გვისმენენ და იწერენ თუ არა GSM-ში?

tikusha

ნუ დაგავიწყდება ძვირფასო, რომ ამქვეყნად ქალი ყველაზე დიდი და ამოუხსნელი საიდუმლოა.....

aka
აუ ეგეთები არ გვინდა ახლა, თორემ შორს წავალთ თემას ხომ აშკარად გადავუხვევთ

Taaaaaaaaksssssssssssssssssss davicyet......
jer ganvixilot GSM operatoris struqtura:
sistema uxeshad shegvidzlia davyot or nacilad :SSS da RSS (Switching Sub System da Radio Sub System). SSS es Sadguria (Siemens SSS D900/1800 magtis shemtxvevashi da Ericsson geoselshi, magram mgoni GeoCell ma sadguri gamocvala, daitanjnen sacylebi ericssontan gadacharbebuli intimit :-))))), RSS ki shedgeba BSC (Base Station Controller), BTS (Base Transmitting Station, GeoCellis Ericssonis terminologiit es ukanaskneli RBS is saxelit moixsenieba Radio Base Station) da yvelafer amis shemaertebel SSS-BSC-BTS MicroWave and FO linkebisagan anu sareleo systema.
Switch i ushualod ukavshirdeba BSC, xolo BSC ze ushualodaa chamokidebuli BTS ebi . BTS sheidzleba iyos rogorc Omni (antenis tipis mixedvit Omnidirectional, andzis garshemo criuli gadafarvis misagebad) aseve sectorialuri 1dan 3 seqtoramde (seqtoris sxivis gashlis kutxe 120 gradusis farglebshia da 3 seqtorit aseve criuli mtliani gadafarva miigeba BTS is garshemo), Omnit da 3 seqtorianebit migebuli "sruli dafarvis" principuli gansxvaveba calke temaaa da ar girs axla amaze, isedac bevris kakuni micevs klavaze :-))))
Switchis systemuri blokebi shedgeba CCG (Central Clock Generator), BAP CAP procesorebisa, LTG (Line Trunk Group) LTU (Line Trunk Unit) da sxva mravali..... tavad LTG arsebobs sxvadasxva klasis LTG-A, B,C, D, G, M .....scored es moduli (shesabamisiklasis) aris gankutvnili sadguris BSC stan da sxva sadgurebtan misaerteblad mat shoris satelitur sacommunicatio linkebtan, gansxvavdebian shesadzlo signalizaciis uzrunvelyofis tipebit (R2 CAS SS7 ISDN....), funkcionalurad da Echo Cancellation Suppression algoritmebit).
Ganvixilot pirveli "Dirka" : LTG BSC monakvetze sakmarisia normaluri (Agilentis and romelime magis klasis) analizatorit chaerto, rom 2Mbps arxshi 30 arxidan nebismiers gamavali SS7 is miuxedavad usmen, ogond am shemtxvevashi ar gaqvs sashualeba gamiznuli (sachiro nomris) mosmena acarmoo. Rac sheexeba LTG ebis da shesabamisad 2Mbps arxebis raodenobas, sulac araa sachiro 150000 abonentze imdenive iyos, sashualo statistikuri gatvlebit dazhe xazis abonentebze (chveulebrivi ATS ebisatvis) araumetes 1/3 saa anu 150000 abonents 5000-6000 arxi tavs gadasdis da tu gavitvaliscinebt imasac, rom erti 2Mbps arxi 30 sasaubro arxs atarebs da 1 LTG 4 2Mbps arxi aqvs, sul ragac 50 LTG sakmarisia. ase rom arc tu ise bevria sachiro yvela shesadzlo saubris chasacerad, mitumetes tuki mtel am informacias cotati daxvecili aparaturit pirdapir cifrul formatshive chavicert (ormagi convertaciis asacileblad), arc tu iseti fantastikuri ramaa.
Rac sheexeba coordinatebis dadgenis problemas, kargad ganvitarebul qselshi ufro zustad sheidzleba amis dadgena: sadguris VLR (Visitors Location Register) inaxavs informacias nebismier qselshi chartul IMSI ze (SIM baratie eleqtronuli nomeri International Mobile Subscriber ID), gamortvis an qselidan gavardnis shemtxvevashi (tuki didi xania gasuli) 13 saatis mandzilze kidev inaxavs bolo koordinatebs BTS is Cell ID s doneze, anu seqtoris sizustit, amas davumatot GSM is algoritmi, romlitac mobiluri yoveltvis ufro dzlieri signalis anu (uxeshad rom vtqvat) uaxloesi seqtoris gavlit mushaobs, pelengacia savsebit advili xdeba, or mimdebare andzas shoris (anu gadamkvet seqtorebs shoris ufro scorad) is imyofeba mandzilis naxevarze naklebi radiusit da seqtoris gashlis mimartulebit, midi da eszebe, rac ufro kargadaa GSM qseli im raionshi ganvitarebuli, anu rac ufro axlo-axlosaa sadgurebi, mit ufro zustad xerxdeba pelengacia :-)))
Meore "legaluri Dirka": arsebobs sadgurebisatvis egret codebuli iurdiuli chartvis moduli, mocyobiloba, romelic sadgurshi specialur LTGs uertdeba da "konferenciis magvari" metodit axdens kontrols..... misi martva sadguris brdzanebebit xorcieldeba da sakmarisia romelime IMSI "aiyvanot agricxvaze" rom misi yoveli amosutqva fiqsirdeba: koordinatebi (Cell ID), chveulebriv rezhimshi gadasvlebi Cell-Cell, saubrisas gadasvlebi (egec tqveni modzraobis marshruti:-)))), darekvic mcdeloba (akribet nomeri, daachuret OK da gadaifiqret zaris shesvlamde), carmatebuli da carumatebeli zarebi, da carmatebuli zarebis shemtxvevashi saubaric:-)))))

Mesame "aralegaluri Dirka": radioetershi. AMPS sistemis shemtxvevashi (aseti saqartveloshi Megakomia) radioetershi cmindad Narrow FM signali gadaicema da standartuli scanerit (magalitisatvis AOR) sheidzleba saubris mosmena (TX da RX sixshireebs shoris biji 200 MHz) :-), GSM is shemtxvevashi radioetershi cifrul, impulsur signalebtan gvaqvs saqme da cota ufro chkviani aparaturaa sachiro.... amas garda tuki tqveni aparati radio etershi nakadis deshifracias moaxerxebs, gasatvaliscinebelia, isic rom am shemtxvevashi "dzeblinis" fexdafex devna mogicevt, radganac saburtaloze moseirne mobiluris signals ortachalashi namvilad ver daicher....... aseve tuki Operators gaaqtiurebuli aqvs qselis usafrtxoebis sashualebeli, TIMSI, Ki, Kc, RK, A2,A3, A8 da radioeteris damatebiti shifraciis A5 algoritmi, frequency hopping da misdagvarebi, momakvdavtatvis da mat shoris "bananis qveynis" specsamsaxurebisatvis xelmisacvdomi teqnikit amis gaketeba tavad gansajet fantastikis ra zhanrs ganekutvneba (tumca aqve vityvi imasac, rom arc erti operatori zedmetad tavs da qsels ar tvirtavs yvela algoritmis gaaqtiurebit, radganac, zedmeti traffic da gadatvirtva memgoni ar aklia chvens GSM operatorebs)

Ase rom.........
cnobil frangul gamotqmas cota gadaketebulad shemogtavazebt:
Edzebet "Dirkebi" GSM shi :-))))))))))))