JP2000358036A - Mesh-type radio access system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To utilize the flexible constructing system of the Internet utilizing microwave radio transmission by connecting radio access nodes by the mesh-type topology constitution of a point-to-point base utilizing microwave radio. SOLUTION: A radio access node 15 is provided with a router 12 for transmitting Internet protocol(IP) data and with the same pieces of radio equipment 11 as the number of all the routers adjacent to it. Then, a data signal 14 inputted from the router 12 is converted to a microwave radio signal 13 to output toward the adjacent routers. Since the mesh-type topology communication of a point-to-point base utilizing the microwave is constituted like this, an alternate route can be established without having effect on another traffic even when a fault is caused between some nodes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to the Internet.

[0002]

2. Description of the Related Art FIG. 4 is a schematic diagram showing the configuration of a conventional Internet. In FIG. 4, each Internet node 21 and Internet connection service provider 22
The interconnection and the bidirectional transmission form a communication network using a wired cable 23 such as a copper wire or an optical fiber.

[0003]

As described above, in the conventional Internet, since nodes are connected by a wired cable, it is difficult to flexibly cope with a change or reconfiguration of a network in a short period of time. There is a problem.

[0004] When a wired system is constructed, enormous facility costs are required for laying the wired cable, and there is a problem in terms of economy.

An object of the present invention is to provide a flexible Internet construction system using microwave radio transmission in view of the above problems.

[0006]

SUMMARY OF THE INVENTION The feature of the present invention is that a mesh type wireless access system is used for the Internet, so that between nodes (routers, etc.) conventionally connected by a wired cable and between Internet connection service providers. The wireless communication system is applied to the communication of the communication system.

The conventional wireless transmission system uses a point-to-multipoint system having a star topology to construct the system. However, the mesh-type wireless access system of the present invention employs a Paying attention only to this, it is a point-to-point system, but the feature is that a mesh type topology is constructed for the entire node.

[0008] More specifically, the mesh type wireless access system of the present invention bidirectionally transmits data signals by connecting each Internet node or Internet connection service provider using microwave radio transmission.

As described above, according to the present invention, since data signals between each Internet node and between Internet service providers are transmitted by microwave radio,
The network can be changed and rebuilt in response to the increase or decrease in communication traffic more flexibly and in a shorter time than a conventional wired network using copper or optical fiber cables, and there is no need to lay a wired cable. Therefore, there is an advantage that the equipment cost can be significantly reduced. In addition, there is a sense of security that the user is free from a physical failure between the nodes.

[0010]

FIG. 1 is a schematic diagram showing an embodiment of a mesh-type radio access system according to the present invention. In FIG. 1, a connection is established between each Internet node 1 and each Internet connection service provider 2 by a microwave radio 3, and a data signal is transmitted bidirectionally by radio.

FIG. 2 shows an embodiment of a radio access node applied to the present invention. In FIG. 2, a wireless access node 15 includes a router 12 for transmitting IP (Internet Protocol) data, and a
It has the same number of radios 11 as the number of all adjacent routers (the number of adjacent routers is 2 in FIG. 2), and converts a data signal 14 input from the router 12 into a microwave radio signal 13. Output to the neighboring router. Under the router 12, PCs, servers, LANs, and the like, which are sources or destinations of IP data, are connected, and Internet applications and the like are executed.

FIG. 3 is a block diagram showing the configuration of the wireless device 11. The wireless device 11 arranges the data signal 14 input from the router 12 so that the data signal 14 can be easily wirelessly transmitted by the baseband processing unit 16, and transmits the signal to the modem 17.
Performs signal modulation suitable for wireless transmission. The power is amplified by an amplifier 18 and output as a microwave radio signal 13 to an adjacent router via an antenna 19 having directivity.

On the other hand, a microwave radio signal 13 from an adjacent router is received by an antenna 19, amplified by an amplifier 18, demodulated by a modem 17, and then converted into a data signal 14 by a baseband processing unit 16 and transmitted to the router 12. Supplied. Upon receiving this data signal, the router 12 distributes the signal to a subordinate PC, server, LAN, or an adjacent router for transfer.

[0014] The conventional topology is a star-shaped point.
In the case of a two-multipoint wireless system, a detour route cannot be established when a failure occurs between certain nodes,
The present invention provides a point-to-
Since the point-based mesh topology communication is configured, when a failure occurs between any nodes, a detour route can be established without affecting other traffic. Further, even when a detour route has not been established, a route can be quickly constructed when a failure occurs.

The router 12 in FIG. 2, the baseband processing unit 16, the modem 17, the amplifier 18, the antenna 19, and the like in FIG. 3 can be realized by conventionally known technical means, and detailed description thereof will be omitted. .

[0016]

According to the present invention, since a point-to-point based mesh type topology communication using microwave radio is configured, a flexible network can be constructed flexibly and in a short time, and time can be reduced. It is possible to configure an optimal system for the Internet for transmitting IP data traffic that changes rapidly both spatially and microscopically and macroscopically.

Further, since it is not necessary to lay a wired cable, the system is economically excellent and the system can be easily expanded point-to-point.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a diagram illustrating a configuration of a wireless access node according to the present invention.

FIG. 3 is a diagram showing a configuration of a wireless device according to the present invention.

FIG. 4 is a diagram showing a conventional example.

[Explanation of symbols]

 1,21 Node 2,22 Internet Service Provider 3,13 Microwave Radio 11 Radio 12 Router 14 Data Signal 15 Wireless Access Node 16 Baseband Processor 17 Modulator / Demodulator 18 Amplifier 19 Antenna 23 Wired Cable

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5K030 GA05 GA11 GA19 HA08 HB21 HC01 HC13 HD03 JA01 JL01 JL07 JT02 JT06 MA01 MA07 5K033 AA04 AA09 CA17 CB01 DA02 DA17 DB01 DB09 DB16 DB18 9A001 BB04 CC05 DD10 JJ25 KK56

Claims (4)

[Claims] 1. A node for bidirectional transmission of a data signal between each Internet node or between Internet service providers is constituted by a radio access node for bidirectional transmission by microwave radio.
A mesh-type wireless access system, wherein the connection between the wireless access nodes has a point-to-point-based mesh-type topology configuration using microwave radio. 2. The wireless access node, under the control of an IP
PC or server that is the source or destination of the data,
A router connected to a LAN or the like and transmitting IP data, and a data signal input from the router is converted into a microwave radio signal and output to an adjacent router, and a microwave radio signal input from the adjacent router is converted. 2. The mesh-type wireless access system according to claim 1, further comprising a plurality of wireless devices that convert the data signals into data signals and output the data signals to the router. 3. The mesh-type wireless access system according to claim 2, wherein the wireless access node includes the same number of wireless devices as all the wireless access nodes adjacent thereto. 4. The wireless device converts a data signal input from the router into a baseband signal suitable for wireless transmission, outputs the baseband signal to a modem, and converts the baseband signal input from the modem into a data signal. A baseband processing unit that converts the signal into a signal and outputs the signal to the router; modulates a radio signal with the baseband signal and sends the signal to an antenna having directivity; A modem that outputs to the band processing unit, and transmits the radio signal only to a specific one of the adjacent radio access nodes, and transmits a radio signal transmitted from the specific one of the radio access nodes. An antenna having directivity for receiving and outputting the received signal to the modulator / demodulator. 3. The mesh wireless access system according to 3.