Wireless Communication Node Timing for PCI-Based Signal Coordination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In the context of new radio (NR) systems, the static division of spectrum resources into frequency division duplex (FDD) and time division duplex (TDD) leads to reduced resource utilization and increased delays due to half-duplex modes, while flexible duplex modes like subband non-overlapping full duplex (SBFD) face interference issues, particularly with synchronization signals in time domain resources.
Innovation Solution
A method for determining time domain resources and reference signals, including synchronization signals, to ensure orthogonal overlap or flexible selection based on physical cell identifiers (PCIs), allowing nodes to preferentially receive or transmit signals, thereby enhancing flexibility and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If half-duplex mode is used in TDD spectrum, then self-interference is avoided and cross link interference is relieved, but resource utilization decreases and delay increases
Solution Approach 1:
The patent applies dynamics by transitioning from static half-duplex mode to dynamic flexible duplex mode. The gNB can dynamically switch between half-duplex and full-duplex modes based on real-time channel conditions and interference levels. This allows the system to adaptively optimize between self-interference avoidance and resource utilization, resolving the contradiction between reliability and productivity.
Solution Approach 2:
The patent changes the operational parameters of the TDD system by introducing flexible duplex mode that allows simultaneous uplink and downlink transmissions in different subbands. This parameter change enables full-duplex operation in specific frequency subbands while maintaining half-duplex in others, thereby improving resource utilization without completely sacrificing self-interference avoidance.
2Productivity
If flexible duplex mode or full duplex mode is supported, then resource utilization improves, but interference problems occur including self-interference and cross link interference
Solution Approach 1:
The patent segments the frequency spectrum into different subbands with distinct transmission directions. By dividing the total bandwidth into multiple subbands, the system can simultaneously perform uplink transmissions in some subbands and downlink transmissions in others, enabling flexible duplex operation while managing interference through frequency-domain separation.
Solution Approach 2:
The patent introduces an intermediary approach by using gNB-powered interference cancellation techniques. The gNB acts as an intermediary that actively cancels out self-interference and cross-link interference through advanced signal processing, allowing full-duplex mode to operate with reduced harmful interference effects.
3Adaptability or versatility
If subband non-overlapping full duplex mode is used, then communication flexibility improves, but interference situation becomes more complex
Solution Approach 1:
The patent applies dynamics by implementing flexible duplex mode where the gNB can dynamically adjust transmission configurations based on real-time channel conditions. The system adapts its operation between half-duplex and full-duplex modes, and between different subband configurations, thereby maintaining high communication flexibility while managing interference complexity through adaptive control.
Solution Approach 2:
The patent utilizes parameter changes by allowing dynamic modification of duplex mode parameters including subband allocation, transmission direction, and power levels. This flexibility in parameter adjustment enables the system to optimize performance under varying conditions while managing interference through coordinated parameter changes across multiple subbands.
4Device complexity
If unified design solution is applied for different scenarios, then hardware complexity and costs are reduced, but scenario-specific optimization may be compromised
Solution Approach 1:
The patent applies universality by designing a unified flexible duplex system that can handle multiple scenarios (half-duplex mode, full-duplex mode, subband non-overlapping full duplex mode) using the same basic hardware architecture. The gNB and UE employ universal interference cancellation capabilities and flexible resource allocation algorithms that adapt to different operational modes, thereby reducing hardware complexity while maintaining reliable performance across various scenarios.
Data Source
Figure 1~3
Figure 4~5
Figure 6~9
AI summary
The present application discloses a method and device for a node used for wireless communication. A first node receives a first information block, the first information block being used for determining a first time domain resource, and the first time domain resource comprising at least one symbol; and a first processor receives a first signal or sends a first signal, wherein a first reference signal is used for determining a spatial relationship of the first signal, and the first reference signal is used for determining a first PCI; the first reference signal comprises a synchronization signal; and whether the first time domain resource and the first reference signal overlap in the time domain is related to the first PCI. The method improves the flexibility of base station configuration and facilities the improvement of system performance, and according to requirements, the first node can flexibly select to first receive a synchronization signal of an additional cell or send an uplink physical layer signal.