CN101453298A - Processing method, system and apparatus for header compression in wireless network - Google Patents
Processing method, system and apparatus for header compression in wireless network Download PDFInfo
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- CN101453298A CN101453298A CNA2007101990329A CN200710199032A CN101453298A CN 101453298 A CN101453298 A CN 101453298A CN A2007101990329 A CNA2007101990329 A CN A2007101990329A CN 200710199032 A CN200710199032 A CN 200710199032A CN 101453298 A CN101453298 A CN 101453298A
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- 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
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
- H04W80/02—Data link layer protocols
Abstract
The invention discloses a method for processing header compression in a wireless network. The method comprises: a compression end and a decompression end establish initial context of data package header compression (PHC); the compression end transmits state transition information to the decompression end when the compression state is required to be changed; and the decompression end utilizes the state transition information to perform decompression processing on data packages from the compression end. The method can change the state of variable dynamic parameters in real time, and can also perform header compression on a media access control (MAC) layer. Simultaneously, the invention also discloses a system and a device for processing header compression in the wireless network.
Description
Technical field
The present invention relates to communication technical field, processing method, system and the device of head compression in particularly a kind of wireless network.
Background technology
Because the restriction of physical condition, Radio Link is compared with wire link, and its transmission rate is lower, and the error rate is higher.When in the wireless area environment, using the IP technology, there is the excessive problem of packet header expense.For example, an IPv6 voice communication grouping, the packet payload that the user really needs often only accounts for 22% of whole group.So not only waste bandwidth has also increased the probability that grouping is dropped because of makeing mistakes.If do not adopt an effective measure, in the valuable wireless network resource of waste, also can reduce service quality (QoS).
Robust header compression (ROHC, Robust Header Compression) is a kind of header compression scheme based on stream.In the network data transmission process, its most of leader territory of the grouping of same stream has identical thresholding.ROHC gets a reference packet in certain stream, only send the information that the grouping of relative reference in the leader territory changes for other groupings, reaching the compression purpose, thereby effectively utilizes bandwidth more.Simultaneously, ROHC makes this header compression mechanism have the validity and the rational robustness of height also by the frequency and the means such as quantity, the nonsynchronous strict logic of detection and error checking and correction of Control and Feedback message.Like this, ROHC just provides a header compression mechanism that is suitable for high bit-error and long delay link.
ROHC has defined compressor reducer (Compressor) and decompressor (DeCompressor), and three kinds of states are arranged respectively.Three states of compressor reducer are IR (Initialization and Refresh), FO (FirstOrder) and SO (Second Order); Three states of decompressor are NC (No Context), SC (Static Context) and FC (Full Context).
ROHC has also divided three kinds of patterns based on the form of feedback: unidirectional mode (U-mode), bidirectional reliable mode (R-mode) and bidirectional optimistic mode (O-mode).Communication is unidirectional in the U pattern, and the compressor state migration does not rely on feedback; Negative feedback is compulsory in the O pattern; Positive feedback and negative feedback all are compulsory in the R pattern.
But ROHC can only be operated in more than the IP layer, and can't carry out the head compression to the packet of Ethernet.Simultaneously, the bottom technology of the not high and wireless network of the operating efficiency of ROHC is in conjunction with defective tightness.
Data packet head compression (Packet Header Suppression, PHS) be a pullover compression mechanism, can compress, also support the head compression that the Ethernet bag is carried out different profile on a plurality of IP layers, with respect to header compression modes such as ROHC, wider range of application is arranged.PHS has following parameter, data packet head compression sizes (PHSS, Packet header suppression size), and data packet head compression mask (Packetheader suppression mask, PHSM), data packet head compressed index (Packet headersuppression index, PHSI), and data packet head compression thresholding (Packet header suppression field, PHSF), (Packet header suppression valid, PHSV confirms) confirmed in the data packet head compression.
PHSF is determined by higher layer entities, transmits with the Bit String after alternative PHSF of a shorter PHSI and the PHSM combination on eating dishes without rice or wine then, thereby reaches the purpose of saving interface-free resources.
In this technical scheme, PHS can only partly compress the data packet head of static state, and the part that some business carry out may changing in the process all can't be compressed; It does not have feedback mechanism, does not possess the robustness of ROHC, and the real-time dynamic characteristic of following business to carry out.
Summary of the invention
The purpose of the embodiment of the invention provides in a kind of wireless network the processing method of head compression and system, device, can be implemented in and carries out the head compression below the IP layer and can carry out state to the parameter that compression mechanism changes changing.
The processing method of head compression in a kind of wireless network that the embodiment of the invention provides comprises:
Compression end and decompressor end are set up data packet head compression PHC initial context;
When needing to change compressive state, described compression end sends to described decompressor end with state-transition information;
Described decompressor end utilizes described state-transition information that the packet from described compression end is carried out decompression.
The feedback method for treating of head compression in a kind of wireless network that the embodiment of the invention provides comprises:
When needing to change compressive state, compression end sends to decompressor end with state-transition information;
After decompressor end is received this state-transition information, utilize state-transition information updating decompression states, and send feedback information to compression end;
After compression end is received feedback information, utilize described state-transition information updating compressive state.
PHC initial context method for building up in a kind of wireless network that the embodiment of the invention provides comprises:
Transmitting terminal and receiving terminal carry out capability negotiation, at transmitting terminal described in the described capability negotiation process and receiving terminal the PHC tenability of self are informed the opposite end;
Set up in the process in the business connection, described transmitting terminal is set up message to the connection that receiving terminal sends the PHC information that contains connection identifier, information of classifier and correspondence.
The treatment system of head compression in a kind of wireless network that the embodiment of the invention provides comprises: compressor reducer and decompressor, wherein,
Described compressor reducer is used for setting up the PHC initial context with described decompressor; When needs change compressive state, state-transition information is sent decompressor; Send compressed data packet to described decompressor;
Described decompressor is used for setting up the PHC initial context with described compressor reducer; Utilize described state-transition information that the packet from compressor reducer is carried out decompression.
The feedback processing system of head compression in a kind of wireless network that the embodiment of the invention provides comprises: compressor reducer and decompressor, wherein,
Described compressor reducer when being used for needs transformation compressive state, sends to described decompressor with state-transition information, and described state-transition information is the compression mechanism change information; After receiving feedback information, utilize described state-transition information updating compressive state from decompressor;
Described decompressor is used to utilize described state-transition information updating decompression states, and sends feedback information to compressor reducer.
A kind of communication system provided by the invention comprises:
Described dispensing device is used for carrying out capability negotiation with described receiving system, notifies described receiving system with described self PHC tenability information in described capability negotiation process; Send connection identifier, information of classifier and corresponding PHC information to receiving system;
Receiving system is used for carrying out capability negotiation with described dispensing device, sets up in the process at a compression mechanism described self PHC tenability information is sent to described dispensing device.
In the embodiment of the invention, compression end and decompressor end are set up the PHC initial context; When compression end is determined to need to change compressive state, state-transition information is sent decompressor end; Described decompressor end utilizes described state-transition information that the packet from compression end is carried out decompression.The present invention can upgrade in real time to the dynamic parameter that changes, but also can carry out the head compression at the MAC layer.
Description of drawings
Fig. 1 is the schematic flow sheet of embodiment of the invention method;
Fig. 2 is the form of the state-transition head of the embodiment of the invention;
Fig. 3 is a signaling message form schematic diagram of the setting of the embodiment of the invention;
Fig. 4 is another signaling message form schematic diagram of the setting of the embodiment of the invention;
Fig. 5 is the structural representation of the MAC PDU of the embodiment of the invention;
Fig. 6 sets up the idiographic flow schematic diagram of PHC initial context for compression end and decompressor end;
Fig. 7 is the idiographic flow schematic diagram of example explanation embodiment of the invention parameter negotiation for the scene with network-triggered;
Fig. 8 changes and upgrades the schematic flow sheet of compressive state for to be the example embodiment of the invention with descending scene set up the back compressive state at the PHC initial context;
Fig. 9 is the treatment system structural representation of head compression in a kind of wireless network of the embodiment of the invention;
Figure 10 is the feedback processing system configuration schematic diagram of head compression in the wireless network of the embodiment of the invention;
The structural representation of a kind of communication system that Figure 11 provides for the embodiment of the invention.
Embodiment
In embodiments of the present invention, after having set up the PHC initial context between compression end and the decompressor end, if setting up the initial compression parameter of consulting in the process at the PHC initial context changes, when just needing to change compressive state, compression end sends decompressor end with state-transition information, and described state-transition information is the compression mechanism change information; Described decompressor end utilizes described state-transition information that the packet from compression end is carried out decompression.
Referring to shown in Figure 1, the method for the embodiment of the invention may further comprise the steps:
Step 101: compression end and decompressor end are set up the PHC initial context.
Step 102: when compression end is determined to need to change compressive state, state-transition information is sent decompressor end, described state-transition information is the compression mechanism change information.
Compression end can send to decompressor end with state-transition information in the following way:
Described compression end sends medium access control (Media Access Control, MAC) protocol data bag unit (Protocol Data Unit, PDU) give described decompressor end, wherein the MAC head of MAC PDU contains whether carrier state changes sub indication among the MAC PDU, and the sub-head of state-transition, referring to shown in Figure 2, carrier state transition information in the described state-transition head can further include the sequence number of state-transition information.Described state-transition information can comprise: PHCI and corresponding dynamic parameter modification value.
Certainly, state-transition head can also comprise among Fig. 2: the CRC sign indicating number, or, by the eap-message digest of the shared key generation between transmitting terminal and the receiving terminal.Therefore, before described decompressor end was carried out decompression, decompressor end can utilize the CRC sign indicating number of described state-transition information and described eap-message digest that compression end is verified earlier, and after checking is passed through, carried out decompression again.
Can utilize the idle bit position indicating status in the MAC head to change sub-head.But,, can make up indicating status to change sub-head idle bit position in the MAC head and extendible sub-header field (ESF) in order to satisfy follow-up protocol extension because the idle bit on the MAC head has only one.
In addition, because MAC SDU in the process that becomes MAC PDU, may be cut apart or be made up, and in the embodiment of the invention, utilize the sub-head of state-transition among the MAC PDU, control the compression on the MAC SDU level, so the relative position of state-transition head and MAC SDU need be determined.
Shown in Figure 2 is to be example to utilize idle bit position indicating status in the MAC head to change the son head, and PHC is exactly the state-transition head indication on the MAC head, equal 1 expression MAC head after existence change sub-head; Otherwise existence does not change sub-head; PHC-UPD-SUB-H is the sub-head of state-transition.State-transition head can comprise: PHCI with and corresponding dynamic parameter modification value, the sequence number of state-transition information, Message Digest 5 relevant parameter, and CRC algorithm relevant parameter.The sequence number of state-transition information can be the sequence number of PHC (SN), index when this sequence number is used to feed back among Fig. 2.
Step 103: described decompressor end utilizes described state-transition information that the packet from compression end is carried out decompression.
Certainly, for the continuous transmission of the packet after realizing, when compression end is determined to need to change compressive state, state-transition information is sent decompressor end; Also just have a talk about, need compression end and decompressor end all to utilize state-transition information updating decompression states, therefore, after data packet transmission in, compression end can utilize the compressive state after the variation to compress processing, and decompressor end can be utilized with corresponding decompression states and carry out decompression.
Here, compression end and decompressor end are upgraded compressive state can comprise a lot of modes, such as:
First kind of mode is directly to upgrade the mode of compression end and decompressor end renewal compressive state, specifically, when described compression end is determined to need to change compressive state, utilize described state-transition information directly to upgrade compressive state, and adopt the compressive state after upgrading that the MAC PDU that will send to decompressor end is compressed, wherein the MAC head of MAC PDU contains whether carrier state changes sub indication among the MAC PDU, and the sub-head of state-transition.Therefore, after decompressor end is received described MAC PDU, if contain the indication of state-transition head among the described MAC PDU, can utilize the state-transition information in the state-transition head among the described MAC PDU, upgrade decompression states, and utilize the decompression states after upgrading that described MAC PDU is decompressed.
The second way specifically can realize like this by upgrade the compression and decompression state again when special time or incident take place:
Decompressor end adopts former compressive state mechanism to compress or do not compress MAC PDU, not only comprises the indication of state-transition head among this MAC PDU, and the sub-head of state-transition, can also comprise that further compression mechanism changes indication information.Therefore, compression end can be utilized former compression mechanism to compress this MACPDU or not compress this MAC PDU, when described compression mechanism changes time of indication or incident and takes place, upgrades compressive state, after this, can utilize the compressive state after the renewal that the MACPDU that will send to decompressor end is compressed.And in decompressor end, can be after receiving this MAC PDU, in the time of can changing time of indication or incident and take place according to described compression mechanism, utilize the decompression states of described state-transition information updating decompressor end, and utilize the decompression states after upgrading that the time of described compression mechanism variation indication or the packet from described compression end after the incident generation are carried out decompression.
The third is a compression end after receiving that decompressor end is upgraded feedback, upgrades decompression states again, specifically can realize like this:
Compression end can adopt former compressive state mechanism to compress or do not compress described MACPDU, and wherein the MAC head of MAC PDU contains whether carrier state changes sub indication among the MAC PDU, and the sub-head of state-transition; After decompressor end is received described MAC PDU, utilize described state-transition information updating decompression states, and send feedback information, wherein contain the renewal result to compression end; Compression end can determine whether to upgrade compressive state according to the renewal result in the described feedback information, upgrades if determine decompressor end, and compression end is utilized described state-transition information updating compressive state again.
The 4th kind is compression end after receiving that decompressor end receives feedback, upgrades decompression states, and then the indication decompressor end is upgraded decompression states.Specific as follows:
Described MAC PDU can adopt former compressive state mechanism to compress or do not compress, then after described compression end transmission MAC PDU is to described decompressor end, after decompressor end is received described MAC PDU, send feedback information, wherein contain reception result to compression end; Compression end determines whether to upgrade compressive state according to the reception result in the described feedback information, if, then compression end is utilized described state-transition information updating compressive state, and carry the compression end state on the not compression MAC PDU after upgrading compressor state or first compression MAC PDU and upgraded indication information, after decompressor end is received this indication information, utilize described state-transition information to upgrade decompression states immediately.
Here, described decompressor end can send feedback information to described compression end by the signaling message that is provided with, and also can send feedback information to described compression end by MAC PDU, can also send feedback information to compression end by specific physical resource.
Fig. 3 is the content format that signaling message comprised (the not comprising the MAC head) schematic diagram of setting.Referring to shown in Figure 3, this informational message can comprise: the reception result of the dynamic parameter of CID, PHC1 and PHCI correspondence (Reception Result), PHC SN and CRC sign indicating number.Can also comprise based on the Message Authentication Code of breathing out western algorithm, or based on the Message Authentication Code (H/CMAC) of password.
Certainly,,, a plurality of graders and corresponding PHCI are arranged, and CRC calculates at a PHC parameter set, so also need to indicate the PHCI that is fed back if in connection identifier referring to shown in Figure 4.
And, can be by the MAC PDU carrying feedback information of expansion, the MAC PDU after the decompressor end utilization expansion is to the compression end feedback information.Fig. 5 is the structural representation of the MAC PDU after expanding.Referring to shown in Figure 5, this MAC PDU can comprise the feedback head (PHC FDBK SUB-H) of PHC, can comprise CID in the feedback head of PHC, accept the result (Reception Result), PHC sequence number (SN), CRC sign indicating number.Can also comprise HMAC or CMAC.Equally, if there are a plurality of PHC dynamic parameter state variation, can also comprise the Reception Result of each PHCI in the feedback of the PHC head.
When compression end is an end side, decompressor end is a network side, and, described decompressor end sends the situation of feedback information to compression end, it is the situation of descending transmission feedback information, network side can be by the physical resource of DL-MAP message informing terminal PHC feedback information, and network side can utilize this physical resource to send CID, Reception Result, PHC SN, CRC sign indicating number to terminal.Can also comprise HMAC or CMAC.
When compression end is a network side, decompressor end is an end side, and, described decompressor end sends the situation of feedback information to compression end by specific physical resource, it is the situation of up transmission feedback information, network side can send to contain and be used for downlink resource distribution (DL-MAP) message that indicating terminal carries out the specific physical resource of PHC feedback to end side, and therefore, terminal can send feedback information on the specific physical resource of network side appointment.
At above-mentioned situation, network side also can send ascending resource to terminal and distribute (UL-MAP) message; When terminal is received described UL-MAP message,, then send feedback information to network side if terminal has feedback information.And, may further include the indication that whether sends in the described feedback information, if described feedback information does not send, then network side is described terminal distribution resource always, sends up to the feedback information of described terminal to finish.
Certainly, network side can adopt polling mode to send UL-MAP message to described terminal, also can send UL-MAP message to terminal after the feedback request of receiving terminal.
Referring to shown in Figure 6, the detailed process that compression end and decompressor end are set up the PHC initial context can realize like this:
Step 601: compression end and decompressor end are carried out capability negotiation, in compression end described in the described basic capability negotiation process and decompressor end the PHC tenability of self are informed the opposite end.
Because the PHC parameter can be divided into two kinds, the static parameter relevant, i.e. PHC static parameter with terminal; Dynamic professional relevant parameter, i.e. PHC dynamic parameter.
The PHC static parameter can be in going into network process, carry out capability negotiation by SBC or REG message, for example, the PHC static parameter can comprise the ability support of following one or more parameters: PHC, promptly dynamically change on the maximum of ability, the PHSS of compressed parameter, the connection identifier grader or the maximum of PHCI, the support of PHC feedback capability, the feedback form of support, the CRC algorithm of being supported, the header compression mode of being supported, as: header compression mode is PHS, PHC or ROHC etc.
The PHC dynamic parameter can be set up in the process in connection, hold consultation by DSX message, for example, can comprise following parameter: one or more in PHCS initial value, PHCF initial value, PHCV initial value, PHCM initial value, PHCI and the feedback relevant parameter, wherein said feedback relevant parameter comprises whether needing feedback, feedback channel CID and feedback model.Further, described PHC dynamic parameter can also comprise the Message Digest 5 relevant parameter of employing, and/or, CRC algorithm relevant parameter.
In step 601, carry out having consulted the PHC static parameter in the basic capability negotiation process, and the initial value of PHC dynamic parameter.After this, when update mode changed, promptly the PHC dynamic parameter changed.
With SBC is the negotiations process of example explanation static parameter alternately:
MS sends basic capacity request (SBC-REQ) message and gives BS, the PHC static parameter of carried terminal; BS relies on the relevant information of the PHC static parameter that GW determines to GW request, simultaneously PHC static parameter that also can carried terminal; GW returns BS institute information requested; BS sends basic capacity response (SBC-RSP) message and gives MS, the PHC static parameter of carrying BS.So far, terminal and Access Network have obtained basic PHC ability information mutually, and the parameter in the follow-up communication process will be carried out on this basis.
Step 602: after described compression end is carried out access authentication to decompressor end, send connection to decompressor end and set up message, as: the DSA request message, comprising connection identifier, information of classifier and corresponding PHC information.
Step 603: after described decompressor end receives that message is set up in described connection,, set up the reception result of message, further can also comprise the reception result of each PHC parameter comprising connection to described compression end feedback DSA response message.
Fig. 7 is that the scene with network-triggered is the detailed process of example explanation embodiment of the invention parameter negotiation.Referring to shown in Figure 7, the detailed process of embodiment of the invention parameter negotiation is as follows:
Step 701: network-triggered entity triggers BS, require to connect foundation, the entity of network-triggered shown in the figure is GW; This step can be carried above-mentioned PHC dynamic parameter, if still the PHC dynamic parameter then can not carried dynamic parameter fully by BS control;
Step 702:BS sends dynamic Service increases (DSA) request (DSA-REQ) message to terminal, carries above-mentioned PHC dynamic parameter, and above-mentioned PHC dynamic parameter can be corresponding one by one with connection identifier, also can be corresponding one by one with grader; And the data that meet different classifier rules are to allow to share a connection identifier, therefore have the PHC dynamic parameters of overlapping on a connection identifier more.
Step 703: after terminal is received DSA-REQ message, the PHC dynamic parameter is resolved,, can send DSA response (DSA-RSP) message of carrying the PHC dynamic parameter that needs modification and give Access Network if the PHC dynamic parameter that needs modification is arranged; Perhaps, notice Access Network terminal is accepted all PHC dynamic parameters.
Step 704: corresponding to step 701, the receive status of BS informing network triggering entity terminal; Need its affirmation if the PHC dynamic parameter among the DSA-RSP is revised, can also carry this modification information; If by BS control, then do not need fully.
Step 705: the network-triggered entity is comprehensively judged, provides final PHC dynamic parameter.If by BS control, then do not need this step fully.
Step 706: the transmission DSA in the Access Network confirms (DSA-ACK) message to terminal, and expression is only confirmed correctly to have received DSA-RSP message, perhaps by DSA-ACK message the final PHC dynamic parameter in the step 705 is sent to terminal.
The process of PHC initial context method for building up can realize like this in the wireless network of the embodiment of the invention:
Transmitting terminal and receiving terminal carry out capability negotiation, at transmitting terminal described in the described capability negotiation process and receiving terminal the PHC tenability of self are informed the opposite end; Set up in the process at a compression mechanism, described transmitting terminal is set up message to the connection that receiving terminal sends the PHC information that contains connection identifier, information of classifier and correspondence.
Fig. 8 changes and upgrades the process of compressive state for to be the example explanation embodiment of the invention with descending scene set up the back compressive state at the PHC initial context.Referring to shown in Figure 8, the detailed process of the embodiment of the invention is as follows:
Step 801: in basic capability negotiating (SBC) process, MS sends to Access Network with self to the ability that PHC supports; Described Access Network sends to MS with the PHC tenability of self.The tenability of this moment comprises the PHC static parameter.
Step 802: alternatively, carry out access authentication procedure between MS and the Access Network.
Step 803: Access Network sends the DSA request message to MS, wherein, comprises connection identifier, information of classifier and corresponding PHC information.
Step 804:MS sends the DSA response message to Access Network, wherein, comprises the reception result to request message, the PHC parameter accept the result.After the step 803 and 804, just set up the initial context of PHC between terminal and the Access Network.
Step 805: when Access Network is received downlink data, the downlink data of receiving is carried out buffer memory, carry out a squeeze operation according to above-mentioned initial context then, and whether the data packet head that detects downlink data variation occurs, and whether satisfied the demand of state-transition.
Step 806: change in case find the data packet head of downlink data, and satisfy the demand of state-transition, then need increase a sub-head, the PHC parameter after upgrading is notified to MS in MAC back of described downlink data packet.
Step 807: if consulted feedback and feedback model between MS and the Access Network, after then terminal receives above-mentioned son head, verify, i.e. CRC or eap-message digest checking, terminal will verify that the result feeds back to Access Network; If feedback needs resource allocation, then Access Network can be the terminal distribution feedback resources in advance.
Be to connect in business to set up the foundation that realizes compression mechanism in the process in the above embodiment, promptly need just to determine the application head compression mechanism when setting up and consult initial dynamic parameter in the connection of eating dishes without rice or wine, in fact can also be to eat dishes without rice or wine to connect not determine to want the application head compression mechanism when setting up, but after a period of time has been set up in the connection of eating dishes without rice or wine, there is demand (for example interface-free resources anxiety) to trigger the application head compression mechanism.At this moment, can adopt DSC-REQ/RSP message to consult initial dynamic parameter.Equally, also can when having used, the head compression cancel the head compression that this eats dishes without rice or wine to connect by DSC-REQ/RSP.
Referring to shown in Figure 9, the treatment system of head compression in a kind of wireless network that the embodiment of the invention provides comprises: compressor reducer and decompressor, wherein,
Described compressor reducer 91 is used for setting up the PHC initial context with described decompressor; When determining to need to change compressive state, state-transition information is sent decompressor, described state-transition information is the compression mechanism change information; Send compressed data packet to described decompressor;
Described decompressor 92 is used for setting up the PHC initial context with described compressor reducer; Utilize described state-transition information that the packet from compressor reducer is carried out decompression.
Described compressor reducer 91 comprises: first context is set up unit 911, state-transition information transmitting unit 912 and is sent processing unit 913.
Unit 911 set up in first context, is used for carrying out the PHC initial context with described decompressor and consults, and sets up the PHC initial context;
State-transition information transmitting unit 912 is used for sending MAC when definite needs change compressive state
PDU gives described decompressor, and the MAC head of described MAC PDU contains whether carrier state changes sub indication among the MAC PDU, and the sub-head of state-transition, carrier state transition information in the described state-transition head;
Send processing unit 913, be used for the packet that sends to described decompressor is compressed, and the packet after described decompressor sends compression.
Described compressor reducer 91 can also comprise: first updating block 914, be used for when status mechanism changes, and utilize described state-transition information updating compressive state.
Described decompressor 92 can comprise: second context is set up unit 921 and is received processing unit 922.
Unit 921 set up in second context, is used for carrying out the PHC initial context with described compressor reducer and consults, and sets up the PHC initial context;
Receive processing unit 922, be used to utilize described state-transition information that the packet from compressor reducer is carried out decompression.
Described decompression 92 can also comprise: second updating block 923, be used for after receiving described state-transition information, and utilize described state-transition Information Compression end to upgrade decompression states.
Described decompression 92 can also comprise: feedback unit 924, be used for after receiving described state-transition information, and send feedback information to described compressor reducer.
Referring to shown in Figure 10, the feedback processing system of head compression in the wireless network of the embodiment of the invention can comprise: compressor reducer 11 and decompressor 12, wherein,
Described compressor reducer 11 when being used for determining that needs change compressive state, sends to decompressor with state-transition information, and described state-transition information is the compression mechanism change information; After receiving feedback information, utilize described state-transition information updating compressive state from decompressor;
Described decompressor 12 is used to utilize described state-transition information updating decompression states, and sends feedback information to compressor reducer.
Described compressor reducer 11 can comprise:
State-transition information transmitting unit 111 is used for sending MAC when definite needs change compressive state
PDU gives described decompressor, and the MAC head of described MAC PDU contains whether carrier state changes sub indication among the MAC PDU, and the sub-head of state-transition, carrier state transition information in the described state-transition head;
First updating block 112, be used to receive feedback information from decompressor after, utilize described state-transition information updating compressive state.
Described decompressor 12 can comprise:
Second updating block 121 is used to utilize described state-transition information updating decompression states,
Feedback unit 122 is used for sending feedback information to compressor reducer.
Referring to shown in Figure 11, a kind of communication system that the embodiment of the invention provides comprises:
Receiving system 21 is used for carrying out capability negotiation with receiving terminal, informs described dispensing device 20 in the PHC tenability of self described in the described capability negotiation process; After receiving described DSA request, to described dispensing device 20 feedback DSA response messages, comprising the reception result of request message, the reception result of PHC parameter.
In embodiments of the present invention, when compression end is determined to need to change compressive state, state-transition information can be sent decompressor end, described decompressor end utilizes described state-transition information that the packet from compression end is carried out decompression, therefore, can carry out state in real time to the dynamic parameter that changes changes.This mode and, this mode can be carried out head compression at the MAC layer, also can be to the ethernet packet header of packet, the IP data packet head, UDP/TCP and other protocol header are compressed.And, real-time feedback mechanism also is provided in the embodiment of the invention, state is changed indication information feed back, guarantee to upgrade the accuracy of operation.
The content format that those skilled in the art will appreciate that signaling message cited in the embodiment of the invention and parameters only is exemplary, and embodiments of the invention do not limit the concrete manifestation form of described content format.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (39)
1, the processing method of head compression in a kind of wireless network is characterized in that this method comprises:
Compression end and decompressor end are set up data packet head compression PHC initial context;
When needing to change compressive state, described compression end sends to described decompressor end with state-transition information;
Described decompressor end utilizes described state-transition information that the packet from described compression end is carried out decompression.
2, method according to claim 1 is characterized in that, described compression end sends to decompressor end with state-transition information, comprising:
Described compression end sends media access control MAC protocol packet unit PDU to described decompressor end, the MAC head of wherein said MAC PDU contains whether carrier state changes sub indication among the MAC PDU, and the sub-head of state-transition, carrier state transition information in the described state-transition head, or, the sequence number of carrier state transition information and state-transition information.
3, method according to claim 2 is characterized in that, described state-transition head be designated as idle bit position in the MAC head, or be idle bit position in the MAC head and the combination of extendible sub-header field ESF.
4, method according to claim 2 is characterized in that, described state-transition head also comprises: cyclic redundancy check (CRC) codes,
Before then described decompressor end was carried out decompression, this method further comprised:
Described decompressor end utilizes described CRC sign indicating number that compression end is verified.
5, method according to claim 2 is characterized in that, described state-transition head also comprises: by the eap-message digest of the shared key generation between transmitting terminal and the receiving terminal;
Before then described decompressor end was carried out decompression, this method further comprised:
Described decompressor end utilizes described eap-message digest that compression end is authenticated.
6, method according to claim 1 is characterized in that, described state-transition information comprises: data packet head compressed index PHCI and corresponding dynamic parameter modification value.
7, method according to claim 2 is characterized in that, when needing to change compressive state, described compression end utilizes described state-transition information directly to upgrade compressive state, and adopts the compressive state after upgrading that described MAC PDU is compressed,
Then described decompressor end utilizes described state-transition information that the packet from compression end is carried out decompression, comprising:
After described decompressor end is received described MAC PDU, if contain the indication of state-transition head among the described MAC PDU, utilize the state-transition information in the state-transition head among the described MAC PDU, upgrade decompression states, and utilize the decompression states after upgrading that described MAC PDU is decompressed.
8, method according to claim 2 is characterized in that, described MAC PDU adopts former compressive state mechanism to compress or do not compress, and, comprise further also among the described MAC PDU that compression mechanism changes indication information,
Compression end is upgraded compressive state, and is utilized the compressive state after upgrading that the MAC PDU that will send to decompressor end is compressed when described compression mechanism changes time of indication or incident and takes place;
When then described decompressor end changes time of indication or incident and takes place according to described compression mechanism, utilize the decompression states of described state-transition information updating decompressor end, and utilize the decompression states after upgrading that the time of described compression mechanism variation indication or the packet from described compression end after the incident generation are carried out decompression.
9, method according to claim 2, it is characterized in that, described MAC PDU adopts former compressive state mechanism to compress or do not compress, then after described compression end transmission MAC PDU is to described decompressor end, before described decompressor end utilized described state-transition information that the packet from compression end is carried out decompression, this method further comprised:
After decompressor end is received described MAC PDU, utilize described state-transition information updating decompression states, and send feedback information, wherein contain the renewal result to compression end;
Compression end determines whether to upgrade compressive state according to the renewal result in the described feedback information, if then compression end is utilized described state-transition information updating compressive state.
10, method according to claim 2, it is characterized in that, described MAC PDU adopts former compressive state mechanism to compress or do not compress, then after described compression end transmission MAC PDU is to described decompressor end, before described decompressor end utilized described state-transition information that the packet from compression end is carried out decompression, this method further comprised:
After decompressor end is received described MAC PDU, send feedback information, wherein contain reception result to compression end;
Compression end determines whether to upgrade compressive state according to the reception result in the described feedback information, if, then compression end is utilized described state-transition information updating compressive state, and carry the compression end state on the not compression MAC PDU after upgrading the compression end state or first compression MAC PDU and upgraded indication information, after decompressor end is received this indication information, utilize described state-transition information updating decompression states.
11, method according to claim 9 is characterized in that, described decompressor end sends feedback information by the signaling message that is provided with to described compression end, or, send feedback information by MAC PDU to described compression end, or, feedback information sent by specific physical resource to compression end.
12, method according to claim 9, it is characterized in that, when decompressor end is a network side, when compression end is end side, described decompressor end, further comprised before compression end sends feedback information by specific physical resource: network side sends to contain to end side and is used for the downlink resource assignment messages that indicating terminal carries out the specific physical resource of PHC feedback.
13, method according to claim 9 is characterized in that, when decompressor end is an end side, when compression end is network side, decompressor end on the specific resource before compression end sends feedback information, further comprise:
Network side sends the ascending resource assignment messages to terminal;
When terminal is received described ascending resource assignment messages,, then send feedback information to network side if terminal has feedback information.
14, method according to claim 13, it is characterized in that described feedback information also comprises the indication whether feedback information sends, if described feedback information does not send, then network side is described terminal distribution resource always, sends up to the feedback information of described terminal to finish.
15, method according to claim 13 is characterized in that, described network side adopts polling mode to send the ascending resource assignment messages to described terminal, or described network side is after the feedback request of receiving terminal, sends the ascending resource assignment messages to terminal.
16, the feedback method for treating of head compression in a kind of wireless network is characterized in that this method comprises:
When needing to change compressive state, compression end sends to decompressor end with state-transition information;
After decompressor end is received this state-transition information, utilize state-transition information updating decompression states, and send feedback information to compression end;
After compression end is received feedback information, utilize described state-transition information updating compressive state.
17, method according to claim 16 is characterized in that, described compression end sends to decompressor end with state-transition information, comprising:
Described compression end sends MAC PDU to described decompressor end, wherein the MAC head of MAC PDU contains whether carrier state changes sub indication among the MAC PDU, and the sub-head of state-transition, carrier state transition information in the described state-transition head, or, the sequence number of carrier state transition information and state-transition information.
18, method according to claim 17 is characterized in that, described state-transition head is the idle bit position in the MAC head, or is idle bit position in the MAC head and the combination of ESF.
19, method according to claim 17 is characterized in that, described state-transition head also comprises: the CRC sign indicating number,
Before then described decompressor end was carried out decompression, this method further comprised:
Described decompressor end utilizes described CRC sign indicating number that compression end is verified.
20, method according to claim 17 is characterized in that, described state-transition head also comprises: by the eap-message digest of the shared key generation between transmitting terminal and the receiving terminal;
Before then described decompressor end was carried out decompression, this method further comprised: described decompressor end utilizes described eap-message digest that compression end is authenticated.
21, method according to claim 16 is characterized in that, described state-transition information comprises: PHCI and corresponding dynamic parameter modification value.
22, method according to claim 16, it is characterized in that, described decompressor end sends feedback information by the signaling message that is provided with to described compression end, or, send feedback information by the MAC PDU after the expansion to described compression end, or, send feedback information by specific physical resource to compression end.
23, method according to claim 16, it is characterized in that, when decompressor end is a network side, when compression end is end side, described decompressor end, further comprised before compression end sends feedback information by specific physical resource: network side sends to contain to end side and is used for the downlink resource assignment messages that indicating terminal carries out the specific physical resource of PHC feedback.
24, method according to claim 16 is characterized in that, when decompressor end is an end side, when compression end is network side, decompressor end on the specific resource before compression end sends feedback information, further comprise:
Network side sends the ascending resource assignment messages to terminal;
When terminal is received described ascending resource assignment messages, if terminal has feedback information, then send feedback information to network side, the indication that whether sends comprising feedback information, if described feedback information does not send, then network side is described terminal distribution resource always, sends up to the feedback information of described terminal to finish.
25, method according to claim 24, it is characterized in that described network side adopts polling mode to send the ascending resource assignment messages to described terminal, or, described network side is after the feedback request of receiving terminal, sends ascending resource to terminal and distributes UL-MAP message.
26, PHC initial context method for building up in a kind of wireless network is characterized in that this method comprises:
Transmitting terminal and receiving terminal carry out capability negotiation, at transmitting terminal described in the described capability negotiation process and receiving terminal the PHC tenability of self are informed the opposite end;
Set up in the process at a compression mechanism, described transmitting terminal is set up message to the connection that receiving terminal sends the PHC information that contains connection identifier, information of classifier and correspondence.
27, method according to claim 26 is characterized in that, sends after the connection contain connection identifier, information of classifier and corresponding PHC information sets up message to receiving terminal at transmitting terminal, and this method further comprises:
Described receiving terminal is to the reception result of described transmitting terminal feedback at each PHC information.
28, method according to claim 26 is characterized in that, described PHC information comprises:
One or more in PHCV initial value, data packet head compression mask PHCM initial value, PHCI and the feedback relevant parameter are confirmed in data packet head compression sizes PHCS initial value, data packet head compression thresholding PHCF initial value, data packet head compression, and described feedback relevant parameter comprises whether needing feedback, feedback channel CID and feedback model.
29, method according to claim 28 is characterized in that, described PHC information also further comprises: the Message Digest 5 relevant parameter of employing, and/or, CRC algorithm relevant parameter.
30, the treatment system of head compression in a kind of wireless network is characterized in that this system comprises: compressor reducer and decompressor, wherein,
Described compressor reducer is used for setting up the PHC initial context with described decompressor; When needs change compressive state, state-transition information is sent decompressor; Send compressed data packet to described decompressor;
Described decompressor is used for setting up the PHC initial context with described compressor reducer; Utilize described state-transition information that the packet from compressor reducer is carried out decompression.
31, system according to claim 30 is characterized in that, described compressor reducer comprises:
The unit set up in first context, is used for carrying out the PHC initial context with described decompressor and consults, and sets up the PHC initial context;
The state-transition information transmitting unit, be used for when needs change compressive state, send MAC PDU to described decompressor, the MAC head of described MAC PDU contains whether carrier state changes sub indication among the MAC PDU, and the sub-head of state-transition, carrier state transition information in the described state-transition head;
Send processing unit, be used for the packet that sends to described decompressor is compressed, and the packet after described decompressor sends compression.
32, system according to claim 30 is characterized in that, described decompressor comprises:
The unit set up in second context, is used for carrying out the PHC initial context with described compressor reducer and consults, and sets up the PHC initial context;
Receive processing unit, be used to utilize described state-transition information that the packet from compressor reducer is carried out decompression.
33, system according to claim 30 is characterized in that, described compressor reducer also comprises:
First updating block is used for when status mechanism changes, and utilizes described state-transition information updating compressive state.
34, system according to claim 31 is characterized in that, described decompression also comprises:
Second updating block is used for after receiving described state-transition information, utilizes described state-transition image decompressor to upgrade decompression states.
35, system according to claim 31 is characterized in that, described decompressor also comprises:
Feedback unit is used for after receiving described state-transition information, sends feedback information to described compressor reducer.
36, the feedback processing system of head compression in a kind of wireless network is characterized in that this system comprises: compressor reducer and decompressor, wherein,
Described compressor reducer when being used for needs transformation compressive state, sends to described decompressor with state-transition information, and described state-transition information is the compression mechanism change information; After receiving feedback information, utilize described state-transition information updating compressive state from decompressor;
Described decompressor is used to utilize described state-transition information updating decompression states, and sends feedback information to compressor reducer.
37, system according to claim 36 is characterized in that, described compressor reducer comprises:
The state-transition information transmitting unit, be used for when definite needs change compressive state, send MAC PDU to described decompressor, the MAC head of described MAC PDU contains whether carrier state changes sub indication among the MAC PDU, and the sub-head of state-transition, carrier state transition information in the described state-transition head;
First updating block, be used to receive feedback information from decompressor after, utilize described state-transition information updating compressive state.
According to the described system of claim 37, it is characterized in that 38, described decompressor comprises:
Second updating block is used to utilize described state-transition information updating decompression states,
Feedback unit is used for sending feedback information to compressor reducer.
39, a kind of communication system is characterized in that, this system comprises: dispensing device and receiving system, wherein,
Described dispensing device is used for carrying out capability negotiation with described receiving system, notifies described receiving system with described self PHC tenability information in described capability negotiation process; Send connection identifier, information of classifier and corresponding PHC information to receiving system;
Described receiving system is used for carrying out capability negotiation with described dispensing device, sets up in the process at a compression mechanism described self PHC tenability information is sent to described dispensing device.
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| PCT/CN2008/073327 WO2009074101A1 (en) | 2007-12-07 | 2008-12-04 | A method, system and apparatus for processing header compression in wireless network |
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| CN 200710199032 CN101453298B (en) | 2007-12-07 | 2007-12-07 | Processing method, system and apparatus for header compression in wireless network |
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| WO2009074101A1 (en) | 2009-06-18 |
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