OBSS Spatial Reuse via Trigger-Based PPDU and BSS Color
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing spatial reuse in high-density environments with overlapping basic service sets (OBSS), leading to ambiguity in spatial reuse field identification and inefficient use of wireless resources.
Innovation Solution
A wireless communication method and terminal that include a processor and a communication unit, which receive a trigger frame indicating uplink multi-user transmission and transmit a trigger-based PHY protocol data unit (PPDU) with spatial reuse parameters for OBSS terminals. The spatial reuse parameters are used to adjust transmission power and optimize data speed in overlapping BSS environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If spatial reuse operation is performed in overlapping basic service sets, then wireless resource utilization is improved, but ambiguity in spatial reuse field identification occurs
Solution Approach 1:
The patent introduces a BSS color field parameter that changes to uniquely identify different basic service sets. By assigning distinct color values (parameters) to overlapping BSSs, the system enables clear identification and spatial reuse operations without ambiguity, directly resolving the identification problem while maintaining high resource utilization
Solution Approach 2:
The BSS color field acts as an intermediary element between the physical layer and MAC layer, carrying identification information that mediates the spatial reuse decision-making process. This intermediary field allows terminals to quickly identify whether received signals are from intra-BSS or inter-BSS sources, enabling efficient spatial reuse without complex processing
2Productivity
If trigger-based PPDU is transmitted with spatial reuse parameters, then transmission efficiency is improved, but device complexity increases
Solution Approach 1:
The AP performs preliminary actions by pre-calculating and embedding spatial reuse parameters (such as SRP - Spatial Reuse Parameter) in the trigger frame before uplink transmission. This preliminary preparation allows terminals to directly use the provided parameters for power control and spatial reuse decisions, improving transmission efficiency while minimizing terminal processing complexity through parameter provisioning rather than complex calculation requirements
Data Source
AI summary
The present invention relates to a wireless communication method and a wireless communication terminal for a spatial reuse operation of an overlapping basic service set, and more particularly, to a wireless communication method and a wireless communication terminal for supporting a spatial reuse operation of an overlapping basic service set to efficiently use a wireless resource.To this end, provided are a wireless communication terminal including: a processor; and a communication unit, wherein the processor receives a trigger frame indicating an uplink multi-user transmission, and transmits a trigger-based PHY protocol data unit (PPDU) in response to the received trigger frame, wherein the trigger-based PPDU comprises a spatial reuse parameter for spatial reuse operation of an overlapping basic service set (OBSS) terminal and a wireless communication method using the same.