JP5829230B2 - Management system and management method - Google Patents

Description

  The present invention relates to a management system and a management method included in a mobile communication system.

  2. Description of the Related Art Conventionally, a plurality of types of communication services such as voice communication and mail have been provided in networks of mobile communication systems such as mobile phone networks (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 2002-301212

  In conventional mobile communication systems, allocation of services to be provided is determined for servers and network resources that provide communication services. For example, a server or network resource for voice communication is provided for voice communication, and a server or network resource for mail is provided for mail. These servers and network resources are installed in the network after the amount of equipment is calculated in consideration of the number of requests for each service assumed in advance.

  For this reason, when a large-scale disaster occurs, the number of service requests greatly exceeded. For this reason, the restriction process is performed by the server or the like, and the service request is discarded. As a result, a communication service such as a voice call becomes difficult to connect, and the communication rate of the service decreases.

  For example, immediately after the Great East Japan Earthquake, it is assumed that 50 to 60 times as much traffic has occurred in the mobile communication system as compared to immediately before the earthquake. Thus, at the time of a large-scale disaster, a remarkably large amount of communication demand is generated over a wide range (for example, from Tohoku to Kanto) compared to the normal time. In addition, a sharp increase in demand for voice communication is conspicuous compared to communication such as mail. In other words, during a large-scale disaster, the network becomes too different from the normal time.

  In order to respond to service requests in the event of a large-scale disaster, it is conceivable to install facilities corresponding to the network. However, in this method, the surplus facilities at the normal time become too large, and for example, costs such as communication charges become large. Usually, there is a request from a user to provide a high-quality service at a low cost to the network. As described above, the requirements at the time of a large-scale disaster and the normal time are contradictory, and it is difficult to achieve both.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a management system and a management method that can appropriately provide a communication service even during a large-scale disaster. To do.

In order to achieve the above object, the management system according to the present invention includes one or more virtual servers that generate any one of a plurality of types of communication including voice communication and communications other than voice communication. A management system that is included in a mobile communication system including a physical server and manages the virtual server, and a request amount detection unit that detects a request amount of communication processing for each type of communication in the virtual server; For communication of a type set as a preferential type among a plurality of types, detected by the rated processing number indicating the processing capability of the virtual server that executes the communication processing of the type stored in advance and the request amount detection unit minimum from the demand, by calculating the rate at which the processing rate of the treated requested among the requests communication processing input to the virtual server, a preset and calculated treatment rate By comparing the physical index, a processing rate determining means for determining whether or not the communication processing of the minimum processing rate possible for the demand, is determined by the processing rate determining means, it is detected by the request detecting means If communication processing with the minimum processing rate is not possible for the requested amount, calculate the resources that are insufficient to enable communication processing with the minimum processing rate for the requested amount. Virtual server generation means for executing, on the physical server, a virtual server corresponding to the calculated resource while executing communication processing of the type set as the priority type.

  According to the management system of the present invention, a huge number of communication processes occur due to a large-scale disaster, and a communication process with a processing rate (communication rate) set in advance for a type of communication set as a priority type. When it is no longer possible, a virtual server that newly executes the type of communication processing can be generated on the physical server. Therefore, according to the management system according to the present invention, it is possible to appropriately provide a communication service even during a large-scale disaster.

  The type of communication set as the priority type may be at least one of voice communication and mail. According to this configuration, it is possible to appropriately provide a communication service for at least one of voice communication and mail, which are important communication means in a large-scale disaster.

  The virtual server generation means assigns a virtual server that executes a communication process of a type not set as a priority type to a virtual server that executes a communication process of a type set as a priority type. It is good also as producing | generating on a physical server. According to this configuration, a virtual server that executes a type of communication process that is not normally set as a priority type can be assigned to a type of communication that becomes an important communication means during a large-scale disaster. Therefore, efficient use of resources and reliable preferential communication during a disaster can be ensured.

  By the way, the present invention can be described as the invention of the management system as described below, in addition to the invention of the management system as described above. This is substantially the same invention only in different categories, and has the same operations and effects.

In other words, the management method according to the present invention is configured to include one or more physical servers in which a virtual server that executes any one of a plurality of types of communications including voice communications and communications other than voice communications is generated. A management method for managing the virtual server, which is an operation method of the management system that is included in the mobile communication system and manages the virtual server, and detects a request amount of communication processing for each type of communication in the virtual server Request amount detection step to be performed, and for a type of communication set as a preferential type among a plurality of types, the number of requests and the rated processing number indicating the processing capability of the virtual server that executes the communication processing of the type stored in advance from the detected required amount in an amount detection step calculates the processing rate is the rate of requests processed among the requests communication processing input to the virtual server, calculated By comparing the the treatment rate and a preset minimum treatment rate, and the processing rate determining step of the communication processing of the minimum processing rate can determines whether against the demand, determined in the process rate determining step However, if communication processing at the minimum processing rate is not possible for the request amount detected in the request amount detection step, communication processing at the minimum processing rate can be performed for the request amount. A virtual server generation step of calculating a resource that is insufficient , executing a communication process of a type set as a priority type, and generating a virtual server corresponding to the calculated resource on the physical server.

  According to the present invention, an enormous number of communication processes occur due to a large-scale disaster, and a communication process with a preset processing rate (communication rate) cannot be performed for a type of communication set as a priority type. In this case, a virtual server that newly executes the type of communication processing can be generated on the physical server. Therefore, according to the present invention, it is possible to appropriately provide a communication service even during a large-scale disaster.

It is a figure which shows the function structure of the management system which concerns on embodiment of this invention, and the mobile communication system containing the said management system. It is a resource management table which stores the information for managing the request amount of the communication processing for every virtual server in a management system. 5 is a service management table that stores information for managing the amount of communication processing required for each type of communication in the management system. It is a condition table which stores the information for implement | achieving the function which concerns on embodiment in a management system. It is a resource management table when the service request increases at the time of a large-scale disaster. It is a service management table when a service request increases at the time of a large-scale disaster. It is the figure which showed notionally the allocation change of the virtual server. It is a resource management table when allocation change is performed. It is a service management table when allocation change is performed. It is a figure which shows the hardware constitutions of the management system which concerns on embodiment of this invention. It is a flowchart which shows the process (management method) performed with the management system which concerns on embodiment of this invention.

  Hereinafter, embodiments of a management system and a management method according to the present invention will be described in detail with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. Further, in the present embodiment, a numerical example is shown for easy explanation, but this does not necessarily match the actual value.

  FIG. 1 shows a configuration of a mobile communication system 1 including a management system 10 according to the present embodiment. The mobile communication system 1 is a system that provides a mobile communication function to a mobile communication terminal (mobile device) (not shown). A mobile communication terminal is a device that is used by a user to connect to a mobile communication system (mobile communication network) by wireless communication and perform mobile communication. Specifically, the mobile communication terminal corresponds to a mobile phone or the like. For example, the mobile communication terminal establishes a call connection with the opposite node via the mobile communication system 1 and performs communication. The opposite node is, for example, another mobile communication terminal, a server device that provides various services to the mobile communication terminal, or a device (for example, MME (Mobility Management Entity), S-GW ( Serving Gateway), P-GW (PDN Gateway)) and the like. The mobile communication terminal can perform mobile communication by, for example, a user of the mobile communication terminal making a contract with a communication carrier of the mobile communication system 1. The mobile communication terminal may be the same as a conventional mobile communication terminal.

  The mobile communication system 1 provides a plurality of types of communication (communication services) to a mobile communication terminal. The communication (communication service) is specifically communication other than voice communication (voice telephone) and voice communication. Voice communication is performed by, for example, IMS (IP Multimedia Subsystem). Examples of communications other than voice communications include communications for sending and receiving emails and moving images (rich media). For example, EPC (Evolved Packet Core) is used for communication related to mail and moving images.

  As shown in FIG. 1, the mobile communication system 1 includes a management system 10, one or more (or a plurality) physical servers (physical machines, PM) 20, and an OpenFlow network 30. These configurations 10, 20, and 30 constitute a core network of the mobile communication system 1 (mobile communication network).

  The physical server 20 is a physical device that performs communication processing in the mobile communication system 1. The communication process is a call process when the communication to be performed is voice communication. Call processing is, for example, processing related to call connection between a mobile communication terminal and an opposite node for voice communication. Specifically, call processing between the mobile communication terminal and an opposite node (both communication session connection) For example, a process for establishing or disconnecting. The communication process is a process of relaying mail between the mobile communication terminal and the opposite node when the communication to be performed is mail. In addition, the communication process is a process of relaying the moving image or the like between the mobile communication terminal and the opposite node when the communication to be performed is to transmit / receive a moving image or the like (in the case of rich media communication). Further, the communication process may include an arbitrary process related to mobile communication other than the process described above.

  The communication process is actually executed by a virtual server (VM: Virtual Machine) 21 realized by the physical server 20. As shown in FIG. 1, the physical server 20 is connected to the mobile communication terminal and the opposite node via the OpenFlow network 30 so that information can be transmitted and received. The mobile communication system 1 includes one or more (or a plurality) physical servers 20. Also, a plurality of physical servers 20 may be connected so that information can be transmitted and received between the physical servers 20. As shown in FIG. 1, a base (a location such as a data center) 2 may be provided, and one or more physical servers 20 may be provided at the base 2.

  The virtual server 21 is a virtual communication processing node that performs communication processing. The virtual server 21 is realized in any one of the physical servers 20. The virtual server 21 uses, for example, virtual machine (VM) technology, a core (processor, CPU) included in the physical server 20 is allocated for the virtual server 21, and a program is executed on the allocated core. Is realized. A plurality of virtual servers 21 can be realized on one physical server 20. For example, when four cores are included in one physical server 20 as shown in FIG. 1, two virtual servers 21 can be realized by allocating two cores to one virtual server 21. In the example illustrated in FIG. 1, “VM1” and “VM2”, “VM3” and “VM4”, and “VM5” and “VM5” are displayed on the “# 1”, “# 2”, and “# 3” physical servers 20. A virtual server 21 of VM6 ″ is realized.

  The mobile communication system 1 includes one or more (or a plurality) virtual servers 21. The virtual server 21 corresponds to a node such as CSCF (Call Session Control Function) or AS (Application Server) in IMS. Alternatively, the virtual server 21 is, for example, a GPRS (General Packet Radio Service) system which is one of mobile communication systems, for example, an SGSN (Serving GPRS Support Node), or an LTE / EPC (Long Term Evolution / Evolved Packet Core) system, an MME (Mobility). It corresponds to a node such as Management Entity) or S-GW (Serving Gateway).

  Each virtual server 21 is configured to perform communication processing according to the type of communication. For example, it is configured to perform any one of communication processing related to voice communication, communication processing related to mail, and communication processing related to moving images. Specifically, the above configuration is realized by executing a program for performing these types of communication processing in the virtual server 21. For example, in the example of FIG. 1, “VM1” virtual server 21 performs communication processing related to voice communication by IMS, and “VM2” virtual server 21 performs communication processing related to mail by EPC from “VM3” to “VM6”. The virtual server 21 is configured to execute communication processing related to a moving image by EPC. Note that the communication processing related to the moving image may include communication processing related to other than the moving image.

  By replacing the program executed in the virtual server 21, communication processing according to another type can be performed. For example, the virtual server 21 of “VM3” can be changed from one that performs communication processing related to moving images by EPC to one that performs communication processing related to voice communication by IMS. Normally, when the type of communication processing is different, the signal flow is also different. For this reason, when the type of communication processing executed in the virtual server 21 is changed, the flow of signals input to and output from the virtual server 21 in the core network including the OpenFlow network 30 is also changed as appropriate. The change of the type of communication for performing communication processing in the virtual server 21 is performed by the management system 10 as described later, for example.

  The virtual server 21 performs communication processing triggered by receiving a request (service request, communication request, traffic request) from a mobile communication terminal. This request is, for example, a transmission request (call connection establishment request) or a mail transmission / reception request. The virtual server 21 refers to the information included in the request from the mobile communication terminal as necessary during communication processing. Further, the virtual server 21 refers to or writes, as necessary, a database included in the mobile communication system 1 in which subscriber profiles and location registration information of mobile communication terminals are stored during communication processing. When there are a plurality of virtual servers 21 that perform communication processing of the same type of communication, one of the virtual servers 21 is selected in the mobile communication system 1 and a request is transmitted. The selection of the virtual server 21 (request distribution) is performed by the OpenFlow network 30 so that the load on the virtual server 21 is as uniform as possible, for example.

  The virtual server 21 has a processing capability according to the physical server 20, the number of allocated cores, and the like. For example, the virtual server 21 to which 2 cores are allocated in the physical server 20 has a service of 80,000 for voice communication, 160,000 for mail, and 40,000 for video per certain time (for example, one hour). Communication processing can be performed for the request. This value is the rated processing number, and is a value that can be processed when the CPU usage rate is approximately 80%. Normally, when the CPU usage rate approaches 100%, the virtual server 21 may not operate normally, so a certain CPU usage rate (80% in the above example) is set to the upper limit. When the CPU usage rate exceeds 80%, regulation (control) is performed so that further communication processing is not performed. This regulation may be performed by the virtual server 21 itself or may be performed by the management system 10.

  Normally, the number of physical servers 20 and the number of virtual servers 21 provided in the physical server 20 are assumed to be the number of service requests for each type of communication that occurs in a normal time (when no large-scale disaster occurs). Is decided. However, when a disaster occurs, a service request exceeding the assumed number of service requests may be input to the virtual server 21. When a service request equal to or greater than the rated processing number is input to the virtual server 21, the virtual server 21 discards service requests that exceed the rated processing number. In this case, since all communication processes are not performed for the number of requests input to the virtual server 21, communication that is the rate (ratio) of service requests processed (communication) among the input service requests. The rate (completion rate, processing rate) decreases. That is, it becomes difficult to connect services.

  The OpenFlow network 30 is a flow control network that is connected to the management system 10, the physical server 20, a mobile communication terminal (not shown), and an opposite node, and constitutes a communication path between these devices. Normally, the OpenFlow network 30 and the mobile communication terminal are connected via a base station or a radio network controller (RNC). The OpenFlow network 30 includes a plurality of nodes 31 that are OpenFlow switches connected to each other. The node 31 corresponds to a device normally used as an open flow switch (SW) of an open flow network. As will be described later, the OpenFlow network 30 transmits and receives information under the control of the OpenFlow controller of the management system 10. Specifically, each node 31 of the OpenFlow network 30 receives from the management system 10 a flow entry indicating to which node the information received by the node 31 is transmitted, and transmits / receives information according to the flow entry. Do. In this description, an open flow network will be described. However, a network called SDN (Softwarer difined network) that performs similar flow control and flow transfer processing according to the control may be used.

  Subsequently, the management system 10 according to the present embodiment will be described. The management system 10 is a control node that controls the realization (implementation) of the virtual server 21 on the physical server 20 as a function according to the present embodiment. More specifically, the management system 10 performs control to change the type of communication processing by the virtual server 21. Further, the management system 10 controls transmission / reception of information in the OpenFlow network 30 as a function accompanying the present embodiment. Control of information transmission / reception in the management system 10 is performed by, for example, an OpenFlow controller that performs load distribution control and the like provided in the management system 10. Specific control to be performed will be described later. The management system 10 is connected to each of the physical servers 20 and can send and receive information.

  The management system 10 constitutes a network management control system. The network management control system has functions of network operation policy, network operation / control scenario, network resource management, network topology management, network topology change, network resource control, virtual server control, and flow control. The network operation policy is based on the criteria (congestion, failure, etc.) grasped by the network resource management, and criteria for determining how to control the network (quality conditions related to services, bandwidth to be secured, etc.) It is a function to hold. The network operation / control scenario is a function that refers to the network resource operation policy and provides a control procedure for changing the state grasped by the network management into a state satisfying the policy. Network resource management is a function for receiving and grasping information from servers, switches, and the like deployed in a network.

  The network topology management is a function for grasping and managing the device connection status in the network from the information grasped by the network resource management. The network topology change is a function for changing the device connection state of the network by controlling the placement / movement of the virtual machine of the virtualization server and setting change control of a switch or the like. Network resource control is virtual machine placement / migration control and switch setting change control of the virtualization server. The virtual server control is a function for receiving server information from a virtualization server (same as a physical server) and grasping the state of the server (CPU usage rate, presence / absence of failure, etc.). The flow control is a function for performing flow control of the open flow network 30. The management system 10 according to the present embodiment uses the above function.

  As shown in FIG. 1, the management system 10 includes a request amount detection unit 11, a processing rate determination unit 12, and a virtual server generation unit 13.

  The request amount detection unit 11 is request amount detection means for detecting a request amount of communication processing for each type of communication in the virtual server 21. The request amount detection unit 11 detects the request amount of communication processing in the virtual server 21 for each type such as voice communication, mail, and moving image. Specifically, each virtual server 21 notifies the management system 10 of the number of requests input to itself every fixed time (for example, every hour). The request amount detection unit 11 receives the notification from the virtual server 21 to detect the number of requests in each virtual server 21 as the request amount per fixed time. In the management system 10, which virtual server 21 performs communication processing of which type of communication is known in advance.

  In the management system 10, information detected by the request amount detection unit 11 is stored and managed by the resource management table shown in FIG. As shown in FIG. 2, in the resource management table, “physical server”, “virtual server”, “allocation amount”, “service”, “CPU usage rate”, “number of requests / hour”, and “communication rate (completion rate)” Are stored in association with each other. The “physical server” is information that identifies the physical server 20 on which the virtual server 21 is realized, and is, for example, an ID uniquely assigned to each physical server 20. The “virtual server” is information that identifies the virtual server 21, and is, for example, an ID uniquely assigned to each virtual server 21. When a plurality of virtual servers 21 are assigned to one physical server 20, information on a plurality of “virtual servers” is associated with information on one “physical server” accordingly.

  The “allocation amount” is the number of allocations allocated to the virtual server 21 among the cores provided in the physical server 20. In the example of FIG. 2, 2 cores are allocated to each virtual server 21. In the “allocation amount”, a value corresponding to the core allocation to the virtual server 21 is input in advance. “Service” is information indicating the type of communication with which the virtual server 21 performs communication processing. For example, it is information indicating voice (voice communication), mail, and moving image. In “Service”, information corresponding to the virtual server 21 is input in advance.

  The “CPU usage rate” is a value indicating the rate (ratio) that the virtual server 21 uses in the allocated core capacity. Regarding the information indicating “CPU usage rate”, for example, each physical server 20 or each virtual server 21 itself detects the usage rate of the core and notifies the management system 10 of it. This detection and notification may be performed at the same timing as the notification of the number of service requests. The management system 10 receives the notification and stores information related to the notification in the table shown in FIG.

  “Number of requests / hour” is the number of service requests per fixed time related to the virtual server 21 detected by the request amount detection unit 11. The virtual server 21 stores the detected value for each virtual server 21. The “communication rate (completion rate)” is a value indicating the rate (ratio) of processed (communication) service requests out of the service requests input to the virtual server 21. More details will be described later.

  The request amount detection unit 11 calculates the number of requests for each type of communication (service) from the number of requests of each virtual server 21 detected as described above. In the management system 10, the information calculated by the request amount detection unit 11 is stored and managed by the service management table shown in FIG. As shown in FIG. 3, in the service management table, “service”, “resource allocation amount (overall)”, “rated processing number (overall)”, “number of service requests (overall)”, and “communication rate (overall average)” Are stored in association with each other. “Service” is information indicating the type of communication with which the virtual server 21 performs communication processing, and corresponds to “service” in the resource management table. In the service management table, information is stored for each “service”. That is, as shown in FIG. 3, each piece of information is stored for each piece of information indicating voice, mail, and moving image. The “resource allocation number” is the allocation number allocated to the virtual server 21 that performs communication processing of the type of communication indicated by “service” among the cores provided in the physical server 20. This value is the sum of “allocation” for each “service” in the resource management table.

  The “rated processing number (overall)” is a value indicating the processing capacity of the virtual server 21 (overall) for communication processing of the type of communication indicated by “service”. For example, the number of requests that can be processed per fixed time. The “number of service requests (whole)” is the number of service requests per fixed time for each type indicated by “service”. The request amount detection unit 11 calculates the number of communication requests for each type by taking the sum for each type of the detected value of the number of requests related to each virtual server 21. The request amount detection unit 11 stores the calculated value for each type. “Communication rate (overall average)” is a value indicating a rate (ratio) for each type of service requests processed (communication) among the service requests input to the virtual server 21.

  For example, when a notification is made from each virtual server 21, the request amount detection unit 11 determines “number of requests / hour” in the resource management table and “number of service requests (whole)” in the service management table based on information related to the notification ”Column value is updated. In addition, the “CPU usage rate” in the resource management table may be updated. Note that the value detected or calculated by the request amount detection unit 11 is not necessarily acquired by the above-described method, and may be acquired by any method that can be used in the related art or the like.

  The processing rate determination unit 12 sets a processing rate that is set in advance for the request amount detected by the request amount detection unit 11 for a type of communication that is set as a preferential type among a plurality of types of communication processing. It is a processing rate determination means for determining whether or not the communication process is possible. The processing rate determination unit 12 makes this determination based on the processing capability of the virtual server 21 that executes the type of communication processing stored in advance. The preferential type is a type of communication that should be preferentially processed during a disaster.

  For example, important communication such as safety confirmation is performed by voice communication or e-mail. On the other hand, video communication is not always necessary in the event of a disaster, and it is less important than voice communication or email. Therefore, the priority type is preferably voice communication and mail. Both of these may be preferential types, or only one of them may be preferential types. In the present embodiment, a description will be given assuming that both voice communication and mail are set as the priority types. The priority type is preset by, for example, a telecommunications carrier who is an administrator of the mobile communication system 1, and information indicating the type is input to the management system 10.

  The minimum communication rate is set for the communication of the priority type and the set type. The minimum communication rate is a processing rate of a service request that should be processed at least with respect to a communication processing service request generated in the mobile communication system 1, that is, a communication processing service request input to the virtual server 21 ( Ratio). The minimum communication rate is set in advance by, for example, a communication carrier who is an administrator of the mobile communication system 1, and information (value) indicating the minimum communication rate is input to the management system 10.

  In order to make a determination in the processing rate determination unit 12, the management system 10 stores information in the condition table shown in FIG. As shown in FIG. 4, in the condition table, information indicating “service”, “priority”, “minimum communication rate”, and “rated processing number / 2 cores” is stored in association with each other.

  “Service” is information indicating the type of communication with which the virtual server 21 performs communication processing, and corresponds to “service” in the resource management table and the service management table. In the condition table, information is stored for each “service”. That is, as shown in FIG. 4, each piece of information is stored for each piece of information indicating voice, mail, and moving image. “Priority” is information indicating whether the type indicated by “service” is a priority type or a non-priority type.

  The “minimum communication rate” is the above-described minimum communication rate set for the priority type of communication. For example, the minimum communication rate is 25% (1 call for 4 calls). “Rated processing number / 2 cores” is the rated processing number in the virtual server 21 when two cores of the physical server 20 are allocated. The rated processing number is a value indicating the processing capacity of the virtual server 21 as described above. As described above, the rated processing number is a value that differs for each type of communication according to the physical server 20, the number of assigned cores, and the like. The number of rated treatments is a value per fixed time (for example, 1 hour).

  The processing rate determination unit 12 determines the communication rate for each communication type (service) from the value of “rated processing number (overall)” and the value of “number of service requests (overall)” in the service management table shown in FIG. ("Communication rate (overall average)" in the service management table) is calculated. The processing rate determination unit 12 determines whether the value of “number of service requests (total)” is equal to or less than the value of “rated processing number (total)”. If the value of “number of service requests (overall)” is equal to or less than the value of “rated processing number (overall)”, the processing rate determination unit 12 sets the communication rate to 100%. When the value of “number of service requests (overall)” exceeds the value of “rated processing number (overall)”, a service request to be discarded is generated, and the communication rate decreases from 100%. In this case, the processing rate determination unit 12 calculates the communication rate by dividing the value of “number of service requests (overall)” by “number of rated processing (overall)”.

  At this time, the processing rate determination unit 12 determines not only the “communication rate (overall average)” value in the service management table shown in FIG. 3 but also the “communication rate (completed) of each virtual server 21 in the resource management table shown in FIG. Rate) "may be calculated. The calculation method in this case is the same as the communication rate calculation method for each service. In this case, the value of “rated processing number / 2 cores” in the condition table shown in FIG. 4 can be used as the rated processing number of each virtual server 21.

  Subsequently, for the type set as the priority type, the processing rate determination unit 12 compares the calculated communication rate for each communication type (service) with the “minimum communication rate” in the condition table shown in FIG. 4. . As a result of the comparison, if the processing rate determination unit 12 determines that the calculated communication rate is smaller than the minimum communication rate, the processing rate determination unit 12 notifies the virtual server generation unit 13 to that effect. If it is determined that the calculated communication rate is not smaller than the minimum communication rate, no special processing is required.

  The number of service requests input to each virtual server 21 is as in the resource management table shown in FIG. 2, and the number of service requests for each communication type (service) is as in the service management table shown in FIG. In the case of a situation, the communication rate for all types is 100%. In this case, the processing rate determination unit 12 determines that the calculated communication rate is higher than 25%, which is the lowest communication rate, for voice and mail that are preferential types.

  On the other hand, the number of service requests input to each virtual server 21 is as shown in the resource management table shown in FIG. 5, and the number of service requests for each type of communication (service) is shown in the service management table shown in FIG. It is assumed that the situation is as follows. This is a case where a large-scale disaster occurs, resulting in a dramatic increase in voice communication and mail, resulting in an abnormal increase in service requests. As shown in FIG. 5, the number of requests per hour for voice communication is 960,000, which is 50 times the normal number. In addition, the number of mail requests per hour is 1.28 million, which is about 21 times the normal number. In this example, since there is one virtual server 21 allocated to voice communication and mail, the communication rate is 8% and 12.5%, respectively, as shown in FIGS. Become. In this way, the communication rate of voice communication and mail, which are preferential types, is reduced. In this case, the virtual server 21 performs communication processing of the rated processing number, and the CPU usage rate is 80% corresponding to the rated processing number. Further, the virtual server 21 is regulated so that the communication processing exceeding the rated processing number is not performed so that the CPU usage rate does not exceed 80%.

  In this case, the processing rate determination unit 12 determines that the calculated communication rate is lower than 25%, which is the lowest communication rate, for voice and mail that are preferential types, and notifies the virtual server generation unit 13 to that effect. To do. In other words, the processing rate determination unit 12 detects that the communication rate for the priority service is lower than the minimum communication rate.

  For example, when the request amount detection unit 11 updates the resource management table and the service management table, the processing rate determination unit 12 calculates the communication rate and compares it with the minimum communication rate. Further, the processing rate determination unit 12 may calculate the communication rate and compare it with the minimum communication rate at predetermined intervals.

  The virtual server generation unit 13 is a virtual server generation unit that generates, on the physical server 20, a virtual server 21 that executes communication processing of a type set as a priority type based on the determination by the processing rate determination unit 12. . Specifically, the virtual server generation unit 13 performs the following processing. When the virtual server generation unit 13 is notified that the communication rate is lower than the minimum communication rate from the processing rate determination unit 12 for voice and mail that are preferential types, the virtual server generation unit 13 achieves the minimum communication rate as follows. The amount of insufficient resources necessary for this is calculated. Here, the number of resources is calculated by the number of cores of the physical server 20.

  The virtual server generation unit 13 acquires the value of “number of service requests (whole)” indicating the number of communication processing requests to be processed from the service management table for the target type of communication. In addition, for the target type of communication, the values of “resource allocation amount (whole)”, “minimum communication rate”, and “rated processing number / 2 cores” are acquired from the condition table. The virtual server generation unit 13 is necessary to achieve the minimum communication rate by dividing the value of “number of service requests (whole)” by the value of “rated processing number / 2 cores” and multiplying by the “minimum communication rate”. Calculate the required number of resources. The virtual server generation unit 13 calculates a shortage resource by subtracting “resource allocation amount (total)” that is the current resource number from the calculated necessary resource number.

  In the case of the condition table shown in FIG. 4 and the service management table shown in FIG. 6, in the example of voice communication, required resource = (960,000 ÷ 80,000 (2 core rating) = 24 cores) × 25% = 6 cores. Also, it is calculated that insufficient resources = (necessary resources) 6 cores- (current resources) 2 cores = (insufficient) 4 cores. In addition, when the shortage resource is less than the unit assigned to the virtual server 21 (2 cores in the example of the present embodiment), the virtual resource may be moved up so as to become the unit.

  The virtual server generation unit 13 allocates the insufficient resources calculated as described above from the resources allocated to the non-priority type communication processing. In the example of the present embodiment, since the type of moving image is a non-priority type, the resource of the virtual server 21 that performs communication processing of the moving image type is allocated to a voice or mail resource. In the case of the condition table shown in FIG. 4 and the service management table shown in FIG. 6, the voice resource has four cores and the mail resource has two cores. Since the resources allocated to the moving image are 8 cores, voice and mail shortage resources are allocated from the resources.

  The virtual server generation unit 13 dynamically assigns (changes) the virtual server 21 that executes the communication process related to the moving image to the virtual server 21 that executes the communication process related to the voice communication or the mail, so that the voice communication or the mail is performed. The virtual server 21 that executes the communication process according to the above is generated on the physical server 20. The above assignment change is realized, for example, by changing a program executed on the physical server 20 (a program for executing communication processing). This program may be transmitted from the virtual server generation unit 13 of the management system 10 to the physical server 20 and executed when the allocation is changed. Alternatively, a plurality of types of programs are stored in advance on the physical server 20, and a program for executing communication processing related to a moving image that has been executed until then is controlled by the virtual server generation unit 13 of the management system 10. It is good also as stopping and making the program for performing the communication processing which concerns on a voice communication or an e-mail run. Note that the method of changing the assignment is not limited to the above method, and may be performed by any method that can be used in the prior art or the like.

  When the allocation change is performed as described above, for example, as illustrated in FIG. 7, the virtual server 21 of “VM3” and “VM4” realized in the physical server 20 of “# 2” performs communication processing related to the moving image. Is changed to one that performs communication processing related to voice communication by IMS. Further, the virtual server 21 of “VM5” realized in the physical server 20 of “# 3” is changed from one that performs communication processing related to moving images to one that performs communication processing related to mail by EPC.

  Further, the virtual server generation unit 13 performs control such that signals are appropriately processed in the core network of the mobile communication system 1 in accordance with the change in the allocation of the virtual server 21 described above. For example, control is performed so that a request for communication processing related to a moving image is not input to the virtual server 21 that has been changed from a virtual server 21 that performs communication processing related to a moving image to one that performs another communication processing. In addition, control is performed so that the communication processing related to voice communication or mail is input to the virtual server 21 which is supposed to newly perform communication processing related to voice communication or mail. These controls are performed, for example, by changing the flow entry of the OpenFlow network 30.

  As a result of these changes by the virtual server generation unit 13, the minimum communication rate set in the condition table for voice and mail that are preferential types such as the resource management table shown in FIG. 8 and the service management table shown in FIG. Is realized.

  Further, the virtual server generation unit 13 changes the allocation as described above, and then changes to the configuration of the normal virtual server 21 (sound: 1, mail: 1, movie: 4) as shown in FIG. Even if it is returned, it is also possible to detect that the lowest communication rate is realized for voice and mail that are preferential types, and to return to the normal configuration of the virtual server 21. The functional configuration of the management system 10 according to the present embodiment has been described above.

  FIG. 10 shows a hardware configuration of a server device that configures the management system 10 according to the present embodiment. As shown in FIG. 10, the server device includes a CPU 101, a RAM (Random Access Memory) 102 and a ROM (Read Only Memory) 103, which are main storage devices, a communication module 104 for communication, and an auxiliary storage device 105 such as a hard disk. It is comprised as what contains a computer provided with hardware, such as. The functions of the management system 10 described above are exhibited when these components are operated by a program or the like. The management system 10 may be configured by a computer system including a plurality of server devices. The physical server 20 and the node 31 of the OpenFlow network 30 are also realized by the server device having the above hardware configuration. The above is the configuration of the management system 10 according to the present embodiment.

  Subsequently, a management method, which is a process executed by the management system 10 according to the present embodiment, will be described using the flowchart of FIG. In the management system 10, the request amount detection unit 11 detects the request amount of communication processing for each type of communication in the virtual server 21 (S01, request amount detection step). As described above, for example, the number of requests per time is detected for each service type such as voice communication, mail, and video as the request amount. Information indicating the request amount detected by the request amount detection unit 11 is stored in a resource management table and a service management table managed by the management system 10.

  Subsequently, the processing rate determination unit 12 performs communication processing on the request amount detected by the request amount detection unit 11 for communication of a type set in advance as a priority type among a plurality of types of communication processing. A communication rate, which is a rate to be performed, is calculated (S02, processing rate determination step). As described above, the communication that is the priority type is, for example, voice communication or mail. As described above, the communication rate is calculated based on the rated processing number.

  Subsequently, the processing rate determination unit 12 determines whether or not the calculated communication rate is equal to or higher than a minimum communication rate that is a preset processing rate (S03, processing rate determination step). That is, it is determined whether or not communication processing at a processing rate (minimum communication rate) set in advance for the detected request amount is possible for the communication of the type set as the priority type. When it is determined that the calculated communication rate is equal to or higher than the minimum communication rate (YES in S03), this process ends.

  When it is determined that the calculated communication rate is not equal to or greater than the minimum communication rate (the communication rate is smaller than the minimum communication rate) (NO in S03), the processing rate determination unit 12 notifies the virtual server generation unit 13 to that effect. Is done. Subsequently, the virtual server generation unit 13 generates the virtual server 21 on the physical server 20 so that the communication rate is equal to or higher than the minimum communication rate for the type whose communication rate is not equal to or higher than the minimum communication rate (S04, virtual Server generation step). The generation of the virtual server 21 is performed by changing the assignment of the virtual server 21 related to the non-priority type communication process to the virtual server related to the communication process set as the priority type. By this allocation change, a communication rate that is equal to or higher than the minimum communication rate is realized in the communication classified as a priority type. The above is the management method that is the process executed by the management system 10 according to the present embodiment.

  As described above, according to the present embodiment, a huge number of communication processes occur due to a large-scale disaster, and a communication process with a preset minimum communication rate is possible for a type of communication set as a priority type. In such a case, the virtual server 21 that newly executes the communication process of the type can be generated on the physical server 20 so that the communication process with the lowest communication rate can be performed. Therefore, according to this embodiment, it is possible to provide a communication service appropriately even during a large-scale disaster.

  Further, as in the present embodiment, voice communication and mail can be set as preferential communication. According to this configuration, it is possible to appropriately provide a communication service for voice communication and mail, which are important communication means at the time of a large-scale disaster.

  Further, the virtual server 21 that performs non-priority moving image communication processing as in the present embodiment can be switched to the virtual server 21 that performs voice communication or mail communication processing. By changing the allocation flexibly in this way, a virtual server that executes communication processing of a type that is not normally set as a priority type is allocated to a type of communication that becomes an important communication means in a large-scale disaster. be able to. Therefore, efficient use of resources and reliable preferential communication during a disaster can be ensured. In other words, since it is not necessary to prepare a resource that enables a large number of communication processes even during normal times for the priority types, it is possible to maximize the connection while satisfying economic rationality.

  DESCRIPTION OF SYMBOLS 1 ... Mobile communication system, 2 ... Base, 10 ... Management system, 11 ... Request amount detection part, 12 ... Processing rate judgment part, 13 ... Virtual server production | generation part, 101 ... CPU, 102 ... RAM, 103 ... ROM, 104 ... Communication module, 105 ... Auxiliary storage device, 20 ... Physical server, 21 ... Virtual server, 30 ... Open flow network, 31 ... Node.

Claims (4)

The together included in a mobile communication system including one or more physical server virtual server is created to perform any of the communication processing of the communication of a plurality of types including communications other than voice communication and voice communication A management system for managing virtual servers ,
Request amount detection means for detecting a request amount of communication processing for each type of communication in the virtual server;
For communication of a type set as a preferential type among the plurality of types, detected by the rated processing number indicating the processing capability of a virtual server that executes communication processing of the type stored in advance and the request amount detection unit The processing rate, which is the rate of requests processed among the communication processing requests input to the virtual server, is calculated from the requested amount, and the calculated processing rate is compared with a preset minimum processing rate and a processing rate determining means for determining whether or not the communication processing of the minimum processing rate possible for the demand,
If the determination by the processing rate determination unit is that the minimum processing rate communication processing is not possible for the request amount detected by the request amount detection unit, the minimum processing rate for the request amount A resource that is insufficient to enable the communication process is calculated, a communication process of the type set as the priority type is executed, and a virtual server corresponding to the calculated resource is placed on the physical server A virtual server generating means for generating;
A management system comprising:   The management system according to claim 1, wherein the type of communication set as the priority type is at least one of voice communication and mail.   The virtual server generation means assigns a virtual server that executes a communication process of a type not set as the priority type to a virtual server that executes a communication process of the type set as the priority type. The management system according to claim 1, wherein a virtual server is generated on the physical server. The together included in a mobile communication system including one or more physical server virtual server is created to perform any of the communication processing of the communication of a plurality of types including communications other than voice communication and voice communication A management method for managing a virtual server, which is an operation method of a management system for managing a virtual server ,
A request amount detection step of detecting a request amount of communication processing for each type of communication in the virtual server;
For the type of communication set as a preferential priority among the plurality of types, detected in the request amount detection step and the rated processing number indicating the processing capacity of the virtual server that executes the communication processing of the type stored in advance The processing rate, which is the rate of requests processed among the communication processing requests input to the virtual server, is calculated from the requested amount, and the calculated processing rate is compared with a preset minimum processing rate Then, a processing rate determination step for determining whether or not communication processing at the minimum processing rate is possible for the requested amount
If the determination in the processing rate determination step is such that communication processing at the minimum processing rate is not possible for the request amount detected in the request amount detection step, the minimum processing rate for the request amount A resource that is insufficient to enable the communication process is calculated, a communication process of the type set as the priority type is executed, and a virtual server corresponding to the calculated resource is placed on the physical server A virtual server generation step to generate;
Management method including.

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