Mobile communication system, base station apparatus and mobile station apparatus

摘要

To prevent a collision from occurring at the time of random access in cases such as handover, response to paging and the like where a mobile station apparatus performs random access in response to directions from a base station apparatus. In a mobile communication system in which a mobile station apparatus 200 uses a signature of a beforehand determined signature group at the time of random access with a base station apparatus 100, the signature group is comprised of a signature group managed by the base station apparatus 100 and another signature group managed by the mobile station apparatus 200. The signature group managed by the base station apparatus 100 includes signatures associated with particular random access reasons to be selected by the base station apparatus 100.

主权项

1. A base station configured to communicate with a mobile station, comprising:
circuitry configured or programmed to transmit a parameter indicating a value to the mobile station, wherein
the value represents a count of randomly selectable signatures for the mobile station, and a count of non randomly selectable signatures for the mobile station, a signature is randomly selected, by the mobile station, from the randomly selectable signatures specified based on the value, each signature of the randomly selectable signatures is one of a constant number of usable signatures, each signature of the non randomly selectable signatures is one of the constant number of the usable signatures, and each signature of all the usable signatures is usable in random access.