Wireless Device Full Duplex Mode Selection
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Solution Overview
Problem
Current wireless communication systems face limitations in spectral efficiency due to self-interference in full-duplex operations, where simultaneous transmission and reception in the same frequency band degrade signal quality, and existing techniques for mitigating this interference are not always effective, especially in environments with low scattering and Line of Sight conditions.
Innovation Solution
The system allows wireless devices to selectively switch between full duplex and half duplex operating modes based on channel conditions, using multiple antenna arrays and signal processing techniques to determine the optimal mode and transmission rank, and communicates this selection to the network entity for scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full duplex operation is used to improve spectral efficiency, then throughput is improved, but self-interference degrades signal quality
Solution Approach 1:
The system dynamically switches between full duplex and half duplex operating modes based on channel conditions. The wireless device determines whether to operate in full duplex or half duplex mode by evaluating channel conditions, and this operating mode can be changed adaptively to optimize performance while managing self-interference
Solution Approach 2:
The system changes the operating parameter (duplex mode) based on channel conditions. By monitoring channel state information and adjusting the duplex mode accordingly, the system can achieve high throughput when conditions permit while avoiding severe self-interference degradation when conditions are poor
2Productivity
If full duplex operation is used to improve spectral efficiency, then spectral efficiency is improved, but signal quality deteriorates due to self-interference
Solution Approach 1:
The system dynamically adjusts the duplex mode based on real-time channel conditions. When channel conditions are favorable, full duplex mode is selected to maximize spectral efficiency. When conditions deteriorate, the system switches to half duplex mode to maintain acceptable signal quality, thus dynamically balancing spectral efficiency and reliability
Solution Approach 2:
The wireless device determines the preferred operating mode based on channel conditions and communicates this selection to the network entity. This feedback mechanism allows the system to adapt to changing conditions and maintain optimal signal quality while maximizing spectral efficiency when possible
3Reliability
If adaptive mode selection is implemented to manage self-interference, then signal quality is maintained, but device complexity increases
Solution Approach 1:
The wireless device is designed with multi-functionality, capable of operating in both full duplex and half duplex modes. This universal design allows the device to adapt to different channel conditions and maintain signal quality without requiring separate hardware systems for each mode, thus managing complexity while preserving reliability
Data Source
AI summary
A system of operating a wireless device in a wireless communication network includes selecting, by the wireless device, a preferred operating mode for use by the wireless device, the selection being made from at least a full duplex operating mode in which the wireless device can transmit and receive simultaneously on the same frequency band and a non full duplex operating mode; and transmitting a signal indicating the selected preferred operating mode to a network entity.