A layer for efficient communication on clusters of Personal Computers (PCs) using the Linux operating system is proposed. Besides optimizing communication performance, by reducing the latencies and increasing the bandwidth figures even for short messages, the proposed communication system also meets other requirements such as multiprogramming, portability, protection against corrupted programs,...

We propose and analyze mobile service management schemes based on location-aware proxies with the objective to reduce the network signaling and communication cost in future personal communication systems (PCS). Under these schemes, a mobile user uses personal proxies as intelligent client-side agents to communication with services engaged by the mobile user. A personal proxy cooperates with the...

This paper deals with the proposal and performance evaluation of a Fixed Microwave Communication (FMC) system that shares the same bandwidth with a wireless personal communication system. In particular we focus here on the case of an existing UMTS network. The main application of the FMC system is for wireless connections between remote base stations and a core network access point in a dense u...

In this paper, a new Markovian model is developed to analyze the Packet Reservation Multiple Access (PRMA) protocol over Rician fading channels with lognormal shadowing. The packet dropping probability and the voice user capacity are defined as the performance measures. A new formula is derived to evaluate the dropping probability in the fading environment. The analytical results from our new f...

The Global System for Mobile Communication (GSM) is a popular mobile communication standard. GSM networks collect personal communication information required for the billing of its subscribers. These communication records, known as Call Data Records (CDRs), may infringe on basic subscriber privacy principles as personal details of performed network events are managed and stored by the serving G...

Nowadays, the evolution of wireless communication and network technologies enables remote medical services to be available everywhere in the world. In this paper, a network-based system architecture adopting wireless personal area network (WPAN) protocol IEEE 802.15.4/Zigbee standard and 3G communication networks for remote medical applications is proposed. In the proposed system, the number an...

Digital mobile telecommunication systems have become a future trend in personal communications services (PCS) networks. To satisfy the demand for high quality services, security functions, including the authentications of communication parties and the confidentiality of communication channels, must be embedded into mobile communication systems. This work presents an authentication scheme to sup...