Procedure to watch several radio channels at radio communication
AssigneeTelefonaktiebolaget L M Ericsson
InventorKarl Bengt Hakan Lundberg
Life of this patent
Estimating the term…
Abstract
During communication in a system for radio communication where stations are called with selective calls the participating stations watch for priority calls on a number of other radio channels. The watching is performed by listening in to the other channels at each switching from transmission to reception and vice versa and also at time intervals if the switching is overly late.
Claims6
In a radio communication system having a plurality of transmitting and receiving stations and a plurality of radio channels which are intended for the transmission of selective calls, the method, while a communication is occurring between a transmitting station having a transmitter and a receiver and a receiving station, having a transmitter and a receiver performed by the transmitting station of watching for calls to the transmitting station on any of a plurality of selected radio channels on which calls are expected, said method comprising the steps of sequentially tuning the receiver of the transmitting station to each of the plurality of selected radio channels and sensing for signals on the selected radio channels for a given period of time whenever the transmitting station is switched from the transmit to receive mode.
In a system for radio communication, which comprises a number of transmitting and receiving stations and a number of radio channels, and which is intended for the transmission of selective calls, the method while a communication between a transmitting and a receiving station, each including a transmitter on over a first communications channel, of watching a number of selected radio channels, on which calls are expected, for calls to the stations, said method comprising the steps:
- tuning the receiver of the transmitting station to each selected radio channel in turn and listening for a given period of time for calls directed to the transmitting station each time the transmitting station is switched from transmission to reception;
- and
- tuning the receiver of the receiving station to each selected radio channel in turn and listening for said given period of time for calls directed to the receiving station at each break in reception of signals from the transmitting station where the tuning to each selected radio channel is separated by tuning to the normal communication channel for a period of time which is a fraction of said given period of time.
Dependencies are inferred from the claim text.