Coordinated R-TWT Timing Synchronization for OBSS Interference
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Solution Overview
Problem
Existing wireless communication systems struggle to coordinate service periods (SPs) among overlapping basic service sets (OBSSs), leading to increased latency and interference in latency-sensitive traffic.
Innovation Solution
The implementation of a method where a wireless communication device receives timing information indicating a scheduled SP associated with an OBSS, and transmits coordinated timing information to associated STAs, ensuring orthogonal communication schedules to prevent interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If service periods are coordinated among overlapping basic service sets, then latency for latency-sensitive traffic is improved, but device complexity increases due to timing synchronization requirements
Solution Approach 1:
The patent introduces a timing synchronization mechanism that acts as an intermediary between different basic service sets. The access point receives timing information from OBSS and translates it into local timing context, serving as a mediator that enables coordination without requiring direct complex interactions between all devices in overlapping networks.
Solution Approach 2:
The access point performs preliminary actions by receiving and processing timing information about OBSS service periods in advance. This allows the system to pre-calculate orthogonal schedules and prepare timing adjustments before actual data transmission occurs, reducing real-time computational complexity.
2Object-affected harmful factors
If timing information is transmitted to STAs to coordinate service periods, then interference between concurrent transmissions is reduced, but information transmission overhead increases
Solution Approach 1:
The timing information transmission serves multiple functions: it coordinates service periods, enables interference avoidance, and maintains synchronization across OBSS. By making this single information exchange multi-functional, the patent reduces the need for separate coordination protocols and minimizes overall information overhead.
Solution Approach 2:
The patent merges timing coordination information with existing beacon frame structures or management frames that STAs already receive regularly. This consolidation allows the system to convey OBSS timing information without requiring separate dedicated communication channels, thereby reducing additional information overhead.
Data Source
AI summary
This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for coordinated scheduling of service periods (SPs). In some aspects, an access point (AP) may receive timing information indicating an SP associated with an overlapping basic service set (OBSS) and may transmit, to its associated STAs, coordinated timing information indicating the timing of the SP in relation to its timing synchronization function (TSF) timer. In some aspects, the AP may adjust the timing information to account for an offset between its TSF timer and a TSF timer associated with the OBSS. In some other aspects, the AP may synchronize its TSF timer with the TSF timer associated with the OBSS. The AP may further communicate with the STAs based on the coordinated timing information. For example, the AP may schedule communications with the STAs to be orthogonal to communications in the OBSS during the SP.