RU2118051C1 - Method for access to world-wide web resources using proxy servers - Google Patents

Abstract

FIELD: electronic communication, in particular, design of high-speed regional networks using Internet and broadcasting channels, such as on-air, cable, satellite broadcasting, multiple-channel multiple-node distribution systems, and so on. SUBSTANCE: during client-server interaction between networks method involves transmission of requests from client to servers using M1 Internet route to proxy servers, which in their turn send requests to servers, receive reply traffic from them and switch Internet route between proxy-servers and clients from M1 route to M2 route for reply traffic by translation of reply traffic to clients through broadcasting network. M2 route is shorter than M1 route, while metric of M1 and M2 routes is defined as number of intermediate nodes passed by request and reply traffic, respectively. EFFECT: decreased access delays, compliance to client-server architecture and World-wide Web standards, such as URL, HTTP, HTML, Proxy, and so on. 3 cl, 1 dwg

Description

 The invention relates to techniques for electrical communications and can be used to build high-speed regional networks based on the Internet and broadcast channels: broadcast, cable, satellite, multi-channel multipoint distribution services (MMDS), etc.

 A known method of addressing and routing Protocol address resolution with a representative (Proxy ARP.) [1, 2], in which a network station responds to requests destined for another network station, posing as the requested station, after which it takes all the necessary decisions on further routing and forwarding packets to the current recipient. As a representative, usually acts as a gateway to a neighboring network. The gateway responds to requests for all stations in the neighboring network, being their representative in the local network, and all traffic to the adjacent network goes through the representative gateway.

 Representative, intermediary (proxy) - a mechanism by which one system appears before another system in response to protocol requests of that one.

 This method allows you to solve the limited interaction problem, namely, interaction through the representative gateway of the nodes of two adjacent adjacent networks, and does not allow the client and the server to be in different subnets or domains separated by other subnets and gateways.

 A known method of high-speed access, implemented on the basis of a broadcast TV data transmission system [3]. In a hybrid (cable, optic cable network) access system they use the transmission and reception of high-speed streams of digital information in the form of packets of different lengths and apply standard TV practice and components. The method consists in the fact that clients send requests to servers via a narrow-band channel (reverse cable TV channel, through dial-up telephone lines through a modem or a digital network with service integration (ISDN), and receive response data streams via a broadband TV channel. In Hybrid access system "(Hybrid Access System - HAS) uses a client / server architecture based on asymmetric networks [4]. The method of client / server interaction involves the collaboration of two application tasks running on different computers on the network, and consists in that clients send requests to the server, but receive the result of its processing.

 This method allows you to effectively solve only a limited problem, namely, providing high-speed access to client nodes localized in a limited territory, because this method requires a cable TV network with a reverse channel or direct telephone connection with a point of presence (PoP-Point of Present) - the head station, this system does not allow to economically solve the problem of building a large distributed network for client nodes located at a considerable distance from the presence point (for example, in another city), and also does not allow inclusion in a broadband network of domains already connected to the Internet through a narrow-band channel without changing the port for connecting to the Internet (Internet service provider), and arising in connection with this the problems of new routing and addressing.

 The method of interaction of the World Wide Web nodes through representative gateways (WWW Proxies.) [5] (prototype) is that clients, based on user commands, form requests to servers, interact with representative gateways on network transport routes in accordance with the family " Internet protocols "and send requests to representative gateways, at the request of customers, representative gateways interact along the Internet routes with servers or other representative gateways and requests are forwarded to servers, servers execute requests and choosing the resources requested by clients, they return response flows along the Network routes to representative gateways, representative gateways return response flows to clients, while representative gateways concentrate, redirect and cache Internet traffic.

 This method allows you to increase the effective network bandwidth only partially due to caching and only for clients located in the same local network as the representative gateway, and does not significantly increase the bandwidth of the distributed network, because traffic of requests transmitted to representative gateways, and a reverse flow to clients is distributed along the same routes.

 The object of the application is based on the task of reducing the access time of distributed and remote users to the resources of the World Wide Web.

 The technical result that can be obtained by implementing this method: reducing the access time to the resources of the World Wide Web for distributed and remote users by 100-1000 times compared with access via telephone lines.

 The essence of the way of accessing the World Wide Web resources through representative gateways is that during client / server gateway communication, clients form and send requests to servers and receive return traffic from servers through representative gateways, while representative gateways concentrate and redirect and cache internetwork communication traffic, when client / server internetwork communication, clients send requests to servers through gateways and subnets of packet Internet communication network along route M1 to pre-gateways representatives, and representative gateways, in turn, redirecting requests to servers and receiving return traffic from servers, switch the gateway route between representative gateways and clients from route M1 to route M2 for return traffic, translating the return traffic to the broadcast network through unidirectional transmitting network interfaces, and clients receive return traffic from the broadcast network through unidirectional receiving network interfaces, and route M2 is less than route M1, where route metric route M1 - the number of intermediate nodes on the route of the requests from the client to the representative-gateway routing metric M2 route - the number of intermediate nodes on the route of the return traffic from the gateway to the customer-representative.

 Clients send requests to representative gateways of the private network, and private network gateways, in turn, send requests on the M1 route to representative gateways and receive reverse traffic from the broadcast network on the M2 route from representative gateways and forward it to clients.

 The return traffic from the servers to the clients goes to the representative gateway routers, the representative gateway routers route the reverse traffic to the proxy servers, the proxy servers redirect and forward the reverse traffic to the routers for transmission to the broadcast network.

 Appointment of essential features.

 1. The way to access the resources of the World Wide Web through representative gateways.

 This feature is generic and determines the purpose of the claimed object as a whole, and states that this access method is a holistic operation of changing states in the World Wide Web technical system, of which clients are part (clients are means of access to Network resources, universal computer network user interfaces funds), representative gateways (proxy-gateways) and server. And also this symptom states the compliance of the method with the standards of the World Wide Web (World-Wide Web: URL, HTTP, HTML, PROXY, etc.) and the Internet. The purpose of the access operation is to read, write or modify data - indexed resources of the World Wide Web (URI-Universal Resource Identifier, URL-Universal Resource Locator) [6].

 2. During client / server interworking, clients generate and send requests to servers and receive return traffic from servers through representative gateways, while representative gateways concentrate, redirect and cache gateway traffic.

 This symptom states that this system uses a kind of model for the interaction of computing network tools client / server: client - agent - server. Representative gateways are agents acting simultaneously as a client and server, and all traffic going to the Internet and going to the Internet is concentrated on it, because all clients send requests to servers and receive return traffic from them through representative gateways.

 New significant features.

 1. Clients send requests from servers through the Internet gateways and subnets of the packet communication Internet network along the M1 route to the representative gateways, and the representative gateways, in turn, redirecting requests to the servers and receiving reverse traffic from the servers, switch the gateway route between the gateways - Representatives and customers from route M1 to route M2 for return traffic.

 The introduction of an additional new system operation: switching (switching) of internetwork communication routes, allows flexible redirection of data flows on the Web. The introduction of an additional M2 route for reverse traffic with higher bandwidth allows reducing the time of access to resources for distributed and remote users.

 2. By transmitting return traffic to the broadcast network through unidirectional transmitting network interfaces, clients receive return traffic from the broadcast network through unidirectional receiving network interfaces.

 3. Route M2 is less than route M1, where the route metric of route M1 is the number of intermediate nodes on the route for following requests from the client to the representative gateway, route metric of route M2 is the number of intermediate nodes on the route for responding traffic from the representative gateway to the client.

 The introduction of this condition makes it possible to adequately evaluate the parameters of interaction between the nodes of the Network, and flexibly and purposefully manage them.

 4. Clients send requests to private network gateways, while private network gateways, in turn, send requests on the M1 route to representative gateways and receive return traffic from the broadcast gateways on the M2 route from representative gateways and forward it to clients .

 This symptom states that clients and private network gateways operate in a broadband network of an enterprise or city (LAN, MAN), private network gateways send requests to a central representative gateway along the M1 route via a narrowband communication line, and receive return traffic via M2 route through a broadband broadcast network.

 5. The return traffic from the servers to the clients goes to the representative gateway routers, the representative gateway routers direct the return traffic to the proxy servers, the proxy servers redirect and forward the reverse traffic to the routers for transmission to the broadcast network.

 This flag reports the sequence of actions with the representative gateway: Internet __ → router __ → proxy server __ → router __ → converter-modulator __ → broadcast network.

 The combination of the above features can reduce the access time of distributed and remote users to the resources of the World Wide Web. The technical result, which can be obtained by implementing the method, reducing the access time to the resources of the Network in 100 - 1000 times compared with access to resources over telephone lines.

 An example implementation of the method is illustrated in the specific diagram presented in the drawing, where 1 is the client; 2 - a network interface consisting of a telephone modem and a receiving DVB modem (Digital Video Brodcasting, cable modem); 3 - gateway - router; 4 - subnet or network domain (LAN, MAN); 5 - data transmission network, Internet; 6 - core network; 7 - representative gateway; 8 - proxy server; 9 - server; 10 - transmitting broadcast interface; 11 is a broadcast channel.

 The network operates as follows: Clients 1 (PC, MS Windows 95, Netscape Navigator Web Client) located on subnets 4 send URL requests to servers 9 (Netscape Communication Web server) through gateways 3 (Cisco Router) and subnets of a data network or Internet 5 along route M1 to a representative gateway 7 (3 - Cisco Router, 8 - Netscape Proxy server, 10 - Hybrid CyberMaster), which transmit requests through the core network 6 to server 9, representative gateways 7 switch response flows data on route M2 to broadcast channel 11 to clients 1 through a unidirectional transmitting interface 10, and clients 1 receive response streams from broadcast channel 11 through unidirectional receiving interfaces - cable modems 2 (Hybrid Remote link adapter).

Literature
1. S. Carl-Mitchell, JS Quarterman. Using ARP to Implement Transparent Subnet Gateways. 1987, RFC 1027.

 2. R. Braden, J. Postel. Reguirements for Internet Gateway. 1987, RFC 1009.

 3. US, patent N 5347304, Sept. 13, 1994, Moura, et. al. 348/12 (H 04 H 1/00).

4. <URL: http: // www. hybrid. com>
5. Ari Luotonen, Kevin Altis, Worid-Wide Web Proxies. CERN, Geneva (Switzerland), May 25-27, 1994, First Internation conference on the WWW (prototype).

<URL: http: //www.W3. org / hypertext / www / proxies />
6. URIs of WWW. T. Berness-Lee, CERN, June 1994, RFC 1630.

Claims (3)

 1. A way of accessing the World Wide Web resources through representative gateways, which means that during client / server gateway communication, clients form and send requests to servers and receive return traffic from servers through representative gateways, while representative gateways concentrate , redirect and cache Internet communication traffic, characterized in that during client / server Internet communication, clients send requests to servers through the Internet gateways and subnets of the packet communication network Internet via ma to the M1 circuit to representative gateways, and the representative gateways, forwarding the requests to the servers and receiving the return traffic from the servers, switch the gateway route between the representative gateways and clients from the M1 route to the M2 route for the reverse traffic, broadcasting the reverse traffic to the broadcast network through unidirectional transmitting network interfaces, and clients receive return traffic from the broadcast network through unidirectional receiving network interfaces, and route M2 is less than route M1, where the route metric arshruta M1 - the number of intermediate nodes on the route of the requests from the client to the representative-gateway routing metric M2 route - the number of intermediate nodes on the route of the return traffic from the gateway to the customer-representative.  2. The method according to claim 1, characterized in that the clients send requests to the gateway representatives of the private network, and the gateway representatives of the private network, sending requests along the M1 route to the gateway representatives, and receiving from the gateway representatives the return traffic from the broadcast network via route M2, send it to customers.  3. The method according to claim 1 or 2, characterized in that the return traffic from the servers to the clients arrives at the routers of the representative gateways, the routers of the representative gateways direct the reverse traffic to the proxy servers, the proxy servers redirect and direct the reverse traffic routers for transmission to a broadcast network.