3G - Laijon Digest May 2011

Tulaiya kisei minthang 3G kiti hi Third Generation of Mobile Telephony tina ahiye. Hiche 3G hi generation ni (1G le 2G) zou’a hung kisiemdoh ahi’n, amasa teni sang’a hoijo le phajo ahi.
First Generation (1G) hi 1980s kipat tillaiya Advanced Mobile Phone Service (AMPS) network akihondoh toh lhon’a hung kisiemdoh ahiye. Hiche AMPS chun analog voice 800MHz frequency a had pole thei ding’a Frequency Division Multiplexing Access (FDMA) ana manchah ahi. Chule Second Generation (2G) hi 1990s laiya mobile operator ho’n digital voice standard ni ahin hondoh lai uva hung kisiemdoh ahikit’e. North America gambung’a chun operator ho’n IS-95 ana siemdoh uvin, hiche hin Code Division Multiple Access (CDMA) ana manchah’a channel khat’a 64 calls 800MHz changeiya had’a ana bawlthei ahiye. Hinla leisiet chung’a cheng mihiem atamjo’n Global System for Mobile Communication (GSM) ana mang uvin ahi. Hiche hin Time Division Multiple Access (TDMA) mangcha’a channel khat’a call 8 900-1800 MHz kikah’a had’a thu ana puohle thei ahikit’e.
Tulaiya 3G kiti Third Generation of Mobile Telephony Standards IMT-2000 hi International Telecommunication Union (ITU) ho khantouna, bandwidth amasaho sang’a tamjo le aki manchahna tamjo le phajo ahi atiuve. Vetsahna’n GSM hin awsuo (voice) bouseh hilou in Circuit-Switched data 14.4 kbps a had’a apuohthei ahiye. Hinla Mobile Multimedia Applications ho a support theina ding in 3G hin Packet-Switched data hoijo le hadjo’a apuohthei ngai ahiye. Chule 2G akuon’a 3G hung suodoh theina ding in mobile operator ho’n aumsa network ho khantouna lam’a upgrade abawl zing uva, chule aphad phad’a mobile broadband network thah apuohdoh’u ngai ahi. Hiche akuon hin 3G bahkai ni (3GPP le 3GPP2) ahung suohdoh kit’e. GPRS hi 2000 kum in akihongdoh in, hiche zou chun 2003 kum in EDGE in ahin zuiyin ahi. Hiche teni hi 3G IMT-2000 nuoiya um hizong leh khatvei kuom leh “2.5G” akiti’n ahi. Azehchu hiche teni hin Multi-Megabit data rate apieh zou lhonlou ahi. Tulaiyin EDGE hi MSDPA (le a uplink partner HSUDA) in akhokhel ta’n ahi. 3GPP nuoiya hin 2007 kum kichai chan in gam 75 sung’ah HSDPA network mong mong 166 aumzou in ahi. Chule GSM maban ding LTE E-UTRA hi 2008 kum kichailam chun seichet anahi.
2002 kum chun 1XRTT ahung kisiemdoh in, hiche zou chun 2004 kum in EV-DO Rev.0 ahung kisiemdoh’e. Hinla 1XRTT hi “2.5G” akiti’n ahi. Azehchu hiche hi EV-DO kikhena ding le khantouna ding’a hung kisiembou ahi. EV-DO standard hi nivei suhlet in ana umkhatai. Revision A service hi 2006 kum in ahung kibawldoh in, hinla hiche hi Revision B in data rate ho channel chuom chuom’a apuohle thei zeh in ahin khelta’n ahi. 3GPP2 ading’a next generation technology, UMB hi aumthei ding’a ginchad umlou ahi. Azehchu CDMA operator atamjo’n UMB sang’a LTE hi adeilhen zoh’u ahiye.
Achung’a kisei LTE le UMB hi 4G (Fourth Generation) ti’n akiminvo’e. Azeh pentah chu hiche teni hin downlink speed tamtah’a asuhhad thei ahiye. Hizongleh hiche tenihi apilhing hih laiye. 4G umdoh theina ding ho zong siem zoulou le guon tuohlou ahi nalaiyin ahi. ITU hin tulaitah’a 4G a jaosah thei ding candidate technology (vetsahna: UMB, LTE, Wimax II tiho) ahol laitah’uh ahiye. Hiche 4G hin atup hochu- data rate aniempen’a 100 Mbps hisah ding, OFDMA transmission manding chule Packet-switch hi IP based voice, data le streaming multimedia ho ading’a manchah ding tiho hi ahi.


Third Generation Partnership Project kiti 3GPP hi 1998 kum’a GSM akuon’a hung kipan 3G tosot ding’a hung kisiemdoh ahi. 3GPP technology in abawlthei hochu:-
1. General Packet Radio Service (GPRS) in 14.4 kbps speed apetheiye.
2. Enhanced Data Rates for Global Evolution (EDGE) in 384 kbps apetheiye.
3. UMTS Wideband CDMA (WCDMA) in downlink speed 1.92 Mbps chan’a had speed apetheiye.
4. High Speed Downlink Packet Access (HSDPA) in downlink speed 14 Mbps chan in asuhad theiye.
5. LTE Evolved UMTS Terrestrial Radio Access (E-UTRA) hin 100 Mbps chan’a had atup ahi.