Many initial developments in multimodality focused on systems with unconstrained set of resources, such as those found in desktops, kiosks and rooms with high performance processors, large displays and hi-fidelity audio capabilities. In contrast, mobile cellular handsets are highly constrained, characterized by small screens, restrictive keyboards and intermittent network connectivity. Despite ...

The widespread use of wireless cellular networks has made security an ever increasing concern. GSM is the most popular wireless cellular standard, but security is an issue. The most critical weakness in the GSM protocol is the use of one-way entity authentication, i.e., only the mobile station is authenticated by the network. This creates many security problems including vulnerability against m...

Cellular Digital Packet Data (CDPD) is a new standard, adopted by a consortium of the major United States cellular telephone companies, for data communication with wireless mobile hosts. CDPD is designed to carry data packets using using either IP or CLNP over the current cellular telephone network, utilizing the available idle capacity of the network not used by voice calls. Although much has ...

Data gathering is a fundamental task of Wireless Sensor Network (WSN). Recently, mobile sink has been exploited for data gathering in WSN to reduce and balance energy expenditure among sensors. To collect and transmit the data using energy efficient schemes in case of multiple mobile sinks is a hot research topic. In this project, a multiple mobile sinks energyefficient data collection (MSEDC) ...

Mobile Internet technology based on wireless cellular networks has been rapidly deployed over the last several years. In the Internet, TCP (Transmission Control Protocol) is used as a standard transport layer protocol. TCP was developed in the early 1970s and has been continuously improved. Though it was designed for a wired network, it has also been used for wireless networks but without enoug...

Nowadays, wireless packet data services are provided over Wireless MAN (WMAN) at a high data service rate, while 3G cellular networks provide wide-area coverage at a low data service rate. The integration of mobile WiMAX and 3G networks is essential, to serve users requiring both high-speed wireless access as well as wide-area connectivity. In this paper, we propose a cross-layer optimization s...

All mobile carriers these days have provided 3G and 4G services to their customers. The evolution of cellular networks from 3G to 4G has improved several performance metrics of the data communications. The focus of this paper is to evaluate two of the most important performance metrics: throughput and delay. We consider the cellular network as an integrate infrastructure that includes mobile an...

This paper proposes an efficient network architecture to improve energy consumption in Wireless Sensor Networks (WSN). The proposed architecture uses a mobile data collector to a partitioned network. The mobile data collector moves to center of each logical partition after each decision period. The mobile data collector must declare its new location by packet broadcasting to all sensor node...

This paper proposes an efficient network architecture to improve energy consumption in Wireless Sensor Networks (WSN). The proposed architecture uses a mobile data collector to a partitioned network. The mobile data collector moves to center of each logical partition after each decision period. The mobile data collector must declare its new location by packet broadcasting to all sensor node...

The mobile broadcasting services such as mobile television (TV) and interactive social TV become more popular in wireless broadcasting networks and attract a lot of research attention in pervasive computing. However, due to the error-prone nature of wireless broadcast, how to efficiently recover packet loss at mobile devices is a big challenge. To solve this problem, many research efforts sugge...