RADIO COMMUNICATION DEVICE, BASE STATION, SUBSCRIBER CONTROL SERVER, TIME SERVER, TIME CORRECTION METHOD AND TIME-INFORMATION TRANSMISSION METHOD

Title:

RADIO COMMUNICATION DEVICE, BASE STATION, SUBSCRIBER CONTROL SERVER, TIME SERVER, TIME CORRECTION METHOD AND TIME-INFORMATION TRANSMISSION METHOD

Document Type and Number:

Japanese Patent JP3872644

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To reduce the labor of a user regarding the correction of the time of a portable terminal.
SOLUTION: When the power supply of the portable terminal 10 is turned on, the portable terminal 10 transmits, to a base station 20, a signal (a time- information request-to-send signal) requesting the transmission of time information. When the base station 20 receives the request-to-send signal, it transmits the time information to the portable terminal 10. When the portable terminal 10 receives the time information, it corrects the time on the basis of the time information.

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Inventors:

Takashi Shimizu
Hideaki Shima
Hiroaki Ishikawa
Haruo Fukaya
Naonobu Yamashita

Application Number:

JP2000354844A

Publication Date:

January 24, 2007

Filing Date:

November 21, 2000

Export Citation:

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Assignee:

NTT DoCoMo, Inc.

International Classes:

G04G5/00; G04R20/00; G04R20/14; H04W8/24; (IPC1-7): G04G5/00; G04G7/02; H04Q7/38

Domestic Patent References:

JP2000287273A
JP8213961A
JP2000258566A
JP7322346A
JP10004583A
JP2000138969A
JP9018959A

Foreign References:

WO1999048228A1

Attorney, Agent or Firm:

Kenichi Kakinuma
Yoshikazu Tani
Kazuo Abe

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