WiFi Transmit Power Reporting for Multi-STA TPC Adjustment
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Solution Overview
Problem
Current transmit power control (TPC) schemes in WiFi 5G band fail to timely report TPC information when the link between an AP and an STA changes, and are inefficient in acquiring TPC information from multiple STAs simultaneously.
Innovation Solution
Implementing a transmit power adjusting method that includes sending a target frame with a TPC report control field to indicate a first transmit power, receiving an MPDU with a second transmit power based on the first, and using trigger frames to request and report TPC information from multiple STAs, thereby enabling adaptive power adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the current TPC scheme is used, then the STA can report TPC information, but the reporting is not timely when the link between AP and STA changes
Solution Approach 1:
The patent applies preliminary action by having the STA send TPC information in advance during normal communication, rather than waiting for link changes to trigger reporting. The TPC report is included in uplink frames sent by the STA to the AP, ensuring the information is available before needed for power adjustment decisions.
2Productivity
If the current TPC scheme is used, then the AP can request TPC information from one STA at a time, but the acquisition efficiency is very low
Solution Approach 1:
The patent merges the TPC information acquisition process with the existing uplink frame transmission mechanism. By including the TPC report control field in the uplink frame that the STA sends anyway for data transmission, the patent combines two functions (data transmission and TPC reporting) into a single process, eliminating the need for separate TPC information acquisition steps.
Solution Approach 2:
The uplink frame serves multiple functions: it carries both the data payload and the TPC report control field. This multi-functionality allows the same frame to fulfill both data communication and power control information transmission roles, improving efficiency by avoiding dedicated TPC request-response cycles.
3Productivity
If the AP requests TPC information from multiple STAs simultaneously, then the acquisition efficiency improves, but the complexity of managing multiple STAs increases
Solution Approach 1:
Each STA autonomously includes its own TPC report control field in its uplink frames without requiring individual requests from the AP. This self-service approach allows multiple STAs to report their TPC information simultaneously and independently, improving efficiency while keeping the management complexity localized to each individual STA rather than requiring centralized coordination.
Data Source
AI summary
The present disclosure provides a transmit power adjusting method, including: sending, in response to a successful contention for a channel, a target frame including a transmit power control (TPC) report control field, wherein the target frame is any one of QoS Data frame, QoS Null frame and management frame, and the TPC report control field indicates a first transmit power for transmitting the target frame; and receiving a MAC layer protocol data unit (MPDU), wherein a second transmit power for transmitting the MPDU is at least partially based on the first transmit power.