Power-Saving MU Transmission With Variable Data Unit Lengths
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing multi-user (MU) communication, particularly in reducing power consumption and latency while accommodating varying data transmission lengths from multiple stations.
Innovation Solution
Implementing a frame structure that allows stations to transmit data units with lengths determined by their own data availability, enabling early termination of data units, and using acknowledgement frames to manage power consumption and reduce unnecessary transmission duration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a common length is specified for all data units in MU transmission, then the frame structure is simplified and synchronization is improved, but power consumption increases and transmission efficiency decreases for stations with less data
Solution Approach 1:
The patent implements dynamic data unit lengths in MU transmission, where each station transmits data units with lengths adapted to their actual data availability rather than using a fixed common length. This allows stations to terminate transmission early when data is exhausted, reducing power consumption while maintaining frame structure through the use of padding fields and length indicators that preserve synchronization and protocol integrity.
2Stability of the object's composition
If data units are transmitted with fixed common length, then transmission synchronization is improved, but latency increases for stations that have completed data transmission
Solution Approach 1:
The patent segments the MU transmission frame into individual data unit portions for each station, allowing early termination of data units when a station's data is exhausted. The frame structure is divided into station-specific segments with length indicators, enabling stations to complete transmission at different times while maintaining overall frame synchronization through padding and delimiters.
3Productivity
If early termination of data units is allowed, then power consumption is reduced and latency is decreased, but frame structure complexity and protocol management increase
Solution Approach 1:
The patent incorporates feedback mechanisms through length indicators and padding fields in the frame structure that inform receiving stations of actual data unit lengths. This feedback enables protocol entities to manage early termination efficiently by knowing when each station's data is complete, reducing the need for complex error handling and retransmission protocols while maintaining transmission efficiency.
Data Source
AI summary
Certain aspects of the present disclosure provide an apparatus for wireless communications. The apparatus generally includes a processing system configured to generate a frame for triggering transmission of a plurality of data units from a plurality of wireless nodes, a first interface configured to output the frame for transmission to the plurality of wireless nodes, and a second interface configured to obtain the plurality of data units after outputting the frame for transmission, wherein the plurality of data units have different lengths.