Wireless Device Spatial Reuse via Signal Quality Assessment
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Solution Overview
Problem
The increasing density of wireless devices and limited spectrum in wireless local-area networks (WLANs) lead to performance degradation due to overlapping signal coverages, necessitating enhanced spatial reuse techniques to optimize bandwidth and response time.
Innovation Solution
A wireless device apparatus and method that measure received signal quality, determine required signal quality based on packet headers, and initiate spatial reuse by transmitting overlapping signals in time and frequency with received packets, even before the payload is fully received, to improve resource re-utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless devices wait for complete packet reception before transmitting, then signal quality and decoding accuracy are maintained, but spatial reuse efficiency and bandwidth utilization deteriorate
Solution Approach 1:
The system performs preliminary assessment of received signal quality during packet reception, determining whether spatial reuse can occur before the complete packet is received. This preliminary action enables early transmission decisions based on header information and initial signal quality measurements, improving spatial reuse efficiency while maintaining reliability thresholds.
Solution Approach 2:
The system transmits signals partially overlapping with received packets when signal quality conditions are met, rather than waiting for complete packet reception. This partial action approach allows bandwidth utilization to improve while ensuring that transmissions only occur when they will not compromise the reliability of ongoing communications.
2Productivity
If wireless devices transmit signals overlapping in time and frequency with received packets, then spatial reuse and bandwidth utilization improve, but signal quality and decoding reliability may deteriorate
Solution Approach 1:
The system continuously monitors received signal quality and compares it against required quality thresholds for correct decoding. This feedback mechanism ensures that spatial reuse transmissions are only permitted when they will not compromise the decoding reliability of ongoing packets, maintaining reliability while enabling bandwidth utilization improvements.
Solution Approach 2:
The system dynamically adjusts transmission parameters based on real-time signal quality measurements. By changing transmission conditions based on measured parameters, the system ensures that spatial reuse operations maintain adequate signal quality and decoding reliability while improving overall bandwidth utilization.
3Measurement precision
If wireless devices assess signal quality from complete packets, then decoding accuracy is ensured, but response time and resource re-utilization efficiency deteriorate
Solution Approach 1:
The system performs preliminary signal quality assessment during packet reception using header information and initial signal measurements, rather than waiting for complete packet reception. This preliminary action reduces response time while maintaining sufficient measurement precision to ensure decoding accuracy when spatial reuse is permitted.
Solution Approach 2:
The system segments the packet reception process into assessable portions, evaluating signal quality from received segments rather than requiring complete packet reception. This segmentation approach enables earlier transmission decisions while maintaining adequate measurement precision through cumulative signal quality assessment.
Data Source
AI summary
A wireless device performs spatial reuse in a wireless local area network. When receiving a packet, the wireless device measures a received signal quality from a first portion of the packet, and determines a required signal quality for correctly decoding a payload of the packet based on information in a packet header. The wireless device compares the received signal quality with the required signal quality. If the received signal quality is lower than the required signal quality, the wireless device transmits a signal that overlaps in time and in frequency with a second portion of the packet. Alternatively, a wireless device may identify a Basic Service Set Identification (BSSID) of a received packet. If the BSSID indicates that the packet is an inter-BSS packet, the wireless device transmits a signal overlapping in time and in frequency with the packet before reception of a frame check sequence (FCS) in the packet.