EDMG Link Measurement Frames for mmWave TDD Rate Adaptation
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Solution Overview
Problem
Wireless networks operating in millimeter wave frequencies face challenges such as increased bandwidth demand and capacity issues, particularly in scenarios with a high number of devices, where existing base stations struggle to meet service demands.
Innovation Solution
The implementation of enhanced directional multi-gigabit (EDMG) communication techniques, including the use of EDMG stations and access points that employ advanced communication protocols like OFDM and OFDMA, and the transmission of Link Measurement Response Frames with a DMG Link Margin element for TDD rate adaptation, to optimize network performance and capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If base stations operate in millimeter wave frequencies to meet increased bandwidth demand, then network capacity and throughput are improved, but network complexity and difficulty of detecting and measuring increase
Solution Approach 1:
The patent implements a feedback mechanism where the EDMG station measures link quality metrics (signal strength, interference levels) and reports them to the AP via management frames. The AP uses this feedback to dynamically adjust transmission parameters including mmWave frequency selection, OFDM subcarrier spacing, and power levels, thereby resolving the measurement difficulty while maintaining high network capacity
Solution Approach 2:
The system dynamically adapts transmission parameters based on real-time channel conditions. The AP and station continuously adjust mmWave beamforming vectors, modulation and coding schemes, and resource allocation in response to changing link quality, enabling the network to maintain high capacity despite the complexity of mmWave propagation characteristics
2Quantity of substance
If the number of devices demanding service increases, then network bandwidth demand increases, but base station ability to meet demands decreases
Solution Approach 1:
The patent segments the network into multiple EDMG associations, each managed by a separate AP or virtual AP. This segmentation allows the system to handle multiple devices simultaneously by distributing them across different associations, preventing any single base station from becoming overwhelmed and thereby maintaining service reliability as device quantity increases
Solution Approach 2:
The AP is designed with multi-functionality to simultaneously perform traditional Wi-Fi operations and EDMG millimeter wave communications. It can handle both legacy devices and EDMG devices, manage multiple associations, and dynamically allocate resources across different frequency bands and modulation schemes, enabling the system to meet increasing bandwidth demand from multiple devices while maintaining reliable service
3Productivity
If EDMG communication techniques are implemented to optimize network performance, then network capacity and coverage are improved, but device complexity increases
Solution Approach 1:
The patent introduces management frames as an intermediary mechanism that simplifies EDMG communication. These standardized frames carry pre-defined fields for link quality reporting, resource allocation requests, and beam management, abstracting the complexity of millimeter wave operations from individual devices and enabling optimized network performance through structured information exchange
Data Source
AI summary
Embodiments of an enhanced directional multi-gigabit (EDMG) station (STA), access point (AP), and method of communication are generally described herein. The EDMG STA may receive, from the AP, a Link Measurement Request Frame that includes a request for information for time division duplexing (TDD) rate adaptation. The EDMG STA may transmit a Link Measurement Response Frame that includes a Directional Multi Gigabit (DMG) Link Margin element that includes a Rate Adaption Control parameter. The DMG Link Margin element may be configurable to include one or more optional fields for the TDD rate adaptation and transmit power control. The Rate Adaptation Control parameter may indicate: a number of space time streams (STSs) for which information is included in the DMG Link Margin element; and whether the DMG Link Margin element includes the one or more optional fields.