Directional Antenna Spatial Reuse via Distributed Scanning
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Solution Overview
Problem
Current wireless communication systems using directional antennas lack a concrete method for spatial reuse, despite the potential for improved capacity due to reduced interference and longer transmission distances.
Innovation Solution
The implementation of a method and apparatus that utilize a distributed or centralized MAC protocol to optimize spatial reuse by exchanging scanning result information elements (IEs) between devices, measuring signal strength and interference, and allocating resources based on these measurements to select the most suitable communication channels, thereby maximizing resource allocation and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If directional antennas are used to enable spatial reuse, then system capacity is improved through reduced interference and longer transmission distances, but a concrete method for spatial reuse was not suggested
Solution Approach 1:
The patent segments the spatial reuse method into distinct phases: beacon message transmission for resource information exchange, scanning result IE collection from multiple channels, interference measurement, and centralized resource allocation. This segmentation transforms the abstract concept of spatial reuse into concrete, manageable steps that devices can execute systematically
Solution Approach 2:
The patent introduces a centralized controller as an intermediary that receives scanning result IEs from multiple devices, processes interference measurements, and makes centralized resource allocation decisions. This intermediary coordinates spatial reuse across the network, resolving the complexity of multi-device coordination while maximizing system capacity
2Productivity
If resources are allocated without considering signal strength and interference measurements, then resource allocation is simple, but spatial reuse cannot be optimized
Solution Approach 1:
The patent implements preliminary actions by having devices perform scanning and measurement of signal strength and interference on multiple communication channels before resource allocation. Scanning result IEs are collected in advance, and interference measurements are taken during beacon periods, enabling informed resource allocation decisions that optimize spatial reuse
Solution Approach 2:
The patent establishes feedback mechanisms where devices transmit scanning result IEs containing measured signal strength and interference levels to the centralized controller. The controller uses this feedback to make resource allocation decisions, and devices receive allocation decisions based on their measured channel conditions, creating a closed-loop system that optimizes spatial reuse
Data Source
AI summary
Disclosed are a method for spatial reuse by support of distributed devices in a wireless communication system using a directional antenna, and an apparatus for the same. In the wireless communication system using the directional antenna, the method arranges an antenna with respect to a target device for communication before the distributed devices request a resource for communication, informs the target device or a central control unit in advance of a measurement result of a signal in MASs through the antenna, and requests a resource and receives a resource allocation based on the measurement result.