Joint Nulling Beamforming Multi-AP WLAN Coordination
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Solution Overview
Problem
Wireless local area networks (WLANs) face challenges in efficiently managing resources to provide bandwidth and response times due to multiple devices sharing resources, with limitations from communication protocols and hardware bandwidth, especially when operating with both newer and legacy protocols.
Innovation Solution
The proposed solution involves a radio architecture that integrates WLAN and Bluetooth functionalities, using joint nulling and joint beamforming techniques across multiple access points to optimize downlink transmissions, allowing for efficient coexistence and resource allocation in WLANs operating with various protocols and standards, including Extremely High Throughput (EHT) protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple devices share the same wireless resources, then network coverage and device connectivity are improved, but resource efficiency and bandwidth availability deteriorate
Solution Approach 1:
The patent segments the wireless transmission space by creating directed beams toward specific stations and nulls toward interfering stations. This spatial segmentation allows multiple devices to share the medium simultaneously without interference, resolving the contradiction between connectivity and resource efficiency
Solution Approach 2:
The patent transitions from traditional omnidirectional or sector-based transmission to three-dimensional spatial beamforming with nulls. By adding the dimension of spatial precision in multiple directions simultaneously, the system achieves both improved connectivity and resource efficiency
2Productivity
If joint beamforming and joint nulling are implemented across multiple access points, then transmission efficiency and interference management are improved, but system complexity and coordination requirements worsen
Solution Approach 1:
The patent merges the beamforming and nulling operations into a unified joint processing framework across multiple access points. By combining these functions and coordinating them through centralized or distributed control, the system achieves high transmission efficiency while managing complexity through integration
Solution Approach 2:
The access points are designed with multi-functional capabilities to perform both beamforming and nulling operations simultaneously. This universality reduces overall system complexity by eliminating the need for separate dedicated systems for each function
3Adaptability or versatility
If WLAN operates with both newer protocols and legacy device protocols, then compatibility and market coverage are improved, but performance optimization and resource utilization worsen
Solution Approach 1:
The patent applies different transmission strategies tailored to specific stations regardless of their protocol type. By optimizing beamforming and nulling parameters locally for each station's capabilities, the system achieves both compatibility and performance optimization simultaneously
Data Source
AI summary
Embodiments of an access point (AP), station (STA) and method of communication are generally described herein. An AP may be configurable to operate as a master AP of a multi-AP group comprising the master AP and one or more satellite APs. The master AP may select, from the multi-AP group, a set of APs that is to communicate with a STA in accordance with joint processing. The master AP may allocate one or more spatial streams to each of the APs of the set of APs for a joint transmission of a null data packet (NDP) to the STA for channel sounding. The master AP may transmit an NDP announcement (NDPA) that indicates that the APs of the set of APs are to perform the joint transmission of the NDP.