Wireless LAN Direct Link Scheduling for Multi-Link Interference
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Solution Overview
Problem
Existing wireless LAN technologies face challenges in performing simultaneous transmission and reception operations through multi-link operations due to signal interference between adjacent channels, leading to disrupted channel access operations.
Innovation Solution
A method and apparatus for direct communication in a wireless LAN system, involving the transmission and reception of frames to establish and maintain direct communication links between devices, utilizing Orthogonal Frequency Division Multiple Access (OFDMA) for data transfer, and negotiating direct communication periods to optimize channel access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-link operations are performed with adjacent channels, then frequency utilization and throughput are improved, but signal interference between adjacent channels increases causing transmission and reception operations to fail
Solution Approach 1:
The patent segments the communication operation into distinct transmission and reception phases within each link. By dividing the multi-link operation into time-separated segments where one link transmits while others receive, the system achieves high frequency utilization without adjacent channel interference, as each segment is isolated in time rather than space.
Solution Approach 2:
The patent implements periodic action by establishing a structured pattern where links alternately perform transmission and reception operations in a repeating cycle. This periodic scheduling ensures that adjacent channels do not interfere with each other while maintaining high overall throughput through continuous utilization of all links in the multi-link system.
2Productivity
If simultaneous transmission and reception operations are performed through multi-link, then communication efficiency is improved, but channel access operations are disrupted due to interference
Solution Approach 1:
The patent applies dynamics by making the communication mode flexible and adaptive rather than static. The system dynamically switches between transmission and reception states for each link based on scheduled patterns, allowing simultaneous transmission and reception operations across different links while maintaining reliable channel access through coordinated state changes that prevent interference.
Solution Approach 2:
The patent achieves continuity of useful action by ensuring that while one link is transmitting, other links are receiving, and vice versa. This continuous alternating pattern maintains high communication efficiency across the multi-link system without disrupting channel access operations, as the useful action (data transfer) continues uninterrupted across the system even if individual links are temporarily inactive.
Data Source
AI summary
Disclosed are a method and device for direct communication in a wireless LAN. An operation method of a first device comprises the steps of: transmitting a first frame, which is for setting up a direct communication link, to a second device over one or more links among multiple links; receiving a second frame, which is a response to the first frame, from the second device over the one or more links; and directly communicating with one or more peer devices over the direct communication link when the second frame is received.