Dynamic Duplex Direction Switching for Wireless Control Signaling
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Solution Overview
Problem
Current wireless communication networks face limitations in spectral efficiency and flexibility due to fixed duplex directions in time-frequency resources, leading to inefficient control signaling and resource wastage, especially in half-duplex systems where nodes cannot transmit and receive simultaneously on the same frequency band.
Innovation Solution
A method where a communication node determines the direction of communication for time-frequency resources to be switched dynamically, allowing for flexible duplex operations, enabling efficient exchange of control signaling with multiple nodes within a frame while minimizing signaling among nodes, by reserving specific resources for reference signals and control information and switching their direction as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed duplex directions are used in time-frequency resources, then resource allocation is simple and stable, but spectral efficiency and flexibility deteriorate due to inability to adapt to varying traffic conditions
Solution Approach 1:
The patent implements dynamic switching of duplex directions for control signaling resources. The system allows communication nodes to switch between transmission and reception directions in different time-frequency resources based on traffic conditions, transforming the static resource allocation into a dynamic adaptive system that improves spectral efficiency while maintaining manageable complexity through structured switching patterns
2Productivity
If control signaling is exchanged with multiple nodes simultaneously, then network throughput increases, but signaling overhead and resource conflict increase in half-duplex systems
Solution Approach 1:
The patent segments control signaling resources into multiple time-frequency resources with different duplex directions. By dividing the control signaling exchange into separate resources for different node pairs, the system enables simultaneous multi-node communication while avoiding resource conflicts and reducing signaling overhead through efficient resource partitioning
Solution Approach 2:
The patent utilizes the time-frequency domain as an additional dimension for resource allocation. By assigning different time-frequency resources to different node pairs for control signaling, the system enables parallel communication without interference, effectively adding a dimensional layer to resolve resource conflicts in half-duplex systems
3Reliability
If time-frequency resources are reserved for control information, then control signaling reliability is ensured, but resource utilization efficiency decreases due to fixed allocation
Solution Approach 1:
The patent changes the parameters of time-frequency resource allocation by dynamically adjusting duplex directions for control signaling resources. This allows the system to maintain reserved resources for control information reliability while optimizing their utilization by adapting allocation patterns to actual traffic conditions, reducing resource wastage through parameter adaptation
Data Source
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AI summary
A method for performing transmission or reception by a first communication node (511) in at least one of: a first set of time-frequency resources (1201) and a second set of time-frequency resources (1202) in a frame (1200). The first and the second set of time-frequency resources (1201, 1202) are reserved for communication of reference signal and/or control information in a pre-arranged direction of: transmission and reception to or from one or more second communication nodes (512). The first communication node determines (1301) that the direction of communication of at least one of the first and second set is to be switched for at least one frame (1200). The first communication node also performs (1306) transmission or reception of control information in at least one of the first and second set of time-frequency resources (1202) according to the determined switched direction to or from, one or more third communication nodes (513).