公开(公告)号：US20200209106A1

公开(公告)日：2020-07-02

申请号：US16632421

申请日：2018-07-18

Applicant: British Telecommunications Public Limited Company

Inventor： Neil PARKIN ,  Malcolm CAMPBELL

IPC: G01M11/00 ,  G02B6/02 ,  G02B6/38

Abstract: An optical fiber including a plurality of embedded optical reflectors distributed periodically along the length of the fiber and a method of quantifying loss associated with an optical connector that is connected to optical fiber comprising a plurality of embedded optical reflectors distributed periodically along the length of the fiber. The method includes inserting an optical signal into the fiber through the optical connector; measuring a component of the optical signal reflected by at least one of the plurality of embedded optical reflectors, in which the component is received through the optical connector; calculating the difference in power level between the inserted and reflected signals; and quantifying, based on the calculated power level difference and the reflectivity of the embedded optical reflector, the loss associated with the optical connector.

公开(公告)号：US20230353911A1

公开(公告)日：2023-11-02

申请号：US18006468

申请日：2021-06-29

Applicant: BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY

Inventor： Catherine WHITE ,  Neil PARKIN

IPC: H04Q11/00 ,  H04B10/25

CPC classification number: H04Q11/0062 ,  H04B10/25 ,  H04Q2011/0079

Abstract: An optical network comprising: an optical splitter configured to split an optical signal incident on the optical splitter into at least a control signal and a data signal; an optical switch; a first optical path configured to carry the control signal between the optical splitter and the optical switch; and a second optical path configured to carry the data signal between the optical splitter and the optical switch. The optical network is configured to transmit the control and data signals such that the data signal is incident on the optical switch after the control signal. The optical switch is configured to selectively switch the optical network between a first configuration and a second configuration in accordance with the control signal. The application also relates to a method of configuring an optical network.

公开(公告)号：US20170279523A1

公开(公告)日：2017-09-28

申请号：US15508635

申请日：2015-08-25

Applicant: BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY

Inventor： Neil PARKIN ,  Anas MOHSIN

IPC: H04B10/071 ,  H04B10/077 ,  H04Q11/00 ,  H04B10/25

Abstract: An optical network node capable of being powered, comprising—a reflector arranged to reflect an optical signal, and—a switch arranged to direct the optical signal to the reflector in dependence on whether the optical network node is powered.

公开(公告)号：US20240072853A1

公开(公告)日：2024-02-29

申请号：US18261707

申请日：2021-12-17

Applicant: BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY

Inventor： Andrew LORD ,  Anas AL RAWI ,  Neil PARKIN

IPC: H04B7/0456

CPC classification number: H04B7/0456

Abstract: A method of transmitting precoded signals can include precoding an optical signal to produce a precoded optical signal, transmitting a precoded optical signal over an optical portion of a first transmission channel, converting the precoded optical signal to a first MIMO signal, transmitting the first MIMO signal over a wireless portion of the first transmission channel, transmitting the precoded optical signal over an optical portion of a second transmission channel, converting the precoded optical signal to a second MIMO signal; transmitting the second MIMO signal over a wireless portion of the second transmission channel; wherein the precoding takes account of both first channel state information associated with the first transmission channel and second channel state information associated with the second transmission channel.

公开(公告)号：US20220385999A1

公开(公告)日：2022-12-01

申请号：US17754435

申请日：2020-06-23

Applicant: British Telecommunications Public Limited Company

Inventor： Neil PARKIN

IPC: H04Q11/00

Abstract: There is provided an optical network comprising first and second PONs, each including an OLT; one or more ONUs; and an optical splitter downstream of the OLT and upstream of the one or more ONUs. The splitter includes a plurality of inputs, one of the inputs being coupled to the OLT, and a plurality of outputs, each of the ONUs being coupled to one of the outputs. The optical network further includes an optical switch configured to switch the optical network from a first configuration to a second configuration in response to a fault being detected on the first PON. The second PON's splitter has a spare output that is uncoupled in the first configuration; and the first PON's splitter has a spare input that is: uncoupled in the first configuration, and coupled to the spare output of the second PON's splitter in the second configuration.

公开(公告)号：US20220284670A1

公开(公告)日：2022-09-08

申请号：US17597852

申请日：2020-06-18

Applicant: BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY

Inventor： Neil PARKIN ,  Anthony CONWAY

IPC: G06T17/05 ,  G06T7/00

Abstract: The present disclosure relates to predicting blockages in underground ducts. According to one aspect, there is provided a computer-implemented method of identifying one or more locations along a route for an underground duct which indicate a blockage risk, the route extending between two ends, the method including obtaining a terrain elevation profile for the route; estimating a duct elevation profile for the route based on the terrain elevation profile; and predicting one or more blockage risk locations along the route by determining where water entering the duct from each of the two ends would settle, based on the duct elevation profile.