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 clear 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 configuration that sets multiple uplink-downlink configurations, allowing for the monitoring and transmission of sounding reference signals based on specific control information formats, enabling efficient uplink signal transmission according to base station scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a flexible subframe is used to enable traffic adaptation, then throughput can be considerably improved, but a specific procedure for terminal device uplink signal transmission based on base station scheduling was not described
Solution Approach 1:
The base station device transmits downlink control information in advance to schedule uplink signal transmission. The terminal device receives and follows the scheduling instructions, ensuring that uplink transmissions are coordinated with downlink resource allocation before actual transmission occurs.
Solution Approach 2:
The system implements scheduling feedback where the base station device monitors uplink traffic conditions and dynamically adjusts downlink control information to optimize uplink resource allocation. This feedback mechanism ensures efficient utilization of flexible subframes for both uplink and downlink transmissions.
2Adaptability or versatility
If multiple uplink-downlink configurations are set for dynamic TDD, then traffic adaptation is achieved, but device complexity increases due to monitoring multiple configurations
Solution Approach 1:
The system employs dynamic TDD where uplink-downlink configurations can change over time based on traffic conditions. The base station device dynamically selects which configuration to use for each flexible subframe, allowing the system to adapt to varying traffic patterns while maintaining manageable complexity through centralized control.
Solution Approach 2:
The downlink control information format is designed to universally handle multiple configurations. A single control message structure can indicate scheduling decisions across different uplink-downlink configurations, reducing the need for separate monitoring mechanisms for each configuration type.
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 or drops the sounding reference signal and transmit an HARQ-ACK for transmission with the physical downlink shared channel.