Wireless networks are now proliferating due to the success of the IEEE 802.11b protocol, also known as “Wi-Fi” (Wireless Fidelity). A Wi-Fi network is characterized by a set of base stations (also called access points) placed throughout the environment and connected to the traditional wired LANs. This technology allows nomadic users a broadband access to the Internet if they are in the transmis...

The development of health tele monitoring through wireless body area networks (WBANs) is an evolving direction in personalized medicine and home-based mobile health care. In a health tele monitoring system, a WBAN consists of a number of lightweight miniature sensors. The sensors measure physiological parameters such as electrocardiography (ECG), electroencephalogram (EEG), body temperature, an...

Today in the 21st-century era we are living a life in which technology has taken control over our physical caliber be it computers, laptops, the navigation system, motor vehicles, radar, satellite or be it minutest things like cell phone or Wi-Fi modem. Each of us is daily users of one or the other electronic gadgets depending on our choice and gets attracted towards it without considering any ...

W i-Fi—consisting of the IEEE 802-11a, 802.11b, and 802.11g technologies—has proven to be a fast wireless-networking approach that is relatively easy and inexpensive to implement. The technology is particularly popular in North America and Asia. About 21 million Wi-Fi (short for wireless fidelity) cards will ship worldwide this year, and 33 million will ship in 2004, said Gemma Paulo, senior an...

Belonging to the same family of standards as Ethernet, it was nicknamed 'Wireless Ethernet' and was considered an appropriate networking technology for offices because it did not rely on cables. Although burdened by inherent insecurity (Fluhrer, 2001) and low bit rates compared to its wired equivalent, IEEE 802.11 was a success. The cost of manufacturing 802.11 chipsets fell quickly and 802.11 ...

The new international standard IEEE802.11p (WAVE) defined enhancements to IEEE802.11 (Wi-Fi). A new mobile e-business platform of Wi-Fi and WAVE is described. Based on cognitive radio, the popular wireless network Wi-Fi can collaborate with WAVE in their common unlicensed spectrum band and licensed spectrum band. As a core technology in the cognitive radio field, OFDM is introduced, and a novel...

Today in the 21st-century era we are living a life in which technology has taken control over our physical caliber be it computers, laptops, the navigation system, motor vehicles, radar, satellite or be it minutest things like cell phone or Wi-Fi modem. Each of us is daily users of one or the other electronic gadgets depending on our choice and gets attracted towards it without considering any ...

Introduction In examining wireless-internet technologies (Wi-Fi), several ethical issues are exposed. While the unauthorized use of Wi-Fi is illegal in a few select cases, what is considered permissible still varies from state to state. What does not vary, however, is the fact that individuals are going to great lengths to locate unsecured wireless access points whether it is for their own bene...