KR100379376B1 - Wireless Matching Method in Packet Router - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packet transmission method for implementing efficient use of a circuit in an intranet. In particular, the present invention relates to a circuit using a wireless matching function when connecting to an external network in local area (LAN) and long distance communication (WAN). The present invention relates to a wireless matching method of a packet router for increasing the efficiency of the packet router. According to the present invention, in the mobile communication data service method using a wireless matching function, establishing a wireless data link through the mobile communication network between the intranet and the external Internet network, and the corresponding packet through the established wireless data link Transmitting a packet, determining whether another packet is transmitted after the packet transmission is completed, and releasing the established wireless data link for a predetermined time, thereby making the external access line of the intranet wireless. There is an effect that can implement a network configuration that can be easily added and deleted.

Description

Wireless Matching Method in Packet Router

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data communication service, and more particularly, to a wireless matching method of a packet router suitable for efficiently managing a connection from a LAN or a WAN to an external network.

Typically, leased lines by line leasers or Internet service providers when connecting intranets such as local area networks (LANs) or wide area networks (WANs) with external networks or configuring intranets between remote locations. A leased line service was provided for leasing.

This leased line service is a system that allows subscribers to use the internet and PC communication for 24 hours unlimitedly using the existing modem without additional equipment. use.

First, dial in the phone number of the service provider running Windows Dial-Up Networking and providing Internet services. In addition, when using an in-house LAN, a simple networking setting is performed without entering a separate telephone number, and then the web browser (Web Browser) that can use the Internet is connected to the Internet.

The leased line service utilizes Frame Relay Technology and Asynchronous Switching Mode (ATM) switching and provides 24-hour Internet service to large organizations or groups. The leased line service provides unique features that were not possible with existing router-centric Internet services.

In other words, it maintains the use of a certain amount of backbone for high-speed data transfer at a speed of 100 megabits / sec for each port even during heavy congestion. Therefore, one large file transfer does not run out of bandwidth.

In addition, the load concentrated in the router is separated by the asynchronous transmission-frame relay switching (ATM-FR Switch), and at the same time, the circuit usage is maximized through the implementation of a virtual discrete data network (VPDN). This dedicated line service supports multicast suitable for voice / video communication.

In addition, leased line services support multiple virtual networks as well as multiple protocols in the same infrastructure and control the bandwidth required for a specific application or server.

The leased line service described so far minimizes network congestion and performs high-speed data transmission effectively, so applications requiring large capacity and fast response (e-mail and multimedia message exchange, image / graphic transmission / reception in-house network, client / server database access) ), And for intranets that always have similar usage rates.

However, intranets with different usage rates for different time zones are congested at certain times, resulting in a bottleneck resulting in slower transmission speeds. In addition, there is a problem in that the efficiency of the line is lowered by bringing unnecessary waste of the line in a time when there is almost no line usage.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and establishes a wireless data link only when a user data packet requires transmission and reception between an intranet and an external internet network, thereby allowing an intranet user to connect to an external network. The present invention provides a method of wireless matching of a packet router so that it is suitable to efficiently use a leased leased line, which is essentially used for an external line connection.

According to an aspect of the present invention for achieving the above object, in the mobile communication data service method using a wireless matching function, establishing a wireless data link between the intranet and the external Internet network through the mobile communication network, the establishment Transmitting the corresponding packet through the established wireless data link, determining whether another packet is transmitted after the packet transmission is completed, and releasing the opened wireless data link for a predetermined time period. do.

Preferably, the wireless data link is set or released in accordance with the amount of packets generated between the intranet and the external Internet network.

1 is a network diagram of a wireless Internet matching link.

Figure 2 is a block diagram showing the structure of a wireless packet router according to the present invention.

3 is a diagram illustrating a process of establishing a wireless data link for transmitting a packet generated from an intranet to an external internet network by a router when a wireless data link is not established according to the present invention.

4 is a diagram illustrating a wireless data link setting procedure for transmitting a packet generated from an external internet network to an intranet by a network interworking device when a wireless data link is not established in the packet transmission method according to the present invention.

FIG. 5 is a diagram illustrating a process of additionally establishing a wireless data link and transmitting a packet when a packet generated in an intranet exceeds a transmission capacity of a currently established wireless data link in the packet transmission method according to the present invention.

6 is a diagram illustrating a process of additionally establishing a wireless data link and transmitting a packet when a packet generated from the external Internet exceeds a transmission capacity of a currently established wireless data link in the packet transmission method according to the present invention.

7 is a view illustrating a process of releasing a wireless data link by an intranet router in a packet transmission method according to the present invention.

Explanation of symbols on the main parts of the drawings

10: intranet host 20: router

30: mobile switching center 40: network interworking device

50: internet host

Currently, private LANs or WANs are composed of different kinds of intranets to meet the needs of various users such as enterprises, research institutes, schools, and government offices.

Such intranets are made up of data communication networks based on TCP / IP in large part due to the explosive demand for the Internet.

The reason for this is based on TCP / IP because the transmission speed is about 3 times faster than the existing network.

Therefore, one of the most important entities in this network configuration is the packet router. A packet router is required to access an external network such as the Internet along with a packet routing function between each data terminal HOST or routers within an intranet.

This external network connection inevitably requires a leased line.

At this time, the efficient use of leased leased lines is the most important task in intranet design.

In other words, providing an external network access link only when a user in the intranet accesses the external network can obtain the most efficient circuit utilization efficiency.

In order to satisfy these requirements, in the present invention, when a wireless data service link is used to access an external network, the packet router may establish a wireless matching link only when necessary so that intranet users can access the external network.

Hereinafter, with reference to the accompanying drawings, the configuration and operation according to an embodiment of the present invention will be described.

2 is a block diagram showing the structure of a wireless packet router according to the present invention.

Referring to FIG. 2, the wireless packet router includes a wired matching module, a wireless matching module, and a packet routing module.

The wired matching module may be used for internal intranet matching or external network matching, and the wireless matching module is used to connect with a network interworking device of a wireless data service network.

In addition, each matching module is composed of layer 1 and layer 2. The layer protocol of the wire matching module follows the matching method of each module, and the layer 1 and layer 2 of the radio matching module follow the layer protocol of each wireless data service network.

For example, when using a CDMA wireless data service network, layer 1 and layer 2 may be based on IS-707.

The network address (for example, IP address) of each wireless matching module is set by the operator and recognized by the network interworking device so that the packet router can match the external network such as the Internet through the network interworking device.

At this time, such a wireless matching module is composed of a plurality of matching modules, each may have the same network address, or may have a different network address.

When the intranet is configured using such a router, a network diagram of a wireless Internet matching link as shown in FIG. 1 can be obtained.

Accordingly, according to the present invention, the packet router basically uses a wireless data service of a mobile communication data service network to enable an intranet user to access an external network such as the Internet.

Such a packet router releases all radio links if packets transmitted to the external network do not occur for a predetermined time or more.

In addition, when user data connected to an external network is congested, a new wireless data link must be established using a network interworking device or a packet router to transmit user packets.

In addition, the packet router and the network interworking device must open a new wireless link if they do not have a wireless link to transmit the user packet.

3 is a diagram illustrating a wireless data link setting process for transmitting a packet generated from an intranet to an external internet network by a router when a wireless data link is not established according to the present invention.

Referring to FIG. 3, the router 20 instructs to temporarily stop packet transmission to the originating intranet host 10 after buffering the packet received from the intranet (S10).

Then, a wireless data call is made to the mobile communication network to establish a wireless link (S11).

The mobile switching center 30 then establishes a virtual circuit for the call with the network interworking device 40.

After establishing the circuit, the router 20 and the network interworking device 40 establish a data link layer for the corresponding wireless link (S12).

When the wireless data link is established in this way, the router 20 transmits the stored packet, and sends a packet transmission resume command to the originating intranet host 10 (S14).

After this configuration, the host on the intranet can transmit and receive packets with the host on the external network (S15).

4 is a diagram illustrating a wireless data link setting process for transmitting a packet generated from an external internet network to an intranet by a network interworking device when a wireless data link is not established in the packet transmission method according to the present invention.

Referring to FIG. 4, the network interworking device 40 requests the mobile switching center 30 to establish a virtual circuit in order to find a corresponding router with a network address (for example, an IP address) of a received packet and establish a wireless data link. (S20).

At this time, the network interworking device 40 buffers the received packet and causes the originating Internet host 50 to temporarily stop packet transmission (S21).

In addition, the mobile switching center 30 that receives the virtual line establishment request from the network interworking device 40 calls the router 20 to establish a wireless call channel (S22).

The router 20 and the network interworking device 40 set a data link layer (S23).

Accordingly, when the wireless data link is established, the network interworking device 40 transmits the stored packet to the intranet host 10 and issues a new packet transmission resumption command to the originating Internet host 50 (S24).

Therefore, the Internet host 50 after this can transmit and receive a packet with the intranet host 10. FIG.

FIG. 5 is a diagram illustrating a process of additionally establishing a wireless data link and transmitting a packet when a packet generated in an intranet exceeds a transmission capacity of a currently established wireless data link in the packet transmission method according to the present invention.

The transmission process shown in FIG. 5 is performed in the same manner as the transmission process of FIG. 3, and when additionally establishing a wireless link by transmitting a wireless data call to the mobile communication network, an additional wireless data link setting process is performed for a packet received exceeding the transmission capacity. This is included (S30).

FIG. 6 is a diagram illustrating a process of additionally establishing a wireless data link and transmitting a packet when a packet generated from the external Internet exceeds a transmission capacity of a currently established wireless data link in the packet transmission method according to the present invention.

The transmission process shown in FIG. 6 is performed in the same manner as the transmission process of FIG. 4,

The mobile switching center 30, which has received a request for establishing a virtual circuit for a packet received exceeding the transmission capacity from the network interworking device 40, calls the router 20 to establish an additional wireless link. It becomes (S40).

Here, the network address (IP address) of the wireless data link set in FIGS. 3, 4, 5, and 6 is set by the intranet operator. At this time, the network interworking device 40 can recognize the network address thus set. Should be

Accordingly, the router 20 and the network interworking device 40 are network control protocols (Pointo-to-Point Protocol, PPP) layer protocols according to the network layer protocol (Netowork Control Protocol, NCP) In this way, it recognizes the mutual network address of each data link.

7 is a diagram illustrating a process of releasing a wireless data link by an intranet router in a packet transmission method according to the present invention.

Referring to FIG. 7, the router 20 checks whether a packet transmitted and received on a corresponding wireless data link occurs (S50).

At this time, if no packet transmitted or received on the corresponding wireless data link is found for a predetermined time (S51), the connection of the data link layer between the router 20 and the network interworking device is released (S52).

In addition, the router 20 releases the radio call channel, and the mobile switching center 30 and the network interworking device 40 release the corresponding virtual line (S53).

To release a radio data link that is not used here, it must be possible to quickly discover these radio channels.

Therefore, the router 20 and the network interworking device 40 assign serial numbers to wireless data links connected to each other, and assign a small number to the link established first. When a packet to be transmitted is generated, transmission should be attempted using a link having a small link number.

At this time, if the average generated traffic (call channel) of the link exceeds the capacity of the link, a recently allocated data link can be quickly released by using a method of transmitting using the next link.

According to the present invention as described above, by using a wireless data link variably in connecting the intranet to the external Internet, an external network access link can be efficiently used, and a separate dedicated line needs to be installed between the intranet and the line rental communication service provider. There is no.

That is, by making the external access line of the intranet wireless, there is an effect that a network configuration can be easily implemented.

Claims (7)

In the mobile communication data service method using a wireless matching function, Establishing a wireless data link through a mobile communication network between an intranet and an external internet network; Transmitting the packet through the established wireless data link; Determining whether another packet is transmitted after the packet transmission is completed; And releasing the established wireless data link for a predetermined time. The wireless data link of claim 1, wherein when establishing a wireless data link between the intranet and the external internet network, a packet transmission from a host of the intranet to the external internet network is required. And a virtual line is set in the mobile communication network after that. The method of claim 1, wherein when establishing a wireless data link between the intranet and the external internet network, a packet transmission from a host of the external internet network to the intranet is required, thereby establishing a connection between the mobile communication network and the external internet network. And a packet transmission from a host of the external internet network to a host of the intranet through a wireless data link. The method of claim 1, wherein the wireless data link is set or released in a variable manner according to the amount of packets occurring between the intranet and the external Internet network. The method of claim 1, wherein the disconnecting step comprises disconnecting a wireless data link between the intranet or the external internet network and the mobile communication network when the packet transmission is not required for a predetermined time between the intranet and the external internet network. And then releasing a communication channel of the intranet or the external internet network, and then releasing a virtual circuit of the mobile communication network. The method of claim 1, wherein the transmitting of the packet through the wireless data link comprises selecting the wireless data link according to a priority order when transmitting a packet and transmitting the corresponding packet. 7. The method of claim 6, wherein the wireless router has a low-priority wireless data link detected early and released in advance.