WO2013178099A1

WO2013178099A1 - System, method, client and service centre for realizing remote desktop

Info

Publication number: WO2013178099A1
Application number: PCT/CN2013/077071
Authority: WO
Inventors: 李可; 缪敬; 张兵; 马力
Original assignee: 中兴通讯股份有限公司
Priority date: 2012-08-29
Filing date: 2013-06-09
Publication date: 2013-12-05
Also published as: CN103634364B; CN103634364A

Abstract

Disclosed is a system for realizing a remote desktop, comprising: a client for sending a virtual machine application message and a remote desktop protocol packet to a router and receiving a response; a router for forwarding a virtual machine application message and a remote desktop protocol packet to a remote desktop proxy server, receiving a response and forwarding same to the client; a remote desktop proxy server for notifying a virtual machine management console to create a virtual machine after receiving a virtual machine application message and receiving a response, and establishing and storing the correlation between the client and the virtual machine, and after receiving a remote desktop protocol packet, forwarding same to the corresponding virtual machine; a virtual machine management console for creating a virtual machine and returning virtual machine information; and a virtual machine for processing a remote desktop protocol packet and returning a response to the client via the router. The present invention reduces the demand for a public network IP address, and is favourable to the deployment and operation of a remote desktop service. Also disclosed are a method, client and service centre for realizing a remote desktop.

Description

System, method, client and service center for realizing remote desktop

Technical field

The present invention relates to the field of network communication technologies, and in particular, to a system, method, client, and service center for implementing a remote desktop.

Background technique

Today, with the popularity of cloud technologies and the increasing performance of smart terminals (such as smart phones and cable set-top boxes) and the increasing network bandwidth, users are increasingly demanding smart terminals. Users want to be able to do things on the smart terminal that can only be done on a PC, such as using various computer software and playing various computer games. The remote desktop based on the cloud technology can meet the above requirements of the user for the smart terminal. When the client needs to use the remote desktop, the virtual machine can be dynamically allocated to the client through the cloud technology, and the client can perform various operations by remotely accessing the virtual machine. .

As shown in Figure 1, in the cloud-based remote desktop system implementation solution, each client needs to be connected to a corresponding virtual machine (one client corresponds to one virtual machine), according to the existing scheme, each The virtual machine will use a public IP address for client access. The demand for public IP is quite large, which is very unfavorable for operating costs and network deployment. As shown in Figure 2, although a public network IP can be used to correspond to multiple virtual machines through a proxy server, the existing proxy servers cannot satisfy the large data volume service agents such as remote desktops, and a large amount of downlink data will greatly exceed the existing ones. The ability of a proxy server.

Therefore, in order to solve the above problems faced by existing remote desktop systems, a new remote desktop solution is needed.

Summary of the invention

The embodiments of the present invention provide a system, a method, a client, and a service center for implementing a remote desktop, which can greatly reduce the requirement of a remote desktop system for a public network IP address, and facilitate deployment and operation of a cloud-based remote desktop service.

In order to solve the above technical problem, an embodiment of the present invention provides a system for implementing a remote desktop. System, the system includes:

The client is configured to send a virtual machine application message carrying the client information to the router after detecting that the user opens the remote desktop application, and if receiving the virtual machine application success response message, sending the client information to the router according to the user indication. Remote Desktop Protocol message, and then receive a remote desktop protocol response;

The router is configured to: after receiving the virtual machine application message carrying the client information, forwarding the virtual machine application message to the remote desktop proxy server, and if receiving the virtual machine application success response message, forwarding the virtual to the client After receiving the remote desktop protocol packet carrying the client information, the remote desktop protocol packet is forwarded to the remote desktop proxy server, and if the remote desktop protocol response returned by the virtual machine is received, The client forwards the remote desktop protocol response;

The remote desktop proxy server is configured to: after receiving the virtual machine application message carrying the client information, notify the virtual machine management console to create a virtual machine, and if the virtual machine creates a success response message carrying the virtual machine information, the router passes the router. Returning the virtual machine application success response message to the client, establishing and saving the correspondence between the client and the newly created virtual machine; and, after receiving the remote desktop protocol message carrying the client information, if the client is queried The corresponding virtual machine forwards the remote desktop protocol packet to the virtual machine corresponding to the client;

a virtual machine management console, configured to create a virtual machine after receiving the notification of creating the virtual machine, and if the creation is successful, return a virtual machine creation success response message carrying the virtual machine information to the remote desktop proxy server;

The virtual machine is configured to parse and process the remote desktop protocol packet carrying the client information, and the processing result is carried in the remote desktop protocol response and returned to the client through the router.

The client is further configured to send a virtual machine shutdown message carrying the client information to the router after obtaining the indication that the user closes the remote desktop application, and exit the remote desktop application if receiving the virtual machine shutdown success response message;

The router is further configured to: after receiving the virtual machine shutdown message carrying the client information, forwarding the virtual machine shutdown message to the remote desktop proxy server, and receiving the virtual machine shutdown success response message returned by the remote desktop proxy server, to the client End forwarding the virtual machine to close the successful response Interest rate

The remote desktop proxy server is further configured to notify the virtual machine management console to release the virtual machine corresponding to the client after receiving the virtual machine shutdown message carrying the client information, and if receiving the virtual machine release success response message, The client returns a virtual machine shutdown success response message, and clears the correspondence between the client and the virtual machine;

The virtual machine management console is further configured to release the virtual machine after receiving the notification of releasing the virtual machine corresponding to the client, and if the release is successful, return a virtual machine release success response message to the remote desktop proxy server.

The client information includes any of the following information: client IP address, client IP address, and client registration identifier;

The virtual machine information includes a virtual machine IP address;

The correspondence between the client and the newly created virtual machine includes any of the following methods:

a) the correspondence between the client IP address and the virtual machine IP address;

b) Correspondence between the client IP address and the client registration identifier and the virtual machine IP address.

The router is connected to the local area network and the public network. The remote desktop proxy server, the virtual machine management console, and the virtual machine are all in the local area network and use the private network IP address. The client is on the public network and uses the public network IP address. An embodiment of the present invention further provides a method for implementing a remote desktop, including:

After detecting that the user opens the remote desktop application, the client sends a virtual machine application message carrying the client information to the router;

After receiving the virtual machine application message carrying the client information, the router forwards the virtual machine application message to the remote desktop proxy server;

After receiving the virtual machine application message carrying the client information, the remote desktop proxy server notifies the virtual machine management console to create a virtual machine; after receiving the notification of creating the virtual machine, the virtual machine management console creates a virtual machine, and if the creation is successful, The remote desktop proxy server returns a virtual machine creation success response message carrying the virtual machine information; if the remote desktop proxy server receives the virtual machine that carries the virtual machine information, the successful creation response is cancelled. And returning the virtual machine application success response message to the client through the router, establishing and saving the correspondence between the client and the newly created virtual machine;

If the router receives the virtual machine application success response message, the router forwards the virtual machine application success response message to the client;

After receiving the virtual machine application success response message, the client sends a remote desktop protocol packet carrying the client information to the router according to the user indication.

After receiving the remote desktop protocol packet carrying the client information, the router forwards the remote desktop protocol packet to the remote desktop proxy server.

After receiving the remote desktop protocol packet carrying the client information, the remote desktop proxy server forwards the remote desktop protocol packet to the virtual machine corresponding to the client, for example, if the virtual machine corresponding to the client is queried;

After receiving the remote desktop protocol packet carrying the client information, the virtual machine parses and processes the packet, and the processing result is carried in the remote desktop protocol response and returned to the client through the router. The router receives the remote desktop returned by the virtual machine. Responding to the protocol, forwarding the remote desktop protocol response to the client;

The client receives a remote desktop protocol response. The method also includes:

After obtaining the indication that the user closes the remote desktop application, the client sends a virtual machine shutdown message carrying the client information to the router;

After receiving the virtual machine shutdown message carrying the client information, the router forwards the virtual machine shutdown message to the remote desktop proxy server;

After receiving the virtual machine shutdown message carrying the client information, the remote desktop proxy server notifies the virtual machine management console to release the virtual machine corresponding to the client;

The virtual machine management console releases the virtual machine after receiving the notification of releasing the virtual machine corresponding to the client, and if the release is successful, returns a virtual machine release success response message to the remote desktop proxy server;

If the remote desktop proxy server receives the virtual machine release success response message, it passes through the router. Returning a virtual machine shutdown success response message to the client, clearing the correspondence between the client and the virtual machine; if the router receives the virtual machine shutdown success response message, forwarding the virtual machine shutdown success response message to the client;

If the client receives the virtual machine shutdown success response message, it exits the remote desktop application.

The client information includes any one of the following information: a client IP address, a client IP address, and a client registration identifier; the virtual machine information includes a virtual machine IP address;

The router is connected to the local area network and the public network. The remote desktop proxy server, the virtual machine management console, and the virtual machine are all in the local area network and use the private network IP address. The client is on the public network and uses the public network IP address. An embodiment of the present invention further provides a client for implementing a remote desktop, including:

The remote desktop application opening module is configured to send a virtual machine application message carrying the client information to the router after detecting that the user opens the remote desktop application, and if the virtual machine application success response message is received, the remote desktop protocol processing module is enabled;

a remote desktop protocol processing module, configured to send a remote desktop protocol message carrying the client information to the router according to the user indication, and receive the remote desktop protocol response;

The remote desktop application shutdown module is configured to send a virtual machine shutdown message carrying the client information to the router after obtaining the indication that the user closes the remote desktop application, and exit the remote desktop application if receiving the virtual machine shutdown success response message. An embodiment of the present invention further provides a service center for implementing a remote desktop, including:

The router is configured to: after receiving the virtual machine application message that is sent by the client and carrying the client information, forward the virtual machine application message to the remote desktop proxy server, and if receiving the virtual machine application success response message, send the message to the client Forwarding the virtual machine application success response message; and, After receiving the remote desktop protocol packet that is sent by the client and carrying the client information, the remote desktop protocol packet is forwarded to the remote desktop proxy server, and if the remote desktop protocol response returned by the virtual machine is received, the client forwards the message to the client. Remote desktop protocol response;

The router is further configured to: after receiving the virtual machine shutdown message sent by the client and carrying the client information, forwarding the virtual machine shutdown message to the remote desktop proxy server, for example, receiving the virtual machine shutdown success response message returned by the remote desktop proxy server Transmitting the virtual machine shutdown success response message to the client;

The remote desktop proxy server is further configured to: after receiving the virtual machine shutdown message carrying the client information, notify the virtual machine management console to release the virtual machine corresponding to the client, and if receiving the virtual machine release success response message, pass the router Returning a virtual machine shutdown success response message to the client, and clearing the correspondence between the client and the virtual machine;

The client information includes any of the following information: client IP address, client IP address, and client registration identifier; The virtual machine information includes a virtual machine IP address;

The mapping between the client and the newly created virtual machine includes any one of the following methods: a) Correspondence between the IP address of the client and the IP address of the virtual machine;

The router is connected to the local area network and the public network. The remote desktop proxy server, the virtual machine management console, and the virtual machine are all in the local area network and use the private network IP address. The client is on the public network and uses the public network IP address.

Compared with related technologies, a system, a method, a client, and a service center for implementing a remote desktop provided by an embodiment of the present invention can enable multiple virtual machines in a local area network to be used by customers in a public network by using a remote desktop proxy server. The service is provided by the router, and the remote desktop protocol response packet returned by the virtual machine in the local area network is directly forwarded to the client through the router instead of the remote desktop proxy server. The remote desktop proxy server is prevented from being the forwarding bottleneck of the large-data-receiving remote desktop protocol response packet, which reduces the demand for the public network IP address of the remote desktop system, and facilitates the deployment and operation of the cloud-based remote desktop service. BRIEF abstract

1 is a schematic diagram of a remote desktop system in the related art.

2 is a schematic diagram of another remote desktop system implemented by proxy server technology in the related art.

FIG. 3 is a schematic diagram of a system for implementing a remote desktop according to an embodiment of the present invention.

FIG. 4 is a schematic diagram of message interaction in a method for implementing a remote desktop according to an embodiment of the present invention. FIG. 5 is a schematic structural diagram of a client implementing a remote desktop according to an embodiment of the present invention. Preferred embodiment of the invention

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that In the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other. As shown in FIG. 3, an embodiment of the present invention provides a system for implementing a remote desktop, where the system includes:

The router is configured to: after receiving the virtual machine application message carrying the client information, forwarding the virtual machine application message to the remote desktop proxy server, and if receiving the virtual machine application success response message, forwarding the virtual to the client After receiving the remote desktop protocol packet carrying the client information, the remote desktop protocol packet is forwarded to the remote desktop proxy server, and if the remote desktop protocol response returned by the virtual machine is received, the client sends the response message to the client. Forwarding the remote desktop protocol to respond;

The remote desktop proxy server is configured to: after receiving the virtual machine application message carrying the client information, notify the virtual machine management console to create a virtual machine, and if the virtual machine creates a success response message carrying the virtual machine information, the router passes the router. Returning the virtual machine application success response message to the client, establishing and saving the correspondence between the client and the newly created virtual machine; after receiving the remote desktop protocol message carrying the client information, if the query is corresponding to the client The virtual machine forwards the remote desktop protocol packet to the virtual machine corresponding to the client;

Wherein, the system further includes the following features:

The client is further configured to send a virtual machine shutdown message carrying the client information to the router after obtaining the indication that the user closes the remote desktop application, and if receiving the virtual machine shutdown success response message, Exit the remote desktop application;

The router is further configured to: after receiving the virtual machine shutdown message carrying the client information, forwarding the virtual machine shutdown message to the remote desktop proxy server, and receiving the virtual machine shutdown success response message returned by the remote desktop proxy server, to the client Forwarding the virtual machine shutdown success response message; the remote desktop proxy server is further configured to notify the virtual machine management console to release the virtual machine corresponding to the client after receiving the virtual machine shutdown message carrying the client information, such as receiving the virtual After the device releases the success response message, the router returns a virtual machine shutdown success response message to the client, and clears the correspondence between the client and the virtual machine.

Wherein, the system further includes the following features:

The client information includes any of the following information: client IP address, client IP address, and client registration ID. The virtual machine information includes a virtual machine IP address;

The client registration identifier is, for example, the account information obtained after the user registers.

Wherein, the system further includes the following features:

The router is connected to the local area network and the public network. The remote desktop proxy server, the virtual machine management console, and the virtual machine are all in the local area network and use the private network IP address. The client is in the public network and uses the public network IP address.

The remote desktop protocol is, for example, the Microsoft Remote Desktop Protocol (RDP), and the Simple Protocol for Independent Computing Environment (SPICE). As shown in FIG. 4, the embodiment of the present invention further provides A method for implementing a remote desktop, the method Includes:

5101. After detecting that the user opens the remote desktop application, the client sends a virtual machine application message carrying the client information to the router.

After receiving the virtual machine application message carrying the client information, the router forwards the virtual machine application message to the remote desktop proxy server.

5103. After receiving the virtual machine application message carrying the client information, the remote desktop proxy server notifies the virtual machine management console to create the virtual machine.

5104. After the virtual machine management console receives the notification of creating the virtual machine, the virtual machine is created. If the virtual machine is successfully created, the virtual machine that generates the virtual machine information is successfully returned to the remote desktop proxy server.

5105. If the remote desktop proxy server receives the virtual machine creation success response message carrying the virtual machine information, the router returns a virtual machine application success response message to the client, and establishes and saves the correspondence between the client and the newly created virtual machine. Relationship

5106. If the router receives the virtual machine application success response message, the router forwards the virtual machine application success response message to the client.

5107. After receiving the virtual machine application success response message, the client sends a remote desktop protocol packet carrying the client information to the router according to the user indication.

S109: After receiving the remote desktop protocol packet carrying the client information, the remote desktop proxy server forwards the remote desktop protocol packet to the virtual machine corresponding to the client, if the virtual machine corresponding to the client is queried;

5110. After receiving the remote desktop protocol packet carrying the client information, the virtual machine parses and processes the packet, and the processing result is carried in the remote desktop protocol response and returned to the client through the router.

5111. The router receives the remote desktop protocol response returned by the virtual machine, and forwards the remote desktop protocol response to the client.

5112, the client receives a remote desktop protocol response; 5113. After obtaining the indication that the user closes the remote desktop application, the client sends a virtual machine shutdown message carrying the client information to the router.

5114. After receiving the virtual machine shutdown message carrying the client information, the router forwards the virtual machine shutdown message to the remote desktop proxy server.

S115. After receiving the virtual machine shutdown message carrying the client information, the remote desktop proxy server notifies the virtual machine management console to release the virtual machine corresponding to the client.

S116, the virtual machine management console releases the virtual machine after receiving the notification of releasing the virtual machine corresponding to the client, and if the release is successful, returning the virtual machine release success response message to the remote desktop proxy server;

S117. If the remote desktop proxy server receives the virtual machine release success response message, the router returns a virtual machine shutdown success response message to the client, and clears the correspondence between the client and the virtual machine.

S118. The router forwards the virtual machine shutdown success response message to the client, if receiving the virtual machine shutdown success response message;

S119. If the client receives the virtual machine shutdown success response message, the client exits the remote desktop application. The method further includes the following features:

b) Correspondence between the client IP address and the client registration identifier and the virtual machine IP address. The method further includes the following features:

The router is connected to the local area network and the public network. The remote desktop proxy server, the virtual machine management console, and the virtual machine are all in the local area network and use the private network IP address. The client is in the public network and uses the public network IP address. As shown in FIG. 5, an embodiment of the present invention further provides a client for implementing a remote desktop, where the client includes:

The remote desktop application shutdown module is configured to send a virtual machine shutdown message carrying the client information to the router after obtaining the indication that the user closes the remote desktop application, and exit the remote desktop application if receiving the virtual machine shutdown success response message. The embodiment of the present invention further provides a service center for implementing a remote desktop service, including: a router, configured to: after receiving a virtual machine application message that is sent by the client and carrying the client information, forwarding the message to the remote desktop proxy server The virtual machine application message, if the virtual machine application success response message is received, forwards the virtual machine application success response message to the client; after receiving the remote desktop protocol message sent by the client, the client sends the remote desktop protocol message to the remote desktop. Forwarding, by the proxy server, the remote desktop protocol packet, if receiving the remote desktop protocol response returned by the virtual machine, forwarding the remote desktop protocol response to the client;

The virtual machine is configured to parse and process the packet after receiving the remote desktop protocol packet carrying the client information, and the processing result is carried in the remote desktop protocol response and returned by the router. To the client. Among them, the service center further includes the following features:

The virtual machine management console is further configured to release the virtual machine after receiving the notification of releasing the virtual machine corresponding to the client, and if the release is successful, return a virtual machine release success response message to the remote desktop proxy server. Among them, the service center further includes the following features:

b) Correspondence between the client IP address and the client registration identifier and the virtual machine IP address. Among them, the service center further includes the following features:

The router is connected to the local area network and the public network. The remote desktop proxy server, the virtual machine management console, and the virtual machine are all in the local area network and use the private network IP address. The client is in the public network and uses the public network IP address. The system, the method, the client, and the service center for implementing the remote desktop provided by the foregoing embodiment, by using the remote desktop proxy server, can enable multiple virtual machines in the local area network to be in the public network. The client provides services by deploying a router between the public network and the local area network to forward data. The remote desktop protocol response packet returned by the virtual machine in the local area network is forwarded directly to the client through the router instead of the remote desktop proxy server. The remote desktop proxy server can be prevented from being the forwarding bottleneck of the large-data-receiving remote desktop protocol response packet, which reduces the demand for the public network IP address of the remote desktop system, and facilitates the deployment and operation of the cloud-based remote desktop service. In addition, through the control of the virtual machine management console, the remote desktop proxy server makes the virtual machine resources rationally utilized and allocated on demand, which greatly improves resource utilization efficiency.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be accomplished by a program instructing the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk. Optionally, all or part of the steps of the foregoing embodiments may also be implemented by using one or more integrated circuits. Accordingly, each module/unit in the foregoing embodiment may be implemented in the form of hardware, or may use software functions. The form of the module is implemented. The invention is not limited to any specific form of combination of hardware and software.

It is to be understood that the invention may be embodied in other forms and modifications without departing from the spirit and scope of the invention.

Industrial applicability

Compared with the related technologies, the system, the method, the client, and the service center for implementing the remote desktop provided by the embodiments of the present invention reduce the requirement of the remote desktop system for the public network IP address, and facilitate the deployment of the cloud-based remote desktop service. And operation, and make the virtual machine resources be rationally utilized, allocated on demand, greatly improving resource utilization efficiency.

Claims

Claim

1. A system for implementing a remote desktop, comprising:

2. The system of claim 1 wherein

The client is further configured to send a virtual machine shutdown message carrying the client information to the router after obtaining the indication that the user closes the remote desktop application, such as receiving the virtual machine shutdown success response message. Then exit the remote desktop application;

The router is further configured to: after receiving the virtual machine shutdown message carrying the client information, forwarding the virtual machine shutdown message to the remote desktop proxy server, if receiving the virtual machine shutdown success response message returned by the remote desktop proxy server, Forwarding the virtual machine shutdown success response message to the client;

The remote desktop proxy server is further configured to notify the virtual machine management console to release the virtual machine corresponding to the client after receiving the virtual machine shutdown message carrying the client information, and if the virtual machine release success response message is received, The router returns a virtual machine shutdown success response message to the client, and clears the correspondence between the client and the virtual machine;

3. The system according to claim 1 or 2, wherein

The virtual machine information includes a virtual machine IP address;

4. The system of claim 1 or 2, wherein

5. A method for implementing a remote desktop, comprising:

After detecting that the user opens the remote desktop application, the client sends a virtual machine application message carrying the client information to the router; After receiving the virtual machine application message carrying the client information, the router forwards the virtual machine application message to the remote desktop proxy server;

After receiving the virtual machine application message carrying the client information, the remote desktop proxy server notifies the virtual machine management console to create a virtual machine; after receiving the notification of creating the virtual machine, the virtual machine management console creates a virtual machine, and if the creation is successful, The remote desktop proxy server returns a virtual machine creation success response message carrying the virtual machine information; if the remote desktop proxy server receives the virtual machine creation success response message carrying the virtual machine information, the router returns a virtual machine application success response message to the client through the router. Establishing and saving a correspondence between the client and the newly created virtual machine;

The client receives a remote desktop protocol response.

6. The method of claim 5, further comprising:

After receiving the virtual machine shutdown message carrying the client information, the router sends the remote desktop agent service. Transmitting the virtual machine shutdown message;

If the remote desktop proxy server receives the virtual machine release success response message, the router returns a virtual machine shutdown success response message to the client, and clears the correspondence between the client and the virtual machine; if the router receives the virtual machine shutdown success response message, And forwarding, to the client, the virtual machine shutdown success response message;

7. The method according to claim 5 or 6, wherein

8. The method according to claim 5 or 6, wherein

9. A client that implements remote desktop, including:

The remote desktop application opening module is configured to send a virtual machine application message carrying the client information to the router after detecting that the user opens the remote desktop application, and if the virtual machine application success response message is received, the remote desktop protocol processing module is enabled; a remote desktop protocol processing module, configured to send a remote desktop protocol message carrying the client information to the router according to the user indication, and receive the remote desktop protocol response;

The remote desktop application shutdown module is configured to send a virtual machine shutdown message carrying the client information to the router after obtaining the indication that the user closes the remote desktop application, and exit the remote desktop application if receiving the virtual machine shutdown success response message.

10. A service center that implements remote desktops, including:

The router is configured to: after receiving the virtual machine application message that is sent by the client and carrying the client information, forward the virtual machine application message to the remote desktop proxy server, and if receiving the virtual machine application success response message, send the message to the client Forwarding the virtual machine application success response message; and, after receiving the remote desktop protocol message sent by the client and carrying the client information, forwarding the remote desktop protocol message to the remote desktop proxy server, if the virtual machine returns Remote desktop protocol response, then forwarding the remote desktop protocol response to the client;

11. The service center according to claim 10, wherein

The router is further configured to: after receiving the virtual machine shutdown message sent by the client and carrying the client information, forwarding the virtual machine shutdown message to the remote desktop proxy server, if the virtual machine returned by the remote desktop proxy server is successfully closed Responding to the message, forwarding the virtual to the client The machine closes the success response message;

The remote desktop proxy server is further configured to: after receiving the virtual machine shutdown message carrying the client information, notify the virtual machine management console to release the virtual machine corresponding to the client, if receiving the virtual machine release success response message, Returning a virtual machine shutdown success response message to the client through the router, and clearing the correspondence between the client and the virtual machine;

12. The service center according to claim 10 or 11, wherein

13. The service center according to claim 10 or 11, wherein