Link Margin Control via Multi-Parameter Adjustment
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Solution Overview
Problem
Existing link adaptation methods in wireless communication systems only control link margin by changing the modulation and coding scheme, lacking diversity and effectiveness in managing link quality, especially when the link state is poor.
Innovation Solution
A method and apparatus that control link margin by receiving a link margin response frame, which includes information about the communication link, and performing operations such as changing transmission power, modulation and coding scheme, beam forming, or switching to another frequency band, based on the received information, allowing for more diverse and effective link management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If only MCS is changed to control link margin, then the control method is simple, but the link quality management effectiveness is insufficient
Solution Approach 1:
The patent applies parameter changes by modifying multiple transmission parameters simultaneously - not only MCS but also transmission power, frequency band, and beamforming settings. This multi-parameter adjustment approach resolves the contradiction by providing effective link quality management while maintaining operational simplicity through automated selection of the most appropriate parameter changes based on link margin conditions.
Solution Approach 2:
The patent implements dynamic link margin control by enabling real-time adjustment of multiple parameters (MCS, power, frequency band, beamforming) based on current link conditions. This dynamic approach allows the system to adaptively select the most effective control method for each specific situation, thereby improving link quality management effectiveness without significantly increasing operational complexity.
2Reliability
If multiple operations are used to control link margin, then the link quality management is more effective, but the system complexity increases
Solution Approach 1:
The patent applies universality by creating a unified link margin control mechanism that can perform multiple functions - adjusting MCS, transmission power, frequency band, and beamforming through a single integrated system. This multi-functional approach improves link quality management effectiveness while containing system complexity by providing a universal control framework rather than separate control mechanisms for each parameter.
Solution Approach 2:
The patent implements feedback-based control where the system continuously monitors link margin conditions and automatically selects appropriate parameter adjustments. This feedback mechanism improves link quality management effectiveness by making informed decisions about which operations to perform, while managing system complexity through automated decision-making algorithms that select from predefined control options.
3Device complexity
If MCS is the only parameter changed, then the control mechanism is simple, but the adaptability to different link conditions is limited
Solution Approach 1:
The patent applies parameter changes by enabling adjustment of multiple transmission parameters - MCS, transmission power, frequency band, and beamforming settings. This multi-parameter capability significantly improves adaptability to different link conditions, allowing the system to respond effectively to various scenarios such as fading, interference, and mobility, while maintaining reasonable control mechanism complexity through structured parameter management.
Solution Approach 2:
The patent implements dynamic adaptability by allowing real-time changes in multiple parameters based on current link conditions. The system can dynamically switch between different frequency bands, adjust beamforming directions, modify transmission power levels, and change MCS according to the specific link state, thereby achieving high adaptability while managing complexity through coordinated parameter adjustment.
Data Source
AI summary
A method and apparatus for controlling a link margin are provided. The method includes: receiving, from a second device, a link margin frame including information about the link margin related to a communication link between a first device and the second device; and performing at least one operation selected from among a change in transmission power, a change in a modulation and coding scheme (MCS), beam forming, and a change of the communication link to another frequency band, based on the received link margin frame.