Control Information Parameter Segmentation for Interference Reduction
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Solution Overview
Problem
In conventional mobile telecommunication systems, increasing transmission power for data channels leads to unnecessary interference, as control channels are not efficiently adapted, especially when beamforming is used for data transmissions, making it difficult to maintain reliable control signalling for secondary stations.
Innovation Solution
A method where control information is transmitted with different parameter sets corresponding to data transmission modes, allowing coordinated changes in control parameters to match data parameter changes, thereby reducing interference and maintaining coverage without applying beamforming to the control channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If transmission power is increased for data channels to extend coverage, then data transmission range is improved, but interference to secondary stations increases
Solution Approach 1:
The patent segments the transmission parameters into separate control information parameters and data parameters. By independently managing control information parameters (first set) and data parameters (second set), the system can extend data coverage through power increase while keeping control information transmission power separate, thus reducing interference to secondary stations.
Solution Approach 2:
The patent applies different transmission parameters to control information and data channels. Control information uses its own dedicated parameters (first set) while data uses separate parameters (second set), allowing localized optimization where control information maintains reliable transmission without being affected by data power changes.
2Length of moving object
If beamforming is applied to data transmissions to increase coverage, then data transmission range is improved, but control signalling reliability deteriorates due to phase reference issues
Solution Approach 1:
The patent segments the transmission modes into beamforming mode (for data) and normal mode (for control information). By separating these modes, the system can leverage beamforming for data coverage extension while maintaining normal, reliable control information transmission that does not depend on beamforming-specific phase references.
Solution Approach 2:
Instead of applying beamforming to control information to match data coverage (which would create phase reference problems), the patent inverts the approach by keeping control information transmission separate and using different parameters, thereby solving the reliability issue while still achieving extended data coverage through beamforming.
3Device complexity
If the same transmission parameters are used for both control and data channels, then system simplicity is maintained, but interference to secondary stations increases unnecessarily
Solution Approach 1:
The patent divides the transmission parameters into two distinct sets: first set for control information and second set for data. This segmentation allows independent optimization of each channel type, enabling the system to reduce interference to secondary stations by adjusting data parameters without affecting control information transmission.
Solution Approach 2:
The patent introduces dynamic parameter selection where the system can switch between different parameter sets based on transmission mode. The processor dynamically determines which parameter set to use for control information and which for data, allowing flexible adaptation to minimize interference while maintaining simplicity through automated parameter management.
Data Source
AI summary
The present invention relates to a method for transmission of control information from a primary station to at least one secondary station, comprising the step of transmitting with a first set of control information parameters control information corresponding to data transmission with a first set of data parameters and transmitting with a second set of control information parameters control information corresponding to data transmission with a second set of data parameters, wherein at least one control information parameter has a difference in value between the two sets of control information parameters, said difference in value having a dependency on the difference between the value of a data parameter in the first set of data parameters and the value of the data parameter in the second set of data parameters, said data parameter being a different parameter from the at least one control information parameter.