Mobile station device, base station device, wireless communication system and transmission method

A base station device that performs communication with a communication device, comprising:

• a scheduling unit that configures a band for contention based transmission including a plurality of allocated bands which are selectable by the communication device;
• and
• a transmission unit that notifies the communication device of information indicating the configured band for the contention based transmission,
• wherein at least one of the plurality of allocated bands is configured to partially overlap another one of the plurality of allocated bands.

A communication device that performs communication with a base station device, comprising:

• a reception unit that receives a signal from the base station device;
• a detection unit that detects information indicating a band for contention based transmission including a plurality of selectable allocated bands, from the signal;
• and
• a transmission unit that selects one allocated band from the plurality of allocated bands based on the detected information indicating the band for the contention based transmission, and transmits a contention based signal,
• wherein at least one of the plurality of allocated bands overlaps another one of the plurality of allocated bands in a portion of the band.

A transmission method used in a communication device that performs communication with a base station device, comprising:

• receiving a signal from the base station device;
• detecting information indicating a band for contention based transmission including a plurality of selectable allocated bands, from the signal;
• and
• selecting one allocated band from the plurality of allocated bands based on the detected information indicating the band for the contention based transmission, and transmitting a contention based signal,
• wherein at least one of the plurality of allocated bands partially overlaps another one of the plurality of allocated bands.