CN101588219A - Optical layer protection method for ROADM in multi-node ROADM ring network - Google Patents
Optical layer protection method for ROADM in multi-node ROADM ring network Download PDFInfo
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- CN101588219A CN101588219A CNA2008100674028A CN200810067402A CN101588219A CN 101588219 A CN101588219 A CN 101588219A CN A2008100674028 A CNA2008100674028 A CN A2008100674028A CN 200810067402 A CN200810067402 A CN 200810067402A CN 101588219 A CN101588219 A CN 101588219A
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Abstract
The invention discloses an optical layer protection method for ROADM in a multi-node ROADM ring network, comprising the following steps: (1), dividing the protection type of a service wavelength, a wavelength and a working path and a protection path of transmission according to the priority level of system service; (2), configuring a detector, an actuator and a controller according to the protection type; and (3), collecting and analyzing the detection information of the detector by the controller, and controlling the actuator to switch according to the protection type and an analysis result. Based on the same device, the invention utilizes the characteristic of wavelength reconstruction of ROADM equipment, the controller can control the actuator to carry out different operation according to the information of the detector, the switching of various protection types is flexibly realized under the precondition that hardware equipment is not replaced, the effect of the fast scheduling of service resources by the optical network is achieved, the cost of service fulfillment is saved, the speed of service fulfillment is enhanced, and the utilization of system resources is optimized.
Description
Technical field
The present invention relates to configurable OADM (ROADM) optical transmission device of the communications field, relate in particular to the optical layer protective method of this equipment.
Background technology
The extensive application on backbone network along with dense wave division multipurpose (DWDM) and image intensifer (OA) technology, the bandwidth and the transmittability of network are greatly improved, a large amount of exploitations of the communication resource make professional demand also expand rapidly, and wherein the explosive growth of data service makes optical transmission system also obtain increasing the application in metropolitan area network.The networking mode of metropolitan area network is made of backbone's ring and access ring generally based on annular, and Optical Add Drop Multiplexer (OADM) equipment is widely applied.
Because the traffic carrying capacity in the metropolitan area network is big, the importance of different business also is not quite similar, and need protect business on the photosphere face.Generally there are three kinds of modes that photosphere is protected: 1+1 Optical Channel Protection, light-channel shared protection, optical multiplexing section share protect.Traditional OADM equipment realizes that these three kinds protections need different hardware equipment.As shown in Figure 1; this figure is the system block diagram of 1+1 Optical Channel Protection; specific descriptions are: have node C need protect to the service wavelength C-A of node A; the C point of transmitting terminal is divided into C-A-W and C-A-P two parts with the 1x2 coupler with transmitting of transmitter TX; two signals arrive receiving terminal A point through the interior ring and the outer shroud of system respectively; select the superior among C-A-W and the C-A-P to receive at A point 1x2 optical switch, give receiver RX.
Along with the requirement of the maturation and the network flexibility of ROADM device, configurable OADM (ROADM) equipment with Wavelength dispatching is commercial.
Patent 200710170353.6 " realizing the configurable OADM apparatus of flexible wavelength scheduling " discloses a kind of ROADM equipment, as shown in Figure 2, this ROADM equipment is by forming with the lower part: A to～X to light preamplifier, A to～X to the coupler of line direction, A to～X to the wavelength selection unit of line direction, A to～X to power amplifier, A to～X to the coupler on following road, wavelength is selected and allocation units, tunable filtering and receiving element, the tunable transmitter TX that sets out on a journey, close and involve allocation units, the wavelength selection unit of setting out on a journey.
The function and the annexation thereof of each part mentioned above are as follows:
A to～X to light preamplifier receive the input signal of respective direction respectively, light signal is amplified, to guarantee straight-through power of this direction and following road received power.
Through A to～X to the light signal that amplifies of light preamplifier input to the line direction coupler of this direction, line direction coupler by this direction is divided into (X+1) part with the form of broadcasting, export to respectively Xia Lu unit, A to～X to the wavelength selection unit of line direction, realize wavelength broadcasting, loop fuction.
A to～X to wavelength selection unit to the signal of coupler output, select wavelength to～X from the wavelength selection unit output signal of setting out on a journey of this direction of the unit of setting out on a journey, A respectively, close export to respectively behind the ripple A to～X to power amplifier, realize the length flexible scheduling feature.
A to～X to power amplifier realize that the amplification of this direction light signal is to guarantee transmission performance.
The Xia Lu unit by A to～X to coupler, wavelength selection and allocation units, tunable filtering and the receiving element RX on following road form.
The annexation of Xia Lu unit is as follows: the coupler of following road broadcasting input signal through the following road of this direction of all directions is divided into N part, N is the integer more than or equal to 2, wherein each part is given one of N wavelength selection and allocation units, select the wavelength any inequality and the distribution of any direction respectively by N wavelength selection and allocation units, selecting down by tunable filtering and receiving element RX again, the road wavelength receives, realize configurable road function down, and can descend the identical wavelength in road, road port all can descend the function of the wavelength signals of any direction under all.
Set out on a journey the unit by the tunable transmitter TX that sets out on a journey, close the wavelength selection unit that involves allocation units, sets out on a journey and form.
The annexation of unit of setting out on a journey is as follows: the tunable wave length transmitter of setting out on a journey is finished the tunable wave length of business access signal, close through N again and involve the ripple that closes that allocation units are finished the signal of setting out on a journey, and signal distributed with the forms of broadcasting, be input to A to～X to the wavelength selection unit of setting out on a journey, carry out the selection of the wavelength of setting out on a journey of respective direction by the wavelength selection unit of setting out on a journey of all directions.Realize that wavelength is configurable and set out on a journey that the wavelength broadcast capability of setting out on a journey, a plurality of identical wavelength can be in the node functions of setting out on a journey, the road port function of wavelength signals of any direction of can setting out on a journey on each.
Above-mentioned ROADM equipment can be achieved as follows function: flexible wavelength scheduling function between different line directions; The configurable road function up and down of wavelength; The broadcast capability of wavelength bearer service; The wavelength loop fuction; The route protection function of wavelength; The set out on a journey light signal of a plurality of identical wavelength of node; The light signal of the identical wavelength in road under the different directions; All are road port wavelength signals of any direction up and down all up and down.Because above-mentioned numerous functions, the present invention will propose a kind of optical layer protective method that realizes three kinds of protection types under the prerequisite of not changing hardware device flexibly based on this ROADM equipment.
Summary of the invention
Technical problem to be solved by this invention provides the optical layer protective method of ROADM in a kind of multinode ROADM looped network.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
The optical layer protective method of ROADM in a kind of multinode ROADM looped network may further comprise the steps:
(1), divides the operating path and the protection path of protection type, wavelength and the transmission of service wavelength according to the priority of system business;
(2) according to protection type configuration relevant detection device, actuator and controller;
(3) controller carries out Collection and analysis to the detection information of detector, and according to protection type and analysis result, the control actuator switches.
Wherein, described ROADM comprise A to～X to light preamplifier, A to～X to line direction coupler, A to～X to line direction wavelength selection unit, A to～X to power amplifier, set out on a journey unit and Xia Lu unit;
Described A to～X to light preamplifier receive the input signal of respective direction respectively, light signal is amplified, then this signal is sent to the coupler of the line direction of respective direction, be divided into (X+1) part by its form with broadcasting, export to respectively Xia Lu unit, A to～X to the wavelength selection unit of line direction; Described A to～X to the wavelength selection unit of line direction in order to the signal of coupler output, to select wavelength to～X from the wavelength selection unit output signal of setting out on a journey of the respective direction of the unit of setting out on a journey, A, close export to respectively behind the ripple A to～X to power amplifier carry out luminous power and amplify;
Described Xia Lu unit comprise again A to～X to coupler, at least one wavelength selection and allocation units, tunable filtering and the receiving element RX on following road; Described A to～X to the coupler on following road send to wavelength respectively after the following road broadcasting input signal of received all directions is divided into two parts at least and select and allocation units, select the different wave length of any direction respectively and distribute road wavelength reception under selecting by tunable filtering and receiving element RX again by it;
The described unit of setting out on a journey comprise again the tunable transmitter TX that sets out on a journey, at least one close involve allocation units, A to～X to the wavelength selection unit of setting out on a journey; The described tunable transmitter TX that sets out on a journey carries out sending to close behind the tunable wave length involving allocation units to business access signal, by the closing ripple and signal distributed with the forms of broadcasting of its signal of setting out on a journey, transfer to again A to～X to the wavelength selection unit of setting out on a journey carry out the selection of the wavelength of setting out on a journey of respective direction.
Wherein, the protection type in the described step (1) comprises three kinds of 1+1 Optical Channel Protection, light-channel shared protection, optical multiplexing section share protect.
Wherein, in the described step (2), actuator is the wavelength selection unit of the Xia Lu unit of the wavelength selection unit of each line direction and service wavelength transmission terminal node, for 1+1 Optical Channel Protection type and light-channel shared protection type, detector is the device of each input wavelength channel performance of the wavelength selection unit of detection Xia Lu unit; For optical multiplexing section share protect type, detector is the device of the detection line input optical power of each node.
Wherein, in the described step (3), for 1+1 Optical Channel Protection type, controller at first carries out following setting to actuator, makes service wavelength be transferred to destination node by operating path and protection path simultaneously, and the transmission path of service wavelength is set up 1+1 backup:
The wavelength selection unit that 1. line direction of each node is set is blocked each wavelength of this direction input, or does not connect the corresponding input port of each wavelength of this direction;
2. the wavelength selection unit of the line direction of service wavelength transmission sources node is carried out following setting: the wavelength selection unit of line direction that the wavelength selection unit of line direction of service wavelength operating path institute warp and service wavelength protection path institute warp are set is straight-through to the wavelength of setting out on a journey;
3. the wavelength selection unit of the line direction of the intermediate node of service wavelength operating path transmission institute warp is carried out following setting: it is straight-through to this service wavelength of line direction input that this wavelength selection unit is set;
4. the wavelength selection unit of the line direction of the intermediate node of service wavelength protection path transmission institute warp is carried out following setting: it is straight-through to this service wavelength of line direction input that this wavelength selection unit is set.
Wherein, in the described step (3), for 1+1 Optical Channel Protection type,
When system's fault-free, controller further carries out following setting to actuator, make the service wavelength of system's selective reception through operating path transmission: the wavelength selection unit of Xia Lu unit that service wavelength transmission destination node is set is to straight-through through the wavelength of operating path transmission, to the wavelength blocking-up through the transmission of protection path;
There is fault to cause detector to detect when the wavelength of operating path transmission is unusual in system; controller further carries out following setting to actuator; make system's selective reception through protecting the service wavelength of path transmission: the wavelength selection unit that the Xia Lu unit of service wavelength transmission destination node is set leads directly to the wavelength through the transmission of protection path, to the wavelength blocking-up through the operating path transmission.
Wherein, in the described step (3), for the light-channel shared protection type, the wavelength selection unit that the line direction of each node at first is set is blocked each wavelength of this direction input, or does not connect the corresponding input port of each wavelength of this direction.
Wherein, in the described step (3), for the light-channel shared protection type,
When system's fault-free, controller further carries out following setting to actuator, makes service wavelength only send to operating path, does not send to the protection path:
I, the wavelength selection unit of the line direction of service wavelength transmission sources node is carried out following setting: the wavelength selection unit of line direction that service wavelength operating path institute warp is set is straight-through to this wavelength of setting out on a journey, wavelength selection unit this wavelength blocking-up to setting out on a journey of the line direction of service wavelength protection path institute warp;
II, the wavelength selection unit of the line direction of the intermediate node of service wavelength operating path transmission institute warp is carried out following setting: it is straight-through to this service wavelength of line direction input that this wavelength selection unit is set;
III, the wavelength selection unit of the line direction of the intermediate node of service wavelength protection path transmission institute warp is carried out following setting: this service wavelength blocking-up to the line direction input of this wavelength selection unit is set;
IV, the wavelength selection unit of Xia Lu unit of service wavelength transmission destination node is set to straight-through, to wavelength blocking-up through the transmission of protection path through the wavelength of operating path transmission.
There is fault to cause detector to detect when the wavelength of operating path transmission is unusual in system; controller further carries out following setting to actuator; make service wavelength send to operating path and protection path simultaneously, and selective reception is through protecting the wavelength of path transmission:
I, the wavelength selection unit of the line direction of service wavelength transmission sources node is carried out following setting: the wavelength selection unit of line direction that service wavelength operating path institute warp is set is straight-through to this wavelength of setting out on a journey, the wavelength selection unit of the line direction of service wavelength protection path institute warp is straight-through to this wavelength of setting out on a journey;
Ii, the wavelength selection unit of the line direction of the intermediate node of service wavelength operating path transmission institute warp is carried out following setting: it is straight-through to this service wavelength of line direction input that this wavelength selection unit is set;
Iii, the wavelength selection unit of the line direction of the intermediate node of service wavelength protection path transmission institute warp is carried out following setting: it is straight-through to this service wavelength of line direction input that this wavelength selection unit is set;
Iv, the wavelength selection unit of Xia Lu unit of service wavelength transmission destination node is set to straight-through, to wavelength blocking-up through the operating path transmission through the wavelength of protection path transmission.
Wherein, in the described step (3), for optical multiplexing section share protect type, the wavelength selection unit that the line direction of each node at first is set connects the corresponding input port of each wavelength of this direction.
Wherein, in the described step (3), for optical multiplexing section share protect type,
When system's fault-free, controller further carries out following setting to actuator, makes service wavelength only send to operating path, does not send to the protection path, and selective reception is through the wavelength of operating path transmission:
(1) each the wavelength blocking-up to the input of this direction of the wavelength selection unit of line direction is set;
(2) wavelength selection unit of the line direction of service wavelength transmission sources node is carried out following setting: the wavelength selection unit of line direction that service wavelength operating path institute warp is set is straight-through to this wavelength of setting out on a journey, wavelength selection unit this wavelength blocking-up to setting out on a journey of the line direction of service wavelength protection path institute warp;
(3) wavelength selection unit of the line direction of the intermediate node of service wavelength operating path transmission institute warp is carried out following setting: it is straight-through to this service wavelength of line direction input that this wavelength selection unit is set;
(4) wavelength selection unit of the line direction of the intermediate node of service wavelength protection path transmission institute warp is carried out following setting: the straight-through or blocking-up to this service wavelength of line direction input of this wavelength selection unit is set; Wherein, have at least a node to be set to blocking-up;
(5) wavelength selection unit of Xia Lu unit of service wavelength transmission destination node is set to straight-through, to wavelength blocking-up through the transmission of protection path through the wavelength of operating path transmission.
Wherein, in the described step (3),, there is fault to cause detector to detect when the wavelength of operating path transmission is unusual in system for optical multiplexing section share protect type,
For the adjacent node of fault, controller further carries out following setting to actuator:
A, the wavelength selection unit of line direction that contiguous fault is set are straight-through to the wavelength of setting out on a journey of this node operating path, respectively to through the wavelength blocking-up of this direction of operating path and the input of Fei Ben direction and straight-through;
B, non-contiguous fault is set the wavelength selection unit of line direction to each wavelength blocking-up with fault side input, to the input of this direction not under this node the service wavelength on road straight-through;
C, the wavelength selection unit that the Xia Lu unit is set select wavelength to receive from the signal of the non-fault side input on road that this node descends;
For the nonneighbor node of fault, carry out following setting:
A, line direction is set wavelength selection unit to each wavelength blocking-up of this direction input;
This wavelength that b, the wavelength selection unit that the line direction of service wavelength operating path institute warp is set select this wavelength set out on a journey to set out on a journey by the wavelength selection unit blocking-up of the line direction of, service wavelength protection path institute warp;
C, line direction is set wavelength selection unit to straight-through through the wavelength of operating path transmission, straight-through to the wavelength that is subjected to fault effects through the transmission of protection path, for be not subjected to fault effects through the wavelength blocking-up of protection path transmission or straight-through;
The wavelength selection unit blocking-up of this wavelength that d, the wavelength selection unit that the line direction of service wavelength operating path institute warp is set are selected road down by the line direction of, service wavelength protection path institute warp be this wavelength on road down.
The present invention has following beneficial effect:
The present invention is based on same device; utilize the wavelength reconstruct characteristics of ROADM equipment; controller can carry out different operating according to the information Control actuator of detector; under the prerequisite of not changing hardware device; realized the switching of kinds of protect type flexibly, reached and satisfied the effect of optical-fiber network, saved the cost of service fulfillment the service resources fast dispatch; improved the speed of service fulfillment, made the system resource utilization optimization.
Description of drawings
Fig. 1 is the system block diagram of 1+1 Optical Channel Protection in the prior art;
Fig. 2 is a structured flowchart of realizing the ROADM node apparatus of many light directions;
Fig. 3 is an optical layer protective method flow diagram of the present invention;
Fig. 4 is the structured flowchart of two light direction ROADM node apparatus;
Fig. 5 is four nodes, two light direction ROADM looped network schematic diagrames;
Fig. 6 is the Wavelength Assignment form of 1+1 Optical Channel Protection in the embodiment of the invention;
Fig. 7 is the Wavelength Assignment form of light-channel shared protection in the embodiment of the invention;
Fig. 8 is the Wavelength Assignment form of optical multiplexing section share protect in the embodiment of the invention.
Embodiment
Fig. 3 is a realization block diagram of the present invention, and the optical layer protective method of ROADM equipment may further comprise the steps:
The first step according to the priority of system business, is divided the operating path and the protection path of protection type, wavelength and the transmission of service wavelength;
Second step is according to protection type, configuration detector, actuator and controller;
In the 3rd step, controller is according to protection type and system mode, and the control actuator switches.
The present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments:
Fig. 4 is based on the structured flowchart of the two light direction ROADM node apparatus of ROADM shown in Figure 2, this ROADM by A to light preamplifier OPA_A, coupler _ A to, wavelength selection unit _ A to, power amplifier OBA_A to, B to light preamplifier OPA_B, coupler _ B to, wavelength selection unit _ B to, power amplifier OBA_B to, the wavelength selection unit of Xia Lu unit _ following road, OA1, Wavelength Assignment unit, receiver RX, close ripple unit, allocation units, OA2 and form the transmitter TX of the unit of setting out on a journey.
Operation principle is: A to B to the circuit input optical signal amplify by this direction light preamplifier after, export to the coupler of this direction, be divided into three parts by coupler with the form of broadcasting, export to respectively wavelength selection unit _ following road, wavelength selection unit _ A to, wavelength selection unit _ B to.Enter the light signal on wavelength selection unit _ following road, following road wavelength is selected, and after OA1 amplifies, by the Wavelength Assignment unit it is assigned to receiving element RX.The optical signals transmitter TX that is set out on a journey by this node enters and sets out on a journey, after ECDC ripple unit closes ripple and OA2 and amplifies, through allocation units, with the light signal of a plurality of wavelength be assigned to wavelength selection unit _ A to, wavelength selection unit B to.A to B to wavelength selection unit from the allocation units output signal of setting out on a journey, coupler _ A to, coupler _ B to output signal, export to the power amplifier of this direction after selecting wavelength and closing ripple, carry out power amplification, so that transmit.
Fig. 5 is four nodes, two light direction ROADM looped network schematic diagrames, and wherein each node is configured by Fig. 4, constitutes two fibre bidirectional loop networks.X among the figure between Node B and the node C represents this section fiber break.
Fig. 6 is the Wavelength Assignment form of 1+1 Optical Channel Protection, is the method that the 1+1 Optical Channel Protection is carried out in the example introduction with this figure below.The first step, configuration protection type and wavelength, Fig. 6 have three pairs of wavelength business, and be as follows:
Wavelength 2 is a pair of business between node A and node C, and the path of outer shroud operation wavelength 2 is node C → Node B → node A, and the wavelength 2 of interior ring footpath node C → node D → node A is on foot protected the operation wavelength 2 of outer shroud; The path of interior ring operation wavelength 2 is node A → Node B → node C, and the wavelength 2 of outer shroud footpath node A → node D → node C is on foot protected the operation wavelength 2 of interior ring.
Wavelength 3 is a pair of business between node C and node D, and the path of outer shroud operation wavelength 3 is node D → node C, and the wavelength 3 of interior ring footpath node D → node A → Node B → node C is on foot protected the operation wavelength 3 of outer shroud; The path of interior ring operation wavelength 3 is node C → node D, and the wavelength 3 of outer shroud footpath node C → Node B → node A → node D is on foot protected the operation wavelength 3 of interior ring.
In second step, the wavelength selection unit of the wavelength selection unit of configuration node B _ following road, node C _ following road is the detector of wavelength 1.The wavelength selection unit of the wavelength selection unit of node A _ following road, node C _ following road is the detector of wavelength 2.The wavelength selection unit of the wavelength selection unit of node C _ following road, node D _ following road is the detector of wavelength 3.
In addition, wavelength 1 also need use following actuator: the wavelength selection unit of the wavelength selection unit of Node B _ following road, node C _ following road.
Wavelength 2 also need use following actuator: the wavelength selection unit of the wavelength selection unit of node C _ following road, node A _ following road.
Wavelength 3 also need use following actuator: the wavelength selection unit of the wavelength selection unit of node C _ following road, node D _ following road.
Controller is the veneer with control plane function of system, is responsible for collecting the detection information of detector, analyzes, and the control actuator switches.
The luminous power of its each wavelength of input port can be detected in wavelength selection unit _ following road.
In the 3rd step, wavelength selection unit _ A of controller Control Node A, B, C, D is to blocking A each wavelength to input respectively, and wavelength selection unit _ B of node A, B, C, D is to blocking B each wavelength to input respectively.Or the wavelength selection unit _ A of each node to wavelength selection unit B to the optical fiber that is not connected the input of this direction.
Wavelength selection unit _ A that node A is set is straight-through to the wavelength 2 of setting out on a journey, and B is straight-through to the wavelength 1 and the wavelength 3 of input.
Wavelength selection unit _ B of node A to the wavelength of setting out on a journey 2 straight-through, A is straight-through to the wavelength 1 and the wavelength 3 of input.
Wavelength selection unit _ the A of Node B to the wavelength of setting out on a journey 1 straight-through, B is straight-through to the wavelength 2 and the wavelength 3 of input.
Wavelength selection unit _ the B of Node B to the wavelength of setting out on a journey 1 straight-through, A is straight-through to the wavelength 2 and the wavelength 3 of input.
Wavelength selection unit _ A of node C to the wavelength of setting out on a journey 1, wavelength 2 and wavelength 3 straight-through.
Wavelength selection unit _ B of node C to the wavelength of setting out on a journey 1, wavelength 2 and wavelength 3 straight-through.
Wavelength selection unit _ A of node D is straight-through to the wavelength 3 of setting out on a journey, and B is straight-through to the wavelength 1 and the wavelength 2 of input.
Wavelength selection unit _ B of node D is straight-through to the wavelength 3 of setting out on a journey, and A is straight-through to the wavelength 1 and the wavelength 2 of input.
By above setting, provide the protection path and the operating path of 1+1 backup transmission for wavelength 1, wavelength 2 and wavelength 3.
In the 3rd step, in system just often, the B on the wavelength selection unit of Control Node A _ following road to wavelength 2 straight-through, A to wavelength 2 blocking-up.
The B on the wavelength selection unit of Node B _ following road to wavelength 1 straight-through, A to wavelength 1 blocking-up.
The B on the wavelength selection unit of node C _ following road to wavelength 3, A to wavelength 1 and wavelength 2 straight-through, A to wavelength 3, B to wavelength 1 and wavelength 2 blocking-up.
The A on the wavelength selection unit of node D _ following road to wavelength 3 straight-through, B to wavelength 3 blocking-up.
By above setting, wavelength 1, wavelength 2 and wavelength 3 are all selected to receive through the wavelength of operating path transmission.
For avoiding the looped network self-excitation, for untapped wavelength in the system, each wavelength selection unit all is set to blocking-up.
In the 3rd step, during fiber break between system node C and Node B, wavelength 1 and wavelength 2 are influenced, and wavelength 3 is uninfluenced.
The wavelength selection unit of node A _ following road detect B to wavelength 2 performance degradations.
The wavelength selection unit of Node B _ following road detect B to wavelength 1 performance degradation.
The wavelength selection unit of node C _ following road detect A to wavelength 1 and wavelength 2 performance degradations.
The B on the wavelength selection unit of Control Node A _ following road to wavelength 2 blocking-up, A to wavelength 2 straight-through.
The B on the wavelength selection unit of Node B _ following road to wavelength 1 blocking-up, A to wavelength 1 straight-through.
The B on the wavelength selection unit of node C _ following road to wavelength 3, B to wavelength 1 and wavelength 2 straight-through, A to wavelength 3, A to wavelength 1 and wavelength 2 blocking-up.
The A on the wavelength selection unit of node D _ following road to wavelength 3 straight-through, B to wavelength 3 blocking-up.
By above setting; the wavelength 1 of Node B → node C is selected to receive through the wavelength of protection path (Node B → node A → node D → node C) transmission; the wavelength 1 of node C → Node B is selected to receive through the wavelength of protection path (node C → node D → node A → Node B) transmission; the wavelength 2 of node A → node C is selected to receive through the wavelength of protection path (node A → node D → node C) transmission; the wavelength 2 of node C → node A is selected to receive through the wavelength of protection path (node C → node D → node A) transmission, realizes defencive function.Wavelength 3 is also selected to receive through the wavelength of operating path transmission.
For avoiding the looped network self-excitation, for untapped wavelength in the system, each wavelength selection unit all is set to blocking-up.
Fig. 7 is the Wavelength Assignment form of light-channel shared protection, is the method that light-channel shared protection is carried out in the example introduction with this figure below.The first step, configuration protection type and wavelength, the wavelength business of Fig. 7 is as follows:
Interior link point B → node C has wavelength 1, and node C → node A has wavelength 1, and the wavelength 1 of outer shroud provides share protect for the wavelength 1 of interior ring.
Outer shroud node C → Node B has wavelength 2, and node A → node C has wavelength 2, and the wavelength 2 of interior ring provides share protect for the wavelength 2 of outer shroud.
Interior link point A → Node B has wavelength 3, and node C → node D has wavelength 3, and the wavelength 3 of outer shroud provides share protect for the wavelength 3 of interior ring.
Outer shroud Node B → node A has wavelength 4, and node D → node C has wavelength 4, and the wavelength 4 of interior ring provides share protect for the wavelength 4 of outer shroud.
In second step, the wavelength selection unit of configuration node A _ following road is the detector of wavelength 4 of wavelength 1, the Node B → node A of node C → node A.
The wavelength selection unit of Node B _ following road is the detector of wavelength 3 of wavelength 2, the node A → Node B of node C → Node B.
The wavelength selection unit of node C _ following road is the detector of wavelength 4 of wavelength 1, the node D → node C of Node B → node C.
The wavelength selection unit of node D _ following road is the detector of the wavelength 3 of node C → node D.
In addition, the wavelength 1 of Node B → node C also need use actuator: the wavelength selection unit of node C _ following road.
The wavelength 1 of node C → node A also need use actuator: the wavelength selection unit of node A _ following road.
The wavelength 2 of node C → Node B also need use actuator: the wavelength selection unit of Node B _ following road.
The wavelength 2 of node A → node C also need use actuator: the wavelength selection unit of node C _ following road.
The wavelength 3 of node A → Node B also need use actuator: the wavelength selection unit of Node B _ following road.
The wavelength 3 of node C → node D also need use actuator: the wavelength selection unit of node D _ following road.
The wavelength 4 of Node B → node A also need use actuator: the wavelength selection unit of node A _ following road.
The wavelength 4 of node D → node C also need use actuator: the wavelength selection unit of node C _ following road.
Controller is the veneer with control plane function of system, is responsible for collecting the detection information of detector, analyzes, and the control actuator switches.
The luminous power of its each wavelength of input port can be detected in wavelength selection unit _ following road.
In the 3rd step, wavelength selection unit _ A of controller Control Node A, B, C, D is to blocking A each wavelength to input respectively, and wavelength selection unit _ B of node A, B, C, D is to blocking B each wavelength to input respectively.Or the wavelength selection unit _ A of each node to wavelength selection unit _ B to the optical fiber that is not connected this direction input.
In the 3rd step, in system just often, wavelength selection unit _ A of controller Control Node A to 3 blocking-up of the wavelength of setting out on a journey 2 wavelength that leads directly to, set out on a journey, B to wavelength 1 and wavelength 3 blocking-up.
Wavelength selection unit _ B of node A to 4 blocking-up of the wavelength of setting out on a journey 3 wavelength that leads directly to, set out on a journey, A to wavelength 2 and wavelength 4 blocking-up.
Wavelength selection unit _ the A of Node B to 1 blocking-up of the wavelength of setting out on a journey 4 wavelength that leads directly to, set out on a journey, B to wavelength 1 and wavelength 3 blocking-up.
Wavelength selection unit _ the B of Node B to 4 blocking-up of the wavelength of setting out on a journey 1 wavelength that leads directly to, set out on a journey, A to wavelength 2 and wavelength 4 blocking-up.
Wavelength selection unit _ A of node C to the wavelength of setting out on a journey 2 wavelength 1 that leads directly to, set out on a journey and wavelength 3 blocking-up, B to wavelength 1 and wavelength 3 blocking-up.
Wavelength selection unit _ B of node C to wavelength of setting out on a journey 1 and 2 blocking-up of wavelength 3 wavelength that leads directly to, set out on a journey, A to wavelength 2 and wavelength 4 blocking-up.
Wavelength selection unit _ A of node D to the wavelength of setting out on a journey 4 straight-through, B to wavelength 1 and wavelength 3 blocking-up.
Wavelength selection unit _ B of node D to the wavelength of setting out on a journey 4 blocking-up, A to wavelength 2 and wavelength 4 blocking-up.
The wavelength selection unit of node A _ following road with A to wavelength 1 straight-through, B to wavelength 4 straight-through, B to wavelength 1 blocking-up, A to wavelength 4 blocking-up.
The wavelength selection unit of Node B _ following road with A to wavelength 3 straight-through, B to wavelength 2 straight-through, B to wavelength 3 blocking-up, A to wavelength 2 blocking-up.
The wavelength selection unit of node C _ following road with A to wavelength 1 straight-through, B to wavelength 2 and wavelength 4 straight-through, B to wavelength 1 blocking-up, A to wavelength 2 and wavelength 4 blocking-up.
The wavelength selection unit of node D _ following road with A to wavelength 3 straight-through, B to wavelength 3 blocking-up.
Through above setting, wavelength 1, wavelength 2, wavelength 3 and wavelength 4 are all selected to receive through the wavelength of operating path transmission.
For avoiding the looped network self-excitation, for untapped wavelength in the system, each wavelength selection unit all is set to blocking-up.
In the 3rd step, during fiber break between system node C and Node B, the wavelength selection unit of detector Node B _ following road detect B to wavelength 2 performance degradations.
The wavelength selection unit of node C _ following road detect A to wavelength 1 performance degradation.Other business is uninfluenced.
Wavelength selection unit _ A of controller Control Node A to 3 blocking-up of the wavelength of setting out on a journey 2 wavelength that leads directly to, set out on a journey, B to wavelength 3 blocking-up, wavelength 1 straight-through.
Wavelength selection unit _ B of node A to 4 blocking-up of the wavelength of setting out on a journey 3 wavelength that leads directly to, set out on a journey, A to wavelength 4 blocking-up, wavelength 2 straight-through.
Wavelength selection unit _ the A of Node B to the wavelength of setting out on a journey 4 wavelength that leads directly to, set out on a journey 1 straight-through, B to wavelength 1 and wavelength 3 blocking-up.
Wavelength selection unit _ the B of Node B to 4 blocking-up of the wavelength of setting out on a journey 1 wavelength that leads directly to, set out on a journey, A to wavelength 2 and wavelength 4 blocking-up.
Wavelength selection unit _ A of node C to the wavelength of setting out on a journey 2 wavelength 1 that leads directly to, set out on a journey and wavelength 3 blocking-up, B to wavelength 1 and wavelength 3 blocking-up.
Wavelength selection unit _ B of node C to wavelength of setting out on a journey 1 and wavelength 3 wavelength that leads directly to, set out on a journey 2 straight-through, A to wavelength 2 and wavelength 4 blocking-up.
Wavelength selection unit _ A of node D to the wavelength of setting out on a journey 4 straight-through, B to wavelength 3 blocking-up, wavelength 1 straight-through.
Wavelength selection unit _ B of node D to the wavelength of setting out on a journey 4 blocking-up, A to wavelength 4 blocking-up, wavelength 2 straight-through.
The wavelength selection unit of node A _ following road with A to wavelength 1 straight-through, B to wavelength 4 straight-through, B to wavelength 1 blocking-up, A to wavelength 4 blocking-up.
The wavelength selection unit of Node B _ following road with A to wavelength 3 straight-through, B to wavelength 2 blocking-up, B to wavelength 3 blocking-up, A to wavelength 2 straight-through.
The wavelength selection unit of node C _ following road with A to wavelength 1 blocking-up, B to wavelength 2 and wavelength 4 straight-through, B to wavelength 1 straight-through, A to wavelength 2 and wavelength 4 blocking-up.
The wavelength selection unit of node D _ following road with A to wavelength 3 straight-through, B to wavelength 3 blocking-up.
Through above setting; the wavelength 1 of Node B → node C is selected to receive through the wavelength of protection path (Node B → node A → node D → node C) transmission; the wavelength 2 of node C → Node B is selected to receive through the wavelength of protection path (node C → node D → node A → Node B) transmission, realizes defencive function.Other wavelength 1, wavelength 2, wavelength 3 and wavelength 4 are also all selected to receive through the wavelength of operating path transmission.
For avoiding the looped network self-excitation, for untapped wavelength in the system, each wavelength selection unit all is set to blocking-up.
Fig. 8 is the Wavelength Assignment form of optical multiplexing section share protect, is the method that the optical multiplexing section share protect is carried out in the example introduction with this figure below.The first step, configuration protection type and wavelength, the wavelength business of Fig. 8 is as follows:
Interior link point A → node C has wavelength 1, and node C → node D has wavelength 1, and the wavelength 1 of outer shroud provides share protect for the wavelength 1 of interior ring.
Outer shroud node C → node A has wavelength 2, and node D → node C has wavelength 2, and the wavelength 2 of interior ring provides share protect for the wavelength 2 of outer shroud.
Interior link point A → Node B has wavelength 3, and node C → node D has wavelength 3, and the wavelength 3 of outer shroud provides share protect for the wavelength 3 of interior ring.
Outer shroud Node B → node A has wavelength 4, and node D → node C has wavelength 4, and the wavelength 4 of interior ring provides share protect for the wavelength 4 of outer shroud.
In second step, the OPA of all directions of configuration node A, B, C, D is a detector.
In addition, the wavelength 1 of node A → node C also need use actuator: the wavelength selection unit of node C _ following road.
The wavelength 1 of node C → node D also need use actuator: road under the wavelength selection unit of node D.
The wavelength 2 of node C → node A also need use actuator: the wavelength selection unit of node A _ following road.
The wavelength 2 of node D → node C also need use actuator: the wavelength selection unit of node C _ following road.
The wavelength 3 of node A → Node B also need use actuator: the wavelength selection unit of Node B _ following road.
The wavelength 3 of node C → node D also need use actuator: the wavelength selection unit of node D _ following road.
The wavelength 4 of Node B → node A also need use actuator: the wavelength selection unit of node A _ following road.
The wavelength 4 of node D → node C also need use actuator: the wavelength selection unit of node C _ following road.
Controller is the veneer with control plane function of system, is responsible for collecting the detection information of detector, analyzes, and the control actuator switches.
The 3rd step, wavelength selection unit _ A of node A, B, C, D to wavelength selection unit _ B to the optical fiber that all is connected this direction input.
In the 3rd step, in system just often, wavelength selection unit _ A of controller Control Node A to wavelength of setting out on a journey 1 and wavelength 3 blocking-up, B to wavelength 1 and wavelength 3 blocking-up, A to each wavelength blocking-up.
Wavelength selection unit _ B of node A to wavelength of setting out on a journey 1 and wavelength 3 straight-through, A to wavelength 2 and wavelength 4 blocking-up, B to each wavelength blocking-up.
Wavelength selection unit _ the A of Node B to B to wavelength 1 and wavelength 3 blocking-up, A to each wavelength blocking-up.
Wavelength selection unit _ the B of Node B to A to straight-through, wavelength 2 of wavelength 1 and wavelength 4 blocking-up, B to each wavelength blocking-up.
Wavelength selection unit _ A of node C to the wavelength of setting out on a journey 2 wavelength 1 that leads directly to, set out on a journey and wavelength 3 blocking-up, B to wavelength 1 and wavelength 3 blocking-up, A to each wavelength blocking-up.
Wavelength selection unit _ B of node C to wavelength of setting out on a journey 1 and 2 blocking-up of wavelength 3 wavelength that leads directly to, set out on a journey, A to wavelength 2 and wavelength 4 blocking-up, B to each wavelength blocking-up.
Wavelength selection unit _ A of node D to wavelength of setting out on a journey 2 and wavelength 4 straight-through, B to wavelength 1 and wavelength 3 blocking-up.
Wavelength selection unit _ B of node D to wavelength of setting out on a journey 2 and wavelength 4 blocking-up, A to wavelength 2 and wavelength 4 blocking-up.
The wavelength selection unit of node A _ following road with B to wavelength 4 and wavelength 2 straight-through, A to wavelength 4 and wavelength 2 blocking-up.
The wavelength selection unit of Node B _ following road with A to wavelength 3 straight-through, B to wavelength 3 blocking-up.
The wavelength selection unit of node C _ following road with A to wavelength 1 straight-through, B to wavelength 2 and wavelength 4 straight-through, B to wavelength 1 blocking-up, A to wavelength 2 and wavelength 4 blocking-up.
The wavelength selection unit of node D _ following road with A to wavelength 1 and wavelength 3 straight-through, B to wavelength 1 and wavelength 3 blocking-up.
Through above setting, wavelength 1, wavelength 2, wavelength 3 and wavelength 4 are all selected to receive through the wavelength of operating path transmission.
For avoiding the looped network self-excitation, for untapped wavelength in the system, each wavelength selection unit all is set to blocking-up.
In the 3rd step, during fiber break between system node C and Node B, the OPA of detector node C and B detects the optical property deterioration.Wavelength 2 service disconnection of the wavelength 1 of node A → node C, node C → node A.
Wavelength selection unit _ A of controller Control Node A to wavelength of setting out on a journey 1 and wavelength 3 blocking-up, B to wavelength 1 straight-through, wavelength 3 blocking-up, A to each wavelength blocking-up.
Wavelength selection unit _ B of node A to wavelength of setting out on a journey 1 and wavelength 3 straight-through, A to wavelength 2 straight-through, wavelength 4 blocking-up, B to each wavelength blocking-up.
Wavelength selection unit _ the A of Node B to A to wavelength 1 and wavelength 2 straight-through, B to wavelength 1 and wavelength 3 blocking-up.
Wavelength selection unit _ the B of Node B to A to wavelength 1 straight-through, wavelength 2 and wavelength 4 blocking-up, B to each wavelength blocking-up.
Wavelength selection unit _ A of node C to the wavelength of setting out on a journey 2 wavelength 1 that leads directly to, set out on a journey and wavelength 3 blocking-up, B to wavelength 1 and wavelength 3 blocking-up, A to each wavelength blocking-up.
Wavelength selection unit _ B of node C to wavelength of setting out on a journey 1 and wavelength 3 wavelength that leads directly to, set out on a journey 2 straight-through, A to wavelength 2 and wavelength 4 blocking-up, B to each wavelength blocking-up.
Wavelength selection unit _ A of node D to wavelength of setting out on a journey 2 and wavelength 4 straight-through, B to wavelength 1 straight-through, wavelength 3 blocking-up.
Wavelength selection unit _ B of node D to wavelength of setting out on a journey 2 and wavelength 4 blocking-up, A to wavelength 2 straight-through, wavelength 4 blocking-up.
The wavelength selection unit of node A _ following road with B to wavelength 2 and wavelength 4 straight-through, A to wavelength 2 straight-through and wavelength 4 blocking-up.
The wavelength selection unit of Node B _ following road with A to wavelength 3 straight-through, B to wavelength 3 blocking-up.
The wavelength selection unit of node C _ following road with A to wavelength 1, wavelength 2 and wavelength 4 blocking-up, B to wavelength 1, wavelength 2 and wavelength 4 straight-through.
The wavelength selection unit of node D _ following road with A to wavelength 1 and wavelength 3 straight-through, B to wavelength 1 and wavelength 3 blocking-up.
Through above setting; the wavelength 1 of node A → node C is selected to receive through the wavelength of protection path (node A → Node B → node A → node D → node C) transmission; the wavelength 2 of node C → node A is selected to receive through the wavelength of protection path (node C → node D → node A → Node B → node A) transmission, realizes defencive function.Wavelength 1, wavelength 2, wavelength 3 and wavelength 4 are all selected to receive through the wavelength of operating path transmission.Other wavelength 1, wavelength 2, wavelength 3 and wavelength 4 are all selected to receive through the wavelength of operating path transmission.
For avoiding the looped network self-excitation, for untapped wavelength in the system, each wavelength selection unit all is set to blocking-up.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1, the optical layer protective method of ROADM in a kind of multinode ROADM looped network is characterized in that, may further comprise the steps:
(1), divides the operating path and the protection path of protection type, wavelength and the transmission of service wavelength according to the priority of system business;
(2) according to protection type configuration detector, actuator and controller;
(3) controller carries out Collection and analysis to the detection information of detector, and according to protection type and analysis result, the control actuator switches.
2, the optical layer protective method of ROADM in the multinode ROADM looped network as claimed in claim 1, it is characterized in that, described ROADM comprise A to～X to light preamplifier, A to～X to line direction coupler, A to～X to line direction wavelength selection unit, A to～X to power amplifier, set out on a journey unit and Xia Lu unit;
Described A to～X to light preamplifier receive the input signal of respective direction respectively, light signal is amplified, then this signal is sent to the coupler of the line direction of respective direction, be divided into (X+1) part by its form with broadcasting, export to respectively Xia Lu unit, A to～X to the wavelength selection unit of line direction; Described A to～X to the wavelength selection unit of line direction in order to the signal of coupler output, to select wavelength to～X from the wavelength selection unit output signal of setting out on a journey of the respective direction of the unit of setting out on a journey, A, close export to respectively behind the ripple A to～X to power amplifier carry out luminous power and amplify;
Described Xia Lu unit comprise again A to～X to coupler, at least one wavelength selection and allocation units, tunable filtering and the receiving element RX on following road; Described A to～X to the coupler on following road send to wavelength respectively after the following road broadcasting input signal of received all directions is divided into two parts at least and select and allocation units, select the different wave length of any direction respectively and distribute road wavelength reception under selecting by tunable filtering and receiving element RX again by it;
The described unit of setting out on a journey comprise again the tunable transmitter TX that sets out on a journey, at least one close involve allocation units, A to～X to the wavelength selection unit of setting out on a journey; The described tunable transmitter TX that sets out on a journey carries out sending to close behind the tunable wave length involving allocation units to business access signal, by the closing ripple and signal distributed with the forms of broadcasting of its signal of setting out on a journey, transfer to again A to～X to the wavelength selection unit of setting out on a journey carry out the selection of the wavelength of setting out on a journey of respective direction.
3, the optical layer protective method of ROADM in the multinode ROADM looped network as claimed in claim 2 is characterized in that, the protection type in the described step (1) comprises three kinds of 1+1 Optical Channel Protection, light-channel shared protection, optical multiplexing section share protect.
4, the optical layer protective method of ROADM in the multinode ROADM looped network as claimed in claim 3, it is characterized in that, in the described step (2), actuator is the wavelength selection unit of the Xia Lu unit of the wavelength selection unit of each line direction and service wavelength transmission terminal node, for 1+1 Optical Channel Protection type and light-channel shared protection type, detector is the device of each input wavelength channel performance of the wavelength selection unit of detection Xia Lu unit; For optical multiplexing section share protect type, detector is the device of the detection line input optical power of each node.
5, the optical layer protective method of ROADM in the multinode ROADM looped network as claimed in claim 4; it is characterized in that; in the described step (3); for 1+1 Optical Channel Protection type; controller at first carries out following setting to actuator; make service wavelength be transferred to destination node by operating path and protection path simultaneously, the transmission path of service wavelength set up 1+1 backup:
The wavelength selection unit that 1. line direction of each node is set is blocked each wavelength of this direction input, or does not connect the corresponding input port of each wavelength of this direction;
2. the wavelength selection unit of the line direction of service wavelength transmission sources node is carried out following setting: the wavelength selection unit of line direction that the wavelength selection unit of line direction of service wavelength operating path institute warp and service wavelength protection path institute warp are set is straight-through to the wavelength of setting out on a journey;
3. the wavelength selection unit of the line direction of the intermediate node of service wavelength operating path transmission institute warp is carried out following setting: it is straight-through to this service wavelength of line direction input that this wavelength selection unit is set;
4. the wavelength selection unit of the line direction of the intermediate node of service wavelength protection path transmission institute warp is carried out following setting: it is straight-through to this service wavelength of line direction input that this wavelength selection unit is set.
6, the optical layer protective method of ROADM in the multinode ROADM looped network as claimed in claim 5 is characterized in that, in the described step (3), and for 1+1 Optical Channel Protection type,
When system's fault-free, controller further carries out following setting to actuator, make the service wavelength of system's selective reception through operating path transmission: the wavelength selection unit of Xia Lu unit that service wavelength transmission destination node is set is to straight-through through the wavelength of operating path transmission, to the wavelength blocking-up through the transmission of protection path;
There is fault to cause detector to detect when the wavelength of operating path transmission is unusual in system; controller further carries out following setting to actuator; make system's selective reception through protecting the service wavelength of path transmission: the wavelength selection unit that the Xia Lu unit of service wavelength transmission destination node is set leads directly to the wavelength through the transmission of protection path, to the wavelength blocking-up through the operating path transmission.
7, the optical layer protective method of ROADM in the multinode ROADM looped network as claimed in claim 4; it is characterized in that; in the described step (3); for the light-channel shared protection type; the wavelength selection unit that the line direction of each node at first is set is blocked each wavelength of this direction input, or does not connect the corresponding input port of each wavelength of this direction.
8, the optical layer protective method of ROADM in the multinode ROADM looped network as claimed in claim 7 is characterized in that, in the described step (3), and for the light-channel shared protection type,
When system's fault-free, controller further carries out following setting to actuator, makes service wavelength only send to operating path, does not send to the protection path:
I, the wavelength selection unit of the line direction of service wavelength transmission sources node is carried out following setting: the wavelength selection unit of line direction that service wavelength operating path institute warp is set is straight-through to this wavelength of setting out on a journey, wavelength selection unit this wavelength blocking-up to setting out on a journey of the line direction of service wavelength protection path institute warp;
II, the wavelength selection unit of the line direction of the intermediate node of service wavelength operating path transmission institute warp is carried out following setting: it is straight-through to this service wavelength of line direction input that this wavelength selection unit is set;
III, the wavelength selection unit of the line direction of the intermediate node of service wavelength protection path transmission institute warp is carried out following setting: this service wavelength blocking-up to the line direction input of this wavelength selection unit is set;
IV, the wavelength selection unit of Xia Lu unit of service wavelength transmission destination node is set to straight-through, to wavelength blocking-up through the transmission of protection path through the wavelength of operating path transmission.
There is fault to cause detector to detect when the wavelength of operating path transmission is unusual in system; controller further carries out following setting to actuator; make service wavelength send to operating path and protection path simultaneously, and selective reception is through protecting the wavelength of path transmission:
I, the wavelength selection unit of the line direction of service wavelength transmission sources node is carried out following setting: the wavelength selection unit of line direction that service wavelength operating path institute warp is set is straight-through to this wavelength of setting out on a journey, the wavelength selection unit of the line direction of service wavelength protection path institute warp is straight-through to this wavelength of setting out on a journey;
Ii, the wavelength selection unit of the line direction of the intermediate node of service wavelength operating path transmission institute warp is carried out following setting: it is straight-through to this service wavelength of line direction input that this wavelength selection unit is set;
Iii, the wavelength selection unit of the line direction of the intermediate node of service wavelength protection path transmission institute warp is carried out following setting: it is straight-through to this service wavelength of line direction input that this wavelength selection unit is set;
Iv, the wavelength selection unit of Xia Lu unit of service wavelength transmission destination node is set to straight-through, to wavelength blocking-up through the operating path transmission through the wavelength of protection path transmission.
9, the optical layer protective method of ROADM in the multinode ROADM looped network as claimed in claim 4; it is characterized in that; in the described step (3), for optical multiplexing section share protect type, the wavelength selection unit that the line direction of each node at first is set connects the corresponding input port of each wavelength of this direction.
10, the optical layer protective method of ROADM in the multinode ROADM looped network as claimed in claim 9 is characterized in that, in the described step (3), and for optical multiplexing section share protect type,
When system's fault-free, controller further carries out following setting to actuator, makes service wavelength only send to operating path, does not send to the protection path, and selective reception is through the wavelength of operating path transmission:
(1) each the wavelength blocking-up to the input of this direction of the wavelength selection unit of line direction is set;
(2) wavelength selection unit of the line direction of service wavelength transmission sources node is carried out following setting: the wavelength selection unit of line direction that service wavelength operating path institute warp is set is straight-through to this wavelength of setting out on a journey, wavelength selection unit this wavelength blocking-up to setting out on a journey of the line direction of service wavelength protection path institute warp;
(3) wavelength selection unit of the line direction of the intermediate node of service wavelength operating path transmission institute warp is carried out following setting: it is straight-through to this service wavelength of line direction input that this wavelength selection unit is set;
(4) wavelength selection unit of the line direction of the intermediate node of service wavelength protection path transmission institute warp is carried out following setting: the straight-through or blocking-up to this service wavelength of line direction input of this wavelength selection unit is set; Wherein, have at least a node to be set to blocking-up;
(5) wavelength selection unit of Xia Lu unit of service wavelength transmission destination node is set to straight-through, to wavelength blocking-up through the transmission of protection path through the wavelength of operating path transmission.
11, the optical layer protective method of ROADM in the multinode ROADM looped network as claimed in claim 9; it is characterized in that, in the described step (3), for optical multiplexing section share protect type; there is fault to cause detector to detect when the wavelength of operating path transmission is unusual in system
For the adjacent node of fault, controller further carries out following setting to actuator:
A, the wavelength selection unit of line direction that contiguous fault is set are straight-through to the wavelength of setting out on a journey of this node operating path, respectively to through the wavelength blocking-up of this direction of operating path and the input of Fei Ben direction and straight-through;
B, non-contiguous fault is set the wavelength selection unit of line direction to each wavelength blocking-up with fault side input, to the input of this direction not under this node the service wavelength on road straight-through;
C, the wavelength selection unit that the Xia Lu unit is set select wavelength to receive from the signal of the non-fault side input on road that this node descends;
For the nonneighbor node of fault, carry out following setting:
A, line direction is set wavelength selection unit to each wavelength blocking-up of this direction input;
This wavelength that b, the wavelength selection unit that the line direction of service wavelength operating path institute warp is set select this wavelength set out on a journey to set out on a journey by the wavelength selection unit blocking-up of the line direction of, service wavelength protection path institute warp;
C, line direction is set wavelength selection unit to straight-through through the wavelength of operating path transmission, straight-through to the wavelength that is subjected to fault effects through the transmission of protection path, for be not subjected to fault effects through the wavelength blocking-up of protection path transmission or straight-through;
The wavelength selection unit blocking-up of this wavelength that d, the wavelength selection unit that the line direction of service wavelength operating path institute warp is set are selected road down by the line direction of, service wavelength protection path institute warp be this wavelength on road down.
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| US6400476B1 (en) * | 1997-12-31 | 2002-06-04 | Cisco Photonics Italy S.R.L. | Method and apparatus for transparent optical communication with two-fiber bidirectional ring with autoprotection and management of low priority traffic |
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