What is lsb in children's watches. Lbs - what is this designation and how to convert lbs to kg

Greetings to all! Review hero: Chinese LBS + GSM/GPRS tracker.
Exactly so and exactly observing all the letters of the name. Because our brethren from under heaven consciously or unknowingly omit the first and most important letters. I want to warn you right away: yes, I know that there has already been a review of such a device, but there are some nuances that need to be disclosed and clarified. What I will try to do below.


The prehistory of such purchases is probably the same. First, we press the button to pay, and then, after receiving the goods and stupid surprise, “why did I buy this crap?” - we begin to think and frantically search for descriptions and reviews, which often turn out to be very sad.
And experience, the son of difficult mistakes ... Sorry, I will not be distracted :)

This device is theoretically designed to protect and determine the position of your vehicle on the territory of our vast homeland in case of theft by SMS and by card through a special service. Why theoretically? Because the accuracy of determining such a position in practice depends on many factors, including very dependent on the method of determining this position.
As a bonus, the manufacturer offers a wiretapping function, i. when you call the device for a long time or by sending a command, the microphone turns on or the device itself calls you back and you can hear the villainous plans of the kidnappers.

Let's make a digression and consider ways to determine coordinates on the ground using devices.

There are at least 2 ways to determine coordinates:

1st method - by satellites (GPS, Glonass). This method is very accurate and this accuracy mainly depends on the number of satellites above your head, the absence of forced signal suppression special. devices, external weather conditions or external obstacles (roof, garage, vehicle body). The GPS receiver itself is also not unimportant. The accuracy of determining the coordinates also significantly depends on its quality and the surface area of ​​the built-in antenna, which affects the quality of the received signal.
So: the ideal tool for determining the signal in this way: a fresh receiver with a new chip, in a remote housing with a large GPS module. In this case, the accuracy can reach a few meters. And it pleases.

The 2nd method of determining the coordinates is indirect (LBS (Location-based service)), It is tied to the GSM network and is associated with obtaining the approximate coordinates of the subscriber, depending on the base station to which he is connected.
This method is indirect because it does not determine the EXACT position. With its help, we receive from the device data about the base station to which the subscriber is connected and the signal level, which can indicate the approximate distance of the subscriber from the station. We do not receive any information regarding the azimuth of the position. Because the station number is bound to the coordinates, we can only get the coordinates of the base station.
Many subscriber search and tracking services that provide cellular networks (MTS beacon) work on this principle. This method is suitable for use in large cities where there are a large number of stations, i.e. the probability of obtaining coordinates closer to reality increases.
Let's talk about accuracy. In the city, the cell size (coverage radius of one station) for the GSM1800 standard is 2.7 km, in the suburbs - 5 km, in open areas - 22 km).
22 km, Carl!!! And this is not happy. For the sake of fairness, we note that under certain conditions and in the case of using WCDMA and LTE, the accuracy can reach 50 m).
Now you understand what kind of accuracy we can talk about.

So, after the digression, let's take a closer look at the hero of the review.

Seller Features:

vibration sensor,
Battery built-in (optional),
SMS and web portal for tracking.
Dimensions: 56*39*13mm
Weight: 58g

Specification:

GMS frequency: 900/1800MHz or 850/1900MHz
Gprs: Class 12, TCP/IP
Voltage range: DC 9-38V
Standby current: ≈0. 2mA
Pound Accuracy: 10 m (2d-rm)
Operating Temperature: -2°C-+70°C
Working Humidity: %20-80%RH

I would like to draw your attention to the fact that the abbreviation LBS is not even mentioned here, but we see a tempting measurement accuracy!
The real measured current is 6-10 mA, in the GPRS enable mode and calls, the current reaches 70 mA.







Includes wire, tracker, instructions in Chinese and Russian.

Microprocessor control is implemented on a specialized chip MT6250DA, which is a GSM / GPRS processor on an ARM core. As far as I can understand, the filling can vary significantly.
On the board you can see a voltage stabilizer, an additional contact for a backup battery, a microphone.
The principle of operation of the device is simple.
Insert a SIM, link the tracker to your phone using the command,
change the access password. The password is required to enter critical commands. The password and other settings can be reset to default, there are specials. command to "reset" the device.
After binding, you can turn on the protection mode, i.e. when the sensor is triggered, the device sends an SMS or calls back. The principle of operation is not clear to me, however, alarming SMS came. The call back by SMS command and the incoming call to the device work, the microphone is enough for a small room or car, the sound is not very high quality.
WARNING: in order to deal with this device, you need to send a random SMS, and the armed mode, in turn, sends you an SMS at every opportunity. You need a plan with a solid supply of SMS, otherwise you can spend a lot of money without your knowledge!
Next, we are trying to configure GPRS. Using the APN command, we poison the provider's settings for the tracker. Correct installation cannot be verified. The CX command returns the entered data to us.

Tracking through the site implies a free service
Where this device is already registered. But in order for it to transmit its data, it is necessary that GPRS works and the server address is correctly registered. This is what the IP command is for. True, it is not indicated what exactly I should prescribe in it. I do not know the port on which this site receives data from the device.
As a result, the device is not visible on the site. Dead end.



Tracking via SMS implies that the device must send a link to the GOOGLE command with its position on Google Maps. Holding our breath, we enter the cherished command ... and SILENCE. The miracle didn't happen. Thinking… how does an LBS device get GPS data based only on the base station number???? No answer. Possibly through a service using GPRS…
But this is just guesswork.

It would seem that sitzauia is hopeless.

However, I decided to try another command. It's not in the manual, but it works.
We type GOOGLE#… and in response we get a string with a link to the gps588 website indicating the magic numbers mcc, mnc. lac, cellid. This is information about the base station. With their help and with the help of a special service, for example, we can get a point on the map. And this is already pleasing.
add: many commands in the manual are written without #. Therefore they don't work.

Pros:
- the device seems to be working,
- we can receive feedback by voice from the installation site (wiretapping),
- we can get an alarm when the tracker is hit,
- we can connect the Beacon service from MTS to this SIM card and receive data through their service,
- we can get LBS data from the device and determine which base station it is located near,
- the device has a wide range of supply voltage and the ability to connect a backup source.

Minuses:
- the device is not autonomous,
- it does not work as stated: it does not give coordinates on the map, it is not tracked through the service,
- for 5-8 additional dollars you can get a device with a real GPS sensor.

The seller offers a half refund without scandals.

PS delivery within a month with the left track, although registered airmail is indicated.
PSS cat in a slight sadness

I plan to buy +19 Add to favorites Liked the review +39 +70

Some functions, even on smartwatches for children, may raise questions. Such an important feature as LBS is often left unknowingly turned off. Many parents do not delve into how useful it is and what it is built in for. Let's see what this function is.

Standard features in any smart watch models

All smart watches can perform standard functions, among them:

  1. Receiving calls on the device;
  2. outgoing calls;
  3. Location determination;
  4. Emergency call button for communication with parents;
  5. Sending voice messages
  6. Listening to your surroundings
  7. Pickup sensor. If the child has removed the watch, a notification will be sent to the parents' smartphone.


Ways to determine the location of the owner

The main function for which smart watches are purchased is to track the location of the child. This becomes possible in several ways:

Via GPS

The location of the child is established via satellite. A command is sent through the application on the smartphone, and the watch gives out reliable information. If there are no barriers to the signal, the received coordinates will be as accurate as possible.

Via LBS

So we come to the question of what Lbs is in children's smart watches. Literally translated as location-based service. In simple terms and to the point, geolocation is determined based on the stations of your chosen mobile operator.

Read also:

Apple Watch S2 Sport 42mm - detailed review

The LBS option is needed in order to get the approximate coordinates of the location of the child if the signal from the satellite does not pass. This is possible if the baby is, for example, in a building with thick concrete walls.


How it works

LBS is a cellular web that is divided into segments. Each of them is assigned to a specific tower. Location coordinates are not determined by tower-to-tower distance. It is calculated as the intersection of the segments with each other and the hit of the smart watch in the field of towers.

In places where there is no mobile coverage, for example, in the forest, there is little hope for LBS. Even if towers can be installed somewhere, the distance between them can be significant, and, accordingly, a large error in the result.

Via wireless connection

Many parents, seeing that the watch supports a wireless connection, assume that this way you can access the Internet, download games, and so on. wi-fi is needed to more accurately determine the location of the child in those places where the GSM signal does not pass.


Do I have to pay

Unlike a phone, this device requires mandatory registration through the official app. It and the basic settings do not require payment for themselves. You only pay for hours. They do not have a number, so a SIM card is required for full-fledged work, which is inserted into a special slot. Buyers pay for the services of a mobile operator, as is the case with a conventional phone. We recommend purchasing a SIM card with unlimited Internet traffic, this will ensure the full operation of the device.

Read also:

Overview of the Huawei TalkBand B3 smart bracelet line: Lite, Active, Elite and Classic

Important: smart watches are designed not only to control the location of the child, but also to make him independent. If parents check every hour and receive an alert on their smartphone, the watch battery will quickly “sit down”. In normal watch mode, the device can work up to 3 days without recharging.

Watch models with LBS

Designed for toddlers 2-7 years old. All children's watches are distinguished by a bright design, except, perhaps, models D - 99 and D 100. They are designed for teenagers and the elderly, so they are distinguished by some rigor. Claimed features generally do not differ from each other, with the exception of a few additions. Battery capacity is standard everywhere.

Q-50

The clock can

  1. Receive calls
  2. Make calls
  3. 10 numbers can be stored in the phonebook
  4. 2 numbers are available in emergency mode;
  5. A remote call to the watch will allow you to listen to what is happening;
  6. Watch;
  7. Calendar;
  8. The distance zone can be expanded;
  9. The interface is completely in Russian.


Technological characteristics:

  • GSM communication
  • SIM card type - micro
  • The material for the manufacture of the device case and the strap is high-quality silicone that does not provoke allergies.
  • The minimum operating time without recharging is 1 day, the maximum is up to 3 days
  • The device charges in 1 hour
  • Battery capacity -400 MA.

Series - D

These models are made in gray and black colors. Designed for teenagers and seniors. Many older people refuse to show their health problems to other people, and such an accessory will not arouse suspicion. Starting with this series, there is protection against water.

Smart watches for children are exactly the way out that will provide peace of mind and safety of the nerves of parents. The modern metropolis is huge, it is fraught with many unpredictable events. What do parents think about when their child is late after school? How many nerve cells will no longer be restored when the children simply forgot to warn that on the way from school they will not go home, but to their grandmother? You can avoid all these unnecessary worries and fears by using a device that is already fashionable now, smart watches for children. Of course, in addition to taking care of the psychological state of parents, these devices can really be useful in the event of a real real danger.

In this article, we will explain in detail how smart watches help keep track of children. Here you will find video reviews of children's watches with GPS, the general principles of this technology and tips for the correct use of such devices.

Types of children's smart devices

Several types of devices are now available with which you can control your children using modern communication technologies. Children's smart watch combines a phone, a GPS beacon and many other interesting functions. Their variety depends on the device model, manufacturer and price. The main features, of course, are present in all devices.

In addition, there are simpler gadgets on the market with similar functions: trackers, key chains, toys with GPS. Smart watches clearly win the competition, as they have a number of advantages:

  • Strap for attaching to the hand, which allows children not to lose the gadget corny.
  • Variety of useful features
  • In principle, it is interesting for a child to have a modern technological device on hand. The only negative is that they are more expensive than small individual key fobs or trackers.

Children's smart watch

Smart watches for a child are distinguished by an amazing variety. People often wonder what is best for a child from all this mass of options. Before buying, you need to know how to choose the right watch for your child. Now wristwatch-phone is produced in many different modifications. Naturally, for such an important goal as security, it is necessary to responsibly study the issue of such devices. Before making a purchase, you need to study the information in detail, select a specific model, and only then visit stores or place an order on the Internet. If you immediately contact the store, then the sellers, using marketing tricks, will force you to buy what you need to sell to them, and not buy you.

How to choose a smart watch for your child and be sure of their work and reliability? Many people make a common mistake by buying the most expensive model without looking (after all, nothing is a pity for a child). And then they lament, looking at the broken device after the next rides from the hill. We hasten to please - among the budget models there are many worthy representatives. Many cheap Chinese watches are just as good as some of the much more expensive Western ones. It is necessary to take a sober approach to this choice: these devices are not the mercy of fashion, but a practical device for specific tasks. And in performing these tasks, it must be simple and reliable.

Appearance and design

External characteristics are also important. Children lead an active lifestyle, constantly moving, so incredibly expensive and cool adult devices will not work. Children simply do not need the bulk of their functions, as well as trendy design. Devices for children are made of special impact-resistant plastic and have a certain degree of moisture and dust protection.

Smart watches for young schoolchildren have a bright, colorful design, sometimes with pictures on the strap and case. There are many colors to choose from for both boys and girls. For teenagers, more serious watches with a GPS tracker are needed - their appearance is already of great importance for them, they will not walk among their peers with toddler devices. In this case, children's watches, in addition to functionality, should be stylish and fashionable. You don't want your child to shyly hide the device under his sleeve at the sight of peers, do you? Smart children's watches for teenagers have a serious, "adult" design.

Children's smart watch is not a toy. This is a serious device with a color screen, touch controls and a rich set of communication functions. This is the same cell phone, only smaller, able to track the location of the carrier. The case is designed so that children cannot get a battery or a SIM card, as well as knock down some settings. The devices have a pair of buttons for calling and an SOS button for quickly signaling to parents that the child is in a bind.

What can smart children's watches do?

  1. act as a cell phone;
  2. Send an SOS signal;
  3. Receive and send messages from and to authorized numbers;
  4. Determine location using GPS, LBS or Wi-Fi;
  5. Record information about the movements of the child for a certain period of time;
  6. They have the function, in fact, of showing the time and alarm clock;
  7. Send a notification about the level of battery charge;
  8. Send a notification about the triggering of the removal sensor from the hand;
  9. Determine and count fitness parameters - calories, steps, kilometers;
  10. Give a signal if a child crosses a virtual border (electric fence function);
  11. Wi-Fi triangulation function. This is necessary to prevent hacking from outside. Only parents can change the settings from their smartphones.

The life button in watches for children is present on all models. It allows children's watches to quickly send an “SOS” signal to their parents' phones if necessary. Some models are equipped with a take-off sensor. If the child removes the device, parents will receive a special message about this. The child will not be able to accidentally turn off the device. This requires the presence of an adult. Thus, they work always and constantly, as long as the battery power lasts.

Mobile phone features

Oddly enough, children's watches tell the time. With this necessary function, the development of technology began. In addition, the watch is a phone for children, allowing them to always be in touch with their parents. The devices support the GSM standard. Children's watch phone allows you to do without a mobile phone, which the child will simply lose sooner or later. The ability to make phone calls is present on all models. This is the basic function of all such devices.

Child location tracking

Children's smartwatches have become so widespread thanks to this feature. Some people call the device a watch for children with a GPS navigator. Others are looking for a watch - a phone for children with a GPS tracker. In fact, all these devices have this function. There are no devices with a navigator or with a tracker. In fact, this is a GPS beacon built into children's watches. But in fact, everything is somewhat more complicated. Tracking monitoring in smart watch for kids is not only a GPS beacon. The devices have a special set of technologies that allow you to monitor the child. A GPS beacon is one of the points of this complex.

Check the presence of a GPS module when buying Chinese devices! All models of Chinese watches can be supplied with or without a module.

What is lbs in children's smartwatches? Lbs (literally Location-based service) determines the location through the GSM network when, for example, a child is inside a building and is not available to GPS satellites. The device determines the cellular base station to which the SIM card is connected. Thus, it is possible with a sufficient degree of probability to determine the zone of the territory on which the device carrier is currently located. Sometimes parents unknowingly disable this feature. But it can be useful if the GPS does not work. Geolocation makes a smart watch for a child such an indispensable gadget and a faithful assistant for parents.

Using the tracking function in a child's watch, you can not only determine his location at a specific point in time, but also see the history of movements for a specific period of time, up to a month.

Many models have a Wi-Fi module, which, along with LBS, will track the location of the watch even more accurately in rooms or other places where this network is available. These technologies mutually complement and duplicate each other automatically, which allows you to always know where your children are.

Possibilities of wiretapping

Some models of children's smart watches can be tapped by parents. Such a watch for a child has a built-in voice recorder, which, when activated, records information and sends it to the parents' phone. Listening watches for children can be useful in extraordinary situations. This feature should perhaps be used to monitor small children. Teenagers won't be happy knowing their parents are eavesdropping. In this case, devices are useful, on which the child can independently turn on and off wiretapping, using it if necessary.

Camera Features

There are even children's watches with a camera. Such devices are useful both in terms of safety and are interesting for the child himself - it becomes possible to shoot a video or take pictures. Thus, a whole smartphone fits in a small children's watch. Children's watches with a camera may be of interest to a child who refuses to wear them initially. The video camera on such devices, of course, is rather weak in terms of characteristics, for the sake of the small size of the device and saving battery power. But in certain situations, it can be very useful.

How does the device work?

Now let's take a look at how this smartwatch for kids works. To figure out how to use smart watches for children as efficiently as possible, you need to understand what it is. We hope that thanks to the above information, this has already happened. Now let's take a closer look at what needs to be done so that the GPS modules and other functions perform their work stably.

SIM card

Most children's GPS tracker watches require a SIM card. The operator, in principle, does not matter. The SIM card of the children's watch must be activated, active, it must be paid for and an active Internet connection. Watches for children work in the GSM standard, so the requirements are the same as for a mobile phone SIM card. A SIM card for children's GPS watches can be installed in the device in various ways, information about this is provided by the manufacturer in the instructions for their product. Most often these are micro-Sim or nano-Sim formats. Pruning is best done immediately in the salon of the mobile operator upon purchase. The SIM card is inserted into a special slot, like on a mobile phone. It is often necessary to open the watch case with a sharp object in order to install the card. There is no need to connect 4g or 3g internet. For the needs of the device, 2g speed is sufficient, such a connection is more stable. After installing the SIM card, the device is ready to work.

Setting

Children's smart watches are set up before handing over the device to a child. Customization features vary by model. On some models, some settings can be made on the devices themselves (for example, set the time). The main pool of settings is made in a special application, which must be installed on the parents' phone. It is from him that all control is exercised. Regardless of the brand of device and application, the essence is the same. Children's watch must be turned on, then settings are made in the application. As a result, they are synchronized with the parents' phone, after which you can make any changes, respectively, only from this phone. Make adjustments carefully, following the instructions for a specific model. The operation of the device directly depends on the correctness of these actions!

Applications

Different models use different applications, depending on the manufacturer of the device. All of them are installed for free from the Play Market or the App Store, for Android or ios. The search is made by name or by reading the code from the box or instructions. Such applications are control programs for children's watches.

The bulk of the most common Chinese smart watches for children, the Smart Baby Watch, works through the Setracker app. You can read about how to set up setracker for children's smartwatches in a special article.

Chinese devices have the following features:

  1. They are cheap compared to branded counterparts, while they are made with high quality (but not all). On the market you can find many identical devices with different names and markings, as they are manufactured by different factories and are produced under different pseudo-brands (Kingwear, Wonlex, Lemfo, Tiroki, etc.) These devices are technically the same, but may have different firmware and, accordingly, work with various applications. This question must be clarified at the time of purchase.
  2. When ordering on aliexpress, you must use stores that are verified by reviews. Otherwise, you can buy watches with Chinese firmware, which will not be able to work adequately in Russia due to differences in communication standards, or will simply be of poor quality. You can buy them in special stores in the Russian Federation, where this problem is solved. The price, of course, will be more than on Aliexpress. But with a guarantee.
  3. Smart Baby Watch is not a brand. It's just "Smart Children's Watch" literally. They are produced in many factories in China. Some produce mediocre products, replacing electronic components with cheap counterparts, which reduces the quality of the product. Buy from trusted sellers!
  4. Prices for products in Russia are several times higher. Sold under various brands that are not related to China. The same devices can be bought on Aliexpress at a price several times cheaper.
  5. In the Russian Federation, there are worthy small online stores that offer quality goods at a normal price, a little more than on Ali.

What does the market offer?

You can choose the best smart watches for children only for yourself. The number of model options is very large. The spread of functions and prices is great. Below is a list of popular models. See links for detailed descriptions.

  • Chinese;
  • Casio G-Shock;
  • Elari;
  • Xiaomi;
  • Alcatel;
  • imoto.

Hello readers! Have you ever thought that one unit of measurement can be used in different contexts and mean different things. Don't be afraid, I'm not crazy and I'm not trying to blow smoke in my eyes, today we will look at the value of lbs what is it? Where can you most often find such an abbreviation and what does it mean.

Lbs as a unit of measurement

The first time I got acquainted with the Lbs indicator was completely by accident. If you read my blog, you probably know that I am fond of sports and have been doing it regularly for more than a year. And as soon as the first electronic scales appeared, I could not resist buying them.

Opening the box, pressing a few buttons (I don’t remember exactly how old I was then), I turned on the scales and immediately decided to use them for their intended purpose. Imagine my surprised eyes when the number 170 appeared on the screen. I was shocked, and only after a few seconds I realized what the catch was. The scales were not set to Kg, they showed pounds. And how to translate lbs into kg was not clear.

Convert to kg

  • Pound (from Latin pondus - weight, weight) - a unit by which mass and weight are measured.
  • The classic pound used in America and England is equal to 16 ounces or 453 grams;
  • A troy (English pharmacy) pound is equal to 12 troy ounces or 373 grams.
  • The Latin word "libra" means a unit that preceded the pound, in English-speaking countries the abbreviation lb is still found. Many of you have probably heard about the monetary unit of the pound sterling, which means the symbol £, which also goes back to the word "libra".

To convert Lbs to kilograms, you need to multiply the number of pounds by 0.453 kg.

Most often, this abbreviation is used in such concepts:

  1. Location-based service - a type of information and entertainment service based on determining the current location of a mobile phone.
  2. A measure of weight is lbs (the correct designation in singular and plural is lb).
  3. Lectori benevolo salutem. (L.B.S.) Greeting to a supportive public (Latin.) A formula of authorial etiquette that was used many years ago.

What is lbs tracker

Location-based service is an information and entertainment service based to determine the current location of a mobile phone. The visualization capability of a modern mobile phone (often used in a smartphone) will allow displaying on the screen, which will allow the tracker to be used to solve a variety of business, navigation and entertainment tasks.

LBS does not have to use the technological features of GLONASS, GPS or other satellite systems to determine the location. The location of a mobile phone, for example, can be determined using pre-known information about the location of the base stations of GSM, UMTS, etc. mobile networks, as well as information about the location of the WiFi hotspot.

In this case, in each case, the same method for calculating the position is used - a reverse geodetic resection.

GPS and navigation

Today, the GPS-monitoring system performs the function of a reliable tool to control and optimize the operation of transport. It allows you to get reliable information about where the car is located, how many kilometers it has traveled, what is the fuel consumption, etc. Do you use the GPS service? I think all readers of this article will answer: "Yes."


The GPS monitoring system is convenient not only for drivers, but also for company managers, because based on the analyzed data, you can make an important management decision, coordinate work at a higher level, and dispatchers and forwarders will be able to see the real and most relevant picture in order to quickly respond for any unusual situation.

But what if the key technology to determine location, GPS, is no longer functional, or has been adversely affected by the driver himself and did it on purpose? In such a force majeure situation, the only alternative is the LBS monitoring system, which has recently been supported in many existing systems.

Principle of operation

According to the principle of operation, LBS monitoring resembles GPS, but the signal source is not a satellite, but the nearest GSM station of a mobile operator.


Therefore, if for some reason the GPS signal is lost, you will quickly determine the location of the transport wherever there is a cellular network (and the more sticks on the phone that indicate the signal, the more accurately you can determine the location).

Monitoring is also used to control the movement of objects in places where the GPS signal is not available: it can be an underground parking, a tunnel, a concrete garage.

It is not as realistic to determine the coordinates as accurately as possible using LBS technology than using GPS. It all depends on the coverage density and the base station network, what the current local radio conditions are and the cell configuration.

For example, in the central large European town, the coordinate error can vary in the range of several tens of meters, on the outskirts and in a small town - up to hundreds of meters. In villages or deserts, accuracy may be reduced by several kilometers. But, according to my personal observations and calculations, the data from the cell site will allow you to accurately show on the map which road the object was traveling on. The accuracy of the run, of course, cannot be calculated, but the approximate location, as well as the approximate trajectory of movement, can be shown realistically.

Useful addition

We can come to the conclusion that, despite the fact that the functionality of LBS monitoring is inferior to GPS in terms of specifics and accuracy, as you probably already noted to yourself, it can be considered a worthy assistant and a “second possible option” if suddenly the GPS signal is absent or interrupted by interference .

Therefore, if you do not want your cars to be overlooked, always keep your finger on the pulse - feel free to find on the Internet how to set up the LBS detector correctly. You can monitor in manual or automatic mode.

By the way, LBS services are also actively used in the Yandex.Traffic app. If a person’s location is constantly updated, and a few minutes ago he was in the middle of the road and does not move, he should only sympathize: a friend is in a kilometer traffic jam.

Various schemes have been invented in the world to track the situation on the road: operational reports, cameras and detectors that automatically analyze the picture, and, of course, the software that LBS services use.

If you have any questions about this topic, please write in the comments. I will be glad if you become a subscriber. See you soon!

Text agent Q.

In contact with

Car trackers determine the location of the car by calculating the coordinates using signals from satellites to the GPS module. However, modern devices use additional A-GPS and LBS technologies to improve the quality of positioning. This article will discuss how these technologies work and what their advantages are.

For high-quality operation of the beacon (GPS-marker), it is necessary that the tracker receives signals from at least 3-4 satellites simultaneously. In this case, the American GPS satellite system or the Russian GLONASS system can be used. However, our GPS markers support both systems at the same time, which significantly improves the quality of positioning. However, satellite communication is not the only way to determine the location, in addition, satellite navigation systems are not without drawbacks:

  • in the conditions of a metropolis, high-rise buildings greatly limit the visibility of satellites, and in “dead zones” (tunnels, enclosed spaces, on narrow streets, in depressions) the receiver does not “see” them at all;
  • in the mode of receiving signals directly from the satellite, the GPS receiver consumes a lot of power, which is not suitable for devices that need to work offline for a long time;
  • after some interruption in receiving signals, the device needs time to contact the satellites and get the latest data (synchronization). That is, the owner of the car needs to wait a few minutes until the device is fully ready for use.

In order to minimize the impact of these shortcomings on the quality of positioning, tracker manufacturers use A-GPS or (and) LBS technologies. How do these technologies work and how do they differ?


A-GPS technology

To start calculating the coordinates, the tracker needs data on the current location of the satellites, and A-GPS technology allows the device to receive data not from the satellites themselves, but from the server where this information is available.

At the moment when the GPS receiver can receive signals, it must first detect satellites, and then operate with their signals, which requires a certain amount of time. A-GPS technology gives the tracker information about where to look for these satellites, so when you turn on the GPS receiver for just a few seconds, the beacon will already be able to send the coordinates of the location of the object. When receiving information, the Internet channel provided by the mobile operator is used, and the GPS chip itself is not used. However, if the object is outside the cellular coverage area, A-GPS cannot work.

Our devices support A-GPS technology, moreover, A-GLONASS (the joint technology of A-GPS and A-GLONASS is called A-GNNS) providing fast and accurate positioning in the most difficult conditions.

To transmit data (coordinates, signals), the GPS marker uses the Internet channel of the cellular operator, so the device periodically exchanges data packets with the nearest base stations. LBS technology allows you to locate an object on an electronic map of the LBS system, on which the base stations of cellular operators are plotted.

As a rule, within a city, a GPS marker is located in the coverage area of ​​several base stations at once, and its probable location is calculated from the point of intersection of the coverage radii of each of the stations. Location accuracy depending on the number of stations can vary from 50 meters to several kilometers (outside populated areas).

Interestingly, the "budget" devices of Asian origin, offered under the guise of GPS markers, determine the location exclusively using LBS technology. The GPS chip in such devices is simply absent. However, the cost of devices in some cases justifies their purchase. For example, the device can approximately orient the traveler in which city the luggage has landed in case of its loss.

Comparative analysis of the effectiveness of LBS and A-GPS technologies


The main advantage of A-GPS is a significant increase in the launch speed of the GPS receiver. The probability of the tracker disappearing from the visibility zone of all satellites at once (GPS and GLONASS) in modern conditions is extremely small, and staying in the "dead zone" can last only a few seconds. The tracker, using constantly updated data (via A-GPS), can receive a signal, instantly calculate and send coordinates (until the next signal disappears), this allows the tracker to track the route accurately and without interruption, and most importantly, find coordinates in the most difficult conditions quickly and accurately .

LBS technology uses a static database and allows you to get an idea of ​​the location of an object, but it cannot actually provide accurate coordinates. By itself, this technology loses to a GPS tracker in the accuracy of determining geographic coordinates, in addition, it does not provide additional information at all (moving speed, altitude). However, LBS can save the day, for example, if the car ended up in a "dead zone" where the attackers drove it "to suck", even approximate information about the location of the car will help law enforcement officers find the vehicle.

Therefore, when creating high-quality modern trackers, the manufacturer uses both technologies. The presence of LBS and A-GPS in the tracker improves the quality of the device, allowing you to eliminate the occurrence of "white spots" on the route, as well as the complete disappearance of the car from the "visibility" zone.