FDD Frame Structure Delay Configuration for Resource Utilization
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Solution Overview
Problem
In frequency division duplex systems, the direct reuse of frame structures designed for time division duplex systems leads to a waste of system resources, as they do not fully utilize radio resources and require separate devices for different frequency bands, increasing research and development costs.
Innovation Solution
Implementing a communication method that uses a second transmission frame structure with a fixed delay relative to the first transmission frame structure, allowing for efficient utilization of radio resources by balancing load on different time-frequency resources and enabling the reuse of a single terminal device across different frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a frame structure designed for TDD system is directly used in FDD system, then a same terminal device can be reused, but system resources are wasted
Solution Approach 1:
The patent introduces dynamic frame structure configuration where the network device can dynamically adjust the frame structure parameters (such as uplink/downlink slot ratios, resource allocation) according to actual traffic conditions and spectrum characteristics. This allows the system to adapt the TDD-designed frame structure to FDD operations dynamically, improving resource utilization while maintaining terminal device reusability through software-based configuration rather than hardware redesign
Solution Approach 2:
The patent changes key parameters of the frame structure including slot configuration, resource block allocation, and timing relationships to optimize FDD spectrum usage. By modifying these parameters, the system can eliminate resource waste caused by fixed TDD-oriented configurations while keeping the same terminal device hardware, thus resolving the contradiction between adaptability and resource efficiency
2Device complexity
If uplink/downlink resources each occupy 50% of total resources in FDD system, then frame structure simplicity is maintained, but system resource efficiency decreases
Solution Approach 1:
The patent implements dynamic resource allocation where the proportion of uplink/downlink resources can be adjusted in real-time based on traffic demands. Instead of fixed 50/50 allocation, the system can dynamically set resource ratios (e.g., 60/40 or 70/30) to match actual usage patterns, thereby improving productivity without significantly increasing frame structure complexity through standardized configuration mechanisms
Solution Approach 2:
The patent segments the frame structure into configurable units (slots, resource blocks) that can be independently allocated and adjusted. This segmentation allows flexible resource distribution while maintaining overall frame structure simplicity through modular design, enabling efficient resource utilization without requiring complete restructuring of the frame format
Data Source
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AI summary
Embodiments of this application provide a communication method in a frequency division duplex system, a related device, and a system. The method includes: A first terminal device receives first dedicated signaling sent by a network device, and obtains a first configuration message. The first terminal device sends, based on the first configuration message, first information to the network device by using a second transmission frame structure, and receives second information that is sent by the network device by using the second transmission frame structure. The second transmission frame structure has a first fixed delay relative to a first transmission frame structure, and the first transmission frame structure is a frame structure that is used by a second terminal device to send third information to the network device and that is used by the network device to send fourth information to the second terminal device. According to the foregoing method, radio resources in the system can be effectively utilized, and load on different time-frequency domain resources can be balanced.