How to make friends of all operators in the stadium and not sow it with hundreds of

How to make friends of all operators in the stadium and not sow it with hundreds ofantennas.The FIFA World Cup has already begun, and in this regard, in several arenas of the championship, we deployed our new infrastructure. One of the arenas - "St. Petersburg", home stadium FC "Zenith". In this post we will talk about how the connection is made on one of the main venues of the tournament, where we hide the antennas, and why our engineers go four thousand steps before each match (if not more often).     material on how to monitor the mobile network in Moscow ...
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Influence of signal frequency on the energy of radio links in free space

Influence of signal frequency on the energy of radio links in free spaceWhat changes when the applied frequency band is changed in radio communication is not always correctly formulated even by experienced radio amateurs. On the one hand, the formula for transferring Friis is extremely simple, and there seems to be nothing to discuss. On the other hand, in this formula, in addition to explicitly mentioning the wavelength λ, it is implicitly hidden in other coefficients. There are many statements, notes and articles, that with higher frequencies the power of radio links is worse, there are no less articles of "myth exposures" - saying that there is nothing worse than ...
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Sochi.Kamera: the features of creating a project in general, completely, completely from scratch, without standards and already implemented examples

Sochi.Kamera: the features of creating a project in general, completely, completely from scratch, without standards and already implemented examples Sochi.Camera - A site with broadcast of streams from more than 300 web cameras installed in Sochi and its environs. The site and the entire service is non-commercial, created and maintained on its own funds by a local ISP "Business Communication" , already almost 10 years. In this post we will describe how to code from absolute zero; about the battle with YouTube (we won); why free software is bad, and free video streaming service is good. Perhaps in the future, when they turn to us with another proposal - write for 100-200 thousand rubles. the same service as Sochi.Camera, we instead ...
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Notes IoT-provider. Activation and security in LoraWAN

Notes IoT-provider. Activation and security in LoraWANHello, dear fans of the Internet Things. Continuation of IoT-provider's notes.
 
The first part of > || > The second part is > || > The third part is > || > The fourth part is
 
Today it's time to talk about security in LoRaWAN. There are many rumors and legends. We will try to understand how this works and what the risks are.
 
In general, to move to the topic of security, you'll have to do a little introductory and talk about the initial initialization of the radomodule on the network. This process in LoRaWAN is called activation.
 
For brevity, I will list below the list of terms ...
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Outdoor communications improve the performance of

Today IT is an integral tool of the work of employees of almost any company. Connecting to corporate resources and using the means of communication are necessary for business continuity.
 
 
Outdoor communications improve the performance of Office workers in a warm time often use the office yard for negotiations, solitary work, communication, rejoicing in the silence and fresh air.
 
 
Drivers arriving at the warehouses already in the parking lot would like to go to the network and receive further instructions.
 
 
The experience of visiting the shopping center begins with the customers ...
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Notes IoT-provider. Zoo accounting devices

Notes IoT-provider. Zoo accounting devicesI continue the series of articles about the IoT-provider experience based on the LoRa network. Beginning here and here .
 
So, the test network was launched, and we were going to start connecting pilot subscribers.
 
It turned out as always: they were afraid of one, they did not even think about another. As a result, the first cost, and the second created a bunch of problems.
 
Most of all we were afraid that in real conditions the network would start to work somehow differently than on tests. When the first subscriber showed us 40 cellars in which about 50 water meters stood, it became ...
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Notes IoT-provider. Introduction

Notes IoT-provider. IntroductionHello, dear readers of Habr. My name is Oleg Plotnikov, I am the director of the Center for Industrial Internet of one of the IT companies.
 
With this article, I would like to start a whole series of notes about Internet Things and specifically about LoRa technology. About her have repeatedly written on Habr, wrote interesting and from different sides. However, our Center has built and has been running the LoRaWAN network for almost a year and we have accumulated a lot of experience in the practical operation of this technology. Let's agree, I do not set as my goal the PR of the company I work ...
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Notes IoT-provider. Coverage

Notes IoT-provider. CoverageThe second part of the cycle "Notes IoT-provider." You can start with here .
 
So, we decided to build a network.
 
In fact, everything was somewhat different. We had a task. More and more different companies turned to us about the remote reading of the meter readings. Partly, we solved this with a whiff, but you can not drag out the vituha everywhere. And we were puzzled by the search for an alternative way.
 
We analyzed the market, we decided that LoRa is the best for our task. Chose from several standards. But "Strizh" pushed proprietary, NBIoT required frequencies, and indeed, last year's ...
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By the Day of Radio. O communication, you are a world

By the Day of Radio. O communication, you are a worldToday is the Day of Radio and Communication, perhaps the most beloved engineering festival in Russia. It is celebrated by employees of cellular and fixed communication, radio, developers, engineers. And this is not surprising, because no company, no one thinks himself today without communication. Every year at industry conferences and in radio and communication publications, a quick end or, at best, a transformation beyond recognition is predicted. But nevertheless, technologies are continuously developing: in 2003 there was still a paging communication, and this autumn the world is waiting for ...
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Geolocation in the premises based on iBeacon. Solution Aruba Meridian

Geolocation in the premises based on iBeacon. Solution Aruba MeridianGeolocation in premises on the basis of 4]) Showed that for the effective use of BLE navigation a complex solution is needed, including both beacons and a high-quality software. An example of such a solution from a well-known vendor of network equipment will be analyzed in this article. Interested readers are invited to the cat.
 
3]), However, its active promotion on the domestic market began relatively recently. From the many other solutions for BLE navigation, this option is distinguished primarily by the integration of beacons, cards and applications for smartphones under a single management ...
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