Siklu - wireless gigabit without frequencies. Installation experience
Very often, providers face the task of quickly traveling 2-3 km at high speed — connect a new house or group of houses, cross a river or highway. Coordination and installation of optics takes months.
Today I will tell you about a solution that allows you to build a gigabit link in a couple of hours - SIKLU . And there is no need to go through a long procedure of frequency coordination - the equipment is simply registered in Roskomnadzor.
The range of 70-80 GHz is a new page in the development of wireless technologies. For wireless communications, as many as 10 GHz are allocated (71-76 and 81-86 GHz), and such a wide bandwidth makes it possible to develop gigabit speeds. Until recently, the millimeter-range equipment was very expensive - many tens of thousands of dollars for a span, which frightened most providers. But then the first low-cost solution appeared (from $ 4000 per flight), and the market immediately revived. As a result, already in the first year, Siklu's EtherHaul systems dominated the market. We tested an affordable solution with a built-in one-foot antenna that allows you to create a reliable (99.995%) channel at a distance of up to 2 km in any weather. The device itself is compact, lightweight, with copper and optical gigabit interfaces on board.
Regarding the weather should be said. Millimeter systems, as the name implies, have a very small wavelength, and any precipitation adversely affects the signal flow. But this dependence is not linear - in some frequencies there are so-called “transparency windows”, where the attenuation is much smaller. As you can see on the graph - 70-80 GHz just in the transparency window.
Nevertheless, for reliability, a communication channel is designed with a considerable margin so that no fog or rain will lead to a communication break. In addition, Siklu supports adaptive modulation.
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Consider an example of the implementation of the scenario of connecting network segments for the transmission of Internet and IPTV traffic. Typical neighborhood near Moscow. The passage of roads through punctures or cable sewage requires more than an annual approval, and the city administration does not allow to draw air lines through the main roads. Exit - wireless gigabit radio channel.
Initial data:
Calculate the signal level and availability of the radio channel
We install equipment
Adjust the antenna. This is the most painstaking process - the antenna beam is only 0.8 degrees.
Achieved signal level.
Adjustment process:
youtu.be/fZejegjNQHc
Statistics of user traffic from the established channel - the peak load reaches 400 Mbit, that is, the system has sufficient reserve capacity in case of an increase in the volume of user traffic.
On this channel, traffic is highly asymmetric, which means that, with the ability of EtherHaul to work in the asymmetrical division mode, the uplink \ downlink bandwidth 75 \ 25% and even 90 \ 10% can offer users more useful bandwidth.
Channel installation time is 1 day. The adjustment time and device settings (without taking into account the time for installation of the pipe stand and cable pulling to them) - 2.5 hours.
The performance of the channel is 1 Gigabit.
Services provided: networking, Data and IPTV traffic (hooked up group of high-rise buildings).
Network role: L2 + switching, management VLAN and 3 VLANs for different types of traffic.
The prioritization of real-time traffic in the strict queue is configured. And it works.
Today I will tell you about a solution that allows you to build a gigabit link in a couple of hours - SIKLU . And there is no need to go through a long procedure of frequency coordination - the equipment is simply registered in Roskomnadzor.
The range of 70-80 GHz is a new page in the development of wireless technologies. For wireless communications, as many as 10 GHz are allocated (71-76 and 81-86 GHz), and such a wide bandwidth makes it possible to develop gigabit speeds. Until recently, the millimeter-range equipment was very expensive - many tens of thousands of dollars for a span, which frightened most providers. But then the first low-cost solution appeared (from $ 4000 per flight), and the market immediately revived. As a result, already in the first year, Siklu's EtherHaul systems dominated the market. We tested an affordable solution with a built-in one-foot antenna that allows you to create a reliable (99.995%) channel at a distance of up to 2 km in any weather. The device itself is compact, lightweight, with copper and optical gigabit interfaces on board.
Regarding the weather should be said. Millimeter systems, as the name implies, have a very small wavelength, and any precipitation adversely affects the signal flow. But this dependence is not linear - in some frequencies there are so-called “transparency windows”, where the attenuation is much smaller. As you can see on the graph - 70-80 GHz just in the transparency window.
Nevertheless, for reliability, a communication channel is designed with a considerable margin so that no fog or rain will lead to a communication break. In addition, Siklu supports adaptive modulation.
')
Testing
Consider an example of the implementation of the scenario of connecting network segments for the transmission of Internet and IPTV traffic. Typical neighborhood near Moscow. The passage of roads through punctures or cable sewage requires more than an annual approval, and the city administration does not allow to draw air lines through the main roads. Exit - wireless gigabit radio channel.
Initial data:
- Installation engineers - 2 people
- Siklu equipment - 1 set
- Radio - 2 pieces
- Multimeter for antenna alignment - 2 pieces
Calculate the signal level and availability of the radio channel
We install equipment
Adjust the antenna. This is the most painstaking process - the antenna beam is only 0.8 degrees.
Achieved signal level.
Adjustment process:
youtu.be/fZejegjNQHc
Statistics of user traffic from the established channel - the peak load reaches 400 Mbit, that is, the system has sufficient reserve capacity in case of an increase in the volume of user traffic.
On this channel, traffic is highly asymmetric, which means that, with the ability of EtherHaul to work in the asymmetrical division mode, the uplink \ downlink bandwidth 75 \ 25% and even 90 \ 10% can offer users more useful bandwidth.
findings
Channel installation time is 1 day. The adjustment time and device settings (without taking into account the time for installation of the pipe stand and cable pulling to them) - 2.5 hours.
The performance of the channel is 1 Gigabit.
Services provided: networking, Data and IPTV traffic (hooked up group of high-rise buildings).
Network role: L2 + switching, management VLAN and 3 VLANs for different types of traffic.
The prioritization of real-time traffic in the strict queue is configured. And it works.
Source: https://habr.com/ru/post/159343/
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