Downlink PDSCH Reception Using Subband Full-Duplex Symbols
Find Innovative SolutionsGenerate Solutions
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 low-latency communication scenarios in next-generation radio access technology (NR).
Innovation Solution
The method involves configuring time division duplex (TDD) and subband configuration information to enable full-duplex communication by allowing subband full duplex (SBFD) symbols in specific slots for transmitting and receiving a physical downlink shared channel (PDSCH), utilizing TDD configuration and subband configuration to determine optimal symbol allocation for efficient data channel transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full-duplex communication is applied in downlink symbols, then resource utilization and data transmission efficiency are improved, but self-interference from uplink transmission degrades downlink reception quality
Solution Approach 1:
The patent segments the frequency band into multiple subbands, allowing selective application of full-duplex communication in specific subbands rather than across the entire bandwidth. This segmentation enables the system to achieve resource utilization benefits in designated subbands while isolating self-interference to limited frequency regions, thereby resolving the contradiction between improved productivity and reduced harmful factors.
2Adaptability or versatility
If subband full duplex symbols are configured in TDD structure, then flexibility in resource allocation is improved, but system complexity increases due to additional configuration management
Solution Approach 1:
The patent introduces dynamic configuration mechanisms for subband full duplex symbols within the TDD structure, allowing the system to adaptively adjust resource allocation based on traffic conditions and interference levels. This dynamic approach enables flexible resource allocation while managing complexity through standardized configuration procedures and automated adjustment algorithms.
Solution Approach 2:
The patent employs parameter changes in the TDD configuration to enable subband full duplex operation, specifically by modifying symbol type indicators and frequency domain resource allocation parameters. These controlled parameter changes allow the system to transition between different operational modes (full-duplex, half-duplex, TDD) while maintaining manageable system complexity through parameter-based control rather than structural redesign.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Provided is a method of a terminal for receiving a downlink data channel in full duplex communication. The method may include: receiving TDD configuration information and subband configuration information; receiving downlink control information including resource allocation information about a PDSCH scheduled through a plurality of slots; determining at least one symbol for receiving the PDSCH in each of the plurality of slots on the basis of the downlink control information; and receiving the PDSCH on the basis of whether the at least one symbol includes an SBFD symbol configured according to the TDD configuration information and the subband configuration information.