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There are several QoS technologies available for an Internet Service Provider to manage Guaranteed Performance Services in a telecommunication network. The study of the possible interactions between different QoS technologies is currently an open area of research often called, in the literature, QoS mapping. A QoS mapping problem arises when different(More)
—In this paper, the IEEE 802.16 protocol is investigated with respect to the bandwidth provision problem arising at the Medium Access Control (MAC) layer. The aim is to optimally tune the resource allocation to match QoS requirements. Traffic flows are originated at network layers overlying the 802.16 protocol stack. This leads to the investigation of a(More)
— The reference network is composed of a group of wireless sensors directly in view of a Cluster of Satellite Earth Stations (CoSES), which convey the information coming from the sensors to a destination Remote Monitoring Host (RMH). More than one Satellite Earth Station (SES), all in this letter, within the cluster receive the information packets but to(More)
SUMMARY Designing efficient transmission mechanisms for advanced satellite networks is a demanding task, requiring the definition and the implementation of protocols and architectures well suited to this challenging environment. In particular, transport protocols performance over satellite networks is impaired by the characteristics of the satellite radio(More)
| Satellite communications are characterized by long delays, packet losses, and sometimes intermittent con-nectivity and link disruptions. The TCP/IP stack is ineffective against these impairments and even dedicated solutions, such as performance enhancing proxies (PEPs), can hardly tackle the most challenging environments, and create compatibility issues(More)
The increasing demand for a variety of new Internet services with diierent and possibly stringent QoS requirements (i.e. Internet Tele-phony, videoconferencing etc.) requires the design of mechanisms to support QoS guarantees. The current solutions proposed in IETF, RSVP (Resource reSerVation Protocol) and Diierentiated Services, though suitable for many(More)
—This paper considers a packet-based telecommunica-tion network architecture suited to be used as an Environmental Monitoring System (EMS) over wide areas. It can be employed to retrieve the measures of physical quantities, such as temperature, humidity, and vibrations intensity (physical information) together with the geographical position where the(More)
This paper presents a Speaker Count (SC) algorithm based on pitch estimation designed to recognize singlespeaker audio recordings from two-speaker recordings. The paper reports the implementation for Symbian OS smartphones. The proposed solution is aimed at limiting implementation complexity and related battery consumption with respect to the schemes(More)