Multi-band Wireless STA Full Duplex Transmission
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Solution Overview
Problem
Current wireless stations (STAs) operate in half-duplex mode, limiting simultaneous data transmission between two communicating STAs, which restricts transmission efficiency, data rate, and throughput in WLAN communication.
Innovation Solution
Implementing multiple transceivers and channels in a single STA to enable full-duplex communication, allowing simultaneous data transmission and reception across multiple WLAN bands, with a cooperative management unit to manage channel access and frame ordering to prevent out-of-order delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If half-duplex operation is used in current wireless stations, then channel access control is simple, but transmission efficiency and data rate are limited
Solution Approach 1:
The patent segments the wireless station into multiple independent transceivers, each capable of operating on different channels simultaneously. This segmentation enables full-duplex operation where transmission and reception occur concurrently, directly resolving the contradiction by improving transmission efficiency while managing complexity through modular transceiver design
Solution Approach 2:
The patent introduces a spatial dimension by utilizing multiple channels across different frequency bands (2.4 GHz and 5 GHz). This dimensional expansion allows simultaneous transmission and reception operations that were mutually exclusive in traditional half-duplex systems, thereby enhancing productivity without proportionally increasing control complexity
2Productivity
If multiple transceivers and channels are implemented in a single STA, then full-duplex communication is enabled, but device complexity increases
Solution Approach 1:
The patent implements multi-functionality by designing transceivers that can operate across multiple frequency bands (2.4 GHz and 5 GHz) and support both transmission and reception functions. This universal design enables full-duplex communication and higher data rates while managing device complexity through standardized, versatile transceiver modules rather than specialized components for each function
3Productivity
If frames are transmitted simultaneously in multiple bands, then transmission throughput is improved, but frame ordering and sequence correctness become difficult to maintain
Solution Approach 1:
The patent implements feedback mechanisms where the cooperative management unit receives acknowledgment information from receive stations about frame reception status and ordering. This feedback enables the transmit station to adjust transmission sequences and ensure correct frame delivery ordering even when multiple frames are transmitted simultaneously across different bands, thus maintaining reliability while achieving high throughput
Data Source
AI summary
System and method of cooperative multi-band wireless STA communication that enables full duplex operations are disclosed herein. Frames are configured to carry band information and are selected to be transmitted simultaneously in multiple bands based on various constraints to avoid out-of-order delivery. For frames under a block ACK agreement, a transmit STA can specify the transmission bands for the frames in an ADDBA request frame. While a first band is transmitting a first frame under a block ACK agreement, the second band can be used to transmit a frame under the same block ACK agreement as, and from the same traffic flow with, the first frame. Otherwise, the second band can be used to transmit a frame with a different TID than the first frame.