Full-Duplex Base Station Pairing for Inter-UE Interference Control
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Solution Overview
Problem
Full-duplex communication systems face challenges with inter-UE interference, particularly in wireless systems supporting faster transmissions and increased bandwidth, such as in 5G and 6G networks, where self-interference and cross-link interference between user equipment (UE) are significant.
Innovation Solution
Implementing a full-duplex base station that selects half-duplex UE pairs and uses adaptive phase-changing devices (APDs) and blockers to manage interference by configuring phase vectors and resource assignments, ensuring inter-UE interference remains below a threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full-duplex communication is implemented to increase transmission speed and bandwidth utilization, then system productivity and spectral efficiency are improved, but inter-UE interference and signal reliability deteriorate
Solution Approach 1:
The system segments the communication resources by identifying specific resource blocks (RBs) where inter-UE interference occurs and applying targeted cancellation techniques only to those affected segments, rather than treating the entire communication channel uniformly. This allows full-duplex operation to continue in non-interfering resource blocks while mitigating interference in specific problematic blocks.
Solution Approach 2:
An interference cancellation mechanism acts as an intermediary between the interfering uplink signal and the affected downlink signal. The base station receives interference information from UEs, processes this information to identify interfering resource blocks, and applies cancellation techniques to remove the harmful interference while preserving the desired signal components.
2Adaptability or versatility
If full-duplex base station transmits and receives simultaneously on the same frequency to improve spectral efficiency, then bandwidth utilization is improved, but inter-UE interference increases
Solution Approach 1:
The system implements a feedback mechanism where user equipment reports received interference levels and resource block quality to the base station. The base station uses this feedback information to identify which resource blocks are experiencing inter-UE interference and applies interference cancellation techniques selectively to those blocks, maintaining full-duplex operation in clean resource blocks.
Solution Approach 2:
The base station dynamically changes communication parameters by identifying specific resource blocks affected by interference and applying different processing techniques to different RBs. Some resource blocks undergo interference cancellation while others maintain standard full-duplex operation, allowing the system to adapt to varying interference conditions across the frequency spectrum.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively reduces inter-UE interference by optimizing communication timing and signal reflection, enhancing signal quality and reliability in full-duplex communication systems.
Implementation Method 1
uses adaptive phase-changing devices (APDs) and blockers to manage interference by configuring phase vectors
Implementation Method 2
enhancing signal quality and reliability in full-duplex communication systems through signal reflection
Data Source
AI summary
A method for reducing inter-user equipment (UE) interference in a communication system that includes a full-duplex base station. A method performed by the full-duplex base station includes selecting a first UE and a second UE as a half-duplex pair, the first UE and the second UE generating an inter-UE interference that achieves a threshold criterion. The method then includes receiving a first uplink signal on a specific frequency from the first UE and transmitting a first downlink signal on the specific frequency to the second UE, with the first uplink signal and the first downlink signal at least partially overlapping in time.