The Bluetooth radio system is an ideal communications tool for lightweight autonomous mobile robots but little research interest has been targeted at this application. We present in this paper an environment which allows behavior-based autonomous mobile robotic simulation to take advantage of synthetic Bluetooth communications. Two components comprise our system. A highly adaptable mobile robot...

The demand from social market for high speed broadband communications over wireless media is pushing the requirements of both the mobile and fixed networks. The past decade has witnessed tremendous advancement in the blooming development of mobile communications including mobile-to-mobile and mobile-to-fixed networks. Wireless fixed and cellular networks of future generation will need to suppor...

Reducing CO2 emissions is an important global environmental issue. Over the recent years, wireless and mobile communications have increasingly become popular with consumers. Today’s typical wireless access network consumes more than 50% of the total power consumption of mobile communications networks. Growth of mobile Internet service usage is expected to drive the growth in wireless access dat...

Many mobile applications in wireless networks such as military battlefield, emergency response, mobile commerce, online gaming, and collaborative work are based on the notion of group communications. Designing security protocols for secure group communications in wireless networks faces many technical challenges due to unique characteristics of wireless networks including resource-constrained e...

In recent years, there has been considerable interest in the use of CDMA in mobile communications. Bit error rate is one of the most important parameters in the evaluation of CDMA systems. In this paper, we develop a technique to find an accurate approximation to the probability of bit error for asynchronous direct–sequence code division multiple–access (DS/CDMA) systems by modeling the multipl...

Based on cellular automata (CA), the diffusion of communication products, namely the mobile phone (MP) and the landline telephone (LT), were modeled and simulated. The ordinary least squares (OLS) procedure and nonlinear regression method were carried out to estimate the diffusion parameters. The predicted results were compared with the actual data. It is found that: (1) the diffusion processes...

Mobile networks are proliferating currently in the world with a rather high pace. The number of mobile telecom subscribers has already exceeded one billion and the number will exceed two billions before the year 2010. The big investements needed in the telecom infrastructure raise the question, how much revenues can the operators and other players expect from the investments and what would limi...

The evolution and growth of digital communications technologies has spurred various instances where wireless communications are being tremendously utilized to a multitude of ends and more importantly provoking new paradigm shifts. Digital inclusion and connectivity availability on a global scale remains one critical concern and definitely fuels the motivation and initiative for innovative solut...

In recent years space-division multiple access (SDMA) has been suggested in order to increase the capacity of a cellular mobile communication system and to simultaneously combat the losses due to multipath and interference. This is achieved by using spatial diversity introduced by an antenna array and therefore SDMA can easily be implemented as an additional component into existing systems that...