CN109639388B - End-to-end service management method based on OTN/SDH fusion equipment - Google Patents

End-to-end service management method based on OTN/SDH fusion equipment Download PDF

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CN109639388B
CN109639388B CN201910008169.4A CN201910008169A CN109639388B CN 109639388 B CN109639388 B CN 109639388B CN 201910008169 A CN201910008169 A CN 201910008169A CN 109639388 B CN109639388 B CN 109639388B
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vsdh
virtual
port
oduk
virtual port
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CN109639388A (en
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潘杰
姚世勇
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Fiberhome Telecommunication Technologies Co Ltd
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Fiberhome Telecommunication Technologies Co Ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J14/00Optical multiplex systems
    • H04J14/02Wavelength-division multiplex systems
    • H04J14/0227Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J3/00Time-division multiplex systems
    • H04J3/16Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
    • H04J3/1605Fixed allocated frame structures
    • H04J3/1652Optical Transport Network [OTN]
    • H04J3/167Optical Transport Network [OTN] interaction with SDH/SONET, e.g. carrying SDH/SONET frames, interfacing with SDH/SONET

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

The invention discloses an end-to-end service management method based on OTN/SDH fusion equipment, which comprises the following steps: creating a VSDH virtual port and relevant attributes thereof at an ODUk side of the OTN/SDH fusion equipment; the VSDH virtual port is bound with an ODUk channel ID; generating a virtual link and adding the virtual link into the path-finding matrix and the virtual link connection table; and creating and activating SDH service by using the VSDH virtual port, and issuing the VSDH virtual port and the mapping relation bound with the ODUk service to the OTN/SDH fusion equipment together when the ODUk service is downloaded. The VSDH virtual port created by the invention has the characteristics of a real SDH device port, can be directly used as an SDH interface when SDH service is created, and can be realized by configuring related attributes through software without adding hardware equipment, thereby reducing the cost and being convenient and quick to configure.

Description

End-to-end service management method based on OTN/SDH fusion equipment
Technical Field
The invention relates to the technical field of communication transmission networks, in particular to an end-to-end Network management service management method based on an OTN/SDH fusion device, which is used for realizing seamless butt joint between old SDH (synchronous digital transmission system) equipment and large-bandwidth OTN (Optical Transport Network) equipment of a communication transmission Network and carrying out end-to-end service management through Network management.
Background
The OTN is based on the wavelength division multiplexing technology, introduces strong operation, maintenance, management and assignment (OAM) capabilities of the SDH on the basis of an ultra-large transmission capacity, and simultaneously makes up for the lack of functions and the deficiency of maintenance and management overhead of the SDH when facing the transport layer, which is a main technology of the next generation backbone transport network.
The basic object of OTN processing is wavelength level traffic, which pushes the transport network to the true multi-wavelength optical network stage. Due to the combination of the advantages of optical domain and electrical domain processing, OTN can provide huge transport capacity, fully transparent end-to-end wavelength/sub-wavelength connection and carrier-grade protection, and is the optimal technology for transporting broadband large-granule services.
The main advantage of OTN is full backward compatibility, it can be built on the existing SONET/SDH management function, it not only provides full transparency of existing communication protocol, but also provides end-to-end connection and networking capability for WDM, it provides optical layer interconnection specification for ROADM, and supplements sub-wavelength convergence and grooming capability.
Therefore, with the rapid development of telecommunication services, the size of the transmission network is continuously enlarged, and the mainstream transmission network equipment has been replaced by OTN equipment. However, since service fusion cannot be realized between the OTN device and the SDH device, a large amount of SDH devices will be eliminated in the device update process, resulting in great resource waste.
The scheduling unit is a centralized scheduling unit, which is composed of a large-capacity transparent cross unit and one or more special cross units connected under the transparent cross unit, the large-capacity transparent cross unit accesses the service, and directly performs cross configuration or schedules to the connected special cross unit for further processing according to the configuration requirement of the accessed service, the processed signal is scheduled to the required output port, and then the processed signal is sent to the service processing unit and the WDM processing unit for subsequent processing, i.e. the conventional service and the small-particle data service are scheduled by SDH/SONET and MSTP equipment, and the large-particle service signal is directly scheduled by OTN cross equipment, so that the original independent SDH and OTN equipment are organically integrated. However, this solution requires the addition of corresponding cross hardware devices, which is costly. And it does not disclose how to achieve end-to-end traffic management.
In view of this, it is necessary to improve the existing fusion scheme of the OTN and SDH devices, reduce the cost of upgrading and transformation, and conveniently implement end-to-end service management through a network manager.
Disclosure of Invention
The invention aims to solve the technical problems that the existing SDH and OTN fusion scheme has high cost and can not conveniently realize end-to-end service management.
In order to solve the above technical problem, the technical solution adopted by the present invention is to provide an end-to-end service management method based on OTN/SDH convergence device, comprising the following steps:
on the ODUk side of the OTN/SDH fusion device, a VSDH virtual port and relevant attributes thereof are created, wherein the relevant attributes of the VSDH virtual port comprise the following attributes of the VSDH virtual port: the network element ID, the main interface number, the ODUk mapping mode and the port rate are all the same;
the VSDH virtual port is bound with an ODUk channel ID;
generating a virtual link, adding the virtual link into a path searching matrix and a virtual link connection table, and using the virtual link for path searching of the SDH service;
and creating and activating SDH service by using the VSDH virtual port, and issuing the VSDH virtual port and the mapping relation bound with the ODUk service to OTN/SDH fusion equipment together when the ODUk service is downloaded.
In the above method, when the VSDH virtual port is created, a corresponding VSDH host interface number is stored in a source-sink node attribute configuration of the ODUk circuit.
In the above method, when the VSDH virtual port is bound, the highest port rate is set and cannot exceed the bandwidth of the ODUk.
In the above-mentioned method, the first step of the method,
the method for binding the ODUk channel and the VSDH virtual port comprises the following steps:
calling a network element configuration server to check all currently created VSDH virtual ports and used VSDH virtual ports;
selecting an idle VSDH virtual port, and generating a new VSDH virtual port according to the ODKU circuit bandwidth;
and binding the generated main interface of the VSDH virtual port with the attribute of the ODUk source-sink cross node.
In the above-mentioned method, the first step of the method,
the method for unbinding the VSDH virtual port is as follows:
acquiring network element configuration, and judging whether the ODUk channel ID bound by VSDH is empty or not;
if not, deleting the virtual link from the routing matrix, then deleting the virtual link, destroying the object, deleting the VSDH virtual port, and finally modifying the activation state of the service and reporting to the network manager;
if the ODUk circuit IS activated, changing a FLAG of a source-sink cross item of a working path of the ODUk circuit into a FLAG _ IS _ DIABLE; acquiring the configuration of the VSDH virtual port in the network element configuration, setting the slot number, the channel ID and the port level to be 0, and issuing a configuration modification command; and deleting the data of the relevant VSDH virtual port in each service.
In the method, generating the virtual link for routing comprises the following steps:
obtaining all available VSDH virtual ports;
selecting time slots of source and sink ports;
selecting a VSDH virtual port required to be used in the routing strategy;
the method comprises the steps that a network element port which can be used for crossing is searched through a source port, after a VSDH virtual port is found, a virtual link connection table which is created when the VSDH virtual port is bound before is searched through the VSDH virtual port, the VSDH virtual port of a host end is found according to a corresponding found virtual link, and then an SDH port which can cross the VSDH virtual port is found until the introduced host port is found to be unknown.
In the above method, when the ODUk service is downloaded,
for the ODUk circuit, the relevant information that the VSDH virtual port needs to download includes:
VSDH virtual port: a line disk virtual interface, which is specified when an ODUk binds a VSDH;
adding a slot number, an associated ODUk channel ID and a mapping mode;
for an SDH circuit, the relevant information that the VSDH virtual port needs to download includes:
VSDH VC4 interface: hanging VC4 time slots under a VSDH virtual port;
and adding a slot number, an associated ODUk channel ID and a mapping mode.
In the above method, one ODUk may carry multiple SDH services, but the sum of SDH service bandwidths cannot be greater than the ODUk channel bandwidth.
In the method, the same network element may create a plurality of VSDH virtual ports, and the VSDH virtual ports are identified by the host interface number.
In the method, when the VSDH virtual port is unbound, the circuit is backed up first, and if the unbound error occurs, the backup circuit is used for rolling back the state.
Compared with the prior art, the invention creates the VSDH virtual port and establishes the mapping at the ODUk side of the OTN/SDH fusion equipment, and when the ODUk service is downloaded, the VSDH virtual port and the mapping relation bound with the ODUk service are issued to the OTN/SDH fusion equipment together. Because the created VSDH virtual port has the characteristics of a real SDH device port, the VSDH virtual port can be directly used as an SDH interface when SDH service is created, and can be realized by configuring related attributes through software without adding hardware devices, the cost is reduced, and the configuration is convenient and quick.
Drawings
Fig. 1 is a schematic diagram of a conventional SDH service model;
fig. 2 is a schematic diagram of an existing common OTN service model;
FIG. 3 is a schematic diagram of an OTN/SDH fusion device according to the present invention;
FIG. 4 is a flow chart of an end-to-end service management method based on OTN/SDH fusion equipment in the present invention;
FIG. 5 is a flow chart of VSDH virtual port binding in the present invention;
FIG. 6 is a flow chart of the VSDH virtual port unbinding in the present invention;
fig. 7 is a flowchart of generating a virtual link for routing according to the present invention.
Detailed Description
The invention provides an end-to-end service management method based on an OTN/SDH fusion device, wherein the OTN device is connected with the SDH device through the OTN/SDH fusion device, a virtual SDH interface (hereinafter referred to as VSDH virtual port) is created and mapped on the basis of the existing ODUk, and the mapping is butted with a real SDH device interface, thereby realizing the seamless butting of the SDH device and the OTN device and carrying out end-to-end management through a network manager. The technical scheme of the invention is convenient to realize, the equipment reconstruction cost is low, and the invention is very suitable for transitional upgrading reconstruction from the SDH system to the OTN system. The invention is described in detail below with reference to the figures and specific examples.
Fig. 1 is a schematic diagram of a conventional general SDH service model, and it can be seen from the diagram that services on a branch side are directly crossed with SDH ports on a line side through a cross disk to create services.
Fig. 2 is a schematic diagram of an existing general OTN service model, and it can be seen from the diagram that a branch board is also electrically crossed with a line side through a cross board.
Based on the analysis of the above two service models, the conventional ODUk service creates ODUk particles on port ports of a backplane of a line disk at both ends of the service, and the ODUk particles and the port ports have a mapping relationship, so the implementation principle of the present invention is as follows: by creating a VSDH virtual port on the ODUk particle, an EMS network manager can see the VSDH virtual interface existing on a single disk, and the VSDH virtual port has the characteristics of a real SDH equipment port and can be directly used as an SDH interface when an SDH service is created; after the VSDH virtual port is created, the VSDH virtual port is issued to the OTN/SDH fusion device, the issued content includes the ODUk channel ID associated with the OTN/SDH fusion device, the OTN/SDH fusion device analyzes the ODUk channel ID, the ODUk channel ID is associated with the created ODUk particles, and seamless butt joint of old SDH devices and OTN devices is achieved.
The scheme of the invention only establishes the VSDH virtual port at the ODUk side of the SDH/OTN fusion equipment, does not need to increase hardware equipment excessively, and greatly reduces the cost in the networking updating process.
By combining the above inventive principles, the implementation of the basic technical solution of the end-to-end service management method based on OTN/SDH convergence device provided by the present invention includes the following steps:
on the ODUk side of the OTN/SDH fusion device, a VSDH virtual port and relevant attributes thereof are created, wherein the relevant attributes of the VSDH virtual port comprise the following attributes of the VSDH virtual port: the network element ID, the main interface number, the ODUk mapping mode and the port rate are all the same;
the VSDH virtual port is bound with an ODUk channel ID;
generating a virtual link, adding the virtual link into a path searching matrix and a virtual link connection table, and using the virtual link for path searching of the SDH service;
and creating and activating an SDH service by using the VSDH virtual port on a network manager, and issuing the VSDH virtual port and the mapping relation bound with the ODUk service to OTN/SDH fusion equipment together when the ODUk service is downloaded.
In order to make the technical solution and implementation of the present invention more clearly explained and illustrated, several preferred embodiments for implementing the technical solution of the present invention are described below. It should be understood that the specific embodiments described below are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1.
As shown in fig. 3 and fig. 4, an end-to-end network management service management method based on an OTN/SDH convergence device provided in embodiment 1 of the present invention includes the following steps:
step S10, creating a VSDH virtual port on the ODUk side of the OTN/SDH convergence device, and setting relevant attributes of the created VSDH virtual interface by creating some information.
Relevant attributes of a VSDH virtual port include: the affiliated network element ID m _ iNeId is used for indicating that the VSDH virtual port belongs to the network element; the host interface number m _ iMainIndex is used for indicating and identifying the VSDH virtual port; the mapping mode m _ eMapType of the ODUk is used for analyzing the OTN/SDH fusion equipment; and a port rate m _ ePortRate, configured to determine resource size for use when creating an SDH service later and performing a path finding, where the attribute is also used when the relevant attribute of the VSDH virtual port is issued to the OTN/SDH fusion device, and is used to notify the OTN/SDH fusion device of the port bandwidth of the VSDH virtual port, where the port bandwidth of the VSDH virtual port cannot exceed the bandwidth of the ODUk at the highest.
According to the relevant attributes of the VSDH virtual port, the VSDH virtual port has the characteristics of a real SDH port, so that SDH services can be directly created on a network manager.
When a VSDH virtual port is created, a corresponding VSDH host interface number is stored in the attribute configuration of the original node of the ODUk circuit. For example, the VSDH host interface number m _ imalndex is saved in the m _ ipseid of cross configured by the original node attribute, so as to bind the VSDH virtual port with the ODUk.
According to the scheme of the invention, the same network element can create a plurality of VSDH virtual ports and distinguish the VSDH virtual ports through the main interface number.
Step S20, binding the VSDH virtual port with the ODUk.
The function of this step is to bind the VSDH virtual port to the current existing ODUk service, that is, bind the VSDH virtual port to the ODUk channel ID, and after the attribute of the VSDH virtual port is issued to the OTN/SDH fusion device, identify, according to the ODUk channel ID, which ODUk channel the signal on the VSDH virtual port should travel.
And step S30, generating a virtual link for path finding of the SDH service.
Because the current network management carries out the path searching operation through the link, in the scheme, after the VSDH virtual port is bound, the path searching operation is carried out when the SDH service is created by creating the virtual link.
The attributes of the virtual link include source and destination VSDH virtual ports of the link, and after the VSDH virtual ports are bound to the ODUk channels, the VSDH virtual ports at both ends of the virtual link are also created, and these attributes can be directly filled into the virtual link for storage, and are directly used in the following routing.
As shown in fig. 7, when generating a virtual link and performing a path finding, the scheme of the present invention first calls a VSDH virtual port function (e.g., getobj byconditions ()) to obtain all available VSDH virtual ports;
then, selecting time slots of a source port and a sink port on a management interface of the network manager, and selecting a VSDH virtual port required to be used in a routing strategy;
the EMS network management starts to search the network element port which can be used for crossing through the source port, after finding the VSDH virtual port, the VSDH virtual port is searched in the virtual link connection table which is created when the VSDH virtual port is bound through the VSDH virtual port, after finding the corresponding virtual link, the VSDH virtual port of the host end is found according to the virtual link, and then the SDH port which can cross with the VSDH virtual port is found until the imported host port is unknown.
And finally, carrying out path finding through a path finding interface to generate an optimal virtual link.
The getobj byconditions () function may return different results by importing different conditions, for example, in this scenario, all available VSDH virtual ports may be returned by importing a condition that the VSDH virtual port is not occupied.
Step S40, creating and activating an SDH service using the VSDH virtual port, and when downloading the ODUk service, issuing the ODUk service, the VSDH virtual port, and the mapping relationship thereof to the OTN/SDH convergence device.
In the scheme of the invention, because the created VSDH virtual port has the characteristics of a real SDH port, when the SDH service is created, adaptation is carried out on the basis of the original route searching, the route searching process is directly used as a link after encountering the VSDH virtual port, the corresponding virtual link is searched in the virtual link created when the VSDH virtual port is bound through the VSDH virtual port, after the corresponding virtual link is found, the VSDH virtual port of a host end is found, the route searching is carried out all the time, and the SDH service is created finally.
And issuing the created service to the OTN/SDH fusion equipment, and when the OTN/SDH fusion equipment returns a message of successful issuing, indicating that the VSDH virtual port is activated, so that the VSDH virtual port establishes a connection with the ODUk.
At the time of the download of the service,
for the ODUk circuit, the relevant information to be downloaded includes:
a VSDH virtual port, which is designated when the ODUk binds the VSDH virtual port;
adding a slot number, an associated ODUk channel ID, and a mapping mode.
For SDH circuits, the relevant information that needs to be downloaded includes:
a VSDH VC4 interface, wherein a VSDH virtual port hangs a VC4 time slot;
adding a slot number, an associated ODUk channel ID, and a mapping mode.
For SDH interleaving: the SDH VC4 interface is configured as a VSDH VC4 interface.
One ODUk can carry multiple SDH services, but the sum of the SDH service bandwidths cannot be greater than the bandwidth of an ODUk channel.
Example 2.
As shown in fig. 5, embodiment 2 of the present invention is a specific refinement of creating a VSDH virtual port and binding, and includes the following steps:
step S21: calling a network element configuration server to check all currently created VSDH virtual ports and used VSDH virtual ports;
step S22: selecting an idle VSDH virtual port, detecting whether the selected VSDH virtual port is used or not again, and if the selected VSDH virtual port is not used, generating a new VSDH virtual port according to the ODKU circuit bandwidth; if used, reselecting an idle VSDH virtual port;
step S23: binding the generated main interface number of the VSDH virtual port with the m _ iPereld attribute of the ODUk source and destination node;
and step S24, adding the generated VSDH virtual port into the m-mapVePort attribute of the network element for management.
Step S25: and generating a virtual link and adding the virtual link into the path finding matrix and the virtual link connection table.
Example 3.
As shown in fig. 6, embodiment 3 of the present invention is a specific refinement of the unbinding of the VSDH virtual port, and includes the following steps:
step S31: the backup circuit is used for performing state rollback by using the backup circuit when the VSDH virtual port is subjected to unbinding and has an error;
step S32: acquiring network element configuration, and judging whether a VSDH virtual port is activated or not according to whether an ODUk channel ID bound by the VSDH virtual port is empty or not; if so, go to step S33; if not, go to step S38;
step S33: calling Ccirexit, namely a PreDeleteVsdh interface (pre-deleting VSDH virtual port), and carrying out pretreatment before deleting the VSDH virtual port, such as occupation removal and the like;
step S34: the download FLAG of the source-sink cross entry of the working path of the ODUk circuit IS changed to FLAG _ IS _ table (indicating that the VSDH virtual port has not been downloaded). After this operation is performed, the VSDH virtual port is not successfully unbound, because the network element configuration needs to remove the ODUk attribute related to the VSDH virtual port;
step S35: downloading the ODUk circuit, wherein the downloading FLAG of the source-sink cross item IS FLAG _ IS _ DIABLE, which indicates that the VSDH virtual port IS being unbound at the moment;
step S36: acquiring the configuration of the VSDH virtual port in the network element configuration, setting the slot number, the channel ID and the port level to be 0, and issuing a configuration modification command;
step S37: after the network element configuration returns a message of successful download of the configuration modification command, the flag of the circuit source and sink cross item is checked; if the number IS FLAG _ PVE _ IS _ DISABLE, it IS indicated that the VSDH virtual port IS just downloaded, and data of the relevant VSDH virtual port in the multi-service IS deleted; otherwise, go to step 35;
step S38: calling Ccriit, namely a DeleteSve interface (port deletion) and deleting a VSDH virtual port;
step S39: deleting the virtual link from the routing matrix; deleting the virtual link, destroying the object of the virtual link, and deleting the VSDH virtual port from the m _ mapVePort;
step S40: and modifying the activation state of the SDH service and reporting to finish the unbinding of the VSDH virtual port.
Example 4.
The specific method for generating the virtual link is as follows:
binding the generated VSDH main interface number to an m _ iPervel attribute of an ODUk source and sink crossing network element;
and generating a virtual link, initializing the time slot size of a virtual link port, and adding the generated virtual link into the path finding matrix and the virtual link connection table.
Example 5.
As shown in fig. 3, the process of creating a service using the method of the present invention is as follows:
selecting one OCH port of a 4LU2 disk of the fusion device 1 as a source port, and one OCH port of a 4LU2 disk of the fusion device 2 as a sink port to create an OCH service;
selecting a backplane port of a 4LU2 disk of the fusion device 1 as a source port, selecting a backplane port of a 4LU2 disk of the fusion device 2 as a sink port, selecting the OCH service created in the previous step as a service layer, and creating an ODUk;
binding a VSDH virtual port on the created ODUk, wherein both a source network element and a destination network element generate a virtual VSDH virtual port;
an SDH port of the S4V1 disk of the fusion device 1 is selected as a source port, and an SDH port of the S4V1 disk of the fusion device 2 is selected as a sink port, an SDH service is created, and a path finding is performed through the previously created VSDH virtual port.
The scheme of the invention has the following obvious advantages:
(1) the VSDH virtual port is established and is in butt joint with a real SDH device interface, seamless butt joint of the SDH device and the OTN device is achieved, and construction cost is greatly reduced.
(2) The created VSDH virtual port has the characteristics of a real SDH device port, can be directly used as an SDH interface when SDH service is created, and is convenient to use.
(3) The VSDH virtual port can carry out end-to-end service management through network management, thereby facilitating service management.
(4) The technical scheme is simple to realize.
The present invention is not limited to the above-mentioned preferred embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.

Claims (8)

1. An end-to-end service management method based on OTN/SDH fusion equipment is characterized by comprising the following steps:
on the ODUk side of the OTN/SDH fusion device, a VSDH virtual port and relevant attributes thereof are created, wherein the relevant attributes of the VSDH virtual port comprise the following attributes of the VSDH virtual port: the network element ID, the main interface number, the ODUk mapping mode and the port rate are all the same;
binding the generated VSDH main interface number to an m _ iPervel attribute of an ODUk source and sink crossing network element;
generating a virtual link, initializing the time slot size of a virtual link port, and adding the generated virtual link into a path finding matrix and a virtual link connection table;
creating and activating an SDH service by using the VSDH virtual port, and issuing the VSDH virtual port and the mapping relation bound with the ODUk service to OTN/SDH fusion equipment when the ODUk service is downloaded;
the method for binding the ODUk channel and the VSDH virtual port comprises the following steps:
calling a network element configuration server to check all currently created VSDH virtual ports and used VSDH virtual ports;
selecting an idle VSDH virtual port, and generating a new VSDH virtual port according to the ODKU circuit bandwidth;
binding a main interface of the generated VSDH virtual port with the attribute of the ODUk source-destination cross node;
the method for unbinding the VSDH virtual port is as follows:
acquiring network element configuration, and judging whether the ODUk channel ID bound with the VSDH is empty or not;
if not, deleting the virtual link from the routing matrix, then deleting the virtual link, destroying the object, deleting the VSDH virtual port, and finally modifying the activation state of the service and reporting to the network manager;
if the ODUk circuit IS activated, changing a FLAG of a source-sink cross item of a working path of the ODUk circuit into a FLAG _ IS _ DIABLE; acquiring the configuration of the VSDH virtual port in the network element configuration, setting the slot number, the channel ID and the port level to be 0, and issuing a configuration modification command; and deleting the data of the VSDH virtual port in each service.
2. The method of claim 1, wherein upon creation of the VSDH virtual port, a corresponding VSDH host interface number is stored in a source-sink node attribute configuration of an ODUk circuit.
3. The method of claim 1, wherein when the VSDH virtual port is bound, a highest port rate of the VSDH virtual port is set to be not greater than a bandwidth of an ODUk.
4. The method of claim 1, wherein generating the virtual link for routing comprises:
obtaining all available VSDH virtual ports;
selecting time slots of source and sink ports;
selecting a VSDH virtual port required to be used in the routing strategy;
the method comprises the steps of starting to search a network element port which can be used for crossing through a source port, finding a VSDH virtual port, then searching a virtual link connection table which is created when the VSDH virtual port is bound through the VSDH virtual port, finding a VSDH virtual port of a host end according to a found corresponding virtual link, and then finding an SDH port which can cross the VSDH virtual port until finding an introduced host port.
5. The method of claim 1, wherein, when downloading ODUk traffic,
for the ODUk circuit, the information that the VSDH virtual port needs to download includes:
VSDH virtual port: a line disk virtual interface, which is specified when an ODUk binds a VSDH;
adding a slot number, an associated ODUk channel ID and a mapping mode;
for an SDH circuit, the information that the VSDH virtual port needs to download includes:
VSDH VC4 interface: hanging VC4 time slots under a VSDH virtual port;
and adding a slot number, an associated ODUk channel ID and a mapping mode.
6. The method according to claim 1, wherein one ODUk can carry multiple SDH services, but the sum of SDH service bandwidths cannot be greater than an ODUk channel bandwidth.
7. The method of claim 1, wherein the same network element can create multiple VSDH virtual ports, identified by a host interface number.
8. The method of claim 1, wherein when the VSDH virtual port is unbound, the circuit is backed up first, and if the unbound circuit is incorrect, the backup circuit is used to perform a status rollback.
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