Communication device and integrated circuit

摘要

Provided is a radio communication base station device which can suppress a use amount of an SRS communication resource. In this device, a correlation rule setting unit (102) sets a rule for correlating a preamble with an SRS transmission time interval so that the preamble transmission time band and the SRS transmission time band are in the same transmission time band. An SRS transmission band decision unit (103) decides a time interval of a transmission time band which can transmit the SRS according to the preamble transmission time interval inputted from a preamble transmission band decision unit (101) and the correlation rule setting unit (102).

主权项

1. A communication device, comprising:
a receiving unit configured to:
receive configuration information indicating subframes in which Sounding Reference Signals (SRSs) may be transmitted from the communication device; andreceive configuration information indicating subframes in which random access preambles may be transmitted from another communication device, the random access preamble including a cyclic prefix added to a beginning of the random access preamble, the random access preamble being followed by a guard time, the guard time being a non-transmission period; a mapping unit configured to map an SRS to a last portion of a subframe, wherein when the random access preamble is transmitted from the other communication device in the subframe, the SRS is temporally aligned with the guard time; and a transmitting unit configured to transmit the mapped SRS.