Restorable architectures for fiber-based broadband local access networks
AssigneeAT&T Corp.
InventorsAlan H. Gnauck, Adel Abdel Moneim Saleh, Sheryl Leigh Woodward
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Abstract
The present invention provides a local access network, having a switching node, a passive remote node connected to an optical network unit, a first optical fiber that provides a dedicated connection between the switching node and the passive remote node, and a second optical fiber that provides a dedicated connection between the switching node and the passive remote node. A first portion of a first fiber-optic cable containing the first optical fiber does not contain any part of the second optical fiber, such that there are independent paths from the switching node to the passive remote node.
Claims36
A local access network, comprising:
- a switching node;
- a passive remote node connected to an optical network unit;
- a first optical fiber that provides a dedicated connection between the switching node and the passive remote node;
- and
- a second optical fiber that provides a dedicated connection between the switching node and the passive remote node;
- wherein a first portion of a first fiber-optic cable containing the first optical fiber does not contain any part of the second optical fiber.
A local access network, comprising:
- a switching node;
- a first passive remote node;
- a first optical fiber connecting the switching node to the first passive remote node;
- a second passive remote node;
- a second optical fiber connecting the switching node to the second passive remote node;
- an optical network unit;
- a third optical fiber connecting the first passive remote node to the optical network unit;
- a fourth optical fiber connecting the second passive remote node to the optical network unit;
- wherein a first portion of a first fiber-optic cable containing the first optical fiber does not contain any part of the second optical fiber.
A local access network, comprising:
- a switching node;
- an optical network unit;
- a first optical fiber that provides a dedicated connection between the switching node and the optical network unit;
- a second optical fiber that provides a dedicated connection between the switching node and the optical network unit;
- wherein a first portion of a first fiber-optic cable containing the first optical fiber does not contain any part of the second optical fiber.
A local access network, comprising:
- a first switching node;
- a second switching node;
- a passive remote node connected to an optical network unit;
- a first optical fiber that provides a dedicated connection between the first switching node and the passive remote node;
- a second optical fiber that provides a dedicated connection between the second switching node and the passive remote node;
- wherein a first portion of a first fiber-optic cable containing the first optical fiber does not contain any part of the second optical fiber.
A local access network, comprising:
- a first switching node;
- a first passive remote node;
- a first optical fiber connecting the first switching node to the first passive remote node;
- a second switching node;
- a second passive remote node;
- a second optical fiber connecting the second switching node to the second passive remote node;
- an optical network unit;
- a third optical fiber connecting the first passive remote node to the optical network unit;
- a fourth optical fiber connecting the second passive remote node to the optical network unit;
- wherein a first portion of a first fiber-optic cable containing the first optical fiber does not contain any part of the second optical fiber.
A method of providing protection against loss of service in a local access network, comprising the steps of:
- transmitting data between a switching node and a first passive remote node via a first dedicated connection, wherein the first dedicated connection includes a first optical fiber;
- monitoring the first dedicated connection for a failure;
- and
- if a failure is detected, transmitting data between the switching node and the first passive remote node via a second dedicated connection, wherein the second dedicated connection includes a second optical fiber;
- wherein a first portion of a first fiber-optic cable containing the first optical fiber does not contain any part of the second optical fiber.
A method of providing protection against loss of service in a local access network, comprising the steps of:
- transmitting data between a switching node and an optical network unit via a first dedicated connection, wherein the first dedicated connection includes a first optical fiber connecting the switching node to a first passive remote node;
- monitoring the first dedicated connection for a failure;
- and
- if a failure is detected, transmitting data between the switching node and the optical network unit via a second dedicated connection, wherein the second dedicated connection includes a second optical fiber connecting the switching node to a second passive remote node;
- wherein a first portion of a first fiber-optic cable containing the first optical fiber does not contain any part of the second optical fiber.
Dependencies are inferred from the claim text.