Wireless LAN Wi-Fi is a trademark of Wi-Fi Alliance. Wireless Fidelity accuracy can be translated as a wireless data transmission. The most common application of this technology is office wireless network by means of which the employees are connected to the Internet and internal corporate resources with handheld devices (laptops, tablets, smartphones, and tablets).
Design and installation of wireless networks Wi-Fi is a complex engineering task in addressing the participation of specialists from several directions. Ensures that the network meets all requirements of the customer and provide a reliable service at all stages of implementation must be strictly followed the requirements for the placement of access points, antennas orientation, laying SCS for food hotspots PoEi connection switches. Configuring hardware engineers must deal with knowledge of engineering and physics of radio wave propagation, as well as having experience with the equipment is installed. Otherwise, you can sell a lot of equipment which individually satisfies all the requirements, but installed so that is a "pile" expensive not functioning "iron." Our experts have the appropriate education, knowledge and experience, as well as certified hardware manufacturers, so you can rely on us.
Design, implementation and support of Wi-Fi Solutions of any complexity: from hot spots in hotels, restaurants, hostels to wireless multi service networks with hundreds of access points and continuous coating large areas, buildings and areas, with authentication of mobile subscribers 802.11 X through the directory service (for example, Active Directory), monitoring systems and IDS / IPS. Standard wireless Wi-Fi (IEEE 802.11) defines as binding function devices, and optional, the implementation of which remains at the discretion of the manufacturer. The main feature of the equipment corporate sector is to use these functions. In our projects, Micro Tech Soft offer the optimal solution of the tasks with the use of equipment that has the necessary and sufficient for each situation functions.
We Implement Solutions Wireless Wi-Fi Networks
Recent years, wireless networking market over saturated solutions from various vendors. Aggressive marketing policy are some players in the market, often with an emphasis on advertising campaigns and attracting customers, and in the last turn on the quality of the proposed solutions. The task of choosing a reliable and high-quality equipment is not simple: it is desirable to have extensive experience in implementing and experienced engineers whose knowledge is confirmed by certificates. In our work, we rely on the experience of successful projects and offer solutions which have proved to be reliable and stable. We prefer portfolio Wi-Fi solutions for multi-service networks of three major vendors:
- Solutions Cisco wireless networks Wi-Fi.
- Solutions HP wireless networks Wi-Fi.
- Solutions DELL wireless networks Wi-Fi.
- Solutions D-Link wireless networks Wi-Fi.
Unique benefits of wireless Wi-Fi networks
Nowadays chip Wi-Fi is in any portable device (laptop, tablet, smart phone), allowing us to provide network access to any user without additional investment in wireless adapters.
Bring Your Own Device (born Bring your personal device). The concept of BYOD, security policy in which employees are allowed to bring their own portable devices (laptops, tablets, smart phones) to the workplace and use these devices to access to privileged Information and Services Company. The term also used to describe the same practice with respect to educational institutions where students use personal devices for educational purposes. With this approach satisfies all corporate security policies, local area network remains protected against potential threats. Staff and students are more comfortable with their personal devices, and this practice has become a common trend. Our task is to design and configure the Wi-Fi network in accordance with the modern needs of the customer.
High Level of Security:
In Wi-Fi used sophisticated methods of encryption that cannot be avoided or "break" of modern computer power. Access is provided as a password and certificate security. Log in wireless Wi-Fi network is as secure as a connection to the corporate switch port.
Not every application requires a further scalability (e.g, hotels, restaurants, cafes). But if there was a problem before you build scalable wireless network that is the highlight of the manufacturer and range of access points. Not all access points are scaled from a single (standalone access point) to the introduction of lightweight cloud points (lightweight access point), managed by the controller wireless Wi-Fi. In scalable wireless networks in the first stage is sufficient to install and configure multiple access points. Development of the company and an increase of not entail complete replacement of equipment. Will need only to update the software (firmware) on existing access points and add a wireless network components. In some cases it may be necessary to relocate the access points to the new location.
Roaming mobile subscribers "without a break."
To implement voice (VoIP) or video communications, corporate infrastructure mechanisms used fast roaming (handover analogue cellular networks.) controller wireless Wi-Fi service transmits mobile subscribers when moving from one access point to another without delay and packet loss.
Automatic Control and Management of Radio Resources System:
WLAN controller performs dynamic reallocation of frequency channels and transmitter power access points specified algorithms. Thereby reducing the level of interference from neighboring points. Protection mechanisms implemented access points - if one of the devices fails, the neighboring point to it and increase the power of "intercept" customer service does not suffer.
Protection against Interference Radio either and malicious clients:
Standard equipment Wireless Wi-Fi Network is not capable to recognize the interference from devices outside the standard IEEE 802.11. The task of monitoring the radio ether rests on the access point with optional spectrum analysis or specialized radio sensors, complementary infrastructure wireless network Wi-Fi. In some cases, this take on the role of the access point, switch to the analysis and not serving customers. After detection of the interference, the system rebuilds channel plan hotspots. And so that the channels adjacent interference assigned access points, the maximum distance from their sources. In addition, the system allows you to record attempts to "kill" the network and block malicious attempts to access password-guessing. In all cases, application logs events and create reports indicating the localization of wireless threats on the floor plan, and recommendations for their elimination.
Micro Tech Soft provides specialized services running on the controller wireless Wi-Fi, allow to determine the location of radiation sources in signal received multiple access points. These include both client computers and gadgets, and sources of interference (microwave, camera) device intruders ("jammers" access point - twins). The system determines their location and displays on the floor plan. There are several options for implementing such systems, the accuracy of the order of 3-5 meters. Position data can be used to collect statistics, as well as to prohibit the use of mobile devices in certain areas in the scheme of the building, such as meeting rooms or bathrooms.
Stable High-Speed Access:
To ensure high-speed access to the network, you must perform a number of factors, chief among which is competent WLAN design. The task of the engineer performing the examination or placement of the dots, to make a continuous coverage throughout the building. The system should be configured so as to not accept connections from clients outside the stable communication. In this case, the network will not be overloaded by resending packets, and all customers will be provided with a guaranteed connection speed regardless of load from each.
Increase Customer Loyalty:
In services (inns, hotels, hostels, restaurants, cafes, bars, business centers, shopping centers and malls, etc.) providing free Internet access via Wi-Fi significantly affect the customer's attitude a service provider and increases "stardom." For some potential customers to gain access to the Internet is crucial. In large shopping centers and malls, buyers get more information and reviews on this product via the internet and are more likely to make a purchase. In addition, on the basis of free access to Wireless Wi-Fi Network can be implemented interactive catalogue platform web portal, as well as a shopping cart, contextual advertising, interactive diagram of a shopping center, and other services.
Web Based Authentication:
Popular solution for hotels, airport terminals, shopping malls. Its essence is that the mobile subscriber is connected to the Wi-Fi Network without a password, open a web browser and enter arbitrary URL. Authorization system automatically forwards it to the authentication page, where he can enter your login and password. After successfully entering the user gets access to the Internet. Web-authentication system including popular and corporate wireless networks, Wi-Fi, whereas the username and password you use data from Active Directory.
Guest Portal for Hot Spots:
Often in places with public access before you get on the Internet, users are taken to the page of the service provider (restaurant, shop, mobile operator, etc.). Where, after watching the compulsory advertising, customer is redirected to the Internet. This approach is similar to the web-authentication, but does not require a name / password. Portal is a web-page, on which can be implemented any web services, a service for collecting statistics, the duration of connections, etc. It should be noted that due to advertising costs are covered by the client access to the Internet, which, may be limited by the speed / time / volume, etc.
Mechanism of Quality Control Service (QoS):
The mechanism of quality control service (QoS or Quality of Service) traffic classification by type and importance, sending high-priority data packets in the first place. Without this mechanism, it is impossible for the simultaneous passage of large amounts of network data, and simple voice communication (VoIP - Voice Over Internet Protocol) or video conferencing. In the absence of this technology relationship "croaks," interrupted image interlocutor fragmented and covered "squares".
Scope of Application of Wireless Wi-Fi Networks:
Wi-Fi solutions for small businesses. Small Business Solutions are simple, economic benefit and small network installation time. Wi-Fi in such decisions is provided for access to the internal network and the Internet. Support for voice and video, as well as streaming data is severely limited. Typically, the amount of data access points to solutions not exceed 4-5 pcs. When it is connected to each client 6-8. These configurations do not require hardware controllers, all access points are configured separately. To control network must carry identical manipulations with each point separately, which requires a high skill of personnel and reduces IT Functionality of the Whole System.
Wi-Fi solutions for the Midmarket:
In such installations can be used both software and hardware controllers wireless Wi-Fi. At the same time manage the entire network from one centralized point that allows you to quickly produce configure all access points. Their number varies from 10 to 50 pieces. Depending on your needs, can be implemented support guest network and hotspot roaming client devices (subscribers move between access points without disconnection) with support for voice and video calls. The decisions of this class can be implemented wireless IP-Telephony with the release of subnets for this class of devices and voice calls by assigning a higher priority than traffic through the mechanisms of QoS.
In his installations, this level is always used hardware controllers wireless Wi-Fi. Solutions involve the use of this class up to 3000 access points, and support simultaneous operation of up to 30,000 client devices. When using specialized sensors and radio access point’s function monitoring radio ether, can be realized Positioning System Subscribers, sources of interference and intruders threatening the security of the network. The system has the ability to heal itself: when interference occurs dynamic channel selection, the least affected hindrance. Implemented safeguards against failure (fail over).In the event of failure of the access point, your customers are intercepted neighboring access points without losing the connection. Security is the most reliable method is implemented: using RADIUS server with encryption WPA2 certificate-based security.
Warehouses and Hangars:
For warehouses and premises used specialized access points are protected from external physical influences. For this class of solutions is extremely important question is sitting access points and antennas, as surrounded by a significant presence of metal structures. To ensure stable and uninterrupted operation of systems requires strict adherence to the rules of installation. Solutions for warehouses different orientation to work with wearable terminals and bar-code scanners, as well as radio tags RFID. To control the movement of equipment and goods, specialized readers and sensors connected in a single system, and representing a single solution. Our company has extensive experience in successful installations of wireless Wi-Fi networks of this type, which is the guarantor of the quality of the work.
HORECA (hotels, restaurants, cafes):
Specificity of Wi-Fi solutions for hotels, inns, restaurants, involves the use of a wireless network to access the Internet, e-mail, VoIP telephony and video communications. Such schemes do not require the implementation of functions roaming customers without breaking the connection, since the main flow of traffic comes from fixed points. Software controller can be used to configure and monitor access points. To ensure data security and facilitate guests configure client devices use WPA2 encryption password-based, as it eliminates the possibility of listening to the ether and the interception of confidential information. For ease of administration and sales services of Internet access via Wi-Fi, you can provide your account each mobile subscriber.
In addition to commercial use, the trend is gaining momentum to deploy Wi-Fi networks in the educational institutions. In schools and universities with a wireless tablet PC completely transforms the entire educational process in an interactive environment, which can significantly improve the quality and level of education. For attending lectures is not necessarily physically present in the classroom, the question of access to the media: paper benefits, libraries, schedules. Interaction between teacher and student becomes available anywhere in the world.
Using Wi-Fi in medicine, it is instant access to the latest information from the Internet, any reference books, the ability to prescribe a single touch of the screen, storage and redundancy of all patient records on servers, etc.
Solutions for Operators:
The main problem when deploying the network is the limited capacity of each cell. All speed, affordable base station is divided between the parties. To increase speed, operators seek to reduce the number of subscribers, reducing the coverage area of each cell. This entails unreasonably high costs to increase the number of costly base stations to cover the same territory. In this case, use Wi-Fi. Cheap Wi-Fi Hotspots provide Internet access exactly where it is needed most. Voice calls are carried out through the existing subscribers of GSM and 3G networks. There is no need to deploy additional base stations 3G. In another scenario, Wi-Fi is set in conjunction with the short-range cells (pico-cells and femto-cells) in areas with the highest density of subscribers, to reduce the load on the cellular base station. Everything else, the vast majority of mobile devices equipped with Wi-Fi, even entry-level tablet computers and e-books, in which there are no other wireless communications. All of these devices can be connected to a Wi-Fi network operator, expanding customer base and increasing the economic viability of the deployment of such networks. The same situation is observed in networks 4G (WiMAX / LTE). Often these techniques are used as a line for the delivery of traffic at certain points. Then, this traffic is distributed locally through a network of Wi-Fi. This process is called offload. When the subscriber network continues to receive voice calls and SMS via cellular network, and all Internet traffic goes through Wi-Fi. Thus remain available services Internet telephony and video conferencing, such as Skype. Billing for Wi-Fi at Local Points can be arranged in any way possible: through payment terminals, paid SMS with a temporary password and the like.
Combining the two Locations Radio Bridge (point-to-point):
Our company offers solutions for the convenience of wireless communication channels point to point radio bridges. These technologies are essential for sites where there is no possibility to organize a communication channel over wired networks, or it is not economically feasible. For example, the relationship between the various buildings on the territory of one object profitable organized by radio, a reliable solution in cases where lay the cable underground or overhead lines to carry out the transfer of small amounts of traffic is not rational. An example of such solutions, building compound CAT located at a considerable distance from the main building. Usually used equipment manufactured specifically for the organization point-to-point, is not compatible with other equipment standard Wi-Fi. Apply specialized antennas with narrow radiation patterns, as well as the access point for use in all weather conditions, with extended temperature range, sealed and resistant to corrosion. Such decisions require a quality installation in compliance with all regulations and in accordance with the legislation in the sphere of communication. Possibility of installation of such systems is limited to line of sight conditions and cleanliness of the area, which extends between the radios antennas.
This area is called the Fresnel zone, is an ellipse with vertices at the antennas. Implementation of these conditions requires the preliminary signals intelligence and tend to install antennas on the mast. In this case, the farther the objects are, the lower the rate at which communication is possible. The average results for acceptable rate and quality of the compound can be expected at a distance from the junction of the order of 1-2 km.
Solutions for Private Homes and Apartments:
Typically, when you connect the Internet channel to the apartment provider offers the possibility of buying a subscriber unit with integrated access point Wi-Fi. Its Installation and Configuration Services staff provider, so our company is not engaged in decisions Wi-Fi in the apartments. However, the question of designing Wi-Fi network in the cottages and country houses require special attention, and is not a trivial task. In such solutions plays an important role not only design and quality of the wireless channel, but also the aesthetics of AP placement in a residential area. Increasing the coverage area of the house is achieved by installing additional access points. Since the main traffic in home networks, multimedia development system being based on the location of the consumer content and its sources - network attached storage NAS (Network Attached Storage), converters, satellite television, game consoles, laptops, printers with Wi-Fi, and so on. The policy assignment of frequency channels is determined by the client's needs, as a rule, the most high-speed configuration using standard 802.11n: 40MHz channel width and several MIMO spatial streams for devices with multiple antennas. Our specialists carry out a full range of activities to ensure wireless country houses and cottages.
Wi-Fi Systems can operate in two frequency bands - 2.4 GHz and 5 GHz. At first only 3 non-overlapping channels: 1, 6 and 11. Non-overlapping, so not subject to harmful interference. Overlap leads to a decrease in speed, increase response and resending packets. In the 5 GHz range of channels 8. Since 2011 the situation has changed. Using 5GHz devices now more preferable because of the small number of devices causing interference, and the larger the number of free channels. Currently, there are four standard Wi-Fi: A, b, G and n. Standard a works only in the 5 GHz band, b and g in the 2.4 GHz band. Newest standard n can operate in both bands. Standard b is obsolete, the maximum speed does not exceed 11 Mbit / s. Version a and g can maintain a connection at speeds up to 54 Mbit / s. N standard can transmit data at speeds up to 600 Mbit / s. This speed is achieved mainly due to the unification of the two frequency channels of 22 MHz to 40 MHz in one. Additionally, the systems are used with multiple receiving and transmitting antennae Multiple-Input – Multiple-Output (MIMO), which allow to arrange the 4 parallel spatial streams (depending on the number of antenna devices).
Wireless LAN Controller:
Wireless Controller without access point supports multiple SSID and one authentication method (for example, WP2). To use a broader functional and all the above advantages, it is necessary to introduce the wireless network controller. The controller is a separate hardware-software system that connects to the wired infrastructure, and connects all the access points in a single WLAN (Wireless LAN) network.
Access points used in the network Wi-Fi, can differ both in architecture (autonomous / controlled), and supported by functional and standards. For example, in the line of the access points can select the equipment with multiple radios (2.4 GHz and 5 GHz), with the support mechanisms of radio control, different amounts of flow MIMO. For most access points controlled by the controller, characterized by a "lite" version of the firmware - customer management functions performed by the controller, each access point "specializes" only in conjunction with customers over the air and transfer all the data to the controller via a secure tunnel.