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 ....
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 ....
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 ....
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 ....
Radio Interface Layer (RIL) White Paper
[ Source: Microsoft ]
January 2008-
The Radio Interface Layer, RIL, provides a key component of the underlying technology that is critical for enabling wireless voice or data applications using Windows Mobile software to seamlessly communicate with a GSM/GPRS or CDMA2000 1X modem. The RIL interfaces between the CellCore layer in Windows Mobile and the radio protocol stack within the wireless baseband system (modem). This paper presents a comprehensive review of the Windows Mobile Radio Interface Layer, RIL, including the following ....
An OPNET Modeler Simulation Study of the VISA Protocol for Multi-Network Authentication
[ Source: University of Florida ]
January 2008-
In the last decade of the twentieth century, wireless communications was believed to be heading toward a global wireless system, such as UMTS or IMT2000. In fact, wireless communications is rapidly becoming a highly distributed collection of different types of networks. The third Generation (3G) wireless communications infrastructure has become a highly distributed collection of wireless networks that offer a wide variety of options for connectivity. In this paper, an adVanced Inter-System Authentication (VISA) process ....
Health Care Sensor Networks - Architecture and Protocols
[ Source: Old City Publishing ]
January 2008-
Wireless sensor networks research is primarily focused on large networks of tiny devices with sensing capabilities, able to perform simple data processing tasks and to communicate wirelessly between themselves to exchange data. Once devices are deployed, networks are established automatically using self-organization protocols. Data is forwarded to appropriate sensor nodes using multi-hop routing protocols. This paper from Old City Publishing explains architecture of a health-care system based on personal mobile health-care sensor networks is proposed ....
Obtaining and Installing a VeriSign WLAN Server Certificate for PEAP-MS-CHAP V2 Wireless Authentication
[ Source: Microsoft ]
January 2008-
Protected Extensible Authentication Protocol-Microsoft Challenge Handshake Authentication Protocol version 2 (PEAP-MS-CHAP v2) provides secure wireless authentication using passwords. To use PEAP-MS-CHAP v2, the Internet Authentication Service (IAS) Remote Authentication Dial-In User Service (RADIUS) servers performing wireless authentication need a computer certificate and wireless clients need to trust the computer certificate of the IAS server.
Mobile Phone Users: Another High Health Risk Group
[ Source: Kamla-Raj Enterprises ]
January 2008-
A mobile (cell) phone is a low power, single channel two-way-radio and emits signals via radio waves, which comprise radio frequency (RF) energy, a form of electromagnetic radiation. Some reported biological effects associated with these radiations include radiofrequency sickness, electroencephalographic and blood pressure changes, cancer risks and genotoxicity. Since exposure to radiofrequency radiations has been reported to affect physiological, neurological, cognitive and behavioral changes and to induce, initiate and promote carcinogenesis, such an underlying threat ....
Entrepreneurial Founder Effects in the Growth of Regional Clusters: How Early Success Is a Key Determinant
[ Source: Danish Research Unit on Industrial Dynamics ]
January 2008-
This paper studies in great detail the growth of the wireless communication cluster in Northern Denmark. Unlike the leading theories, the paper argues that preliminary success of the first firms are the main driving force behind the generation of new firms that ultimately lead to the formation of clusters. The success of the first firms tends to generate spin-offs, which become successful themselves due to the background of the founders.