NR Subband Full Duplex Scheduling for Downlink Interference Isolation
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Solution Overview
Problem
In a new radio (NR) system with subband full duplex (SBFD), uplink signals from one user equipment (UE) interfere with downlink signals received by another UE, degrading downlink performance and increasing implementation complexity and costs.
Innovation Solution
A communication method where UEs report capability information, including radio frequency indicators, filter information, and scheduling details to the network, enabling the network to configure frequency domain resources for improved downlink reception, reducing interference and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If subband full duplex mode is used to enable simultaneous uplink and downlink transmission, then spectrum utilization is improved, but downlink receiving performance deteriorates due to uplink interference
Solution Approach 1:
The patent segments the frequency domain into multiple subbands, allowing different subbands to be allocated for uplink and downlink transmissions. By dividing the spectrum into non-overlapping subbands, the system achieves full duplex operation while isolating uplink and downlink signals in frequency domain, thus resolving the interference issue and maintaining downlink receiving performance.
Solution Approach 2:
The patent applies local quality by configuring UE-specific frequency domain resources and parameters tailored to each UE's capabilities and interference conditions. Different UEs receive customized subband allocations, filter configurations, and capability indicators that match their specific reception requirements, thereby optimizing downlink performance for each user while maintaining overall system productivity.
2Reliability
If comprehensive capability information is collected from UEs to optimize downlink reception, then downlink receiving performance is improved, but device complexity and implementation costs increase
Solution Approach 1:
The patent implements preliminary action by having UEs pre-report their capability information (such as filter support, frequency selectivity characteristics, and subband reception capabilities) before actual downlink transmission. The network device uses this advance information to pre-configure optimal frequency domain resources, subband allocations, and transmission parameters, thereby achieving optimized downlink performance without requiring complex real-time processing at the UE side.
Solution Approach 2:
The patent applies self-service by enabling UEs to autonomously determine and report their own capability indicators and preferred frequency domain configurations. Each UE independently assesses its reception capabilities and interference susceptibility, then communicates this information to the network for automated resource configuration, reducing the need for complex network-side analysis and simplifying overall system implementation.
Data Source
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AI summary
This application provides a communication method and a related communication apparatus. In the communication method in this application, in a flexible duplex mode, a terminal device reports, to a network device, information about a communication capability supported by the terminal device, and the network device configures and schedules a corresponding frequency domain resource based on the information about the communication capability, so that the frequency domain resource helps the terminal device receive a downlink signal, thereby improving downlink receiving performance of the terminal device, and avoiding increased design complexity and costs of the terminal device.