IMS Data Channel Session Negotiation for Temporary Access
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Solution Overview
Problem
Existing wireless communication systems face challenges in establishing an IMS data channel session when a terminal lacks data channel service subscription information, hindering the use of IMS-data channel services.
Innovation Solution
The method involves an originating terminal processing control signals to establish an IMS data channel session based on the subscription information of a counterpart terminal, utilizing IMS servers to request and verify subscription status, allowing temporary connections when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a terminal without data channel service subscription information attempts to establish an IMS data channel session, then the terminal can access IMS data channel services, but the session establishment fails due to lack of subscription information
Solution Approach 1:
The patent introduces an IMS server as an intermediary that mediates between the terminal and the data channel service. The IMS server retrieves subscription information from a home subscriber server and uses it to determine whether to allow the data channel session, thereby enabling terminals without local subscription information to access services when authorized by the network
Solution Approach 2:
The patent implements preliminary action by having the terminal include an indication of data channel session support in its session initiation request before actual session establishment. The IMS server then performs preliminary verification by retrieving and checking subscription information from the home subscriber server, making authorization decisions before the data channel session is fully established
2Adaptability or versatility
If the system requires subscription information for data channel session establishment, then service security is maintained, but terminals without subscription information cannot access the service
Solution Approach 1:
The patent applies universality by making the IMS server perform multiple functions: it acts as a session controller, a subscription information manager, and an authorization decision-maker. The same IMS server infrastructure that handles general IMS sessions is extended to also manage data channel service authorization, eliminating the need for separate subscription management systems
Solution Approach 2:
The system implements self-service by having the terminal automatically include its data channel session support capability in the session initiation request without manual configuration. The IMS server automatically retrieves subscription information from the home subscriber server and makes authorization decisions without human intervention, enabling seamless service access
Data Source
AI summary
A method performed by a first Internet protocol (IP) multimedia subsystem (IMS) server in a wireless communication system is provided. The method includes receiving a first request message for requesting a temporary connection to an IMS data channel (IMS DC) of a first user equipment (UE), transmitting, to an home subscriber server (HSS) entity, a first subscriber information request message for requesting the first subscriber information of the first UE, receiving, from the HSS entity, a first subscriber information response message comprising the first subscriber information indicating that the first UE is not subscribed to the IMS data channel, determining whether the temporary connection to the IMS data channel of the first UE is allowed, and in response to determining to allow the temporary connection, transmitting a second request message for requesting the temporary connection to the IMS data channel of the first UE to a second IMS server.