WO2013102336A1

WO2013102336A1 - Rohc channel configuration method and device

Info

Publication number: WO2013102336A1
Application number: PCT/CN2012/075803
Authority: WO
Inventors: 史学红
Original assignee: 中兴通讯股份有限公司
Priority date: 2012-01-05
Filing date: 2012-05-21
Publication date: 2013-07-11
Also published as: CN102448116A

Abstract

Disclosed is a robust header compress (ROHC) channel configuration method, receiving an ROHC channel configuration request, the request carrying an ROHC channel configuration parameter; judging whether an ROHC channel exists; if yes, then reconfiguring and initializing a compressed context according to the ROHC channel configuration parameter in the configuration request, otherwise, establishing a new ROHC channel according to the ROHC channel configuration parameter. Also disclosed is an ROHC channel configuration device. The solution of the present invention reduces the memory space releasing process during the deletion of an original ROHC channel as well as the memory space applying process during the establishment of a new ROHC channel, thus saving time, improving radio link reconfiguration efficiency and reducing service delay.

Description

Robust head compression channel configuration method and device

The present invention relates to the field of mobile communications, and more particularly to a robust header compression channel configuration method and apparatus. Background technique

Due to physical conditions, the wireless link in the mobile communication system has a lower transmission rate and a higher bit error rate than the wired link. In order to effectively utilize limited wireless channel bandwidth resources, ROHC (Robust Header Compress) is introduced. The core of ROHC is to transparently compress and decompress the information in the packet header between directly connected nodes by using information redundancy between packets of the traffic flow. The ROHC technology is described by the RFC 3095 document of the Internet Engineering Task Force (IETF) and was revised by the IETF in February 2007. The revised document is RFC4815.

The IETF defines the ROHC framework in RFC 5795, which describes the ROHC channel parameters.

LARGE_CIDS: This parameter indicates whether the context identifier used by the current ROHC channel is large cid or small cid. If large cid is used, the value of the MAX_CID parameter must be greater than 15, otherwise it must be less than or equal to 15.

MAX_CID: This parameter indicates the maximum context identifier that the current ROHC channel compressor and decompressor can use. It also indicates that the compressor and decompressor can support the compression decompression context of MAX_CID+1. Currently MAX_CID ranges from 0 to 16383.

PROFILES: A set of compressed decompressed packet stream types that the ROHC channel can support. A separate profile indicates that the channel supports packet decompression of a certain type of protocol. For example, 0x0001 indicates support for ROHCv ROHC version 1. RFC 3095) IP/UDP/RTP Type packet flow. Any element in the parameter consists of 16 bits, and the upper 8 bits represent the version (0 means ROHCvl, 1 means ROHCv2), and the lower 8 bits indicate supported profiles, where 1 is IP/UDP/RTP type, 2 is IP/ UDP type, 3 is IP/ESP type, 4 is IP type, 5 is auxiliary IP/UDP/RTP link layer type, 6 is IP/TCP type, 7 is IP/UDP-Lite type, 8 is IP/UDP -Lite/RTP type.

Maximum Reconstructed Reception Unit (MRRU): indicates the largest segmented compressed packet supported by the current ROHC channel in bytes. Since the link layer has a limit on the length of data transmitted, once the compressed data generated by the ROHC is generated, This parameter needs to be configured when the packet is transmitted directly from the link layer. If it is 0, it means that the segmentation is not supported, and the segmented compressed packet received at this time must be discarded.

Robust header compression techniques are applicable to wireless networks and may exist in wireless terminals or in wireless networks. A wireless communication system differs from a wired communication system in that the user equipment is mobile. Therefore, when establishing a wireless communication system, it is necessary to consider the mobility of the user equipment. Wireless communication systems can cope with the movement of user equipment from one area to another or to respond to changing wireless environments. When the LTE-SCDMA needs to be changed, the RRC (Radio Resource Control) layer or the lower layer for managing radio resource control must send information for configuring the new radio link to the user equipment. . Therefore, the wireless terminal may be reconfigured in the wireless environment, such as the handover of the mobile network side device, or a better cell causes the terminal to switch to the new cell, and the network will receive the weight of the terminal. Configuration.

The ROHC channel parameters may be reconfigured while reconfiguring the wireless link. However, in the 3GPP and RFC protocols, how to reconfigure the ROHC channel parameters is not proposed. Therefore, it is common practice to delete the original ROHC channel and then re-based it. The new parameters establish the ROHC channel. However, the user does not change or end the currently used service during the entire link reconfiguration process. For example, the VOIP call is always in progress throughout the process. It is obviously not a wise move to re-establish the ROHC channel and delete it. This will increase. The delay of the call affects the user's calling experience. same, If the user is currently using a packet data service (PS, Packet Service) service, such as downloading a movie, a long-term outage may occur.

As can be seen from the above description, the ROHC channel will be reconfigured. If you simply delete the current channel and then establish a new configuration channel, it will increase the delay of the service that the user is currently holding. Even the delay-sensitive service may be Interruption, seriously affecting the user's experience. Summary of the invention

The technical problem to be solved by the present invention is to provide a method and apparatus for robust head compression channel configuration to solve the problem of user service delay in channel configuration.

To solve the above technical problem, the present invention provides a robust header compression channel configuration method, the method comprising:

Receiving a ROHC channel configuration request, where the ROHC channel configuration parameter is carried;

Determine whether the ROHC channel exists;

When it is determined that the ROHC channel exists, reconfigure and initialize the compression context according to the ROHC channel configuration parameter in the configuration request, otherwise the ROHC channel is newly established according to the ROHC channel configuration parameter.

Further, the ROHC channel configuration parameter includes a parameter (LARGE_CIDS) for indicating a context identifier size, a parameter (MAX_CID) for indicating a maximum context identifier, a parameter (PROFILES) for indicating a supported packet stream type set, and a maximum Recombination unit (MRRU).

Further, when determining that the ROHC channel exists, the method further includes: deleting a compression and decompression context in which the context identifier in the original ROHC channel is greater than the MAX_CID in the configuration request.

Further, when determining that the ROHC channel exists, the method further includes: deleting the compression and decompression context corresponding to the PROFILES of the original ROHC channel but not belonging to the template (rofile) of the PROFILES in the configuration request.

Further, when determining that the ROHC channel exists, the method further includes: deleting feedback data to be sent. In order to solve the above technical problem, the present invention further provides a robust header compression channel configuration apparatus, the apparatus comprising: a configuration request receiving module, a channel judging module, and a channel configuration processing module;

a configuration request receiving module, configured to receive a ROHC channel configuration request, where the ROHC channel configuration parameter is carried;

a channel judging module, configured to determine whether a ROHC channel exists;

The channel configuration processing module is configured to reconfigure and initialize the compression context according to the channel configuration parameter in the configuration request when determining that the ROHC channel exists, or create a new ROHC channel according to the channel configuration parameter.

Further, the device further includes an invalid data clearing module, configured to delete a compression and decompression context in which the context identifier in the original ROHC channel is greater than the MAX_CID in the configuration request when determining that the ROHC channel exists.

Further, the device further includes an invalid data clearing module, configured to delete the compression and decompression context corresponding to the profile of the PROFILES of the original ROHC channel but not the profile of the PROFILES in the configuration request when determining that the ROHC channel exists.

Further, the device further includes an invalid data clearing module, configured to delete the feedback data to be sent when determining that the ROHC channel exists.

Compared with the prior art, the method and device for reconfiguring the ROHC channel of the present invention reduce the need to release memory space when the original ROHC channel is deleted, and need to apply for a memory space process when creating a new ROHC channel, saving time and increasing the weight of the wireless link. The efficiency of the allocation reduces the business delay. DRAWINGS

1 is a schematic flowchart of Embodiment 1 of a method for configuring a robust header compression channel according to the present invention; 2 is a schematic flowchart of deleting a context of an invalid CID in Embodiment 2 of a method for configuring a robust header compression channel according to the present invention;

3 is a schematic flowchart of a context corresponding to an invalid profile in Embodiment 3 of the method for configuring a robust header compression channel according to the present invention;

4 is a block diagram showing the structure of a first embodiment of a robust head compression channel configuration apparatus according to the present invention; FIG. 5 is a block diagram of a second embodiment of a robust head compression channel configuration apparatus according to the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

Example 1

The scheme of Embodiment 1 of the ROHC channel configuration method according to the present invention will be further described in detail below with reference to FIG.

Step S101: Receive an ROHC channel configuration request, where the ROHC channel configuration parameter is carried, and proceed to step S102;

In this embodiment, the ROHC channel configuration request may be received through the reconfigured interface or the existing ROHC channel configuration interface. Here, if the ROHC channel already exists, it is considered to reconfigure the current ROHC channel.

The ROHC channel configuration parameters include a parameter for indicating a context identifier size (LARGE_CIDS ), a parameter for indicating a maximum context identifier (MAX_CID ), a parameter for indicating a supported set of packet stream types (PROFILES ), and a maximum reassembly unit ( MRRU).

Step S102: Whether the ROHC channel configuration parameter is legal, if it is legal, the process proceeds to step S103, otherwise proceeds to step S104;

Step S103: Whether the ROHC channel exists, if yes, proceed to step S106, otherwise proceed to step S105;

Step S104: The ROHC channel configuration parameter is incorrect, the return channel configuration fails, and the process ends. Step S105: creating a new ROHC channel, proceeding to step S112;

Step S106: Reconfigure the ROHC channel parameter LARGE_CIDS according to the LARGE_CIDS in the configuration request, and proceed to step S107;

Step S107: Reconfigure the ROHC channel parameter MAX_CID according to the MAX_CID in the configuration request, and proceed to step S108;

Step S108: Reconfigure the ROHC channel parameter PROFILES according to the PROFILES in the configuration request, and proceed to step S109;

Step S109: Reconfigure the ROHC channel parameter MRRU according to the MRRU in the configuration request, and proceed to step S110;

Step S110: deleting the unsent feedback data, and proceeding to step S111;

Unsent feedback data will be invalidated due to reconfiguration of ROHC channel configuration parameters. Deleting unsent feedback data can free up memory space. This step is optional.

Step S111: setting the initialization and refresh (IR, Initialization and Refresh) of all compression contexts to be true (TRUE), so that receiving new packet data to be compressed can send an IR message, and proceeding to step S112;

The operation of this step initializes the remaining compression context.

The above steps S106 to S111 have no prior order limitation.

Step S112: The ROHC channel reconfiguration process ends.

Example 2

The ROHC channel configuration method embodiment 2 of the present invention is different from the above embodiment 1. In step S107, before or after the MAX_CID is reconfigured according to the MAX_CID in the configuration request, the method further includes deleting the context identifier in the original ROHC channel to be greater than the Configuring the compression/decompression context of the MAX_CID (also referred to as NewMaxCid) in the request, thereby releasing the content space occupied by the invalid compression or decompression context, that is, the CID larger than the MAX_CID in the configuration request is invalid CID . As shown in Figure 2, the process for deleting the invalid CID context specifically includes: Step S201: Acquire the newly configured MAX_CID value NewMaxCid, proceeds to step S202; Step S202: Obtain the MAX_CID value OldMaxCid of the original ROHC channel, proceeds to step S203;

Step S203: determining whether NewMaxCid is less than OldMaxCid, if yes, proceeding to step S204, otherwise proceeding to step S206;

Step S204: deleting the context in the compressed context whose identifier is greater than NewMaxCid, and proceeding to step S205;

Step S205: deleting the context in the decompression context whose identifier is greater than NewMaxCid, and proceeding to step S206;

Step S206: The process of deleting the context in which the CID is greater than NewMaxCid ends.

Example 3

The ROHC channel configuration method embodiment 3 of the present invention is different from the above embodiment 1. In step S108, before or after reconfiguring the ROHC channel parameter PROFILES according to the PROFILES in the configuration request, the method further includes deleting the PROFILES belonging to the original ROHC channel but not The compression/decompression context corresponding to the template (rofile) of the PROFILES in the configuration request, thereby releasing the content space occupied by the invalid compression or decompression context, that is, the PROFILES belonging to the original ROHC channel but not belonging to the configuration request. The profile of PROFILES is an invalid profile.

As shown in FIG. 3, the process of deleting the context corresponding to the invalid profile specifically includes: Step S301: Acquire a newly configured PROFILES set aPrfsNew, go to step S302; Step S302: Obtain the PROFILES set aPrfsOld of the original ROHC channel, and proceed to step S303;

Step S303: The first template value in the acquisition aPrfsOld is recorded as Prf_Val, and proceeds to step S304; Step S304: determining whether Prf_Val belongs to the aPrfsNew collection, if yes, proceeding to step S307, otherwise proceeding to step S305;

Step S305: deleting the context in the compression context whose template value is Prf_Val, and proceeding to step S306;

Step S306: Delete the context in which the template value in the decompression context is Prf_Val, and enter the step.

S307;

Step S307: determining whether there is an uncompared template in the aPrfsOld set, if yes, proceeding to step S308, otherwise proceeding to step S309;

Step S308: The next template value in the acquisition aPrfsOld is recorded as Prf_Val, and proceeds to step S304;

Step S309: The process of deleting the context corresponding to the invalid template ends.

The preferred embodiment is that, in addition to reconfiguring according to the ROHC channel configuration parameter in the configuration request, deleting the compression decompression context in the original ROHC channel that is greater than the reconfiguration MAX_CID and not in the reconfiguration PROFILES set, and The remaining compression context needs to be initialized, and the feedback data to be sent is deleted, thereby saving the channel configuration time, releasing the memory space occupied by the invalid data, and improving the efficiency of compression and decompression.

Corresponding to the above method, the present invention further provides a robust header compression channel configuration apparatus embodiment 1, as shown in FIG. 4, the apparatus includes: a configuration request receiving module, a channel judging module, and a channel configuration processing module, where

a request request receiving module, configured to receive a robust head compression (ROHC) channel configuration request, where the ROHC channel configuration parameter is carried;

The channel configuration processing module is configured to reconfigure and initialize the compression context according to the channel configuration parameter in the configuration request when determining that the ROHC channel exists, or create a new ROHC channel according to the channel configuration parameter. Specifically, the ROHC channel configuration parameter includes a parameter (LARGE_CIDS) for indicating a context identifier size, a parameter (MAX_CID) for indicating a maximum context identifier, a parameter (PROFILES) for indicating a supported packet stream type set, and a maximum Reorganization unit (MRRU).

Preferably, in the robust head compression channel configuration device embodiment 2, different from the device embodiment 1 shown in FIG. 4, as shown in FIG. 5, the device further includes an invalid data clearing module for determining the ROHC. When the channel exists, the invalid data after channel reconfiguration is cleared.

Corresponding to the foregoing method embodiment 1, the invalid data clearing module is configured to delete the feedback data to be sent when determining that the ROHC channel exists.

Corresponding to the foregoing method embodiment 2, the invalid data clearing module is further configured to: when determining that the ROHC channel exists, delete a compression and decompression context in which the context identifier in the original ROHC channel is greater than the MAX_CID in the configuration request.

Corresponding to the foregoing method embodiment 3, the invalid data clearing module is further configured to: when determining that the ROHC channel exists, delete the compression and solution corresponding to the PROFILES of the original ROHC channel but not the template (rofile) of the PROFILES in the configuration request. Compress the context.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be accomplished by instructions to the associated hardware, which may be stored in a computer readable storage medium, such as a read only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.

Compared with the prior art, the ROHC channel reconfiguration method and apparatus of the present invention have the following advantages:

It reduces the need to free up memory space when the original ROHC channel is deleted and needs to apply for memory space when creating a new ROHC channel, saving time and improving the efficiency of wireless link reconfiguration.

In the case where the user's current business changes are small, most of the compression and decompression are directly used. Hereinafter, the efficiency of compression and decompression after radio link reconfiguration can be improved;

Enhance the user experience during the mobile process or during the wireless environment change.

The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A robust header compression channel configuration method, the method comprising: receiving a robust head compression (ROHC) channel configuration request, wherein the ROHC channel configuration parameter is carried;

Determine whether the ROHC channel exists;

2. The method according to claim 1, wherein the ROHC channel configuration parameter includes a parameter (LARGE_CIDS) for indicating a context identifier size, a parameter (MAX_CID) for indicating a maximum context identifier, and is used for indicating support. Parameters of the set of packet stream types

(PROFILES) and the largest reorganization unit (MRRU).

The method according to claim 1, wherein when the ROHC channel is determined to exist, the method further includes: deleting a compression and decompression context in which the context identifier in the original ROHC channel is greater than the MAX_CID in the configuration request.

The method according to claim 1, wherein when the ROHC channel is determined to exist, the method further comprises: deleting a template corresponding to the PROFILES of the original ROHC channel but not belonging to the PROFILES in the configuration request (rofile) Compress and decompress the context.

The method according to claim 1, wherein when the ROHC channel is determined to exist, the method further comprises: deleting the feedback data to be sent.

A device for configuring a robust header compression channel, the device comprising: a configuration request receiving module, a channel judging module, and a channel configuration processing module;

a configuration request receiving module, configured to receive a lu ROHC channel configuration request, where the ROHC channel configuration parameter is carried;

a channel judging module, configured to determine whether the ROHC channel exists, and notifying the channel of the judgment result Configuring a processing module;

7. The apparatus according to claim 6, wherein the ROHC channel configuration parameter includes a parameter (LARGE_CIDS) for indicating a context identifier size, a parameter (MAX_CID) for indicating a maximum context identifier, and is used for indicating support. Parameters of the set of packet stream types

(PROFILES) and the largest reorganization unit (MRRU).

The device of claim 6, further comprising: an invalid data clearing module, configured to delete, when the ROHC channel is present, a compression in which the context identifier in the original ROHC channel is greater than the MAX_CID in the configuration request , decompress the context.

9. The apparatus according to claim 6, wherein the apparatus further comprises an invalid data clearing module, configured to delete a PROFILES belonging to the original ROHC channel but not belonging to the PROFILES in the configuration request when determining that the ROHC channel exists The template corresponds to the compression, decompression context.

The device according to claim 6, wherein the device further comprises an invalid data clearing module, configured to delete the feedback data to be sent when determining that the ROHC channel exists.