Wireless Terminal Control Channel Grouping for VoIP Overhead Reduction
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing control and feedback overhead, particularly when handling a large number of VoIP users, as they are not designed to handle the increased number of voice packets, which can lead to reduced speech quality and system overload.
Innovation Solution
The solution involves grouping wireless communication terminals based on radio channel conditions and terminal characteristics, assigning different control channels to each group, and using a resource assignment control channel to indicate which sub-frames and frames terminals should monitor for radio resource assignments, thereby reducing control signaling overhead and improving resource allocation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of VoIP users is increased by using smaller packet sizes, then system capacity is improved, but control and feedback overhead increases significantly
Solution Approach 1:
The patent combines multiple control functions into a single shared control channel that serves multiple users. Instead of having separate control channels for each user, the system merges resource allocation, channel quality feedback, and acknowledgment mechanisms into a unified control structure that handles multiple VoIP users efficiently, thereby reducing overall control overhead while maintaining system capacity
Solution Approach 2:
The shared control channel is designed to perform multiple functions simultaneously - resource allocation, channel quality reporting, and acknowledgment signaling - for multiple users. This multi-functional approach allows the system to support increased VoIP user capacity without proportionally increasing control overhead, as the same control infrastructure serves multiple purposes
2Manufacturing precision
If dedicated control signaling is used for each user, then resource allocation precision is improved, but device complexity increases
Solution Approach 1:
The patent segments users into different groups based on their service requirements and channel conditions. Each group is assigned specific resource allocation patterns and control channel configurations. This segmentation allows the system to maintain precise resource allocation for each user group while using a simplified control structure, rather than implementing complex dedicated control for every individual user
Solution Approach 2:
Different control strategies and resource allocation schemes are applied to different user groups based on their specific requirements. Voice users receive different treatment than data users, and users with different channel qualities receive customized resource allocation. This localized approach maintains allocation precision where needed while simplifying control for other users, reducing overall system complexity
Data Source
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AI summary
A method in a wireless communication terminal (102) comprises determining an assignment of a radio resource to the terminal based on information in a control channel associated with a group to which the terminal is assigned by a wireless communication infrastructure entity (112), determining a radio resource mapping for the terminal based on information on the control channel and receiving resource assignment control channel information (310, 312, 314, 316). The control channel information indicates which frame (210, 220, 230) and corresponding sub-frame (212, 232, 300) to monitor for radio resource assignments. A wireless communication terminal is also claimed.