Utilize telecommunications network to realize the interconnected method of local area network (LAN)
The present invention relates to a kind of telecommunications network that utilizes and realize the interconnected method of local area network (LAN), belonging in the digital information transmission is the interconnection technique field of the network of feature with the function of exchange.
At present, normally to adopt public switched telephone network (PSTN) be that the main telecommunications network or the mode of Digital Data Net (DDN) stack router realize to the LAN (Local Area Network) that is distributed in various places.Wherein telephone network and Digital Data Net are as the physical channel of carrying local area network (LAN) interconnect services, and router then plays effects such as protocol conversion and safety guarantee as the equipment of user side.Schematic diagram referring to the LAN (Local Area Network) Ethernet interconnected method of present use shown in Figure 1.The local area network (LAN) M of parent company (being made of server 101 and 102,103 in computer) that wherein is positioned at Beijing or key city realizes interconnected by router one 00 and telecommunications network 1 (being made up of public switched telephone network PSTN and/or Digital Data Net DDN) and router two 00 with the local area network (LAN) N of branch company (being made of server 201 and 202,203 in computer) that is located at the other places.
The interconnected method of present this realization local area network (LAN) has three shortcomings: 1, be the configuring condition that the user must be familiar with the router of each local area network (LAN).2, be increase along with bandwidth, the user needs constantly upgrading router, and is quite bothersome, increases cost again.3, be that the router that is distributed in various places is not easy to centralized management.
The purpose of this invention is to provide a kind of technology of in telecommunications network, utilizing network processing unit to realize router, so that utilize telecommunications network to realize the interconnected method of local area network (LAN).
The present invention utilizes the interconnected method of telecommunications network realization local area network (LAN) to be achieved in that at first and sets up a kind of device that is known as network processing unit at the end of telecommunications network, the technology of router that this network processing unit is integrated, and can finish router feature; Then, local area network (LAN) is received Ethernet interface on separately the network processing unit, for the user of each local area network (LAN) end directly provides lan interfaces; Simultaneously, in telecommunications network, the network processing unit of corresponding other local area network (LAN)s is coupled together by switched circuit, also each network processing unit is disposed the internet address of corresponding port, equipment in the local area network (LAN) is also disposed corresponding internet address, just can realize that local area network (LAN) is interconnected according to the related protocol of the Internet.
Realize the dynamic adjustment of the transmission bandwidth that it is mutual by the number of the switched circuit between each network processing unit in the dynamic adjustment telecommunications network, the switched circuit number is many more, and bandwidth is high more.
The present invention utilizes telecommunications network to realize that the interconnected network processing unit of local area network (LAN) mainly is made up of three parts: central processing unit, the PORT COM of being made up of wide area network interface, local network interface and telecommunications network control port, and memory.
Wherein central processing unit is the control core of whole network processing unit, carries out data processing and all PORT COM of control according to related protocol, makes the entire equipment collaborative work; Wherein the above-mentioned local network interface in the PORT COM mainly is made up of the 10/100M Ethernet chip, and it is connected with the local area network (LAN) of user side, receives the data of local area network (LAN) transmission and sends data to local area network (LAN); Above-mentioned wide area network interface is that to provide speed according to the time-multiplexed standard of telecommunications network to telecommunications network be the wide area network interface of unit with 64Kbps, its end with the switched circuit of telecommunications network is connected, wide area network interface communication by switched circuit and opposite end, the data that reception is sent from other wide area network interfaces, simultaneously the data that also local area network (LAN) or other networks transmitted mail to corresponding wide area network interface; Above-mentioned telecommunications network control port also is to be connected with telecommunications network, be telecommunications network to the webmaster port that this network processing unit is configured, safeguards, monitors, manages, can realize that telecommunications network carries out unified management to all network processing units.
The bandwidth of above-mentioned wide area network interface can realize the adjustment of bandwidth by Port BindingBundling, and the switched circuit number is many more, and bandwidth is high more.
Wherein memory portion is then by the read only memory ROM of start-up routine of depositing self check and guiding main program, and read-write memory RAM three parts that are used for still can preserving the erasable memory storage FLASH of information after save routine and data configuration, the power down and are used for data handling procedure store data information are formed.
Current telecommunications network is only done conversion and transmission on the physical signalling for data service, by the ISO of International Standards Organization procotol 7 layer models, is exactly the processing of only carrying out physical layer.The shortcoming of this mode is to need plug-in upper-layer protocol treatment facility (as router), and cost is higher, and integrated level is low, uses inconvenience.
Characteristics of the present invention are to set up the device of a kind of network processing unit (NPU) at the end of telecommunications network, the technology of router is integrated in this network processing unit goes, utilize this network processing unit to finish original router feature, then, local area network (LAN) is received Ethernet interface on this network processing unit, this network processing unit externally directly provides Ethernet interface for the user of local area network (LAN) end, to by switched circuit the network processing unit of corresponding other local area network (LAN)s being coupled together in the inherent telecommunications network, and to the internet address (IP address) of each network processing unit configuration corresponding port, just can be interconnected according to the related protocol realization local area network (LAN) of the Internet.
In a word, utilize the present invention to realize the interconnected of local area network (LAN), do not need configuration router, also do not need to change the network equipment, and bandwidth can dynamically adjust at any time, really accomplish the effect of plug and play because of bandwidth problem.And the network equipment is realized same webmaster, can accomplish centralized maintenance, uses simple.
Specifically introduce implementation method of the present invention and characteristics below in conjunction with accompanying drawing:
Fig. 1 is the schematic diagram of the present LAN (Local Area Network) interconnected method that uses.
Fig. 2 is that the present invention utilizes telecommunications network to realize the schematic diagram of local area network (LAN) interconnected method.
Fig. 3 is the block diagram that the network processing unit hardware configuration among the present invention is formed.
Fig. 4 is that the present invention utilizes telecommunications network to realize an embodiment schematic diagram of local area network (LAN) interconnected method
Referring to Fig. 2, the present invention utilizes the interconnected method of telecommunications network realization local area network (LAN) to be achieved in that at first and sets up a kind of device (figure is shown with three: 2A, 2B, 2C) that is known as network processing unit 2 at the end of telecommunications network 1, the technology of router that this network processing unit 2 is integrated, and can finish router feature; Then, each local area network (LAN) 3 (figure is shown with three: 3A, 3B, 3C) is received network processing unit 2A, 2B separately, the Ethernet interface on the 2C respectively, the user who holds for each local area network (LAN) 3A, 3B, 3C directly provides lan interfaces; Simultaneously, in telecommunications network 1, network processing unit 2A, 2B, the 2C of corresponding other local area network (LAN)s are coupled together by switched circuit, also each network processing unit 2A, 2B, 2C are disposed the internet address of corresponding port, equipment in the local area network (LAN) is also disposed corresponding internet address, just can realize that local area network (LAN) is interconnected according to Internet protocol.The present invention realizes the dynamic adjustment of the transmission bandwidth that it is mutual by the number of the switched circuit between each network processing unit 2A, 2B, the 2C in the dynamic adjustment telecommunications network 1, and the switched circuit number is many more, and bandwidth is high more.
Referring to Fig. 3, utilize telecommunications network to realize that the interconnected network processing unit 2 of local area network (LAN) will be made up of three parts among the present invention: central processor CPU, the PORT COM of forming by wide area network interface 21, local network interface 22 and telecommunications network control port 23, and memory 25.Wherein 25 of memories are by the read only memory ROMs of the start-up routine of depositing self check and guiding main program, and read-write memory RAM three parts that are used for still can preserving the erasable memory storage FLASH of information after save routine and data configuration, the power down and are used for data handling procedure store data information are formed.
Wherein central processor CPU is the control core of whole network processing unit 2, carries out data processing and all PORT COM of control according to related protocol, makes the entire equipment collaborative work; This central processor CPU is also handled the physical layer protocol of local area network (LAN) and wide area network, makes external chip and circuit reduction.Wherein the above-mentioned local network interface 22 in the PORT COM mainly is made up of the 10/100M Ethernet chip, and it is connected with the local area network (LAN) of user side, receives the data that local area network (LAN) sends, and sends data to local area network (LAN).Above-mentioned wide area network interface 21 is that to provide speed according to the time-multiplexed standard of telecommunications network to telecommunications network 1 be the wide area network interface of unit with 64Kbps, and its end with the switched circuit of telecommunications network 1 is connected.Common wide area network interface 21 is furnished with a plurality of, realizes the adjustment of bandwidth by Port BindingBundling.Wide area network interface 21 is connected together the port of two network processing units 2 by the circuit switching of telecommunications network, so as with wide area network interface 21 communications of opposite end, the switched circuit number is many more, bandwidth is high more.Wide area network interface 21 receives the data of sending from other wide area network interfaces, and the data that also local area network (LAN) or other networks transmitted mail to corresponding wide area network interface simultaneously; Above-mentioned telecommunications network control port 23 also is to be connected with telecommunications network 1, is the webmaster port that 1 pair of this network processing unit 2 of telecommunications network is configured, safeguards, monitors, manages, and can realize that by this 1 pair of all network processing unit of telecommunications network carries out unified management.
The communications protocol that network processing unit 2 among the present invention is supported has: link layer protocol: point-to-point PPP (MP) agreement, IEEE 802.2 agreements, IEEE 802.3 agreements.Network layer protocol: IP, the IPX Internet protocol.Routing Protocol: static routing, routing information protocol RIP II, shortest path priority route protocol OSPF.Fire compartment wall: packet filter firewall.Webmaster: the standard agreement SNMP of monitoring host computer, router and network, graphical centralized maintenance method.
The present invention utilizes telecommunications network to realize that the concrete steps of local area network (LAN) interconnected method are: when two local area network (LAN)s needs are interconnected, at first local area network (LAN) is received on the network processing unit in the telecommunications network, in telecommunications network, corresponding network processing unit is coupled together by switched circuit simultaneously, and to the IP address of network processing unit configuration corresponding port, the equipment in the local area network (LAN) (as computer) also disposes corresponding IP address.Just can carry out communication based on internet standard protocol TCP/IP between above-mentioned two local area network (LAN)s realizes interconnected.Network processing unit is the data message that receives from different ports, and the destination address of filling on topological structure of forming according to network and the message sends toward corresponding ports, finishes the message forwarding capability.As shown in Figure 2, if local area network (LAN) 3A need be sent to local area network (LAN) 3C to data, message at first sends from local area network (LAN) 3A, arrives network processing unit 2A, be forwarded to network processing unit 2C by network processing unit 2A then, be transmitted to local area network (LAN) 3C by network processing unit 2C again; If the link down of network processing unit 2A and network processing unit 2C, network processing unit 2A just is forwarded to network processing unit 2B to message, is transmitted to network interface processing unit 2C by network processing unit 2B; Be transmitted to local area network (LAN) 3C by network processing unit 2C again, play the automatic protective effect of network.Addressing method is wherein then followed the IP routing protocol of standard.
The implementation method of Bandwidth Dynamic adjustment is to utilize telecommunications network dynamically to adjust the number of the switched circuit between the network processing unit, and the switched circuit number is many more, and bandwidth is high more.
Use method of the present invention to realize that user's local area network (LAN) is interconnected, again do not need configuration router, and can change bandwidth at any time, really accomplish the effect of plug and play, and the network equipment can reach the purpose of same webmaster.
The software in the network processing unit of the present invention and the software of router are roughly the same, have mainly increased the control section of telecommunications network, by the port attribute and the state of the direct Control Network processing unit of telecommunications network.Its main function has: IP address, the physical address of configuration local network interface; The IP address of configuration wide area network interface is controlled startup or is closed the wide area network interface; Cooperate communication network to set up semipermanent circuit.Network processing unit just under the control of telecommunications network, is set up interconnecting relation with other network element like this.Network processing unit can according to the rule of IP route, select corresponding port (wide area network interface or local network interface) that message is sent according to the destination address of indicating on the message that receives.
Referring to Fig. 4, this Figure illustrates one and utilize network processing unit 2 (NPU) to realize the interconnected example application of local area network (LAN).1 is telecommunications network among the figure, the 4th, and the server in each local area network (LAN), the 5th, the computer in each local area network (LAN).Be easy to find out, originally all in telecommunications network 1 realize now that in the configuration on the router user only need just can realize the network interconnection according to the local area network (LAN) of corresponding IP address specified configuration oneself.For example: it is the network processing unit 2A (NPU) of 201.1.0.1 that 511 in the computer that is positioned at IP address in branch company's local area network (LAN) on first ground and is 201.1.1.1 needs the h.323-configured gateway address, and the computer 521 that is positioned at IP address in parent company's local area network (LAN) on second ground and is 201.2.1.1 is configured to 201.2.0.1 to the gateway address of network processing unit 2B (NPU), and just can to visit realization mutually interconnected.
The present invention has manufactured experimently some of network processing units, and utilizes telecommunications network to carry out the interconnected performance test of local area network (LAN) according to the method described in the present invention, has reached Expected Results, has realized goal of the invention.