gsm stands for global system for mobile

... (900) 35 35 124 10 10 45 2x7.2 2x7.2 2x25 460.4-467.6 488.8-496 869-894 450.4-457.6 478.8-486 824-849 GSM 450 GSM 480 GSM 850 Duplex channels Duplex Spacing BandDownlinkUplinkGSM systems GSM Time Division Multiplex Frame and Physical Channels TS ... time-slots BTS side MSs side BTS TDMA Frame (4.615 ms) 3 TOPICS • GSM CONCEPTS • GSM SYSTEM ARCHITECTURE • IDENTITIES USED IN GSM • GSM CHANNELS • GSM RADIO LINK • MOBILITY MANAGEMENT • CALL MANAGEMENT • ... messages • International Mobile Equipment Identifier (IMEI) 38 GSM Architecture HLR VLR EIR AUC MSC B S C B S C SMSC PSTN VMSC Mobile Station GSM Air interface OMCR TRAU Base Station System Network and...

Ngày tải lên: 19/10/2013, 15:15

... single-node caching file system layer for Linux that can be used to enha nce the performance of a distributed file system such as NFS [18]. FS-Cache is not a standalone file system; instead it is ... and per- formance of a trad itional cluster file system regardless of the physical distance between data centers. Panache is a scalable, high-performance, clustered file system cache for parallel ... [29] are high ly-scalable object based cluster file systems. These efforts have focused on improving file-serving performance and are not desig ned for remo te ly accessing data from existing file...

Ngày tải lên: 19/02/2014, 18:20

... bandwidth and storage requirement. B. System performance vs. network resource We next evaluate the performance of our system. One major metric of the performance of our system is the message success rate, ... Sprite, a simple, cheat-proof, credit- based system for stimulating cooperation among selfish nodes in mobile ad hoc networks. Our system provides incentive for mobile nodes to cooperate and report actions ... discussed in Sec- tion III, although our system provides incentive for cooperation by giving more credit for forwarding a message, whether or not to forward a specific message will depend on the...

Ngày tải lên: 15/03/2014, 04:20

Ngày tải lên: 28/03/2014, 19:21

Ngày tải lên: 21/06/2014, 11:20

Ngày tải lên: 21/06/2014, 11:20

... McKusick, M., "Performance Effects of Disk Subsystem Choices for VAX Systems Running 4.2BSD UNIX", Computer Systems Research Group, SMM:05-12 A Fast File System for UNIX administration ... byte block UNIX file system. The new file system uses less space than the 512 byte or 1024 byte file systems for indexing information for large files and the same amount of space for small files. These ... [Operating Systems]: Performance − measurements, operational analysis; H.3.2 [Information Systems]: Information Storage − file organization Additional Keywords and Phrases: UNIX, file system organization,...

Ngày tải lên: 12/09/2012, 14:16

... 13 Web-based Geographic Information System 13 3.1. Geographic Information System overview 13 3.1.1. Definition 13 3.1.2. Data representation in GIS system 13 3.1.3. Other terms in GIS system 15 3.1.3. ... according its permission. 4.3. System architecture GreenPeace applied the three-tier architecture for dynamic web based system. It combines rich client design and web-based GIS system at presentation ... of Java Platform that runs on the web-based. Java binary codes may be downloaded to browser before processing. - Microsoft Silverlight: The newest web platform from Microsoft to perform logic...

Ngày tải lên: 27/10/2012, 16:40

... suitable for mobile network with unrestricted mobility node. 4 The information required to calculate the centroid node can easily integrate with the existing CBT multicast protocol for mobile ... protocol. A mobile node forms a RREQ message when it wants to join a multicast group or has information to send to a multicast group, but exists no route to this group. - 15 - In a mobile ad ... numbers are lower for the same group. Thus, for a certain group, a node will have only one entry in the list of its connections from a given neighbor, and it just keeps that information with the...

Ngày tải lên: 23/11/2012, 15:03

Ngày tải lên: 05/09/2013, 08:40

Ngày tải lên: 05/09/2013, 09:08

... Press, New York, 1999. 126 VoIP FOR GLOBAL COMMUNICATIONS 8 VoIP FOR GLOBAL COMMUNICATIONS1 This Chapter discusses how IP-based voice communications can be deployed for global communications in multinational ... An architecture for a packet-based global network for advanced or enhanced VoIP and POTS services in a multinational corporation.) (Source: Adapted from Fig. 3-8) 120 VoIP FOR GLOBAL COMMUNICATIONS If ... a destination, and so on. Therefore, addi- tional resources need to be allocated for these hardware and software plat- forms. The network performance–related information collected using these...

Ngày tải lên: 30/09/2013, 07:20

... replacement a breeze! DIY CO2 System for Planted Aquarium 5 de 25 25/7/2005 15:44 system. In pressurized tank systems, there is generally no liquids, or solids for that matter, to foul or ... Products Aquarium Systems Maxi-Jet PH 600 That Fish Place Big Al's DIY CO2 System for Planted Aquarium 2 de 25 25/7/2005 15:44 atmospheric equilibrium are generally around 2-3ppm. (ppm stands for part ... together. DIY CO2 System for Planted Aquarium 19 de 25 25/7/2005 15:44 Using any or both of these saftey systems insures improved performance and reliability of your overall system. These...

Ngày tải lên: 08/11/2013, 01:15

Ngày tải lên: 07/12/2013, 11:41

Ngày tải lên: 07/12/2013, 11:41

Ngày tải lên: 07/12/2013, 11:41

Ngày tải lên: 07/12/2013, 11:41

... clearly shown that the OBW system could improve the visibility as well as forklift performances. 2. OBSERVE BY WIRE FOR FORKLIFTS 2.1 System overview Operating a forklift is a specialized ... transmit the view of forks’ environment in term of force feedback information, and we named it as observe-by-wire system. (a) (b) Fig. 2 The OBW system configuration, a forklift lifts loads ... (5). Fig. 3 The haptic interface is developed for the OBW system Fig. 4 The haptic interface is developed for the OBW system A fork system and working environment and control algorithm...

Ngày tải lên: 17/12/2013, 11:15

... Healthcare Services l Hospitality and Tourism If a brochure for your industry is not listed above, please contact KRONE for further information. ZERO BITERROR RATE GUARANTEED ... Constellation Street Mairangi Bay North Shore CITY Tel (+64 4) 478 1625 Fax (+64 4) 478 1620 For information on any KRONEPremisNET structured cabling solution, including TrueNet Technology, please ... HEAD OFFICE 2 Hereford Street BERKELEY VALE NSW 2261 Tel (02) 4388 4422 Fax (02) 4388 4499 PO Box 335 WYONGNSW 2259...

Ngày tải lên: 20/12/2013, 22:15