Overview of Mobile Communications
[ Source: ADTRAN ]
January 2008-
The key attribute of cellular telephony is mobility - the subscriber can be on the move while communication is taking place. Mobility is extended to include the ability to ""Roam"" from coverage area to coverage area. Every registered user has a profile stored in a Home Location Register (HLR) located within the mobile switch in their home MTSO. As the user roams, the cellular phone notifies the roaming location’s network what its ID and telephone ....
Cisco ITP MAP Gateway for Public WLAN SIM Authentication and Authorization
[ Source: Cisco ]
January 2008-
Global System for Mobile Communications (GSM) operators are recognizing the need for high-speed wireless data services. Cisco Systems has embarked on an effort to enable authentication of WLAN subscribers using the existing and well-proven GSM-based user authentication and existing GSM provisioning facilities. Cisco ITP MAP Gateway function enables existing GSM service providers to fully integrate 802.11 technology into their existing GSM network using subscriber-identity-mobile (SIM) cards. Cisco ITP MAP Gateway function enables a WLAN authentication ....
Literature Review: Communication Infrastructure and Wireless Communication in Estonia
[ Source: Informing Science ]
January 2008-
Concerning wireless technology and its infrastructure, one still exist in the land where ""A thousand technologies bloom"". Nearly all of the literature surrounding wireless connectivity states that one needs more uniformity, but no authors could be found who would address how to go about setting industry standards. This paper has seen how Estonia has moved from a place of complete communication control to one where, with respect to a very new technology, few standards or ....
The Mistaken Axioms of Wireless-Network Research
[ Source: Dartmouth College ]
January 2008-
Mobile Ad-hoc Networking (MANET) has become a lively field within the past few years. Since it is difficult to conduct experiments with real mobile computers and real wireless networks in the real world, nearly all published MANET articles are buttressed with graphs produced by simulation, and these simulations are based on common simplifying assumptions. It will come as no surprise that many reviewers and readers of such papers treat these simulation results with less than ....
Airport Wireless LAN: Technology Survey and Simulation Tool Development
[ Source: MITRE ]
January 2008-
The 5000-5250 megahertz (MHz) frequency band is allocated to the Aeronautical RadioNavigation Service (ARNS) on an international basis. The 5030-5091 MHz portion is in use for Microwave Landing System (MLS) applications. The aviation community is exploring other applications in the 5091-5150 MHz band, referred to as C-band in this report, to support aeronautical applications. This paper documents a preliminary investigation on the applicability of the Wireless Local Area Network (WLAN) and cellular network technologies, for ....
Space-Time-Frequency Transmit Diversity in Broadband Wireless OFDM Systems
[ Source: DoCoMo Euro-Labs ]
January 2008-
This paper published by DoCoMo Euro-Labs considers space-time - frequency transmits diversity with orthogonal designs in a broadband OFDM system. On capacity considerations for Gaussian as well as real world signal constellations, it show that the concatenation of an outer error control code, a bit interleaver and orthogonal spatial transmit diversity provides an attractive MIMO scheme which is robust to channel imperfections such as spatial correlation. It proposes an application of orthogonal designs for space-time-frequency ....
Image Systems Using RFID Tag Positioning Information
[ Source: Nippon Telegraph and Telephone ]
January 2008-
ADSL and other broadband services are proliferating at an increasingly rapid pace, and the distribution of stored image contents has now begun. Users can obtain network cameras at an affordable price, and one can expect to see a steady increase in the types of images that can be used, including live images sent by video phone. One expects that there will be an increase in demand for simpler selection of images that are of interest ....
OFDM-CDMA Versus DS-CDMA: Performance Evaluation for Fading Channels
[ Source: German Aerospace Center ]
January 2008-
Multiple access systems based on DS-CDMA have achieved increasing signicance for mobile communications applications. OFDM-CDMA systems have been proposed lately. The aim of this study is to carry out a performance comparison between DS-CDMA and OFDM-CDMA. Both techniques are considered for the downlink base to mobile since for this application power efficient mobile receivers with low complexity are required. The analysis enables a performance comparison between the DS-CDMA system and the OFDM-CDMA system with respect ....
Content Charging and Revenue Chain Management
[ Source: Intel ]
January 2008-
3G and new wireless technologies are unleashing a capacity on the telecommunications market that will drive new services, revenue streams and customers. There are many considerations for the operator here, from the management of multiple, incompatible yet concurrent business models, to the explosion in customer types and profiles. Deployed on Intel architecture and Hewlett-Packard hardware, Oracle technology combines with Am-Beo’s rate-rec product to provide a complete content charging and revenue chain management solution. The solution ....
Wireless Fidelity (WiFi) Technology Reaching the Home Market in 2004
[ Source: Information Technology Association of America ]
January 2008-
Innovation At-the-Edge’s mission is to educate, inform and organize opinion around the value proposition of emerging ""Edge of the network"" applications. WiFi or Wireless Fidelity refers to the technology surrounding the radio transmission of internet protocol data from an internet connection wirelessly to a host computer. Most often the internet connection is a higher speed one such as satellite, DSL or cable rather than slower dial-up connections. This paper from Information Technology Association of ....