MOBICOM

In this paper, we show how secret sharing can be used to address a number of shortcomings in state-of-the-art public-key-based inter-provider roaming. In particular, the new concept does not require costly operations for certificate validation by the ...

Current location-aware information systems lack an effective method of maintaining and updating dynamic, location-specific content. We have developed a design for representing location-specific content that balances flexibility and comprehensibility. We ...

In this report we introduce a "QoS Seeker" system for VoIP over 802.11b. QoS Seeker addresses the realistic situation where the QoS delivered to an end user's wireless VoIP application is a complex function of location and time. It attempts to ...

This paper describes the implementation of a Bluetooth Village Guide Book (VGB) scenario for use in the Kelvin Grove Urban Village located in Brisbane, Australia. An Information Point Station Network (IPSN) was developed, along with software for two ...

Video communication over lossy packet networks such as the Internet or wireless links, is hampered by packet loss. Indeed, video quality severely degrades in presence of lost packets. This paper describes a technique based on Unbalanced Multiple ...

Accounting performed by network and service providers covers the tasks of determining, collecting, and evaluating information on the service usage of their customers. This information forms the basis of the subsequent charging process. For performing ...

Wireless access has already become a ubiquitous way to connect to the Internet, but the mushrooming of wireless access infrastructures throughout the world has given rise to a wide range of user authentication, authorization and accounting (AAA) ...

We develop an analytical model of rate adaptive Wireless LAN and downlink traffic flows to randomly located users in the range of an access point. We first calculate the service time distribution of packets being served by the access point. Then, we ...

The Session Initiation Protocol (SIP) is a popular application-level signaling protocol that is used for a wide variety of applications such as session control and mobility handling. In some of these applications, the exchange of SIP messages is time-...

In this paper, we propose a practical implementation of network-adaptive HD (high definition) MPEG-2 streaming using frame-based prioritized packetization over the IEEE 802.11a WLAN (wireless local area network). The proposed adaptive streaming system ...

Mobile devices, like PDAs or smart phones, exhibit limited capabilities in terms of processing power and memory. Supported by advanced WLAN hotspot grid infrastructures, mobile terminals may enhance their computing capabilities significantly by ...

This paper proposes a practical scheme to run the care-of address test (part of the Return Routability test for Mobile IPv6 route optimization) in a proactive way in the context of the Fast Handovers for Mobile IPv6 (FMIPv6) protocol, so that the latency ...

Sizing of IEEE 802.11 wireless LANs (WLANs), defined as the problem of finding the maximum number of users that can be supported, is essential for efficient application performance over WLANs. The usage of existing analytical models of 802.11 MAC in ...

The unprecedented proliferation of wireless networking services and products has taken the notion of hotspots a step further to accommodate "mobile hotspots". The deployment of hotspots in trains, ships, planes, buses etc. would certainly change the way ...

A new service model of public wireless Internet access, called autonomous distributed public wireless Internet access, is presented. In the service model any volunteer with broadband Internet access lines can provide his access points for public service ...

Achieving a fine-scalable and channel-adaptive speech coding scheme to provide reliable voice communication in wireless IP networks is an important challenge that opens new directions for research. In this proposal we review the problems and issues in ...

Personal Networks (PN) is a new concept related to pervasive computing with a strong user-focus view. The key to a successful PN realization is a general network architecture that is capable of bridging different current and future technologies and ...