JP6451863B2 - COMMUNICATION SYSTEM, BASE STATION DEVICE, CONTROL DEVICE, AND COMMUNICATION METHOD - Google Patents

Description

  The present invention relates to a communication system, a base station apparatus, a control apparatus, and a communication method in a wireless communication network.

  In recent years, network function virtualization has been studied for the purpose of reducing CAPEX (Capital Expenditure) and OPEX (Operating Expense), and reducing the installation space and power consumption of facilities. Specifically, as a technology for virtualizing server computing, storage, network functions, etc., software by a virtual machine (VM) installed on a virtualization layer such as a hypervisor on the server. NFV (Network Functions Virtualization) etc. which are realized in an actual manner are known.

  As an example of NFV, there is a technology that aggregates and virtualizes various network functions such as NAT (Network Address Translation) and DHCP (Differentiated Services Code Point) provided by the Broadband Router in the user's home on the network side of the carrier. .

  For example, Patent Document 1 describes a system that virtually constructs a network function provided by BRAS (Broadband Remote Access Server).

International Publication No. 2014/192259

  A general Broadband Router arranged in a user's home is equipped with a function (Web Portal) for performing maintenance processing of various network functions. However, when the web portal functions installed in a general home gateway are concentrated on the network side of a communication company, the following problems arise.

  That is, compared with the case where the web portal function is installed in the Broadband Router in each user's home, there is a possibility that the network performance and the congestion of the maintenance process occur, and the processing performance deteriorates. Then, the influence of the deterioration of the performance of the maintenance process uniformly affects a plurality of aggregated users. That is, the performance of the maintenance processing of the network device cannot be differentiated according to the user terminal.

  Here, in the system described in Patent Document 1, although there is a description that BRAS is selected according to the contents of a contract of a user, no measures are taken for maintenance processing of various network functions. Therefore, in patent document 1, the subject mentioned above cannot be solved.

  Accordingly, one of the objects to be achieved by the present invention is to provide a communication system capable of differentiating the performance of maintenance processing of network devices according to user terminals.

  The communication system of the present invention is a communication system that provides communication services to a plurality of aggregated terminals, and includes a first network device and a maintenance device that executes maintenance processing of the first network device. And when the first network device receives the first message related to the maintenance processing request from the first terminal included in the plurality of terminals, the first priority information corresponding to the first terminal is The assigned second message is generated, and the second message is transmitted to the maintenance device.

  The network device of the present invention is a network device in a communication system that provides communication services to a plurality of aggregated terminals, and relates to a request for maintenance processing of the network device from a first terminal included in the plurality of terminals. A receiving unit that receives the first message, and a message generating unit that generates a second message to which the first priority information corresponding to the first terminal is assigned when the receiving unit receives the first message. And a transmission unit that transmits the second message to the maintenance device that executes the maintenance process.

  The maintenance device of the present invention is a maintenance device that performs maintenance processing of a network device in a communication system that provides communication services to a plurality of aggregated terminals, and includes a selection unit and a plurality of processing execution units. Then, when the selection unit receives a message related to the maintenance process requested by the first terminal included in the plurality of terminals, the selection unit is based on the first priority information corresponding to the first terminal given to the message. Then, the process execution unit that performs the maintenance process is selected from the plurality of process execution units.

  The method of the present invention is a method in a communication system for providing a communication service to a plurality of aggregated terminals, and is a first related to a request for maintenance processing of a network device from a first terminal included in the plurality of terminals. Receiving the first message, generating the second message with the first priority information corresponding to the first terminal when the first message is received, and transmitting the second message And a step of performing.

  According to the above-described present invention, the performance of the maintenance processing of the network device can be differentiated according to the user terminal.

1 is a block diagram showing a configuration of a communication system according to a first embodiment. It is a flowchart for demonstrating operation | movement of the communication system which concerns on 1st Embodiment. 1 is a block diagram showing a configuration of a communication system according to a first embodiment. It is a block diagram which shows the structure of the web portal which concerns on 2nd Embodiment. It is a flowchart for demonstrating operation | movement of the communication system which concerns on 2nd Embodiment. It is a block diagram which shows the structure of the communication system which concerns on 3rd Embodiment. It is a block diagram which shows the structure of the web portal which concerns on 3rd Embodiment. It is a block diagram which shows the structure of the load distribution server which concerns on 3rd Embodiment. It is a flowchart for demonstrating operation | movement of the communication system which concerns on 3rd Embodiment. It is a flowchart for demonstrating operation | movement of the communication system which concerns on 3rd Embodiment.

  Hereinafter, specific embodiments will be described in detail with reference to the drawings. In each drawing, the same or corresponding elements are denoted by the same reference numerals, and redundant description is omitted as necessary for clarification of the description.

  A plurality of embodiments described below can be implemented independently or in combination as appropriate. The plurality of embodiments have different novel features. Therefore, these multiple embodiments contribute to solving different purposes or problems and contribute to producing different effects.

[First embodiment]
The configuration of the communication system in the first embodiment of the present invention will be described with reference to FIG.

The communication system 10 according to the present embodiment is a communication system that provides a communication service to a plurality of aggregated user terminals 100 _{1 to} 100 _M. The communication system 10 includes a network device 101 and a maintenance device 102 that executes maintenance processing for the network device 101.

Next, operation | movement of the communication system 10 in this embodiment is demonstrated using FIG.
Network device 101 from the user terminals included in the plurality of user terminals ₁₀₀ 1 to 100 _M (a user terminal 100 ₁ in this case), it receives the first message relating to the request for the maintenance process of the network device 101 (step S1 ). Network device 101, when receiving the first message, generating a second message priority information corresponding to the user terminal 100 ₁ is attached (step S2). Then, the network device 101 transmits a second message to the maintenance device 102 (step S3).

Thus, the maintenance apparatus on the basis of the second message priority information is given corresponding to the user terminal 100 _1, it becomes possible to perform maintenance treatment of the network device 101.

  Therefore, the performance of the maintenance process of the network device can be differentiated according to the user terminal.

  The priority information in the present embodiment is, for example, information indicating a DSCP (Dynamic Host Configuration Protocol) value or a subscription service class of a terminal user. The network device 101 is, for example, a virtualized IPFE (Internet Protocol Front End) device. The IPFE device constitutes a BRAS server. Furthermore, the maintenance device 102 is, for example, a web portal device.

  The communication system 10 can be applied to a virtual system called a virtual BRAS system (vBRAS system) or a virtual CPE (Customer Premises Equipment) system (vCPE system).

[Second Embodiment]
A communication system according to the second embodiment of the present invention will be described. The configuration of the communication system 20 in the present embodiment is shown in FIG. The communication system 20 has a configuration in which the maintenance device 102 of the communication system 10 of the first embodiment is a web portal device 200. The web portal device 200 is a modification of the maintenance device 102 and executes maintenance processing of the network device 101 in the same manner as the maintenance device 102.

The configuration of the web portal apparatus 200 will be described with reference to FIG. The web portal device 200 includes a selection unit 201 and a plurality of processing execution units 202 _{1 to} 202 _N. The selection unit 201 receives a message related to maintenance processing requested by user terminals included in the user terminals 100 _{1 to} 100 _M (referred to as user terminal 100 ₁ in the present embodiment). Then, the selection unit 201 requests the user terminal 100 ₁ from among the plurality of processing execution units 202 _{1 to} 202 _N based on the priority information corresponding to the user terminal 100 ₁ given to the received message. A process execution unit that performs maintenance processing is selected.

  Next, operation | movement of the communication system 20 in this embodiment is demonstrated using FIG. Steps S1 and S2 are the same as those in the first embodiment, and a description thereof will be omitted.

Network device 101 transmits a second message priority information corresponding to the user terminal 100 ₁ is applied to the web portal device 200 (step S4). When the selection unit 201 of the web portal apparatus 200 receives the second message, the selection unit 201 of the plurality of processing execution units 202 _{1 to} 202 _N is based on the priority information of the user terminal 100 ₁ given to the second message. from within, to select a processing execution unit for executing a maintenance processing of the user terminal 100 ₁ requests (step S5).

For example, the priority information given to the second message, when the user terminal 100 ₁ indicates that it is a high priority user terminal, selecting unit 201, a plurality of processing execution unit 202 ₁ to 202 _N Among them, a processing execution unit with a low load is selected. In addition, when there is a maintenance process request from each of a plurality of user terminals having different priorities, the maintenance process requested by the user terminal with a higher priority may be assigned to a process execution unit with a lower load in order. .

  Thereby, in this embodiment, it becomes possible to differentiate the performance of the maintenance process of a network apparatus according to a user.

  In addition, the process execution part in this embodiment can be comprised by a business logic server or an application server, for example.

[Third embodiment]
Next, a communication system according to the third embodiment of the present invention will be described.

The configuration of the communication system 30 in the present embodiment will be described with reference to FIG. The communication system 30 in this embodiment includes a plurality of user terminals 300 _{1 to} 300 _L , a plurality of CPEs 301 _{1 to} 301 _m , an IPFE device 302, a NAT device 303, a DHCP device 304, a web portal device 305, A management server 306. Note that the CPEs 301 _{1 to} 301 _m , the IPFE device 302, the NAT device 303, the DHCP device 304, and the web portal device 305 each provide network functions necessary for providing a communication service to the plurality of user terminals 300 _{1 to} 300 _L. It is a device that has become. The communication system 30 can be applied to a virtual system called virtual CPE, vCPE, virtual BRAS system, or vBRAS.

Each of the CPEs 301 _{1 to} 301 _m aggregates a plurality of user terminals and connects to the IPFE device 302. The IPFE device 302 is a device that aggregates the CPEs 301 _{1 to} 301 _m and constitutes a BRAS server. The NAT device 303 performs NAT conversion when the user terminals 300 _{1 to} 300 _L communicate with the Internet network. The DHCP device 304 manages the DHCP information of the user terminals 300 _{1 to} 300 _L. Web portal device 305, based on a request from the user terminal ₃₀₀ 1 to 300 _L, performs maintenance processing IPFE apparatus 302, NAT device 303 and DHCP 304. The maintenance process performed on the NAT device 303 is, for example, settings related to an IPv4 (Internet Protocol version 4) -based firewall that is necessary for the user terminal to communicate with a specific counter terminal. The maintenance process performed on the IPFE device 302 is, for example, a setting related to an IPv6 (Internet Protocol version 6) -based firewall. The maintenance process performed on the DHCP device 304 is, for example, setting of an IP (Internet Protocol) address range that is issued to the subscriber terminal. The management server 306 manages information necessary for the CPEs 301 _{1 to} 301 _m to perform connection authentication with the IPFE device 302 and the user terminals 300 _{1 to} 300 _L to receive a communication service. Further, the NAT device 303 and the web portal device 305 are each connected to the Internet network.

Next, the configuration of the web portal apparatus 305 will be described with reference to FIG. The web portal apparatus 305 includes a load distribution server 307, a plurality of front-end servers 308 _{1 to} 308 _n , a plurality of business logic servers 309 _{1 to} 309 _n, and a database server 310. The load distribution server 307 serves as a receiving port for HTTP (Hypertext Transfer Protocol) packets. Also, the load distribution server 307 selects a business logic server that executes maintenance processing requested by the user terminal. Front-end server ₃₀₈ 1 _{~308 n} transfers the HTTP packet received to the business logic server ₃₀₉ 1 _{~309 n,} controls the screen generation and transition. The business logic servers 309 _{1 to} 309 _n execute processing based on the messages transferred from the front end servers 308 _{1 to} 308 _n . The database server 310 stores information executed and updated by the business logic servers 309 _{1 to} 309 _n . Front-end server ₃₀₈ 1 _{~308 n} each is configured so the business logic server ₃₀₉ 1 _{~309 n} pair. Note that the processing load of the business logic servers 309 _{1 to} 309 _n that actually execute the maintenance process in the web portal apparatus 305 is very large. Therefore, in a communication system that aggregates a plurality of user terminals as in the present embodiment, a plurality of business logic servers in the web portal are required. On the other hand, the processing load of the front-end servers 308 _{1 to} 308 _n that performs packet transfer processing between the load distribution servers 307 and screen generation of processing results is small compared to the processing load of the business logic servers 309 _{1 to} 309 _n .

Next, the configuration of the load distribution server 307 will be described with reference to FIG. The load distribution server 307 includes an HTTP transmission / reception unit 311, a determination unit 312, a selection unit 313, and a communication unit 314. The HTTP transmission / reception unit 311 transmits / receives an HTTP request and a response. Specifically, the HTTP transmission / reception unit 311 receives a maintenance processing request message from the user terminal via the IPFE device 302. Also, HTTP transceiver unit 311, a response message regarding the result of the maintenance process, and transmits to the user terminal 300 ₁ via a IPFE device 302. The determination unit 312 holds correspondence information between the user service class and the DSCP value, and determines the user service class from the DSCP value added to the IP header of the received packet. Then, the determination unit 312 notifies the selection unit 313 of the determination result of the service class of the user. The selection unit 313 periodically collects the load status of each of the business logic servers 309 _{1 to} 309 _n , and executes the maintenance process requested by the user based on the service class notified from the determination unit 312 Select. The communication unit 314 transmits the received processing content to the front-end server corresponding to the business logic server selected by the selection unit 313.

Next, the operation of the communication system 30 in the present embodiment will be described. _First , an operation flow from when the user terminal 3001 joins the network to make a login request to the web portal apparatus 305 and acquire a user service class will be described with reference to FIG.

First, in order for the user terminal 300 ₁ is subscribed to a network, it puts CPE301 ₁ power aggregating user terminal 300 ₁ (step S10). CPE301 ₁ performs a connection request to the IPFE device 302 (step S11). The IPFE device 302 executes an authentication process for the management server 306 (step S12). At this time, the IPFE device 302 acquires from the management server 306 a correspondence table between the service class of the user and the DSCP value assigned to the IP packet. The IPFE device 302 establishes a communication path with the NAT device 303 (step S13). IPFE device 302 notifies the connection completion to CPE301 ₁ (step S14). User terminal 300 ₁ via the IPFE device 302 performs a login request to the web portal apparatus 305 (step S15). At this time, IPFE device 302, the IP packet of the login request, by applying a DSCP value corresponding to the service class of the user terminal 300 ₁ transmits the NAT device 303 (step S16). The NAT device 303 rewrites the transmission source IP packet in the received IP packet with a packet indicating the device itself, and transmits a login request to the web portal device 305 (step S17). Web portal apparatus 305, the DSCP value IPFE device 302 has acquired granted to the login response in step S12, via the IPFE device 302, transmits the login response to the user terminal 300 ₁ (step S18). User terminal 300 _1, open the setting screen.

Then, the user terminal 300 _1, the operation flow in the case that requires a service action for the DHCP apparatus 304 will be described with reference to FIG. The maintenance procedure for the DHCP device 304 in the present embodiment is a DHCP setting change process.

First, the user terminal 300 _1, a message requesting the DHCP setting change, and transmits to the IPFE device 302 (step S20). IPFE device 302, the DSCP value corresponding to the user terminal 300 ₁ is applied to the IP header of the message received from the user terminal 300 ₁ (step S21). Then, the message with the DSCP value is transmitted to the web portal device 305 via the NAT device 303 (step S22). Load distribution server 307, the grant DSCP values to the received message, determines the service class of the user terminal 300 ₁ (step S23). Based on the determined service class and the load status of each of the business logic servers 309 _{1 to} 309 _n , the business logic server that executes the process requested by the user terminal 300 ₁ is selected (step S24). In this embodiment, the business logic server 309 ₁ is selected. In this case, the load distribution server 307 via the front-end server ₃₀₈₁ transmits a request for maintenance process to business logic server 309 ₁ (step S25). The business logic server 309 ₁ executes the DHCP setting change for the DHCP device 304 (step S26).

The business logic server 309 ₁ receives a response message regarding the result of the setting change from the DHCP device 304 (step S27). The business logic server 309 ₁ stores the contents of the DHCP configuration changes to the database server 310 (step S28). Then, the business logic server 309 ₁ transmits the received response message to the load distribution server 307 via the front-end server 308 ₁ (step S29). The load distribution server 307 adds the DSCP value of the user terminal 300 ₁ to the received response message, and transmits the response message to the user terminal 300 ₁ (step S30).

  Steps S23, S24, and S30 are respectively executed by the determination unit 312, the selection unit 313, and the HTTP transmission / reception unit 311 of the load distribution server 307 illustrated in FIG.

  As described above, in the present embodiment, the DSCP value of the user terminal is assigned to the maintenance process request message from the user terminal. Further, a business logic server that performs maintenance processing is selected based on the DSCP value of the user terminal. Therefore, it is possible to differentiate the maintenance performance of network devices such as DHCP devices according to users. Furthermore, in this embodiment, the priority information of the user terminal is also given to the maintenance process response message. For this reason, the process for sending the response message for the maintenance process can also be performed according to the user terminal. Therefore, the performance of a series of processes from when a user terminal sends a maintenance process request (uplink transmission) until receiving the maintenance process response (downlink transmission) is discriminated according to the priority information of the user terminal. Can be realized.

  In this embodiment, the determination unit 312 and the selection unit 313 have different configurations, but the selection unit 313 may also have the function of the determination unit 312.

In addition, the hardware specifications of the business logic servers 309 _{1 to} 309 _n in this embodiment may be uniform. However, since the hardware can be configured as a general-purpose product by virtualization, it may be configured with hardware having different specifications during operation. In this case, when the selection unit 313 selects a business logic server, not only the load status of each business logic server but also the hardware specifications of each business logic server may be considered.

  In addition, although the communication system in each embodiment mentioned above can be applied to the virtual system called a virtual BRAS system (vBRAS system) and a virtual CPE system (vCPE system), it is not restricted to this. In other words, the present invention can be applied to any system that has a maintenance device that aggregates network functions and performs maintenance processing of each aggregated function.

  Each process of the above-described embodiment may be executed by software. That is, a computer program for performing each process may be read and executed by a CPU (Central Processing Unit) included in the information processing apparatus. Even if each process is performed using a program, the same process as the process of the above-described embodiment can be performed. The above program may be stored in a non-transitory medium such as a ROM (Read Only Memory), a RAM (Random Access Memory), a semiconductor memory device such as a flash memory, an optical disk, a magnetic disk, or a magneto-optical disk. .

  A part or all of the above-described embodiment can be described as in the following supplementary notes, but is not limited thereto.

  (Additional remark 1) It is a communication system which provides a communication service with respect to the aggregated several terminal, Comprising: It has a 1st network apparatus and the maintenance apparatus which performs the maintenance process of said 1st network apparatus When the first network device receives a first message related to the maintenance processing request from a first terminal included in the plurality of terminals, the first priority corresponding to the first terminal A communication system that generates a second message to which information is added and transmits the second message to the maintenance device.

  (Supplementary Note 2) The maintenance device includes a selection unit and a plurality of processing execution units, and the selection unit receives the second message, based on the first priority information, The communication system according to appendix 1, wherein a process execution unit that performs the maintenance process is selected from a plurality of process execution units.

  (Supplementary Note 3) The maintenance device includes a transmission unit that transmits a third message related to a result of the maintenance process executed by the treatment execution unit selected by the selection unit to the first terminal, and The communication system according to attachment 2, wherein the first priority information is assigned to the third message.

(Supplementary Note 4) In addition to the first network device, the network device further includes a plurality of network devices, and the plurality of network devices includes a NAT device that performs NAT conversion in communication of the plurality of terminals, and DHCP of the plurality of terminals. A DHCP device that manages information, wherein the maintenance device further executes maintenance processing of the NAT device and the DHCP device;
The communication system according to any one of appendices 1 to 3.

  (Additional remark 5) It further has a management server which manages the plurality of terminals and priority information corresponding to each of the plurality of terminals, and the first network device receives the first priority from the management server. The communication system according to any one of appendices 1 to 4, wherein degree information is acquired.

  (Supplementary note 6) The communication system according to any one of supplementary notes 1 to 5, wherein the first network device is an IPFE device.

  (Supplementary note 7) The communication system according to any one of supplementary notes 1 to 6, wherein the first priority information is a DSCP value of the first terminal.

  (Additional remark 8) The said maintenance apparatus is a communication system as described in any one of additional marks 1 thru | or 7 which is a web portal apparatus.

  (Supplementary note 9) A network device in a communication system that provides communication services to a plurality of aggregated terminals, wherein a first request from the first terminal included in the plurality of terminals relates to a request for maintenance processing of the network device. A receiving unit that receives one message, and a message that generates a second message to which first priority information corresponding to the first terminal is assigned when the receiving unit receives the first message. A network device comprising: a generation unit; and a transmission unit that transmits the second message to a maintenance device that executes the maintenance process.

  (Supplementary Note 10) The communication system includes a management server that manages the plurality of terminals and priority information corresponding to each of the plurality of terminals, and the first network device receives the first information from the management server. The network device according to appendix 9, which acquires one priority information.

  (Supplementary note 11) The network device according to supplementary note 9 or 10, wherein the network device is an IPFE device.

  (Supplementary note 12) The network device according to any one of supplementary notes 9 to 11, wherein the first priority information is a DSCP value of the first terminal.

  (Supplementary Note 13) A maintenance device that executes maintenance processing of a network device in a communication system that provides communication services to a plurality of aggregated terminals, and includes a selection unit and a plurality of processing execution units, When the selection unit receives a message related to the maintenance process requested by the first terminal included in the plurality of terminals, the selection unit is based on the first priority information corresponding to the first terminal given to the message. A maintenance device that selects a process execution unit that performs the maintenance process from the plurality of process execution units.

  (Supplementary Note 14) The maintenance device includes a transmission unit that transmits a response message related to a result of the maintenance process executed by the treatment execution unit selected by the selection unit to the first terminal, and the response message includes: The maintenance device according to attachment 13, to which the first priority information is assigned.

  (Supplementary note 15) The maintenance device according to supplementary note 13 or 14, wherein the first priority information is a DSCP value of the first terminal.

  (Supplementary note 16) The maintenance device according to any one of supplementary notes 13 to 15, wherein the maintenance device is a web portal device.

  (Additional remark 17) It is the method in the communication system which provides a communication service with respect to the aggregated several terminal, Comprising: The 1st regarding the request | requirement of the maintenance process of a network apparatus from the 1st terminal contained in the said several terminal Receiving a message; generating a second message with first priority information corresponding to the first terminal when the first message is received; and the second message Transmitting the method.

  (Additional remark 18) It has a process which selects the process execution part which performs the said maintenance process from several process execution part based on said 1st priority information, when receiving said 2nd message. 18. The method according to 17.

  (Additional remark 19) It has the process of transmitting the 3rd message regarding the result of the said maintenance process which the said said treatment execution part performed, Said 1st priority information is provided to the said 3rd message The method according to appendix 18.

  (Supplementary note 20) Any one of Supplementary notes 17 to 19, including a step of acquiring the first priority information from a management server that manages the plurality of terminals and priority information corresponding to each of the plurality of terminals. The method according to one.

  (Supplementary note 21) The method according to any one of supplementary notes 17 to 20, wherein the first network device is an IPFE device.

  (Supplementary note 22) The method according to any one of supplementary notes 17 to 21, wherein the first priority information is a DSCP value of the first terminal.

  (Supplementary Note 23) In a communication system that provides communication services to a plurality of aggregated terminals, a first message regarding a request for maintenance processing of a network device is received from a first terminal included in the plurality of terminals. When receiving the first message, generating a second message to which the first priority information corresponding to the first terminal is assigned, and transmitting the second message A program that causes a computer to execute.

  (Supplementary Note 24) A computer-readable information storage medium that records the program according to Supplementary Note 23.

  The present invention has been described above using the above-described embodiment as an exemplary example. However, the present invention is not limited to the above-described embodiment. That is, the present invention can apply various modes that can be understood by those skilled in the art within the scope of the present invention.

  This application claims the priority on the basis of Japanese application Japanese Patent Application No. 2015-190852 for which it applied on September 29, 2015, and takes in those the indications of all here.

10, 20, 30 Communication system 100 _{1 to} 100 _M , 300 _{1 to} 300 _L User terminal 101 Network device 200, 305 Web portal device 201, 313 Selection unit 202 _{1 to} 202 _N processing execution unit 301 _{1 to} 301 _m CPE
302 IPFE device 303 NAT device 304 DHCP device 306 Management server 307 Load distribution server 308 _{1 to} 308 _n Front-end server 309 _{1 to} 309 _n Business logic server 310 Database server 311 HTTP transmission / reception unit 312 Determination unit 314 Communication unit

Claims (10)

A communication system that provides communication services to a plurality of aggregated terminals,
A first network device;
A maintenance device that executes maintenance processing of the first network device,
When the first network device receives a first message related to the maintenance processing request from a first terminal included in the plurality of terminals, first priority information corresponding to the first terminal Is generated, and the second message is transmitted to the maintenance device. The maintenance device includes a selection unit and a plurality of processing execution units,
The selection means, when receiving the second message, selects a process execution means for performing the maintenance process from the plurality of process execution means based on the first priority information. The communication system according to 1. The maintenance device includes a transmission unit that transmits a third message related to a result of the maintenance process executed by the treatment execution unit selected by the selection unit to the first terminal,
The communication system according to claim 2, wherein the first priority information is given to the third message. In addition to the first network device, further comprising a plurality of network devices,
The plurality of network devices include a NAT device that performs NAT conversion in communication of the plurality of terminals, and a DHCP device that manages DHCP information of the plurality of terminals,
The maintenance device further executes maintenance processing of the NAT device and the DHCP device.
The communication system according to any one of claims 1 to 3.   The communication system according to any one of claims 1 to 4, wherein the first network device is an IPFE device.   The communication system according to any one of claims 1 to 5, wherein the first priority information is a DSCP value of the first terminal.   The communication system according to any one of claims 1 to 6, wherein the maintenance device is a web portal device. A network device in a communication system that provides communication services to a plurality of aggregated terminals,
Receiving means for receiving, from a first terminal included in the plurality of terminals, a first message relating to a request for maintenance processing of the network device;
Message generating means for generating a second message to which first priority information corresponding to the first terminal is given when the receiving means receives the first message;
A network device, comprising: a transmission unit configured to transmit the second message to a maintenance device that executes the maintenance process. A maintenance device that executes maintenance processing of a network device in a communication system that provides communication services to a plurality of aggregated terminals,
A selection unit and a plurality of processing execution units;
When the selection unit receives a message related to the maintenance process requested by the first terminal included in the plurality of terminals, the selection unit adds the first priority information corresponding to the first terminal assigned to the message. A maintenance apparatus that selects a process execution unit for performing the maintenance process from the plurality of process execution units. A method in a communication system for providing a communication service to a plurality of aggregated terminals,
Receiving from the first terminal included in the plurality of terminals a first message relating to a network device maintenance processing request;
When receiving the first message, generate a second message with the first priority information corresponding to the first terminal,
A method of transmitting the second message.

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