Login| Sign Up| Help| Contact|

Patent Searching and Data

Document Type and Number:
Japanese Patent JPH0818479
Kind Code:

PURPOSE: To provide a transmitter-receiver capable of searching a free channel in a short time by starting a search from a channel used at the end of previous communication.

CONSTITUTION: After the output of a reception signal level detector 24 in the channel at present is tentatively stored, the channel is switched and the size relation of the output value of the reception signal level detector 24 in the switched channel and the stored output value is judged. Then, when the channel for which a reception signal level is lowest is found from the specified number of the channels, channel signals are transmitted by the channel at present. Since the free channel is searched from the channel used at the end of the previous communication and the communication immediately becomes possible when the channel is free, search time is shortened. Also, since an opposite party is called by the held channel even when no response is present, the need of performing a search operation again is eliminated.

Yamaguchi, Masanobu
Matsuo, Mitsuaki
Kitamura, Kazuhisa
Application Number:
Publication Date:
January 19, 1996
Filing Date:
July 04, 1994
Export Citation:
Click for automatic bibliography generation   Help
International Classes:
H04B1/38; H04W36/06; H04W36/30; H04W36/36; H04W72/08; (IPC1-7): H04B1/38; H04Q7/28