TWT Resource Sharing in Overlapping BSSs
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Solution Overview
Problem
In overlapping basic service sets (OBSS) within the 802.11ah standard, time-frequency resources for target wake time (TWT) service periods can collide, leading to interference and reduced communication quality and efficiency between devices in different basic service sets (BSSs).
Innovation Solution
The method involves sharing TWT resource configuration information among multiple BSSs in an OBSS scenario, allowing devices to coordinate and avoid collisions by exchanging information such as TWT period details, channel allocation, and spatial reuse permissions, thereby optimizing data transmission resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If TWT communication is established within a single BSS, then power consumption is reduced for light-traffic devices, but resource collisions and interference occur when multiple BSSs overlap
Solution Approach 1:
The patent introduces an intermediary mechanism where BSSs exchange TWT resource configuration information through designated devices (APs or STAs). This intermediary information exchange allows overlapping BSSs to coordinate their TWT schedules and avoid resource collisions, thereby maintaining both low power consumption and high transmission reliability
Solution Approach 2:
The patent implements a feedback loop where TWT resource configuration information is shared between overlapping BSSs. Each BSS receives feedback about the other's TWT schedules and adjusts its own resource allocation accordingly, preventing collisions while preserving the energy-saving benefits of TWT
2Reliability
If TWT resource configuration is shared among multiple BSSs, then resource collisions are avoided and transmission quality improves, but system complexity increases
Solution Approach 1:
The patent segments the complexity by dividing it into individual BSS-level operations. Each BSS independently manages its own TWT resources and exchanges information with others, rather than requiring a centralized complex coordination system. This segmentation maintains reliability while limiting the complexity growth to manageable levels
Solution Approach 2:
The patent creates a universal TWT coordination mechanism that can be applied across multiple BSSs using the same protocol and information exchange format. This multi-functional approach allows the system to handle arbitrary numbers of overlapping BSSs without proportionally increasing complexity, as the same coordination principles apply universally
Data Source
AI summary
This application provides an information transmission method and a communication apparatus. The method includes: A first device sends TWT resource configuration information in a first BSS to a second device. The first device is located in the first BSS, the second device is located in a second BSS, and the first BSS and the second BSS at least partially overlap. According to the information transmission method provided in this application, TWT resource configuration information in a plurality of BSSs is shared among the plurality of BSSs in an OBSS scenario. Therefore, collision can be further avoided during data transmission in different BSSs in the OBSS scenario, thereby improving quality and assurance of data transmission between devices in the plurality of BSSs, and improving efficiency of data transmission in the OBSS scenario.