active Active
- 2010-12-20 WO PCT/CN2010/080013 patent/WO2011140809A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1801099A (en) * | 1999-12-09 | 2006-07-12 | 英特尔公司 | Method and apparatus for entering and exiting multiple threads within a multithreaded processor |
| CN1689301A (en) * | 2002-10-11 | 2005-10-26 | 艾利森电话股份有限公司 | Header compression method |
| CN1996941A (en) * | 2006-06-30 | 2007-07-11 | 华为技术有限公司 | A robust processing method for header compression U mode error |
| CN101494641A (en) * | 2008-01-23 | 2009-07-29 | 中兴通讯股份有限公司 | Mode transition method and apparatus of robustness head compression technology |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101835196A (en) | 2010-09-15 |
| WO2011140809A1 (en) | 2011-11-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101835196B (en) | Method and device for mode conversion in robust header compression | |
| JP4755173B2 (en) | Method and apparatus for generating a compressed status report updated to indicate data to be received later | |
| JP3751823B2 (en) | Header compression in real-time services | |
| CN108632229B (en) | Header compression method, header decompression method and device in multi-connection | |
| CN101998438B (en) | Method and equipment for improving performance of PDCP (Packet Data Convergence Protocol) ROHC (Robust Header Compression) algorithm | |
| CN101848491A (en) | Mode converting method and device in robust header compression | |
| JP5527209B2 (en) | Communication apparatus and header control method | |
| WO2011047621A1 (en) | Header compression data packet transmission method and device based on retransmission mechanism | |
| CN103152359A (en) | Method for improving end-to-end wireless transmission control protocol (TCP) linear network coding | |
| KR102002939B1 (en) | On-demand file recovery methods and systems | |
| US9717049B2 (en) | Wireless communication apparatus and method | |
| TWI672923B (en) | Transmission control method of connection confirmation data packet and device thereof | |
| CN111478826A (en) | Packet loss rate determining method, data transmission control method and data transmission system | |
| CN114020304A (en) | LoRaWan-based OTA implementation method, terminal device and computer storage medium | |
| CN107257265B (en) | Real-time transmission data stream forward error correction, system, device and storage medium | |
| CN110636009A (en) | Data transmission method and device | |
| CN109219083A (en) | Optimization method and system in a kind of conversion of robustness header compression mode | |
| CN101494641A (en) | Mode transition method and apparatus of robustness head compression technology | |
| WO2014205819A1 (en) | Link establishing method, node and apparatus | |
| CN109327832B (en) | Single-type multi-terminal low-power-consumption wireless transmission system and transmission method thereof | |
| WO2012155703A1 (en) | Link parameter autonegotiation method, terminal and system based on hdlc protocol | |
| WO2014067126A1 (en) | Method and device for transmitting data packet | |
| CN102611539B (en) | Method for shortening length of status report, system and receiving terminal | |
| WO2016161784A1 (en) | Method and device for reducing message congestion in lmp | |
| US9525650B2 (en) | Method and system for updating reorder depth in robust header compression |
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 | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20100915 Assignee: SHENZHEN ZTE MICROELECTRONICS TECHNOLOGY CO., LTD. Assignor: ZTE Corporation Contract record no.: 2015440020319 Denomination of invention: Method and device for mode conversion in robust header compression Granted publication date: 20140813 License type: Common License Record date: 20151123 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model |