Wireless Communication Node BWP Configuration for SBFD
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing NR system's half-duplex mode in TDD spectrum leads to reduced resource utilization and increased latency, while flexible duplex modes like SBFD introduce significant interference, and the combination of SBFD with additional PCIs complicates resource configuration, necessitating a redesign of BWP and SBFD configurations.
Innovation Solution
A method for wireless communication that involves configuring two independent frequency and time domain resources for distinct identities, such as PCIs, within a BWP to ensure flexibility and mobility management, with shared or separate resource sets for uplink transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If half-duplex mode is used in TDD spectrum, then self-interference and cross-link interference are avoided, but resource utilization rate decreases and latency increases
Solution Approach 1:
The patent implements dynamic TDD configuration where uplink-downlink slot patterns can be flexibly adjusted based on traffic conditions. The base station can dynamically switch between different TDD configurations (e.g., Config 0-6) to optimize resource utilization while managing interference, allowing the system to transition from static half-duplex to adaptive duplexing modes.
Solution Approach 2:
The system changes key parameters including slot format indicators (SFI), uplink-downlink configuration patterns, and resource allocation parameters dynamically. By modifying these parameters based on real-time conditions, the system achieves higher resource utilization while maintaining interference management capabilities.
2Productivity
If flexible duplex mode (SBFD) is supported, then resource utilization improves, but self-interference and cross-link interference increase significantly
Solution Approach 1:
The patent segments the spectrum into different functional regions including uplink subbands, downlink subbands, and guard subbands. By dividing the frequency spectrum into distinct segments with specific purposes, the system enables flexible duplex operation while isolating interference through guard subbands and frequency separation between uplink and downlink transmissions.
Solution Approach 2:
The patent introduces guard subbands as intermediary frequency regions between uplink and downlink subbands. These guard subbands act as buffers that absorb and isolate interference, allowing the system to operate in flexible duplex mode while protecting against self-interference and cross-link interference through the intermediary guard regions.
3Adaptability or versatility
If additional PCIs are introduced for flexible configuration, then scheduling flexibility improves, but configuration complexity increases
Solution Approach 1:
The patent uses a universal additional PCI configuration mechanism that serves multiple functions: identifying secondary cells, distinguishing SBFD configurations, and managing multiple TDD patterns. This single additional PCI system provides multi-functional support for various flexible configuration scenarios, reducing the need for separate configuration mechanisms for each function.
Solution Approach 2:
The system performs preliminary configuration of additional PCIs and TDD patterns through higher-layer signaling (RRC configuration) before actual data transmission. By pre-configuring the flexibility parameters and additional identities, the system reduces real-time configuration complexity while maintaining adaptability during operation.
4Device complexity
If existing BWP configuration is used with SBFD, then implementation is simpler, but resource allocation flexibility is insufficient
Solution Approach 1:
The patent implements nested configuration where SBFD-specific parameters and additional PCI configurations are embedded within the existing BWP framework. The BWP configuration contains nested elements for TDD patterns, slot formats, and additional identities, allowing the system to maintain the familiar BWP structure while incorporating flexible SBFD capabilities through nested configuration layers.
Data Source
Figure 1~3
Figure 4~6
Figure 7~10
AI summary
The present application discloses a method and device for a node used for wireless communication. A node first receives a target information set, the target information set being used for determining a first frequency domain resource set and a second frequency domain resource set; and then a first signal is sent in a first time-frequency resource set. The first frequency domain resource set and the second frequency domain resource set both belong to a first BWP; first serving cell configuration information is used for determining the first BWP, and the first serving cell configuration information is used for indicating a first identity and a second identity; the first identity and the second identity are respectively associated with the first frequency domain resource set and the second frequency domain resource set; the first serving cell configuration information is used for determining a first time domain resource set, and the first time domain resource set is associated with the first identity and the second identity. According to the present application, a resource configuration mode of subband non-overlapping full duplex is improved, so as to improve system performance.