MIMO Transmit Power Control Signaling in DMG Networks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current IEEE 802.11ay draft lacks the necessary signaling to support transmit power control (TPC) for multiple input, multiple output (MIMO) transmissions, specifically in directional multi-gigabit (DMG) networks, which are essential for reducing interference and improving system performance.
Innovation Solution
The introduction of new signaling mechanisms, including a DMG Link Measurement Request element, a modified DMG Link Margin element with MIMO TPC fields, and a MIMO TPC Link Adaptation Acknowledgement field, to facilitate the request, response, and acknowledgment of TPC operations for each space-time stream in MIMO transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If new signaling mechanisms are introduced to support TPC for MIMO transmissions, then transmit power control capability is improved, but device complexity increases
Solution Approach 1:
The patent segments the TPC signaling into separate elements for different MIMO transmission types (e.g., VHT-MIMO, HE-MIMO). Each signaling element is designed to handle specific TPC scenarios, allowing the system to support multiple TPC modes without requiring a completely new unified signaling framework. This segmentation enables incremental implementation and reduces overall system complexity.
Solution Approach 2:
The patent embeds TPC signaling elements within existing wireless communication frame structures. The TPC information is nested as sub-elements or fields within standard management and control frames, allowing TPC functionality to be integrated into the existing protocol stack without requiring separate dedicated signaling channels. This nesting approach leverages existing infrastructure to reduce implementation complexity.
2Object-affected harmful factors
If TPC signaling is added to support multiple space-time streams, then interference reduction is improved, but information overhead increases
Solution Approach 1:
The patent implements differential TPC signaling where only the changed power parameters are signaled rather than complete parameter sets. Each space-time stream's TPC information is optimized to include only necessary updates, reducing redundant information transmission. This local quality approach minimizes signaling overhead while maintaining complete TPC functionality for interference management.
Solution Approach 2:
The patent employs selective TPC reporting where TPC information is transmitted only when power changes exceed a threshold or when specific conditions are met. This partial action approach avoids transmitting unnecessary TPC updates, reducing signaling overhead while ensuring that significant power adjustments are properly communicated for interference control.
3Use of energy by moving object
If per-stream TPC control is implemented, then power usage optimization is improved, but processing complexity increases
Solution Approach 1:
The patent pre-configures TPC parameters and power tables for different MIMO transmission scenarios. These pre-computed parameters are stored and readily available for quick selection during transmission, eliminating the need for complex real-time calculations. This preliminary action reduces processing complexity while enabling fine-grained per-stream power control for optimal energy efficiency.
Solution Approach 2:
The patent implements autonomous TPC decision-making at the transmitting device where local measurements and pre-configured rules automatically determine power adjustments for each space-time stream. This self-service approach eliminates the need for complex centralized control and real-time coordination, reducing processing complexity while achieving optimized power distribution across multiple streams.
Data Source
AI summary
This disclosure describes systems, methods, and devices related to transmit power control (TPC). A device may identify a link measurement request frame from a first station device. The device may determine, for each transmit chain of the first station device, a TPC action to be performed by the first device. The device may cause to send a link measurement report frame comprising a value indicative of the TPC action for each transmit chain. The device may identify an acknowledgement from the first station device.