We envision an environment where humans communicate directly with computers without additional authentication inputs like passwords, passphrases, PINs (Personal Identification Numbers), biometrics, or other existent authentication systems; and where humans network (intercommunicate) continually with wireless (mobile) devices. In this paper, we propose a new mobile authentication system, not yet...

We envision an environment where humans communicate directly with computers without additional authentication inputs like passwords, passphrases, PINs (Personal Identification Numbers), biometrics, or other existent authentication systems; and where humans network (intercommunicate) continually with wireless (mobile) devices. In this paper, we propose a new mobile authentication system, not yet...

In this paper, we investigate the applicability of the Pragmatic General Multicast Congestion Control (pgmcc) scheme to the multicast data delivery over Universal Mobile Telecommunications System (UMTS) networks. We show that the pgmcc scheme cannot support the degradation of the radio channels in the UMTS Terrestrial Radio-Access Network (UTRAN). Our major contribution is that the legacy schem...

This paper presents research-in-progress on the development of a home security system for use on mobile devices. Mobile Home Security (MHS) is a system that uses the wireless high-speed technology GPRS. An effective system requires the delivery of good quality images and video to the mobile device. Existing wireless networks have low bandwidth and hence are not capable of providing this service...

The detailed knowledge of the directional characteristics of the mobile radio channel is required to develop directional channel models and to design efficient smart antenna concepts for future mobile radio systems. In this paper, we examine the applicability and performance of two popular high-resolution parameter estimation schemes for directional channel sounding, namely subspace-based Unita...

Location estimation in Wireless networks has become an important feature for improvement in public safety service. Its potential applications include location sensitive billing, asset tracking, fraud protection, mobile yellow pages, fleet management, etc. Several location techniques using terrestrial wireless network elements and radio signals have been proposed over the years, but multipath pr...

In this paper, the Wireless Application Protocol (WAP) as one application of mobile data services is examined with the aim to give guidelines for the dimensioning of next generation mobile radio networks. The performance of WAP-based applications over GPRS is evaluated in scenarios where the GPRS radio resources are shared with conventional Internet applications like WWW and e-mail. Simulation ...

Emerging standardization of Geo Mobile Radio (GMR-1) for satellite system is having strong resemblance to terrestrial GSM (Global System for Mobile communications) at the upper protocol layers and TCP (Transmission Control Protocol) is one of them. This space segment technology as well as terrestrial technology, is characterized by periodic variations in communication properties and coverage ca...

The Wireless Application Protocol (WAP) as one application of mobile data services is examined with the aim to provide guidelines for the dimensioning of next generation mobile radio networks. The performance of WAP-based applications over GPRS is evaluated in scenarios where the GPRS radio resources are shared with conventional Internet applications like WWW and e-mail. Simulation results for ...

Mobile radio systems for public safety and agencies engaged in emergency response and disaster recovery operations must support multicast voice traffic. In this paper, we analyze the distribution of call inter-arrival and call holding times for multicast voice (talk group) traffic on a transmission trunked mobile radio system. In such systems, the channel is held only while a user is making a c...