Mobile Station Bearer Control for Non-IMS Network Load Reduction
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Solution Overview
Problem
Mobile stations unnecessarily increase the processing load of IP-CAN by attempting to establish connections via radio access networks that do not support IP Multimedia Subsystem (IMS) services, leading to wasteful repeated connection procedures.
Innovation Solution
A communication system and method where a mobile station receives service non-supporting information from the IP access network, which allows it to stop bearer establishment requests when connecting to a network that does not support IMS services, thereby preventing unnecessary processing loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile station always executes procedures for connection to the IP-CAN irrespective of whether the IP-CAN supports IMS services or not, then the mobile station maintains service availability, but the processing load of the IP-CAN increases wastefully
Solution Approach 1:
The network side performs preliminary action by notifying the mobile station in advance (before connection attempts) whether the IP-CAN supports IMS services. This allows the mobile station to avoid unnecessary connection procedures to non-IMS IP-CANs, reducing processing load while maintaining service availability by directing connections to IMS-capable networks.
2Ease of operation
If the mobile station attempts to establish IP-CAN Bearer via radio access network not supporting IMS, then the mobile station follows standard connection procedures, but repeated connection procedures wastefully increase processing load
Solution Approach 1:
The network side provides feedback information to the mobile station indicating whether the IP-CAN supports IMS services. The mobile station uses this feedback to intelligently decide whether to attempt connection, avoiding repeated unnecessary connection procedures to non-IMS networks and improving processing load efficiency while maintaining standard procedures for IMS-capable networks.
Data Source
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Figure 3(a)~3(b)
AI summary
Provided are a communication system, a mobile station and a communication method that can suppress the increase of processing loads of an IP-CAN accompanying trials made by mobile stations to connect to the IP-CAN via a wireless access network that does not support any services on the IP multimedia core network subsystem (IMS). For example, a UE (100) receives, from an SGSN via the 3G, service non-supporting information indicating that the 3G does not support any services on the IP multimedia subsystem, and, when having received the service non-supporting information, stops the transmission of an Activate PDP Context Requeast via the 3G.