The third generation Essay Example | Topics and Well Written Essays - 1750 words

The third generation - Essay Example 3G wireless technology is the new version and is the junction of different 2G wireless telecommunications systems into a sole uniform global system which includes up gradation of terrestrial and satellite components in its functioning.3G or the third-generation wireless was used to refer to this age developments in personal & business wireless technology, particularly the mobile communications. 3G or The Third Generation ushers in many benefits with its mobility, broad bandwidth and high speed communication (upwards of 2Mbps).Network operators & telecommunications service providers are busy in implementing this global third generation (3G) wireless standards in order to fulfill the demand of the customers of that mobile company.3G wireless technology represents a shift from voice-centric services to multimedia-oriented like video, voice, data, fax services.Figure shows an integrated design of a 3G cellular and wireless LAN system (Chuah & Zhang). In a wireless network system, we gene rally have a mobile terminal communicating with a base station in a radio access portion. The radio interface usually terminates within the base station in a wireless LAN system and usually terminates in radio network controller in a cellular system. In CDMA/WCDMA technology, the radio network controller combines the radio frames to facilitate the path diversity from different base station to the users. The circuit and packet data from the radio network controller will be segregated and routed to different portions of the core network. Later voices data are transferred to a mobile switching center and as other data get transferred via specialized routers it support the mobility of accessing the internet. The Different Types/Standard of 3G: The International Telecommunication Union (ITU) is in charge for standardizing 3G. After trying to establish a single 3G standard, ITU at last permitted a family of five 3G standards, which are part of the 3G structure namely IMT-2000: Three standards based on CDMA, namely CDMA2000, WCDMA, and TDSCDMA. Two standards based on based on TDMA, namely, FDMA/TDMA and TDMA-SC (EDGE). The CDMA standards are the most important 3G standards. 1. WCDMA - Wideband Code Division Multiple Access: It is a technology for wideband digital radio communications of Internet, multimedia, video and other capacity-demanding applications. WCDMA is approved as a standard by the ITU under the name IMT-2000 direct spread. It converts the data into a narrowband digital radio signal first, and then it assigned a marker (spreading code) to distinguish it from the signal of other users. WCDMA uses variable rate techniques in digital processing and it can achieve multi-rate transmissions. 2. CDMA 2000 - Code Division Multiple Access 2000: CDMA was launched in 1995 commercially and it very quickly became one of the world's fastest-growing wireless technologies. While later in 1999, CDMA was selected as a standard for new "third-generation" (3G)