<p>The present invention relates to a method for detecting or inferring a physical disturbances on a communications link, in particular by using distributed backscattering. The method includes the steps of: transmitting test signals onto a link; receiving test signals returned from a remote portion of the link; performing a function on the returned test signals; and in dependence on at least one characteristic of the combination signal, inferring the presence of a disturbance. The test signal are returned by a process Rayleigh backscattering along the fibre, so existing fibre installations can be used without requiring a mirror to be specifically introduced.</p>
申请公布号
WO2006035205(A1)
申请公布日期
2006.04.06
申请号
WO2005GB03680
申请日期
2005.09.26
申请人
BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY;SIKORA, EDMUND, SERGIO, ROBERT;HEALEY, PETER