CN101902667B - Business-ODUk frame mapping method and system - Google Patents
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Abstract
The invention discloses a business-ODUk frame mapping method and a system, which are applied in an ODUk cross system, and the method comprises the following steps: leading a master station to release the business-ODUk mapping according to the business type of a business, and configuring a mark of the business type of the business and business-ODUk frame mapping information in an ODU overhead and sending to a slave station; and leading the slave station to realize the business-ODUk frame automatic mapping according to the mark of the business type and the mapping information. The technical scheme provided by the invention can realize the automatic configuration of a network terminal in the ODUk cross scheduling system, reduce the complexity in manual configuration and improve the accuracy of configuration maintenance.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a method and a system for mapping a service and Optical channel data Unit k (Optical data Unit, ODUk for short) frame.
Background
At present, most of service cross scheduling developed gradually in a transport network is based on cross scheduling of ODUk (k is 0, 1, 2, 3, 4) particles, a client access service is mapped into an ODUk frame, and service scheduling meeting user requirements is performed through cross based on the ODUk particles.
As the types of the client access services are numerous, in order to implement service interworking between sites, in the ODUk cross system, very complicated manual configuration needs to be performed at both ends of a network terminal, where contents to be configured at least include the following:
(1) each port service type;
(2) ODUk frame type;
(3) mapping relation between service type and ODUk;
(4) and (5) service scheduling cross relation.
In particular, in a complex network architecture, network terminals of multiple sites are not located at the same position, but manual configuration of the network terminals must be consistent, and if errors occur, the service cannot be opened, which brings great troubles to engineering configuration and maintenance, and the error rate is very high because of too much manual work.
Disclosure of Invention
The invention provides a mapping method and a mapping system of a service and an ODUk frame, aiming at the problems of complex manual configuration, high error rate and the like of a network terminal in an ODUk cross scheduling system in the related art, and aims to solve at least one of the problems.
According to an aspect of the present invention, a method for mapping a service and an ODUk frame is provided.
The method for mapping the service and the optical path data unit ODUk frame, which is applied to the ODUk cross system, includes: the method comprises the steps that a master site realizes mapping between services and ODUk frames according to service types of the services, and service type identifiers of the services and mapping information of the services and the ODUk frames are configured in ODU overhead and sent to a slave site; and the slave station realizes the automatic mapping of the service and the ODUk frame according to the service type identification and the mapping information.
According to another aspect of the present invention, a mapping system of a service and an ODUk frame is provided.
The mapping system of the service and the ODUk frame, which is applied to the ODUk crossing system, comprises the following steps: the system comprises a master site, a slave site and a service management server, wherein the master site is used for realizing mapping between a service and an ODUk frame according to the service type of the service, and configuring a service type identifier of the service and mapping information between the service and the ODUk frame in an ODU overhead and sending the service type identifier and the mapping information to the slave site; and the subordinate site is used for realizing automatic mapping of the service and the ODUk frame according to the service type identifier and the mapping information.
According to the invention, the master site realizes the mapping of the service and the ODU scheduling unit according to the service type, and automatically configures the service type identifier and the mapping information corresponding to the mapping in the ODU overhead and sends the mapping information to the slave site; the slave station automatically realizes the mapping between the service and the ODU scheduling unit according to the service type identifier and the mapping information, solves the problems of complex manual configuration, high error rate and the like of a network terminal in an ODUk cross scheduling system in the related technology, further can realize the automatic configuration of the network terminal in the ODUk cross scheduling system, reduces the complexity of the manual configuration and improves the accuracy of configuration and maintenance.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a flowchart of a mapping method of a service and an ODUk frame according to an embodiment of the present invention;
fig. 2 is a schematic diagram of overhead in an ODUk frame according to a preferred embodiment of the present invention;
fig. 3 is a schematic diagram of a master-slave service mapping according to a preferred embodiment of the present invention;
fig. 4 is a flowchart of a mapping method of a service and an ODUk frame according to a preferred embodiment of the present invention;
fig. 5 is a block diagram of a mapping system of a service and an ODUk frame according to an embodiment of the present invention;
fig. 6 is a block diagram of a mapping system of a service and an ODUk frame according to a preferred embodiment of the present invention.
Detailed Description
The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
According to an embodiment of the present invention, a method for mapping a service and an ODUk frame is provided.
Fig. 1 is a flowchart of a mapping method between a service and an ODUk frame according to an embodiment of the present invention. As shown in fig. 1, the mapping method of a service and an ODUk frame includes the following steps:
step S102, the master site implements mapping between the service and the ODUk frame according to the service type of the service, and configures the service type identifier and the mapping information between the service and the ODUk frame in the ODU overhead to send to the slave site.
Step S104, the slave station implements automatic mapping between the service and the ODUk frame according to the service type identifier and the mapping information.
Through the method, the master sends the service type identification and the mapping information of the service and the ODUk frame to the slave, the slave reads the information and automatically sets the service type of the slave according to the information, and the mapping configuration of the service type of the slave and the ODU cross scheduling unit is automatically set, so that plug-and-go can be realized in the sending and receiving of the master and the receiving and sending of the slave, complicated configuration is not needed to be carried out at both ends, and the configuration at both ends is not artificially ensured to be the same, thereby improving the accuracy and precision of configuration and maintenance.
Preferably, before executing step S102, the method may further include:
(1) determining a site which accesses a service firstly as a master site;
(2) and determining the station needing to receive the service as a slave station.
In particular implementation, the master-slave party may also be determined in a specified manner, but this method is inefficient. The invention adopts a preemptive processing mode, wherein one party accessing the service is the main party, and the other party receiving the service is the auxiliary party. This way it is possible to establish the master and slave more quickly and thus speed up the establishment of the service.
Preferably, the mapping manner of the service and the ODUk frame includes, but is not limited to, the following
(1) Mapping each service into an ODUk frame;
(2) mapping a plurality of services into an ODUk frame;
(3) one service is mapped into a plurality of ODUk frames.
In the current ODUK cross-dispatching system, various client service types need to be mapped into an ODU dispatching unit (i.e., an ODUK frame), where the cross granularity is a standard ODU specified by g.709.
Due to the diversity of service rates, the mapping relationships between three client services corresponding to the three mapping modes and the ODU scheduling unit are as follows:
(1) the client service types correspond to the ODU scheduling units one by one;
(2) the client service type and the ODU scheduling unit are many-to-one, namely a plurality of client service types are mapped to one ODU scheduling unit;
(3) the client service types and the ODU scheduling units are one-to-many, namely 1 client service type is mapped to a plurality of ODU scheduling units;
in a specific implementation process, the mapping relationship constitutes the mapping information, and when the service type identifier and the mapping information of the service and the ODUk frame are configured in the ODU overhead, the difference of the mapping relationship can be exhibited. The structure of ODU overhead is described below in connection with the example of fig. 2.
Fig. 2 is an overhead diagram in an ODUk frame according to a preferred embodiment of the present invention. As shown in fig. 2, what is transferred is a service type code and mapping information of a service port of the service and an ODU frame, that is, the overhead structure is a service type code arranged in sequence and a mapping sequence number of a port and an ODU frame corresponding to the service type code. For example: an STM1 (Synchronous transport mode, Synchronous Transmission Module-1) service is mapped into a 1/4 structure of a 0DU1 frame, wherein the service type code of fig. 2 can fill in 0x32, a master-slave two-end protocol provides that the value represents the STM1 service, an ODU1 is divided into 4 time slots according to the rate of 155.52Mbit/s, the service occupies the 2 nd 1/4 time slot of the ODU1, and the mapping sequence number of the port 3 and the ODU frame of fig. 2 can fill in 2 when the service enters from the port 3.
Fig. 3 is a schematic diagram of service mapping of a master-slave according to a preferred embodiment of the present invention. As shown in fig. 3, taking the above example as an example, a service enters from port 3 of a master site, occupies the 2 nd 1/4 timeslot of an ODU1, is then cross-scheduled to a slave site through an ODUk, and after the slave site is parsed and configured, the service also occupies the 2 nd 1/4 timeslot of an ODU1 of the slave site, and is finally output from port 2. Therefore, service interworking requires that the mapping of the service and the ODUk frame by the master-slave station is consistent.
Preferably, before the slave station implements mapping between the service and the ODUK frame, the following processing may be further included:
(1) a slave site acquires a service type identifier and mapping information from an ODU overhead;
(2) and the slave site stores the acquired service type identification and mapping information locally.
In the preferred implementation process, the slave site resolves the service type identifier and the mapping information from the ODU overhead and stores the service type identifier and the mapping information in the local, that is, the information transmission and storage between the master and the slave are completed. And then, automatically setting the service type of the slave site according to the information of the configuration service of the master site, and automatically setting the mapping configuration of the slave service type and the ODU scheduling unit.
Preferably, the service type identifier may include: a service type code and/or a service center frequency. Mapping information includes, but is not limited to: and mapping relation between service ports of the services and the ODU frames.
In a specific implementation process, the parameters are not limited to the above parameters, and all parameters or indexes that can sufficiently express the service type and the mapping relationship may be configured to the ODU overhead as the service type identifier or the mapping information.
The preferred implementation described above is described below in conjunction with fig. 4.
Fig. 4 is a configuration flowchart of automatic service provisioning based on an ODUk crossbar system according to a preferred embodiment of the present invention. As shown in fig. 4, the method mainly includes the following steps:
step S402: the master and the slave seize, in time sequence, the access service is the master, and the other is the slave;
step S404: a master site automatically configures mapping with a part of time slots of an ODU scheduling unit or a plurality of ODU cross units according to the service type;
in the specific implementation process, the access to the service site at the master may be two ways, namely, automatically acquiring the service type and manually configuring the service type, which are not within the scope of the present invention and are not described in detail herein.
The master site automatically configures mapping between the master site and the ODU scheduling unit according to the service type, specifically: and mapping various services into corresponding ODUk according to the service bandwidth. For example, GE (Gigabit Ethernet) traffic is mapped into one ODU0, or into half of ODU 1; mapping an STM16 (synchronous transmission mode-16) service into 1 ODU 1; STM1 (Synchronous Transmission mode) traffic is mapped into the 1/4 structure of the 0DU1 frame. The value of k in the ODUk may be determined by a specific cross-dispatching system.
Step S406: the host automatically configures the service key information and the mapping information in step S404 in the ODU overhead;
after step S404 is executed, the host adds key service information (i.e., the service type identifier) to the ODU overhead, where the key service information includes: service code and/or service center frequency representing specific service type;
meanwhile, the host also needs to configure the mapping information of the service and the ODUk in step S404 in the overhead of the ODU frame structure for information transfer. Reference may be made in particular to the example shown in fig. 2.
As transferred in fig. 2, is a service type code, and mapping information of each port and ODU frame. For example: mapping Synchronous transport mode (Synchronous transport module-1, abbreviated as STM1) service into 1/4 structure of 0DU1 frame, where the service type code of fig. 2 can fill in 0x32, the protocol at the master and the slave ends specifies that the value represents STM1 service, and dividing ODU1 into 4 slots according to its rate of 155.52Mbit/s, so that the service occupies 2 nd 1/4 slot of ODU1, and enters from port 3, where the mapping sequence number of port 3 and ODU frame of fig. 2 can fill in 2; the mapping relationship can be as shown in fig. 3. The above filling method is only an example and is not limited thereto, but it requires protocol support at both ends of the service.
Step S408: cross scheduling, which transmits information to the slave site; the specific service flow direction is determined according to the actual configuration requirement of the service.
Step S410: the slave station acquires the service and configuration information in step S306 from the ODU overhead. And acquiring the overhead information written by the service source site (namely the corresponding main party) from the OTN transmission network of the subordinate site. The method specifically comprises the following steps: parsed from the traffic type code and port mapping information of fig. 2, and the information may be stored locally for processing in the following steps.
Step S412: the slave station automatically performs mapping between service type configuration and a part of timeslots of the ODU cross unit or several ODU cross units according to the overhead in step S310.
In a preferred implementation process, the service type of the slave site is configured according to the service type code analysis result in step S410, and the service port mapping information analysis result in step S410 is configured to the service mapping configuration of the slave site, for example, the STM1 service is configured, and occupies the 2 nd 1/4 timeslot of the ODU1 of the slave site, that is, the service type configuration information is set to the slave site.
According to the embodiment of the invention, a mapping system of the service and the ODUk frame is also provided.
Fig. 5 is a block diagram of a mapping system of a service and an ODUk frame according to an embodiment of the present invention. As shown in fig. 5, the above system includes:
the master site 52 is configured to implement mapping between a service and an ODUk frame according to a service type of the service, and configure the service type identifier and mapping information between the service and the ODUk frame in an ODU overhead to send to the slave site.
The slave station 54 is configured to implement automatic mapping between the service and the ODUk frame according to the service type identifier and the mapping information.
Through the system, the master site sends the service type identification and the mapping information of the service and the ODUk frame to the slave site, the slave site reads the information and automatically sets the service type of the slave site according to the information, and the mapping configuration of the slave site service type and the ODU cross scheduling unit is automatically set, so that the plug-and-go can be realized by sending and receiving at the master site and receiving and sending at the slave site, complicated configuration is not required to be carried out at both ends, and the configuration at both ends is not required to be artificially ensured to be the same, thereby improving the accuracy and precision of configuration and maintenance.
Preferably, the master site is a site accessing the service first, and the slave site is a site needing to receive the service.
The system adopts a preemptive processing mode, the site which is accessed with the service firstly is the master site, and the site which receives the service is the slave site, thereby accelerating the process of establishing the service.
Preferably, as shown in fig. 6, the master site may include one of the following modules:
a first mapping module 522, configured to map each service into one ODUk frame;
a second mapping module 524, configured to map multiple services into an ODUK frame;
a third mapping module 526 is configured to map one service into multiple ODUK frames.
Preferably, as shown in fig. 6, the subordinate station may also include any module having the above functions, which are: a first mapping module 542, a second mapping module 544, and a third mapping module 546.
Preferably, the subordinate site 54 may further include:
an obtaining module 548, configured to obtain a service type identifier and mapping information from an ODU overhead;
the storage module 550 is configured to store the service type identifier and the mapping information acquired by the acquisition module.
The obtaining module 548 resolves the service type identifier and the mapping information in the ODU overhead, and the storage module 550 stores the service type identifier and the mapping information in the local as a basis for mapping the service and the ODUk frame from the slave station. Therefore, the information transmission and storage of the master and slave sites are finished, and the mapping processing of the following slave sites can be facilitated.
To sum up, with the above embodiments provided by the present invention, in an ODUk-based cross system, the technical scheme provided by the present invention supports automatic provisioning of services, does not require complicated human intervention, can implement plug-and-play of services, completes automatic provisioning of services at both ends, can ensure fast provisioning of services at both ends, and can improve accuracy of configuration and maintenance.
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A method for mapping a service and an optical path data unit (ODUk) frame is applied to an ODUk cross system, and is characterized by comprising the following steps:
the method comprises the steps that a master site realizes mapping between a service and an ODUk frame according to the service type of the service, and configures service type identification of the service and mapping information of the service and the ODUk frame in an ODU overhead to be sent to a slave site;
the slave station realizes automatic mapping of the service and the ODUk frame according to the service type identifier and the mapping information; wherein,
before the master site implements mapping between a service and an ODUk frame, the method further includes:
determining a site which accesses the service firstly as the host site;
and determining the station needing to receive the service as the slave station.
2. The method of claim 1, wherein the enabling of the mapping of traffic to ODUk frames comprises one of:
mapping each service into an ODUk frame;
mapping a plurality of the services into an ODUk frame;
and mapping one service into a plurality of ODUk frames.
3. The method of claim 1, wherein before the slave site performs mapping of the traffic and the ODUK frame, the method further comprises:
the slave station acquires the service type identifier and the mapping information from the ODU overhead;
and the slave site stores the acquired service type identification and mapping information locally.
4. The method according to any one of claims 1 to 3,
the service type identification comprises: a service type code and/or a service center frequency;
the mapping information includes: and the mapping relation between the service port of the service and the ODU frame.
5. A mapping system of a service and an optical path data unit (ODUk) frame is applied to an ODUk cross system, and is characterized by comprising the following steps:
the system comprises a master site, a slave site and a slave site, wherein the master site is used for realizing mapping between a service and an ODUk frame according to the service type of the service, and configuring a service type identifier of the service and mapping information of the service and the ODUk frame in an ODU overhead and sending the service type identifier and the mapping information of the service and the ODUk frame to the slave site;
the slave station is configured to implement automatic mapping between the service and the ODUk frame according to the service type identifier and the mapping information; wherein,
the master site is a site which firstly accesses the service, and the slave site is a site which needs to receive the service.
6. The system of claim 5, wherein the master site and the slave site each comprise one of:
a first mapping module, configured to map each service to an ODUk frame;
a second mapping module, configured to map the multiple services to an ODUK frame;
a third mapping module, configured to map one service to multiple ODUK frames.
7. The system of claim 5, wherein the subordinate site comprises:
an obtaining module, configured to obtain the service type identifier and the mapping information from the ODU overhead;
and the storage module is used for storing the service type identifier and the mapping information acquired by the acquisition module.
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| CN102594648B (en) * | 2011-01-07 | 2014-11-05 | 中兴通讯股份有限公司 | Service scheduling method and apparatus |
| CN102170599A (en) * | 2011-05-09 | 2011-08-31 | 中兴通讯股份有限公司 | Method for realizing business mapping and device thereof |
| CN103248509B (en) * | 2012-02-13 | 2018-09-14 | 中兴通讯股份有限公司 | The management method and device of light data unit |
| CN103825751B (en) * | 2012-11-16 | 2017-11-24 | 华为技术有限公司 | Method, veneer, Network Management Equipment and the system to activate the service |
| CN103563395B (en) * | 2013-01-08 | 2017-09-08 | 华为技术有限公司 | A kind of graphic software platform method and apparatus of optical transfer network |
| CN105790875B (en) * | 2014-12-24 | 2019-04-30 | 深圳市中兴微电子技术有限公司 | A kind of cross scheduling method and device thereof |
| CN108076394B (en) * | 2016-11-11 | 2020-06-16 | 中国移动通信有限公司研究院 | Method and device for opening optical network service |
| CN110798333B (en) * | 2018-08-03 | 2022-04-01 | 中兴通讯股份有限公司 | Service information configuration method, device, system and storage medium |
| CN111683306B (en) * | 2020-05-20 | 2022-04-29 | 烽火通信科技股份有限公司 | Multi-service hybrid access method and device |
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