Conditional Uplink Timing Alignment in a Mobile Station Device of a Radio Communication System

摘要

A mobile station device transmits a random access preamble to a base station device. The base station device receives the random access preamble from the mobile station device and transmits, to the mobile station device, a Random Access—Radio Network Temporary Identity (RA-RNTI) which notifies a resource assignment of a random access response. The mobile station device further monitors downlink control channels while detecting both a Cell—Radio Network Temporary Identity (C-RNTI) and the RA-RNTI, in which a downlink control channel includes the RA-RNTI and a downlink control channel includes the C-RNTI which notifies a resource assignment of downlink data. Upon detection of the C-RNTI and the RA-RNTI in a same sub-frame, the mobile station receives both the random access response and the downlink data, or receives either the random access response or the downlink data.

主权项

1. A radio communication system including:
a mobile station device; and a base station device, wherein the mobile station device is configured to transmit a random access preamble to the base station device, and the base station device is configured to receive the random access preamble from the mobile station device and to transmit a Random Access—Radio Network Temporary Identity (RA-RNTI) to the mobile station device, wherein the mobile station device is further configured:
to monitor downlink control channels while detecting both a Cell—Radio Network Temporary Identity (C-RNTI) and the RA-RNTI; a downlink control channel including the RA-RNTI notifies a resource assignment of a random access response; and a downlink control channel including the C-RNTI notifies a resource assignment of downlink data, andto receive, upon detection of the C-RNTI and the RA-RNTI in a same sub-frame, both the random access response and the downlink data, or either the random access response or the downlink data.