Subband Full-Duplex Transmission for Flexible NR Resource Allocation
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently multiplexing radio resources based on different numerologies to meet the diverse requirements of enhanced mobile broadband, massive machine-type communication, and ultra-reliable and low-latency communication scenarios in next-generation radio access technology (NR).
Innovation Solution
The implementation of subband full duplex (SBFD) slots or symbols, where configuration information is used to enable simultaneous uplink and downlink transmission/reception by user equipment (UE) and base stations, allowing flexible resource allocation through subband configuration for full-duplex communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible frame structures are designed to meet diverse usage scenario requirements, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent segments the frequency band into multiple subbands, with specific subbands configured for full-duplex operation. This segmentation allows different numerologies and transmission modes to be applied to different subbands, providing flexibility for diverse usage scenarios while maintaining manageable system complexity through structured division of resources
Solution Approach 2:
The patent introduces dynamic slot and symbol configurations within subbands, allowing the network to flexibly assign uplink, downlink, and flexible symbols based on traffic requirements. This dynamic resource allocation enables adaptation to varying usage scenarios (eMBB, mMTC, URLLC) while maintaining systematic control over resource management
2Productivity
If full-duplex communication is implemented in subbands, then resource utilization efficiency is improved, but signal interference increases
Solution Approach 1:
The patent applies full-duplex communication selectively to specific subbands rather than across the entire frequency band. By configuring certain subbands for full-duplex operation while maintaining traditional half-duplex modes in other subbands, the system achieves improved resource utilization in designated areas while isolating interference effects to localized regions that can be managed through frequency separation
Solution Approach 2:
The patent introduces guard bands between full-duplex subbands and other subbands, acting as intermediaries that isolate and filter interference signals. These guard bands serve as buffer zones that prevent self-interference from full-duplex transmissions from affecting other frequency resources, thereby managing the harmful effects while preserving full-duplex benefits
Data Source
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AI summary
Provided is a method for performing, by a terminal, uplink transmission or downlink reception in full-duplex communication. The method may include receiving configuration information about a downlink slot and a downlink symbol and an uplink slot and an uplink symbol receiving configuration information about a subband for full-duplex communication, and configuration information about an SBFD slot or an SBFD symbol and performing, on the basis of transmission direction link configuration information in the SBFD slot or SBFD symbol, uplink transmission or downlink reception.