WO2010017749A1

WO2010017749A1 - Method and apparatus for negotiating data compression algorithm through cx or sh interface

Info

Publication number: WO2010017749A1
Application number: PCT/CN2009/073125
Authority: WO
Inventors: 马春燕
Original assignee: 华为技术有限公司
Priority date: 2008-08-12
Filing date: 2009-08-06
Publication date: 2010-02-18
Also published as: CN101355554A

Abstract

A method and apparatus for negotiating data compression algorithm through Cx or Sh interface is provided by the embodiment of the present invention, which includes that: a data providing network element acquires the compression algorithm supported by a data requiring network element; the data providing network element judges whether said compression algorithm is supported by itself or not, if yes, the negotiation is successful, and the data providing network element adopts said compression algorithm to compress the data required by the data requiring network element. A data providing network element is also provided by the embodiment of the present invention. The embodiment of the present invention enables both sides of exchanging data to select a more intelligent and more appropriate flow according to the practical situation through a dynamic negotiation way, thereby avoids the complexity of the data configuration and makes the data exchanging mechanism more flexible. Compressing the data by the negotiated compression algorithm, can reduce the bandwidth resources occupation of the Cx/Sh interface and improve the interface performance, and it is especially suitable for the storing type network element transmitting large packages of data volume frequently.

Description

Method for negotiating data compression algorithm through Cx or Sh interface

This application claims the priority of the Chinese application filed on August 12, 2008, the application number is 200810030124.9, and the invention is entitled "Method and Apparatus for Negotiating Data Compression Algorithm by Cx or Sh Interface", the entire contents of which are incorporated herein by reference. In the application. Technical field

The present invention relates to the field of communications, and in particular, to a method and apparatus for negotiating a data compression algorithm through a Cx or Sh interface. Background technique

In IMS (IP-based Multimedia Subsystem), User Data (User-Data) and its associated service data are concentrated in the Home Subscriber Server (HSS). The HSS is a network database that supports user registration and stores user identity, location data, and trigger policy information. The HSS is also responsible for user authentication and authorization control information for network access.

Referring to Figure la, the service call control function S-CSCF uses the Cx interface from the HSS.

(Diameter protocol bearer) Obtain the user's contract data flow (SAR/SAA) as follows:

1. SAR: The S-CSCF sends a user registration/deregistration request message to the HSS;

2. SAA: The HSS returns a user registration/logout response message to the S-CSCF, carrying the user's subscription data. The user's subscription data is described in XML (extensible Markup Language) format.

Since the amount of data downloaded by Cx is related to the subscription data of the user, and the user data is encoded by XML, the amount of data is large, which causes the transmission to occupy a large amount of bandwidth resources, and the performance of the Cx interface is also affected.

Referring again to FIG. 1b, the IMS service server AS obtains the user's subscription data flow (UDR/UDA, PUR/PUA) from the HSS using the Sh interface (Diameter protocol bearer) as follows: (I) The process of AS downloading subscription data and/or transparent data (transparent data, ie, HSS does not understand semantic data) from the HSS due to business processing needs

1. UDR: The AS initiates a user data read request message to the HSS.

2. UDA: The HSS returns a user data read response message to the AS, carrying the user's subscription data and transparent data. The user's subscription data and transparent data are described in XML format.

(ii) The process of updating (adding/modifying/deleting) transparent data in the HSS due to business processing needs

1. PUR: The AS initiates a user data update request message to the HSS, carrying transparent data, and the transparent data is described in an XML format;

2. PUA: The HSS returns a user data update response message to the AS.

In the above process, the amount of data downloaded by Sh is related to the subscription data of the user, and is also related to the amount of transparent data stored by the AS in the HSS. Since the amount of data is large by using the XML format encoding, the transmission consumes a large amount of bandwidth resources, Sh Interface performance is also affected. Summary of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a method and a device for negotiating a data compression algorithm through a Cx or Sh interface, and the data exchange parties can dynamically negotiate a data compression mechanism to select a smarter and more appropriate process to avoid data configuration. The complexity.

To solve the above technical problem, an embodiment of the present invention provides a method for negotiating a data compression algorithm through a Cx or Sh interface, including:

The data providing network element obtains a compression algorithm supported by the data request network element;

The data providing network element determines whether it supports the compression algorithm, and if so, the negotiation is successful, and the data providing network element uses the compression algorithm to compress the data requested by the data requesting network element. The data provides network elements, including:

An obtaining unit, configured to acquire a compression algorithm supported by the data request network element; a determining unit, configured to determine whether the data providing network element supports the compression algorithm, and if yes, determining that the negotiation is successful;

And a compression unit, configured to compress the data requested by the data requesting network element by using a compression algorithm successfully negotiated.

The embodiment of the present invention further provides a system for transmitting data through a Cx or Sh interface, including: a data requesting network element, configured to send a data request to a data providing network element, where the data request carries data supported by the data requesting network element. Compression algorithm

a data providing network element, configured to obtain a compression algorithm supported by the data requesting network element, and determine whether the data is supported by the network, and if yes, the negotiation succeeds, and the data requested by the network element is requested by the compression algorithm. Compressing; and transmitting data to the data requesting network element.

The beneficial effects of the embodiments of the present invention are that the data exchange parties can select smarter and more appropriate processes according to actual conditions through dynamic negotiation, avoiding the complexity of data configuration and making the data interaction mechanism more flexible. At the same time, the dynamic negotiation method also makes it easy to re-consult the compression algorithm even if one of the data exchange parties changes, or the compressed data changes, thereby improving the applicability of the compression algorithm negotiation. DRAWINGS

Figure la is a schematic diagram of transmitting user data through a Cx interface in the prior art;

Figure lb is a schematic diagram of transmitting user data through the Sh interface in the prior art;

2 is a schematic flowchart of a method for negotiating a data compression algorithm according to Embodiment 1 of the present invention; FIG. 3 is a schematic flowchart of a specific implementation process of Embodiment 1 of the present invention;

4 is a schematic structural diagram of an apparatus for negotiating a data compression algorithm according to Embodiment 2 of the present invention; FIG. 5 is a schematic flowchart of a method for data transmission according to Embodiment 3 of the present invention;

FIG. 6 is a schematic diagram of a specific implementation process of Embodiment 3 of the present invention. detailed description

The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

Referring to FIG. 2, a first embodiment of the present invention provides a method for negotiating a data compression algorithm through a Cx or Sh interface, including:

The data providing network element determines whether it supports the compression algorithm. If yes, the negotiation succeeds. The data providing network element uses the compression algorithm to compress the data requested by the data requesting network element; otherwise, the negotiation fails, and the negotiation is not performed. compression.

Further, the data providing network element acquires the data requesting network element to support the compression algorithm, and the data providing network element receives the request message sent by the data requesting network element, where the request message carries the compression algorithm supported by the data requesting network element. In a specific implementation, the data providing network element and the data requesting network element support the compressed user data and the corresponding compression algorithm by using the compression indication parameter carried in the request message.

In another embodiment of the present invention, the data providing network element may also cache a data compression request algorithm supported by the network element with other interaction processes of the data requesting network element. Therefore, when the data provides subsequent compression data of the network element, the compression algorithm supported by the data requesting network element is used to negotiate the compressed data.

As shown in FIG. 3, in this embodiment, the data requesting network element is an S-CSCF or an AS, and the data providing network element is an HSS.

In this embodiment, for the Cx interface, the Feature-List-ID parameter of 3GPP TS29.229v8.L0 (separated in the Supported Features parameter) needs to be extended as a compression indication parameter, as shown in the following table:

Feature bit Feature Required / Optional Description

0 Shared iFC set Optional For SAR/SAA and PPR/PPA (user registration request/response and user update request/response) command pair

1 Code indication Required For SAR/SAA and PPR/PPA command pairs

The 2~3 compression indication optionally indicates whether the S-CSCF/HSS supports compressed user data and the corresponding compression algorithm. Specifically, the Feature-List-ID parameter extension feature bits 2~3 are used as compression indication bits to indicate whether the S-CSCF/HSS supports compressed user data and a corresponding compression algorithm, for example: 00: compression is not supported; 01: gzip Compression; 10: EXI compression; 11: Reserved. The specific compression algorithm can be configured and extended as needed. The above definitions are only examples.

For the Sh interface, the Feature-List-ID parameter of 3GPP TS29.329v8.0.0 needs to be extended.

(separated in the Supported Features parameter) as a compression indicator parameter, as shown in the following table:

Indicates whether AS /HSS supports compressed user data and corresponding compression algorithms, such as: 00: compression is not supported; 01: gzip compression; 10: EXI compression; 11: reserved. The specific compression algorithm can be configured and extended as needed. The above definitions are only examples.

Referring to FIG. 3, when the data request unit is an S-CSCF, the process of the compression algorithm negotiated through the Cx interface is specifically:

1. The S-CSCF sends a SAR message to the HSS, which is extended by Supported in the message.

The Features parameter carries the specific compression algorithm supported by the S-CSCF.

2. After receiving the message, the HSS learns the specific compression algorithm supported by the S-CSCF from the compression indication bit, and then determines whether it supports the corresponding compression algorithm. If yes, the compression algorithm carried in the message is used to perform the user data. Compressed, otherwise it is not compressed.

When there are multiple compression algorithms supported by the HSS and the S-CSCF, the HSS may select a compression algorithm to compress the data in the following manner: (1) Optionally, selecting one of the commonly supported compression algorithms; 2) Selecting based on a certain rule, the rule may be pre-configured, for example, according to a specific application scenario, pre-configuring a priority list of the compression algorithm in the HSS, when

When there are multiple compression algorithms supported by the HSS and the S-CSCF, the HSS will select according to the priority list. As shown in FIG. 3, when the data request unit is an AS, the process of negotiating the compression algorithm through the Sh interface is specifically:

1. The AS sends a UDR message to the HSS, and carries the specific compression algorithm supported by the AS through the extended Supported Features parameter in the message. The message may specifically be a user data read request message.

2. After receiving the message, the HSS learns the specific compression algorithm supported by the AS from the compression indication bit, and then determines whether it supports the corresponding compression algorithm. If yes, the compression algorithm carried in the message is used to compress the user data. Otherwise it is not compressed.

When there are multiple compression algorithms supported by HSS and AS, the HSS may select a compression algorithm to compress the data in the following manner: (1) Optional, that is, select one of the commonly supported compression algorithms; (2) Based on a certain rule, the rule may be pre-configured. For example, according to a specific application scenario, a priority list of the compression algorithm is configured in advance in the HSS. When there are multiple compression algorithms supported by the HSS and the AS, the HSS Select according to the priority list.

In addition, the HSS can obtain the compression algorithm supported by the S-CSCF/AS by configuring the negotiation result for the subsequent HSS-initiated update process (Cx interface PPR/PPA, Sh interface PNR/PNA). .

In this embodiment, the data negotiation mode enables the data exchange parties to select a smarter and more appropriate process according to the actual situation, avoids the complexity of data configuration, and makes the data interaction mechanism more flexible. At the same time, the dynamic negotiation method also makes it easy to re-consider the compression algorithm even if one of the data exchange parties changes, or the compressed data changes, thereby improving the applicability of the compression algorithm negotiation.

Referring to FIG. 4, a second embodiment of the present invention provides a data providing network element, including: an acquiring unit, configured to acquire a compression algorithm supported by a data requesting network element;

a determining unit, configured to determine whether the data providing network element supports the compression algorithm, and if yes, determining that the negotiation is successful; And a compression unit, configured to compress data requested by the data request network element by using a compression algorithm that is successfully negotiated.

Further, the acquiring unit is specifically configured to obtain, from the request message sent by the received data requesting network element, a compression algorithm supported by the data requesting network element.

Further, the device is a home subscription subscriber server HSS.

In this embodiment, the data requesting network element may be an S-CSCF or an AS, and the data providing network element may be an HSS.

Referring to FIG. 5, a third embodiment of the present invention provides a method for transmitting data through a Cx or Sh interface, including:

The data providing network element determines whether it supports the compression algorithm. If yes, the negotiation is successful, and the data providing network element uses the compression algorithm to input data requested by the data request network element into the data providing network element. Transmitting the compressed data to the data requesting network element.

Further, the data providing network element sends a message to the data requesting network element, where the message carries the compression algorithm and the compressed data;

If the negotiation fails, the data providing network element sends a message to the data requesting network element, the message carrying data uncompressed indication and uncompressed data.

When the data providing network element is the home subscriber network (HSS) and the data requesting network element is the service call control function S-CSCF, the HSS and the S-CSCF exchange the Cx interface, and the request message carries a compression indication parameter, for example, Feature- List-ID parameter, the Feature-List-ID parameter The 2~3 bits of the number of flag bits are extended to a compression indicator bit, and the compression indicator bit is used to indicate whether the data providing network element and the data request network element support compressed user data and a corresponding compression algorithm.

When the data providing network element is the home subscriber network (HSS) and the data requesting network element is the service server AS, the HSS and the AS interact through the Sh interface, and the request message carries a compression indication parameter, such as a Feature-List-ID parameter. The 1-2 bits of the Feature-List-ID parameter are extended to a compression indication bit, and the compression indication bit is used to indicate whether the data providing network element and the data request network element support compressed user data and a corresponding compression algorithm. .

As shown in FIG. 6, in this embodiment, the data requesting network element is an S-CSCF or an AS, and the data providing network element is an HSS.

Referring to FIG. 6, when the data request unit is an S-CSCF, the process of data transmission through the Cx interface is specifically:

1. The S-CSCF sends a SAR message to the HSS, and carries the specific compression algorithm supported by the S-CSCF through the extended Supported Features parameter in the message. The message may specifically be a user registration/logout request message.

3. After step 1-2, the data compression algorithm of the S-CSCF and the HSS has been negotiated. If the negotiation is successful, the HSS returns an SAA message to the S-CSCF, and the used compression algorithm and the compressed user data are carried in the message. If the negotiation fails, the HSS returns an SAA message to the S-CSCF, which carries the data uncompressed indication and the uncompressed data. It can be understood that the compression algorithm or data uncompressed indication carried in the message is embodied in the aforementioned compression indication bit.

As shown in FIG. 6, when the data request unit is an AS, the process of data transmission through the Sh interface is specifically:

1. The AS sends a UDR message to the HSS, and carries the specific compression algorithm supported by the AS through the extended Supported Features parameter in the message. 2. After receiving the message, the HSS learns the specific compression algorithm supported by the AS from the compression indication bit, and then determines whether it supports the corresponding compression algorithm. If yes, the compression algorithm carried in the message is used to compress the user data. Otherwise it is not compressed.

3. After step 1-2, the AS and HSS data compression algorithms have been negotiated. If the negotiation is successful, the HSS returns a UDA message to the AS, and the message carries the used compression algorithm and the compressed user data. If the negotiation fails. Then, the HSS returns a UDA message to the AS, where the message carries the uncompressed data indication and the uncompressed data. It can be understood that the compression algorithm or data uncompressed indication carried in the message is embodied in the foregoing compression indication bit.

In this embodiment, the data negotiation algorithm dynamically negotiates the data compression algorithm, so that the data exchange partners can select a smarter and more appropriate process according to the actual situation, avoid the complexity of data configuration, and make the data interaction mechanism more flexible. The data is compressed and transmitted by the negotiated compression algorithm, which reduces the occupation of bandwidth resources by the Cx/Sh interface and improves the performance of the interface, especially for storage type network elements that often need to transmit large packets of data.

A fourth embodiment of the present invention provides a system for transmitting data through a Cx or Sh interface, including: a data requesting network element, configured to send a data request to a data providing network element, where the data request carries data supported by the data requesting network element. Compression algorithm

a data providing network element, configured to obtain a compression algorithm supported by the data requesting network element, and determine whether the data is supported by the network, and if yes, the negotiation succeeds, and the data requested by the network element is requested by the compression algorithm. Compressing; and transmitting data to the data requesting network element according to the result of the negotiation.

Further, the data providing network element is further configured to: if the negotiation is successful, send a message to the data requesting network element, where the message carries the compression algorithm and the compressed data; if the negotiation fails, the data is sent to the data The requesting network element sends a message carrying the data uncompressed indication and the uncompressed data.

Further, the data requesting network element is a serving call control function S-CSCF or a service server AS, and the data providing network element is a home subscription user server. In this embodiment, the data negotiation algorithm dynamically negotiates the data compression algorithm, so that the data exchange parties can select a smarter and more appropriate process according to the actual situation, avoid the complexity of data configuration, and make the data interaction mechanism more flexible. At the same time, the dynamic negotiation method also makes it possible to re-consider the compression algorithm even if one of the data exchange parties changes or the compressed data changes, thereby improving the applicability of the compression algorithm negotiation.

A person skilled in the art can understand that all or part of the steps of implementing the above embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium. , including the following steps:

The data providing network element determines whether the supporting algorithm supports the compression algorithm. If yes, the negotiation succeeds, and the data providing network element uses the compression algorithm to compress the data requested by the data requesting network element by using the storage medium mentioned above. It is a read-only memory, a disk or a disc.

The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or within the technical scope disclosed by the present invention. Alternatives are intended to be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

Claim

1. A method for negotiating a data compression algorithm through a Cx or Sh interface, comprising:

The data providing network element determines whether the data is supported by the network element, and if yes, the negotiation is successful, and the data providing network element uses the compression algorithm to compress the data requested by the data requesting network element.

The method according to claim 1, wherein: the data providing network element obtains a compression algorithm supported by the data requesting network element, and specifically includes:

The data providing network element receives the request message sent by the data requesting network element, where the request message carries the compression algorithm supported by the data requesting network element.

The method according to claim 2, wherein: the request message indicates, by using the carried compression indication parameter, whether the data providing network element and the data requesting network element support compressed user data and a corresponding compression algorithm. .

4. The method according to claim 3, wherein: the compression indication parameter is

Feature-List-ID parameter.

5. The method of claim 2, wherein:

When the data providing network element is the home subscription subscriber server HSS and the data requesting network element is the service call control function S-CSCF, the HSS and the S-CSCF interact through the Cx interface.

6. The method according to claim 5, wherein the request message is a user registration/logout request message.

7. The method of claim 2, wherein:

When the data providing network element is the home subscriber network server HSS and the data requesting network element is the service server AS, the HSS and the AS interact through the Sh interface.

8. The method according to claim 7, wherein the request message is a user data read request message.

The method according to claim 1, wherein when there are multiple compression algorithms supported by the data providing network element and the data requesting network element, the method further includes: the data providing network element adopts the following manner One of them to choose a compression algorithm to compress the data:

Select one of the commonly supported compression algorithms; or select based on pre-configured rules.

10. The method according to claim 9, wherein the pre-configured rules are specifically selected according to a priority list.

The method according to claim 1, wherein the method further comprises: the data providing network element transmitting data to the data requesting network element according to a result of the negotiation.

12. A data providing network element, comprising:

An obtaining unit, configured to acquire a compression algorithm supported by the data request network element;

a determining unit, configured to determine whether the data providing network element supports the compression algorithm, and if yes, determining that the negotiation is successful;

The data providing network element according to claim 12, wherein: the acquiring unit obtains a compression algorithm supported by the data requesting network element from a request message sent by the received data requesting network element.

The data providing network element according to claim 12, wherein: the device is a home subscription subscriber server HSS.

A system for transmitting data through a Cx or a Sh interface, the method comprising: a data requesting network element, configured to send a data request to a data providing network element, where the data request carries data supported by the data requesting network element Compression algorithm

16. The system according to claim 15, wherein: said data providing network element further And, if the negotiation fails, sending a message to the data requesting network element, where the message carries data uncompressed indication and uncompressed data.

The system according to claim 15 or 16, wherein: the data requesting network element is a serving call control function S-CSCF or a service server AS, and the data providing network element is a home subscriber network (HSS).