JP6778146B2 - Service slice allocation device and service slice allocation method - Google Patents

Description

The present invention relates to a service slice allocation device and a service slice allocation method that cut out a service slice that is a virtual network from a network and assign it to a user.

Conventionally, communication services that meet various requests from users, such as the use of required bandwidths such as 10 Mbps and 100 Mbps, the use of high-speed lines, and the use of high-quality lines that do not interrupt data communication, are operated on networks (NW). ing. Therefore, there is a technique of having a plurality of service slices (also referred to as network slices) described later in the NW and selecting and operating the service slice for each service. As this technique, for example, there are those described in Non-Patent Documents 1 and 2.

A service slice (also referred to as a slice) is a plurality of virtual NWs set so as not to interfere with each other in a NW such as the Internet. This slice is selected according to the communication service from the user, assigned to the user, and operated.

Non-Patent Document 1 describes a technique for selecting slices according to the characteristics of a communication terminal such as a smartphone as a method for selecting slices. Non-Patent Document 2 describes a technique for reselecting slices in response to a service change, a subscriber information change, a network policy change, or the like.

Takuya Shimojo, 2 others, "Future Core NW for the 5G Era", NTT DOCOMO Technical Journal (Jan.2016) Vol. 23 No. 4 3GPP TR 23.799 V14.0.0 (2016-12), [online], the 3rd Generation Partnership Project, ([Search May 18, 2017], Internet <URL: http://www.3gpp. org / ftp // Specs / archive / 23_series / 23.799 / 23799-e00.zip>

However, in the technique of Non-Patent Document 1, when the number of service requests increases and there is no space for slices that provide services suitable for service requests, it becomes impossible to select slices suitable for services. In this case, you would either reject the service request or choose the next best slice. Even if the next best slice is selected, there may be a problem that the required quality of service is not completely satisfied.

By the way, if there is a vacancy in the slice suitable for the service, it is desirable to reselect the suitable slice. Non-Patent Document 2 describes a technique for reselecting slices. However, reselection is performed only when there is a vacancy in the slice suitable for the service, and if there is no vacancy, the suitable slice cannot be selected. Further, depending on the selected slice, the required communication quality cannot be satisfied, and there is a problem that the communication quality is deteriorated.

The present invention has been made in view of such circumstances, and a service capable of assigning a service slice suitable for a user's request for use of a communication service to a user so as not to deteriorate the quality of the requested communication service. An object of the present invention is to provide a slice allocation device and a service slice allocation method.

As a means for solving the above problems, the invention according to claim 1 is a service slice allocation device that allocates a service slice, which is a virtual network that provides a predetermined communication service, from the network to a terminal, and the communication service provides the service slice. A grouping unit that groups similar service slices and stores the plurality of grouped groups in the database, and a plurality of types of groups having different characteristics of the communication service provided by the grouped service slices are selected from the database. Then, the higher the ratio in which the service slice can realize the communication service under the conditions required by the terminal, the higher the priority is determined and the priority is given to the service slice of each selected group. , The service slice suitable for the request of the communication service of the terminal is searched in the order of the assigned priority, the searched service slice is assigned to the terminal from the network , and the searched service slice is obtained. The service slice allocating device is characterized by including a slice allocating unit for allocating service slices having the next priority when the service slice is exhausted .

The invention according to claim 4 is a service slice allocation method of a service slice allocation device that allocates a service slice, which is a virtual network that provides a predetermined communication service, from the network to a terminal, and the service slice allocation device communicates. From the database, a step of grouping service slices with similar services and storing the plurality of grouped groups in the database, and a plurality of types of groups having different characteristics of the communication service provided by the grouped service slices. A step of selecting and assigning a communication service under the conditions required by the terminal to the service slice of each selected group with a higher priority determined as the service slice is feasible, and the terminal. When the service slices suitable for the request of the communication service of the machine are searched in the order of the assigned priority, the searched service slices are assigned to the terminals from the network , and the searched service slices are exhausted. Is a service slice allocation method characterized by performing a step of assigning a service slice of the following priority .

According to the configuration of claim 1 and the method of claim 4, the following effects can be obtained. It is assumed that a service slice (slice) capable of providing a communication service (for example, a communication service related to a band) according to a request of a terminal is assigned to a user. At this time, for example, when there is only one group in which slices are grouped, if the slices that can provide the bandwidth are exhausted due to lack of space, it becomes impossible to support the communication service (service) of the bandwidth request. However, in the present invention, the higher the ratio of slicing the service of the band required by the terminal to the slices of a plurality of types of groups having different properties of services provided by the grouped slices, the higher the priority. It was judged and given. As a result, even if the slices related to the bands in one group are exhausted, the slices related to the bands in the other groups can be assigned to the users in order of priority. That is, slices suitable for the user's service usage request can be assigned to the user so as not to deteriorate the quality of the requested service.

In the invention according to claim 2, the grouping unit groups service slices similar to the communication service by using a set of service capacity values which are performance indexes of the communication service provided by the service slice, and this grouping is performed. The service slice allocation device according to claim 1, wherein a plurality of types of groups having different properties of the service capacity value are created by the method of the above.

According to this configuration, it is possible to create a plurality of types of groups having different properties of the service capacity value, which is a performance index of the service provided by the slice. That is, multiple types of groups with different slice service properties are created. This includes multiple groups of the same type that contain slices with similar services. Therefore, even if the slices that can provide the bandwidth as the communication service in one group are exhausted, the slices related to the bandwidth in the other group can be allocated to the terminal.

In the invention according to claim 3, the priority determination granting unit scores the service slices included in the group stored in the database according to the ratio of realizing the communication service under the conditions required by the terminal. The first or second claim, wherein an average score is calculated for each group, and service slices included in a predetermined number of groups from the top of the average score are given higher priority in descending order of score. It is a service slice allocation device.

According to this configuration, the slice of each group related to the band of the communication service is scored higher as the ratio of realizing the service required by the terminal, for example, is higher. After that, the average score is calculated for each group. Therefore, when a predetermined number of groups are selected from the top of the average score, each selected group contains slices that provide bandwidth. Since these slices are given higher priority in descending order of score, even if there is no space in the slices related to the bands in one group, the users can use the slices related to the bands in other groups in order of priority. Can be assigned to.

According to the present invention, it is possible to provide a service slice allocating device and a service slice allocating method for allocating a service slice suitable for a user's communication service usage request to the user so as not to deteriorate the quality of the requested communication service. ..

It is a block diagram which shows the structure of the network system which includes the service slice allocation apparatus which concerns on embodiment of this invention. It is a block diagram which shows the structure of the service slice allocation apparatus of this embodiment. It is a figure which shows the structure example of the priority list. It is a flowchart for demonstrating the slice allocation operation to the user terminal by the service slice allocation apparatus of this embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<Structure of Embodiment>
FIG. 1 is a block diagram showing a configuration of a network system including a service slice allocation device according to an embodiment of the present invention.
The network system 10 shown in FIG. 1 includes an access NW (network) 35, a core NW36, an orchestrator unit 1 and an infrastructure manager unit 2 that manage the NWs 35 and 36. The infrastructure manager unit 2 manages devices such as an IA server, a core router, SDN-L2SW, PON, L2SW, and L3SW, which are configured by a computer and constitute a core NW36 and an access NW35, which will be described later. The orchestrator unit 1 is composed of a computer, and deploys, sets, and manages hardware, middleware, applications, and services for the core NW36 and the access NW35 via the infrastructure manager unit 2.

A service slice allocation device (also referred to as an allocation device) 40, which is a feature element of the present embodiment, is connected to the orchestrator unit 1 and the infrastructure manager unit 2. The allocation device 40 allocates a slice (service slice), which is a virtual NW that provides a predetermined communication service, from the network to the user terminal 3.

First, the basic configuration of the network system 10 will be described.
As shown in FIG. 1, the devices arranged in the core NW36 include a core router (core NW36 side device), SDN-L2SW (Software Defined Networking Layer2 Switch) (core NW36 side device), and an IA server {IA (Intel (Intel (Intel (Intel (Intel (Intel (Intel (Intel))). There is also a registered trademark) Architecture) server, or H / W (Hardware)}, but it is not limited to these.

The core router is a packet transfer device that passes through the core NW36. The SDN-L2SW is an SDN-compatible transfer device that transfers a packet via the core NW36, and serves as an EP (End Point) of a path to which the packet is transferred by the core NW36.

The IA server can generate one or more VMs (Virtual Machine: virtual machine, sometimes referred to as a virtual server) by a well-known virtualization technique. An APL (Application) can be placed in the VM, and a predetermined network service is provided to the user by operating the APL on the VM.

The IA server is installed in one or more DCs (Data Centers). Each of the DCs has one or more IA servers. One DC can be regarded as a group of IA servers. The DC includes a GWSW (Gateway Switch) (not shown) for connecting to another DC.

One VM includes one or more DC connection points {vCP (VNF Connection Point)}. The vCP connects with the vCPs of other VMs generated on the same IA server in the same DC. The vCP can also be connected to one or more DC connection points {gCP (GW Connection Point)} of the GWSW in the same DC. The gCP is in charge of communication between DCs and connects to a connection point {aCP (Access Connection Point)} for connecting to the access NW35. The aCP is provided for a device on the access NW35 or a device on the core NW36 (eg, SDN-L2SW) connected to the device.

The devices arranged in the access NW35 include, but are not limited to, PON (Passive Optical Network), L2SW (Layer2 Switch), and L3SW (Layer3 Switch). PON means a device that introduces communication infrastructure such as optical fiber to a plurality of user's homes. An example of PON is OLT (Optical Line Terminal). The L2SW is a transfer device that controls packets passing through the access NW35 on the second layer of OSI (Open Systems Interconnection). The L3SW is a transfer device that controls packets passing through the access NW35 on the third layer of OSI.

The orchestrator unit 1 acquires a request such as a network service generation request (details will be described later) from the host device U operated by the operator. The orchestrator unit 1 includes an E2EO (End to End Orchestrator) 11, an SVRO (Server Resource Orchestrator) 12, and a NWRO (Network Resource Orchestrator). ) 13.

The E2EO 11 manages the network service provided to the user. The SVRO12 manages the resources of the general-purpose server arranged in the core NW36 and the resources of the virtual server generated on the general-purpose server. The NWRO13 manages the resources of the core NW36 and the resources of the access NW35.

The infrastructure manager unit 2 includes VNFM (Virtual Network Function Manager) 21, VIM (Virtual Infrastructure Manager) 22, and H / W EMS (Element Management System) 23. , EMS24 for APL, OSS (Open Source Software) 25, NMS (Network Management System) 31, PON-EMS32a, L2-EMS32b, L3-EMS32c, WIM (WAN) (WideArea Network) Infrastructure Manager) 33.

The VNFM 21 controls and manages the APL mounted on the VM generated in the IA server. The VIM 22 controls and manages the VM generated in the IA server. The H / W EMS23 controls and manages the IA server, core router, and SDN-L2SW. The APL EMS 24 controls and manages the APL in response to the request information from the host device U via the OSS 25. The OSS25 is middleware that operates the infrastructure manager unit 2 in response to a request from the host device U.

The NMS 31 controls and manages the access NW35. The PON-EMS32a controls the PON and manages the PON. L2-EMS32b controls L2SW and manages it. L3-EMS32c controls L3SW and manages it. WIM33 controls and manages the core NW36.

Next, the allocation device 40, which is a feature element of the present embodiment, is configured by being connected to the orchestrator unit 1, the infrastructure manager unit 2, and the access NW35, and is configured by the slice control unit 41 and the SDN (Software Defined Networking) management unit 42. And an inventory DB (database) 43. The slice control unit 41 is connected to the infrastructure manager unit 2 and the access NW35, and the SDN management unit 42 and the inventory DB 43 are connected to the orchestrator unit 1 and the infrastructure manager unit 2.

As shown in FIG. 2, the slice control unit 41 includes a connection request transfer unit 41a and a slice allocation unit 41b. A user terminal 3 (see FIG. 1) is connected to the connection request transfer unit 41a and the slice allocation unit 41b. The user terminal 3 is also referred to as a terminal 3. The access NW35 connected to the slice allocation unit 41b is referred to as a first service slice SL1 to an nth service slice SLn (also referred to as a first slice SL1 to an nth slice SLn) as a plurality of virtual NWs so as not to interfere with each other. ) Is set.

The SDN management unit 42 includes a slice allocation setting unit 45. The slice allocation setting unit 45 includes a data reception unit 45a, a priority determination giving unit 45b, a data transmission unit 45c, and a slice grouping unit 45d.

The inventory DB (also referred to as DB) 43 stores information related to slices, and includes slice group / belonging slice information D1 (also referred to as information D1) and performance index information D2 (also referred to as information D2) of each slice. , Service requirement information D3 (also referred to as information D3) for each user's terminal (or for each APL of the terminal) is stored.

The SDN of the SDN management unit 42 is a process in which the communication devices constituting the NW are centrally controlled by a single software, and the configuration and settings of the NW can be flexibly and dynamically changed (described later). Is. Dynamic means having the flexibility that the state and configuration of the processing function can be changed according to the situation and can be selected according to the situation.

SDN will be further described. Generally, in NW (for example, access NW35 in FIG. 1), each communication device (corresponding to PON, L2SW, L3SW of access NW35) has an independent OS (Operating System), control software, route selection function, and data transfer function. It is necessary to perform work such as setting and configuration one by one or for each type of communication device, and the configuration of NW is fixed. In SDN, the control function and data transfer function of communication equipment are separated, and the control function is centrally managed in one place by software, so it is possible to flexibly set which communication equipment to operate and what kind of operation. It has become.

The SDN management unit 42 centrally manages the control functions of PON, L2SW, and L3SW as communication devices in the access NW35 (FIG. 1), and manages to flexibly set what kind of operation is to be performed.

The slice allocation setting unit 45 of the SDN management unit 42 makes the settings necessary for allocating the slice (service slice) of the access NW35 to the user terminal 3.

The slice grouping unit (also referred to as a grouping unit) 45d groups slices that provide communication services such as bandwidth and delay to the user. When grouping the slices, the grouping unit 45d acquires the performance index information D2 of each slice and the service requirement information D3 for each terminal from the DB 43, and the service performance index of the slice according to the service requirement. Group each slice using.

This grouping will be further described. User service requirements include the use of required bandwidths such as 10 Mbps and 100 Mbps, the use of high-speed lines (allowable delay), the use of high-quality lines that do not interrupt data communication, etc., from a single type to multiple types of communication services. There are requirements.

Therefore, the grouping unit 45d uses a slice performance index suitable for service requirements such as a required bandwidth and an allowable delay as a service capacity value. Further, the grouping unit 45d is grouped to a set S _i for that service capability value, similar and the individual or variable by applying the well-known clustering methods for grouping, the slices services provided to the user is similar To do. Further, the grouping unit 45d creates a plurality of types of group Gk having different properties of the service capacity value of the slice by the grouping method.

The reason for creating a plurality of types of group Gk having different properties of the service capacity value of the slice in this way is, for example, as follows. In the case of only one group G1, when allocating a slice related to a band in this group G1 to a user, if the slice (specific resource) related to that band becomes full and exhausted, the service of the user's bandwidth request can be supported. It disappears. However, in the present embodiment, k groups Gk having different properties of service capacity values are created. This includes multiple groups of the same type that contain slices with similar services. Therefore, even if the slices related to the band in one group G1 are exhausted, the slices related to the band in the other group G2 can be assigned to the user.

That is, the grouping unit 45d creates k group Gk having different properties of the service capacity value, and shows the information of these group Gk and the service information of each slice belonging to each group Gk. The affiliation slice information D1 is stored in the DB 43.

Here, the first slice SL1 of the access NW35 shown in FIG. 2 has a set of service capacity values S _i {S ₁ = (S _j | j = 1 ... m ₁ )}, and the nth slice SLn has a service capacity. It has a set of values S _n {S _n = (S _j | j = 1 ... _mn )}.

Next, the connection request transfer unit 41a shown in FIG. 2 outputs a connection request including a communication service request from the user terminal 3 to the data receiving unit 45a as connection requirement information. The data receiving unit 45a receives the connection requirement information and outputs it to the priority determination assigning unit 45b.

When the connection requirement information is input, the priority determination assigning unit 45b refers to the information D1 to D3 of the DB 43, and sets the priority for each slice in each group including the slice related to the connection requirement information as follows. Give to. First, assuming that the connection requirement, which is a service request, is sent as a condition of a request band of 100 Mbps, the priority determination granting unit 45b uses the connection requirement of this condition as an index. For example, a band of 100 Mbps that completely satisfies the conditions is used as an index with a maximum of 100 points.

Next, the priority determination granting unit 45b scores each slice belonging to the group individually. This scoring is to derive how many points out of 100 points. For example, a slice that realizes a band of 100 Mbps has a score of 100 points, and a slice that realizes a band of 90 Mbps has a score of 90 points. After that, slices are scored in the same way. After that, the priority determination giving unit 45b calculates the average score of the scored slices in one group. In this way, the priority determination giving unit 45b scores each slice in all the groups related to the information D1 in the DB 43, and calculates the average score.

Next, the priority determination granting unit 45b selects the top N groups having a high average score (in other words, suitable for the connection requirement), and has a high score for all slices belonging to the selected N groups. Give higher priority in order.

For example, as shown in FIG. 3, the top three groups G1, G2, G3 are selected, the selected group G1 has three slices SL1, SL2, SL3, and the group G2 has three slices SL4, SL5, SL6. , Suppose there are three slices SL7, SL8, SL9 in group G3. In addition, a score of 90 points is given to slice SL1, 70 points for SL2, 40 points for SL3, 80 points for SL4, 100 points for SL5, 50 points for SL6, 60 points for SL7, 80 points for SL8, and SL9. It is assumed that a score of 70 points is given.

In all slices SL1 to SL9, the priority determination giving unit 45b assigns priority 1 to the slice with the highest score of 100 points, and gives priority 1 to the slice with the second highest score of 90 points, and gives priority 80 points to the slice with the second highest score. Priority 3 and 4 for slices with 70 points, priority 4 and 5 for slices with 60 points, priority 5 for slices, and 50 points for slices with high priority for 6 and 7 Give priority to 7 slices of 40 points.

In other words, the 100 Mbps bandwidth of the connection requirement is given priority 1 to slices that are 100% feasible, priority 2 to slices that are 90% feasible, and priority 3 to slices that are 80% feasible. Prioritize other slices as well.

In this way, the priority determination giving unit 45b creates a priority list 50 by determining and assigning the priorities 1 to 7 of all slices SL1 to SL9, and outputs the priority list 50 to the data transmission unit 45c. To do. The data transmission unit 45c transmits the priority list 50 to the slice allocation unit 41b.

In addition to the above, when the priority determination assigning unit 45b gives priority to each slice, it is assumed that there are a plurality of connection requirements corresponding to the service requirements of the user. For example, when there are three connection requirements, required bandwidth, allowable delay, and predetermined quality line, priority 1 is given to the slice that can realize all three connection requirements, and the slice that can realize only two connection requirements. It is also conceivable to give priority 2 to and give priority 3 to slices that can realize only one connection requirement.

In addition, each slice determines what percentage of the three connection requirements can be achieved. For example, assuming that one slice can achieve the required bandwidth of 80%, the allowable delay of 70%, and the predetermined line quality of 60%, the average value of 70% is obtained. The average value is calculated in the same way for other slices. It is also conceivable to set this average value as a feasible ratio of the three connection requirements, and give higher priority to each slice in descending order of the ratio.

The slice allocation unit 41b shown in FIG. 2 searches the slices suitable for the service request in the connection requirement information supplied from the connection request transfer unit 41a from the priority list 50 created based on the same connection requirement information in order of priority. Then, the slices SL1 to SLn in the access NW35 that match the searched slices are assigned to the user terminal 3. At this time, the slice allocation unit 41b allocates the slice SL1 having the priority 2 if the slice SL5 having the priority 1 (see FIG. 3) in the access NW35 is in use.

<Operation of the embodiment>
The operation of allocating slices to the user terminal 3 by the allocating device 40 will be described with reference to the flowchart shown in FIG. At this time, reference is made to FIGS. 1 to 3.

In step S1, the grouping unit 45d acquires the performance index information D2 of each slice and the service requirement information D3 for each user terminal from the DB 43, and based on these information D2 and D3, the performance index suitable for the service requirement. Collect a predetermined number of slices and group them. At this time, the grouping unit 45d creates a group G of slices having similar services provided to the user, and creates a plurality of types of group Gk having different properties of the service capacity value of the slices by this creation method. The grouping unit 45d stores in the DB 43 the slice group / belonging slice information D1 indicating the group information and the service information for each slice belonging to each group Gk for each group Gk created.

In step S2, it is assumed that the connection request transfer unit 41a receives a connection request including a communication service request (for example, a usage request of a bandwidth of 100 Mbps) from the user terminal 3. In step S3, the connection request transfer unit 41a outputs the connection request information as connection requirement information to the priority determination assigning unit 45b via the data receiving unit 45a.

In step S4, when the connection requirement information is input, the priority determination assigning unit 45b refers to the information D1 to D3 of the DB 43, and prioritizes all the slices in the group including the slice related to the connection requirement information. Is granted.

First, in step S5, the priority determination granting unit 45b sets the connection requirement of the band 100 Mbps, which is a service request, as an index of 100 points, for example.

Next, in step S6, the priority determination granting unit 45b scores each slice individually based on the above index. For example, as shown in FIG. 3, a slice that realizes a band of 100 Mbps has a score of 100 points, and a slice that realizes a band of 90 Mbps has a score of 90 points. Similarly, other slices are scored thereafter.

After that, in step S7, the priority determination granting unit 45b calculates the average score of the slices scored for each group in all the scored groups.

Next, in step S8, the priority determination assigning unit 45b selects the top N groups having the highest average scores, and assigns the highest priority to all slices belonging to the selected N groups in descending order of score. Then, the priority list 50 is created. For example, the priority determination assigning unit 45b assigns priorities 1 to 7 as shown in FIG. 3 to create a priority list 50.

In step S9, the priority determination granting unit 45b transmits the priority list 50 to the slice allocation unit 41b via the data transmission unit 45c.

In step S10, the slice allocation unit 41b searches the priority list 50 created based on the same connection requirement information for slices suitable for the service requirement in the connection requirement information from the connection request transfer unit 41a in order of priority. For example, assume that slice SL1 having priority 2 (FIG. 3) is searched.

In step S11, the slice allocation unit 41b determines whether or not the searched slice SL1 of priority 2 is free in the access NW35. If it is not empty (No), the process returns to step S10 and searches for the next slices SL4 and SL8 having priority 3.

After that, in step S11, when only the searched slice SL8 of priority 3 is empty in the access NW35 (Yes), in step S12, the slice allocation unit 41b uses the slice SL8 in the access NW35 as a user terminal. Assign to 3.

<Effect of embodiment>
As described above, the allocation device 40 of the present embodiment allocates a slice (service slice), which is a virtual network that provides a predetermined service (communication service), from the access NW35 (network) to the user terminal 3. Yes, it has the following feature structure.

(1) The service includes a grouping unit 45d that groups similar slices and stores the grouped plurality of groups in the DB (database) 43. In addition, a plurality of types of groups having different service characteristics provided by the grouped slices are selected from the DB 43, and the ratio at which the service requested by the user terminal 3 can be sliced into the slices of each selected group. The larger the value is, the higher the priority is determined and the priority determination giving unit 45b is provided. Further, the slices suitable for the service request of the user terminal 3 are searched in the order of priority, and the slice allocation unit 41b is provided to allocate the searched slices to the user terminal 3 from the network.

According to this configuration, the following effects can be obtained. When allocating a slice that can provide a service (for example, bandwidth) according to the request of the user terminal 3 to a user, for example, if there is only one group in which the slices are grouped, there is space in the slice that can provide that bandwidth. When it is exhausted and exhausted, it becomes impossible to support bandwidth request services. However, in the present embodiment, the larger the ratio of slicing the service of the band required by the user terminal 3 to the slices of a plurality of types of groups having different service characteristics provided by the grouped slices, the higher the priority. The degree was judged to be high and given. As a result, even if the slices related to the bands in one group are exhausted, the slices related to the bands in the other groups can be assigned to the user terminal 3 in the order of priority. That is, slices suitable for the user's service usage request can be assigned to the user terminal 3 so as not to deteriorate the quality of the requested service.

Further, even when the optimum slice cannot be assigned, similar slices can be assigned, so that it is possible to avoid allocating slices of completely different services.

(2) The grouping unit 45d groups slices having similar services by using a set of service capacity values which are performance indexes of services provided by the slices, and the nature of the service capacity values is determined by this grouping method. Changed to create different types of groups.

As a result, it is possible to create a plurality of types of groups having different properties of the service capacity value, which is a performance index of the service provided by the slice. That is, multiple types of groups with different slice service properties are created. This includes multiple groups of the same type that contain slices with similar services. Therefore, even if the slices that can provide the bandwidth as a service in one group are exhausted, the slices related to the bandwidth in the other group can be allocated to the user terminal 3.

(3) The priority determination assigning unit 45b scores the slices included in the group stored in the DB 43 according to the ratio of realizing the service requested by the user terminal 3, calculates the average score for each group, and calculates the average score. Slices included in a predetermined number of groups from the top of the average score are given higher priority in descending order of score.

As a result, the slices of each group related to the service bandwidth are scored to a higher value as the ratio of realizing the service requested by the user terminal 3, for example, is higher. After that, the average score is calculated for each group. Therefore, when a predetermined number of groups are selected from the top of the average score, each selected group contains slices that provide bandwidth. Since these slices are given higher priority in descending order of score, even if there is no space in the slices related to the bands in one group, the users can use the slices related to the bands in other groups in order of priority. Can be assigned to.

In addition, the specific configuration can be appropriately changed without departing from the gist of the present invention.

3 User terminal 10 Network system 35 Access NW (network)
40 Service slice allocation device 41 Slice control unit 41a Connection request transfer unit 41b Slice allocation unit SL1 to SLn Service slice 42 SDN management unit 43 Inventory DB (database)
45 Slice allocation setting unit 45a Data reception unit 45b Priority judgment granting unit 45c Data transmission unit 45d Slice grouping unit

Claims (4)

A service slice allocation device that allocates a service slice, which is a virtual network that provides a predetermined communication service, from the network to a terminal.
A grouping unit that groups service slices with similar communication services and stores multiple grouped groups in the database.
A plurality of types of groups having different properties of communication services provided by the grouped service slices are selected from the database, and the service slices of the selected groups are provided with the communication services under the conditions required by the terminal. The higher the ratio of slices that can be realized, the higher the priority is determined and the priority is assigned.
The service slices suitable for the request of the communication service of the terminal are searched in the order of the assigned priority, the searched service slices are assigned to the terminals from the network , and the searched service slices are exhausted. If this is the case, a service slice allocation device that includes a slice allocation unit that allocates service slices of the following priority . The grouping section
A set of service capacity values, which is a performance index of a communication service provided by the service slice, is used to group service slices having similar communication services, and a plurality of service capacity values having different properties are used by this grouping method. The service slice allocation device according to claim 1, wherein a group of types is created. The priority determination assigning unit
The service slices included in the group stored in the database are scored according to the ratio of realizing the communication service under the conditions required by the terminal, the average score is calculated for each group, and the average score is calculated from the top of the average score. The service slice allocation device according to claim 1 or 2, wherein the service slices included in a predetermined number of groups are given higher priority in descending order of score. A service slice allocation method of a service slice allocation device that allocates a service slice, which is a virtual network that provides a predetermined communication service, from the network to a terminal.
The service slice allocation device is
The step of grouping service slices with similar communication services and storing multiple grouped groups in the database,
A plurality of types of groups having different characteristics of communication services provided by the grouped service slices are selected from the database, and the service slices of the selected groups are provided with the communication services under the conditions required by the terminal. The larger the ratio of slices that can be realized, the higher the priority is determined and the step is given.
The service slices suitable for the request of the communication service of the terminal are searched in the order of the assigned priority, the searched service slices are assigned to the terminals from the network , and the searched service slices are exhausted. If so, a service slice allocation method characterized by performing the steps to assign the service slices of the following priority:

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