Radio communication system

• US 4,977,608 A
• Filed: 01/02/1990
• Issued: 12/11/1990
• Est. Priority Date: 06/23/1984
• Status: Expired due to Term

• Current Assignee: Kenwood USA Corporation (JVC Kenwood Corporation)
• Original Assignee: Kabushiki Kaisha Kenwood
• Inventors: Hashimoto, Kiroyuki, Suzuki Akira, Iizuka, Nobuo
• Primary Examiner(s): Olms, Douglas W.
• Assistant Examiner(s): Smith, Ralph
• Application Number:
  US07/462,336
• Time in Patent Office: 343 Days
• Field of Search: 455/62, 455/34, 455/68, 455/69, 455/70, 455/53, 455/49, 455/54, 455/33, 455/76, 455/77, 455/88
• US Class Current: 455/62
• CPC Class Codes: H04W 36/06 Reselecting a communication resource in the serving access point
• CPC Class Codes: H04W 4/10 Push-to-Talk [PTT] or Push-On-Call services
• CPC Class Codes: H04W 76/45 for Push-to-Talk [PTT] or Push-to-Talk over cellular [PoC] services

Abstract

In the radio communication system for performing a communication in the idle channel selected from a plurality of frequency channels, the originating call station transmits the station identification code to specify the distant station together with the idle channel data to be actually communicated, and the distant station designated by the station identification code shifts to the designated idle channel, and the communication is executed between two stations. During communication in a certain channel between two stations, in the case where a radio interference occurs in this channel and it is intended to shift to other channel, one station transmits the other channel data in the communication channel and the other station receives it, and the communication is continued each other in the other channel.

Claims

1. A transceiver comprising:

a register for storing a code of representing a frequency,

a transmitter for transmitting a signal at a channel frequency determined by the code set in said register;

means in response to a manual operation for generating an instruction signal indicative of a changeover of transmission channel frequency; and

control means responsive to a calling instruction for setting a code of representing a start channel frequency in said register so that said transmitter transmits a signal including a shift channel frequency information at the start channel frequency and thereafter for shifting and transmitted into the shift channel frequency to be in a transmission/reception state;

wherein said control means responsive to the transmission channel frequency changeover instruction changes over the contents of said register from the code of representing the start channel frequency to the code of representing the shift channel frequency or from the code of representing the shift channel frequency to the code of representing the start channel frequency.

2. A transceiver according to claim 1, wherein said start channel frequency is predetermined and said shift channel frequency is selected among idle channel frequencies.