Coordinated Multi-AP Signal Transmission via Q-Matrix Mapping
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Solution Overview
Problem
Current wireless local area network (WLAN) systems face challenges in efficiently controlling multiple access points (APs) for signal transmission, particularly in high-throughput environments, where existing methods struggle to optimize antenna mapping and cyclic shifts across multiple APs, leading to suboptimal performance in multi-AP transmission scenarios.
Innovation Solution
A method where a master AP determines and communicates a Q matrix and cyclic shift values to slave APs, enabling efficient mapping and transmission of STF and LTF symbols, allowing for coordinated multi-AP transmission and improved interference management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple APs transmit signals independently without coordinated control, then each AP can operate autonomously, but interference between APs increases and transmission efficiency decreases
Solution Approach 1:
A master AP is introduced as an intermediary to coordinate slave APs. The master AP determines Q-matrix mapping and cyclic shift values, then communicates these parameters to slave APs, enabling coordinated transmission without direct peer-to-peer interference management between slave APs.
Solution Approach 2:
The system uses parameter optimization by determining specific Q-matrix mappings and cyclic shift values for each antenna of slave APs. These parameter adjustments enable efficient signal transmission and interference management across multiple APs operating in the same frequency band.
2Device complexity
If slave APs transmit signals without centralized coordination, then system complexity is reduced, but antenna mapping optimization and interference management deteriorate
Solution Approach 1:
The system segments control functions by designating one master AP to handle complex coordination tasks (Q-matrix determination, cyclic shift assignment) while slave APs execute simplified transmission based on received parameters. This segmentation optimizes transmission efficiency without requiring all APs to have full coordination capabilities.
3Productivity
If centralized control is implemented through a master AP, then transmission efficiency and interference management improve, but control complexity and signaling overhead increase
Solution Approach 1:
Slave APs receive pre-determined Q-matrix mapping and cyclic shift values from the master AP, enabling them to autonomously configure their antenna mappings and transmission parameters without requiring continuous centralized control or complex real-time coordination, thus reducing ongoing control complexity.
Data Source
AI summary
In a wireless local area network (LAN) system, a sharing access point (AP) can determine a Q-matrix related to a first antenna of a first shared AP, a second antenna of the first shared AP, a third antenna of a second shared AP, and a fourth antenna of the second shared AP. The sharing AP can transmit, to the first shared AP, a first value related to the first antenna and a second value related to the second antenna in the Q-matrix. The sharing AP can transmit, to the second shared AP, a third value related to the third antenna and a fourth value related to the fourth antenna in the Q-matrix.