Circuit in mixed rate optical communication network
A technology of optical communication network and circuit, which is applied in the field of optical communication, and can solve the problem that the wavelength is not fully utilized.
Inactive Publication Date: 2002-04-17
LUCENT TECH INC
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Problems solved by technology
In this example, the wavelengths allocated to OC3 optical signals or OC12 optical signals are underutilized from the point of view of available data bandwidth
Method used
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[0029] Figure 1 shows a portion of an optical communications network 100 according to one embodiment of the present invention. Specifically, FIG. 1 shows two nodes in network 100 , node 1102 and node 2104 , interconnected by four unidirectional optical fibers 106 , 108 , 110 , and 112 . In general, network 100 may have any number of nodes interconnected in any possible topology. In addition, node 1 and node 2 can be interconnected by another optical fiber.
[0030]For ease of illustration only, node 1 is referred to as an upstream node and node 2 is referred to as a downstream node. Thus, unidirectional fibers 106 and 108 are used to transmit optical signals downstream from node 1 to node 2 , while unidirectional fibers 110 and 112 are used to transmit optical signals upstream from node 2 to node 1 . The communication between node 1 and node 2 is configured as 1+1 fault protection, therefore, it can be (arbitrarily) assumed that fiber 106 is the working downstream fiber, whi...
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Circuitry for a node of an optical communication network (102) has a mux (122) and / or a demux (132). In one embodiment, the circuitry has a mux (122) and a demux (132) implemented on a single circuit board, where (I) the mux (122) is configured to combine up to eight different incoming OC3 / OC12-rate electrical signals (114) into a single outgoing OC48-rate electrical signal for conversion into two copies of an outgoing OC48 optical signal (106,108) and (II) the demux (132) is configured to split a working incoming OC48-rate electrical signal (selected from two incoming OC48-rate electrical signals converted from two incoming OC48 optical signals (110,112)) into up to eight different outgoing OC3 / OC12-rate electrical signals (120). The node is configured to perform automatic signal provisioning, which may be (a) the addition of a new OC3 / OC12 signal; (b) the deletion of an existing OC3 / OC12 signal; (c) the rate-upgrading of an existing OC3 signal to an OC12 signal; or (d) the rate-downgrading of an existing OC12 signal to an OC3 signal. When adding a new OC12 signal or rate-upgrading an existing OC3 signal, the node automatically determines how to move existing OC3 / OC12 signals within the OC48 frame in order to accommodate the new OC12 signal. The node automatically communicates with the other node corresponding to the provisioned signal to automatically initiate corresponding signal provisioning at the other node.
Description
technical field [0001] The present invention relates to optical communication, in particular to a node in an optical communication network supporting optical signal provisioning. Background technique [0002] A typical optical communications network conforming to the Synchronous Optical Network (SONET) standard includes a set of nodes interconnected by optical fiber links. When the optical communication network is based on Dense Wavelength Division Multiplexing (DWDM) technology, each optical fiber can transmit several different optical signals simultaneously, wherein each different optical signal is transmitted at a different wavelength. In general, different optical signals transmitted through a single fiber can have different data rates. For example, some optical signals may be OC3 signals with a data rate of 155 megabits per second (Mb / s), others may be OC12 signals with a data rate of 622 Mb / s, and still others may be OC48 signal at 2.5 gigabits per second (Gb / s). ...
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Patent Timeline
Login to View More IPC IPC(8): H04B10/24H04B10/00H04J3/00H04J3/08H04J3/16H04J14/02
CPCH04J3/085Y10S370/907H04J3/1611H04J14/02
Inventor 罗马·安东斯克卡尔·A·卡罗利刘易斯·K·斯特罗理查德·L·乌基利斯坦利·E·伍德
Owner LUCENT TECH INC