Unified IMS Session Transfer Request for Network Handover
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Solution Overview
Problem
Conventional techniques for transferring multimedia sessions between different network types, such as from a packet-switched access network to a combination of packet-switched and circuit-switched access networks, are inefficient due to the need for multiple sets of messages for transferring real-time and non-real-time data.
Innovation Solution
A mobile station with IMS centralized services capabilities sends a single request containing information for both packet-switched and circuit-switched domain transfers, using the SCC AS to efficiently manage the session transfer between different access networks, thereby reducing the complexity of message flows.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional techniques are used for transferring multimedia sessions between different network types, then the transfer can be performed, but multiple sets of messages are required which reduces efficiency
Solution Approach 1:
The patent combines multiple separate message flows for transferring real-time data and non-real-time data into a single unified request message. The mobile station sends one request that includes information for both packet-switched domain transfer and circuit-switched domain transfer, eliminating the need for separate message exchanges and improving transfer efficiency
Solution Approach 2:
The unified request message structure is designed to handle multiple transfer scenarios simultaneously. A single message format can accommodate transfers involving both packet-switched and circuit-switched domains, making the protocol more versatile and reducing the overall complexity of message flow management
Data Source
AI summary
A request is originated by a mobile station, wherein the request contains information relating to both packet-switched communication and circuit-switched communication of data in a session. The request is originated by the mobile station in response to detecting that a transfer is to be performed from a source packet-switched access network to a target network in which different parts of the session is to be communicated in the packet-switched domain and circuit-switched domain. The transfer is completed using the information in the first request.