Terminal Device Uplink Scheduling via Dynamic TDD Configuration
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Solution Overview
Problem
The existing radio communication systems, particularly in LTE, lack a detailed procedure for terminal devices to transmit uplink signals based on scheduling by the base station device, leading to inefficiencies in communication.
Innovation Solution
The implementation of a terminal device and base station device communication method that sets and manages multiple uplink-downlink configurations, allowing for the transmission and reception of sounding reference signals based on specific subframe configurations, ensuring efficient uplink signal transmission according to base station scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a terminal device transmits an uplink signal based on scheduling by a base station device in dynamic TDD systems, then communication efficiency is improved, but the procedure for signal transmission is not clearly defined leading to communication reliability issues
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the uplink-downlink configuration parameters based on traffic conditions. The base station device changes the third uplink-downlink configuration to adapt to varying traffic demands, allowing flexible subframes to be dynamically assigned as uplink or downlink subframes, thereby improving communication efficiency while maintaining reliability through defined transmission procedures.
Solution Approach 2:
The patent implements dynamics through the introduction of dynamic TDD where the uplink-downlink configuration can change over time. The base station device dynamically adjusts the configuration to match traffic patterns, and the terminal device follows scheduled transmission procedures, creating a dynamic yet reliable communication system.
2Productivity
If multiple uplink-downlink configurations are managed for traffic adaptation, then throughput is considerably improved, but the complexity of configuration management increases
Solution Approach 1:
The patent applies segmentation by dividing the configuration management into distinct layers: first uplink-downlink configuration for HARQ timing, second uplink-downlink configuration for reference purposes, and third uplink-downlink configuration for dynamic traffic adaptation. This segmentation allows complex throughput optimization to be managed through structured, modular configuration handling.
Solution Approach 2:
The patent uses preliminary action by pre-defining multiple uplink-downlink configurations (first, second, and third configurations) before dynamic traffic adaptation begins. The base station device prepares these configurations in advance, allowing seamless switching and adjustment based on traffic conditions without real-time computation complexity.
3Productivity
If flexible subframes are used for traffic adaptation, then resource allocation efficiency is improved, but interference management becomes more challenging
Solution Approach 1:
The patent implements feedback mechanisms where the base station device monitors traffic conditions and adjusts the third uplink-downlink configuration accordingly. This feedback loop allows the system to optimize resource allocation efficiency while managing interference by adapting to actual channel conditions and traffic patterns, ensuring that flexible subframes are used appropriately.
Data Source
AI summary
According to the present invention, there are provided a base station device, a terminal device, a communication method, and an integrated circuit capable of performing communication more efficiently when the terminal device transmits an uplink signal based on scheduling by the base station device. The terminal device includes a setting unit that sets a first uplink-downlink configuration, a second uplink-downlink configuration, and a third uplink-downlink configuration, a reception unit that monitors a physical downlink control channel accompanied with a downlink control information format which is used to schedule a physical downlink shared channel in a downlink subframe based on the third uplink-downlink configuration and includes information making a request for transmitting a sounding reference signal, and a transmission unit that transmits the sounding reference signal based on the information making the request to transmitting the sounding reference signal.