Dr Mehrdad Dianati

Lecturer (Assistant Professor) in Communication Systems

Qualifications: PhD

Email:
Phone: Work: 01483 68 3469
Room no: 14 BA 02

Further information

Biography

I received my B.Sc. and MSc. degrees in Electrical Engineering from Sharif University of Technology and K.N.T University of Technology (Tehran, Iran), and my Ph.D. degree in Electrical and Computer Engineering from the University of Waterloo, Waterloo, ON, Canada in 2006. I worked as a Hardware/Software Developer and Technical Manager for several years from 1992 to 2002. I am currently a Lecturer (Assistant Professor) with the Centre for Communication Systems Research (CCSR), Department of Electronic Engineering, University of Surrey, in U.K. I also serve as the Associate Editor for the following journals: EEE Transactions on Vehicular Technology; IET Communications; Wiley's Journal of Wireless Communications and Mobile Computing.

Publications

Highlights

  • Dianati M, Tafazolli R, Shen XS, Naik K. (2010) 'Call admission control with opportunistic scheduling scheme'. JOHN WILEY & SONS INC WIRELESS COMMUNICATIONS & MOBILE COMPUTING, 10 (3), pp. 372-382.
    doi: 10.1002/wcm.771
    Full text is available at: http://epubs.surrey.ac.uk/712456/
  • Peev M, Pacher C, Alleaume R, Barreiro C, Bouda J, Boxleitner W, Debuisschert T, Diamanti E, Dianati M, Dynes JF, Fasel S, Fossier S, Fuerst M, Gautier J-D, Gay O, Gisin N, Grangier P, Happe A, Hasani Y, Hentschel M, Huebel H, Humer G, Laenger T, Legre M, Lieger R, Lodewyck J, Loruenser T, Luetkenhaus N, Marhold A, Matyus T, Maurhart O, Monat L, Nauerth S, Page J-B, Poppe A, Querasser E, Ribordy G, Robyr S, Salvail L, Sharpe AW, Shields AJ, Stucki D, Suda M, Tamas C, Themel T, Thew RT, Thoma Y, Treiber A, Trinkler P, Tualle-Brouri R, Vannel F, Walenta N, Weier H, Weinfurter H, Wimberger I, Yuan ZL, Zbinden H, Zeilinger A. (2009) 'The SECOQC quantum key distribution network in Vienna'. IOP PUBLISHING LTD NEW JOURNAL OF PHYSICS, 11 Article number ARTN 075001
    doi: 10.1088/1367-2630/11/7/075001
  • Dianati M, Alleaume R, Gagnaire M, Shen XS. (2008) 'Architecture and protocols of the future European quantum key distribution network'. JOHN WILEY & SONS LTD SECURITY AND COMMUNICATION NETWORKS, 1 (1), pp. 57-74.
    doi: 10.1002/sec.13

Journal articles

  • Han C, Dianati M, Tafazolli R, Liu X, Shen X. (2012) 'A novel distributed asynchronous multichannel mac scheme for large-scale vehicular ad hoc networks'. IEEE Transactions on Vehicular Technology, 61 (7), pp. 3125-3138.
    doi: 10.1109/TVT.2012.2205596
    Full text is available at: http://epubs.surrey.ac.uk/736918/

    Abstract

    This paper proposes a novel distributed asynchronous multichannel medium access control (MAC) scheme for large-scale vehicular ad hoc networks (VANETs), i.e., asynchronous multichannel medium access control with a distributed time-division multiple-access mechanism (AMCMAC-D). The proposed scheme supports simultaneous transmissions on different service channels while allowing rendezvous and broadcast of emergency messages on the control channel. The scheme is distributed, because it handles access to the shared control channel for different access categories without relying on the beacon frames from roadside units. This condition eliminates the overhead that is associated with channel allocation, making the proposed scheme suitable for large-scale networks in terms of the number of active nodes. Service differentiation in the proposed scheme is enhanced by allocating different numbers of time slots for different access categories. We compare the performance of the proposed scheme with the IEEE 1609.4 standard and the asynchronous multichannel Coordination Protocol (AMCP) in terms of throughput, packet delivery rate, collision rate, utilization of service channels, service differentiation, and the penetration rate of noncollided emergency messages. The results show that AMCMAC-D outperforms the IEEE 1609.4 standard and AMCP in terms of system throughput by increasing the utilization of the control channel and service channels. The proposed scheme also demonstrates better performance in terms of packet delivery rate, collision rate on a service channel, load balancing, and service differentiation. Finally, AMCMAC-D mitigates the multichannel hidden terminal and missing receiver problems, which occur in asynchronous multichannel MAC schemes. © 1967-2012 IEEE.

  • Taghiyar MJ, Muhaidat S, Liang J, Dianati M. (2012) 'Relay selection with imperfect CSI in bidirectional cooperative networks'. IEEE Communications Letters, 16 (1), pp. 57-59.
    doi: 10.1109/LCOMM.2011.111011.111774
  • Han C, Dianati M, Tafazolli R, Kernchen R, Shen X. (2012) 'Analytical study of the IEEE 802.11p MAC sublayer in vehicular networks'. IEEE IEEE Transactions on Intelligent Transportation Systems, 13 (2), pp. 873-886.
    doi: 10.1109/TITS.2012.2183366
    Full text is available at: http://epubs.surrey.ac.uk/712458/

    Abstract

    This paper proposes an analytical model for the throughput of the enhanced distributed channel access (EDCA) mechanism in the IEEE 802.11p medium-access control (MAC) sublayer. Features in EDCA such as different contention windows (CW) and arbitration interframe space (AIFS) for each access category (AC) and internal collisions are taken into account. The analytical model is suitable for both basic access and the request-to-send/clear-to-send (RTS/CTS) access mode. Different from most of existing 3-D or 4-D Markov-chain-based analytical models for IEEE 802.11e EDCA, without computation complexity, the proposed analytical model is explicitly solvable and applies to four access categories of traffic in the IEEE 802.11p. The proposed model can be used for large-scale network analysis and validation of network simulators under saturated traffic conditions. Simulation results are given to demonstrate the accuracy of the analytical model. In addition, we investigate service differentiation capabilities of the IEEE 802.11p MAC sublayer. © 2011 IEEE.

  • Katsaros K, Kernchen R, Dianati M, Rieck D, Zinoviou C. (2011) 'Application of vehicular communications for improving the efficiency of traffic in urban areas'. Wiley Wireless Communications and Mobile Computing, 11 (12), pp. 1657-1667.
    doi: 10.1002/wcm.1233
    Full text is available at: http://epubs.surrey.ac.uk/712454/

    Abstract

    This paper studies the impacts of vehicular communications on efficiency of traffic in urban areas. We consider a Green Light Optimized Speed Advisory application implementation in a typical reference area and present the results of its performance analysis using an integrated cooperative intelligent transportation systems simulation platform. In addition, we study route alternation using vehicle-to-infrastructure and vehicle-to-vehicle communications. Our interest was to monitor the impacts of these applications on fuel and traffic efficiency by introducing metrics for average fuel consumption, average stop time behind a traffic light and average trip time, respectively. For gathering the results, we implemented two traffic scenarios defining routes through an urban area including traffic lights. The simulations are varied for different penetration rates of application-equipped vehicles, driver's compliance to the advised speed and traffic density. Our results indicate that Green Light Optimized Speed Advisory systems could improve fuel consumption, reduce traffic congestion in junctions and the total trip time

  • Akbari A, Imran MA, Tafazolli R, Dianati M. (2011) 'Energy Efficiency Contours for Single-Carrier Downlink Channels'. IEEE COMMUNICATIONS LETTERS, 15 (12), pp. 1307-1309.
    doi: 10.1109/LCOMM.2011.103111.111519
    Full text is available at: http://epubs.surrey.ac.uk/710809/
  • Taghiyar MJ, Muhaidat S, Liang J, Dianati M. (2011) 'Relay Selection with Imperfect CSI in Bidirectional Cooperative Networks'. IEEE COMMUNICATIONS LETTERS, 16 (1), pp. 57-59.
    doi: 10.1109/LCOMM.2011.111011.111774
  • Seyfi M, Muhaidat S, Liang J, Dianati M. (2011) 'Effect of Feedback Delay on the Performance of Cooperative Networks with Relay Selection'. IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 10 (12), pp. 4161-4171.
    doi: 10.1109/TWC.2011.101711.100901
  • Dianati M, Tafazolli R, Shen XS, Naik K. (2010) 'Call admission control with opportunistic scheduling scheme'. JOHN WILEY & SONS INC WIRELESS COMMUNICATIONS & MOBILE COMPUTING, 10 (3), pp. 372-382.
    doi: 10.1002/wcm.771
    Full text is available at: http://epubs.surrey.ac.uk/712456/
  • Dianati M, Tafazolli R, Shen X, Naik K. (2010) 'Per-user service model for opportunistic scheduling scheme over fading channels'. JOHN WILEY & SONS INC WIRELESS COMMUNICATIONS & MOBILE COMPUTING, 10 (1), pp. 87-100.
    doi: 10.1002/wcm.910
    Full text is available at: http://epubs.surrey.ac.uk/712455/

    Abstract

    In this paper, we propose a ¯nite-state Markov model for per-user service of an oppor- tunistic scheduling scheme over Rayleigh fading channels, where a single base station serves an arbitrary number of users. By approximating the power gain of Rayleigh fading chan- nels as ¯nite-state Markov processes, we develop an algorithm to obtain dynamic stochastic model of the transmission service, received by an individual user for a saturated scenario, where user data queues are highly loaded. The proposed analytical model is a ¯nite-state Markov process. We provide a comprehensive comparison between the predicted results by the proposed analytical model and the simulation results, which demonstrate a high degree of match between the two sets.

  • Peev M, Pacher C, Alleaume R, Barreiro C, Bouda J, Boxleitner W, Debuisschert T, Diamanti E, Dianati M, Dynes JF, Fasel S, Fossier S, Fuerst M, Gautier J-D, Gay O, Gisin N, Grangier P, Happe A, Hasani Y, Hentschel M, Huebel H, Humer G, Laenger T, Legre M, Lieger R, Lodewyck J, Loruenser T, Luetkenhaus N, Marhold A, Matyus T, Maurhart O, Monat L, Nauerth S, Page J-B, Poppe A, Querasser E, Ribordy G, Robyr S, Salvail L, Sharpe AW, Shields AJ, Stucki D, Suda M, Tamas C, Themel T, Thew RT, Thoma Y, Treiber A, Trinkler P, Tualle-Brouri R, Vannel F, Walenta N, Weier H, Weinfurter H, Wimberger I, Yuan ZL, Zbinden H, Zeilinger A. (2009) 'The SECOQC quantum key distribution network in Vienna'. IOP PUBLISHING LTD NEW JOURNAL OF PHYSICS, 11 Article number ARTN 075001
    doi: 10.1088/1367-2630/11/7/075001
  • Dianati M, Alleaume R, Gagnaire M, Shen XS. (2008) 'Architecture and protocols of the future European quantum key distribution network'. JOHN WILEY & SONS LTD SECURITY AND COMMUNICATION NETWORKS, 1 (1), pp. 57-74.
    doi: 10.1002/sec.13
  • Dianati M, Shen XS, Naik K. (2007) 'Scheduling with base station diversity and fairness analysis for the downlink of CDMA cellular networks'. JOHN WILEY & SONS INC WIRELESS COMMUNICATIONS & MOBILE COMPUTING, 7 (5), pp. 569-579.
    doi: 10.1002/wcm.372
  • Alleaume R, Bouda J, Branciard C, Debuisschert T, Dianati M, Gisin N, Godfrey M, Grangier P, Langer T, Leverrier A, Lutkenhaus N, Painchault P, Peev M, Poppe A, Pornin T, Rarity J, Renner R, Ribordy G, Riguidel M, Salvail L, Shields A, Weinfurter H, Zeilinger A. (2007) 'SECOQC White Paper on Quantum Key Distribution and Cryptography'. ArXiv,
  • Dianati M, Alleaume R. (2006) 'Architecture of the Secoqc Quantum Key Distribution network'. First International Conference on Quantum, Nano, and Micro Technologies,
    [ Status: Unpublished ]
  • Dianati M, Ling XH, Naik K, Shen XS. (2006) 'A node-cooperative ARQ scheme for wireless ad hoc networks'. IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, 55 (3), pp. 1032-1044.
    doi: 10.1109/TVT.2005.863426

Conference papers

  • Jiang J, Dianati M, Imran M, Chen Y. (2012) 'Energy Efficiency and Optimal Power Allocation in Virtual-MIMO Systems'. Quebec City, Canada: 2012 IEEE 76th Vehicular Technology Conference: VTC2012-Fall, pp. 1-6.
    doi: 10.1109/VTCFall.2012.6399002
    Full text is available at: http://epubs.surrey.ac.uk/726221/

    Abstract

    This paper investigates energy efficiency (EE) performance of a virtual multiple-input multiple-output (MIMO) wireless system using the receiver-side cooperation with the compress-and-forward protocol. We derive a linear approximation of EE as a function of spectral efficiency (SE) in the low SE operation regime. In addition, we obtain a closed-form lower bound for EE which is valid for both low and high SE regions. This lower bound can be used for optimizing the power allocation between the transmitter and the relay in order to minimize the overall energy per bit consumption in the system. Both analytical and simulation results demonstrate that the virtual MIMO system using the receiver-side cooperation outperforms the multiple-input single-output (MISO) case in terms of energy efficiency. Finally we show that, with the optimal power allocation, the virtual-MIMO system achieves an EE performance close to that of an ideal MIMO system.

  • Han C, Dianati M, Tafazolli R, Kernchen R. (2011) 'Asynchronous multi-channel MAC for vehicular ad hoc networks'. IEEE IEEE Vehicular Networking Conference, VNC, IEEE Vehicular Networking Conference, VNC 2011, pp. 109-115.
    doi: 10.1109/VNC.2011.6117131
    Full text is available at: http://epubs.surrey.ac.uk/736922/

    Abstract

    This paper presents a new multi-channel MAC protocol for Vehicular Ad Hoc Networks, namely, Asynchronous Multi-Channel MAC (AMCMAC). The AMCMAC supports simultaneous transmissions on different service channels, as well as, allowing other nodes to make rendezvous with their provider/receiver or broadcast emergency messages on the control channel. We compare the performance of the proposed protocol with that of IEEE 1609.4 and Asynchronous Multichannel Coordination Protocol (AMCP), in terms of throughput on control and service channels, channel utilization, and the penetration rate of successfully broadcast emergency messages. We demonstrate that AMCMAC outperforms IEEE 1609.4 and AMCP in terms of system throughput by increasing the utilization of control channel and service channels. In addition, AMCMAC mitigates both the multi-channel hidden terminal and missing receiver problems which occur in asynchronous multichannel MAC protocols. © 2011 IEEE.

  • Katsaros K, Dianati M, Tafazolli R, Kernchen R. (2011) 'CLWPR - A novel cross-layer optimized position based routing protocol for VANETs'. IEEE IEEE Vehicular Networking Conference, VNC, Amsterdam: 2011 IEEE Vehicular Networking Conference, pp. 139-146.
    doi: 10.1109/VNC.2011.6117135
    Full text is available at: http://epubs.surrey.ac.uk/736923/

    Abstract

    In this paper, we propose a novel position-based routing protocol designed to anticipate the characteristics of an urban VANET environment. The proposed algorithm utilizes the prediction of the node's position and navigation information to improve the efficiency of routing protocol in a vehicular network. In addition, we use the information about link layer quality in terms of SNIR and MAC frame error rate to further improve the efficiency of the proposed routing protocol. This in particular helps to decrease end-to-end delay. Finally, carry-n-forward mechanism is employed as a repair strategy in sparse networks. It is shown that use of this technique increases packet delivery ratio, but increases end-to-end delay as well and is not recommended for QoS constraint services. Our results suggest that compared with GPSR, our proposal demonstrates better performance in the urban environment. © 2011 IEEE.

  • Katsaros K, Kernchen R, Dianati M, Rieck D. (2011) 'Performance study of a Green Light Optimized Speed Advisory (GLOSA) application using an integrated cooperative ITS simulation platform'. IEEE IWCMC 2011 - 7th International Wireless Communications and Mobile Computing Conference, Istanbul, Turkey: 7th International Wireless Communications and Mobile Computing Conference, pp. 918-923.
    doi: 10.1109/IWCMC.2011.5982524
    Full text is available at: http://epubs.surrey.ac.uk/736925/

    Abstract

    This paper proposes a Green Light Optimized Speed Advisory (GLOSA) application implementation in a typical reference area, and presents the results of its performance analysis using an integrated cooperative ITS simulation platform. Our interest was to monitor the impacts of GLOSA on fuel and traffic efficiency by introducing metrics for average fuel consumption and average stop time behind a traffic light, respectively. For gathering the results we implemented a traffic scenario defining a single route through an urban area including two traffic lights. The simulations are varied for different penetration rates of GLOSA-equipped vehicles and traffic density. Our results indicate that GLOSA systems could improve fuel consumption and reduce traffic congestion in junctions. © 2011 IEEE.

  • Jalili B, Dianati M, Evans BG. (2011) 'Distributed collaborative radio resource allocation in the downlink of OFDMA systems'. IEEE IEEE Vehicular Technology Conference, Yokohama: 73rd IEEE Vehicular Technology Conference, pp. 1-5.
    doi: 10.1109/VETECS.2011.5956416
    Full text is available at: http://epubs.surrey.ac.uk/736924/

    Abstract

    This paper investigates collaboration among neighboring Base Stations (BSs) in OFDMA based cellular networks in the absence of a centralized control unit, which is a defining characteristic of 4G wireless networks. We propose a novel scheme for collaboration between the base stations. Monte Carlo simulation based performance analysis demonstrates effectiveness of collaborative resource allocation among adjacent base stations for OFDMA systems, particularly for the users in the cell edges. © 2011 IEEE.

  • Georgoulas S, Ghader M, Moessner K, Dianati M, Tafazolli R. (2011) 'On the applicability of architecture description languages to future internet networking environments'. Warsaw, Poland: Future Network and Mobile summit 2011
  • Haider F, Dianati M, Tafazolli R. (2011) 'A simulation based study of Mobile Femtocell assisted LTE networks'. IWCMC 2011 - 7th International Wireless Communications and Mobile Computing Conference, , pp. 2198-2203.
    doi: 10.1109/IWCMC.2011.5982771
  • Taghipour MM, Han C, Dianati M. (2011) 'Improving reliability of emergency message dissemination in VANETs'. IWCMC 2011 - 7th International Wireless Communications and Mobile Computing Conference, , pp. 1200-1205.
    doi: 10.1109/IWCMC.2011.5982609
  • Han C, Dianati M, Tafazolli R, Kernchen R. (2010) 'Throughput Analysis of the IEEE 802.11p Enhanced Distributed Channel Access Function in Vehicular Environment'. Ottowa, Canada: 72nd IEEE Vehicular Technology Conference, pp. 1-5.
    doi: 10.1109/VETECF.2010.5594411
  • Jalili B, Dianati M. (2010) 'Application of Taboo Search and Genetic Algorithm in planning and optimization of UMTS radio networks'. IWCMC 2010 - Proceedings of the 6th International Wireless Communications and Mobile Computing Conference, Caen, France: 6th International Wireless Communications and Mobile Computing, pp. 143-147.
    doi: 10.1145/1815396.1815430
    Full text is available at: http://epubs.surrey.ac.uk/736921/

    Abstract

    Planning and optimization of 3G networks is more than just frequency allocation and coverage planning, due to the nature of WCDMA coding. It usually involves solution of an NP-Hard problem. In this paper we propose an effective method for optimizing the Common Pilot Channel (CPICH) transmit power, along with maximizing the number of served users and minimizing the number of cell sites and compare use of two meta-heuristic methods: Taboo Search (TS) and Genetic Algorithm (GA) in planning and optimization of UMTS radio networks.

  • Abu Arja HIH, Dianati M. (2010) 'Opportunistic scheduling with reduced feedback'. IEEE Vehicular Technology Conference,
    doi: 10.1109/VETECF.2010.5594588
    Full text is available at: http://epubs.surrey.ac.uk/734375/

    Abstract

    This paper investigates and proposes the techniques that reduce the number of required feedback channels for implementation of opportunistic scheduling. It is shown that by implementing effective schemes we can exploit significant multiuser diversity gain using a modest number of feedback channels. Simulation based performance analysis is given to demonstrate effectiveness of the proposed schemes in terms of high spectrum efficiency and low feedback overhead. ©2010 Crown.

  • Dianati M, Tafazolli R, Moessner K. (2010) 'Enabling Tussle-Agile Inter-networking Architectures by Underlay Virtualisation'. SPRINGER-VERLAG BERLIN FUTURE INTERNET - FIS 2009, Berlin, GERMANY: 2nd Future Internet Symposium (FIS 2009) 6152, pp. 81-95.
  • Mehrjoo M, Awad MK, Dianati M, Shen X. (2009) 'Maintaining utility fairness using weighting factors in wireless networks'. GLOBECOM - IEEE Global Telecommunications Conference,
  • Dianati M, Tafazolli R, Shen X, Naik K. (2009) 'A markov model for per-user service of opportunistic scheduling'. Proceedings of the 2009 ACM International Wireless Communications and Mobile Computing Conference, IWCMC 2009, , pp. 681-686.
  • Psaras I, Dianati M, Tafazolli R. (2009) 'Why rely on blind AIMDs? (work in progress)'. Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 5550 LNCS, pp. 404-415.
    doi: 10.1007/978-3-642-01399-7_32
    Full text is available at: http://epubs.surrey.ac.uk/734366/

    Abstract

    We are motivated by the fact that fixed Increase rates and Decrease ratios for AIMD cannot adjust TCP's performance to the Internet's diverse networking conditions. Indeed, we find that fixed values for the increase/decrease factors of AIMD restrain flexibility, which is a fundamental property of transport protocols in order to guarantee utilization and fairness in Modern and Future internetworks. We propose a new paradigm for hybrid AIMD designs that has the potential to adjust TCP's behavior according to network conditions. The proposed Multi-Rate AIMD (MR-AIMD) increases additively the Additive Increase factor of AIMD in case of positive feedback and decreases multiplicatively (the AI factor) in case of negative feedback and Explicit Congestion Notifications. In other words, MR-AIMD takes into account ECN signals in order to quantify the level of network contention and adjusts its response accordingly. We show that MR-AIMD reduces retransmission effort significantly, when contention is high, becomes aggressive when contention decreases and tolerates against random, transient errors due to fading channels. © IFIP International Federation for Information Processing 2009.

  • Dianati M, Tafazolli R. (2008) 'Opportunistic scheduling over wireless fading channels without explicit feedback'. IEEE 2008 IEEE 67TH VEHICULAR TECHNOLOGY CONFERENCE-SPRING, VOLS 1-7, Marina Bay, SINGAPORE: 67th IEEE Vehicular Technology Conference, pp. 1871-1875.
  • Dianati M, Alléaume R. (2007) 'Transport layer protocols for the Secoqc Quantum Key Distribution (QKD) network'. IEEE Proceedings - Conference on Local Computer Networks, LCN, Dublin: 32nd IEEE Conference on Local Computer Networks (LCN 2007), pp. 1025-1032.
    doi: 10.1109/LCN.2007.161
    Full text is available at: http://epubs.surrey.ac.uk/736927/

    Abstract

    Quantum Key Distribution (QKD) is an alternative key distribution technique that, unlike the classical approaches, can provide unconditionally secure keys for data communications over public communication networks. The European projet Secoqc (Secure Communication based on Quantum Cryptography) aims at developing a global network for unconditionally secure key distribution. This paper specifies the major elements of the transport layer protocols of the Secoqc QKD network. © 2007 IEEE.

  • Dianati M, Shen X, Naik K. (2006) 'Per-user throughput of opportunistic scheduling scheme over broadcast fading channels'. IEEE International Conference on Communications, 11, pp. 5234-5239.
    doi: 10.1109/ICC.2006.255412
    Full text is available at: http://epubs.surrey.ac.uk/734369/

    Abstract

    In this paper, we propose two analytical models for per-user throughput of an opportunistic scheduling scheme over a broadcast fading channel. For the first model, we use a piecewise linear approximation of the achievable transmission rates versus the values of Signal to Noise and Interference Ratio (SINR). We obtain the conditional average transmission rate of a mobile station, given the maximum channel quality of the other competing mobile stations. Using the probability distribution function of the maximum channel quality of the competing mobile stations, we obtain a closed form unconditional average transmission rate, i.e., per-user throughput, of a mobile station. For the second model, we use a similar approach, but with a precise model of the achievable rates. Furthermore, statistically nonidentical channels for different mobile stations are considered. Thus, the second model is more general and provides more accurate solution, but it requires more computations. The proposed models are useful for call admission control as well as performance studies of wireless networks. Simulation results are given to demonstrate the accuracy of the proposed analytical models. © 2006 IEEE.

  • Mehrjoo M, Dianati M, Shen X, Naik K. (2006) 'Opportunistic fair scheduling for the downlink of IEEE 802.16 wireless metropolitan area networks'. ACM International Conference Proceeding Series, 191
    doi: 10.1145/1185373.1185441
    Full text is available at: http://epubs.surrey.ac.uk/734373/

    Abstract

    In this paper, we propose a novel scheduling scheme for the downlink of IEEE 802.16 networks. A scheduler at the Base Station (BS) decides the order of downlink bursts to be transmitted. The decision is made based on the quality of the channel and the history of transmissions of each Subscriber Station (SS). The scheduler takes advantage of temporal channel fluctuations to increase the BS's throughput and maintain fairness by balancing the long term average throughput of SSs. Simulation results are given to demonstrate the performance of the proposed scheduling scheme. © 2006 ACM.

  • Ling X, Dianati M, Mark JW, Shen X. (2006) 'A link performance model for multi-user wireless fading channels'. ACM International Conference Proceeding Series, 191
    doi: 10.1145/1185373.1185398
  • Dianati M, Ling XH, Naik K, Shen XM. (2005) 'Performance analysis of the node cooperative ARQ scheme for wireless ad-hoc networks'. IEEE GLOBECOM '05: IEEE Global Telecommunications Conference, Vols 1-6, St Louis, MO: IEEE Global Telecommunications Conference (GLOBECOM 05), pp. 3063-3067.
    doi: 10.1109/GLOCOM.2005.1578320
    Full text is available at: http://epubs.surrey.ac.uk/734368/

    Abstract

    In wireless channels, the bursty nature of block errors render immediate packet retransmissions at the link level ineffective. Cooperative communication is a promising technique to combat the negative impacts of channel fading by providing diverse channels between peers in wireless ad-hoc networks. In this paper, an analytical model is proposed for the throughput of the node cooperative automatic repeat request scheme for wireless ad-hoc networks. The model is based on a two-state Markov model for block errors in the wireless fading channels. Simulation results are given to demonstrate effectiveness of the analytical model

  • Dianati M, Shen XS, Naik K. (2005) 'Efficient Scheduling for the Downlink of CDMA Cellular Networks using Base Station Selection Diversity'. IEEE 2ND INTERNATIONAL CONFERENCE ON BROADBAND NETWORKS (BROADNETS 2005), Boston, MA: 2nd International Conference on Broadband Networks (BroadNets 05), pp. 406-411.
    doi: 10.1109/ICBN.2005.1589640
  • Dianati M, Ling XH, Naik S, Shen XM. (2005) 'A node cooperative ARQ scheme for wireless ad-hoc networks'. SPRINGER-VERLAG BERLIN NETWORKING 2005: NETWORKING TECHNOLOGIES, SERVICES, AND PROTOCOLS; PERFORMANCE OF COMPUTER AND COMMUNICATION NETWORKS; MOBILE AND WIRELESS COMMUNICATIONS SYSTEMS, Waterloo, CANADA: 4th International IFIP-TC6 Networking Conference 3462, pp. 1418-1421.
  • Dianati M, Shen XM, Naik S. (2005) 'A new fairness index for radio resource allocation in wireless networks'. IEEE 2005 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE, VOLS 1-4, New Orleans, LA: IEEE Wireless Communications and Networking Conference, pp. 712-717.

Book chapters

  • Dianati M, Shen X, Naik K. (2011) 'Cooperation Link Level Retransmission in Wireless Networks'. in Obaidat MS, Misra S (eds.) Cooperative Networking Wiley Article number 10
    doi: 10.1002/9781119973584.ch10

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