CN1138353C

CN1138353C - A kind of unbalanced transmission network communication method

Info

Publication number: CN1138353C
Application number: CNB001034332A
Authority: CN
Inventors: 王海鹰
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-03-10
Filing date: 2000-03-10
Publication date: 2004-02-11
Anticipated expiration: 2020-03-10
Also published as: CN1313678A

Abstract

The invention relates to a communication method of an unbalanced transmission network, which is characterized in that a unidirectional physical or logical channel is designated between a main station and a user side as a virtual local area network, another physical or logical channel is designated between the main station and the user side as an external interactive network, the main station sends a standard local area network physical frame on the virtual local area network according to a user side physical address, and the user side transmits user side data to the main station through the external interactive network. The invention organically combines the unidirectional mode and the bidirectional mode in the traditional communication system, so that the existing unidirectional network has the function of bidirectional communication.

Description

A kind of communication method for unbalanced transmission network

The present invention relates to a kind of communication method for unbalanced transmission network, belong to network communication field.

In traditional communication system, people's traffic model is symmetrical, and the round-trip transmission of information all is to realize on a physical medium.For example, when people made a phone call, the speech of transmission and the speech of reception were all defeated a phone line; And in the two-way satellite system, the transmission of data and reception also all are that channel is realized via satellite.In order to reduce the cost of system, a lot of new communication modes have occurred, as unidirectional satellite communication system and unidirectional cable television system.But pure one-way communication user can only receive information passively, and it can't solve the demand of interactive information between the user.For example, user A wants that the data of consulting user B library just can't realize.The communication mode of employing local area network (LAN) can satisfy the demand of exchange message between the user on the network, and local area network (LAN) is a network that adopts broadcasting and medium to share, and its substantive characteristics is that the LAN data bag that the user sends can be received by the Any user on the network.But this reception has certain condition, and the physical address of receiving equipment must consistently with the destination address of packet just can receive, and the local area network communication transmission range is shorter.For some specific systems, for example support the simplex system of broadcasting in addition, as unidirectional satellite system or one-way CATV system, the user not can send data, therefore can not constitute local area network (LAN).Have, do not support the system that broadcasts for some, for example dialing online though support two-way communication, is not supported Radio Broadcasting Agreements, can't realize local area network (LAN) yet.

For addressing the above problem, the objective of the invention is the local area network (LAN) of being unrealized or simplex system in a kind of easy two-way communication is provided, it is communication method for unbalanced transmission network, it makes between main website and the user side constructs local area network (LAN) on the medium that can't directly realize local area network (LAN), thereby the simplification network configuration is supported institute's protocols having of local area network (LAN).

For realizing the object of the invention, the present invention proposes a kind of communication method for unbalanced transmission network, propagation data between main website and user side, its method is as follows:

Uni-directional physical of setting or logical channel are a VLAN between main website and user side;

Between main website and user side, set two-way physics or logical channel in addition and be outer alternately network;

When outside mutual network when being a local area network (LAN), user side is by the local area network (LAN) physical frame and the physical address broadcast frame of outer mutual Network Transmission standard; And main website sends the local area network (LAN) physical frame of standard on the net according to the user side physical address at virtual local area;

When outside mutual network when being wide area network or internet, if user side is a unit, certain machine (being generally the machine of making a start) that the form that user side breaks into the IP bag by outer mutual network with the IP address and the physical address of our station sends appointment on the main website local area network (LAN) to forms the IP physical address table of comparisons; If user side is when being a local area network (LAN), certain machine (being generally the machine of making a start) that the form that a user side microcomputer breaks into the IP bag with the physical address and the IP address of all microcomputers in the whole local area network sends appointment on the main website local area network (LAN) to forms the IP physical address table of comparisons; Or each microcomputer sends its IP address and physical address on the main website local area network (LAN) certain designated computer formation IP physical address table of comparisons with the IP packet form alone.

Adopt the inventive method, the data communication step is as follows between main website and the user side:

Main website sends the local area network (LAN) physical frame according to user side physical address (as: MAC Address, ID number etc. the peculiar address of receiving equipment) to user side on the net at virtual local area; User side receives the local area network (LAN) physical frame;

When the outer mutual network of setting between main website and the user side was local area network (LAN), install software emulation and conversion program on ustomer premises access equipment were sent to main website side with the form of local area network (LAN) physical frame by outer mutual network with feedback data; And install software emulation and conversion program on main website equipment in order to receiving the passback data of this outer mutual network, and are handled the data that send to the user side.

When the outer mutual network of setting between main website and the user side is wide area network or internet, install software emulation and conversion program on ustomer premises access equipment, the form that feedback data is broken into the IP bag is sent to main website side by outer mutual network; And install software emulation and conversion program on main website equipment wrap in order to the passback IP that receives this outer mutual network, and handle the data that send to the user side.

Principle of the present invention is utilized outer mutual technology exactly, and the transmitting-receiving of data is divided on two channels, utilizes a uni-directional physical or the descending reception of logic channel, and other sets two-way physics or the up transmission of logic channel; In a system that does not support local area network (LAN) install software emulation and conversion program, and transmit local area network (LAN) physical frame or IP bag by outer mutual network channel, constructing a virtual local area network (LAN), thus the non-equilibrium transmission of realization data.

Now in conjunction with the accompanying drawings the present invention is described further:

Accompanying drawing 1 is the inventive method principle schematic;

Accompanying drawing 2 sends the data flow schematic diagram for main website;

Accompanying drawing 3 sends the data flow schematic diagram for user side;

Accompanying drawing 4 is used the schematic diagram that non-equilibrium transmission method carries out network service for satellite communication system.

Accompanying drawing 5 is unidirectional satellite communication system unbalanced transmission network data flow schematic diagram.

When accompanying drawing 6 is a local area network (LAN) for user side, the inventive method principle schematic.

As shown in Figure 1, communication method for unbalanced transmission network is realized by the following step:

Uni-directional physical of setting or logical channel are a VLAN (4) between main website (1) and user side (2);

Network (3) alternately outside between main website (1) and user side (2), setting another two-way physics or logical channel and be;

User side is by local area network (LAN) physical frame and the physical address broadcast frame or the IP bag of outer mutual network (3) transmission standard.

The local area network (LAN) physical frame of the standard that sends according to the user side physical address is gone up by main website (1) at VLAN (4);

Above-mentioned VLAN (4) can be the channel in unidirectional satellite communication system, the one-way CATV system etc.Above-mentioned outer mutual network (3) can be a local area network (LAN), also can be that two-way external network such as a wide area network or the internet of a standard constitutes.Outer mutual network (3) main website (1) and user side (2) correspondence be equipped with outer net transmitter (8) alternately and outside net receiver (7) alternately.Outer mutual net transmitter and outer mutual net receiver can be network interface cards, also can be the modulator-demodulator network equipments such as (MODEM).

As Fig. 2, shown in Figure 3, be main website (1) and user side (2) transmission data and receiving data stream journey schematic diagram.It is so substantially that main website (1) sends data flow: the data from other network channel and outer mutual network enter main website software emulation and conversion program, check the data that whether comprise local area network (LAN) physical frame or IP bag earlier, physical frame data in this way, deliver to application program, application program send data are delivered to " judging that this physical frame should send? "As not being, check further whether the IP bag that receives is legal, as illegal, abandon this packet, as legal, then deliver to application program, the data that application program sends enter into " software emulation module ", " be converted to the physical frame data ", " judging that this physical frame can send? ", can send, then main website (1) is gone up according to user side physical address (as: MAC Address at VLAN (4), wait the peculiar address of receiving equipment ID number) send the local area network (LAN) physical frame to user side, deliver to that " one-way communication equipment " go up to send, as not, then abandons this physical frame data.It is so substantially that user side sends data flow: user side sends reply data and other data, go up install software emulation and conversion program at user side (2), " judge that outer mutual net is local area network (LAN) or wide area network ", local area network (LAN) in this way, then main website side is delivered to by " outer mutual network " in " by the packing of local area network (LAN) physical frame formats " back, main website side is then delivered to by " outer mutual network " after " by the packing of IP packet format " in wide area network or internet in this way.

As shown in Figure 4, use the schematic diagram that non-equilibrium transmission method carries out network service for unidirectional satellite communication system.

Shown in Figure 5, use unbalanced transmission network data flow schematic diagram for this unidirectional satellite communication system, its data transmission step is as follows:

Main website (1) goes up to user side at VLAN (4) according to local area network standard and sends the local area network (LAN) physical frame.Being about to application's data is to deliver on the one-way data transmitting apparatus (9) behind the IP bag by TCP/UDP module and IP module converts, and one-way data transmitting apparatus (9) is the local area network (LAN) physical frame with the IP packing data after send and mouthful send on the uni-directional physical channel (4) of VLAN;

User side (2) receives this local area network (LAN) physical frame data;

Go up install software emulation and conversion program (6) at user side (2), when user side sends data, the user side application program is corresponding, and will to send packing data by TCP/UDP module and IP module be to deliver on this user side software emulation and the conversion program (6) behind the IP bag, judge that outer mutual net is local area network (LAN) or wide area network, local area network (LAN) in this way, installed software emulation and conversion program with data conversion be the local area network (LAN) physical frame, and the data head that adds TCP/IP again by outward alternately network (3) send on the outer mutual net receiver of main website; Wide area network or internet directly send to the IP bag on the outer mutual net (3) by the TCP/IP form in this way, and are sent on the outer mutual net receiver.

At main website install software emulation and conversion program (5), in order to receive above-mentioned local area network (LAN) physical frame or IP bag; When main website received data, the diplomacy of main website (1) receiver mutually confirmed that these data are after local area network (LAN) physical frame or IP wrap, it to be transferred to software emulation and conversion program (5), arrive primary application program through its IP layer/TCP layer.

The transmission of VLAN physical frame realizes by VLAN (4), and it is to receive by outer mutual network (3) to realize.

When accompanying drawing 6 is a local area network (LAN) for user side, the inventive method principle schematic.When if user side is a local area network (LAN), certain machine (being generally the machine of making a start) that the form that a user side microcomputer breaks into the IP bag with the physical address of all microcomputers in the whole local area network and IP address sends appointment on the main website local area network (LAN) to forms the IP physical address table of comparisons, or each microcomputer sends its IP address and physical address to alone, and certain designated computer forms the IP physical address table of comparisons on the main website local area network (LAN) with the IP packet form.

The present invention has broken through the various restrictions of conventional local area to the practical communication medium, thereby has broken one way system and the isolated mutually general layout of bidirectional mode in the legacy communications system, and both are organically combined, and realizes resource-sharing; The present invention has transformed existing unilateral network, make it to become complete outer mutual network, solve the intercommunication network problem of various non-outer mutual systems easily, can be applicable on unidirectional satellite communication network and the one-way CATV network network, also can be applicable on the bidirectional communication network; The present invention supports multiple LAN protocol comprehensively pellucidly, supports the application software of various local area network (LAN)s.

Claims

1, a kind of unbalanced transmission network communication method, is to send data by main station (1), user end (2) receives data, it is characterized in that:

a. A one-way physical or logical channel is set as a virtual local area network (4) between the master station (1) and the user end (2);

b. Setting another bidirectional physical or logical channel as an external interactive network (3) between the master station (1) and the user end (2).

2. A kind of unbalanced transmission network communication method according to claim 1, when the external interaction network is a local area network, it is characterized in that:

a. The client transmits standard local area network physical frames and physical address broadcast frames through the external interaction network (3);

b. The master station (1) sends a standard LAN physical frame on the virtual local area network (4) according to the physical address of the client.

3. A kind of unbalanced transmission network communication method according to claim 1, when the external interactive network is a wide area network or the Internet, it is characterized in that: if the user end is a stand-alone, the user end transfers this The IP address and physical address of the station are packed into an IP packet and sent to a designated machine (usually the originating machine) on the LAN of the master station to form an IP physical address comparison table.

4. A communication method for an unbalanced transmission network according to claim 1 or 3, characterized in that: if the user end is a local area network, a certain microcomputer at the user end prints the physical addresses and IP addresses of all microcomputers in the entire local area network In the form of an IP packet, it is sent to a designated machine (usually the originating machine) on the LAN of the master station to form an IP physical address comparison table.

5. An unbalanced transmission network communication method according to claim 1 or 3, characterized in that: each microcomputer transmits its IP address and physical address to a designated computer on the main station LAN in the form of IP packets to form IP physical address comparison table.

6. The unbalanced transmission network communication method according to claim 1, characterized in that the data communication steps between the master station (1) and the user end (2) are as follows:

a. The master station (1) sends a local area network physical frame to the user terminal according to the physical address of the client (such as: MAC address, ID number and other unique addresses of receiving equipment) on the virtual local area network (4);

b. The client (2) receives the LAN physical frame.

7. The unbalanced transmission network communication method according to claims 1 and 3, when the external interaction network is a local area network, it is characterized in that:

a. Install software emulation and conversion program on the user end (2), and send the feedback data to the main station side through the external interactive network (3) in the form of local area network physical frames;

b. Install a software emulation and conversion program at the master station to receive the return data from the external interactive network. And process the data sent to the user side.

8. According to the unbalanced transmission network communication method described in claims 1 and 3, when the external interactive network is a wide area network or the Internet, it is characterized in that the data communication steps between the master station (1) and the user end (2) are as follows:

a. install the software emulation and conversion program on the user end (2), and send the feedback data to the main station through the external interactive network (3) in the form of IP packets;

b. Install a software emulation and conversion program on the master station to receive the return IP packet from the external interactive network and process the data sent to the user side.

9. The unbalanced transmission network communication method according to claim 1, characterized in that the external interaction network (3) can be composed of a local area network.

10. The unbalanced transmission network communication method according to claim 1, characterized in that the external interaction network (3) can also be composed of a wide area network or the Internet.