KR20040048714A - Method for Providing Server/Proxy Information in the Communication Network - Google Patents

Abstract

PURPOSE: A method for providing server/proxy information in a communication network is provided to offer information for various servers and proxies to clients newly connected to a communication network. CONSTITUTION: A router or a specific server, a system in which a user process is executed, stores and manages the information of a server/proxy and the information of a plurality of servers and proxies. The user process distributes associated server/proxy information to clients by using an SAM(Server Advertisement Message) to provide its own information, server/proxy information, in a server discover message. A node, where the clients are located, makes a request for server/proxy information using an SSM(Server Solicitation Message). The node analyzes received server/proxy information and transfers it to a client. The client executes necessary setup using the server/proxy information.

Description

How to provide server / proxy information in the communication network {Method for Providing Server / Proxy Information in the Communication Network}

The present invention relates to a method for providing server / proxy information in a communication network, and more particularly, to a method for providing server / proxy information in a communication network to provide information about various servers and proxies used in the communication network to a client newly connected to the communication network.

In a general local network, a server or proxy that is used for various purposes such as POP3, SMTP, HTTP, and RTSP is installed or used on the Internet. In order to use various services provided by the server or proxy, a user is required. You must install the client.

In addition, the user must know the information about the server or proxy in advance, and the information about the server or proxy must be set directly on the client.

On the other hand, a node newly connected to the local network, that is, a network user, sends information about a router address, its temporary address, and a DNS server address to an ICMP router discovery message or DHCP. Can be acquired automatically using the protocol. Therefore, basic network setting is possible without the direct involvement of the user.

However, in order to receive other services, the user must obtain information about a server or proxy that provides each service in advance, and then set the information directly to the corresponding client.

In other words, in a conventional local network, when a freely moving network node accesses a new local network and wants to be provided with the service of the Internet or a server-client environment provided by the Internet, the network node must first be a server or a server. You must collect offline about the IP address for the proxy, the TCP / UDP port to be used for the service, and other information required for each service, and collect the information on the collected server or proxy directly to the client. Must be set

As described above, in the conventional local network, the operation until the newly connected node is provided with the desired service has to go through a very complicated process, and there is an inconvenience that the user must have some technical knowledge about the service in advance.

In other words, the user is required a method for receiving a desired service through a local network with a simple authentication process without complicated configuration process or technical knowledge.

SUMMARY OF THE INVENTION The present invention provides a method for providing server / proxy information in a communication network to provide information about various servers and proxies used in the communication network to a client newly connected to the communication network. Its purpose is.

In addition, the present invention provides information about various servers and proxies used in a communication network to a client newly connected to the communication network, so that the client can automatically set the settings of the server and the proxy without user assistance.

In addition, in the present invention, when a freely moving network node is connected to a new communication network and wants to receive a service of the Internet or a server-client environment provided by the Internet, an IP address, a TCP / UDP port, By automatically providing the client with other information necessary for each service, it eliminates the inconvenience of having to collect the information directly or have specialized knowledge about the service in order to provide the desired service. Its purpose is to make it possible.

In addition, the present invention can be adapted to the network connection of the mobile users in a mobile environment, such as wireless LAN, the mobile terminal's IP data service, PDA wireless data service that is free to move the terminal, so that the wireless node is moved to another subnetwork ( It is useful when accessing a subnetwork, when a business needs to travel to multiple sites, when accessing a site's network and using local servers, or when an office's network layout changes. There is a purpose.

1 is a diagram illustrating a configuration for providing server / proxy information in a local network according to an exemplary embodiment of the present invention.

2 is an exemplary diagram illustrating a server discovery message as an extension of a router discovery message in FIG.

3 is a flowchart illustrating a method of providing server / proxy information in a local network according to an embodiment of the present invention.

4 is a diagram illustrating a configuration for providing server / proxy information in a mobile communication network according to another exemplary embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

11: Server and Proxy 12: Internet

13: Router 14-1, 14-2: Client

15: server 16: proxy

According to an embodiment of the present invention, a method for providing server / proxy information in a local network according to an embodiment of the present invention requests information about a server or proxy used in a communication network using a server discovery message in a first system where a client is present. Process of doing; Receiving the information request in a second system in which a user process is implemented and distributing the server or proxy information using a server discovery message; And receiving and analyzing the server or proxy information in the first system and delivering the server or proxy information to a corresponding client to perform necessary settings.

Preferably, the information request process is a predetermined time for the server solicitation message (SSM) of the server discovery message in the first system when any client accesses a new network or when any client is loaded. Transmitting a predetermined number of times at intervals; Confirming reception of a server advertisement message (SAM) in the server discovery message by the first system; And stopping the transmission of the SSM when the SAM is received by the first system.

Also preferably, the SSM includes information on the type of message, and the SAM may include a server IP address, a TCP / UDP port, information required for other services, a flag for distinguishing a server from a proxy, a type of message, and information. Contains information about the lifetime, the length of the total message, the number of entries indicating the number of server information delivered, the entry type indicating the type of each server, and the length of the entry indicating the length of each server information. In case of necessary information, it is characterized by storing by option for each service.

Further preferably, the setting process may include receiving a new SAM from the client and comparing the existing information with the information in the corresponding SAM to reset the changed contents.

Alternatively, a method for providing server / proxy information in a local network according to another embodiment of the present invention may include: periodically distributing information about a server or a proxy by using a server discovery message in a second system in which a user process is implemented; And receiving and analyzing the server or proxy information from the first system in which the client is located and delivering the same to the corresponding client to perform necessary settings. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the local network according to an embodiment of the present invention, the configuration for providing server / proxy information includes a server and proxy 11, an internet 12, a router 13, and a plurality of clients, as shown in FIG. 1. (14-1, 14-2), a plurality of servers (15), and a plurality of proxies (16), a user process for performing management functions for the corresponding server / proxy information; In this case, the clients 14-1 and 14-2 having the automatic setting function are implemented.

At this time, the server / proxy information is managed by a network administrator. The server / proxy information is stored and managed in the router 13 or a specific server in the local network, and the client is managed according to the information delivery procedure. User processes in the form of daemons that perform functions distributed to (14-1, 14-2) are implemented. In addition, the node in which the corresponding clients 14-1 and 14-2 are located analyzes the server / proxy information received from the local network and delivers the same to the corresponding clients 14-1 and 14-2. , 14-2) implements a function to perform necessary settings using the corresponding server / proxy information.

FIG. 1 is a diagram for describing a server discovery operation in a case where a function for providing server / proxy information is implemented in the corresponding router 13. Here, the server discovery operation uses the ICMP router discovery message, and applies the server discovery message as an extension of the router discovery message among the ICMP functions currently used. In this case, it is a suitable method when implemented in a router. .

2 is a diagram illustrating a message format to which a server discovery message is applied as an extension of a router discovery message in an ICMP function.

Meanwhile, a configuration for providing server / proxy information in a local network according to another embodiment of the present invention is implemented by implementing an independent application that performs a server search operation using a UDP port. In this case, a specific server This is the appropriate method when implemented in.

In the system in which the user process is implemented, that is, the router 13 or the specific server, information of the server and the proxy 11, the server 15, and the proxy 16 used in the local network is stored and managed. It distributes the corresponding server / proxy information to the clients 14-1 and 14-2 by using a SAM (Server Advertisement Message) for notifying information of the server (ie, server / proxy information).

The system where the clients 14-1 and 14-2 are located, that is, the node where the clients 14-1 and 14-2 are located, receives a server solicitation message (SSM) for requesting server / proxy information in a server discovery message. By using the server / proxy information request, the server / proxy information received from the network is analyzed and delivered to the client (14-1, 14-2). Accordingly, the clients 14-1 and 14-2 perform necessary settings using the corresponding server / proxy information.

A method of providing server / proxy information in a local network according to an embodiment of the present invention will be described with reference to the flowchart of FIG. 3.

First, it is implemented in the system where the client is located (that is, the node where the client is located), and the node requests information about servers (or proxies) used in the local network by using SSM in the server discovery message (step S1).

In other words, when an arbitrary client connects to a new network or when an arbitrary client is loaded, the SSM in the server search message is a predetermined number of times (e.g., 3 seconds) at intervals (e.g., 3 seconds). Times). At this time, it checks whether SAM is received among server discovery messages and stops SSM transmission when the SAM is received. At this time, the SSM includes information on the type of message.

Therefore, it is implemented in a system (i.e., a router or a specific server) in which a user process is implemented. The router or a specific server stores and manages information about servers (or proxies) used in the local network, and manages SSM from the node. Received (step S2) or periodically distributes the information to the system where the client is located (that is, the node where the client is located) using the SAM of the server discovery message (step S3).

Accordingly, it is implemented in the system where the client is located (ie, the node where the client is located), which receives information about servers (or proxies) from the network (step S4).

That is, the node must wait for the SAM among server discovery messages that are periodically transmitted. At this time, when the SAM is not received such that a default life time has elapsed, information of the server loses validity.

Then, the node analyzes the information about the server (or proxy) and delivers it to the client (step S5).

Then, the client performs the necessary setting using the information about the servers (or proxies) received from the node (step S6). At this time, the client compares the server information received from the new SAM with the previously stored information and resets the changed contents.

The information distributing step of the third step S3 will be described in more detail as follows.

The user process implemented in the system (ie, router or specific server) stores information about servers (or proxies) used in the local network in a table, and periodically the server (or proxies) It reads the information and distributes the information to the client using SAM in the server discovery message.

In this case, as shown in FIG. 2, the SAM includes information of servers (or proxies) used in the local network, that is, IP addresses of servers, TCP / UDP ports, information required for other services, and the like. In addition, a flag that distinguishes a server from a proxy, a message type, a life time indicating the validity period of the information, a total message length, an entry number of server information transmitted, and a type of each server. It further includes information such as an entry type, an entry length which is a length of each server information. In addition, in case of information necessary only for a specific service, it is prescribed by service and processed as an option.

The SAM is delivered to all clients in the local network using broadcast or multicast. The SSM transmission cycle is normally performed at a predetermined time (for example, 450 to 600 seconds). And, it can be changed according to the environment of the local network, the default life time of the SSM is a predetermined time (for example, 30 minutes).

Alternatively, user processes implemented within a system (i.e., a router or a specific server) may receive SSMs in server discovery messages from the system where the client is located (i.e., the node where the client is located). Instantly reads information about the server (or proxy) and distributes the information to clients using SAM in server discovery messages. In this case, unicast is used to deliver only to the client.

Meanwhile, a configuration for providing server / proxy information in a mobile communication network according to another embodiment of the present invention may include a server, a proxy 41, an internet 42, and a PDSN (Packet Data) as shown in FIG. 4. Service node / router 43, a plurality of mobile nodes 44, a plurality of servers 45, and a plurality of proxies 46.

In other words, in a wireless IP data service environment of a mobile communication or PDA, when servers (or proxies) are created to provide new services to the mobile node 44, the mobile node 44 is responsible for the client of the desired service. By downloading and running, you can freely connect to the server (or proxy) on the go.

In addition, a process for performing a server discovery operation, that is, a user process performing management functions for the corresponding server / proxy information, may exist in a Radio Access Network (RAN) or a PDSN, or exist in a higher router, and each mobile Node 44 is configured to download a client with an automatic configuration function.

In the mobile communication network according to another embodiment of the present invention, the method for providing server / proxy information is the same as that of the above-described method, and thus description thereof will be omitted.

As described above, according to the present invention, by providing information about various servers and proxies used in the communication network to a client newly connected to the communication network, the client can automatically set the settings of the server and the proxy without user's assistance, Service can be provided only through authentication.

In addition, according to the present invention, by making it suitable for network access of mobile users in a wireless environment, when a wireless node moves and accesses a different subnetwork, it is necessary to access a local network by accessing a communication network of a site when it is necessary to travel to various sites. This can be useful when needed or when the network layout of an office has changed.

Claims (5)

Requesting information about a server or proxy used in a communication network by using a server discovery message in a first system having a client; Receiving the information request in a second system in which a user process is implemented and distributing the server or proxy information using a server discovery message; And receiving the server or the proxy information from the first system, analyzing the server or the proxy information, and transmitting the same to the corresponding client to perform the necessary setting. The method of claim 1, The information request process includes a predetermined number of times of a server solicitation message (SSM) in the server discovery message in the first system at a predetermined time interval when an arbitrary client accesses a new network or when an arbitrary client is loaded. Transmitting; Confirming reception of a server advertisement message (SAM) in the server discovery message by the first system; And stopping the transmission of the SSM when the SAM is received by the first system. The method of claim 1, The SSM includes information on the type of message, and the SAM indicates a server's IP address, TCP / UDP port, information required for other services, a flag distinguishing a server from a proxy, a message type, and a valid period of information. In the case of information necessary for only a specific service, including information on the lifetime, the length of the total message, the number of entries indicating the number of server information delivered, the entry type indicating the type of each server, and the length of the entry indicating the length of each server information. Method for providing server / proxy information in a communication network, characterized in that the service is prescribed by each service and stored as an option. The method of claim 1, The performing of the setting may include receiving a new SAM from the client, comparing the information in the corresponding SAM with existing information, and resetting the changed contents. Distributing information about a server or a proxy periodically by using a server discovery message in a second system in which a user process is implemented; And receiving the server or the proxy information from the first system where the client is located, analyzing the server or the proxy information, and transmitting the same to the client to perform necessary settings.