due to their advantages, omni-directional mobile robots have found many applications especially in robotic soccer competitions. however, omni directional navigation system, omni-vision system and kicking mechanism in such mobile robots have not ever been combined. this situation brings the idea of a robot with no head direction into existence, a comprehensive omni directional mobile robot. such...

Recent advances in wireless and mobile communications infrastructure are enabling governments to deliver and manage services to citizen efficiently and economically. Mobile government provides this ability to governments. This paper presents the ggovernance approach in effective development of mobile government. The objective is reviews(identify and ranking) of public service concept (Included:...

Considering the widespread adoption of smartphones in mobile communications and the well-established resource sharing use in the networking community, we present a novel mechanism to achieve anonymity in the Global System for Mobile Communications (GSM). We propose a Voice over Internet Protocol infrastructure using the Session Initiation Protocol (SIP) where a smartphone registers on a SIP reg...

In mobile environments, packet transmission services suffer from packet losses due to e.g. inadequate received signal quality, which is caused by the time and frequency selectivity of the mobile radio channel and by imperfections of mobile terminals, but also due to time-outs and entailed packet deletions, forced by protocols in the signaling domain of the infrastructure of a mobile communicati...

This tutorial paper describes the current development in the use of low earth orbiting satellites (LEOS) for global personal communications. The basic architectures and rationales for design choices are discussed. Representative TDMA and CDMA systems are outlined and a summary of the diierences between LEOS communications and terrestrial cellular is presented along with the prospects for CDMA b...

This paper describes the design and implementation of an SMS transmission system using the PDU (Protocol Data Unit) mode of a GSM (Global System for Mobile Communications) modem. The system may be used in several applications: telemetry or remote control, using short messages from a standard GSM mobile phone, and in other application circuits. In order to perform these applications, coding and ...

Video verification on mobile devices, such as cell phones and tablet PCs, gives a useful capability to remotely check the current state of affairs in a particular place without the need to constantly monitor the site and record video from the camera. In this paper, we show an architecture, communication protocol and implementation details of the system for remote video verification and video su...