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Unified IMS supplementary services signaling across circuit and packet domains

A packet-switched domain and signaling technology, applied in the continuity domain, which can solve problems such as service status information transfer or complex creation

Inactive Publication Date: 2009-08-12
LUCENT TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this results in the need to transmit or create service state information in the two domains separately
the delivery or creation of such service status information is complex and can result in significant changes to deployed legacy equipment

Method used

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  • Unified IMS supplementary services signaling across circuit and packet domains
  • Unified IMS supplementary services signaling across circuit and packet domains
  • Unified IMS supplementary services signaling across circuit and packet domains

Examples

Experimental program
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Effect test

Embodiment Construction

[0020] Figure 1A Illustrated is an exemplary message flow 199 using the SIP protocol showing the notification of the multimodal terminal 100 of the waiting second voice call 101 while the multimodal terminal 100 is active in the first voice call 101 in the CS domain 110 . It is assumed that a SIP-based signaling relationship has been established between the multimode terminal 100 and the IMS 130 .

[0021] The other endpoint 140 sends the SIP Invite message 102 to the IMS 120 . The SIP Invite message 102 is a request to establish a call between the other endpoint 140 and the multimode terminal 100 .

[0022] The IMS 120 processes the SIP Invite message 102 and sends the SIP Invite message 103 to the multimode terminal 100 via the CS domain 110 . The SIP Invite message 102 preferably includes the directory number of the other endpoint 140 .

[0023] The SIP Invite message 103 can be over 1000 bytes in length. The available bandwidth through the CS domain 110 typically provi...

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PUM

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Abstract

The present invention provides a method for signaling between an IP Multimedia Subsystem (IMS) and a multi-mode terminal using concise primitives to support the use of IMS-based services while the multi-mode terminal is attached to either the packet switched (PS) domain or to the circuit switched (CS) domain, or moves between these domains. The present invention enables the maintenance of services state in only the IMS and in the multi-mode terminal, thus avoiding the creation or transfer of services state information as the multi-mode terminal moves between the PS and CS domains.

Description

technical field [0001] The present invention relates generally to providing uniform access to and continuity of supplementary services via an efficient signaling mechanism when a terminal moves between packet and circuit domains of a network. Background technique [0002] With the advent of IP-based services in telephony networks, there is the problem of providing access to and continuity of supplementary services as terminals move between the packet-switched (IP-based) and traditional circuit-switched domains of the network. The problem is twofold. The requirement for uniform access to supplementary services comes from the circuit and packet domains. Supplementary services and unified access to them must obviously continue as terminals transition between circuit-switched and packet-switched access networks. [0003] Traditional circuit-switched networks will continue to exist for several years. Terminals are being designed to attach circuit and packet domains to newer ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08
CPCH04L29/08648H04L29/06217H04W88/06H04L29/08108H04W4/16H04W80/10H04L65/1016H04L67/04H04L67/51H04L65/1095H04L65/40
Inventor D·L·巴克莱M·F·多兰R·P·埃扎克R·J·汤普森
Owner LUCENT TECH INC