Patent ID: 9125194
Filing Date: 2015-09-01
Classification: H04L,H04W

Abstract:
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.