Full-Duplex Base Station Device Pairing for Interference Reduction
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Solution Overview
Problem
Current cellular devices are primarily half-duplex capable, limiting their ability to utilize full-duplex communication capabilities of base stations, resulting in wasted bandwidth due to inefficient data transmission and reception in single frequency channels.
Innovation Solution
A system and method that pairs half-duplex cellular devices to minimize interference by analyzing tone power levels and additional data, allowing for efficient full-duplex communication by scheduling data transmission and reception in a single frequency channel, utilizing a central controller or base station to coordinate device pairing and interference reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If half-duplex devices communicate in single frequency channels, then device compatibility is maintained, but bandwidth utilization is wasted
Solution Approach 1:
The base station acts as an intermediary that coordinates full-duplex communications between half-duplex devices. It schedules transmit and receive slots, manages interference through tone power level analysis, and pairs devices optimally, enabling bandwidth-efficient full-duplex operation without requiring device modifications
Solution Approach 2:
The system changes the operational parameters of half-duplex devices dynamically by assigning them different time slots and frequency tones based on interference analysis. Devices switch between transmit and receive modes according to base station scheduling, transforming static half-duplex operation into dynamic full-duplex communication
2Loss of energy
If full-duplex communication is implemented with half-duplex devices, then bandwidth efficiency is improved, but interference between devices increases
Solution Approach 1:
The base station performs preliminary interference analysis by receiving and analyzing tones from each device before establishing full-duplex pairs. This advance assessment of power levels and potential interference allows the system to pre-configured device pairs and schedules that minimize harmful interactions
Solution Approach 2:
The system uses feedback from tone power level measurements to continuously optimize device pairing and scheduling decisions. The base station monitors interference conditions and adjusts pairings accordingly, creating a closed-loop control system that maintains low interference while maximizing bandwidth utilization
3Reliability
If device pairing is performed to minimize interference, then communication reliability is improved, but system complexity increases
Solution Approach 1:
The patent extracts the complexity of interference management and device pairing from the individual devices and centralizes it in the base station. Devices simply transmit tones and follow scheduling instructions, while the base station performs the complex analysis and coordination, reducing device complexity while maintaining high reliability
Data Source
AI summary
Systems, methods, and computer-readable storage media for scheduling full-duplex communications between half-duplex mobile devices and a full-duplex capable access point. The system receives, within a time window, tones from a plurality of mobile devices, the tones indicating that each device in the plurality of devices are performing one of uploading data and downloading data. The system pairs the plurality of devices into pairs of an uploading device and a downloading device, where the pairing is based on an interference each device in the plurality of devices causes with remaining devices in the plurality of devices, to yield a list of paired devices. Upon communicating the list of paired devices to the plurality of devices, one device of each pair transmits data to the base station in a frequency channel while the other device receives data from the base station in the same frequency.