Title:
RADIO TELEPHONE CALL SYSTEM
Document Type and Number:
Japanese Patent JP3461462
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a radio telephone call system by a time-division duple radio equipment with which a wide telephone call area can be easily obtained by switching plural base stations.
SOLUTION: A mobile station sends a synchronizing request signal at a specific frequency and a base station receiving it sends an identification response synchronizing signal. The mobile station sends a telephone call switching synchronizing signal including the identification code of a base station having a higher reception level of the identification response synchronizing signal and the base station enters a telephone mode when the identification code included in the telephone call switching synchronizing signal is the code indicating itself or a monitor mode when not. Plural base stations can automatically be switched according to the intensity of an electric field.
Inventors:
Mitsuo Shiraishi
Application Number:
JP15677199A
Publication Date:
October 27, 2003
Filing Date:
June 03, 1999
Export Citation:
Assignee:
Hitachi Kokusai Electric Co., Ltd.
International Classes:
H04J3/00; H04L7/00; H04W16/26; H04W48/16; H04W48/20; H04W56/00; (IPC1-7): H04Q7/22; H04J3/00; H04L7/00; H04Q7/28
Domestic Patent References:
| JP8335931A | ||||
| JP5136004A | ||||
| JP7284142A |
Attorney, Agent or Firm:
Kenjiro Take