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Wireless Networks
Erschienen in: Wireless Networks 4/2014

01.05.2014

Performance analysis of wireless multi-user VoIP system with adaptive modulation and coding

verfasst von: Howon Lee, Soobin Lee, Dong-Ho Cho

Erschienen in: Wireless Networks | Ausgabe 4/2014

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Abstract

In this paper, we propose a new framework to analyze performance considering finite-length queuing and adaptive modulation and coding for multi-user Voice over IP (VoIP) services in wireless communication systems. We formulate an uplink VoIP system as a two-dimensional discrete-time Markov chain (DTMC) based on a Markov modulated Poisson process traffic model for VoIP services and modulation and coding scheme (MCS)-level set transition reflecting users’ channel variations. We extend the transition modeling of the MCS-level for a single-user to the transition modeling of the MCS-level set for multiple users. Since the users can have various MCS combinations in the case of a multi-user system, the MCS-level set transitions are more complicated than the MCS-level transitions of the single-user case. Throughout our DTMC formulation, we present various performance metrics, such as average queue-length, average throughput, packet dropping probability, packet loss probability, and so on. By using the results of the packet loss probability, we can find an optimum packet error rate value that minimizes the total packet loss probability.
Vorheriger Artikel A fully distributed replica allocation scheme for an opportunistic network
Nächster Artikel A new technique for multi-cell joint channel estimation in time division code division multiple access based on reduced rank singular value decomposition

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Fußnoten
1
The IEEE 802.16e/m system denotes a bandwidth request process for data transmission as a polling process.
 
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Metadaten
Titel
Performance analysis of wireless multi-user VoIP system with adaptive modulation and coding
verfasst von
Howon Lee
Soobin Lee
Dong-Ho Cho
Publikationsdatum
01.05.2014
Verlag
Springer US
Erschienen in
Wireless Networks / Ausgabe 4/2014
Print ISSN: 1022-0038
Elektronische ISSN: 1572-8196
DOI
https://doi.org/10.1007/s11276-013-0638-1

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