CN115051920B - Method and system for expanding NFV capacity network element under capacity open architecture - Google Patents
Method and system for expanding NFV capacity network element under capacity open architecture Download PDFInfo
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Abstract
A method and a system for expanding the capacity of an NFV capacity network element under a capacity open architecture, when NFVO takes a certain time as a period, the method and the system start an intelligent capacity expansion flow of the capacity network element at fixed time, comprise the following steps: the NFVO obtains a capability open network element associated with the capability network element; the NFVO generates a capacity expansion plan of the periodic capacity network element according to the service request number S and the refusal request number S' refused by starting overload in the period reported by the capacity opening network element; the NFVO sends the capacity-expanding VDU quantity in the capacity-expanding plan of the capacity network element of the period to the capacity network element; after the capacity expansion of the capacity network element is completed, the NFVO updates the capacity of the capacity network element into the number of VDUs after the capacity expansion, updates the state into the number of VDUs after the capacity expansion is completed, and then notifies the capacity network element of the cooling period parameters in the content of the capacity expansion strategy. The invention belongs to the field of communication, and can realize intelligent capacity expansion of an NFV (network File System) capability network element by monitoring the flow and load conditions of a capability opening network element associated with the capability network element.
Description
Technical Field
The invention relates to a method and a system for expanding capacity of an NFV capacity network element under a capacity open architecture, belonging to the field of communication.
Background
The traditional telecom operators are accelerating to change to IT, and by introducing advanced technologies such as NFV (Network Function Virtualization), network function virtualization, network capability opening and the like, a new generation network which has globally scheduled resources, comprehensively opened capabilities, elastically flexible capacity and flexibly adjustable architecture is constructed, so that multiple targets of cultivating new service growth points, reducing system operation cost, accelerating service development mode innovation and the like are realized.
The following description first introduces the NFV and network capability open networking and functions, and the MANO and network management system is responsible for management of the NFV system, and is composed of NFVO, VNFM, OMC, VIM:
the function of the enhanced NFVO is enhanced compared with the function of the NFVO defined by the ETSI standard. The standard NFVO function mainly comprises the functions of managing network services, managing the life cycle of the virtual network function and uniformly scheduling resources across a resource pool through VNM and VIM; enhanced functionality mainly includes FCAPS management capabilities (VNF, virtual resources, physical resource related configuration, performance, alarms, three-tier alarm association and performance threshold alarm monitoring) for virtual network elements;
the VNFM realizes the life cycle management of the virtual network element VNF, and comprises the management and the processing of the VNFD, the initialization of the VNF instance, the expansion/contraction of the VNF and the termination of the VNF instance, and supports the receiving of the elastic expansion strategy issued by the NFVO to realize the elastic expansion of the VNF;
OMC realizes the management functions of faults, performance, configuration and the like of physical network elements and virtual network element application layers, reports the alarm, configuration and performance data of the VNF application layers to the current network OSS and the NFVO through a northbound interface, and can cooperate with VNM to realize the life cycle management of the virtual network elements;
the VIM is a virtualized infrastructure management system, and is mainly responsible for management, monitoring and fault reporting of infrastructure layer hardware resources, providing a virtualized resource pool for the upper layer VNFM and NFVO, and providing a virtual machine image management function.
The operator network capability open architecture can be generally divided into an application layer, a network capability open platform and a network capability layer from top to bottom. The application layer comprises an operator self application, an industry application and an internet application; the capability opening network element on the network capability opening platform realizes convergence, encapsulation and opening of the communication capability of the current network CS, PS and IMS, which are oriented to the self/non-self application; the capability network element of the network capability layer encapsulates the network capability possessed by the capability network element and provides the capability to the capability opening network element for calling in an interface mode.
With the continuous popularization of NFV technology, the construction of capacity open related network elements based on NFV architecture has become a common practice for operators, and can bring benefits of decoupling software and hardware, reducing purchasing cost of hardware equipment, and flexible expansion and contraction of capacity for operators. The support of the elastic expansion of the network element capacity is one of important advantages of the NFV technology, the processing capacity of the network element can be rapidly improved through capacity expansion when the network element is needed, and the system resource waste is reduced through capacity reduction when the network element is not needed. At present, there are two main modes of elastic expansion and contraction, the first is that operation and maintenance personnel manually execute related operations (i.e. manually expand and contract) through a GUI interface provided by NFVO, and the second is that VNFM automatically executes (i.e. automatically expands and contracts) according to trigger conditions (e.g. CPU reaches a set threshold) specified by a policy file provided by NFVO in advance when a given condition is satisfied.
There are some bursty growing business scenarios (e.g., twenty-one campaigns, bursty marketing, etc.) for various applications of the capability open application layer, especially internet applications. In these scenarios, the number of capability call requests initiated by the application layer to the capability opening layer per second may increase by tens to hundreds of times than usual and be conducted by the capability opening layer to the capability layer. In order to cope with such impact, if the capability network element of the capability layer sets capacity according to the processing capability required by these extreme scenarios, the system will idle, the resource utilization rate will be low, and resource waste will be caused. Therefore, it is necessary to use an elastic capacity expansion and contraction technology for the capacity network element, perform temporary capacity expansion operation to meet capacity requirements before the service impact, and perform capacity contraction operation after the service scenario with sudden growth ends, so as to avoid resource waste.
When the existing automatic capacity expansion and contraction mechanism is used for coping with such a scene, the problem of high service request failure rate in the capacity expansion process can occur, and the user experience is affected. The main reasons for this are the following 3 points:
1. the NFV network element requires a long time (1-10 minutes) for a single expansion and contraction flow. If the number of received requests exceeds the capacity in the capacity expansion process, the network element starts an overload mechanism and continuously refuses the requests exceeding the capacity;
2. the number of the automatic capacity-expansion VDUs of the NFV network element depends on a strategy file configured in advance, so that the size of telephone traffic impact cannot be matched, and multiple capacity-expansion operations need to be executed in series;
3. the failed service request is automatically retransmitted, and the snowball effect further increases the load of the capacity network element, thereby increasing the demand for capacity expansion.
The capacity expansion of the capacity network element layer is finished in advance before the business request impact is achieved by adopting a manual capacity expansion mode, and although the high failure rate in the capacity expansion process is possibly avoided, the accuracy and the instantaneity of the capacity expansion are difficult to meet the requirements due to the fact that the scale and the time period of the business request impact are difficult to predict.
Therefore, how to realize intelligent capacity expansion of NFV capacity network elements, so as to effectively avoid the problem of the current automatic capacity expansion and contraction and manual capacity expansion and contraction mechanism when dealing with suddenly increased service scenes, has become a technical problem of great attention of technicians.
Disclosure of Invention
In view of the above, the present invention aims to provide a method and a system for expanding NFV capacity network elements under a capacity open architecture, which can realize intelligent capacity expansion of NFV capacity network elements by monitoring and analyzing traffic and load conditions of capacity open network elements associated with capacity network elements, so as to effectively avoid problems of current automatic capacity expansion and manual capacity expansion mechanisms when dealing with suddenly increased service scenarios.
In order to achieve the above objective, the present invention provides a method for expanding NFV capability network elements under a capability open architecture, in which a service request is conducted to an associated capability network element through a capability open network element to be processed, both the capability open network element and the capability network element include a virtual network function VNF, a virtualized network function module manager VNFM, and an operation maintenance center OMC, wherein the VNF includes a plurality of VDUs, and when the NFVO periodically starts an intelligent capacity expansion flow for the capability network element with a certain period of time, the method includes:
step one, NFVO obtains a capability opening network element associated with a capability network element;
step two, the NFVO generates a capacity expansion plan of the capacity-releasing network element according to the service request number S and the refusal request number S' refused by starting overload in the period reported by the capacity-releasing network element: whether the capacity is required to be expanded and the number of VDUs are increased;
step three, the NFVO sends the capacity-expanding VDU quantity in the capacity-expanding plan of the capacity network element of the period to the capacity network element, and notifies the capacity network element to expand capacity;
and step four, after the capacity expansion of the capacity network element is completed, the NFVO updates the capacity of the capacity network element into the number of the VDUs after the capacity expansion, updates the state of the VDUs to the capacity expansion, and then notifies the capacity network element of the cooling period parameters in the content of the capacity expansion strategy.
In order to achieve the above objective, the present invention further provides a system for expanding NFV capability network elements under a capability open architecture, where service requests are conducted to associated capability network elements through the capability open network elements for processing, both the capability open network elements and the capability network elements include a virtual network function VNF, a virtualized network function module manager VNFM, and an operation maintenance center OMC, where the VNF includes a plurality of VDUs, and the NFVO further includes:
the intelligent capacity expansion starting device acquires capacity opening network elements associated with the capacity network elements by taking a certain time as a period, and then notifies the intelligent capacity expansion computing device;
the intelligent capacity expansion calculation device generates a capacity expansion plan of the capacity-releasing network element according to the service request number S in the period reported by the capacity-releasing network element and the refusal request number S' refused by starting overload: whether the capacity is required to be expanded and the number of VDUs are increased;
and the capacity expansion notification device is used for sending the capacity expansion VDU quantity to the corresponding capacity network element according to the capacity expansion plan of each period capacity network element generated by the intelligent capacity expansion calculation device so as to notify the capacity network element to expand capacity, updating the capacity of the capacity network element to the capacity-expanded VDU quantity after the capacity expansion of the capacity network element is completed, updating the state of the capacity-expanded VDU quantity to the capacity-expanded VDU quantity, and then notifying the capacity network element to prolong the cooling period parameter in the capacity-shrinking strategy content.
Compared with the prior art, the invention has the beneficial effects that: the capacity expansion method and the capacity expansion device based on the load analysis of the capacity opening network element can make a decision to start capacity expansion of the capacity network element in advance, and can enable the capacity network element to realize linkage with the capacity opening network element, so that the whole capacity expansion time is shortened, and the failure rate of service request impact is obviously reduced.
Drawings
Fig. 1 is a flowchart of a method for expanding NFV capability network elements under a capability open architecture according to the present invention.
Fig. 2 is a schematic diagram of the composition structure of a system for expanding NFV capability network elements under a capability open architecture of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent.
Under the open architecture of the network capacity of an operator, the service request flow is conducted to the capacity network element for processing through the capacity open network element, and when the service request flow increases, if the service flow does not exceed the current capacity of the capacity open network element, the load of the capacity open network element increases synchronously; if the traffic flow exceeds the current capacity of the capability-releasing network element, the capability-releasing network element first starts an overload processing mechanism and refuses to request the capability exceeding the capability of the capability-releasing network element. And simultaneously, as the self load exceeds the threshold specified by the capacity expansion strategy, the capacity expansion flow is started. This expansion process may last for several minutes. Therefore, when the conditions of continuously increasing the load of the capability opening network element, starting overload, starting the capacity expansion flow and the like are met, the capacity expansion analysis flow of the capability network element is started, the cross-network element linkage analysis of the capability network element capacity expansion flow and the capability opening network element is realized based on the relevance of the service flow, the capacity expansion flow of the capability network element is started in advance based on the load and the flow analysis of the capability opening network element, and therefore service request failure generated by the capability network element in the capacity expansion process is reduced.
In the traditional automatic capacity expansion process, whether the capacity expansion of the network element is required is determined by the load of the network element, and the process is simpler. However, since the traffic is not conducted to the capability network element through the capability opening network element, the conventional automatic capacity expansion process cannot be effective. In the invention, the NFVO is required to increase the function of analyzing the network element with affected capacity, and the principle is as follows: the NFVO analyzes the performance data reported by the capacity opening network element, analyzes whether the attribution of the service request number is concentrated in a partial area, calculates in advance the number of VDUs which are required to be expanded and are required to be distributed to the relevant capacity network element in the affected area by the currently received request (including the part rejected by overload) of the capacity opening network element according to the analysis result, then issues an expansion instruction, and finally sets an expansion cooling period for prolonging the network element so as to avoid the automatic capacity expansion of the network element before the flow comes.
As shown in fig. 1, in the method for expanding NFV capability network elements under a capability open architecture, a service request is conducted to an associated capability network element through a capability open network element for processing, the capability open network element is generally deployed in a centralized manner to facilitate access of a third party service platform, the capability network element is deployed in different provinces or regions according to a user attribution and a supported service type, the capability open network element and the capability network element both include a virtual network function VNF, a virtualized network function module manager VNFM and an operation maintenance center OMC, wherein the VNF includes a plurality of VDUs, and when the NFVO starts an intelligent capacity expansion flow of the capability network element at a certain time period, the method includes:
step one, NFVO obtains a capability opening network element associated with a capability network element;
step two, the NFVO judges whether an overload alarm is generated by the capability opening network element in the period, if so, the step five is continued; if not, continuing the next step;
the period of the NFVO is smaller than the length of time required by capacity expansion of the capacity opening network element, and the overload alarm is generated by the capacity opening network element VNF and is reported to the NFVO through the capacity opening network element OMC;
step three, the NFVO judges whether the capacity opening network element in the period generates load acceleration overrun warning, if so, the step five is continued; if not, continuing the next step;
the load acceleration overrun alarm is generated by the capacity opening network element OMC and is used for indicating the continuous increase of the load of the capacity opening network element in a certain past history time;
step four, the NFVO judges whether the capacity-opening network element in the period is started to manually or automatically expand capacity, if so, the step five is continued; if not, the process ends;
when the capability opening network element starts manual capacity expansion, the NFVO sends a ScaleVNF Request message to the capability opening network element VNFM through a C6 interface, and records that the capability opening network element has started manual capacity expansion in the period; when the capability open network element starts automatic capacity expansion, the capability open network element VNFM will send C6 to the NFVO: VNFMEventNotification message to inform NFVO that VNF is about to be automatically expanded, interface includes jobsid information, then NFVO calls C6: the GetJobStatus interface acquires the task state of automatic capacity expansion and records that the capacity opening network element is started to automatically expand capacity in the period;
step five, the NFVO generates a capacity expansion plan of the capacity network element of the period according to the service request number S and the reject request count S' which are rejected due to the starting overload in the period reported by the capacity opening network element: whether the capacity is required to be expanded and the number of VDUs are increased;
the NFVO reads the service request number S and the refusal request number S 'refused by starting overload in the period reported by the capability opening network element, classifies the service requests according to the attribution of the user number in the service requests, further classifies all the service requests under the same attribution according to the service types, converts the service request number under the same attribution into the load L of the capability network element of the attribution according to the load relation of the capability network element corresponding to the service request number of different types configured locally, and calculates the expected load of the capability network element according to the proportion relation of S' and S: l '=l (1+s'/S), and finally generating a capacity expansion plan of the periodic capacity network element according to the expected load and the current capacity of the capacity network element: whether the capacity is required to be expanded and the number of VDUs are increased;
step six, the NFVO compares the capacity expansion plan of the periodic capacity network element with the capacity expansion task in progress of the capacity network element, so as to adjust the capacity expansion plan of the periodic capacity network element: if the capacity expansion task in progress meets the capacity expansion plan of the network element with the capacity of the current period, ending the flow; if the ongoing capacity expansion task can not meet the capacity expansion plan of the network element with the periodic capacity, deleting the ongoing capacity expansion task part in the capacity expansion plan of the network element with the periodic capacity, and then continuing the next step; if the capacity expansion task of the capacity network element in progress is not performed, continuing the next step;
step seven, the NFVO sends the capacity-expanding VDU quantity in the capacity-expanding plan of the capacity network element of the period to the capacity network element, and notifies the capacity network element to expand capacity;
the NFVO sends a ScaleVNF Request message to the capability network element VNFM through a C6 interface according to the number of capacity expansion VDUs in the capacity expansion plan of the capability network element in the period, and then the capacity expansion is completed by the capability network element VNFM;
and step eight, after the capacity expansion of the capacity network element is completed, the NFVO updates the capacity of the capacity network element into the number of the VDUs after the capacity expansion, updates the state of the capacity network element into the number of the VDUs after the capacity expansion, and then notifies the capacity network element to prolong the cooling period parameters in the capacity expansion strategy content so as to avoid capacity expansion failure caused by automatic capacity expansion of the capacity network element in the capacity expansion process.
After the capacity expansion of the VNFM of the capability network element is completed, the NFVO updates the capacity of the capability network element to the number of VDUs after the capacity expansion, updates the state of the VDUs to the number of VDUs after the capacity expansion, and then calls C6: and the UpdatePolicy interface informs the capacity network element of the cooling period parameter in the VNM (virtual network management function) extended capacity reduction strategy content.
As shown in fig. 2, in the system for expanding NFV capability network elements under the capability open architecture of the present invention, service requests are conducted to related capability network elements through capability open network elements for processing, the capability open network elements are generally deployed in a centralized manner to facilitate access of a third party service platform, the capability network elements are deployed in different provinces or regions according to user attribution and supported service types, the capability open network elements and the capability network elements both include a virtual network function VNF, a virtualized network function module manager VNFM and an operation maintenance center OMC, wherein the VNF includes a plurality of VDUs, and the NFVO further includes:
the intelligent capacity expansion starting device acquires capacity opening network elements associated with the capacity network elements by taking a certain time as a period, and then notifies the intelligent capacity expansion computing device;
the intelligent capacity expansion calculation device generates a capacity expansion plan of the capacity-releasing network element according to the service request number S in the period reported by the capacity-releasing network element and the refusal request number S' refused by starting overload: whether the capacity is required to be expanded and the number of VDUs are increased;
and the capacity expansion notification device is used for sending the capacity expansion VDU quantity to the corresponding capacity network element according to the capacity expansion plan of each period capacity network element generated by the intelligent capacity expansion calculation device so as to notify the capacity network element to expand capacity, updating the capacity of the capacity network element to the capacity expansion VDU quantity after the capacity expansion is completed, updating the capacity to the capacity expansion completed state, and notifying the capacity network element to prolong the cooling period parameter in the capacity expansion strategy content so as to avoid capacity expansion failure caused by automatic capacity expansion of the capacity network element in the capacity expansion process.
The intelligent capacity expansion starting device can further comprise:
the capacity expansion starting unit takes a certain time as a period, acquires a capacity opening network element associated with a capacity network element, and then notifies other units in the device to process;
an overload alarm judging unit for judging whether the capability opening network element generates an overload alarm in the period, if so, notifying an intelligent capacity expansion calculating device, wherein the overload alarm is generated by the capability opening network element VNF and is reported to the NFVO through the capability opening network element OMC;
the load acceleration and overrun alarm judging unit judges whether the capacity opening network element generates load acceleration and overrun alarm in the period, if so, the intelligent capacity expansion calculating device is informed, and the load acceleration and overrun alarm is generated by the capacity opening network element OMC and is used for indicating the continuous increase of the load of the capacity opening network element in the past certain history time;
and the capacity expansion start judging unit is used for judging whether the capacity-opening network element in the period is started manually or automatically, and if so, informing the intelligent capacity expansion calculating device.
When the capability opening network element starts manual capacity expansion, the NFVO sends a ScaleVNF Request message to the capability opening network element VNFM through a C6 interface, and records that the capability opening network element has started manual capacity expansion in the period; when the capability open network element starts automatic capacity expansion, the capability open network element VNFM will send C6 to the NFVO: VNFMEventNotification message to inform NFVO that VNF is about to be automatically expanded, interface includes jobsid information, then NFVO calls C6: the GetJobStatus interface obtains the task state of automatic capacity expansion, and records that the capacity opening network element has started automatic capacity expansion in the present period.
The intelligent capacity expansion computing device further comprises:
the capacity expansion plan generating unit reads the service request number S and the refusal request number S 'refused by starting overload in the period reported by the capacity opening network element, classifies the service requests according to the attribution of the user number in the service requests, further classifies all the service requests under the same attribution according to the service types, converts the service request number under the same attribution into the load L of the capacity network element of the attribution according to the load relation of the capacity network element corresponding to the service request number of different types configured locally, and calculates the expected load of the capacity network element according to the proportion relation of S' and S: l '=l (1+s'/S), and finally generating a capacity expansion plan of the periodic capacity network element according to the expected load and the current capacity of the capacity network element: whether the capacity is to be expanded or not and the number of VDUs to be expanded.
The intelligent capacity expansion calculating device also comprises:
the capacity expansion plan adjusting unit compares the capacity expansion plan of the capacity network element per cycle with the capacity expansion task in progress of the capacity network element, so as to adjust the capacity expansion plan of the capacity network element per cycle: deleting the capacity expansion plan of each period of capacity network element if the capacity expansion task in progress meets the capacity expansion plan of the capacity network element of the period; and deleting the part of the expansion task in progress in the capacity expansion plan of the capacity network element of the period when the expansion task in progress cannot meet the capacity expansion plan of the capacity network element of the period.
The capacity expansion notification device sends a ScaleVNF Request message to the capacity network element VNFM through a C6 interface according to the capacity expansion VDU number in the capacity expansion plan of each period of the capacity network element, and then the capacity expansion is completed by the capacity network element VNFM; after capacity expansion is completed by the capacity network element VNFM, the capacity expansion notification device updates the capacity of the capacity network element to the number of VDUs after capacity expansion, updates the state of the capacity network element VNFM to the number of VDUs after capacity expansion, and then calls C6: and the UpdatePolicy interface informs the capacity network element of the cooling period parameter in the VNM (virtual network management function) extended capacity reduction strategy content.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the invention.
Claims (12)
1. The method for expanding the capacity of the NFV capacity network element under the capacity open architecture is characterized in that a service request is conducted to an associated capacity network element through the capacity open network element for processing, the capacity open network element and the capacity network element both comprise a virtual network function VNF, a virtualized network function module manager VNFM and an operation maintenance center OMC, wherein the VNF comprises a plurality of VDUs, and when the NFVO takes a certain time as a period, the method comprises the following steps of:
step one, NFVO obtains a capability opening network element associated with a capability network element;
step two, the NFVO generates a capacity expansion plan of the capacity-releasing network element according to the service request number S and the refusal request number S' refused by starting overload in the period reported by the capacity-releasing network element: whether the capacity is required to be expanded and the number of VDUs are increased;
step three, the NFVO sends the capacity-expanding VDU quantity in the capacity-expanding plan of the capacity network element of the period to the capacity network element, and notifies the capacity network element to expand capacity;
and step four, after the capacity expansion of the capacity network element is completed, the NFVO updates the capacity of the capacity network element into the number of the VDUs after the capacity expansion, updates the state of the VDUs to the capacity expansion, and then notifies the capacity network element of the cooling period parameters in the content of the capacity expansion strategy.
2. The method according to claim 1, wherein between the first step and the second step, there is further included:
step 1, NFVO judges whether overload alarm is generated by the network element capable of being opened in the period, if so, the step two is continued; if not, continuing the next step;
step 2, the NFVO judges whether the capacity opening network element in the period generates load acceleration overrun warning, if so, the step two is continued; if not, continuing the next step;
step 3, the NFVO judges whether the capacity-releasing network element in the period is started to manually or automatically expand capacity, if so, the step two is continued; if not, the process ends.
3. The method according to claim 2, characterized in that in step 3, when the capability opening network element starts manual capacity expansion, NFVO will send a ScaleVNF Request message to the capability opening network element VNFM through the C6 interface, and record that the capability opening network element has started manual capacity expansion in the present period; when the capability open network element starts automatic capacity expansion, the capability open network element VNFM will send C6 to the NFVO: VNFMEventNotification message to inform NFVO that VNF is about to be automatically expanded, interface includes jobsid information, then NFVO calls C6: the GetJobStatus interface obtains the task state of automatic capacity expansion, and records that the capacity opening network element has started automatic capacity expansion in the present period.
4. The method of claim 1, wherein step two further comprises:
the NFVO reads the number S of service requests in the current period and the number S' of refusal requests refused by starting overload reported by the network element, classifies the service requests according to the attribution of the user number in the service requests, and sorts all service requests under the same attribution
The method comprises the steps of solving the problem of further classifying according to service types, converting the service request number under the same attribution into the load L of the capacity network element of the attribution according to the load relation of the capacity network element corresponding to the service request number of different types configured locally, and calculating the expected load of the capacity network element according to the proportional relation of S' and S: l '=l (1+s'/S), and finally generating a capacity expansion plan of the periodic capacity network element according to the expected load and the current capacity of the capacity network element: whether the capacity is to be expanded or not and the number of VDUs to be expanded.
5. The method of claim 1, wherein the second step further comprises:
the NFVO compares the capacity expansion plan of the periodic capacity network element with the capacity expansion task in progress of the capacity network element, thereby adjusting the capacity expansion plan of the periodic capacity network element: if the capacity expansion task in progress meets the capacity expansion plan of the network element with the capacity of the current period, ending the flow; if the capacity expansion task in progress cannot meet the capacity expansion plan of the network element with the periodic capacity, deleting the part of the capacity expansion task in progress in the capacity expansion plan of the network element with the periodic capacity, and continuing the step three; and if the capacity expansion task of the capacity network element in progress is not available, continuing the step three.
6. The method according to claim 1, wherein in step three, NFVO sends, to the capability network element VNFM, a ScaleVNF Request message through a C6 interface from the number of capacity expansion VDUs in the capacity expansion plan of the capability network element, and then the capacity expansion is completed by the capability network element VNFM; in the fourth step, after the capacity expansion of the VNFM of the capability network element is completed, the NFVO updates the capacity of the capability network element to the number of VDUs after the capacity expansion, updates the state of the VDUs to the number of VDUs after the capacity expansion is completed, and then calls C6: and the UpdatePolicy interface informs the capacity network element of the cooling period parameter in the VNM (virtual network management function) extended capacity reduction strategy content.
7. The system for expanding the capacity of the NFV capability network element under the capability open architecture is characterized in that a service request is conducted to an associated capability network element through the capability open network element for processing, the capability open network element and the capability network element both comprise a virtual network function VNF, a virtualized network function module manager VNFM and an operation maintenance center OMC, wherein the VNF comprises a plurality of VDUs, and the NFVO further comprises:
the intelligent capacity expansion starting device acquires capacity opening network elements associated with the capacity network elements by taking a certain time as a period, and then notifies the intelligent capacity expansion computing device;
the intelligent capacity expansion calculation device generates a capacity expansion plan of the capacity-releasing network element according to the service request number S in the period reported by the capacity-releasing network element and the refusal request number S' refused by starting overload: whether the capacity is required to be expanded and the number of VDUs are increased;
and the capacity expansion notification device is used for sending the capacity expansion VDU quantity to the corresponding capacity network element according to the capacity expansion plan of each period capacity network element generated by the intelligent capacity expansion calculation device so as to notify the capacity network element to expand capacity, updating the capacity of the capacity network element to the capacity-expanded VDU quantity after the capacity expansion of the capacity network element is completed, updating the state of the capacity-expanded VDU quantity to the capacity-expanded VDU quantity, and then notifying the capacity network element to prolong the cooling period parameter in the capacity-shrinking strategy content.
8. The system of claim 7, wherein the intelligent capacity expansion initiation device further comprises:
the capacity expansion starting unit is used for acquiring capacity opening network elements associated with the capacity network elements with a certain time as a period and then notifying the overload alarm judging unit;
an overload alarm judging unit for judging whether the overload alarm is generated by the capacity opening network element in the period, if so, informing the intelligent capacity expansion calculating device, and if not, informing the load acceleration overrun alarm judging unit;
the load acceleration rate overrun alarm judging unit is used for judging whether the load acceleration rate overrun alarm is generated by the energy-saving network element in the period, if so, informing the intelligent capacity expansion calculating device, and if not, informing the capacity expansion starting judging unit;
and the capacity expansion start judging unit is used for judging whether the capacity-opening network element in the period is started manually or automatically, and if so, informing the intelligent capacity expansion calculating device.
9. The system of claim 8, wherein when the capability-releasing network element starts manual capacity expansion, the NFVO sends a ScaleVNF Request message to the capability-releasing network element VNFM through the C6 interface, and records that the capability-releasing network element has started manual capacity expansion in the present period; when the capability open network element starts automatic capacity expansion, the capability open network element VNFM will send C6 to the NFVO: VNFMEventNotification message to inform NFVO that VNF is about to be automatically expanded, interface includes jobsid information, then NFVO calls C6: the GetJobStatus interface obtains the task state of automatic capacity expansion, and records that the capacity opening network element has started automatic capacity expansion in the present period.
10. The system of claim 7, wherein the intelligent capacity expansion computing device further comprises:
the capacity expansion plan generating unit reads the service request number S and the refusal request number S 'refused by starting overload in the period reported by the capacity opening network element, classifies the service requests according to the attribution of the user number in the service requests, further classifies all the service requests under the same attribution according to the service types, converts the service request number under the same attribution into the load L of the capacity network element of the attribution according to the load relation of the capacity network element corresponding to the service request number of different types configured locally, and calculates the expected load of the capacity network element according to the proportion relation of S' and S: l '=l (1+s'/S), and finally generating a capacity expansion plan of the periodic capacity network element according to the expected load and the current capacity of the capacity network element: whether the capacity is to be expanded or not and the number of VDUs to be expanded.
11. The system of claim 7, wherein the intelligent capacity expansion computing device further comprises:
the capacity expansion plan adjusting unit compares the capacity expansion plan of the capacity network element per cycle with the capacity expansion task in progress of the capacity network element, so as to adjust the capacity expansion plan of the capacity network element per cycle: deleting the capacity expansion plan of each period of capacity network element if the capacity expansion task in progress meets the capacity expansion plan of the capacity network element of the period; and deleting the part of the expansion task in progress in the capacity expansion plan of the capacity network element of the period when the expansion task in progress cannot meet the capacity expansion plan of the capacity network element of the period.
12. The system according to claim 7, wherein the capacity expansion notification device sends a scalable vnf Request message to the capability network element VNFM through the C6 interface with the number of capacity expansion VDUs in the capacity expansion plan of each period, and then the capacity expansion is completed by the capability network element VNFM; after capacity expansion is completed by the capacity network element VNFM, the capacity expansion notification device updates the capacity of the capacity network element to the number of VDUs after capacity expansion, updates the state of the capacity network element VNFM to the number of VDUs after capacity expansion, and then calls C6: and the UpdatePolicy interface informs the capacity network element of the cooling period parameter in the VNM (virtual network management function) extended capacity reduction strategy content.
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