AP Transmission Opportunity Sharing for OBSS Interference Control
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Solution Overview
Problem
Existing communication technologies face challenges in managing overlapping basic service sets (OBSS) due to inefficient channel access and interference, leading to reduced transmission efficiency and increased delay in dense deployment scenarios.
Innovation Solution
A method and apparatus for communication that employs a coordinated time division multiple access (C-TDMA) mechanism to share transmission opportunities between access points (APs), allowing for coordinated transmission and improved channel utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If C-TDMA technology is introduced to share transmission opportunity between APs, then transmission delay is reduced, but channel access management complexity increases
Solution Approach 1:
The transmission opportunity is segmented into multiple time slots that are allocated to different APs in a coordinated manner. Each AP is assigned specific time slots within the TXOP, allowing them to transmit without interfering with each other. This segmentation resolves the contradiction by enabling multiple APs to share the channel efficiently (reducing delay) while using a structured allocation mechanism that manages complexity through predefined time slot assignments.
2Productivity
If multiple APs share transmission opportunity simultaneously, then channel utilization is improved, but interference between APs increases
Solution Approach 1:
The patent implements periodic time slot assignments where APs take turns transmitting in a coordinated sequence. Each AP transmits during its assigned time slot and remains silent during other APs' slots. This periodic action allows multiple APs to share the channel and improve utilization while preventing interference through temporal separation - each AP only transmits when it has the right to do so according to the coordinated schedule.
Data Source
AI summary
Provided is a method for communication, and communication devices. The method includes: receiving, by a third access point (AP), a first frame from a second AP, wherein the first frame is used for the second AP to share a first transmission opportunity with the third AP, and the first frame is a request-to-send (RTS) frame or a multi-users request-to-send (MU-RTS) trigger frame; and performing, by the third AP, transmission within the first transmission opportunity.