IMS Paging Message Service Identification for Multi-SIM Terminals
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Solution Overview
Problem
In 5G mobile communication systems, terminals equipped with multiple SIM cards face challenges in effectively processing paging messages, as they lack information about the associated data or service, leading to inefficient service handling and potential service satisfaction issues.
Innovation Solution
The proposed solution involves network nodes, such as the AMF and SMF, receiving information about incoming IMS services and transmitting this information to terminals, enabling them to determine the service type within the paging message, thus allowing for appropriate response and service handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the terminal receives paging messages without service identification information, then the paging message can be received by multiple terminals, but the terminal cannot determine which service the paging message is associated with, leading to inefficient processing
Solution Approach 1:
The network node performs preliminary actions by including service identification information (such as service type indicators for voice call, video call, or SMS) in the paging message before the terminal receives it. This allows the terminal to proactively determine the service type and prepare appropriate handling procedures in advance, eliminating the need for additional information request-exchange cycles and improving processing efficiency.
2Reliability
If the paging message contains sensitive information, then the information can be transmitted to the called terminal, but other terminals may also receive and potentially exploit this personal information
Solution Approach 1:
The paging message is segmented into multiple parts: a first paging message containing only non-sensitive information (such as service type identification) that can be broadcast to multiple terminals, and a second paging message containing sensitive information (such as personal identifiers) that is transmitted only to the specific called terminal. This segmentation ensures that sensitive information is not exposed to unnecessary terminals while still allowing efficient service type identification.
Solution Approach 2:
Different quality levels of information are applied to different parts of the paging message based on their sensitivity requirements. Non-sensitive service identification information is provided in a format accessible to all terminals, while sensitive personal information is provided in a restricted format accessible only to the called terminal. This local quality differentiation maintains both security and operational ease.
Data Source
AI summary
One disclosure of the present specification provides a method for a network node to perform communication related to an IMS. The method may include: a step for receiving first information indicating that a terminal is requesting information related to an incoming IMS service; a step for receiving an SIP message related to the IMS service for the terminal; a step for transmitting second information related to the incoming IMS service for the terminal; and a step for transmitting the SIP message to a UPF node.