Next Generation Mobile Systems 3G and Beyond phần 8 pdf

... 3G, the large scale, pervasive, and heterogeneous nature of XG (as we envision it) will drive the demand for significantly more flexible and advanced cryptographic techniques. Next Generation Mobile ... techniques that are currently used in 2G and 3G systems. This includes secret-key cryptography, as used in GSM and 3GPP systems, public-key cryptography, as used in SSL, and...

Ngày tải lên: 14/08/2014, 09:21

... designed for narrowband signals. The ITU-T standardized a wideband codec known as G.722 (ITU-T 1 986 ) in 1 986 . It uses subband coding, where the input signal is split into two bands and separately ... domain. 8 Multimedia Coding Technologies and Applications Minoru Etoh, Frank Bossen, Wai Chu, and Khosrow Lashkari 8. 1 Introduction As the bandwidth provided by next- generation...

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... others. 3G mobile networks are characterized by their ability to carry data at much higher rates than the 9.6 kbps (kilobits per second) Next Generation Mobile Systems 3G and Beyond EVOLUTION OF MOBILE ... Generation 1 1 Evolution of Mobile Networks and Services 3 1.1 TheEvolutionofMobileNetworks 4 1.2 TrendsinMobileServices 6 1.3 WhyNext -generation( XG)MobileSyst...

Ngày tải lên: 14/08/2014, 09:21

... of Mobile Network Technologies While the first-, second-, and third -generation cellular networks are based on circuit switch- ing and provide voice-centric services, the next- generation (XG) mobile ... review of the main 3G architectures, those developed or proposed by the industry for the 3rd Generation Partnership Project (3GPP), 3rd Generation Partnership Project-2 (3GPP...

Ngày tải lên: 14/08/2014, 09:21

... IEEE 80 2.11 standards summary Standard 80 2.11 80 2.11a 80 2.11b 80 2.11g Date standard July 1997 September September July 2003 approved 1999 1999 Frequency 2.4-2. 483 5 GHz 5.15-5.35 GHz 2.4-2. 483 5 ... scheme for the systems of IMT-2000 and beyond. 3.2.3 Principles of DS-CDMA and IS-95 This section reviews the principle of DS-CDMA, on which the 3G systems and beyond a...

Ngày tải lên: 14/08/2014, 09:21

... (PLCP) preamble and header are the same in both 80 2.11 and 80 2.11b. The Physical Service Data Unit (PSDU) uses OFDM and has the same structure as in 80 2.11a. Depending on the 48- subcarrier BPSK, ... (DFS) and transmit power control (TPC) in order to share with radar systems. Current research is focused on the coexistence of wireless devices in the 2.4-GHz band and other ban...

Ngày tải lên: 14/08/2014, 09:21

... foreign agent in Mobile IPv4 and home agent in Mobile IPv4 and Mobile IPv6 are examples of routing proxies. A routing proxy obscures the mobile host’s location by allowing the mobile host to use a ... separate APIs, mobile terminal status and mobile terminal location. The mobile terminal status API allows applications to obtain the status of fixed, mobile, and IP-based...

Ngày tải lên: 14/08/2014, 09:21

... handsets and external resources (such as printers, vending machines, displays, and handsets), handsets and ubiquitous computing environments (such as offices, airports, and homes), and handsets and ... Infrastructure Figure 7.11 Middleware services for next- generation handsets 186 APPLICATION PLATFORMS FOR NEXT- GENERATION MOBILE NETWORKS 1 980 1990 2000 2010 IN AIN JTAP...

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... IEEE 80 2.1X standard originally focused on IEEE 80 2.3 (Ethernet) and IEEE 80 2.5 (Token-ring) LANS, but it is now being used in wireless security with the IEEE 80 2.11 standard. The IEEE 80 2.1X ... author must spend time and money to obtain a certificate; • the certificate authority (CA) only provides the name and address of the code author; Next Generation Mobile Systems....

Ngày tải lên: 14/08/2014, 09:21

... support for mobile devices 213 INDEX 379 generations of mobile- network technology 1, 4 GSM security standard 289 H.26x video coding standards 246–2 48 HCCA QoS standards for WLAN 121, 123 history of mobile- network ... technologies 57–92 concepts 59–64 current technologies 57– 58 evolving technologies 58 78 high-speed transmission in HSDPA 72– 78 next- generation 78 91 wideband C...

Ngày tải lên: 14/08/2014, 09:21