LTE TDD Special Subframe Configuration Flexibility
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Solution Overview
Problem
The existing LTE TDD system has limited flexibility in special subframe ratio configuration, as it remains unchanged for several hundred milliseconds, which is inadequate for dynamic adjustments needed in modern communication scenarios.
Innovation Solution
A method and device for generating and determining subframes with varying guard period durations, allowing for flexible configuration of special subframes within a broadcast control channel modification period, enabling dynamic adjustments of subframe ratios in real-time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the special subframe ratio is configured using system broadcast message update, then the system maintains stability and compatibility with existing LTE TDD protocols, but the flexibility of special subframe ratio is low and remains unchanged for several hundred milliseconds
Solution Approach 1:
The patent segments the special subframe configuration into multiple patterns (first special subframe pattern and second special subframe pattern) that can be independently selected and applied. This allows the system to switch between different special subframe ratios without waiting for system broadcast message updates, thereby improving flexibility while maintaining protocol compatibility
Solution Approach 2:
The patent introduces dynamic selection mechanisms that allow the special subframe ratio to change based on real-time conditions. Through indicators carried in downlink control information, the system can dynamically switch between different special subframe patterns within a radio frame, enabling rapid adaptation without being constrained by the slow system broadcast message update cycle
2Adaptability or versatility
If multiple special subframe patterns are introduced for dynamic selection, then the flexibility and real-time adjustment capability are improved, but the device complexity and signaling overhead increase
Solution Approach 1:
The patent applies local quality by introducing indicators at the subframe level (through downlink control information) rather than requiring global reconfiguration. This allows specific subframes to be dynamically adjusted based on local conditions, achieving real-time adaptability without requiring complex system-wide changes
Solution Approach 2:
The patent designs the indicator mechanism to serve multiple functions: it can indicate the second special subframe pattern, trigger point information, and coordinate with uplink grant information. This multi-functionality reduces the need for separate signaling mechanisms, thereby limiting the increase in device complexity while achieving real-time adjustment capability
Data Source
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AI summary
This application provides a method and device for generating a subframe, a method for determining a subframe and a user equipment. The method for generating a subframe includes: determining, by a first device, patterns of at least two special subframes used in a broadcast control channel modification period, where guard period GP durations of the at least two special subframes are different; and generating, by the first device, the at least two special subframes. The method enhances flexibility and improves a system resource utilization rate.