SBFD Bandwidth Part Configuration for Full-Duplex Subband Scheduling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently utilizing radio resources for full duplex communication, particularly in scenarios requiring high reliability and low latency, such as URLLC, due to limitations in configuring uplink and downlink subbands for simultaneous transmission and reception.
Innovation Solution
A method and apparatus for configuring a bandwidth part (BWP) in a wireless communication system to support subband full duplex (SBFD) operations by defining specific and non-specific BWPs, allowing for simultaneous downlink and uplink transmissions through separate subbands, with configurations managed through RRC signaling and DCI formats.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional TDD or FDD configurations are used, then system reliability and latency performance can be maintained, but radio resource utilization efficiency for full duplex operations deteriorates
Solution Approach 1:
The patent divides the bandwidth into multiple subbands (first subband for downlink, second subband for uplink) within the same time slot, enabling simultaneous full-duplex operations. This segmentation allows independent configuration of UL-DL directions in different frequency subbands, improving resource utilization while maintaining reliability through proper isolation.
Solution Approach 2:
The patent applies different UL-DL configuration characteristics to different subbands. Specifically, the first subband is configured for downlink with appropriate parameters, while the second subband is configured for uplink with different parameters, allowing each subband to be optimized for its specific direction while operating simultaneously.
2Productivity
If subband full duplex operations are implemented, then radio resource utilization efficiency improves, but self-interference between uplink and downlink transmissions increases
Solution Approach 1:
By segmenting the bandwidth into separate subbands for UL and DL transmissions, the patent reduces self-interference compared to full-band full duplex. The guard subband between the first and second subbands provides additional isolation, minimizing interference while allowing simultaneous operations in different frequency regions.
Solution Approach 2:
The guard subband acts as an intermediary element between the downlink first subband and uplink second subband. This guard region provides frequency isolation and reduces interference coupling between the opposing transmission directions, enabling full duplex operation with controlled interference levels.
3Adaptability or versatility
If multiple BWPs are configured for full duplex support, then adaptability and versatility improve, but device complexity and configuration management increase
Solution Approach 1:
The patent configures multiple bandwidth parts (BWPs) where each BWP can serve multiple functions. The first BWP supports both traditional TDD operations and full-duplex operations when paired with the second BWP. The second BWP similarly supports both uplink-only and full-duplex uplink functions, providing multi-functionality that reduces the need for entirely separate configuration sets.
Solution Approach 2:
The patent enables dynamic switching between different BWP configurations and activation of full-duplex operations based on traffic conditions. The network can dynamically activate or deactivate full-duplex mode by controlling BWP activation, allowing the system to adapt to varying traffic demands while managing complexity through conditional activation rather than permanent complex configuration.
Data Source
AI summary
Provided are a method and an apparatus for performing DL transmission/reception and (UL transmission/reception in a wireless communication system. A base station transmits first UL-DL configuration information for DL symbols, UL symbols, and/or flexible symbols, and second UL-DL configuration information for SBFD symbols to a terminal. The terminal, based on the received first UL-DL configuration information and/or second UL-DL configuration information, configures at least one SBFD symbol for a DL subband and a UL subband. Based on the configured at least one SBFD symbol, the terminal performs DL reception through the DL subband and/or UL transmission through the UL subband. The at least one SBFD symbol is determined as a symbol for the DL reception and/or the UL transmission by: i) applying the second UL-DL configuration information through activation of a specific BWP, or ii) applying the first UL-DL configuration information through activation of a non-specific bandwidth part.