BASE STATION, MOBILE STATION, SYNCHRONIZATION CONTROL METHOD, AND IC CHIP

• US 20110319116A1
• Filed: 09/09/2011
• Published: 12/29/2011
• Est. Priority Date: 06/19/2006
• Status: Active Grant

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Iwamura, Mikio, Ishii, Minami, Harada, Atsushi
• Granted Patent: US 8,280,392 B2
• Time in Patent Office: Days
• US Class Current: 455/517
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0027 Scheduling of signalling, e.g. occurrence thereof
• CPC Class Codes: H04W 56/004 compensating for timing error of reception due to propagation delay
• CPC Class Codes: H04W 56/005 compensating for timing error by adjustment in the receiver
• CPC Class Codes: H04W 56/0065 using measurement of signal travel time
• CPC Class Codes: H04W 92/10 between terminal device and access point, i.e. wireless air interface
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A radio communication method in which a mobile station receives signaling information transmitted by a base station via a shared control channel, detects a presence/absence of data addressed to the mobile station, demodulates a shared data channel when the data is present, and receives data transmitted by the base station. The method includes the steps of transmitting, from the base station to the mobile station, a synchronization request via the shared control channel and transmitting, at the mobile station, feedback information including channel quality information, as a response to the synchronization request, via a random access channel. The method also includes generating, at the base station, timing advance information when receiving the feedback information, and transmitting, from the base station to the mobile station, the timing advance information, and adjusting, at the mobile station, a transmission timing of uplink data based on the timing advance information.

Claims

1-12. -12. (canceled)

13. A radio communication method in which a mobile station receives signaling information transmitted by a base station via a shared control channel, detects a presence/absence of data addressed to the mobile station, demodulates a shared data channel when the data is present, and receives data transmitted by the base station, the method comprising the steps of:

transmitting, from the base station to the mobile station, a synchronization request via the shared control channel;

transmitting, at the mobile station, feedback information including channel quality information, as a response to the synchronization request, via a random access channel;

generating, at the base station, timing advance information when receiving the feedback information, and transmitting, from the base station to the mobile station, the timing advance information; and

adjusting, at the mobile station, a transmission timing of uplink data based on the timing advance information.

14. A base station used in a radio communication system in which a mobile station receives signaling information transmitted by a base station via a shared control channel, detects a presence/absence of data addressed to the mobile station, demodulates a shared data channel when the data is present, and receives data transmitted by the base station, comprising:

a synchronization request transmitting unit configured to transmit, to the mobile station, a synchronization request via the shared control channel;

a feedback information receiving unit configured to receive, from the mobile station, feedback information including channel quality information, as a response to the synchronization request, via a random access channel; and

a timing advance information generating/transmitting unit configured to generate timing advance information when receiving the feedback information, and to transmit, to the mobile station, the timing advance information.

15. A mobile station configured to receive signaling information transmitted by a base station via a shared control channel, to detect a presence/absence of data addressed to the mobile station, to demodulate a shared data channel when the data is present, and to receive data transmitted by the base station, comprising:

a synchronization request receiving unit configured to receive, from the base station, a synchronization request via the shared control channel;

a feedback information transmitting unit configured to transmit feedback information including channel quality information, as a response to the synchronization request, via a random access channel; and

an adjusting unit configured to adjust a transmission timing of uplink data, based on timing advance information transmitted by the base station.

16. An IC chip having a function of a mobile station configured to receive signaling information transmitted by a base station via a shared control channel, to detect a presence/absence of data addressed to the mobile station, to demodulate a shared data channel when the data is present, and to receive data transmitted by the base station, wherein the mobile station comprises:

a synchronization request receiving unit configured to receive, from the base station, a synchronization request via the shared control channel;

a feedback information transmitting unit configured to transmit feedback information including channel quality information, as a response to the synchronization request, via a random access channel; and

an adjusting unit configured to adjust a transmission timing of uplink data, based on timing advance information transmitted by the base station.