| 摘要 |
PROBLEM TO BE SOLVED: To provide a base station device that can prevent erroneous detection of a random access preamble and a communication system comprising the base station device.SOLUTION: A base station device notifies, by notification unit 15, a mobile terminal device of preamble information indicating a random access preamble group which the mobile terminal device can select from a plurality of random access preambles prepared in advance. A determination unit 17 determines whether the preamble index (PID) of a random access preamble detected by a detection unit 16 is correct or not on the basis of the preamble information. If the determination unit 17 has not determined the PID detected by the detection unit 16 is correct, an estimation unit 18 estimates the correct PID. |
