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Glossary Siemens

GlossaryAMPS (Advanced Mobile Phone Service): Developed by AT&Ts Bell Laboratories in the1970s and frst used inthe US in 19 !" The A#$S Standard has been the %oundation %or theindustry in the United States"CDMA (Code Division Multiple Access): no'n in the US as (S)9*+ a spread spe,tru- approa,h to di.italtrans-ission" /ith D#A+ ea,h ,onversation is di.iti ed and thenta..ed 'ith a ,ode" The -obile phone is then instru,ted to de,ipher

only a parti,ular ,ode to plu,2 the ri.ht ,onversation o3 the air" (t hasa 1"4*#h spread spe,tru- air inter%a,e+ uses the sa-e %re5uen,ybands as A#$S and supports A#$S operation+ e-ployin. spread)spe,tru- te,hnolo.y and a spe,ial ,odin. s,he-e" (t 'as adopted bythe Tele,o--uni,ations (ndustry Asso,iation 6T(A in 199!"DA#$S 6Di.ital A#$S 8 The se,ond .eneration o% the A#$S standard"D#A 6 re5uen,y Division #ultiple A,,ess 8 D#A is the division o% the%re5uen,y band allo,ated %or 'ireless ,ellular ,o--uni,ation into !0: ,hannels+ ea,h o% 'hi,h ,an ,arry a t'o 'ay voi,e ,onversation"D#A is the basi, te,hnolo.y used in A#$S+ the -ost 'idely installed,ellular phone syste- in ;orth A-eri,a" /ith D#A+ ea,h ,hannel ,anbe assi.ned to only one user at a ti-e"EDGE (Enhanced Data rate for GSM Evolution):

The ne

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Siemens Glossary

A satellite navi.ation syste-+ ,onsistin. o% 4? .eosyn,hronoussatellites" Used in personal tra,2in.+ navi.ation and auto-ati, vehi,lelo,ation te,hnolo.ies"GSM (Global S!ste" for Mobile co""unications): A di.ital ,ellular or $ S net'or2 used throu.hout the 'orld" Developedby TS( in urope" ;A#$S 6;arro'band A#$S 8 ;A#$S ,o-bines,ellular voi,e pro,essin. 'ith di.ital si.nalin. to in,rease the ,apa,ityand %un,tionality o% A#$S syste-s"

PCS (Personal Co""unications Services): A t'o)'ay+ 1900 #: di.ital voi,e+ -essa.in. and data servi,edesi.ned as the se,ond .eneration o% ,ellular"

#DMA (#i"e Division Multiple Access): A -ethod o% di.ital 'ireless ,o--uni,ations trans-ission allo'in. alar.e nu-ber o% users to a,,ess 6in se5uen,e a sin.le radio %re5uen,y,hannel 'ithout inter%eren,e by allo,atin. uni5ue ti-e slots to ea,huser 'ithin ea,h ,hannel$M#S ($niversal Mobile #eleco""unications S!ste"):urope s approa,h to standardi ation %or third).eneration ,ellularsyste-s+ it 'ill be based on /) D#A" U#TS 'ill o3er a 'ide ran.e o%voi,e+ data and -ulti-edia servi,es 'ith data rates %ro- 11? bps to 4#bps+ dependin. on 'hether the user is stationary or in -otion"

%&CDMA (%ideband Code Division Multiple Access): The uropean third .eneration 'ireless standard" The 'idebandrepresents the in,rease o% the %re5uen,y band to * #: + in ,o-parisonto the 1"4* #: band used in ,onventional D#A 6also 2no'n as,d-aCne "AuC (Authentication Center):

The ,o-ponent o% a =S# net'or2 that authenti,ates subs,riber and-obile e5uip-ent identities" Baseband8 The si.nalin. o% a di.ital oranalo. si.nal at its ori.inal %re5uen,ies+ i"e" not ,han.ed by-odulation"

'SC ('ase Station Controller): The ,o-ponent o% a =S# syste- that ,ontrols a .roup o% base stationsand a,ts as a node %or ,onne,tin. base stations to the -obiles'it,hin. ,enter"'SS ('ase Station Subs!ste"):

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Glossary Siemens

The ,o-bination o% BS s and base stations that to.ether provide theradio %un,tionality in a -obile syste-"Cell:

The basi, .eo.raphi, unit o% a ,ellular syste-" Also+ the basis %or the.eneri, industry ter- ,ellular " The -obile net'or2s .eo.raphi, areais divided into s-aller E,ellsF+ ea,h o% 'hi,h is e5uipped 'ith a lo')po'ered radio trans-itterGre,eiver" The ,ells ,an vary in si edependin. upon terrain and ,apa,ity de-ands" By ,ontrollin. thetrans-ission po'er+ the radio %re5uen,ies assi.ned to one ,ell ,an beli-ited to the boundaries o% that ,ell"Cell Site:

The ,entral radio trans-itterGre,eiver that -aintains ,o--uni,ations'ith -obile phones 'ithin a .ive ran.e" Also ,alled a Base Station"Diversit!:

The use o% -ultiple antennas to re,eive or trans-it the sa-e si.nal+ sothat i% one o% the antennas pi,2s up a 'ea2 si.nal+ another antennashould have a stron. si.nal"

Do nlink: The trans-ission o% radio si.nals %ro- the Base Station to the -obilehandset"

E R (E*uip"ent dentit! Re ister): The ,o-ponent o% a =S# syste- that retains in%or-ation about theidentity o% e5uip-ent su,h -obile phones" Assists net'or2 operator indis,overin. stolen -obile phones and blo,2in. the- %ro- usin. thenet'or2"+adin : A redu,tion in si.nal stren.th in a radio si.nal" adin. is usually ,ausedby reHe,ted 'aves %ro- the trans-itter havin. di3erent phases %ro-the -ain si.nal path"GMSC (Gate a! Mobile S itchin Center):

The ,o-ponent o% a =S# net'or2+ 'hi,h provides a point o%,onne,tion bet'een the =S# net'or2 and the $ST;",ando-:

The pro,ess o% trans%errin. a -obile phone ,onversation %ro- one ,ellsite to another as a user ,rosses ,ell areas durin. the ,onversation"

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Siemens Glossary

,.R (,o"e .ocation Re ister): The ,o-ponent o% a =S# net'or2 responsible %or -aintainin. the

lo,ation o% a -obile"ME ( nternational Mobile E*uip"ent dentit!):

The uni5ue serial nu-ber .iven to ea,h phone+ to help in tra,2in.stolen -obile phones"MS ( nternational Mobile Subscriber dentit!): A uni5ue nu-ber used in =S# syste-s to identi%y individualsubs,ribers"MA,/ (Mobile Assisted ,ando-): Si-ilar to a basi, hando3+ e

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Siemens Glossary

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