Overlapping BSS Resource Allocation for Spectral Efficiency
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Solution Overview
Problem
In dense wireless communication deployments, existing techniques for scheduling overlapping basic service sets (OBSS) lead to inefficient resource allocation and reduced spectral efficiency due to interference and inefficient collision avoidance methods, resulting in decreased data throughput and spectral efficiency.
Innovation Solution
A method where a scheduling device determines resource unit vectors for neighboring APs based on interference patterns and BSS configurations, generating an OBSS trigger frame to coordinate multi-user transmissions, allowing APs to share resources and elongate PPDU transmissions, thereby improving spectral efficiency through spatial reuse.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If dense deployment of APs and client STAs is implemented to increase bandwidth capacity, then the system can support more users and higher data rates, but OBSS interference increases leading to reduced spectral efficiency
Solution Approach 1:
The patent segments the transmission spectrum into multiple resource units (RUs) and allocates them to different BSSs. Each BSS receives specific frequency sub-channels where it has transmission rights, effectively dividing the spectrum resource to reduce interference while maintaining high user density support
Solution Approach 2:
The patent introduces a new dimension for resource allocation by implementing time-domain scheduling across multiple BSSs. Instead of only spatial separation, APs are scheduled to transmit in different time slots on overlapping frequency channels, enabling dense deployment while managing interference through temporal separation
2Productivity
If traditional collision avoidance methods are used in OBSS scenarios, then device simplicity is maintained, but resource allocation efficiency decreases leading to reduced data throughput
Solution Approach 1:
The patent introduces a centralized scheduler as an intermediary component that coordinates resource allocation across multiple BSSs. This scheduler receives transmission requests, determines optimal time-frequency resources, and allocates resource units to APs, thereby improving throughput while centralizing the complexity rather than distributing it across devices
Solution Approach 2:
The patent implements preliminary resource allocation through scheduled transmission opportunities. Before actual data transmission, the scheduler pre-assigns resource units and time slots to APs based on predicted traffic patterns and interference conditions, optimizing resource utilization before the transmission occurs
Data Source
AI summary
Techniques for triggering multiple basic service sets (BSSs) to share resources for a coordinated transmission are described. One technique includes determining a first amount of data available to send in a first BSS and determining a second amount of data available to send in a second BSS. The first BSS and the second BSS form an overlapping BSS. An amount of resources in the first BSS that is available to share with the second BSS for a coordinated transmission from the first BSS and the second BSS is determined based on the first amount of data and the second amount of data. A frame that includes an indication of the amount of resources is generated and transmitted to at least one of the first BSS and the second BSS.