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Träfflista för sökning "LAR1:hh srt2:(2005-2009);pers:(Vinel Alexey 1983)"

Sökning: LAR1:hh > (2005-2009) > Vinel Alexey 1983

  • Resultat 1-10 av 29
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2.
  • Andreev, Sergey, et al. (författare)
  • Contention-Based Polling Efficiency in Broadband Wireless Networks
  • 2008
  • Ingår i: Analytical and Stochastic Modeling Techniques and Applications. - Berlin : Springer Berlin/Heidelberg. - 9783540689805 - 9783540689829 - 354068980X ; , s. 295-309
  • Konferensbidrag (refereegranskat)abstract
    • This paper addresses the performance of the contention-based polling techniques at the bandwidth reservation stage of IEEE 802.16 standard. A general proposition is proved, which establishes that the grouping of users in the random multiple access system does not change its capacity. Broadcast and multicast polling mechanisms are then considered, for which the throughput and the rate of the truncated binary exponential backoff algorithm are calculated for the lossy and the lossless system types, respectively. It is shown, that subject to proper optimization the performance of the aforementioned algorithm is the same for both system types. The efficiency of the symmetric user grouping is finally studied, which demonstrates that a negligible performance gain may be achieved for the cost of the increased IEEE 802.16 overhead.
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3.
  • Andreev, Sergey D., et al. (författare)
  • Performance analysis and enhancement of an ultra-wideband WPAN MAC in the presence of noise
  • 2007
  • Ingår i: XI International Symposium on Problems of Redundancy in Information and Control Systems. - Saint Petersburg. ; , s. 117-122
  • Konferensbidrag (refereegranskat)abstract
    • This paper addresses the performance evaluation of the contemporary UWB WPAN standard. The basic standard functionality is described for which a system model is derived that accounts for the possible errors due to the background noise. Two realistic scenarios of the saturation conditions and the Bernoulli packet arrivals are considered to calculate the system throughput and the mean initial packet delay. The redundancy-based error detection mechanism that is implemented in the standard is discussed that allows the enhancement of the system performance. The obtained results are compared against the simulation which shows a good accordance with the analytical results and a distinct superiority of the introduced enhancement.
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4.
  • Andreev, Sergey D., et al. (författare)
  • Performance analysis of a high-speed ultra-wideband WPAN MAC
  • 2007
  • Ingår i: Proceedings of the 14th International Conference on Analytical and Stochastic Modelling Techniques and Applications. - Sbr.-Dudweiler : Digitaldruck Pirrot GmbH. - 095530184X - 9780955301841 ; , s. 44-49
  • Konferensbidrag (refereegranskat)abstract
    • The current paper addresses the problem of the throughput-delay performance of a contemporary WPAN MAC standard. A brief overview of the standard functionality is first presented that allows a system model derivation. Two different acknowledgement policies are described under which the channel operation is considered. Two possible input traffic models are also considered one of them being saturation conditions under which the performance analysis is done that is further verified by means of the simulation. The obtained results show the system behavior as the number of channel users increase and allow the tuning of the protocol parameters to improve the performance.
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7.
  • Andreev, Sergey, et al. (författare)
  • Symmetric User Grouping for Multicast and Broadcast Polling in IEEE 802.16 Networks
  • 2008
  • Ingår i: Selected Lectures on Multiple Access and Queueing Systems. - Saint-Petersburg : Saint-Petersburg State University of Aerospace Instrumentation. - 9785808803442 ; , s. 52-62
  • Konferensbidrag (refereegranskat)abstract
    • In this paper we address the bandwidth reservation in IEEE 802.16 standard via multicast and broadcast polling mechanisms. It is shown that symmetric user grouping with the same QoS requirements does not change the capacity of the random multiple access system. Binary exponential backoff protocol is then investigated as it is standardized for both multicast and broadcast polling. We establish that symmetric user grouping does not essentially increase the performance of this protocol.
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9.
  • Kobliakov, Vladimir, et al. (författare)
  • Distributed Queue Random Multiple Access Algorithm for Centralized Data Networks
  • 2006
  • Ingår i: Consumer Electronics, 2006. ISCE '06. 2006 IEEE Tenth International Symposium on. - Piscataway : IEEE Press. - 1424402158 - 1424402166 - 9781424402168 ; , s. 290-295
  • Konferensbidrag (refereegranskat)abstract
    • The development of efficient media access control protocols for new generation networks, such as IEEE 802.16 metropolitan wireless system, is a challenging task nowadays. The problem of designing an efficient random multiple access algorithm for centralized data network, where subscriber stations transmit bandwidth requests to the base station in an uplink channel, is a focus of the paper. For this purpose special model for a centralized network is considered and new random multiple access algorithm is developed and analyzed. This algorithm, further referred to as distributed queue algorithm (multi-FS-ALOHA), is shown to provide higher tenacity and lower mean delay for the request transmission in comparison to binary exponential backoff, standardized in IEEE 802.16, as well as FS-ALOHA it is based on. Optimization of parameters for the developed algorithm is fulfilled; impact of the noise on its performance is investigated. The analysis is conducted by means of both analytical techniques and simulations
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10.
  • Lott, Matthias, et al. (författare)
  • Propagation Modeling for Systems Beyond 3G
  • 2005
  • Ingår i: Proceedings of International Symposium on Wireless Personal Multimedia Communications. - Aalborg : Aalborg Universitetsforlag. - 8790834798 ; , s. 1838-1842
  • Konferensbidrag (refereegranskat)abstract
    • Introducing multi-hop (MH) and time division duplex (TDD) in high-speed wireless communication systems arise in challenges for system simulations, specifically in radio propagation modeling. In this paper a new propagation model is presented for systems B3G that make use of MH and TDD. The model is typically suited for urban and sub-urban scenarios with streets and many buildings where line-of-sight (LoS) and non-LoS (NLoS) conditions have to be distinguished. Different to conventional propagation models the new model reduces the required memory considerably. Instead of an exponential increase in the required storage space with the size of the scenario, the storage space increases only linearly when applying the new model, which is based on the idea to distinguish between LoS and NLoS conditions. © 2005 WPMC
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  • Resultat 1-10 av 29

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