Radio reception device and radio reception method

摘要

Disclosed are a radio transmission device and a radio transmission method which reduce the RACH conflict ratio and improve the RACH detection characteristic. When the device and the method are used: as the number of signature numbers allocated for UE by the network side increases, the condition for allocating a signature by UE itself is mitigated and an expectation value which is a statistic average value of the RA quantity using the signature allocated by UE for itself is decreased; and as the number of signature numbers allocated for UE by the network side decreases, the condition for allocating a signature by UE itself is limited and an expectation value of the RA quantity using the signature allocated by UE for itself is increased.

主权项

1. A communication apparatus, comprising:
a transmitter, which, in operation, transmits first information to a first mobile station, the first information including a signature identifier (ID) associated with an ID of the first mobile station; and a receiver, which, in operation, receives from the first mobile station a first Random Access Signature indicated by the signature ID included in the first information, and receives from a second mobile station a second Random Access Signature randomly selected by the second mobile station from among a plurality of Random Access Signatures, wherein the transmitter, in operation, transmits second information indicating a quantity of the plurality of Random Access Signatures.