Articles and tutorials regarding 3G http://www.troobloo.com/tech/3g.shtml en-us http://www.wirelessdevnet.com/channels/wireless/training/mobilewirelesstomorrow7.html by Puneet Gupta They're Already Talking About 4G! Several new standards have been proposed which don't fit into this classification of 2, 2.5 or 3G. These standards either provide only data services and/or provide much higher data rates than those specified by 3G systems. Examples are 1Xplus and 1XTREME. Since they use a single CDMA carrier they may be called 2.5G but then they provide much higher data rates than 3G. According to Motorola, 1XTREME will not require additional antennas as... http://www.wirelessdevnet.com/channels/wireless/training/mobilewirelesstomorrow2.html Technologies like GPRS (General Packet Radio Service), High Speed Circuit Switched Data (HSCSD) and EDGE fulfill the requirements for packet data service and increased data rates in the existing GSM/TDMA networks. I'll talk about EDGE separately under the section "Migration To 3G". GPRS is actually an overlay over the existing GSM network, providing packet data sevices using the same air interface by the addition of two new network elements, the SGSN and GGSN, and a software upgrade.... http://www.windowsitpro.com/Articles/Index.cfm?ArticleID=38032 John fields reader responses to his January 30 commentary. John D. Ruley InstantDoc #38032 February 13, 2003 My comments about General Packet Radio Service (GPRS) problems in the January 30 edition of Mobile & Wireless UPDATE generated quite a few responses. (To read that commentary, "GPRS Moving Violation?," go the URL at the end of this paragraph.) I want to present a sampling of the messages I received. http://www.windowsitpro.com/articles/index.cfm?articleID=37860 Tim Boden reported... http://www.intranetjournal.com/articles/200202/na_02_02e.html Intranet Journal Staff 02/20/02 Printer Friendly Version Lucent Technologies said it has successfuly demonstrated secure wireless Internet protocol (IP) virtual private network (VPN) connections. The tests involved the establishment of secure data access from a universal mobile telecommunications system (UMTS) data test terminal connected to a corporate intranet over a Lucent 3G UMTS network. According to Lucent, its secure IP VPN mobility solution will help operators of 3G UMTS... http://www.wirelessdevnet.com/channels/wireless/training/mobilewirelesstomorrow4.html The 3rd Generation Mobile System will most likely grow out of the convergence of enhanced 2nd generation mobile systems with greater data transfer speed and capacity and 1st generation satellite mobile systems. Evolution to the current generation mobile networks to 3G doesn't necessarily mean seamless upgradation to the existing infrastructure to the 3G. Evolution should also be seen in context of coexistence of the 2G and 3G networks for some time, with users able to roam across the... http://www.fawcette.com/dotnetmag/2002_06/magazine/columns/devicedirections/ The next wave of wireless devices and services are on the horizon, but it's unclear whether they'll truly enable wireless for the enterprise. by Steve Makofsky For this solution: PDA or laptop, GSM/GPRS wireless adapter, 802.11b compact flash or PCMCIA adapter A nxiously awaited for 2.5G and 3G technologies are no longer as compelling as they once seemed (see the sidebar, " Get the Buzz on Wireless Technology "). This is especially true now that lower-cost (and IT-maintainable) wireless... http://www.sdmagazine.com/documents/sdmsdw2a/ 1G, 2G, 3G: It5;s a new day for mobile development By Dana Cline March 27, 2003 In the past, the wired world has existed separately from wireless telecommunications. Now, the two fields are converging. Bill Day5;s March 26 session on wireless development gave an overview of various protocols and platforms, but fell short of inspiring this developer to abandon the desktop. A Sun Microsystems Technology Evangelist, Day started off explaining all the flavors and generations of cellular... http://www.wirelessdevnet.com/channels/wireless/training/mobilewirelesstomorrow3.html Standardization of 3G mobile systems is based on ITU (International Telecom Union) recommendations for IMT 2000. IMT 2000 specifies a set of requirements that must be achieved 100% for a network to be called 3G. By providing multimedia capacities and higher data rates, these systems will enhance the range and quality of services provided by 2G systems. The main contenders for 3G systems are wideband CDMA (W-CDMA) and cdma2000. The ETSI/ GSM players including infrastructure vendors such... http://www.wirelessdevnet.com/channels/wireless/training/mobilewirelesstomorrow6.html A variety of technologies/standards exist and therefore, so do the number of paths that can be taken. The table below briefly summarizes these standards. GSM and TDMA To 3G GSM and TDMA systems have more or less the same set of options for migrating to 3G. The path to 3G is not as simple in case of GSM/TDMA as is in the case of CDMA. The main evolutionary standards are GPRS, EDGE and, finally, W-CDMA. Vendors are positioning each of these standards as a step to the next, but operators... http://www.wirelessdevnet.com/channels/wireless/training/mobilewirelesstomorrow5.html EDGE is a new time division multiplexing based radio access technology that gives GSM and TDMA an evolutionary path towards 3G in 400, 800, 900, 1800 and 1900 MHz bands. It was proposed to ETSI in 1997 as an evolution to GSM. Although EDGE reuses GSM carrier bandwidth and time slot structures, it is not restricted to use in GSM cellular systems only. In fact, it can provide a generic air interface for higher data rates. It provides an evolutionary path to 3G. Some call it 2.5G. It can... http://wireless.java.sun.com/midp/articles/midp2network/ by Qusay H. Mahmoud April 2003 Version 1.0 of the Mobile Information Device Profile (MIDP) lacks low-level networking support for TCP/IP sockets and UDP/IP datagrams, but the MIDP 2.0 specification (JSR 118) has responded to the needs of the 2.5G and 3G networks now being deployed by adding support for sockets and datagrams, thus providing mobile applications more capable networking interfaces. This support is based on the Generic Connection Framework (GCF) of the Connected Limited... http://www.oreillynet.com/pub/a/mac/2002/10/18/isync_bluetooth.html by Wei-Meng Lee 10/18/2002 Apple has released the beta version of iSync, the synchronization software based on the SyncML protocol. iSync synchronizes the contact and calendar information on your mobile devices with your Macintosh. In addition, if you have more than one Mac, it will also help to synchronize the information in your address book and iCal calendars. (.Mac membership is required.) The mobile devices supported by iSync include the latest GPRS, Bluetooth-enabled phones (such... http://www.wirelessdevnet.com/channels/wap/training/wml6.html Without the ability to perform server transactions, WML would only serve to provide a standardized way to display text on a client. Adding in the ability to dynamically connect to remote servers opens up every WAP device to the world of Internet messaging, enterprise data, and e-commerce. WAP devices interact with these data sources through a WAP gateway as mentioned in our WAP Overview tutorial. This gateway must interface with a carrier such as CDMA, GSM, or GPRS. However, it is...