Wired and wireless communication lines are links between information stations, distribution modules and users. Today, wireless transmissions are becoming more and more popular. But due to the high cost compared to wired ones, not all enterprises can install them for themselves. However, wired lines are not highly available, but many of them have a fairly high range of operation and reliability.
Types of wired communication lines
Most network regulations define the conditional and mandatory properties of a conductive hardware component. These include:
- passing line;
- wave resistance;
- signaling lot of support;
- degree of protection.
The devices are represented by cables with copper texture and optical fiber:
- The coaxial cable has a copper structure, and the origin acts as a central link surrounded by an insulating medium.
- A twisted pair looks like eight or more pairs of folded links. Stranding is used to reduce the level of interference from the internal environment, and external ones that affect it. In a retinue due to the type of pair, a similar system of properties arises, like the resistance of waves.
- The fiber optic conductor is represented by a complex of six or more fibers dressed in insulators, and two samples are produced: single-hearth and multi-hearth. Their difference is in the distribution of light information in the fiber; in a single-hearted wire, the radiation (sent in a single instant of an hour) overcomes an equal distance and reaches the transmitter synchronously, and in a multi-hearted signal beam, it scatters.
Types of wireless communication lines
Wireless lines are represented by regime devices of various configuration abilities.
- Infrastructure BSS. Consists of a server point with a wired connection and several independent users. Quite popular for enterprises with a specific single localization.
- IBSS demo mode, which is presented between a point-to-point connection.
Access points are characterized as non-cabled network components, which allows multiple users to use this equipment instead of a central switching network generator.
Wired and wireless communication lines actively interact with each other and are able to attach their information-transmitting capabilities in any kind of localization. The wired network system is also designed to protect the data security system within the corporation.
Wireless lines at the exhibition
The exhibition event "Communication" will take place this year on the territory of the Russian platform for concentrating advanced ideas of industry, information and its transmission - in the Central Exhibition Complex "Expocentre". Here, leading international and domestic corporations, television and radio communication enterprises present their achievements in the field of programming and Internet transmissions.
Among the exhibits will be demonstrated innovative wired and wireless communication equipment, programs and applications of a service and business nature, transmitters, cellular signal novelties and much more.
Bluetooth or Wi-Fi Direct, MHL or Miracast - with the help of this article you will find the right connection for each device. CHIP will tell you which type of data transfer is better to choose in a particular situation Many people ask questions: how to play information from a smartphone on a TV screen, send music from a tablet to wireless speakers and access files from any device. There are many standards for connecting phones, TVs, computers and receivers, but the simplest choice is not always the best. Separate protocols, such as Miracast, MHL and Wi-Fi Direct, are already present in some devices, but not everyone knows about it. Often they can facilitate the interaction between devices, and in the future they can replace the connection methods that are popular today. We will cover the basic and latest wired and wireless communication methods and explain which connection is best for specific purposes.
Wireless connection
Such connections are much more convenient than cable, but are very sensitive to interference and often work more slowly.
WLAN and WI-FI Direct
Wi-Fi is always used where data transmission over a cable is undesirable or impossible (home network, public hot spots). First of all, such a connection is necessary for smartphones and tablets in order, for example, to download large amounts of data from the Internet or access files on other devices on the same network. As a rule, the connection between Wi-Fi gadgets is controlled by a router, and using the Wi-Fi Direct extension, devices can be connected directly, like via Bluetooth (Peer-to-Peer connection). This method is a direct competitor to Bluetooth and, thanks to Wi-Fi-based Miracast technology (see below), can partially replace wired connections via HDMI and USB ports.
Bluetooth 4.0 and APTX
Due to the low data transfer rate, Bluetooth is mainly used for communication between a computer and peripheral devices. The standard plays an important role in the transmission of audio signals. It can, for example, pair a smartphone with a headset, and in home entertainment, Bluetooth is often used to stream music from a phone to Bluetooth speakers via a receiver or directly. Starting with version 4.0, this protocol consumes significantly less power than before. In the field of High-End, as a rule, devices with the aptX codec are used, which process the signal as accurately as possible. Due to the advent of new Wi-Fi technologies (see above), Bluetooth may sink into oblivion.
Miracast
Apple once developed the AirPlay protocol to wirelessly stream content from iOS devices to TVs. Miracast should become an open alternative to this technology. Manufacturers such as NVIDIA, Qualcomm, Samsung and LG have announced their support and have already launched the first gadgets with Miracast on the market, including Samsung Galaxy S III and Google Nexus 4 smartphones. Miracast-certified devices must support Wi-Fi Direct and stream movies at 1080p resolution. Since the transfer rate of this technology is too low for 4K resolution, Miracast cannot fully replace the HDMI interface. Miracast-enabled TVs do not currently exist.
NFC
NFC is a wireless technology based on RFID chips and is already used for many purposes, such as cashless payment with credit cards. However, this method is only suitable for simple data transfer between two devices over a very short distance. Since Google introduced an NFC feature called Android Beam in Android 4.0, this protocol is widely adopted primarily on devices with this OS. The type of data transferred does not matter much, but due to the slow speed, NFC technology is mainly used for the exchange of files and small amounts of information. So, you can transfer applications, web links, Google Maps coordinates and contacts from smartphone to smartphone.
* Data shown for standard devices
In the modern world, there are practically no electronic devices left that are not connected to each other or the global Internet. Everything is connected to the networks: from mobile phones familiar to us to nuclear reactors and spacecraft. You can link any device in your office or apartment to a common network if it makes even the slightest sense. Would you like to see what the nanny does with your child in your absence? You are welcome. Or a couple of shots of unfortunate thieves in case of a burglary? It's easy too. It all depends on your imagination and financial capabilities.
A local area network is a computer network covering a relatively small area or a small group of buildings (house, apartment, office or company offices, etc.).
Depending on the method of physical connection, wired (copper, optical) and wireless networks can be distinguished. We will not go into details of various technologies using these types of physical connection of end devices. To create home and office networks, technology and a wireless counterpart are mainly used.
Which type of network is best for creating a home network, and which is better to use for creating an office network? To answer this question, let's take a quick look at the advantages and disadvantages of wired and wireless networks.
Wired LANs
Structured Cabling Networks/Systems (SCS)
SCS is a unified cable system for data, voice and video data transmission within a local area network or an enterprise network. SCS allows you to combine many information systems and services that are different in their functional purpose from different manufacturers, with different types of transmission media.
The basis for building a local network and information infrastructure of any modern company are structured cabling systems. The topology of the SCS laying allows you to easily increase the functionality and size of your network if necessary.
pros
- One system for any type of data and applications;
- Extensibility, ease of reconfiguration;
- Documentation for each node of the system;
- Warranty for the system up to 20 years of operation;
- Very high reliability
Minuses
- High cost of design and installation
Simple (unstructured) cable networks
They are conventional twisted-pair cable systems laid in cable channels. Different cable systems are used for data transmission and office telephony. Often they are a very sad sight: the wires are tangled, they just lie on the floor, under the tables (entrust the installation of the local network to qualified installers).
pros
- Low installation cost compared to SCS;
- Relatively high installation speed;
- High reliability.
Minuses
- Small warranty on the system;
- Complexity of system expansion, additional costs for expansion.
Wireless local area networks Wi-Fi
Wireless local Wi-Fi networks will increase the mobility of employees in office or industrial premises, get rid of a bunch of wires in the office or at home, in addition, eliminating the cost of installing and maintaining a wired network.
Wi-Fi makes sense to use in companies with a small number of workplaces or in the presence of a large number of wireless devices (laptops, netbooks, communicators, etc.). Most often, both types of networks are used simultaneously: wired networks and wireless Wi-Fi networks.
pros
- Ease and speed of network deployment;
- Low cost of deployment;
- Lack of wires in the workplace (at least part of the wires).
Minuses
- The transfer rate is shared among all Wi-Fi devices within their service of the same access point. This means that if the access point provides a data transfer rate of 300 Mbps and, for example, 5 laptops are connected to it at the same time, then the data transfer rate for each laptop will be 300 / 5 = 60 Mbps. But in reality, even less, since the volume of transmitted service information can reach 30-40%. This results in a transfer rate of about 36 Mbps per device;
- Environmental influence (trees, walls of buildings);
- Relatively low reliability;
- Low resistance to hacking if configured incorrectly.
The disadvantages can be partially covered by better equipment and the addition of more Wi-Fi access points to the wireless network.
In my opinion, in most cases, it is preferable for businesses to use structured cabling systems (SCS) - they will give you greater reliability, excellent bandwidth and a guarantee of protection from downtime. Wireless networks in the enterprise should be used where the specifics of the business require it, for example, large warehouse areas with a small amount of computer equipment used. In any case, you need to carefully weigh the pros and cons before you start designing a company's LAN.
For a home network of 2-3 laptops, a computer and a couple of any gadgets, a wireless network (Wi-Fi) would be ideal. Do not forget about setting up access point protection in order to prevent the theft of your personal data and Internet traffic.
Transferring information between computers.Wired and wireless communication.
There isthree main ways to organize computer-to-computer communication :
connection of two adjacent computers by means of a specialcable ;
transferring data from one computer to anothermodem using wired, wireless or satellite communication lines;
integration of computerscomputer network
Often when establishing a connection between two computers forone computer is assigned the resource provider role (programs, data, etc.),and after another - the role of the user of these resources . In this case, the first computer is calledserver , and second -client or workstation. You can only work on a client computer running special software.
Server (English)serve - service) is a high-performance computer with a large amount of external memory that providesservice other computers by managing the allocation of expensive shared resources (programs, data, and peripherals).
Customer (otherwise, workstation) - any computer that has access to server services.
Computer network (English)computer net work, fromnet - network, andwork - work) is a system for exchanging information between computers.
Users of a computer network get the opportunity to share its software, technical, informational and organizational resources.
Computer network is a collection of nodes (computers, workstations, etc.) and their connecting branches.
Network branch - is a path connecting two adjacent nodes.
Network nodes are of three types:
terminal node - located at the end of only one branch;
intermediate node - located at the ends of more than one branch;
adjacent node - such nodes are connected by at least one path that does not contain any other nodes.
Computers can be networked in a variety of ways.The way computers are connected to a network is called networking.topology .
Most commontypes of network topologies:
Contains only two end nodes, any number of intermediate nodes, and has only one path between any two nodes.
A network in which each node has two and only two branches attached to it.
A network that contains more than two end nodes and at least two intermediate nodes, and in which there is only one path between two nodes.
A network that has only one intermediate node.
A network that contains at least two nodes that have two or more paths between them.
Fully connected network. A network that has a branch between any two nodes.
The most important characteristic of a computer network is its architecture.
In the modern world, which is experiencing an information boom, it is becoming increasingly importantwired communication - telephony and the Internet, which allows people not only to communicate with each other over a great distance, but also to send huge amounts of information in a fraction of a second.
There are several typeswired communication lines :
copper twisted pair wires
coaxial cable
fiber optic communication line
The most common, cheap and easy to install and subsequent maintenance is twisted pair. Fiber-optic communication line, on the contrary, is the most complex and expensive.
Despite the rapid development in recent years of all kinds of wireless communications, such as mobile or satellite phones, wired communications will apparently retain their positions for a long time to come.
Mainbenefits wired communications before wireless are the simplicity of the device of communication lines and the stability of the transmitted signal (the quality of which, for example, practically does not depend on weather conditions).
The laying of wire (cable) communication lines for the provision of telephony and Internet services is associated with significant material costs, and is also a very laborious process. However, despite such complexities, the infrastructure of wired communication is constantly updated and improved.
Wireless network technologies are grouped into three types, differing in the scope of their radio systems, but all of them are successfully used in business. 1. PAN (personal area networks) - short-range networks with a radius of up to 10 m that connect PCs and other devices - PDAs, mobile phones, printers, etc. With the help of such networks, simple data synchronization is implemented, problems with an abundance of cables in offices are eliminated , a simple exchange of information in small working groups is implemented. The most promising standard for PAN is Bluetooth. 2. WLAN (wireless local area networks) - range up to 100 m. With their help, wireless access to group resources in a building, university campus, etc. is implemented. Typically, such networks are used to continue wired corporate local area networks. In small businesses, WLANs can completely replace wired connections. The main standard for WLAN is 802.11. 3. WWAN (Wireless Wide Area Networks) - wireless communication that provides mobile users with access to their corporate networks and the Internet.
At the present stage of development of network technologies, Wi-Fi wireless network technology is the most convenient in conditions requiring mobility, ease of installation and use. Wi-Fi (from English. wirelessfidelity - wireless communication) is a broadband wireless communication standard developed in 1997. As a rule, Wi-Fi technology is used to organize wireless local computer networks, as well as to create so-called hot spots for high-speed Internet access.
The future development of telecommunications services to a large extent lies in the competent combination of wired and wireless communications, where each type of communication will be used where it is most optimal.
150 years ago there was only one method of communication - wired radio. And although wireless radio communication has long entered our lives, wired methods of voice and text messaging still “work”. True, they have changed a lot since then.
What kind of connection happens, what are the principles of its work, what are the features - more on that later.
Radio classification
Wired communication, having only become popular, was immediately “squeezed out” by wireless mobile. But, the classification and technical parameters of wired radio communications are constantly improving. Operators offer new solutions and communication systems that are better than the previous ones.
So, every year the best means are offered for organizing wired communication at enterprises of any scale and direction.
Wired communication and radio communication
The principle of operation of wired radio is as follows:
- An autonomous transceiver uses radio waves to transmit a signal over an electrical cable to another radio receiver.
- As soon as the message is sent, it goes to the PBX or message switching center, which, in turn, is connected to the regional line
- Regional lines are connected to international
Such systems are most often used in small offices, but their more "advanced" modifications can also be used at state-level facilities.
Wired radio system
The main disadvantage of a wired radio communication system is signal loss on the cable. To transmit messages at the highest speed, fiber optic communication lines are used.
It is made of special plastic with a light guide of a couple of microns, then it is protected by a denser material - a filler, and covered with a sheath on top.
Optical fiber is used in the organization of backbone systems of wired radio communication, as well as when connecting wires to transceivers.
Wireless radio
Modern wireless radio communication is divided into mobile and satellite. Sometimes it can be attributed to IP-telephony.
In simple words, wireless radio communication can be called exclusively radio and satellite communications. But, today, many are accustomed to associate this concept with virtual and cellular communications.
Satellite wireless radio is built in such a way that the signal is transmitted/received by radio equipment directly via a communications satellite.
Cellular communication may also seem wireless at first, as the user does not need to connect to a network or outlet to communicate with another subscriber. That is, he can move freely around the entire perimeter of the network and negotiate. But.
Data that is transmitted via cellular communication goes to the radio tower, and then, via wires, is “transported” to the required subscriber.
As a conclusion
It is difficult to unequivocally answer which connection is better - wired or wireless. In each specific situation, the choice is made taking into account many factors. Therefore, you need to carefully weigh the pros and cons.
If you have questions regarding wired and wireless radio communications, our Company's specialists are always ready to give you comprehensive answers to them. To do this, you just need to call us at the number listed above.
