Subband Configuration for Full Duplex Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently performing downlink and uplink transmissions and receptions through subbands for full duplex communication in 5G NR systems.
Innovation Solution
The method involves receiving and transmitting subband configuration information for full duplex communication, which includes time domain resource configuration information. This information specifies reference subcarrier spacing (SCS) configuration and pattern configuration, with each pattern including period and potentially offset information, to enable efficient subband-based full duplex operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full duplex communication is implemented in 5G NR systems, then spectral efficiency and communication capacity are improved, but interference management and signal quality deteriorate due to simultaneous downlink and uplink transmissions in the same frequency band
Solution Approach 1:
The frequency band is divided into multiple subbands, with specific subbands allocated for downlink transmission and others for uplink transmission. This segmentation allows simultaneous full duplex operation while reducing interference between downlink and uplink signals by spatially separating them in the frequency domain.
Solution Approach 2:
Different quality characteristics are applied to different subbands. Downlink subbands are optimized for base station transmission with appropriate power and modulation schemes, while uplink subbands are optimized for user equipment transmission. This local optimization improves overall system performance while managing interference effectively.
2Productivity
If subband configuration information with detailed time domain resource configuration is transmitted, then resource allocation efficiency and full duplex operation precision are improved, but signaling overhead and system complexity increase
Solution Approach 1:
Time domain resources are segmented into multiple patterns, each pattern representing a specific configuration of downlink and uplink subband assignments. Instead of configuring each subband individually, the system uses a small number of patterns that can be activated based on traffic conditions, significantly reducing signaling overhead while maintaining flexible resource allocation.
Solution Approach 2:
The subband configuration follows periodic patterns where downlink and uplink subband assignments repeat at defined intervals. This periodic structure allows the system to efficiently manage full duplex resources by pre-defining alternating patterns of downlink-heavy and uplink-heavy configurations, reducing the need for frequent reconfiguration signaling.
Data Source
AI summary
Disclosed are a method and an apparatus for performing downlink transmission and reception and uplink transmission and reception in a wireless communication system. Subband configuration information for full duplex communication is transmitted from a base station to UE. The UE performs the downlink reception or the uplink transmission through a subband based on the received subband configuration information, wherein the subband configuration information includes time domain resource configuration information, the time domain resource configuration information includes reference subcarrier spacing (SCS) configuration information and at least one pattern configuration information, and each pattern configuration information of the at least one pattern configuration information includes period information.