Telecommunications Channel Switching for Interference Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In UMTS terrestrial radio access networks, dedicated channels are inefficiently used due to high inactivity timers and frequent setup/takedown of channels for small data transfers, leading to low duty cycles and increased interference, especially with short 'keep alive' messages and acknowledged mode services, which worsen uplink loading and receiver performance without power control.
Innovation Solution
The method of transitioning call connections between dedicated and shared channels (FACH/RACH) based on data buffered, arrival rate, signal attenuation, and propagation delay, considering RF power requirements to optimize channel usage and reduce interference, with shared channels used for low-duty-cycle traffic and dedicated channels for high-volume transfers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dedicated channels are used for data transmission, then data transfer reliability is improved, but channel utilization efficiency deteriorates due to high inactivity timers and frequent setup/takedown
Solution Approach 1:
The patent dynamically switches between dedicated channels and shared channels based on real-time conditions such as data activity level, signal quality, and channel availability. This dynamic adaptation allows the system to optimize channel utilization while maintaining reliable data transfer when needed, resolving the contradiction between reliability and productivity.
Solution Approach 2:
The system changes operational parameters by transitioning between different channel types (dedicated vs. shared) based on measured conditions including signal attenuation, propagation delay, and data buffer status. This parameter-based switching enables efficient resource allocation while preserving transfer reliability when dedicated channels are appropriate.
2Reliability
If inactivity timer duration is increased to maintain dedicated channels, then data transfer reliability is improved, but energy consumption increases and channel efficiency deteriorates
Solution Approach 1:
The patent implements dynamic channel selection that adjusts the inactivity timer behavior based on current data activity and signal conditions. When signal quality is good and data activity is low, the system transitions to shared channels, reducing power consumption while maintaining reliability through rapid re-establishment of dedicated channels when needed.
Solution Approach 2:
The system modifies operational parameters by switching between dedicated and shared channel modes based on measured conditions including signal attenuation and propagation delay. This parameter-based approach allows the system to reduce base station power usage during low-activity periods while maintaining data transfer reliability when dedicated channels are re-established.
3Productivity
If shared channels (FACH/RACH) are used for data transmission, then channel utilization efficiency is improved, but signal interference increases due to lack of power control
Solution Approach 1:
The patent dynamically selects between shared and dedicated channels based on real-time signal quality measurements including signal attenuation and propagation delay. When signal conditions are favorable, the system uses shared channels for efficient resource utilization. When interference becomes problematic, the system transitions to dedicated channels with power control, thus resolving the contradiction between efficiency and interference.
Solution Approach 2:
The system changes operational parameters by switching channel types based on measured signal conditions. This parameter-based switching enables the system to maximize channel utilization efficiency while managing signal interference through appropriate channel selection and power control strategies.
4Adaptability or versatility
If dedicated channels are frequently set up and torn down for small data transfers, then adaptability to traffic patterns is improved, but system complexity increases and performance deteriorates
Solution Approach 1:
The patent implements a universal channel selection mechanism that handles both small and large data transfers, as well as various traffic patterns, through a single decision-making framework. This framework evaluates multiple parameters (signal quality, data activity, channel availability) to determine the appropriate channel type, reducing system complexity while maintaining adaptability to different traffic scenarios.
Solution Approach 2:
The system uses parameter-based decision making to select between dedicated and shared channels based on measured conditions including signal attenuation, propagation delay, and data buffer status. This approach provides adaptability to various traffic patterns while simplifying channel management through objective parameter thresholds.
Data Source
AI summary
A method is provided of transfer of a call connection connecting a telecommunications base station and a mobile user terminal between dedicated channels in both directions therebetween and shared channels in both directions therebetween. The transfer is made dependent upon the amount of data buffered at the base station and the user terminal for transmission therebetween and/or the rate that data arrives at the base station and user terminal for transmission therebetween. The transfer is also dependent upon the value of a measured parameter of the signals between the base station and the user terminal, the parameter being signal attenuation or propagation delay.