Terminals, wireless communication methods, base stations and systems

Claims

1. A receiving unit that receives upper-layer parameters instructing the setting of terminal-based timing advance (TA) measurement for candidate cells, The system includes a control unit that performs terminal-based TA measurement based on the aforementioned upper-layer parameters, The control unit, when measuring the terminal (TA) using the terminal-based TA measurement, receives a physical downlink control channel (PDCCH) order, and executes a random access procedure based on the PDCCH order.

2. The terminal according to claim 1, wherein the control unit determines that the TA is valid based on predetermined signaling.

3. The terminal according to claim 1, further comprising a transmitting unit that reports the ability to support the aforementioned terminal-based TA measurement.

4. The steps include receiving higher-layer parameters that instruct the setting of terminal-based timing advance (TA) measurement for candidate cells, The steps include performing the terminal-based TA measurement based on the aforementioned upper-layer parameters, A wireless communication method for a terminal, comprising the step of performing a random access procedure based on the PDCCH order when measuring the terminal using the terminal-based TA measurement and receiving a physical downlink control channel (PDCCH) order.

5. A transmission unit that sends higher-layer parameters to the terminal instructing the setting of terminal-based timing advance (TA) measurement for candidate cells, The system includes a control unit that instructs the terminal to measure TA using the terminal-based TA measurement based on the upper layer parameters, The control unit, when the TA is measured, instructs the base station to perform a random access procedure by transmitting a physical downlink control channel (PDCCH) order to the terminal.

6. A system having a terminal and a base station, The terminal includes a receiving unit that receives upper-layer parameters instructing the setting of terminal-based timing advance (TA) measurement for candidate cells, The system includes a control unit that performs terminal-based TA measurement based on the aforementioned upper-layer parameters, When the control unit measures the TA using the terminal-based TA measurement and receives a physical downlink control channel (PDCCH) order, it executes a random access procedure based on the PDCCH order. The base station includes a transmitting unit that transmits the upper layer parameters, The system includes a control unit that instructs the terminal to measure the TA based on the aforementioned upper layer parameters, The control unit, when the TA is measured, instructs the terminal to execute the random access procedure by transmitting the PDCCH order.