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1. (WO2018222097) A NETWORK NODE, AN OPTICAL TRANSCEIVING UNIT AND METHODS THEREIN FOR DETERMINING INFORMATION ASSOCIATED WITH AN OPTICAL FIBER

Pub. No.:    WO/2018/222097    International Application No.:    PCT/SE2017/050589
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Sat Jun 03 01:59:59 CEST 2017
IPC: H04B 10/071
Applicants: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Inventors: ROSA DORTSCHY, Adriana
DORTSCHY, Boris
Title: A NETWORK NODE, AN OPTICAL TRANSCEIVING UNIT AND METHODS THEREIN FOR DETERMINING INFORMATION ASSOCIATED WITH AN OPTICAL FIBER
Abstract:
Embodiments herein relate to a method in a network node (110, 111) for determining information associated with an optical fiber (131) in a communications network (100). The optical fiber (131) is connected to an optical transceiver unit (121). The network node (110, 111) configures the optical transceiver unit (121) to transmit at least one first optical signal via the optical fiber (131), wherein the at least one first optical signal is an optical pulse train defined by a determined period. The network node (110, 11) then obtains information associated with at least one second optical signal received by the optical transceiver unit (121) via the optical fiber (131) in response to the transmitted at least one first optical signal. Thus, the network node (110, 111) may determine information associated with the optical fiber (131) based on the obtained information. Embodiments of the network node (110, 111) are also described. Embodiments herein also relate to an optical transceiver unit (121) for enabling a determination of information associated with an optical fiber (131) in a communications network (100) and methods therein.