Full Duplex Scheduling for Cellular Interference Management
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Solution Overview
Problem
Full duplex wireless communication systems face interference challenges, particularly in cellular networks, where mobile devices transmitting and receiving on the same frequency simultaneously experience significant interference, affecting spectrum efficiency and user perceived service quality, especially in high-density indoor environments.
Innovation Solution
The implementation of novel scheduling methods for full duplex cellular systems, including concurrent joint DL-UL scheduling, DL-prioritized scheduling, UL-prioritized scheduling, and FD bundle scheduling, which utilize joint scheduling metrics to optimize both uplink and downlink traffic, mitigate MD-to-MD interference by intelligently pairing mobile devices and adjusting resource allocation based on interference feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full duplex operation is implemented to double spectrum efficiency, then spectrum efficiency is improved, but interference between transmission and receiver chain increases significantly
Solution Approach 1:
The patent applies interference cancellation techniques to convert the harmful self-interference in full duplex systems into a manageable parameter. By implementing advanced signal processing to cancel the interference between transmit and receive chains, the system can achieve the desired spectrum efficiency doubling while mitigating the harmful interference effect
Solution Approach 2:
The patent introduces base station to base station interference cancellation as an intermediary mechanism. The base station acts as a mediator that cancels interference from neighboring base stations before it reaches the receiver, enabling full duplex operation in cellular networks while managing the interference problem
2Productivity
If full duplex cellular network is deployed to increase capacity, then network capacity is improved, but interference environment becomes more complicated with additional interference types
Solution Approach 1:
The patent segments the interference management problem into distinct components: base station to base station interference cancellation and user equipment to user equipment interference management. By separating these interference types and addressing them with different scheduling strategies, the system can manage the complicated interference environment while maintaining increased network capacity
Solution Approach 2:
The patent changes scheduling parameters and resource allocation strategies to adapt to the full duplex interference environment. By adjusting scheduling metrics, power control parameters, and resource block allocation based on interference conditions, the system manages the complex interference while achieving higher network capacity
3Object-affected harmful factors
If joint scheduling is implemented to mitigate MD-to-MD interference, then interference management is improved, but scheduling complexity increases
Solution Approach 1:
The patent implements preliminary pairing of downlink and uplink user equipment based on interference criteria before resource allocation. By pre-identifying compatible UE pairs that will experience minimal mutual interference and establishing pairing decisions in advance, the system reduces the complexity of real-time joint scheduling while effectively mitigating MD-to-MD interference
Data Source
AI summary
A communication device and a method for determining an information from a second device including setting an initial beamforming pattern is provided. The initial beamforming pattern includes a beamforming direction and a corresponding beamforming area for each of the plurality of antenna ports, including determining a concerned direction interval based on overlapping beamforming areas of adjacent pairs of the plurality of antenna ports, receiving a signal from the second device, measuring a signal gain from the signal on each of the plurality of antenna ports, determining which concerned direction interval the second device occupies based on an antenna port having the highest signal gain and on one of the adjacent pair of antenna ports to the antenna port having the highest signal gain having a higher signal gain, and determining the information from the second device based on the determined concerned direction interval.