Beacon-Based Directional Allocation in mmWave WLAN
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current mmWave wireless network technologies face challenges in directional channel access due to high overhead and latency in neighborhood discovery, especially in directional wireless communications, where existing methods are not optimized for directional transmissions and lack efficient mechanisms to reduce channel access overhead and latency.
Innovation Solution
The technology introduces mechanisms for efficient channel access in mmWave directional wireless networks by distributing time and directional allocation information through beacon signals, allowing stations to broadcast allocation and directional information, enabling stations to quickly identify available channels and reduce interference by beamforming and determining the direction of potential interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If directional wireless communications are used in mmWave networks, then channel access overhead and latency are reduced, but existing methods lack efficiency in neighborhood discovery and channel access
Solution Approach 1:
The patent applies preliminary action by having stations pre-determine and broadcast time allocation information and directional information before actual channel access occurs. This allows neighboring stations to advance knowledge of when channels will be occupied and from which directions, enabling them to plan their own transmissions accordingly and avoid collisions without lengthy discovery processes.
Solution Approach 2:
The patent introduces beacon signals as an intermediary mechanism that carries time allocation information and directional information. These beacons act as a mediator between transmitting and receiving stations, conveying scheduling information that coordinates channel access across the network without requiring direct station-to-station negotiation or lengthy discovery sequences.
2Device complexity
If directional information is distributed through beacon signals, then channel access overhead is reduced, but network coexistence and interference management become more complex
Solution Approach 1:
The patent applies universality by designing beacon signals that serve multiple functions simultaneously: they convey time allocation information, directional information, and implicit interference coordination data. This multi-functionality allows a single mechanism to address channel access efficiency while also providing the information needed for network coexistence and interference management without requiring separate specialized protocols.
Solution Approach 2:
The patent implements feedback mechanisms where stations monitor beacon signals from neighboring stations and adjust their own transmissions based on the time allocation and directional information received. This feedback loop enables dynamic adaptation to network conditions, allowing stations to coordinate their channel access and manage interference through continuous information exchange via beacons.
Data Source
Figure 1~3
Figure 4
Figure 5~6
AI summary
A wireless communication apparatus, system or method utilizing directional data transmission over a communication (e.g., mmW) band, and broadcasting time and directional allocations in each direction. Stations sending beacons containing time and directional allocations in its direction of transmission. Stations comparing beam identifications with received allocation to determine if the allocation is in the direction of reception. Stations performing receiver beamforming with a station from which a beacon was received in order to determine if the station can access the direction (channel) in its intended direction.