Multi-Link Communication Doze-Awake Coordination for Power Reduction
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Solution Overview
Problem
In the EHT standard, multi-link devices that do not support simultaneous TX/RX capability experience unnecessary power consumption due to inefficient power management in multi-link operations.
Innovation Solution
A method where a multi-link device configures one station to a doze state during data reception and transmits an acknowledgment frame through another station, allowing the second station to operate in an awake state for data transmission, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multi-link device operates all stations in awake state to ensure data transmission capability, then data transmission reliability is improved, but power consumption increases
Solution Approach 1:
The multi-link device segments its operation into distinct phases: a first link operates during a first time period while a second link operates during a second time period. This temporal segmentation allows different stations to be active at different times, reducing overall power consumption while maintaining data transmission capability through coordinated switching between links.
Solution Approach 2:
The device implements periodic switching between links, where the first link is activated during a first time period and the second link is activated during a second time period. This periodic action pattern allows the device to alternate between different operational states, ensuring data transmission reliability while minimizing power consumption by keeping stations in doze state when not actively transmitting or receiving data.
2Productivity
If a multi-link device uses wide bandwidth and multiple streams to support high throughput, then data rate is improved, but device complexity increases
Solution Approach 1:
The device segments the multi-link operation into distinct time periods and links, where each link operates independently during its designated time period. This segmentation simplifies the overall complexity by allowing single-link operation at any given time, while still achieving high throughput through the coordination of multiple links across different time periods.
Solution Approach 2:
The device dynamically switches between different link configurations and operational states based on data transmission requirements. By adapting the active link and operational mode according to real-time needs, the device can achieve high data rates when necessary while reducing complexity during periods of lower demand, thus balancing productivity and device complexity.
Data Source
AI summary
According to various embodiments, a multi-link device (MLD) including a first STA and a second STA can receive a DL PPDU through a first link. The multi-link device can set the state of the second STA to be a doze state during the duration of the DL PPDU. The multi-link device can transmit an ACK frame through the first link in response to the DL PPDU. The multilink device can set the state of the second STA to be an awake state during the duration of the ACK frame.