Wireless Transceiver Spatial Reuse via Path Loss Estimation
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Solution Overview
Problem
The increasing densification of wireless communication systems leads to increased interference between overlapping basic service sets (OBSS) due to closer BSSs, affecting overall system transmission efficiency.
Innovation Solution
A wireless transceiver device that estimates transmission path loss to an OBSS receiving node, determines a spatial reuse transmission power, and adjusts the modulation and coding scheme (MCS) index to perform spatial reuse transmissions, thereby minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If spatial reuse transmission is performed with higher transmission power to increase frequency band usage efficiency, then productivity is improved, but interference with OBSS nodes increases
Solution Approach 1:
The patent dynamically adjusts transmission power parameters based on path loss estimation. The processor estimates path loss to OBSS receiving nodes and uses this information to determine appropriate spatial reuse transmission power levels, changing the power parameter adaptively rather than using fixed high power, thus resolving the contradiction between productivity and harmful interference
Solution Approach 2:
The system implements feedback mechanisms by detecting OBSS packets and using this information to estimate path loss. This feedback loop allows the transmission device to adjust its power settings based on actual interference conditions, enabling efficient spatial reuse while controlling harmful effects on OBSS nodes
2Object-affected harmful factors
If transmission power is reduced to minimize interference with OBSS nodes, then harmful factors are reduced, but transmission efficiency decreases
Solution Approach 1:
The patent changes transmission power parameters dynamically based on estimated path loss conditions. Rather than using fixed low power, the system adjusts power levels according to actual channel conditions, achieving a balance between minimizing interference and maintaining transmission efficiency
Solution Approach 2:
The transmission power is made dynamic rather than static. The processor continuously estimates path loss and adjusts spatial reuse transmission power accordingly, allowing the system to adapt to changing conditions and optimize the balance between efficiency and interference reduction in real-time
3Measurement precision
If path loss estimation accuracy is improved to optimize spatial reuse power settings, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent uses copying techniques by measuring path loss characteristics from OBSS packets and using these copied measurements to estimate transmission conditions. This allows the system to infer path loss information without requiring complex direct measurement systems, reducing device complexity while maintaining measurement precision
Data Source
AI summary
A wireless transceiver device includes a communication module and a processor. The communication module is configured to receive and transmit radio frequency signals. The processor is coupled to the communication module and is configured to perform the following operations: estimating a receiving path loss from the wireless transceiver device to an overlap basic service set (OBSS) receiving node when detecting an OBSS packet by the communication module; determining a spatial reuse transmission power used for a spatial reuse transmission by the communication module; determining a spatial reuse modulation coding scheme (MCS) index adopted for the spatial reuse transmission according to a normal MCS index adopted in a normal transmission by the communication module and a power drop of the spatial reuse transmission power relative to the normal transmission power; and performing the spatial reuse transmission when the spatial reuse MCS index meets a predetermined condition.