CN101453298B - 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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- CN101453298B CN101453298B CN 200710199032 CN200710199032A CN101453298B CN 101453298 B CN101453298 B CN 101453298B CN 200710199032 CN200710199032 CN 200710199032 CN 200710199032 A CN200710199032 A CN 200710199032A CN 101453298 B CN101453298 B CN 101453298B
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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, particularly a kind of processing method of header compression in wireless network, system and device.
Background technology
Due to 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 using the IP technology in the wireless area environment, 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 grouping.So not only waste bandwidth, also increased the probability that grouping is dropped because 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 of the grouping of same stream territory has identical thresholding.ROHC gets a reference packet in certain stream, only send for other groupings the information that in the leader territory, the relative reference grouping changes, and reaching the compression purpose, thereby more effectively utilizes bandwidth.Simultaneously, ROHC makes this header compression mechanism have validity and the rational robustness of height also by controlling frequency and the means such as quantity, the nonsynchronous strict logic of detection and error checking and correction of 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).In the U pattern, communication is unidirectional, and the compressor state migration does not rely on feedback; In the O pattern, negative feedback is compulsory; In the R pattern, positive feedback and negative feedback are all compulsory.
But, more than ROHC can only be operated in the IP layer, and can't carry out to the packet of Ethernet the head compression.Simultaneously, the operating efficiency of ROHC is not high, and the Floor layer Technology of wireless network is in conjunction with defective tightness.
Data packet head compression (Packet Header Suppression, PHS) be a pullover compression mechanism, can compress different profile on a plurality of IP layers, also support the head compression that the Ethernet bag is carried out, 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), data packet head compression mask (Packetheader suppression mask, PHSM), data packet head compressed index (Packet headersuppression index, PHSI), 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, then transmits with the Bit String after the alternative PHSF of a shorter PHSI and PHSM combination on eating dishes without rice or wine, 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 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 present invention is to provide a kind of processing method of header compression in wireless network and system, device, can realize carrying out the head compression and can carry out state to the parameter that compression mechanism changes changing below the IP layer.
The processing method of a kind of header compression in wireless network that the embodiment of the present 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 to carry out decompression to the packet from described compression end.
The feedback method for treating of a kind of header compression in wireless network that the embodiment of the present 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 present invention provides comprises:
Transmitting terminal and receiving terminal carry out capability negotiation, at transmitting terminal described in described capability negotiation process and receiving terminal, the PHC tenability of self are informed the opposite end;
Set up in process at service 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 a kind of header compression in wireless network that the embodiment of the present 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 the packet of compression to described decompressor;
Described decompressor is used for setting up the PHC initial context with described compressor reducer; Utilize described state-transition information to carry out decompression to the packet from compressor reducer.
The feedback processing system of a kind of header compression in wireless network that the embodiment of the present invention provides comprises: compressor reducer and decompressor, wherein,
Described compressor reducer when being used for needing to change compressive state, sends to described decompressor with state-transition information, and described state-transition information is the compression mechanism change information; After receiving the feedback information from decompressor, utilize described state-transition information updating compressive state;
Described decompressor is used for utilizing 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, in a compression mechanism is set up process, described self PHC tenability information is sent to described dispensing device.
In the embodiment of the present 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 to carry out decompression to the packet from compression end.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 present invention method;
Fig. 2 is the form of the state-transition head of the embodiment of the present invention;
Fig. 3 is a signaling message form schematic diagram of the setting of the embodiment of the present invention;
Fig. 4 is another signaling message form schematic diagram of the setting of the embodiment of the present invention;
Fig. 5 is the structural representation of the MAC PDU of the embodiment of the present invention;
Fig. 6 is the idiographic flow schematic diagram that compression end and decompressor end are set up the PHC initial context;
Fig. 7 illustrates the idiographic flow schematic diagram of embodiment of the present invention parameter negotiation for the scene take network-triggered as example;
Fig. 8 upgrades the schematic flow sheet of compressive state for changing in the rear compressive state of PHC initial context foundation take descending scene as the example embodiment of the present invention;
Fig. 9 is the treatment system structural representation of a kind of header compression in wireless network of the embodiment of the present invention;
Figure 10 is the feedback processing system configuration schematic diagram of the header compression in wireless network of the embodiment of the present invention;
The structural representation of a kind of communication system that Figure 11 provides for the embodiment of the present invention.
Embodiment
In embodiments of the present invention, after having set up the PHC initial context between compression end and decompressor end, if the initial compression parameter of consulting in the PHC initial context is set up process changes, when namely 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 to carry out decompression to the packet from compression end.
Shown in Figure 1, the method for the embodiment of the present invention comprises the following 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 media 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 in MAC PDU, whether carrier state changes the indication of sub, and the sub-head of state-transition, shown in Figure 2, carrier state transition information in 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, in Fig. 2, state-transition head can also comprise: the CRC code, or, by the eap-message digest of the generation of the shared key between transmitting terminal and receiving terminal.Therefore, before described decompressor end was carried out decompression, decompressor end can first utilize the CRC code of described state-transition information and described eap-message digest that compression end is verified, and after being verified, then carry out decompression.
Can utilize the sub-head of idle bit position indicating status transformation in the MAC head.But because the idle bit on the MAC head only has one, in order to satisfy follow-up protocol extension, can make up indicating status to change sub-head the idle bit position in the MAC head and extendible sub-header field (ESF).
In addition, due to MAC SDU in the process that becomes MAC PDU, may be divided or combination, and in the embodiment of the present invention, utilize the sub-head of state-transition in MAC PDU, control the compression on MAC SDU level, so the relative position of state-transition head and MAC SDU need to be determined.
Shown in Figure 2 is that to utilize idle bit position indicating status in the MAC head to change the son head be example, 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.In Fig. 2, the sequence number of state-transition information can be the sequence number of PHC (SN), index when this sequence number is used for feedback.
Step 103: described decompressor end utilizes described state-transition information to carry out decompression to the packet from compression end.
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 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 way 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 in MAC PDU, whether carrier state changes the indication of sub, and the sub-head of state-transition.Therefore, after decompressor end is received described MAC PDU, if contain the indication of state-transition head in described MAC PDU, can utilize the state-transition information in state-transition head in 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 when special time or event occur again:
Decompressor end adopts former compressive state mechanism to compress or do not compress MAC PDU, not only comprises the indication of state-transition head in 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 event and occurs, upgrades compressive state, after this, can utilize the compressive state after 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 event and occur according to described compression mechanism, utilize the decompression states of described state-transition information updating decompressor end, and utilize the decompression states after upgrading to carry out decompression to the time of described compression mechanism variation indication or the packet from described compression end after the event generation.
The third is compression end after receiving that decompressor end is upgraded feedback, then upgrades decompression states, 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 in MAC PDU, whether carrier state changes the indication of sub, 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 to compression end, wherein contain the renewal result; Compression end can determine whether to upgrade compressive state according to the renewal result in described feedback information, if definite decompressor end is upgraded, compression end recycles described state-transition information updating compressive state.
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, after described compression end transmission MAC PDU is to described decompressor end, after decompressor end is received described MAC PDU, send feedback information to compression end, wherein contain reception result; Compression end determines whether to upgrade compressive state according to the reception result in described feedback information, if, 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 immediately decompression states.
Here, described decompressor end can send feedback information to described compression end by the signaling message that arranges, 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 content format (the not comprising the MAC head) schematic diagram that the signaling message of setting comprises.Shown in Figure 3, this informational message can comprise: the reception result of the dynamic parameter that CID, PHC1 and PHCI are corresponding (Reception Result), PHC SN and CRC code.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, shown in Figure 4, if in connection identifier, a plurality of graders and corresponding PHCI are arranged, and CRC calculates for a PHC parameter set, so also need to indicate the PHCI that feeds back.
And, can be by the MAC PDU carrying feedback information of expansion, the MAC PDU after decompressor end utilization expansion is to the compression end feedback information.Fig. 5 is the structural representation of the MAC PDU after expanding.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 result (Reception Result), PHC sequence number (SN), CRC code.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 PHC head.
When compression end is end side, decompressor end is 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 code to terminal.Can also comprise HMAC or CMAC.
When compression end is network side, decompressor end is 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 to end side and be used to indicate downlink resource distribution (DL-MAP) message that terminal is carried out the specific physical resource of PHC feedback, and therefore, terminal can send feedback information on the specific physical resource of network side appointment.
For 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, if terminal has feedback information, send feedback information to network side.And, may further include the indication that whether sends in described feedback information, if described feedback information does not send, network side is described terminal distribution resource always, until the feedback information of described terminal is sent.
Certainly, network side can adopt polling mode to send UL-MAP message to described terminal, also can after receiving the feedback request of terminal, send UL-MAP message to terminal.
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 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 with terminal, i.e. PHC static parameter; The parameter of dynamic traffic aided, i.e. PHC dynamic parameter.
The PHC static parameter can be in entering 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, namely dynamically change on the maximum of ability, the PHSS of compressed parameter, connection identifier grader or the maximum of PHCI, the support of PHC feedback capability, the feedback form of support, the CRC algorithm of supporting, the header compression mode of supporting, as: header compression mode is PHS, PHC or ROHC etc.
The PHC dynamic parameter can be set up in 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 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.
Carry out having consulted the PHC static parameter in basic capability negotiation process in step 601, and the initial value of PHC dynamic parameter.After this, when update mode changed, namely the PHC dynamic parameter changed.
Take SBC alternately as the negotiations process of example explanation static parameter:
MS sends basic capacity request (SBC-REQ) message to 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, PHC static parameter that simultaneously also can carried terminal; GW returns to the information that BS asks; BS sends basic capacity response (SBC-RSP) message to MS, carries the PHC static parameter of BS.So far, terminal and Access Network have obtained mutually basic PHC ability information, and the parameter in 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 to connect 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, to described compression end feedback DSA response message, set up the reception result of message, further can also comprise the reception result of each PHC parameter comprising connection.
Fig. 7 is the detailed process of the explanation embodiment of the present invention parameter negotiation as an example of the scene of network-triggered example.Shown in Figure 7, the detailed process of embodiment of the present invention parameter negotiation is as follows:
Step 701: network-triggered entity triggers BS, require to connect foundation, the entity of network-triggered shown in figure is GW; This step can be carried above-mentioned PHC dynamic parameter, if still the PHC dynamic parameter is controlled by BS fully, can not carry dynamic parameter;
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 on a connection identifier, the PHC dynamic parameters of overlapping may be arranged more.
Step 703: after terminal is received DSA-REQ message, the PHC dynamic parameter is resolved, the PHC dynamic parameter of revising if necessary can send the DSA that carries the PHC dynamic parameter that needs modification and respond (DSA-RSP) message to Access Network; 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 confirmation if the PHC dynamic parameter in DSA-RSP is revised, can also carry this modification information; If controlled by BS fully, do not need.
Step 705: the network-triggered entity comprehensively judges, provides final PHC dynamic parameter.If controlled by BS fully, do not need this step.
Step 706: the transmission DSA in 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 step 705 is sent to terminal.
In the wireless network of the embodiment of the present invention, the process of PHC initial context method for building up can realize like this:
Transmitting terminal and receiving terminal carry out capability negotiation, at transmitting terminal described in described capability negotiation process and receiving terminal, the PHC tenability of self are informed the opposite end; In a compression mechanism was set up process, described transmitting terminal was set up message to the connection that receiving terminal sends the PHC information that contains connection identifier, information of classifier and correspondence.
Fig. 8 upgrades the process of compressive state for illustrating that as an example of descending scene example embodiment of the present invention compressive state after the PHC initial context is set up changes.Shown in Figure 8, the detailed process of the embodiment of the present 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 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 result.After step 803 and 804, just set up the initial context of PHC between terminal and Access Network.
Step 805: when Access Network is received downlink data, the downlink data of receiving is carried out buffer memory, then carry out a squeeze operation according to above-mentioned initial context, and whether the data packet head that detects downlink data variation occurs, and whether satisfied the demand of state-transition.
Step 806: in case find that the data packet head of downlink data changes, and satisfy the demand of state-transition, need to increase a sub-head in MAC back of described downlink data packet, the PHC parameter after upgrading is notified to MS.
Step 807: if consulted feedback and feedback model between MS and Access Network, after terminal receives above-mentioned son head, verify, i.e. CRC or eap-message digest checking, terminal feeds back to Access Network with the result; If feedback needs resource to distribute, Access Network can be the terminal distribution feedback resources in advance.
To set up at service connection the foundation that realizes compression mechanism in process in above embodiment, namely 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 is nervous) 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 the head compression has been used, cancel by DSC-REQ/RSP the head compression that this eats dishes without rice or wine to connect.
Shown in Figure 9, the treatment system of a kind of header compression in wireless network that the embodiment of the present 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 the packet of compression to described decompressor;
Described decompressor 92 is used for setting up the PHC initial context with described compressor reducer; Utilize described state-transition information to carry out decompression to the packet from compressor reducer.
Described compressor reducer 91 comprises: unit 911, state-transition information transmitting unit 912 and transmission processing unit 913 set up in the first context.
Unit 911 set up in the 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, be used for when determining to need to change compressive state, send MACPDU to described decompressor, the MAC head of described MAC PDU contains in MAC PDU, whether carrier state changes the indication of sub, and the sub-head of state-transition, carrier state transition information in described state-transition head;
Transmission processing unit 913 is used for the packet that sends to described decompressor is compressed, and the packet after compressing to described decompressor transmission.
Described compressor reducer 91 can also comprise: the first updating block 914 is used for utilizing described state-transition information updating compressive state when status mechanism changes.
Described decompressor 92 can comprise: unit 921 and reception ﹠ disposal unit 922 set up in the second context.
Unit 921 set up in the second context, is used for carrying out the PHC initial context with described compressor reducer and consults, and sets up the PHC initial context;
Reception ﹠ disposal unit 922 is used for utilizing described state-transition information to carry out decompression to the packet from compressor reducer.
Described decompression 92 can also comprise: the 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 is used for sending feedback information to described compressor reducer after receiving described state-transition information.
Shown in Figure 10, the feedback processing system of the header compression in wireless network of the embodiment of the present invention can comprise: compressor reducer 11 and decompressor 12, wherein,
Described compressor reducer 11 when being used for determining to need to change compressive state, sends to decompressor with state-transition information, and described state-transition information is the compression mechanism change information; After receiving the feedback information from decompressor, utilize described state-transition information updating compressive state;
Described decompressor 12 is used for utilizing 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, be used for when determining to need to change compressive state, send MACPDU to described decompressor, the MAC head of described MAC PDU contains in MAC PDU, whether carrier state changes the indication of sub, and the sub-head of state-transition, carrier state transition information in described state-transition head;
The first updating block 112 after being used for receiving the feedback information from decompressor, utilizes described state-transition information updating compressive state.
Described decompressor 12 can comprise:
The second updating block 121 is used for utilizing described state-transition information updating decompression states,
Feedback unit 122 is used for sending feedback information to compressor reducer.
A kind of communication system shown in Figure 11, that the embodiment of the present 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 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 to carry out decompression to the packet from compression end, therefore, can carry out in real time state 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 present 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 present invention and parameters is only 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 and not break away from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of claim of the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and modification interior.
Claims (34)
1. the processing method of a header compression in wireless network, is characterized in that, the 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 to carry out decompression to the packet from described compression end;
Described compression end sends to decompressor end with state-transition information, comprise: 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 in MAC PDU, whether carrier state changes the indication of sub, and the sub-head of state-transition, carrier state transition information in described state-transition head, or, the sequence number of carrier state transition information and state-transition information.
2. method according to claim 1, 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.
3. method according to claim 1, is characterized in that, described state-transition head also comprises: cyclic redundancy check (CRC) codes,
Before described decompressor end was carried out decompression, the method further comprised:
Described decompressor end utilizes described CRC code that compression end is verified.
4. method according to claim 1, is characterized in that, described state-transition head also comprises: by the eap-message digest of the generation of the shared key between transmitting terminal and receiving terminal;
Before described decompressor end was carried out decompression, the method further comprised:
Described decompressor end utilizes described eap-message digest that compression end is authenticated.
5. 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.
6. method according to claim 1, is characterized in that, when needing to change compressive state, described compression end utilizes described state-transition information directly to upgrade compressive state, and adopt the compressive state after upgrading that described MAC PDU is compressed,
Described decompressor end utilizes described state-transition information to carry out decompression to the packet from compression end, comprising:
After described decompressor end is received described MAC PDU, if contain the indication of state-transition head in described MAC PDU, utilize the state-transition information in state-transition head in described MAC PDU, upgrade decompression states, and utilize the decompression states after upgrading that described MAC PDU is decompressed.
7. method according to claim 1, is characterized in that, described MAC PDU adopts former compressive state mechanism to compress or do not compress, and, comprise further also in 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 event and occurs;
When described decompressor end changes time of indication or event and occurs according to described compression mechanism, utilize the decompression states of described state-transition information updating decompressor end, and utilize the decompression states after upgrading to carry out decompression to the time of described compression mechanism variation indication or the packet from described compression end after the event generation.
8. method according to claim 1, it is characterized in that, described MAC PDU adopts former compressive state mechanism to compress or do not compress, after described compression end transmission MAC PDU is to described decompressor end, before described decompressor end utilized described state-transition information to carry out decompression to the packet from compression end, the method further comprised:
After decompressor end is received described MAC PDU, utilize described state-transition information updating decompression states, and send feedback information to compression end, wherein contain the renewal result;
Compression end determines whether to upgrade compressive state according to the renewal result in described feedback information, and if so, compression end is utilized described state-transition information updating compressive state.
9. method according to claim 1, it is characterized in that, described MAC PDU adopts former compressive state mechanism to compress or do not compress, after described compression end transmission MAC PDU is to described decompressor end, before described decompressor end utilized described state-transition information to carry out decompression to the packet from compression end, the method further comprised:
After decompressor end is received described MAC PDU, send feedback information to compression end, wherein contain reception result;
Compression end determines whether to upgrade compressive state according to the reception result in described feedback information, if, 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.
10. method according to claim 8, is characterized in that, described decompressor end sends feedback information by the signaling message that arranges 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.
11. method according to claim 8, it is characterized in that, when decompressor end is network side, when compression end is end side, described decompressor end further comprises before sending feedback information by specific physical resource to compression end: network side sends to contain to end side and is used to indicate the downlink resource assignment messages that terminal is carried out the specific physical resource of PHC feedback.
12. method according to claim 8 is characterized in that, when decompressor end is end side, when compression end was network side, decompressor end further comprised before sending feedback information to compression end on specific resource:
Network side sends the ascending resource assignment messages to terminal;
When terminal is received described ascending resource assignment messages, if terminal has feedback information, send feedback information to network side.
13. method according to claim 12, it is characterized in that, described feedback information also comprises the indication whether feedback information sends, if described feedback information does not send, network side is described terminal distribution resource always, until the feedback information of described terminal is sent.
14. method according to claim 12 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 receiving the feedback request of terminal, sends the ascending resource assignment messages to terminal.
15. the method for claim 1 is characterized in that, described compression end and decompressor end are set up data packet head compression PHC initial context, comprising:
Compression end and decompressor end are carried out capability negotiation, in compression end described in described capability negotiation process and decompressor end, the PHC tenability of self are informed the opposite end;
In a compression mechanism was set up process, described compression end was set up message to the connection that decompressor end sends the PHC information that contains connection identifier, information of classifier and correspondence.
16. method according to claim 15 is characterized in that, sends to decompressor end in compression end after the connection contain connection identifier, information of classifier and corresponding PHC information sets up message, the method further comprises:
Described decompressor end is to the reception result of described compression end feedback for each PHC information.
17. method according to claim 15 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 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.
18. method according to claim 17 is characterized in that, described PHC information also further comprises: the Message Digest 5 relevant parameter of employing, and/or, CRC algorithm relevant parameter.
19. the feedback method for treating of a header compression in wireless network is characterized in that, the 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;
Described compression end sends to decompressor end with state-transition information, comprise: described compression end sends MACPDU to described decompressor end, wherein the MAC head of MAC PDU contains in MAC PDU, whether carrier state changes the indication of sub, and the sub-head of state-transition, carrier state transition information in described state-transition head, or, the sequence number of carrier state transition information and state-transition information.
20. method according to claim 19 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.
21. method according to claim 19 is characterized in that, described state-transition head also comprises: the CRC code,
Before described decompressor end was carried out decompression, the method further comprised:
Described decompressor end utilizes described CRC code that compression end is verified.
22. method according to claim 19 is characterized in that, described state-transition head also comprises: by the eap-message digest of the generation of the shared key between transmitting terminal and receiving terminal;
Before described decompressor end was carried out decompression, the method further comprised: described decompressor end utilizes described eap-message digest that compression end is authenticated.
23. method according to claim 19 is characterized in that, described state-transition information comprises: PHCI and corresponding dynamic parameter modification value.
24. method according to claim 19, it is characterized in that, described decompressor end sends feedback information by the signaling message that arranges to described compression end, or, send feedback information by the MAC PDU after expansion to described compression end, or, send feedback information by specific physical resource to compression end.
25. method according to claim 19, it is characterized in that, when decompressor end is network side, when compression end is end side, described decompressor end further comprises before sending feedback information by specific physical resource to compression end: network side sends the sub-head of PHC feedback by the physical resource of downlink resource assignment messages notification terminal PHC feedback to terminal.
26. method according to claim 19 is characterized in that, when decompressor end is end side, when compression end was network side, decompressor end further comprised before sending feedback information to compression end on specific resource:
Network side sends the ascending resource assignment messages to terminal;
When terminal is received described ascending resource assignment messages, if terminal has feedback information, send feedback information to network side, the indication that whether sends comprising feedback information, if described feedback information does not send, network side is described terminal distribution resource always, until the feedback information of described terminal is sent.
27. method according to claim 26, 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 receiving the feedback request of terminal, sends ascending resource to terminal and distributes UL-MAP message.
28. the treatment system of a header compression in 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 the packet of compression to described decompressor;
Described decompressor is used for setting up the PHC initial context with described compressor reducer; Utilize described state-transition information to carry out decompression to the packet from compressor reducer;
Described compressor reducer comprises:
The unit set up in the 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 in MAC PDU, whether carrier state changes the indication of sub, and the sub-head of state-transition, carrier state transition information in described state-transition head;
The transmission processing unit is used for the packet that sends to described decompressor is compressed, and the packet after compressing to described decompressor transmission.
29. system according to claim 28 is characterized in that, described decompressor comprises:
The unit set up in the second context, is used for carrying out the PHC initial context with described compressor reducer and consults, and sets up the PHC initial context;
The reception ﹠ disposal unit is used for utilizing described state-transition information to carry out decompression to the packet from compressor reducer.
30. system according to claim 28 is characterized in that, described compressor reducer also comprises:
The first updating block is used for utilizing described state-transition information updating compressive state when status mechanism changes.
31. system according to claim 28 is characterized in that, described decompressor also comprises:
The second updating block is used for after receiving described state-transition information, utilizes described state-transition image decompressor to upgrade decompression states.
32. system according to claim 28 is characterized in that, described decompressor also comprises:
Feedback unit is used for sending feedback information to described compressor reducer after receiving described state-transition information.
33. the feedback processing system of a header compression in wireless network is characterized in that, this system comprises: compressor reducer and decompressor, wherein,
Described compressor reducer when being used for needing to change compressive state, sends to described decompressor with state-transition information, and described state-transition information is the compression mechanism change information; After receiving the feedback information from decompressor, utilize described state-transition information updating compressive state;
Described decompressor is used for utilizing described state-transition information updating decompression states, and sends feedback information to compressor reducer;
Described compressor reducer comprises: the state-transition information transmitting unit, be used for when determining to need to change compressive state, send MAC PDU to described decompressor, the MAC head of described MAC PDU contains in MAC PDU, whether carrier state changes the indication of sub, and the sub-head of state-transition, carrier state transition information in described state-transition head;
The first updating block after being used for receiving the feedback information from decompressor, utilizes described state-transition information updating compressive state.
34. system according to claim 33 is characterized in that, described decompressor comprises:
The second updating block is used for utilizing described state-transition information updating decompression states,
Feedback unit is used for sending feedback information to compressor reducer.
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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 |
| 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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