Jumat, 01 November 2013

Sort the development of wireless communications

Wireless communications terminology ( region ) Radio onasendaja terminology. First is the use of radio kuikommunikatsioonivahend rarely and is widely regarded as the "backbone " network of contacts "backhaul." With the development of electronic communications , the use of radio frequencies for communication varies from person to person (inter- communication ) to give. With the development , the use of spectrum rotation l ' of light in the infrared part of the spectrum obtained (IR) power Kasutamineväiksem ( low power radio - ) . radius of terminology would be irrelevant and continue to wireless communication systems.
     Looking back at the center of development, some body or authority ( independent and non -profit ) , that is moving forward - T, move forward - R, IEEE, however , IETF, IEICE, and others, began their terms of system to ensure transparency, or order a hard life before children use the energy produced ( for sale) .
     Home integer throughput performance at a glance. It was originally developed for wireless communications and research, before they came to Soldier of commercial space . Determining the evolution of development, wireless communication is classified as a wireless WAN ( wireless ) service, which is very appropriate transmission of sound ( audio streaming ) and support user mobility (mobility of users). This type of cellular networks , also known as a public line network mobile network (PLMN), for example , onvõrk NMT , GSM, UMTS.     There are other types of wireless communication , wireless LAN (Local Area Network), which is the main shuttle karakateristik onandmete is static and only supports portable user. This is an example of an Ethernet network platform Fidelity (Wi-Fi).Taxinómisi tis anáptyxis ton asýrmaton epikoinoniónAsýrmates epikoinoníes orología (periféreia) Radio onasendaja orología. Próti eínai i chrísi tou radiofónou kuikommunikatsioonivahend spánia kai theoreítai evréos os i «rachokokaliá» tou diktýou ton epafón "backhaul." Me tin anáptyxi ton ilektronikón epikoinonión, i chrísi ton radiosychnotíton gia tin epikoinonía poikíllei apó átomo se átomo (inter-epikoinonía) gia na dósei. Me tin anáptyxi, ti chrísi tou fásmatos peristrofís l 'tou fotós sto ypérythro tmíma tou fásmatos elífthi (IR) ischýos Kasutamineväiksem (chamilí radiófono dýnami pou -). aktína tis orologías tha ítan ánef simasías kai na synechísei na asýrmata systímata epikoinonión.
     Koitázontas píso sto kéntro tis anáptyxis, kápoio sóma í archí (anexártito kai mi kerdoskopikoú charaktíra), diladí kínisi pros ta emprós - T, kínisi pros ta emprós - R, IEEE, ómos, IETF, IEICE, kai álloi, árchisan tous órous tou systímatos gia na exasfalisteí i diafáneia, í na parangeílete mia sklirí ​​zoí prin apó ta paidiá chrisimopoioún tin enérgeia pou parágetai (pros pólisi).
     Archikí apódosi se akéraio arithmó me mia matiá. Ítan archiká anaptýchthike gia asýrmates epikoinoníes kai tin érevna, prin írthan se Soldier tou emporikoú chórou. O prosdiorismós tis exélixis tis anáptyxis, asýrmatis epikoinonías taxinomeítai os asýrmato WAN (asýrmatou diktýou) ypiresía, i opoía eínai polý sostó metádosi tou íchou (metádosi íchou) kai ypostírixi gia tin kinitikótita ton christón (kinitikótita ton christón). Aftó to eídos ton kypseloeidón diktýon, gnostó kai os dimósio díktyo kinitís grammís diktýou (PLMN), gia parádeigma, onvõrk NMT, GSM, UMTS.     Ypárchoun kai álla eídi asýrmatis epikoinonías, asýrmato topikó díktyo (Local Area Network), to opoío eínai i kýria ypiresía metaforás karakateristik onandmete eínai statikí kai ypostirízei móno forités chrísti. Aftó eínai éna parádeigma tou diktýou Ethernet platfórma Fidelity (Wi-Fi).


PLMN / cellular network has the advantage of coverage and is able to move a lot of power . On the other hand , oleasjad LAN, but the benefit of getting the speed, efficiency and capacity of the data. Another difference , which is based on trade data , storage conditions of the network " cycle - Swap". 'Arrangement Pack " Commercial availability of the public network (right) increase the use of Procedures - This circuit , while private network ( data service ) information about the selected file from the Internet Protocol (IP). Tegutsebkanalkommutatsiooniga operation of mobile communications operator , where access to the main channel of communication requires a ratio vigil . töötavadLAN When the packet data / information andmepaketidvõrgustik drop in form, without the need to consider the availability of relationships that exist between the two end-users and channel construction .
     On the development of technologies for web development , the development of mobile networks. Currently , the market , and width - On3. generation or 3G. Circulation is limited to the provision of telephone services to wireless telecommunications faster, to more detailed resources and abundant, as is often kättesaadavussagedusala customer. Although it is the responsibility of the spectrum is very little reason - the inner circle would be irrelevant. Improving the ability to vary the frequency and spectrum multiplexing and multiple access (CDMA, OFDM / OFDMA) is excellent as rakendatakseahelkommuteeritud operation , the use of wireless technology standard package of many organizations that use Internet Protocol technology berbasi (IP) fourth-generation wireless (4G).
     The wireless technology started enne4G can now get? Depending on the number of wireless access technologies (Radio Access Technology - mice ) Sort generation 2G launch wireless communication is defined in practice. In this way , even the original 2G and 4G deliver results0g definition of scope ( not apartment the previous generation) .
     The progress from generation to generation , even a "driver" for the construction of a semiconductor integrated circuit and micro / nano electronics, but not as fast as the Law of Moore, was founded , and the Philistines . 10-15 years to get away from your production . When introduced in 1985, 2G, 3G, 2000, this time is likely to be applied to 4G 2010
     Until the announcement defined in the International Telecommunications Union ( move forward) services such as voice , data and Internet. Mauris same (trip wired): "voice" in almost every one of them, is a question that power and the average speed is higher. any functionmedium itself .
     However , unlike the government, where the air is to the shape and size of the Mean ( wild) . Apart from physical and environmental factors also significantly affected . Seegaside polarized wireless Internet service in the beginning, that the network is the voice of the Lord , and send data to the network backbone.
     Network problems the lake is interrupted by the nature of the " easy " is not like the others , " between the two phases, " or "double full ." Recently the transmission grid digital fastest growing digitization of broadband video broadcast (DVB), and there are many species, especially satellite communications (S - DVB and DVB - S2), dried (DVB - T) (DVB - The ) , and so on. Even with DVB technology is also in the field of wired and wireless services for others.
     Dominate the Internet instead of voice communications
public / public and public Internet agosystem property , such as land status network (PLMN), as stated. In this system , each user is connected to a radio repeater , which is fixed ( or base station transmitter ) . Considering the scope of the number of users dilayanai base transmitter is limited , it is said that the phone does not need a laptop . This is known as a wireless local loop (WLL), Wireless near ngetrend fixed concept has not changed , but the technology has become .
     Despite advances in technology , the number of disease -based measure also increases, so that the user mobility etsuurem .. The user can switch from one to another down the transmitter based liikudasaatja. This is known as wandering around , because most of them do not appear in the body of the cycle. Now, this is what is known in the network of mobile phones (cell)

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