Base station device, mobile station device, program, uplink synchronization requesting method, and synchronization-shift measurement signal transmitting method

A base station device included in a mobile communication system, the base station device comprising:

• a transmitter configured to transmit downlink control information which is used to selectively provide downlink scheduling or a random access order, on a physical downlink control channel to a mobile station device,
• a receiver configured to receive a random access preamble using a random access channel from the mobile station device based on transmitting the downlink control information which provides a random access order, wherein
• in a case that the downlink control information is used to provide the downlink scheduling, the downlink control information provides a downlink resource allocation, and
• in a case that the downlink control information is used to provide the random access order, a preset value is set for a field of the downlink resource allocation.

A processing method for a mobile station device included in a mobile communication system, the processing method comprising:

• receiving downlink control information which is used to selectively provide downlink scheduling or a random access order, on a physical downlink control channel from a base station device,
• transmitting a random access preamble using a random access channel to the base station device based on receiving the downlink control information which provides a random access order, wherein
• in a case that the downlink control information is used to provide the downlink scheduling, the downlink control information provides a downlink resource allocation, and
• in a case that the downlink control information is used to provide the random access order, a preset value is set for a field of the downlink resource allocation.

A processing method for a base station device included in a mobile communication system, the processing method comprising:

• transmitting downlink control information which is used to selectively provide downlink scheduling or a random access order, on a physical downlink control channel to a mobile station device,
• receiving a random access preamble using a random access channel from the mobile station device based on transmitting the downlink control information which provides a random access order, wherein
• in a case that the downlink control information is used to provide the downlink scheduling, the control information provides a downlink resource allocation, and
• in a case that the downlink control information format is used to provide the random access order, a preset value is set for a field of the downlink resource assignment.