utra fdma tdma 3gpp2 cdma2000 3gpp transceivers mimo cdmaone wimax nmt tdd omnidirectional 1xev umts paging cdma amps dect hsupa transceiver lte 802.16 gsm hspa artech imt scdma pagers downlink
determine and explain each of the different types of networks
Cellular network - wikipedia Cellular network Jump to : navigation , search For history of mobile phones , including the history of cellular networks , see History of mobile phones . Top of a cellular radio tower Part of a series on Antennas Common types ( show ) Dipole Fractal Loop Monopole Satellite dish Television Whip Components ( show ) Balun Block upconverter Coaxial cable Counterpoise ( ground system ) Feed Feed line Low - noise block downconverter Passive radiator Receiver Rotator Stub Transmitter Tuner Twin - lead Systems ( hide ) Antenna farm Amateur radio Cellular network Hotspot Municipal wireless network Radio Radio masts and towers Wi - Fi Wireless Safety and regulation ( show ) Mobile phone radiation and health Wireless electronic devices and health International Telecommunication Union ( Radio Regulations ) World Radiocommunication Conference Radiation sources / regions ( show ) Boresight Focal cloud Ground plane Main lobe Near and far field Side lobe Vertical plane Characteristics ( show ) Array gain Directivity Efficiency Electrical length Equivalent radius Factor Friis transmission equation Gain Height Radiation pattern Radiation resistance Radio propagation Radio spectrum Signal - to - noise ratio Spurious emission Techniques ( show ) Beam steering Beam tilt Beamforming Bell Laboratories Layered Space - Time ( BLAST ) Multiple - input multiple - output ( MIMO ) Reconfiguration Spread spectrum Wideband Space Division Multiple Access ( WSDMA ) A cellular network or mobile network is a communication network where the last link is wireless . The network is distributed over land areas called cells , each served by at least one fixed - location transceiver , but more normally three cell sites or base transceiver stations . These base stations provide the cell with the network coverage which can be used for transmission of voice , data and others . A cell typically uses a different set of frequencies from neighboring cells , to avoid interference and provide guaranteed service quality within each cell . When joined together these cells provide radio coverage over a wide geographic area . This enables a large number of portable transceivers ( e.g. , mobile phones , tablets and laptops equipped with mobile broadband modems , pagers , etc . ) to communicate with each other and with fixed transceivers and telephones anywhere in the network , via base stations , even if some of the transceivers are moving through more than one cell during transmission . Cellular networks offer a number of desirable features : More capacity than a single large transmitter , since the same frequency can be used for multiple links as long as they are in different cells Mobile devices use less power than with a single transmitter or satellite since the cell towers are closer Larger coverage area than a single terrestrial transmitter , since additional cell towers can be added indefinitely and are not limited by the horizon Major telecommunications providers have deployed voice and data cellular networks over most of the inhabited land area of the Earth . This allows mobile phones and mobile computing devices to be connected to the public switched telephone network and public Internet . Private cellular networks can be used for research or for large organizations and fleets , such as dispatch for local public safety agencies or a taxicab company . Contents ( hide ) 1 Concept 2 Cell signal encoding 3 Frequency reuse 4 Directional antennas 5 Broadcast messages and paging 6 Movement from cell to cell and handing over 7 Mobile phone network 7.1 Structure of the mobile phone cellular network 7.2 Small cells 7.3 Cellular handover in mobile phone networks 7.4 Cellular frequency choice in mobile phone networks 7.5 Coverage comparison of different frequencies 8 See also 9 References 10 External links 11 Further reading Concept ( edit ) Example of frequency reuse factor or pattern 1 / 4 In a cellular radio system , a land area to be supplied with radio service is divided into cells , in a pattern which depends on terrain and reception characteristics but which can consist of roughly hexagonal , square , circular or some other regular shapes , although hexagonal cells are conventional . Each of these cells is assigned with multiple frequencies ( f -- f ) which have corresponding radio base stations . The group of frequencies can be reused in other cells , provided that the same frequencies are not reused in adjacent neighboring cells as that would cause co-channel interference . The increased capacity in a cellular network , compared with a network with a single transmitter , comes from the mobile communication switching system developed by Amos Joel of Bell Labs that permitted multiple callers in the same area to use the same frequency by switching calls made using the same frequency to the nearest available cellular tower having that frequency available and from the fact that the same radio frequency can be reused in a different area for a completely different transmission . If there is a single plain transmitter , only one transmission can be used on any given frequency . Unfortunately , there is inevitably some level of interference from the signal from the other cells which use the same frequency . This means that , in a standard FDMA system , there must be at least a one cell gap between cells which reuse the same frequency . In the simple case of the taxi company , each radio had a manually operated channel selector knob to tune to different frequencies . As the drivers moved around , they would change from channel to channel . The drivers knew which frequency covered approximately what area . When they did not receive a signal from the transmitter , they would try other channels until they found one that worked . The taxi drivers would only speak one at a time , when invited by the base station operator . This is , in a sense , time - division multiple access ( TDMA ) . The first commercially automated cellular network , the 1G generation , was launched in Japan by Nippon Telegraph and Telephone ( NTT ) in 1979 , initially in the metropolitan area of Tokyo . Within five years , the NTT network had been expanded to cover the whole population of Japan and became the first nationwide 1G network . Cell signal encoding ( edit ) To distinguish signals from several different transmitters , time - division multiple access ( TDMA ) , frequency - division multiple access ( FDMA ) , code - division multiple access ( CDMA ) , and orthogonal frequency - division multiple access ( OFDMA ) were developed . With TDMA , the transmitting and receiving time slots used by different users in each cell are different from each other . With FDMA , the transmitting and receiving frequencies used by different users in each cell are different from each other . In a simple taxi system , the taxi driver manually tuned to a frequency of a chosen cell to obtain a strong signal and to avoid interference from signals from other cells . The principle of CDMA is more complex , but achieves the same result ; the distributed transceivers can select one cell and listen to it . Other available methods of multiplexing such as polarization - division multiple access ( PDMA ) can not be used to separate signals from one cell to the next since the effects of both vary with position and this would make signal separation practically impossible . TDMA is used in combination with either FDMA or CDMA in a number of systems to give multiple channels within the coverage area of a single cell . Frequency reuse ( edit ) The key characteristic of a cellular network is the ability to re-use frequencies to increase both coverage and capacity . As described above , adjacent cells must use different frequencies , however there is no problem with two cells sufficiently far apart operating on the same frequency , provided the masts and cellular network users ' equipment do not transmit with too much power . The elements that determine frequency reuse are the reuse distance and the reuse factor . The reuse distance , D is calculated as D = R 3 N ( \ displaystyle D = R ( \ sqrt ( 3N ) ) ) , where R is the cell radius and N is the number of cells per cluster . Cells may vary in radius from 1 to 30 kilometres ( 0.62 to 18.64 mi ) . The boundaries of the cells can also overlap between adjacent cells and large cells can be divided into smaller cells . The frequency reuse factor is the rate at which the same frequency can be used in the network . It is 1 / K ( or K according to some books ) where K is the number of cells which can not use the same frequencies for transmission . Common values for the frequency reuse factor are 1 / 3 , 1 / 4 , 1 / 7 , 1 / 9 and 1 / 12 ( or 3 , 4 , 7 , 9 and 12 depending on notation ) . In case of N sector antennas on the same base station site , each with different direction , the base station site can serve N different sectors . N is typically 3 . A reuse pattern of N / K denotes a further division in frequency among N sector antennas per site . Some current and historical reuse patterns are 3 / 7 ( North American AMPS ) , 6 / 4 ( Motorola NAMPS ) , and 3 / 4 ( GSM ) . If the total available bandwidth is B , each cell can only use a number of frequency channels corresponding to a bandwidth of B / K , and each sector can use a bandwidth of B / NK . Code division multiple access - based systems use a wider frequency band to achieve the same rate of transmission as FDMA , but this is compensated for by the ability to use a frequency reuse factor of 1 , for example using a reuse pattern of 1 / 1 . In other words , adjacent base station sites use the same frequencies , and the different base stations and users are separated by codes rather than frequencies . While N is shown as 1 in this example , that does not mean the CDMA cell has only one sector , but rather that the entire cell bandwidth is also available to each sector individually . Depending on the size of the city , a taxi system may not have any frequency - reuse in its own city , but certainly in other nearby cities , the same frequency can be used . In a large city , on the other hand , frequency - reuse could certainly be in use . Recently also orthogonal frequency - division multiple access based systems such as LTE are being deployed with a frequency reuse of 1 . Since such systems do not spread the signal across the frequency band , inter-cell radio resource management is important to coordinate resource allocation between different cell sites and to limit the inter-cell interference . There are various means of Inter-Cell Interference Coordination ( ICIC ) already defined in the standard . Coordinated scheduling , multi-site MIMO or multi-site beam forming are other examples for inter-cell radio resource management that might be standardized in the future . Directional antennas ( edit ) Cellular telephone frequency reuse pattern . See U.S. Patent 4,144,411 Cell towers frequently use a directional signal to improve reception in higher - traffic areas . In the United States , the FCC limits omnidirectional cell tower signals to 100 watts of power . If the tower has directional antennas , the FCC allows the cell operator to broadcast up to 500 watts of effective radiated power ( ERP ) . Although the original cell towers created an even , omnidirectional signal , were at the centers of the cells and were omnidirectional , a cellular map can be redrawn with the cellular telephone towers located at the corners of the hexagons where three cells converge . Each tower has three sets of directional antennas aimed in three different directions with 120 degrees for each cell ( totaling 360 degrees ) and receiving / transmitting into three different cells at different frequencies . This provides a minimum of three channels , and three towers for each cell and greatly increases the chances of receiving a usable signal from at least one direction . The numbers in the illustration are channel numbers , which repeat every 3 cells . Large cells can be subdivided into smaller cells for high volume areas . Cell phone companies also use this directional signal to improve reception along highways and inside buildings like stadiums and arenas . Broadcast messages and paging ( edit ) Practically every cellular system has some kind of broadcast mechanism . This can be used directly for distributing information to multiple mobiles . Commonly , for example in mobile telephony systems , the most important use of broadcast information is to set up channels for one - to - one communication between the mobile transceiver and the base station . This is called paging . The three different paging procedures generally adopted are sequential , parallel and selective paging . The details of the process of paging vary somewhat from network to network , but normally we know a limited number of cells where the phone is located ( this group of cells is called a Location Area in the GSM or UMTS system , or Routing Area if a data packet session is involved ; in LTE , cells are grouped into Tracking Areas ) . Paging takes place by sending the broadcast message to all of those cells . Paging messages can be used for information transfer . This happens in pagers , in CDMA systems for sending SMS messages , and in the UMTS system where it allows for low downlink latency in packet - based connections . Movement from cell to cell and handing over ( edit ) In a primitive taxi system , when the taxi moved away from a first tower and closer to a second tower , the taxi driver manually switched from one frequency to another as needed . If a communication was interrupted due to a loss of a signal , the taxi driver asked the base station operator to repeat the message on a different frequency . In a cellular system , as the distributed mobile transceivers move from cell to cell during an ongoing continuous communication , switching from one cell frequency to a different cell frequency is done electronically without interruption and without a base station operator or manual switching . This is called the handover or handoff . Typically , a new channel is automatically selected for the mobile unit on the new base station which will serve it . The mobile unit then automatically switches from the current channel to the new channel and communication continues . The exact details of the mobile system 's move from one base station to the other varies considerably from system to system ( see the example below for how a mobile phone network manages handover ) . Mobile phone network ( edit ) GSM network architecture The most common example of a cellular network is a mobile phone ( cell phone ) network . A mobile phone is a portable telephone which receives or makes calls through a cell site ( base station ) , or transmitting tower . Radio waves are used to transfer signals to and from the cell phone . Modern mobile phone networks use cells because radio frequencies are a limited , shared resource . Cell - sites and handsets change frequency under computer control and use low power transmitters so that the usually limited number of radio frequencies can be simultaneously used by many callers with less interference . A cellular network is used by the mobile phone operator to achieve both coverage and capacity for their subscribers . Large geographic areas are split into smaller cells to avoid line - of - sight signal loss and to support a large number of active phones in that area . All of the cell sites are connected to telephone exchanges ( or switches ) , which in turn connect to the public telephone network . In cities , each cell site may have a range of up to approximately ⁄ mile ( 0.80 km ) , while in rural areas , the range could be as much as 5 miles ( 8.0 km ) . It is possible that in clear open areas , a user may receive signals from a cell site 25 miles ( 40 km ) away . Since almost all mobile phones use cellular technology , including GSM , CDMA , and AMPS ( analog ) , the term `` cell phone '' is in some regions , notably the US , used interchangeably with `` mobile phone '' . However , satellite phones are mobile phones that do not communicate directly with a ground - based cellular tower , but may do so indirectly by way of a satellite . There are a number of different digital cellular technologies , including : Global System for Mobile Communications ( GSM ) , General Packet Radio Service ( GPRS ) , cdmaOne , CDMA2000 , Evolution - Data Optimized ( EV - DO ) , Enhanced Data Rates for GSM Evolution ( EDGE ) , Universal Mobile Telecommunications System ( UMTS ) , Digital Enhanced Cordless Telecommunications ( DECT ) , Digital AMPS ( IS - 136 / TDMA ) , and Integrated Digital Enhanced Network ( iDEN ) . The transition from existing analog to the digital standard followed a very different path in Europe and the US . As a consequence , multiple digital standards surfaced in the US , while Europe and many countries converged towards the GSM standard . Structure of the mobile phone cellular network ( edit ) A simple view of the cellular mobile - radio network consists of the following : A network of radio base stations forming the base station subsystem . The core circuit switched network for handling voice calls and text A packet switched network for handling mobile data The public switched telephone network to connect subscribers to the wider telephony network This network is the foundation of the GSM system network . There are many functions that are performed by this network in order to make sure customers get the desired service including mobility management , registration , call set - up , and handover . Any phone connects to the network via an RBS ( Radio Base Station ) at a corner of the corresponding cell which in turn connects to the Mobile switching center ( MSC ) . The MSC provides a connection to the public switched telephone network ( PSTN ) . The link from a phone to the RBS is called an uplink while the other way is termed downlink . Radio channels effectively use the transmission medium through the use of the following multiplexing and access schemes : frequency division multiple access ( FDMA ) , time division multiple access ( TDMA ) , code division multiple access ( CDMA ) , and space division multiple access ( SDMA ) . Small cells ( edit ) Main article : Small cell Small cells , which have a smaller coverage area than base stations , are categorised as follows : Microcell , less than 2 kilometres Picocell , less than 200 metres Femtocell , around 10 metres Cellular handover in mobile phone networks ( edit ) Main article : Handover As the phone user moves from one cell area to another cell while a call is in progress , the mobile station will search for a new channel to attach to in order not to drop the call . Once a new channel is found , the network will command the mobile unit to switch to the new channel and at the same time switch the call onto the new channel . With CDMA , multiple CDMA handsets share a specific radio channel . The signals are separated by using a pseudonoise code ( PN code ) specific to each phone . As the user moves from one cell to another , the handset sets up radio links with multiple cell sites ( or sectors of the same site ) simultaneously . This is known as `` soft handoff '' because , unlike with traditional cellular technology , there is no one defined point where the phone switches to the new cell . In IS - 95 inter-frequency handovers and older analog systems such as NMT it will typically be impossible to test the target channel directly while communicating . In this case other techniques have to be used such as pilot beacons in IS - 95 . This means that there is almost always a brief break in the communication while searching for the new channel followed by the risk of an unexpected return to the old channel . If there is no ongoing communication or the communication can be interrupted , it is possible for the mobile unit to spontaneously move from one cell to another and then notify the base station with the strongest signal . Cellular frequency choice in mobile phone networks ( edit ) Main article : Cellular frequencies The effect of frequency on cell coverage means that different frequencies serve better for different uses . Low frequencies , such as 450 MHz NMT , serve very well for countryside coverage . GSM 900 ( 900 MHz ) is a suitable solution for light urban coverage . GSM 1800 ( 1.8 GHz ) starts to be limited by structural walls . UMTS , at 2.1 GHz is quite similar in coverage to GSM 1800 . Higher frequencies are a disadvantage when it comes to coverage , but it is a decided advantage when it comes to capacity . Pico cells , covering e.g. one floor of a building , become possible , and the same frequency can be used for cells which are practically neighbours . Cell service area may also vary due to interference from transmitting systems , both within and around that cell . This is true especially in CDMA based systems . The receiver requires a certain signal - to - noise ratio , and the transmitter should not send with too high transmission power in view to not cause interference with other transmitters . As the receiver moves away from the transmitter , the power received decreases , so the power control algorithm of the transmitter increases the power it transmits to restore the level of received power . As the interference ( noise ) rises above the received power from the transmitter , and the power of the transmitter can not be increased any more , the signal becomes corrupted and eventually unusable . In CDMA - based systems , the effect of interference from other mobile transmitters in the same cell on coverage area is very marked and has a special name , cell breathing . One can see examples of cell coverage by studying some of the coverage maps provided by real operators on their web sites or by looking at independently crowdsourced maps such as OpenSignal . In certain cases they may mark the site of the transmitter , in others it can be calculated by working out the point of strongest coverage . A cellular repeater is used to extend cell coverage into larger areas . They range from wideband repeaters for consumer use in homes and offices to smart or digital repeaters for industrial needs . Coverage comparison of different frequencies ( edit ) The following table shows the dependency of the coverage area of one cell on the frequency of a CDMA2000 network : Frequency ( MHz ) Cell radius ( km ) Cell area ( km ) Relative Cell Count 450 48.9 7521 950 26.9 2269 3.3 1800 14.0 618 12.2 2100 12.0 449 16.2 See also ( edit ) Lists and technical information : Technology : GSM , IS - 95 , UMTS , CDMA2000 , LTE Cellular frequencies GSM frequency bands UMTS frequency bands LTE frequency bands Deployed networks by technology List of UMTS networks List of HSDPA networks List of HSUPA networks List of HSPA+ networks List of TD - SCDMA networks List of CDMA2000 networks List of LTE networks List of deployed WiMAX networks Deployed networks by country ( including technology and frequencies ) List of mobile network operators of Europe List of mobile network operators of the Americas List of mobile network operators of the Asia Pacific region List of mobile network operators of the Middle East and Africa List of mobile network operators ( summary ) Mobile country code - code , frequency , and technology for each operator in each country Comparison of mobile phone standards Equipment : Cellular repeater Cellular router Professional mobile radio ( PMR ) OpenBTS Other : Cellular traffic MIMO ( multiple - input and multiple - output ) Mobile edge computing Mobile phone radiation and health Network simulation Radio resource management ( RRM ) Routing in cellular networks Signal strength Title 47 of the Code of Federal Regulations References ( edit ) ^ Jump up to : Guowang Miao ; Jens Zander ; Ki Won Sung ; Ben Slimane ( 2016 ) . Fundamentals of Mobile Data Networks . Cambridge University Press . ISBN 1107143217 . Jump up ^ Tom Simonite January 24 , 2013 ( 2013 - 01 - 24 ) . `` Google 's Private Cell Phone Network Could Be a Threat to Cellular Carriers MIT Technology Review '' . Technologyreview.com . Retrieved 2013 - 11 - 23 . Jump up ^ `` Be Mobile , Stay Connected PMN '' . Privatemobilenetworks.com . Retrieved 2013 - 11 - 23 . Jump up ^ U.S. Patent 3,663,762 , issued May 16 , 1972 . Jump up ^ J.E. Flood . Telecommunication Networks . Institution of Electrical Engineers , London , UK , 1997 . chapter 12 . Jump up ^ `` Phone Networks '' . The Reverse Phone . 8 June 2011 . Retrieved 2 April 2012 . Jump up ^ Pauli , Volker ; Naranjo , Juan Diego ; Seidel , Eiko ( December 2010 ) . `` Heterogeneous LTE Networks and Inter-Cell Interference Coordination '' ( PDF ) . Nomor Research . Retrieved 2 April 2012 . ^ Jump up to : Drucker , Elliott , The Myth of Cellular Tower Health Hazards , retrieved 2013 - 11 - 19 Jump up ^ `` Cellular Telephone Basics '' . Privateline.com. 1 January 2006 . p. 2 . Archived from the original on 17 April 2012 . Retrieved 2 April 2012 . Jump up ^ U.S. Patent 4,144,411 -- Cellular Radiotelephone System for Different Cell Sizes -- Richard H. Frenkiel ( Bell Labs ) , filed Sep 22 , 1976 , issued March 13 , 1979 Jump up ^ Paetsch , Michael ( 1993 ) : The evolution of mobile communications in the US and Europe . Regulation , technology , and markets . Boston , London : Artech House ( The Artech House mobile communications library ) . Jump up ^ page 17 External links ( edit ) Raciti , Robert C. ( July 1995 ) . `` CELLULAR TECHNOLOGY '' . Nova Southeastern University . Retrieved 2 April 2012 . Mobile network optimization Further reading ( edit ) P. Key , D. Smith . Teletraffic Engineering in a competitive world . Elsevier Science B.V. , Amsterdam Netherlands , 1999 . Chapter 1 ( Plenary ) and 3 ( mobile ) . William C.Y. Lee , Mobile Cellular Telecommunications Systems ( 1989 ) , McGraw - Hill . <Th_colspan="2"> ( hide ) Cellular network standards <Td_colspan="2"> List of mobile phone generations 0G ( radio telephones ) MTS MTA - MTB - MTC - MTD IMTS AMTS OLT Autoradiopuhelin B - Netz Altai AMR 1G ( 1985 ) AMPS family AMPS ( TIA / EIA / IS - 3 , ANSI / TIA / EIA - 553 ) N - AMPS ( TIA / EIA / IS - 91 ) TACS ETACS Other NMT C - 450 Hicap Mobitex DataTAC 2G ( 1992 ) GSM / 3GPP family GSM CSD HSCSD 3GPP2 family cdmaOne ( TIA / EIA / IS - 95 and ANSI - J - STD 008 ) AMPS family D - AMPS ( IS - 54 and IS - 136 ) Other CDPD iDEN PDC PHS 2G transitional ( 2.5 G , 2.75 G ) GSM / 3GPP family GPRS EDGE / EGPRS ( UWC - 136 / 136HS / TDMA - EDGE ) 3GPP2 family CDMA2000 1X ( TIA / EIA / IS - 2000 ) CDMA2000 1X Advanced Other WiDEN DECT 3G ( 2003 ) 3GPP family UMTS UTRA - FDD / W - CDMA UTRA - TDD LCR / TD - SCDMA UTRA - TDD HCR / TD - CDMA 3GPP2 family CDMA2000 1xEV - DO Release 0 ( TIA / IS - 856 ) 3G transitional ( 3.5 G , 3.75 G , 3.9 G ) 3GPP family HSPA HSDPA HSUPA HSPA+ LTE ( E-UTRA ) 3GPP2 family CDMA2000 1xEV - DO Revision A ( TIA / EIA / IS - 856 - A ) EV - DO Revision B ( TIA / EIA / IS - 856 - B ) EV - DO Revision C IEEE family Mobile WiMAX IEEE 802.16 e Flash - OFDM iBurst IEEE 802.20 4G ( 2013 ) ( IMT Advanced ) 3GPP family LTE Advanced ( E-UTRA ) LTE Advanced Pro ( 4.5 G Pro / pre-5G / 4.9 G ) IEEE family WiMAX ( IEEE 802.16 m ) WiMax 2.1 ( LTE - TDD ) 5G ( 2020 ) ( IMT - 2020 ) ( Under development ) LTE 5G - NR Related articles Cellular networks Mobile telephony History List of standards Comparison of standards Channel access methods Spectral efficiency comparison table Cellular frequencies ( Bands : GSM UMTS LTE ) Mobile broadband NGMN Alliance MIMO VoLTE <Th_colspan="2"> Telecommunications History Beacon Broadcasting Cable protection system Cable TV Communications satellite Computer network Drums Electrical telegraph Fax Heliographs Hydraulic telegraph Internet Mass media Mobile phone Optical telecommunication Optical telegraphy Pager Photophone Prepaid mobile phone Radio Radiotelephone Satellite communications Semaphore Smartphone Smoke signals Telecommunications history Telautograph Telegraphy Teleprinter ( teletype ) Telephone The Telephone Cases Television Timeline of communication technology Undersea telegraph line Videoconferencing Videophone Videotelephony Whistled language Pioneers Edwin Howard Armstrong John Logie Baird Paul Baran Alexander Graham Bell Tim Berners - Lee Jagadish Chandra Bose Vint Cerf Claude Chappe Donald Davies Lee de Forest Philo Farnsworth Reginald Fessenden Elisha Gray Erna Schneider Hoover Charles K. Kao Hedy Lamarr Innocenzo Manzetti Guglielmo Marconi Antonio Meucci Radia Perlman Alexander Stepanovich Popov Johann Philipp Reis Nikola Tesla Camille Tissot Alfred Vail Charles Wheatstone Vladimir K. Zworykin Transmission media Characteristic impedance Coaxial cable Electromagnetic radiation Electrical cable Free - space optical communication Heaviside condition Loading coil Molecular communication Optical fiber Telegrapher 's equations Network topology and switching Links Nodes Terminal node Network switching ( circuit packet ) Telephone exchange Multiplexing Space - division Frequency - division Time - division Polarization - division Orbital angular - momentum Code - division Networks ARPANET BITNET Cellular network Computer CYCLADES Ethernet FidoNet Internet ISDN LAN Mobile NGN NPL network Public Switched Telephone Radio Telecommunications equipment Television Telex WAN Wireless World Wide Web <Td_colspan="2"> Portal Retrieved from `` https://en.wikipedia.org/w/index.php?title=Cellular_network&oldid=801301232 '' Categories : Mobile telecommunications Radio resource management Telecommunications infrastructure Japanese inventions Talk Contents About Wikipedia Беларуская Беларуская ( тарашкевіца ) ‎ Български Čeština Deutsch Ελληνικά Español Esperanto فارسی Français 한국어 IsiZulu Íslenska Italiano עברית ಕನ್ನಡ ქართული Қазақша Lietuvių मराठी მარგალური 日本 語 Norsk Polski Português Русский Slovenčina Suomi Татарча / tatarça Türkçe Українська Tiếng Việt 粵語 中文 Edit links This page was last edited on 18 September 2017 , at 21 : 47 . 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