Today, mobile communications play a central role in the voice/data network arena. With the deployment of mass scale 3G just around the corner, new directions are already being researched. In this paper we address about the 4 G mobile communications. The Fourth Generation (4G) Mobile Communications should not focus only on the data-rate increase and new air interface.4G Mobile should instead con...

The development of the Advanced Communications Technology Satellite (ACTS) Mobile Terminal (AMT) and its follow-on, the Broadband Aeronautical Terminal (BAT), have provided an excellent testbed for the evaluation of Kand Ka-band mobile satellite communications systems. Such systems have proven viable for many different commercial and government applications. Combining emerging satellite communi...

Mobile e-commerce (m-commerce) is defined as all activities related to a commercial transaction conducted through communications networks that interface with wireless (or mobile) devices. It is started recently to appear in the scene by exploiting the advantages of internet, mobile computing and mobile communications in order to provide a large number of advanced services to mobile users. In th...

During the last decade several standards for Mobile telecommunications have been developed. The best known is without any doubt the Global Standard for Mobile Communications (GSM) which is operational in many countries, both within and outside Europe. It is now the most successful standard for mobile communications. Also the Digital Enhanced Cordless Telecommunications (DECT) was successfully i...

In mobile communications, one of the most precious commodities is power. The mobile host can only operate as long as its battery maintains power. Since batteries provide limited power, a general constraint of mobile communication is the short continuous operation time of mobile devices. Therefore, power reduction and management is one of the most challenging problems in mobile communications. E...

Mobility and Broadband Communications are becoming increasingly important. The potentials of present Mobile Communications Systems confine to dedicated services like voice communication with limited data communication capabilities or wireless LANs (WLAN). Due to the heterogeneous communication requirements, known from the Broadband-ISDN (BISDN) developement (continuous or bursty traffic charact...

Recent advancements in wireless communication technologies have attracted ad-hoc networking, which enables mobile users to communicate with each other without any infrastructure. While many ad-hoc routing protocols have been proposed, ad-hoc communication and its applications are not widespread. To expedite the widespread use of ad-hoc communications, we turn our attention to the handiest wirel...