Next Generation Mobile Systems 3G and Beyond phần 4 ppsx

... are separate and some- what different fast handover protocols for Mobile IPv4 (El Malki 20 04) and Mobile IPv6 (Koodli 2003a). This chapter describes the overall architecture of fast handover, with ... of 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 adop...

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

... 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 ... limited and low-resolution graphics. In 2.5G and 3G networks, the JPEG standard is adopted and is commonly used in addition to the GIF standard. TFT displays...

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

... 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 are based, and discusses ... 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 5.15-5.35 GHz 2 .4- 2...

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

... 32, 44 .1, 48 kHz 64 kbps/channel MPEG-2 AAC Digital television and high-quality audio 16, 22.05, 24, 32, 44 .1, 48 kHz 48 kbps/channel MPEG -4 AAC Higher quality, lower latency 8 48 kHz 24 64 kbps/channel and ... standards Standard Applications Sampling Bitrates MPEG-1 Broadcasting, storage, multimedia, and telecommunications 32, 44 .1, 48 kHz 32–320 kbps MPEG-2 BC Multichan...

Ngày tải lên: 14/08/2014, 09:21

... 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

... third generation standards groups, 3GPP 6 and 3GPP2 (cdma2000 Wireless IP Network Standards-Draft 2001). This section briefly addresses current 3G AAA schemes for all-IP networks. 3GPP The 3rd Generation ... IP gateway and NAS at the same time. Both IPv4 and IPv6 services are enabled in this fashion. In the case of Mobile IPv4 service, PPP authentication is skipped in favor of M...

Ngày tải lên: 14/08/2014, 09:21

... 1, 4 GSM security standard 289 H.26x video coding standards 246 – 248 HCCA QoS standards for WLAN 121, 123 history of mobile- network technology 3–19 hosts and routers 132 HSDPA and high-speed transmission ... http://www.cs.umd.edu/Library/TRs/CS-TR -44 77/CS-TR -44 77.pdf. UMIACS- TR-2003 -46 . Mishra A, Shin M and Arbaugh W 2003b Proactive key distribution to support fast and se...

Ngày tải lên: 14/08/2014, 09:21