Next Generation Mobile Systems 3G and Beyond phần 7 pdf

... designed for narrowband signals. The ITU-Tstandardized a wideband codec known as G .72 2 (ITU-T 1986) in 1986. It uses subbandcoding, where the input signal is split into two bands and separately ... increase in available bandwidth, 3G and XG mobile systems offernew possibilities and services. One of these new services will be the ability to stream sound and movies to mobile devices. This section ... illustrates existing speech and audio coding technologies with Next Generation Mobile Systems. EditedbyDr.M.Etoh 2005 John Wiley & Sons, LtdMULTIMEDIA CODING TECHNOLOGIES AND APPLICATIONS 243make...

Next Generation Mobile Systems 3G and Beyond phần 8 pdf

... 3G, the large scale, pervasive, and heterogeneous nature of XG (as weenvision it) will drive the demand for signiﬁcantly more ﬂexible and advanced cryptographictechniques. Next Generation Mobile ... techniques that arecurrently 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 proposal for a general public-key ... watches, and kitchen appli-ances), differing connection characteristics (wired and wireless, lossless and lossy, cablemodem and wireless LAN, etc.), and changes in context (such as network handoff...

Next Generation Mobile Systems 3G and Beyond phần 1 doc

... for the Next Generation 11 Evolution of Mobile Networks and Services 31.1 TheEvolutionofMobileNetworks 41.2 TrendsinMobileServices 61.3 WhyNext -generation( XG)MobileSystems? 91.4 Next- generationImperatives ... others. 3G mobile networks are characterizedby 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 ... functionality and ubiquityenvisioned for next- generation mobile systems. The evolution of each network generation enriches mobile applications, and the applications bring the generation differences...

Next Generation Mobile Systems 3G and Beyond phần 2 docx

... of Mobile NetworkTechnologiesWhile 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 orproposed by the industry for the 3rd Generation Partnership Project (3GPP), 3rd Generation Partnership Project-2 (3GPP2), and Mobile Wireless ... Group (3GPP 1999b). 3GPP uses the term Public Land Mobile Network (PLMN) fora land mobile telecommunications network. The PLMN infrastructure is divided logicallyinto an access network (AN) and...

Next Generation Mobile Systems 3G and Beyond phần 3 docx

... scheme for the systems of IMT-2000 and beyond. 3.2.3 Principles of DS-CDMA and IS-95This section reviews the principle of DS-CDMA, on which the 3G systems and beyond arebased, and discusses ... interworking among WLAN and external networks, and radio resource management.Higher data rates requires broad frequency bands, and sufﬁcient broadband can beachieved in higher frequency bands. Since the ... encoded and then modulated. Theresult is a narrowband signal with a bandwidth of W . After the spreading, the narrowbandsignal becomes a wideband one, occupying the whole channel bandwidth...

Next Generation Mobile Systems 3G and Beyond phần 4 ppsx

... 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 of fast handover, with ... play a role in their next generation, all-IP networks. Consequently, the exact mix ofprotocols that goes into the next- generation wireless network is still experimental and underdevelopment...

Next Generation Mobile Systems 3G and Beyond phần 5 ppsx

... 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 usea ... separate APIs, mobile terminal status and mobile terminallocation. The mobile terminal status API allows applications to obtainthe status of ﬁxed, mobile, and IP-based telephony users. The mobile terminal ... incompatibility and duplicate work. In this case,APPLICATION PLATFORMS FOR NEXT- GENERATION MOBILE NETWORKS 165framework, between SCFs and the framework, and between the enterprise operator and theframework....

Next Generation Mobile Systems 3G and Beyond phần 6 ppt

... 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 ... presented in Figure 7. 2 regarding to 2.5G /3G and XG phones. We will discuss advanced operating systems (Section 7. 3), runtime environments(Section 7. 4), security (Section 7. 5), and future research ... IPv6, and OBEX)• Remote and systems manageability (SNMP v2 Client, Device management client)• Standards support (such as UPnP, Bluetooth, XML and SOAP, and USB)• Extensive storage and ﬁle systems 2See...

Next Generation Mobile Systems 3G and Beyond phần 9 doc

... third generation standardsgroups, 3GPP6 and 3GPP2 (cdma2000 Wireless IP Network Standards-Draft 2001). Thissection brieﬂy addresses current 3G AAA schemes for all-IP networks.3GPPThe 3rd Generation ... bases (for example,3GPP, 3GPP2, and WLAN hotspots), deployment considerations (for example, uniformity instandards-based 3G terminals versus variability in WLAN access devices), and the availabil-ity ... 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. EditedbyDr.M.Etoh...

Next Generation Mobile Systems 3G and Beyond phần 10 docx

... 57 92concepts 59–64current technologies 57 58evolving technologies 58 78 high-speed transmission in HSDPA 72 78 next- generation 78 –91wideband CDMA 64 72 RADIUS AAA protocol 319–321realtime ... OS mobile terminal softwareplatform 1 97 PANA AAA protocol 323–328parametric speech coding standards228, 230–231Parlay telecom APIcurrent standards 163–1 67 web and X-web services 176 – 178 peer-to-peer ... RFC 3 579 , IETF.Aboba B and Simon D 1999 PPP EAP TLS authentication protocol. Technical Report RFC 271 6,IETF.Adachi F, Sawahashi M and Suda H 1998 Wideband DS-CDMA for next- generation mobile...

Xem thêm