Discussion in 'Tech, Gadgets & Science Forum' started by sajolin, Apr 6, 2012.
nasikia kila siku hili neno naombeni mwangaza
imeelezewa vizuri na simple hapa ..
3G - Wikipedia, the free encyclopedia
3G refers to the third generation of developments in wireless technology, especially mobile communications.
Third generation of mobile telephony – 3G technology, or third generations of radio transmission technologies (RTTs) - follows previous two generations of mobile telephony and it is representing standards in mobile telecommunication services satisfying IMT 2000 terms set by the International Communication Union (ICU). It means that 3G technology can provide: conference calls, complex internet access, superior video calls, IPTV, global rooming and transfer rate up to 144 Kbps (kilobits per second) for walking users and stationary and up to 384 Kbps in any moving vehicle.
When we are talking about 3G we are referring to the third generation of wireless technologies - third generations of mobile telecommunications. Before 3G we had 2,5G and 2G technologies. But, what is 3G and what is it allowing us to do easier and better comparing with 2G? Well, it is quite simple: 3G have global roaming, advanced high speed transmition, endless multimedia access, improved video and audio streaming, video-conference support, IPTV. The transfer rate is between 128 and 144 kilobits per second (Kbps).
First time 3G was used in Japan in 2001. It was launched by NTT DoCoMo branded as FOMA. At the beginning, from May 2001 it has started as a test technology. The same company started commercial use of 3G in October of the same year. But it took some time for 3G to reach its global use. Biggest problem with implementing 3G technology was that some operators had to change complete network because it was not compatible with new technology. 3G technology is operating on a different radio frequency than 2G; therefore operators had to ask for new licences for new frequencies. It required a lot of investment. That is why 3G technology started it`s wider use later in 2007. By the June of 2007 there were 200 million of 3G users. Knowing that at the same time there were 3 billion users of mobile phones worldwide, the 6, 7% is not big percentage of 3G users.
Now, with some basic knowledge about what is 3G, there are just few more things that you should know about what is required to use 3G. You need a device to be able to use 3G – mobile phone that is compatible for 3G. So, when you see mobile phones that are advertised as 3G it is just to know that they are 3G compatible it is not a number of the phone or number of the cameras or cards that you can use with it. It is common for 3G phones to have 2 cameras – it is needed to make a video call. 3G is not a Wi-Fi, so you can not get it for free at some hot spots (parks, cafes, hospitals etc), you must be subscribed to the mobile operator. This service is not cheap.
Knowing what is 3G, and having in mind that this useful technology is not for free, not even cheep for users' worldwide, it is up to you to make a decision is this kind of service necessary for you to have on your mobile phone. If it is then go for it you want regret it. If it is not that necessary for your everyday life, it is important that you at least updated about the new technologies and that you know what is 3G.
maelezo kwa kina, nimependa
Du afazali wengine wameuliza.
mi nilidhani ni 3 gigabites!
Kwa hiyo kwa maneno mengine, tunaweza kusena hakuna kitu kinachoitwa 3.75G?
Au nitakuwa nimekosea wakuu?
hicho kipo na sasa hivi kuna hadi 4G..
Hiyo 3.75G ni nini , kuna nini kimeongezwa from 3.5G ,maelezo ya kina plz.
That's why I thought G was for Gigabites, and I still do.
Maelezo ya ziada plz!
Umeiweka vizuri kabisa doubt yangu.
Kama G is for generation, we expect 1st, 2nd 3rd,.......7th.......xth generation.
Kama 2.5G, 3.5G, 3.75G, ni sawa kuwepo basi narudi nilikotoka, G is for Gigabites.
Convince me otherwise
Lugha za electronics naona wakati mwingine hazifuati utaratibu wa hali halisi. Sikutegemea kuona generation ikihesabika ktk nukta. Lakini hata hivyo kwenye wikipedia wanaonesha kama hizo nukta hazibadili mantiki ya whole numbers(pengine mi ndo sijaelewa vizuri). Ila kweli hii "G" kusimama badala ya Generation, mimi imeniacha hoi.
sasa 3.75G ni 4 au 3
KAMA IYO hapo
Mkuu umenivunja mbavu kwa kweli.
Kweli tunahitaji maelezo mazuri kwenye issue hii. Maana hata kwenye wikipedia wamesema hizo 3.5G na 3.75G bado ni 3rd generation tofauti tu ni kuongezeka kwa spdeed. Mimi naona ukweli unabaki pale pale kwamba generation is counted in whole numbers
Naona ma-pro wa jukwaa hili wame lay low
Ntarudi kesho nadhani nitakuta majibu ya doubt yangu
jibu ni lipi wakuu eti?
Za asubuhi ya Muungano?
Unakumbuka connection ya GPRS?
hii ni General Packet Radio Services. Spidi yake 56-114 Kilobits kwa sekunde.
Then unaipata EDGE? Hii ni Enhanced Data rates for GSM Evolution. Kwa lugha nyingine hii inaitwa EGPRS, yaani Enhanced GPRS.
Spidi yake inafika mpaka mia tatu na kitu kilobits kwd sekunde. Hii ni 2nd generation. Mara nyingine huitwa pre 3G.
Then ndo tunaingia kwenye teknolojia ya 3G. Nayo ina evolution kadhaa, kwa mfano HSDPA inaruhusu spidi ya 3.5G. Na hiyo ya 3.75 ina jina lake. Pia 3.9G. Sipati vema majina yake.
Baada ya hapo ndo 4th Generation imeingia. Labda nimesomeka angalau.
mkuu mambo ya IT usilinganishe na social life....utaumiza kichwa bure, huwezi KUFANANISHA GENERATION YA KWENYE SOCIAL LIFE na HII YA KWENYE IT...generation inayomaanishwa hapa imekaa ki techology zaidi yaani at what value technlogy imekuwa improved ukilinganisha na technology iliyopita...ndo hapo unapopata hizo 3.5 na 3.75G yaan kuna vitu vidigovidogo vimeongezwa katika normal technology ya 3G na sasa si 3G tena bali ni 3.5G sababu ya hili ongezeko dogo...na hata ukijaribu kufuatilia hii trend ya ukuaji wa techology utagundua kuwa jinsi inavyokuwa skuhizi ni tofauti na zamani ambapo ilikuwa inachukua kipindi kirefu sana mpaka technology kutoka level moja kwenda ingine sku hizi kila siku mambo yanabadilika na technology inazidi kukuwa...na huo ukuaji wake ndo hivyo unakuwa interms of G's...so usishangae ikija 3.759G...na pia hii inachangiwa na uhuru wa wachangiaji ktk technology kwaani kama saizi ipo 3.75 endapo mtu mwingine akafanya mambo na kuongeza vitu vingine juu yake anaweza kuipa technology yake jina la 3.8G kulingana na jinsi alivyoikuza technology yake na kukubalika na jamii....na hapa ndo unakuta GPRS, EDGE, na nyinginezo...