CN104270256A - Testing device and method for managing cross-platform network alarms and events - Google Patents
Testing device and method for managing cross-platform network alarms and events Download PDFInfo
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Abstract
The invention provides a testing device and method for managing cross-platform network alarms and events and relates to the technical field of device alarm testing. The testing device comprises a hardware platform, an SNMP agent module, a management module, an alarm storage module, a control module and an operating system, wherein the SNMP agent module, the management module, the alarm storage module, the control module and the operating system are installed on the hardware platform. The control module is responsible for carrying out systemized management, coordinating all the modules, carrying out system analysis on management activities, and optimizing all alarm interfaces. The operating system is responsible for receiving testing requirements input by users. The management module is responsible for converting the testing requirements input by the users into order codes. The alarm storage module is responsible for collecting and gathering the alarms of various devices, and enabling the alarm codes to form an alarm bank for being stored in a programming mode. The SNMP agent module is responsible for reporting the alarms or the events to a network management system. According to the device and the method, the alarms and events of the different device types can be simulated and generated, and alarm and event testing can be carried out efficiently.
Description
Technical field
The present invention relates to equipment alarm technical field of measurement and test, is specifically testing apparatus and the method for a kind of cross-platform network alarm and incident management.
Background technology
OTN (Optical Transport Network, optical transfer network) is based on wavelength-division multiplex technique, in the transport network of photosphere organization network, is follow-on Backbone Transport Network.OTN be by G.872, G.709, a series of ITU-T (ITU-T for ITU Telecommunication Standardization Sector such as G.798; International Telecommunication Union's telecommunication standardsization tissue) a new generation's " digital transmission system " of suggestion institute specification and " optical transport hierarchy "; traditional WDM (Wavelength Division Multiplexing, wavelength division multiplexing) network will be solved without wavelength/wavelet long traffic scheduling ability, the problem such as networking capability is weak, protective capability is weak.The basic object of OTN process is wavelength level business, and transport network is advanced to the real multi-wavelength light network stage by it.Owing to combining the advantage of area of light and electrical domain process, OTN can provide the long connection of huge transmission capacity, completely transparent end-to-end wavelength/wavelet and carrier-class protection, is the best techniques transmitting broadband services of large granularities.
PTN (Packet Transport Network, Packet Transport Network) refer to so a kind of optical transport network framework and concrete technology: between IP operation and bottom light-transmitting medium, be provided with an aspect, the requirement that it transmits for the sudden of Packet Service flow and statistic multiplexing and designing, be core with Packet Service and support that multi-service provides, there is lower TCO (Total cost of ownership, overall use cost), act on the traditional advantage of optical transport simultaneously, comprise high availability and reliability, efficient bandwidth management mechanism and traffic engineering, OAM (Operation Administration and Maintenance easily, operation management maintain) and webmaster, easily extensible, higher fail safe etc.
PON (Passive Optical Network, passive optical-fiber network) system configuration is primarily of OLT (the Optical Line Terminal of central office, optical line terminal), comprise ODN (the Optical Distribution Network of Passive Optical Components, optical distribution network), ONU/ONT (Optical Network Unit/Optical Network Terminal, the network unit/optical network terminal of user side) and EMS (Element Management System, Element management system) composition, adopt point-to-multipoint tree topology.An EPON comprises the optical line terminal that is installed on console for centralized control, and a collection of supporting optical network unit being installed on customer site.Optical distribution between OLT and ONU contains optical fiber and passive optical splitters or coupler.
In different network topologies, transmission network NMS broadband access network network management system of unifying manages equipment in network.Along with network IPization and FMC (Fixed-Mobile Convergence, fixing and Mobile Convergence) development, there is deep change in operator's O&M pattern, from moving towards with network type and NE type multi-zone supervision to merge management, there is higher requirement to O&M cost and Consumer's Experience simultaneously, in order to adapt to the development of future network, now progressively to new network management system evolution.Unified Network Management realizes the unified management of transmission and access device, fully meets the needs of UNE operation management.
Alarm management (comprising incident management) is a part very important in network management system, and its functional test is also particularly important.The verification mode of current alarm function, mainly in different network environments, uses real equipment to create true fault according to alarm producing cause, and in network management system, shows fault to reach test purpose.This kind of universal testing method is used to have following deficiency:
1. " alarm " total class is numerous, needs to use various method to manufacture true fault.Current alarm is divided into equipment alarm, service quality alarm, communication alarm, environment alarm, processes failed alarm etc., wherein alarm can be divided into four kinds of ranks again according to the order of severity, i.e. critical alarm, main alarm, minor alarm and prompt alarm.According to above-mentioned classification, alarm kind on single equipment can reach hundreds of even thousands of, the alarm of the network system of plurality of devices composition then can be more, so the crowd of the wide quantity of the scope of " alarm " as can be seen here, therefore adopt the method for testing manufacturing true fault, cannot meet network management alarm testing requirement.
2. the generation of alarm is limited to real equipment, and needs to manufacture true fault in different network environments.Along with united net management is used on a large scale, the equipment that a set of network management system will manage in different network environments simultaneously, testing webmaster alarm function like this will need the facility environment building Various Complex, and workload is huge.
3. pair regular traffic impacts.Such as test " warm start " alarm of the access device under united net management, equipment will be de-energized restarts, so just in operating data service, speech business, IPTV service etc. all by interruption, the adverse effect such as cause communication disruption, Consumer's Experience not good.
4. the alarm test time is subject to the restriction of human factor, and the time of test job is shorter, can not realize the length of testing speech of round-the-clock (24*7 hour).And network alarm management is often whole day continuous surveillance and operation in the application of project scenarios.
5. laboratory environment creates the alarm quantity rank on its incomparable Practical Project of alarm capacity produced of mode of alarm.
Summary of the invention
For the defect existed in prior art, the object of the present invention is to provide testing apparatus and the method for a kind of cross-platform network alarm and incident management, can simulate and produce distinct device type alarm and event, meet network management alarm and the event testing requirement of cross-platform dissimilar equipment in same test environment, high efficiencyly can carry out alarm and event test.
For reaching above object, the technical scheme that the present invention takes is: the testing apparatus of a kind of cross-platform network alarm and incident management, comprises hardware platform and is arranged on SNMP proxy module, administration module, alarm memory module, control module, the operating system on described hardware platform; Described control module, is responsible for the management of implementation system, coordinates each module, management activity is done to network analysis, optimizes each alarm interface; Described operating system, is responsible for the testing requirement receiving user's input; Described administration module, the testing requirement be responsible for user inputs changes into command code; Described alarm memory module, responsible collection gathers various kinds of equipment alarm, by the mode of programming, alarm code is formed alarm library storage; SNMP proxy module, is responsible for alarm or reporting events to network management system.
On the basis of technique scheme, described alarm memory module comprises class PON equipment alarm module, class OTN equipment alarm module, class PTN device alarm module, follow-up easily extensible equipment alarm module; Described class PON equipment alarm module is used for the alarm of PON device type and forms alarm storehouse; The alarm of the newly-increased classification of conversion is preserved to alarm storehouse; Described class OTN equipment alarm module is used for the alarm of OTN device type and forms alarm storehouse; The alarm that conversion newly increases classification is preserved to alarm storehouse; Described class PTN device alarm module is used for the alarm of PTN device type and forms alarm storehouse; The alarm that conversion newly increases classification is preserved to alarm storehouse; Described easily extensible equipment alarm module is used for follow-up newly added equipment type alarm and forms alarm storehouse; The alarm that conversion newly increases classification is preserved to alarm storehouse.
On the basis of technique scheme, in described administration module, command code is the command code of network management system identifiable design, process.
The present invention also provides the method for testing of a kind of cross-platform network alarm and incident management, comprises the following steps: step S101. user is by operating system input alarm test demand; Step S102. control module is retrieved according to described alarm test demand and is transferred respective class equipment alarm in the alarm storehouse of alarm memory module, and notifies administration module; The equipment alarm testing requirement collected is changed into command code and reports to SNMP proxy module by step S103. administration module; The command code received is reported to network management system by step S104.SNMP proxy module.
On the basis of technique scheme, in step S101, the mode that user inputs alarm test demand comprises: chosen the alarm parameter that needs are tested by the interface of operating system; The alarm needing to select is write in script, directly imports to operating system by script.
On the basis of technique scheme, in step S101, user selects for device type, alarm type, is merged into the compound mode of alarm report.
On the basis of technique scheme, in step S103, administration module is that time tag is stamped in the equipment alarm reported, and shows corresponding alarm initial time and end time.
The present invention also provides the testing apparatus of a kind of cross-platform network alarm and incident management, comprises hardware platform and is arranged on SNMP proxy module, administration module, alarm memory module, control module, operating system, the event memory module on described hardware platform; Described control module, is responsible for the management of implementation system, coordinates each module, management activity is done to network analysis, optimizes each alarm interface; Described operating system, is responsible for the testing requirement receiving user's input; Described administration module, the testing requirement be responsible for user inputs changes into command code; Described alarm memory module, responsible collection gathers various kinds of equipment alarm, by the mode of programming, alarm code is formed alarm library storage; SNMP proxy module, is responsible for alarm or reporting events to network management system; Event memory module, described event memory module is responsible for collecting the event gathering various kinds of equipment, by the mode of programming, event is formed event thesaurus and stores.
On the basis of technique scheme, described event memory module comprises class PON device events module, class OTN device events module, class PTN device event module, follow-up easily extensible device events module; Described class PON device events module is used for PON device type event and forms event thesaurus; The event that conversion newly increases classification is preserved to event thesaurus; Described class OTN device events module is used for OTN device type event and forms event thesaurus; The event that conversion newly increases classification is preserved to event thesaurus; Described class PTN device event module is used for PTN device types of events and forms event thesaurus; The event that conversion newly increases classification is preserved to event thesaurus; Described easily extensible device events module is used for follow-up newly added equipment types of events and forms event thesaurus; The event that conversion newly increases classification is preserved to event thesaurus.
The present invention also provides the method for testing of a kind of cross-platform network alarm and incident management, comprises the following steps: step S201. user is by operating system incoming event testing requirement; Step S202. control module is retrieved according to described event testing requirement and is transferred respective class device events in the event thesaurus of alarm memory module, and notifies administration module; The device events testing requirement collected is changed into command code and stamps time tag and reports to SNMP proxy module by step S203. administration module; The command code received is reported to network management system by step S204.SNMP proxy module.
Beneficial effect of the present invention is:
1, the present invention adopts the collection of alarm memory module to gather various kinds of equipment alarm, and by the mode of programming, alarm code is formed alarm storehouse, can simulate and produce the alarm of distinct device type, meet the network management alarm testing requirement of cross-platform dissimilar equipment in same test environment.
2, the present invention fast can simulate the generation of various types of alarm, save and manually manufacture human resources shared by alarm and material resources, the adverse effect such as communication disruption, Consumer's Experience can not be caused not good, high efficiencyly can carry out alarm test, alleviate workload.
3, in the present invention, user can select for device type, alarm type, is merged into the compound mode of the alarm report of meeting consumers' demand; Meanwhile, the frequency that user can select alarm to send, can make up the deficiency that laboratory test cannot reach the alarm management on Practical Project under alarm Large Copacity pressure, carries out whole day continuous surveillance and effectively controls the webmaster quality of version.
4, the present invention adopts the collection of event memory module to gather various kinds of equipment event, and by the mode of programming, event is formed event thesaurus, can simulate and produce distinct device types of events, meet the network management event testing requirement of cross-platform dissimilar equipment in same test environment.
Accompanying drawing explanation
Fig. 1 is the structural representation of the testing apparatus of cross-platform network alarm and incident management in first embodiment of the invention;
Fig. 2 is the structural representation of alarm memory module in the embodiment of the present invention;
Fig. 3 is the structural representation of the testing apparatus of cross-platform network alarm and incident management in second embodiment of the invention;
Fig. 4 is the structural representation of event memory module in the embodiment of the present invention;
Fig. 5 is the testing apparatus application block diagram in a network of cross-platform network alarm and incident management in the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
First embodiment:
Shown in Figure 1, in the present embodiment, the testing apparatus of cross-platform network alarm and incident management, comprise hardware platform and be arranged on SNMP (Simple Network Management Protocol Agent, Simple Network Management Protocol) proxy module, administration module, alarm memory module, control module, the operating system on described hardware platform.Described control module, is responsible for the management of implementation system, coordinates each module, management activity is done to network analysis, optimizes each alarm interface; Described operating system, is responsible for the testing requirement receiving user's input; Described administration module, the testing requirement be responsible for user inputs changes into command code, and described command code is the command code of network management system identifiable design, process; Described alarm memory module, responsible collection gathers various kinds of equipment alarm, by the mode of programming, alarm code is formed alarm library storage; SNMP proxy module, is responsible for alarm or reporting events to network management system.
Shown in Figure 2, described alarm memory module comprises class PON equipment alarm module, class OTN equipment alarm module, class PTN device alarm module, follow-up easily extensible equipment alarm module; Described class PON equipment alarm module gathers for collecting and stores the alarm storehouse of simulating the alarm of PON device type and being formed; The alarm that conversion newly increases classification is preserved to alarm storehouse; Described class OTN equipment alarm module gathers for collecting and stores the alarm storehouse of simulating the alarm of OTN device type and being formed; The alarm that conversion newly increases classification is preserved to alarm storehouse; Described class PTN device alarm module gathers for collecting and stores the alarm storehouse of simulating the alarm of PTN device type and being formed; The alarm that conversion newly increases classification is preserved to alarm storehouse; Described easily extensible equipment alarm module gathers for collecting and stores the alarm storehouse of simulating follow-up newly added equipment type alarm and being formed; The alarm that conversion newly increases classification is preserved to alarm storehouse, makes the testing apparatus of cross-platform network alarm and incident management can the alarm simulation of the more equipment of compatibility and test, has fully demonstrated the extensibility of this device.The testing apparatus of cross-platform network alarm and incident management fast can simulate the generation of various types of alarm, save and manually manufacture human resources shared by alarm and material resources, the adverse effect such as communication disruption, Consumer's Experience can not be caused not good, high efficiencyly can carry out alarm test, alleviate workload, meet the network management alarm testing requirement of cross-platform dissimilar equipment in same test environment.
Based on the cross-platform network alarm of device described in the first embodiment and the method for testing of incident management, comprise the following steps:
Step S101. user is by operating system input alarm test demand; The mode that user inputs alarm test demand comprises: chosen the alarm parameter that needs are tested by the interface of operating system; The alarm needing to select is write in script, directly imports to operating system by script.User can select for device type, alarm type, is merged into the compound mode of the alarm report of meeting consumers' demand; Simultaneously, the frequency (engineering still can reach 3000 ~ 4000 alarms every day after alarm shield is such as set) that user can select alarm to send, the deficiency that laboratory test cannot reach the alarm management on Practical Project under alarm Large Copacity pressure can be made up, carry out whole day continuous surveillance and effectively control the webmaster quality of version.
Step S102. control module is retrieved according to described alarm test demand and is transferred respective class equipment alarm in the alarm storehouse of alarm memory module, and notifies administration module;
The equipment alarm testing requirement collected is changed into command code and reports to SNMP proxy module by step S103. administration module; Administration module is that time tag is stamped in the equipment alarm reported, and makes the generation of alarm and terminates to show the corresponding alarm starting and ending time.When the testing apparatus of cross-platform network alarm and incident management also needs school, testing apparatus and ginseng need time synchronized before surveying network management system; Administration module can process the alarm that school produces time around, only has after completing when school, and alarm is just unified reports SNMP proxy module.
The command code received is reported to network management system by step S104.SNMP proxy module.
Table 1
| ? | Alarm 1 | Alarm 2 | Alarm n |
| PON type equipment | ? | ? | ? |
| OTN type equipment | ? | ? | ? |
| PTN type equipment | ? | ? | ? |
| …… | ? | ? | ? |
Ginseng is shown in Table 1, and user can according to this template by the requirement of operating system input alarm test, the device type such as simulated, the alarm type etc. of simulation.
Second embodiment:
Shown in Figure 3, in the present embodiment, the testing apparatus of cross-platform network alarm and incident management is substantially identical with the first embodiment, difference is also to comprise event memory module, described event memory module, responsible collection gathers the event of various kinds of equipment, by the mode of programming, event is formed event thesaurus and stores.This device adopts the collection of event memory module to gather various kinds of equipment event, and by the mode of programming, event is formed event thesaurus, can simulate and produce distinct device types of events, meet the network management event testing requirement of cross-platform dissimilar equipment in same test environment.
Shown in Figure 4, described event memory module comprises class PON device events module, class OTN device events module, class PTN device event module, follow-up easily extensible device events module; Described class PON device events module gathers for collecting and stores the event thesaurus of simulating PON device type event and being formed; The event that conversion newly increases classification is preserved to event thesaurus; Described class OTN device events module gathers for collecting and stores the event thesaurus of simulating OTN device type event and being formed; The event that conversion newly increases classification is preserved to event thesaurus; Described class PTN device event module gathers for collecting and stores the event thesaurus of simulating PTN device types of events and being formed; The event that conversion newly increases classification is preserved to event thesaurus; Described easily extensible device events module gathers for collecting and stores the event thesaurus of simulating follow-up newly added equipment types of events and being formed; The event that conversion newly increases classification is preserved to event thesaurus, change the event newly increased to preserve to event thesaurus, make the testing apparatus of cross-platform network alarm and incident management can the event simulation of compatible more equipment and test, fully demonstrate the extensibility of this device.The testing apparatus of cross-platform network alarm and incident management fast can simulate the generation of various types of event, save the human resources shared by artificial manufacture event and material resources, high efficiencyly can carry out event test, alleviate workload, meet the network management event testing requirement of cross-platform dissimilar equipment in same test environment.
Based on the cross-platform network alarm of device described in the second embodiment and the method for testing of incident management, comprise the following steps:
Step S201. user is by operating system incoming event testing requirement; The mode of user's incoming event testing requirement comprises: chosen the event argument that needs are tested by the interface of operating system; By being chosen needing the event argument of test by the interface of operating system of needing to select; The event needing to select is write in script, directly imports to operating system by script.User can select for device type, alarm type, is merged into the compound mode of the reporting events of meeting consumers' demand; Simultaneously, the frequency that user can select event to send, (in such as engineering every day can more than 10000 events), the deficiency that laboratory test cannot reach the incident management on Practical Project under event Large Copacity pressure can be made up, carry out whole day continuous surveillance and effectively control the webmaster quality of version.
Step S202. control module is retrieved according to described event testing requirement and is transferred respective class device events in the event thesaurus of alarm memory module, and notifies administration module;
The device events testing requirement collected is changed into command code and stamps time tag and reports to SNMP proxy module by step S203. administration module; Administration module is that the device events reported stamps time tag, enables the generation of event show corresponding event initial time.When the testing apparatus of cross-platform network alarm and incident management also needs school, testing apparatus and ginseng need time synchronized before surveying network management system; Administration module can process the event that school produces time around, only has after completing when school, and event is just unified reports SNMP proxy module.
The command code received is reported to network management system by step S204.SNMP proxy module.
Shown in Figure 5, in practice process, the testing apparatus of cross-platform network alarm and incident management and the network equipment, NM server, NM client are put in one network, by controlling testing apparatus, reach the test purpose of equipment alarm and the management of event webmaster in the multiple different network environments such as simulated light access network, transmission network.
The present invention is not limited to above-mentioned execution mode, and for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications are also considered as within protection scope of the present invention.The content be not described in detail in this specification belongs to the known prior art of professional and technical personnel in the field.
Claims (10)
1. a testing apparatus for cross-platform network alarm and incident management, is characterized in that: comprise hardware platform and be arranged on SNMP proxy module, administration module, alarm memory module, control module, the operating system on described hardware platform;
Described control module, is responsible for the management of implementation system, coordinates each module, management activity is done to network analysis, optimizes each alarm interface;
Described operating system, is responsible for the testing requirement receiving user's input;
Described administration module, the testing requirement be responsible for user inputs changes into command code;
Described alarm memory module, responsible collection gathers various kinds of equipment alarm, by the mode of programming, alarm code is formed alarm library storage;
SNMP proxy module, is responsible for alarm or reporting events to network management system.
2. the testing apparatus of cross-platform network alarm as claimed in claim 1 and incident management, is characterized in that: described alarm memory module comprises class PON equipment alarm module, class OTN equipment alarm module, class PTN device alarm module, follow-up easily extensible equipment alarm module;
Described class PON equipment alarm module is used for the alarm of PON device type and forms alarm storehouse; The alarm of the newly-increased classification of conversion is preserved to alarm storehouse;
Described class OTN equipment alarm module is used for the alarm of OTN device type and forms alarm storehouse; The alarm that conversion newly increases classification is preserved to alarm storehouse;
Described class PTN device alarm module is used for the alarm of PTN device type and forms alarm storehouse; The alarm that conversion newly increases classification is preserved to alarm storehouse;
Described easily extensible equipment alarm module is used for follow-up newly added equipment type alarm and forms alarm storehouse; The alarm that conversion newly increases classification is preserved to alarm storehouse.
3. the testing apparatus of cross-platform network alarm as claimed in claim 1 and incident management, it is characterized in that: in described administration module, command code is the command code of network management system identifiable design, process.
4., based on the cross-platform network alarm of device described in claim 1 and the method for testing of incident management, it is characterized in that, comprise the following steps:
Step S101. user is by operating system input alarm test demand;
Step S102. control module is retrieved according to described alarm test demand and is transferred respective class equipment alarm in the alarm storehouse of alarm memory module, and notifies administration module;
The equipment alarm testing requirement collected is changed into command code and reports to SNMP proxy module by step S103. administration module;
The command code received is reported to network management system by step S104.SNMP proxy module.
5. the method for testing of cross-platform network alarm as claimed in claim 4 and incident management, it is characterized in that, in step S101, the mode that user inputs alarm test demand comprises:
Chosen needing the alarm parameter of test by the interface of operating system;
The alarm needing to select is write in script, directly imports to operating system by script.
6. the method for testing of cross-platform network alarm as claimed in claim 4 and incident management, it is characterized in that, in step S101, user selects for device type, alarm type, is merged into the compound mode of alarm report.
7. the method for testing of cross-platform network alarm as claimed in claim 4 and incident management, it is characterized in that, in step S103, administration module is that time tag is stamped in the equipment alarm reported, and shows corresponding alarm initial time and end time.
8. a testing apparatus for cross-platform network alarm and incident management, is characterized in that: comprise hardware platform and be arranged on SNMP proxy module, administration module, alarm memory module, control module, operating system, the event memory module on described hardware platform;
Described control module, is responsible for the management of implementation system, coordinates each module, management activity is done to network analysis, optimizes each alarm interface;
Described operating system, is responsible for the testing requirement receiving user's input;
Described administration module, the testing requirement be responsible for user inputs changes into command code;
Described alarm memory module, responsible collection gathers various kinds of equipment alarm, by the mode of programming, alarm code is formed alarm library storage;
SNMP proxy module, is responsible for alarm or reporting events to network management system;
Event memory module, described event memory module is responsible for collecting the event gathering various kinds of equipment, by the mode of programming, event is formed event thesaurus and stores.
9. the testing apparatus of cross-platform network alarm as claimed in claim 8 and incident management, is characterized in that: described event memory module comprises class PON device events module, class OTN device events module, class PTN device event module, follow-up easily extensible device events module;
Described class PON device events module is used for PON device type event and forms event thesaurus; The event that conversion newly increases classification is preserved to event thesaurus;
Described class OTN device events module is used for OTN device type event and forms event thesaurus; The event that conversion newly increases classification is preserved to event thesaurus;
Described class PTN device event module is used for PTN device types of events and forms event thesaurus; The event that conversion newly increases classification is preserved to event thesaurus;
Described easily extensible device events module is used for follow-up newly added equipment types of events and forms event thesaurus; The event that conversion newly increases classification is preserved to event thesaurus.
10., based on the cross-platform network alarm of device described in claim 8 and the method for testing of incident management, it is characterized in that, comprise the following steps:
Step S201. user is by operating system incoming event testing requirement;
Step S202. control module is retrieved according to described event testing requirement and is transferred respective class device events in the event thesaurus of alarm memory module, and notifies administration module;
The device events testing requirement collected is changed into command code and stamps time tag and reports to SNMP proxy module by step S203. administration module;
The command code received is reported to network management system by step S204.SNMP proxy module.
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| CN105656701A (en) * | 2016-04-01 | 2016-06-08 | 浪潮电子信息产业股份有限公司 | Testing method based on Windows system SNMP |
| CN106302012A (en) * | 2016-08-12 | 2017-01-04 | 李纯雅 | A kind of PTN network simulation-optimization method and system |
| CN106302012B (en) * | 2016-08-12 | 2019-03-01 | 李纯雅 | A kind of PTN network simulation-optimization method and system |
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