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Method and device for updating P-CSCF (proxy-call session control function) configuration of user equipment (UE) in access network system

A technology of P-CSCF and user equipment, applied in the field of updating the configuration of user equipment P-CSCF, can solve the problems of service delay, unable to provide IMS service for UE, unable to provide service, etc., and achieve the effect of high recovery efficiency

Active Publication Date: 2012-01-11
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If all the P-CSCFs given in the list cannot provide services, the network cannot provide IMS services for the UE
However, in the aforementioned way: a P-CSCF fails, causing all other user equipments under the P-CSCF to try repeatedly to the P-CSCF, and then select the P-CSCF from the P-CSCF list after finding that it cannot provide services. -CSCF
If the backup P-CSCF in the list cannot provide services, it will also cause multiple attempts by all other user equipments under it. Such multiple attempts will cause service delays

Method used

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  • Method and device for updating P-CSCF (proxy-call session control function) configuration of user equipment (UE) in access network system
  • Method and device for updating P-CSCF (proxy-call session control function) configuration of user equipment (UE) in access network system
  • Method and device for updating P-CSCF (proxy-call session control function) configuration of user equipment (UE) in access network system

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Embodiment approach

[0021] In one embodiment, UE1 sends a DHCP REQUEST (request) message, which includes the state information of the P-CSCF1, and it can define an additional DHCP option to transfer the P-CSCF1 by extending the existing DHCP protocol to a certain extent. The updated P-CSCF status information. In conjunction with the format description of the DHCP option defined in Table 1: this option is defined in the form of TLV (type code-length-value): "type code" is the corresponding type value of the P-CSCF state defined in this embodiment, occupying One byte; "length" is the actual length of the option, occupying one byte; "value" occupies the number of bytes indicated by the length, the first byte is the status update type, and when it is "1", it means that the follow-up is possible The address of the P-CSCF reached, when it is "0", it means the address of the subsequent unreachable P-CSCF. For the encoding format of the P-CSCF address, please refer to RFC3361 Dynamic Host Configuration P...

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Abstract

The invention provides a method and device for updating P-CSCF (proxy-call session control function) configuration of user equipment (UE) in an access network system. The method comprises the following steps: the UE obtains a P-CSCF list by virtue of a discovering process, selects one P-CSCF for access, monitors the working condition of the current P-CSCF, and informs a DHCP (dynamic host configuration protocol) server when the working condition of the P-CSCF changes; and the DHCP server informs the other UE using the P-CSCF in a network to update P-CSCF configuration. Therefore, when the working condition of the P-CSCF has failure, the other UE using the P-CSCF can have P-CSCF configuration updated immediately without delay caused by trial of repeated detection of the P-CSCF, P-CSCF reselection and re-registration which are carried out in sequence.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and a device for updating user equipment P-CSCF configuration under an IMS (IP Multimedia Subsystem) system in an access network. Background technique [0002] The IMS system was proposed by 3GPP in 2000. It is a subsystem supporting IP multimedia services. Its core feature is the adoption of SIP (Session Initiation Protocol) and the realization of access independence. It establishes an end-to-end session through the session initiation capability provided by the SIP protocol, and obtains the required quality of service. IMS realizes the separation of control and bearer. Through different network access methods, IMS terminal UE accesses the packet domain core network PS (WCDMA network, CDMA2000 network and fixed access network, etc.), and the PS provides SIP signaling and media Data bearer, while the core part of IMS provides session and business control. ...

Claims

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Application Information

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IPC IPC(8): H04W8/00H04W60/00H04L29/06
Inventor 姚亦峰
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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