Buffer Status Report for Urgent TID in WLAN Data Frames
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless local area networks (WLANs), there is a delay in reporting buffer status of urgent traffic identifiers (TIDs) from a station (STA) to an access point (AP), which can lead to inefficiencies in resource allocation and increased latency due to the need for STAs to wait or contend for the wireless medium to inform the AP of urgent TIDs, even when resources are already allocated for other TIDs.
Innovation Solution
The solution involves providing a buffer status report for urgent TIDs in the High Efficiency (HE) Control field of a data frame carrying data for a current TID, allowing the STA to report the status of other TIDs, including urgent ones, within the MAC frame header, thereby reducing delay and enabling timely resource allocation by the AP.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a STA waits to contend for the wireless medium to report buffer status of urgent TIDs, then the reporting mechanism follows standard protocol procedures, but the delay in reporting increases and resource allocation efficiency deteriorates
Solution Approach 1:
The patent combines the buffer status report for urgent TIDs with the existing data frame transmission by embedding the buffer status information in the HE Control field of the same frame that carries data for the current TID. This merging eliminates the need for separate contention and transmission operations, thereby reducing delay while maintaining reporting reliability
Solution Approach 2:
The patent enables preliminary reporting of buffer status for urgent TIDs by including this information in advance within the data frame being transmitted. The AP receives the buffer status information before needing to allocate resources, allowing proactive scheduling rather than reactive response to contention-based reports
2Loss of information
If a STA uses separate frame transmissions to report urgent TID buffer status, then the buffer status information is clearly communicated, but the number of frame transmissions increases and channel efficiency decreases
Solution Approach 1:
The patent merges multiple functions into a single frame transmission: data transmission for the current TID and buffer status reporting for urgent TIDs. The HE Control field carries both the data payload and the buffer status information, eliminating redundant transmissions and improving channel utilization while preserving complete buffer status information
Solution Approach 2:
The data frame is designed to serve multiple purposes simultaneously: it carries data for the current TID in its payload while also conveying buffer status information for urgent TIDs in the HE Control field. This multi-functionality reduces the total number of frames needed and improves overall system productivity
Data Source
AI summary
A wireless local area network (WLAN) station (STA) reports, with a medium access control (MAC) frame, a buffer status of an urgent traffic identifier (TID) to a second STA. In some embodiments, the second STA is also an access point (AP). The delay in reporting is reduced by providing a buffer status report for the urgent TID in a data frame being transmitted to carry data for a current TID. The buffer status report, in some embodiments, provides the value of the urgent TID. In some embodiments, the buffer status report provides an indication of the amount of data in a buffer corresponding to the urgent TID. In some embodiments, the buffer status report is based on an aggregated measure of more than one buffer with data awaiting transmission. The transmission of the MAC frame, in some embodiments, is unsolicited.