For wireless operators deploying latest-generation cellular systems based on packet-switched data such as GPRS and CDMA2000, and especially those targeting business customers for significant portion of their revenue stream, the importance of services based on MVPN technologies is hard to underestimate. For operators, MVPN is not only one of the required technologies for business customers' private network access but also a foundation for other services requiring interaction with private networks...
Saturday, October 31, 2009
What is 3G or Wideband Digital Cellular System
The 3rd generation wireless requirements are defined in the International Mobile Telecommunications “IMT-2000” project developed by the International Telecommunication Union (ITU). The IMT-2000 project that defined requirements for high-speed data transmission, Internet Protocol (IP)-based services, global roaming, and multimedia communications. After many communication proposals were reviewed, two global systems are emerging; wideband code division multiple access (WCDMA) and CDMA2000. Wideband...
Upgraded Digital Cellular System (Generation 2.5)
The types of upgraded 2nd generation digital cellular systems (generation 2.5) include GPRS, EDGE, and CDMA2000TM , 1xRTT. General Packet Radio Service (GPRS) General Packet Radio Service (GPRS) is a portion of the GSM specification that allows packet radio service on the GSM system. The GPRS system adds (defines) new packet channels and switching nodes within the GSM system. The GPRS system provides for theoretical data transmission rates up to 172 kbps. Enhanced Data Rates for Global Evolution...
What is Code Division Multiple Access (IS-95 CDMA)
Code Division Multiple Access (CDMA) system (IS 95) is a digital cellular system that uses CDMA access technology. IS-95 technology was initially developed by Qualcomm in the late 1980’s. CDMA cellular service began testing in the United States in San Diego, California during 1991. In 1995, IS-95 CDMA commercial service began in Hong Kong and now many...
Bangladesh WiMAX First Introduces Augere Brand Name 'Qubee'
Jerry Mobbs, chief executive officer ofAugere, speaks at the launch of thecompany's wireless broadband service in Dhaka yesterday.Photo: Masthead PRAugere Wireless Broadband Bangladesh Ltd yesterday launched the much-waited wireless broadband service through WiMax in some designated areas in Dhaka.Augere, one of the two WiMax licensees, is the first...
Global System for Mobile Communication (GSM)
The Global System for Mobile Communications (GSM) system is a global digital radio system that uses Time Division Multiple Access (TDMA) technology. GSM is a digital cellular technology that was initially created to provide a single-standard pan-European cellular system. GSM began development in 1982, and the first commercial GSM digital cellular system...
WiMAX Advantages
The IEEE 802.16 standard is designed for WMAN networks. It provides inter-operable broadband wireless connectivity to fixed and nomadic users. Itprovides up to 50 km of service area and allows the users to get broadbandconnectivity without the need of direct line of sight to the base station. It pro-vides a total data rate of up to 75 Mbps, which is enough to simultaneouslysupport a lot of business and home requirements. The advantages of WiMAXare given as follows.1. High CapacityA single WiMAX...
What do you mean by WiMAX Standard
WiMAX technology is specified by IEEE as IEEE 802.16 standard. The technology extends as IEEE 802.16 a, b, d, and e and they operate in different frequencies band and different data rate. TheIEEE802.16-2004 includes P2P, P2MP and mesh access networks while the IEEE 802.16e-2005 includes mobility. Table 1.1 shows WiMAX Standar...
History of Mobile Cellular System
First Generation(1G)The 1G period began in the late 1970s and lasted through the 1980s. These systems featured the first true mobile phone systems, known at first as "cellular mobile radio telephone." These networks used analog voice signaling, and were little more sophisticated than the repeater networks used by amateur radio operators. Second Generation (2G)The 2G phase began in the 1990s and much of this technology is still in use. The 2G cell phone features digital voice encoding. Examples include...
WiMAX, How do WiMAX Works?
Worldwide interoperability for microwave access (WiMAX), based on theInstitution of Electrical & Electronics Engineering (IEEE) 802.16 standards,enables wireless broadband access anywhere, anytime, and on virtuallyany device. When users want broadband service today, they are generallyrestricted to a T1, digital subscriber loop (DSL), or cable...
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