Patent ID: 7580677
Filing Date: 2009-08-25
Classification: H04B,H04L,H04M,H04W,Y02D

Abstract:
1. A method of establishing a communications link for exchanging digital signals in the form of characters between a transmitter and a receiver, said digital signals being transmitted according to the IrDA protocol, wherein the transmitter for initialization of a communications link transmits a series of start characters, the method comprising the steps of: controlling the receiver to alternate periodically between a first state in which characters can be detected, and a second state in which detection of characters is not possible, with a period shorter than the duration of the series of start characters, the receiver having a power consumption which is higher in the first state than in the second state, and the alternation being controlled such that in each period the receiver assumes the first state for a time which is longer than the duration of a start character; and establishing a communications link if a character is detected, wherein the start characters are according to the IrDA protocol.