Patent ID: 6469989
Filing Date: 2002-10-22
Classification: B60C,H04B,H04W,Y02D

Abstract:
A method of transmitting data in a data transmission system which includes: a central unit which is intermittently in a stand-by mode and intermittently in a data-receive mode; a plurality of transmitters for sending data transmissions to said central unit at time intervals; and, means for generating a switch-on signal to switch said central unit from said stand-by mode into said data-receive mode; and, said central unit being in said data-receive mode during said data transmission; the method comprising the steps of:causing each one of said transmitters to send data transmissions to said central unit at time intervals and each of said data transmissions containing information as to at which time interval the next data transmission is to be expected from said one transmitter; on the basis of said information, determining a time point in said central unit at which, after receipt of a data transmission of one of said transmitters, the next data transmission can be expected from said one of said transmitters; and, generating said switch-on signal in said central unit shortly before the time point at which the next data transmission is to be expected.