Next Generation Mobile Systems 3G and Beyond phần 5 ppsx

... wire- less link-aware protocols and services. In the last few years, several protocols have been 152 IP MOBILITY 0 123 456 78 0. 05 0.1 0. 15 0.2 0. 25 0.3 0. 35 0.4 0. 45 0 .5 Number of Sessions Fraction ... incompatibility and duplicate work. In this case, APPLICATION PLATFORMS FOR NEXT- GENERATION MOBILE NETWORKS 1 65 framework, between SCFs and the framework, and betw...

Ngày tải lên: 14/08/2014, 09:21

... wireless devices in the 2.4-GHz band and other bands. • The IEEE 802. 15. 2 standard specifically addresses coexistence between WLAN and Bluetooth systems. This standard has adopted an adaptive frequency ... are separate and some- what different fast handover protocols for Mobile IPv4 (El Malki 2004) and Mobile IPv6 (Koodli 2003a). This chapter describes the overall architecture o...

Ngày tải lên: 14/08/2014, 09:21

... for the Next Generation 1 1 Evolution of Mobile Networks and Services 3 1.1 TheEvolutionofMobileNetworks 4 1.2 TrendsinMobileServices 6 1.3 WhyNext -generation( XG)MobileSystems? 9 1.4 Next- generationImperatives ... 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...

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 ... multiplexing (VSF-OFCDM) and variable spreading and chip repetition factors code division multiple access (VSCRF-CDMA) Next Generation Mobile Systems. EditedbyDr.M.Etoh...

Ngày tải lên: 14/08/2014, 09:21

... 1999 Frequency 2.4-2.48 35 GHz 5. 15- 5. 35 GHz 2.4-2.48 35 GHz 2.4-2.48 35 GHz bands and (83 .5 MHz) 5. 7 25- 5.8 25 GHz (83 .5 MHz) (83 .5 MHz) bandwidth DSSS, FHSS (300 MHz) OFDM DSSS DSSS, OFDM Number of 3 ... 802.11 standards summary Standard 802.11 802.11a 802.11b 802.11g Date standard July 1997 September September July 2003 approved 1999 1999 Frequency 2.4-2.48 35 GHz 5....

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 ... IPv6, and OBEX) • Remote and systems manageability (SNMP v2 Client, Device management client) • Standards support (such as UPnP, Bluetooth, XML and SOAP, and USB) • Extensi...

Ngày tải lên: 14/08/2014, 09:21

... illustrates existing speech and audio coding technologies with Next Generation Mobile Systems. EditedbyDr.M.Etoh  20 05 John Wiley & Sons, Ltd MULTIMEDIA CODING TECHNOLOGIES AND APPLICATIONS 243 make ... increase in available bandwidth, 3G and XG mobile systems offer new possibilities and services. One of these new services will be the ability to stream sound and...

Ngày tải lên: 14/08/2014, 09:21

... XG mobile devices. Industrial leaders in mobile network and mobile computing areas have formed OMA on standardizing mobile service architectures and interfaces to enable new services for mobile users. ... 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 technique...

Ngày tải lên: 14/08/2014, 09:21

... 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. EditedbyDr.M.Etoh  20 05 John Wiley ... 11.12. 11.3 .5 IP-based Cellular Networks All-IP cellular networks are currently being considered by the third generation standards groups, 3GPP 6 and 3GPP2 (cdma2000 Wirele...

Ngày tải lên: 14/08/2014, 09:21

... 134– 150 mobile TV phone 250 MPEG audio coding standards 238–241 MPEG video coding standards 246–248 multimedia applications for mobile devices 250 – 256 technologies 2 25 250 mail services 7, 252 382 ... 129– 156 basics 134–136 context transfer 152 – 154 handover 138–141 header compression 151 – 152 intertechnology handover 154 JAIN (Java API for Integrated Networks) 168–174 Jav...

Ngày tải lên: 14/08/2014, 09:21