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4 results on '"adaptive packet size"'

2. A cross-layer adaptive transmission scheme combined with SR-ARQ over correlated fading channels

Author

Xiao, Junfeng, Zou, Shihong, Qiu, Jing, and Cheng, Shiduan

Subjects
*MARKOV processes, *BLOCKING (Meteorology), *ABSTRACTING, *COMPUTER science
Abstract

Abstract: Current adaptive transmission schemes all assume independent block fading. However, in slow fading channels, it is highly possible for consecutive block transmissions to be correlated. In this paper, we propose a cross-layer adaptive transmission scheme, which is an optimum combination of modulation format and packet size, combined with selective repeat automatic repeat request (SR-ARQ) to improve the throughput in correlated slow fading channels. We apply a multi-state Markov system model to analyze the system performance and to optimize the selection of modulation levels at the physical layer and packet sizes at the data link layer in a correlated slow fading channel, which is also described by a finite-state Markov chain. A general closed-form expression of the average throughput for this cross-layer adaptive transmission scheme is presented. Simulation results show that our adaptive transmission scheme combined with SR-ARQ can obtain a good performance in correlated slow fading channels. [Copyright &y& Elsevier]

Published
2008
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3. An algorithm for controlling packet size in IEEE 802.16e networks

Author

Cosimo Palazzo, Giovanni Ciccarese, Luigi Patrono, Pierluigi Marra, Mario De Blasi, Ciccarese, Giovanni, Mario De, Blasi, Marra, Pierluigi, Palazzo, Cosimo, and Patrono, Luigi

Subjects
IEEE 802, Markov chain, ARQ efficiency, Computer Networks and Communications, Network packet, Computer science, business.industry, Automatic repeat request, ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, Link adaptation, Data_CODINGANDINFORMATIONTHEORY, Network allocation vector, IEEE 802.16e, Computer Science::Performance, Selective Repeat ARQ, Adaptive packet size, Computer Science::Networking and Internet Architecture, Wireless, business, Algorithm, Computer Science::Information Theory, Communication channel, Computer network
Abstract

This paper proposes an algorithm to be used in IEEE 802.16e networks for adapting MAC PDU size to wireless channel behavior when ARQ is adopted at MAC layer. The algorithm is based on an analytical approach for dynamically evaluating the optimal packet size. The latter is derived from an expression of the ARQ protocol efficiency, obtained by exploiting a finite-state Markov error model which also takes into account Adaptive Modulation/Coding. The effectiveness of the designed algorithm in improving TCP performance has been evaluated.

Published
2011

4. A packet size control algorithm for IEEE 802.16e

Author

Cosimo Palazzo, Giovanni Ciccarese, Luigi Patrono, Pierluigi Marra, M. De Blasi, Ciccarese, Giovanni, DE BLASI, Mario, P., Marra, C., Palazzo, and Patrono, Luigi

Subjects
IEEE 802, ARQ efficiency, business.industry, Computer science, Network packet, Automatic repeat request, Real-time computing, ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, Markov process, Link adaptation, IEEE 802.16e, Selective Repeat ARQ, symbols.namesake, Adaptive coding, Sliding window protocol, Wireless lan, Computer Science::Networking and Internet Architecture, symbols, Wireless, adaptive packet size, business, Algorithm, Communication channel
Abstract

This paper proposes a novel algorithm which enables an ARQ protocol defined for IEEE 802.16e to vary the packet size depending on wireless channel behaviour. The algorithm adopts an analytical approach for dynamically evaluating the optimal packet size. The latter is derived from an expression of the ARQ protocol efficiency, obtained by exploiting a finite-state Markov error model which also considers Adaptive Modulation/Coding. The effectiveness of the designed algorithm in improving TCP performance has been evaluated.

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