Dynamic TDD Configuration for Adaptive Uplink Timing
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Solution Overview
Problem
Current mobile communication systems, particularly LTE-A, face challenges in efficiently managing uplink and downlink resource allocation in TDD mode due to the need for frequent changes in TDD configuration, which affects interference mitigation and traffic adaptation.
Innovation Solution
A method and apparatus that dynamically configure TDD settings in user equipment and base stations by transmitting dynamic TDD configuration information, allowing for adaptive TDD cycle adjustments based on uplink grants received from the base station, enabling flexible uplink transmission timing determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic TDD configuration is implemented to adapt to changing traffic conditions, then adaptability and resource allocation efficiency are improved, but system complexity and configuration management difficulty increase
Solution Approach 1:
The patent implements dynamic TDD configuration where the base station can change TDD configuration information at different time points based on traffic conditions. The system transitions from static to dynamic configuration, allowing flexible adjustment of uplink-downlink subframe ratios to adapt to varying traffic demands while maintaining manageable complexity through centralized base station control
Solution Approach 2:
The patent changes the TDD configuration parameters (uplink-downlink subframe allocation ratios) dynamically based on traffic conditions. By adjusting these parameters at different time points, the system achieves adaptability to changing traffic patterns while the base station manages the complexity of parameter changes centrally
2Productivity
If TDD configuration changes frequently to optimize resource allocation, then resource utilization efficiency is improved, but system stability and configuration reliability deteriorate
Solution Approach 1:
The patent implements periodic TDD configuration changes where the base station adjusts configuration at specific time points based on traffic conditions. This periodic approach allows the system to achieve good resource allocation efficiency through regular optimization while maintaining stability by avoiding excessive or arbitrary configuration changes
Solution Approach 2:
The system uses feedback mechanisms where the base station monitors traffic conditions and adjusts TDD configuration accordingly. This feedback-based approach ensures that configuration changes are made only when necessary, balancing resource allocation efficiency with configuration stability and reliability
3Adaptability or versatility
If multiple TDD configurations are supported for different uplink grant reception methods, then adaptability to different reception scenarios is improved, but device complexity and operation difficulty increase
Solution Approach 1:
The patent makes the terminal capable of supporting multiple TDD configuration types (first type for first uplink grant reception method, second type for second method). This multi-functionality allows the terminal to adapt to different uplink grant reception scenarios while the base station manages the complexity of coordinating between different configuration types
Data Source
AI summary
A method for configuring a time division duplex (TDD) of a user equipment in a communication system, according to one embodiment of the present invention, comprises the steps of: receiving from a base station a first TDD configuration; receiving from the base station a message including information related to a dynamic TDD configuration; receiving a second TDD configuration according to the received information related to the dynamic TDD configuration; receiving from the base station an uplink grant; and determining whether to apply the first TDD configuration or the second TDD configuration based on a method by which the unlink grant is received. According to one embodiment of the present invention, the advantages of configuring a shorter cycle of the TDD to the user equipment supporting the TDD in a wireless communication system, and rapidly configuring the TDD to the user equipment variably according to a communication situation are provided.