Radio communication system, base station apparatus, mobile station apparatus, and radio communication method

摘要

A radio communication system includes a plurality of mobile station apparatuses and a base statement apparatus. Each of the mobile station apparatuses selects the lowest number and the second lowest number of control channel elements (CCEs) in which downlink allocation information is detected, and obtains two combinations, to be applied to transmission antennas, of a physical resource block (PRB), a cyclic shift amount, and an orthogonal code sequence in the time domain, on the basis of values by adding the numbers of CCEs to an offset value broadcast by the base station apparatus. Each of the mobile station apparatuses spreads pilot signals using spread codes based on the two combinations, arranges the spread pilot signals in PRBs corresponding to the signals, and transmits the signals through the transmission antennas.

主权项

1. A radio communication system comprising:
a plurality of mobile station apparatuses and a base station apparatus, wherein: the base station apparatus is configured and/or programmed to transmit data, downlink allocation information indicating a result of scheduling of the data the downlink allocation information used for the scheduling of the data, an offset value, and a first value used for deriving a spread code and an uplink radio resource; and each of the mobile station apparatuses is configured and/or programmed to receive, from the base station, the data, the downlink allocation information, the offset value, and the first value, derive a plurality of spread codes and a plurality of uplink radio resources on the basis of the first value and a second value, the second value being derived by adding a lowest number of control channel element(s) in which the downlink allocation information is received to the offset value, spread pilot signals, which are to be used for compensating propagation paths by the base station apparatus, by using each of the derived spread codes determined based on the first value and the second value, and transmit the spread pilot signals in the plurality of derived uplink radio resources through a plurality of transmission antennas.