MBMS Control Information Indication for Mobile Terminal Channel Switching
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Solution Overview
Problem
In UMTS networks, mobile terminals frequently receive unnecessary MBMS control information, leading to data loss as they cannot distinguish between relevant and irrelevant control messages, causing them to switch channels unnecessarily.
Innovation Solution
A method is introduced where mobile terminals receive a control information indication message with attribute information, such as service IDs, update information, and timing, to determine whether to switch to and process the point-to-multipoint control channel for relevant MBMS control messages, thereby minimizing unnecessary channel switches and data loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mobile terminals receive all MBMS control information messages, then complete control information is obtained, but unnecessary channel switching and data loss occur due to receiving irrelevant control messages
Solution Approach 1:
The patent applies preliminary action by transmitting attribute information (service ID, message type, timing) in advance within the control information indication message. This allows mobile terminals to pre-determine whether to switch to the point-to-multipoint control channel based on their subscribed services, avoiding unnecessary channel switching and data loss while ensuring relevant control information is received reliably
2Loss of information
If mobile terminals switch to point-to-multipoint control channel frequently, then all control information is received, but channel switching overhead and data loss increase
Solution Approach 1:
The indication message provides timing information in advance, allowing terminals to plan channel switching only when necessary. This preliminary notification enables terminals to maintain their current channel longer and switch only when relevant control information is indicated, reducing unnecessary switching overhead and time loss
3Adaptability or versatility
If mobile terminals process all control information messages, then complete service control is achieved, but processing complexity and power consumption increase
Solution Approach 1:
The patent extracts only the essential attribute information (service ID, message type, timing) from control information messages and includes it in the indication message. This allows terminals to extract and process only the attributes relevant to their subscribed services, filtering out irrelevant messages before full processing, thereby reducing computational complexity and power consumption while maintaining complete service control
Data Source
AI summary
To minimize data loss as a mobile terminal unnecessarily reads an MBMS control channel (MCCH) in the course of receiving MBMS data, an MBMS control information reception indication message comprising attribute information of control information for an MBMS service is transmitted to the mobile terminal. The mobile terminal then selectively reads the MCCH to receive the control information according to the attribute information contained in the indication message.