KR200280665Y1 - Combined System of Laser Equipment and Wireless LAN Equipment for Stable Laser Transmission Network - Google Patents

Abstract

The present invention relates to a system for compensating for vulnerable to the natural environment such as fog during transmission using existing laser equipment, and to ensure stable transmission backbone network and stable transmission to subscribers in the downtown area.

In the case of optical transmission, which is widely used for internet and leased line service, it is often impossible to construct its own backbone network in urban areas due to the cost of fiber laying and various constraints. And in order to guarantee the transmission stability when constructing such a backbone network, duplication should be generally performed.

Therefore, the system of the present invention uses the laser transmission method that can be configured quickly and inexpensively, so that the natural environment such as fog, rain and snow, which are disadvantages of the laser, to ensure stable transmission to the backbone network and subscribers in the downtown area The backup network can be configured by wireless LAN transmission to compensate for failures in the network. The system of the present invention adopts the ISM band (2.4GHz, 5GHz band) wireless LAN transmission method as a backup device, the operator has no burden on the frequency usage fee, and has advantages such as high availability rate, speed of installation, and low device cost.

Description

Combined system of laser equipment and wireless LAN equipment for stable laser transmission network {omitted}

The system of the present invention is a laser transmission method that can be configured quickly and at low cost. When constructing a transmission network in a downtown area, it is possible to compensate for the disadvantages of attenuation of the natural environment (especially fog and cloud) caused by laser straightness. In order to construct the system by adopting the wireless LAN frequency (using the ISM band of 2.4GHz and 5GHz band) with no frequency fee as a redundant network, a network that can guarantee the minimum transmission capacity to subscribers with a stable network is constructed. To do it.

In the real transmission network, the redundant system for stable network configuration is the backup equipment of wired equipment (e.g. optical transmission equipment) in case of the failure of one equipment with two identical equipments. In order to stabilize the network, the system is equipped with wireless microwave equipment. However, their methods are not perfect for overcoming high costs, difficulty in installation, burden of operators due to frequency usage fees, and obstacles to the natural environment (rain, snow, etc.).

The present invention system uses the laser transmission module and the device 16 for primary transmission to secure the stability of the transmission network, and sets the transmission path to the WLAN transmission module and the device 22 configured in the backup form when a failure occurs in the laser transmission ( Dynamic setting function) and the laser transmission module and the device 16 and the WLAN transmission module and the device 22 are simultaneously loaded and transmitted, and the transmission status continues even if either of the two modules and the device fails. There are two functions that can be selected (Laod Share function).

In order to configure the Load Share function, when using Layer 2 modules and devices, a loop occurs in the transmission path due to the nature of Ethernet transmission, which makes it difficult to transmit data to a subscriber. Therefore, it is possible to overcome this loop phenomenon by using the Layer 3 module and device (7). In case of load-sharing transmission, if a layer 2 module and a device are placed between the layer 3 module and the device (7) and the laser transmission module and the device (16) or the wireless LAN transmission module and the device (22), load balancing is performed. Only 50% of the maximum transmission capacity of the device can be transmitted. Therefore, it is possible to use the system in the same way when constructing a small capacity network, and the Layer 3 module and the device connected to the laser transmission module and the device and the WLAN transmission module and the device 16 to use 100% of the maximum transmission capacity. Each of (7) may be set separately or may be separated by a setting so that the layer 3 module and the device 7 may be separated.

In the case of the dynamic setting function, there are two types of laser transmission module and device 16 and wireless LAN transmission module and device 22 that are always ON and OFF (replacement module and equipment are required separately). 100% of the maximum transmission capacity of each module and device can be transmitted. The maximum transmission capacity of the laser transmission module and the device 16 is 40Mbps or more, and the maximum capacity of the wireless LAN transmission module and the device is 5Mbps or more.

Therefore, when a network is constructed with the system of the present invention, transmission is usually performed with a laser transmission (availability of 99.95%) with a transmission capacity of 40 Mbps or more, and a transmission capacity of 40 Mbps or more can be guaranteed to maintain minimum transmission network stability in the event of a failure. .

1 is a diagram illustrating a form transmitted when an actual network is configured using the system of the present invention. That is, in the normal state, transmission using the laser transmission using the 6 paths of FIG. 1 is performed, and when the failure of the laser transmission network occurs, transmission using the WLAN transmission using the 5 paths of FIG. 1 is performed.

Figure 2 is a representative view of the present invention shows the actual device configuration of the present invention. The Layer 3 module and device 7, the laser transmission module and device 16, the WLAN transmission module and the device 22 of FIG. 2 are each composed of modules, and three modules may be configured as one device, respectively. It may be divided into three devices. And if it is not Load Share type transmission, in case of normal state and fault condition, transmission path setting for module 16 and device 22 and module 22 and device 22 is done in Layer 3 module and device.

<Explanation of the code | symbol about the principal part of drawing>

1. Designed device station: Transmission station using the designed device

2, 7. Layer 3 Modules and Devices: Role of Traffic Routing and Switching

3, 22. Wireless LAN transmission module and device: Wireless LAN frequency (2.4GHz, 5GHz band) transmission module and device for the dual network of laser transmission

4, 16. Laser transmission module and device: Laser transmission module and device for redundant network of WLAN frequency transmission

5. WiFi frequency transmission path

6. Laser transmission path

8. Shared Memory: It consists of System Buffers (9) and Packet Buffers (10), where it stays for a while before I / O data is transmitted.

11.D-Bus: Path through which data is transmitted

12. Network Interface: Module for accessing the Internet network and other transmission equipment for data transmission to the network or subscribers.

13. CPU: Process for data processing

14. CPU Memory: It consists of Routing Table (25) and Switching Cache (15), and it is a place to store data for CPU processing.

17. Laser Transmission Transmitter: A module for transmitting laser transmission, which is composed of a transmitter and a lens.

18. Laser transmission receiver: It is a module for receiving laser transmission and consists of a light receiver and a light receiving lens.

19. Modem section: Modulation and demodulation section for transmission on the wireless LAN frequency (2.4GHz, 5GHz band)

20. RF section: Radio frequency transmission section for transmission to the wireless LAN frequency (2.4GHz, 5GHz band)

21. Antenna part: Antenna of wireless LAN frequency (2.4GHz, 5GHz band)

23. Wireless LAN network interface: connection to other transmission equipment for wireless LAN transmission

24. Laser network interface part: connection of other transmission equipment for laser transmission

In Figure 1 of the present invention, it shows a network configuration form using the devised device. When constructing the network using the system of the present invention, it is possible to configure various types of networks such as ring network, star network, branch network, mixed network.

2 is a schematic diagram of a system of the present invention, and is composed of a Layer 3 module and apparatus 7, a laser transmission module and apparatus 16, and a WLAN transmission module and apparatus 22. The Layer 3 module and the device 7 provide a connection to the Internet network and a connection interface with the laser transmission module 16, the wireless LAN transmission module and the device 22, and use the Routing Table 25 to set up a dynamic setting function. And Load Share function.

The configuration of the Layer 3 module and device 7 includes a shared memory module 8 that can be temporarily stored for transmission of input and output data. The shared memory 8 is composed of system buffers 9 and packet buffers 10. Consists of Then, the D-Bus 11 for providing the transmission path of the data and the Network Interface 12 module for accessing the Internet network and other transmission equipment for data transmission to the network or subscribers, and data processing And a CPU Memory 14 which provides a place to store data for processing by the CPU. The CPU memory 14 is composed of Routing Table 25 and Switching Cache 15, which enables the dynamic setting function and the load share function.

The laser transmission module and apparatus 16 is a module and apparatus for laser transmission of a large capacity (40 Mbps or more), which is a module for transmitting laser transmission. It consists of a laser transmission receiver 18 consisting of a light receiving unit and a light receiving lens as a module for receiving, and a laser network interface unit 24 which is a connection part of another transmission equipment for laser transmission of a 100Base-T director.

The wireless LAN transmission module and apparatus 22 is a module and apparatus for medium and small capacity (more than 5 Mbps) wireless LAN transmission, and a modem unit 19 serving as a demodulation function for transmission to a wireless LAN frequency (2.4 GHz, 5 GHz band). And the RF unit 20 for transmitting to the wireless LAN frequency (2.4GHz, 5GHz band), the antenna unit 21 for radiating the WLAN frequency in space, and other transmission equipment for wireless LAN transmission of 10Base-T or more The denial wireless LAN network interface unit 23 is configured.

When constructing a network using the system of the present invention, it is possible to use the advantages of low cost equipment cost of laser, speed of installation, large capacity transmission, and at the same time, the stability of the wireless LAN network with high transmission availability. In addition, the two transmission systems do not have to pay a separate fee to reduce the burden on the operators.

Therefore, when the duplex network of the laser transmission module and the device and the wireless LAN transmission module and the device are configured, a stable duplex network can be formed without inexpensive equipment cost, ease of installation, and additional frequency fee, and a large laser transmission capacity can be provided to the subscriber It is possible to provide a minimum transmission capacity (5Mbps or more) to the subscriber in the event of a failure of the laser network can provide reliability for laser transmission.

Claims (1)

Laser transmission module and device connected in duplex form and wireless LAN transmission module and device combined with Layer 3 module and device with dynamic setting function and load share function to achieve stable transmission