Full-Duplex Tethered Device Cooperative Communication
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Solution Overview
Problem
Conventional wireless communication techniques experience limitations in data rates, data capacity, and spectral efficiency, leading to higher latency in full-duplex communications between tethered devices and base stations in 5G networks.
Innovation Solution
Implementing a method for full-duplex cooperative communication using tethered devices, where one device operates as a transmitter and the other as a receiver, allowing simultaneous data transmission and reception, with the ability to switch between different communication modes based on link quality and interference levels, and utilizing modems to process and manage data at various layers for interference cancellation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional wireless communication techniques are used, then device complexity is maintained at acceptable levels, but data rates and spectral efficiency are limited
Solution Approach 1:
The system segments communication functions between two tethered devices, where one device performs transmission while the other performs reception. This functional segmentation enables full-duplex operation and improves data rates by allowing simultaneous uplink and downlink communications without requiring each individual device to handle both functions independently.
Solution Approach 2:
The patent combines the communication capabilities of two tethered devices to create a unified full-duplex communication system. By merging the transmit and receive functions across two devices connected via tether, the system achieves higher spectral efficiency and data rates that exceed what a single device could accomplish alone.
2Productivity
If full-duplex communication is implemented using tethered devices, then spectral efficiency is improved, but self-interference and interference management become significant challenges
Solution Approach 1:
The tether connection acts as an intermediary that physically separates the transmit and receive paths between the two devices. This intermediary connection allows the system to achieve full-duplex operation while managing self-interference, as the tether provides a controlled transmission medium that can be optimized to minimize interference effects.
Solution Approach 2:
The system extracts the interference problem from the wireless medium by using the tether as a separate, controlled transmission path. By taking out the receive function to a different device connected via tether, the system isolates the self-interference issue and can apply targeted interference cancellation techniques at the receiving device.
3Loss of time
If simultaneous data transmission and reception are enabled, then latency is reduced, but interference cancellation processing complexity increases
Solution Approach 1:
The system performs preliminary interference cancellation processing by having the transmitting device prepare and send interference characterization information to the receiving device via the tether. This preliminary action allows the receiver to pre-compensate for self-interference effects, reducing latency while managing processing complexity through distributed processing architecture.
Data Source
AI summary
Wireless communications systems and methods related to full-duplex cooperative communication by a first device tethered with a second device communicating with a third device. With the tether, one device between the first device and the second device is designated or selected as a transmitter, and the other device as a receiver. In full-duplex operation, the transmitter may transmit outgoing data concurrent to the receiver receiving incoming data. In an example, one of the first and second devices may have a modem that is used to control the full-duplex communication. The modem controls both transmission and reception. In another example, both devices may have a modem. Each modem may assume responsibility for part of the full-duplex communication by performing some processing before either shipping received data, or transmitting outgoing data. The amount of processing may be split at a link layer. Interference cancellation may mitigate interference from full-duplex operation.