G. Riva

Clinica Mediterranea

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M. Frullone

Fondazione "Ugo Bordoni"

G. Falciasecca

University of Bologna

P. Grazioso

Fondazione "Ugo Bordoni"

Claudia Carciofi

Fondazione "Ugo Bordoni"

C. Passerini

University of Ferrara

Vittorio Degli‐Esposti

University of Bologna

A. Cruz Serra

University of Pisa

M. Missiroli

Fondazione "Ugo Bordoni"

Marina Barbiroli

University of Bologna

Doriana Guiducci

European Environment Agency

Cooperative Institutions

University of Bologna

Fondazione "Ugo Bordoni"

Laboratori Guglielmo Marconi (Italy)

Marconi University

University of Pisa

University of Catania

Consorzio Nazionale Interuniversitario per le Telecomunicazioni

University of Milan

University of Insubria

Istituto Nazionale di Fisica Nucleare, Sezione di Trieste

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Packet reservation multiple access in cellular environments

European Transactions on Telecommunications (1994)

Frullone G. Riva P. Grazioso Claudia Carciofi

Abstract Some different packet protocols, based on a Reservation ALOHA protocol, have been proposed in literature for use in mobile radio systems, even though their performance have been fully evaluated only in interference free environments. The paper focuses on Packet Reservation Multiple Access (PRMA) and extends the evaluation of its performance to a cellular environment, first by characterising its performance when loaded by a Poisson traffic distribution and then assessing the impact of interference from other cells.

Aloha

10.1002/ett.4460050111

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Citations (9)

On the performance of packet reservation multiple access with fixed and dynamic channel allocation

IEEE Transactions on Vehicular Technology (1993)

M. Frullone G. Falciasecca P. Grazioso G. Riva A. Cruz Serra

The evaluation of packet reservation multiple access (PRMA) is extended from a single cell case, investigated in several previous papers, to a cellular environment characterized by user mobility and by the interference from other cells. The analysis is based on a comparison of PRMA performances with those of classical circuit switching schemes. The comparison methodology is defined, and the comparison, performed by means of a simulation program based on a dynamic traffic model, is discussed.< >

Channel allocation schemes

Packet Switching

10.1109/25.192390

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Citations (37)

Comparisons of multiple access schemes for personal communication systems in a mixed cellular environment

IEEE Transactions on Vehicular Technology (1994)

M. Frullone G. Riva P. Grazioso M. Missiroli

The paper deals with the evaluation of performances of packet reservation multiple access (PRMA) and code division multiple access (CDMA) in a mixed cellular environment, composed by a regular grid of macrocells plus microcells deployed in the most congested areas. The investigation aims at evaluating the impact of the different interference mechanisms on traffic performance and bases on the comparison between two technical solutions proposed in literature. The approach is quite innovative since the analysis is carried out considering realistic spatial traffic statistics, which are characterized, even with a nominally uniform user distribution, by fluctuations resulting in uneven traffic loads on different cells. Different propagation models for macrocells and microcells have been adopted.< >

10.1109/25.282270

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Citations (34)

Performance evaluation of space diversity in indoor communications using a ray-tracing propagation model

Giovanni Emanuele Corazza Vittorio Degli‐Esposti M. Frullone C. Passerini G. Riva

Future wireless personal communications will find important applications in indoor environments; hence, an accurate analysis of the propagation characteristics within buildings and their impact on system design parameters is highly desirable. The performance of space diversity techniques in an indoor environment is investigated. Three linear signal combining techniques are considered: signal selection, maximal ratio combining and equal gain combining. The calculation of received fading envelope in the environment has been performed by using a 3D ray-tracing/UTD technique. The obtained results show the very significant benefits that can be achieved both in terms of diversity gain and diversity advantage, as well as the good agreement with the general achievements of previous experimental works.

Diversity gain

Antenna diversity

Envelope (radar)

SIGNAL (programming language)

Diversity scheme

10.1109/pimrc.1995.480901

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Citations (3)

Gaussian Wide Sense Stationary Uncorrelated Scattering (GWSSUS) channel simulation program to be used for mobile radio systems

STIN (1983)

G. Falciasecca G. Riva

Uncorrelated

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Citations (0)

Analysis of coexistence and mutual interference between mobile and digital television systems - Análisis sobre coexistencia e interferencia mutua entre los sistemas móviles y la televisión digital

Alessandro Guidotti P. Grazioso Marina Barbiroli Claudia Carciofi Doriana Guiducci

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Comparison of different hand-over strategies for high capacity cellular mobile radio systems

G. Falciasecca M. Frullone G. Riva A. Cruz Serra

Preliminary results are presented for a computer program, which has already been used for spectrum efficiency evaluations, that starting from a dynamic traffic model gives interesting information on system performance when different hand-over criteria are used. The proposed simulation program is able to evaluate hand-over characteristics for strategies based on field strength, distance, and C/I (carrier/interference ratio). A detailed definition of the mobile ratio scenario in which the program will operate is presented.< >

10.1109/vetec.1989.40060

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Citations (13)

The influence of knee joint angle and time of force application on vertical jump height during volleyball commit-block

G. Riva Alessio Rossi Luca Bonfanti Damiano Formenti G. Alberti

Commit

Vertical jump

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Adaptive antenna arrays for reducing the delay spread in indoor radio channels

Electronics Letters (1996)

C. Passerini M. Missiroli G. Riva M. Frullone

The performance in terms of channel delay-spread reduction resulting from the use of adaptive antenna arrays are evaluated in a typical indoor environment. The propagation channel is simulated by means of a 3-D ray-tracing programme. The impact of the geometric structure of the arrays as well as of the system bit-rate is discussed.

Radio channel

10.1049/el:19960191

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Citations (12)

Optimizing TCP Performance Through Joint Channel Coding and Power Management in Power Constrained Satellite Networks

Laura Galluccio Giacomo Morabito Sergio Palazzo Matteo Berioli G. Riva

In this paper an analytical framework is introduced for the optimization of TCP performance through joint channel coding and transmission power management in satellite communications, where both energy and bandwidth are scarce and costly resources. More specifically, the analysis takes into account the use of Low-Density Parity-Check (LDPC) codes as coding scheme for high data rate satellite communications. The analytical framework allows for the evaluation of the transmission power and coding rate that maximize the TCP throughput per unitary cost, which is a metric defined in terms of energy cost and bandwidth cost when related to throughput. Numerical examples demonstrate the usability of the proposed framework.

Communications satellite

Performance metric

10.1109/glocom.2008.ecp.561

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Citations (2)