3GPPT1new(GAGAN)

WHAT IS 3G? : 

WHAT IS 3G? 3G is the third generation of tele standards and technology for mobile networking It is based on the International Telecommunication Union (ITU) family of standards under the IMT-2000. evolved to incorporate high-speed Internet access and video telephony.

history : 

history The first pre-commercial 3G network was launched by NTT DoCoMo in Japan branded FOMA, in May 2001 on a pre-release of W-CDMA technology By June 2007 the 200 millionth 3G subscriber had been connected. Out of 3 billion mobile phone subscriptions worldwide this is only 6.7%.

Topics Related to 3G Evolution: : 

Topics Related to 3G Evolution:

WCDMA 3G STANDARD : 

WCDMA 3G STANDARD

Slide 12: 

Code Division Multiple Access (CDMA) Each User Has a Unique Code CDMA Is Really FDMA With Multiple Users, Identified by Codes, Sharing Each Frequency Channel User 1 User 2 User 3 User N User 1 User 2 User 3 User N Time Frequency

Slide 13: 

W-CDMA spreads signals over a frequency range several hundred times broader than conventional system's, and allocates single time slots to each user. Since this method allows all users to share the broad bandwidth, splitting the bandwidth becomes unnecessary and transmission efficiency is vastly improved. In addition, spread spectrum is highly resistant to disturbance and noise, and the use of a common frequency in all cells minimizes jamming and interference. The need for frequency-switching when a user moves from one station's coverage to another is eliminated to make high-quality communications possible.

UMTS (Universal Mobile Telecommunications Services) : 

UMTS (Universal Mobile Telecommunications Services) The European term for 3G cellular systems based on the IMT-2000 standard Data rates of UMTS are: 144 kbps for rural 384 kbps for urban outdoor 2048 kbps for indoor and low range outdoor

Radio Network Controller (RNC) area : 

Radio Network Controller (RNC) area The Radio Network Controller (RNC) area is an area of radio coverage consisting of one or more cells controlled by one RNC. The boundaries of a RNC area and a location area are independent; a location area may span the boundary between RNC area and a RNC area may span the boundary between location areas.

The Radio Network System (RNS) : 

The Radio Network System (RNS) The Radio Network System (RNS) is the system of base station equipments (transceivers, controllers, etc...) which is viewed by the MSC through a single Iu-interface as being the entity responsible for communicating with Mobile Stations in a certain area. Similarly, in PLMNs supporting GPRS, the RNS is viewed by the SGSN through a single Iu-PS interface. The radio equipment of a RNS may support one or more cells. A RNS may consist of one or more base stations. The RNS consists of one Radio Network Controller (RNC) and one or more Node B.

W-CDMA Versus cdma2000 : 

W-CDMA Versus cdma2000

APPLICATIONS : 

APPLICATIONS Video broadcasting e-commerce services such as, stock transactions and e-learning will now be made possible much faster. Conferences Mobile Interview

DRAWBACKS: : 

DRAWBACKS: Expensive input fees for the 3G service licenses Expense of 3G phones Lack of coverage, because it is still a new service High prices of 3G mobile services in some countries, including Internet access