Mobile communications have undergone an amazing development over the last few decades, with new generations coming out roughly every ten years. Each transition from one generation to the next has brought new capabilities and improved technology. The first generation was based on analogue technology and supported only traditional phone calls, while subsequent generations have become increasingly...

Networked real time video applications in a wireless and mobile environment bring a new level of collaboration and communication to the future battlefield. Providing video services with certain deterministic guarantees in a resource limited and error prone wireless network is a challenge. The inefficiency of bandwidtb utilization and degradation of Quality of Service (QoS) are the issues have t...

4G of mobile communications describes the main research and development directives and technologies beyond the 3G of mobile communications. The name is interpreted slightly differently in various publications but signifies similar ideas. Mobile communications have been one of the hottest areas of telecommunications, famous for fast development and growth. First steps of cellular telephony reach...

Communication Profile country overview [1] [2] Mobile Communications: [2] As in much of Latin America, Guatemala's mobile communications market has seen exponential growth after years of low access levels. Helping this

Although mobile computers are becoming more and more powerful, the intrinsic features of wireless communications poor quality, limited bandwidth, continuous disconnections, expensive communications still limit the performance delivered to mobile users. In this paper, we present the Locker Rent Service that allows mobile users to rent a dedicated disk space, located in the fixed network, where t...

Mobile computing is a new style of computer access emerging at the intersection of the two currently dominant trends: producing portable computers in computer industry and wireless communications in telecommunication industry. This paper discusses some key issues involved in realizing a mobile wireless computing environment by examining the characteristics required of each main component: mobil...

In the late 70's and the 80's global search techniques such as Genetic Algorithms (GA's), Simulated Annealing (SA), and Tabu Search (TS) were developed. These procedures are all adaptive, iterative, randomized heuristic searches that are guaranteed to locate the global optimum even in NP-hard combinatorial optimization problems. At about the same time, mobile radio communication systems (such a...

Communications and communication protocols play an important role in mobile robot systems. They enable the latter to address many real world applications. Since the advent of highperformance wireless local area network (WLAN) and ad hoc networking technology at relatively low cost, their use for wireless communications among mobile robots has become a practical proposition. However, in a large ...

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The tremendous demands from social market are pushing the booming development of mobile communications faster than ever before, leading to plenty of new advanced techniques emerging. With the converging of mobile and wireless communications with Internet services, the boundary between mobile personal telecommunications and wireless computer networks is disappearing. Wireless networks of the nex...