Ekram Hossain | University of Manitoba (original) (raw)

Papers by Ekram Hossain

Research paper thumbnail of Joint Rate Control and Resource Allocation in OFDMA Wireless Mesh Networks

2007 IEEE Wireless Communications and Networking Conference, 2007

Abstract The authors develop distributed algorithms for joint end-to-end rate control and resourc... more Abstract The authors develop distributed algorithms for joint end-to-end rate control and resource (eg, subcarrier, power) allocation in orthogonal frequency division multiple access (OFDMA)-based wireless mesh networks. These algorithms allow spatial reuse where the ...

Research paper thumbnail of A Tandem Queue Model for Performance Analysis in Multihop Wireless Networks

2007 IEEE Wireless Communications and Networking Conference, 2007

We present a tandem queueing model for performance analysis and engineering of multihop wireless ... more We present a tandem queueing model for performance analysis and engineering of multihop wireless networks. To solve the queueing model, a direct (or exact) method and a decomposition method are proposed. The proposed decomposition method reduces the computational complexity significantly which requires us to solve L single queues instead of a full tandem system of L queues. The tandem queue model captures a batch arrival process and multi-rate transmission achieved by adaptive modulation and coding. We obtain the queue length distribution and derive all end-to-end performance measures including loss probability, average delay. The proposed decomposition approach is validated and some interesting insights into the system performance and guidelines for system design are highlighted.

Research paper thumbnail of Cognitive spectrum access in device-to-device-enabled cellular networks

IEEE Communications Magazine, 2015

Research paper thumbnail of Location-Aware Cross-Tier Coordinated Multipoint Transmission in Two-Tier Cellular Networks

Multi-tier cellular networks are considered as an effective solution to enhance the coverage and ... more Multi-tier cellular networks are considered as an effective solution to enhance the coverage and data rate offered by cellular systems. In a multi-tier network, high power base stations (BSs) such as macro BSs are overlaid by lower power small cells such as femtocells and/or picocells. However, co-channel deployment of multiple tiers of BSs gives rise to the problem of cross-tier interference that significantly impacts the performance of wireless networks. Multicell cooperation techniques, such as coordinated multipoint (CoMP) transmission, {have} been proposed as a promising solution to mitigate the impact of the cross-tier interference in multi-tier networks. In this paper, we propose a novel scheme for \textbf{L}ocation-\textbf{A}ware \textbf{C}ross-\textbf{T}ier \textbf{C}ooperation (LA-CTC) between BSs in different tiers for downlink CoMP transmission in two-tier cellular networks. On one hand, the proposed scheme only uses CoMP transmission to enhance the performance of the us...

Research paper thumbnail of Call-level and packet-level performance modeling in cellular CDMA networks

GLOBECOM '05. IEEE Global Telecommunications Conference, 2005., 2005

ABSTRACT

Research paper thumbnail of Wireless Control of a Teleoperated Hydraulic Manipulator With Application Towards Live-Line Maintenance

ASME/BATH 2013 Symposium on Fluid Power and Motion Control, 2013

Research paper thumbnail of Wiley Series on Adaptive and Cognitive Dynamic Systems

Motai/Data-Variant Kernel Analysis, 2015

Research paper thumbnail of Cross-Layer Performance in Cellular WCDMA/3G Networks: Modelling and Analysis

Emerging Location Aware Broadband Wireless Ad Hoc Networks, 2005

ABSTRACT

Research paper thumbnail of Queueing analysis and admission control for multi-rate wireless networks with opportunistic scheduling and ARQ-based error control

IEEE International Conference on Communications, 2005. ICC 2005. 2005, 2005

Abstract— We analyze the radio link level queueing performance for a multi-rate wireless network ... more Abstract— We analyze the radio link level queueing performance for a multi-rate wireless network using adaptive modulation and coding (AMC), scheduling, and automatic repeat request (ARQ)-based er-ror control. The analytical framework, which is developed based on a ...

Research paper thumbnail of Sampling rate reduction for 60 GHz UWB communication using compressive sensing

2009 Conference Record of the Forty-Third Asilomar Conference on Signals, Systems and Computers, 2009

Research paper thumbnail of Queueing Analysis of Distributed MAC in Wireless Ad Hoc Networks with Differentiated Services

2006 IEEE International Conference on Communications, 2006

ABSTRACT A queueing analysis of a distributed and energy-aware medium access control (MAC) protoc... more ABSTRACT A queueing analysis of a distributed and energy-aware medium access control (MAC) protocol is presented for wireless ad hoc networks with service differentiation. We consider a battery-powered node in the network with two different types of traffic, and model the node as a MAP/PH/1/K non-preemptive priority queue with multiple vacations to model the sleep and wakeup mechanism of the MAC layer as the server of the queues. Taking into account the non-saturation case for the queueing analysis of the MAC protocol, using phase-type distribution for both the service and the vacation processes, and combining the priority queueing model with the vacation queueing model make the analysis very general and comprehensive.

Research paper thumbnail of End-system architecture for distributed networked multimedia applications: issues, trends and future directions

The emerging broadband computer networks (wired and wireless) are likely to have numerous multime... more The emerging broadband computer networks (wired and wireless) are likely to have numerous multimedia applications, such as videoconferencing, interactive games, and collaborative computing standard features in desktop PCs and portables. In recent years there have been significant developments in the field of multimedia coding algorithms and their VLSI implementations along with the development of high speed networking technology (e.g., ATM, FDDI, fast Ethernet). But the end-system architecture (software and hardware) as a whole is lagging behind these advancements. Optimized hardware and software architectures are needed for end systems that will guarantee predictable performance of real-time multimedia applications according to user provided QoS. In this paper, we identify the major end-system hardware and software requirements for networked multimedia applications. Focusing mainly on hardware and operating system levels, we advocate an integrated end-system architecture rather tha...

Research paper thumbnail of Analysis of K-tier Uplink Cellular Networks with Ambient RF Energy Harvesting

IEEE Journal on Selected Areas in Communications, 2015

Research paper thumbnail of Dynamic rate and power adaptation under multiple SIR constraints in cellular VSF WCDMA networks

IEEE International Conference on Communications, 2003. ICC '03., 2003

ABSTRACT

Research paper thumbnail of Medium access control design for full duplex wireless systems: challenges and approaches

IEEE Communications Magazine, 2015

Research paper thumbnail of Mobility-aware admission control with QoS guarantees in OFDMA femtocell networks

2013 IEEE International Conference on Communications (ICC), 2013

ABSTRACT

Research paper thumbnail of Wireless Mobile Ad Hoc Networks

EURASIP Journal on Wireless Communications and Networking, 2007

... Fary Z. Ghassemlooy, UK Christian Hartmann, Germany Stefan Kaiser, Germany GK Karagiannidis, ... more ... Fary Z. Ghassemlooy, UK Christian Hartmann, Germany Stefan Kaiser, Germany GK Karagiannidis, Greece Hyung-Myung Kim, Korea CC Ko, Singapore Visa Koivunen, Finland Richard Kozick, USA Bhaskar Krishnamachari, USA S. Lambotharan, UK Vincent Lau, Hong Kong ...

Research paper thumbnail of Carrier aggregation/channel bonding in next generation cellular networks: methods and challenges

Research paper thumbnail of Optimization of Periodic Channel Sensing by Secondary Users in a Cognitive Radio Network

2010 IEEE Global Telecommunications Conference GLOBECOM 2010, 2010

ABSTRACT With the employment of cognitive radio technology, dynamic spectrum management has the p... more ABSTRACT With the employment of cognitive radio technology, dynamic spectrum management has the potential to solve the underused spectrum problem. In this paper, we introduce and compare two periodic sensing and transmission schemes for secondary users (SUs) in cognitive radio networks. In an attempt to maximize the exploitation of spectrum opportunities in these two schemes, we analyze three metrics of SUs, namely, channel utility, collision rate and sensing overhead. Optimizations of SU's slot period are analyzed under single-SU single-channel scenario. The proposed schemes are applicable to any i.i.d. ON-OFF channel distribution.

Research paper thumbnail of Markov-based analysis of end-to-end batch transmission in a multi-hop wireless network

IEEE International Conference on Communications, 2005. ICC 2005. 2005, 2005

Research paper thumbnail of Joint Rate Control and Resource Allocation in OFDMA Wireless Mesh Networks

2007 IEEE Wireless Communications and Networking Conference, 2007

Abstract The authors develop distributed algorithms for joint end-to-end rate control and resourc... more Abstract The authors develop distributed algorithms for joint end-to-end rate control and resource (eg, subcarrier, power) allocation in orthogonal frequency division multiple access (OFDMA)-based wireless mesh networks. These algorithms allow spatial reuse where the ...

Research paper thumbnail of A Tandem Queue Model for Performance Analysis in Multihop Wireless Networks

2007 IEEE Wireless Communications and Networking Conference, 2007

We present a tandem queueing model for performance analysis and engineering of multihop wireless ... more We present a tandem queueing model for performance analysis and engineering of multihop wireless networks. To solve the queueing model, a direct (or exact) method and a decomposition method are proposed. The proposed decomposition method reduces the computational complexity significantly which requires us to solve L single queues instead of a full tandem system of L queues. The tandem queue model captures a batch arrival process and multi-rate transmission achieved by adaptive modulation and coding. We obtain the queue length distribution and derive all end-to-end performance measures including loss probability, average delay. The proposed decomposition approach is validated and some interesting insights into the system performance and guidelines for system design are highlighted.

Research paper thumbnail of Cognitive spectrum access in device-to-device-enabled cellular networks

IEEE Communications Magazine, 2015

Research paper thumbnail of Location-Aware Cross-Tier Coordinated Multipoint Transmission in Two-Tier Cellular Networks

Multi-tier cellular networks are considered as an effective solution to enhance the coverage and ... more Multi-tier cellular networks are considered as an effective solution to enhance the coverage and data rate offered by cellular systems. In a multi-tier network, high power base stations (BSs) such as macro BSs are overlaid by lower power small cells such as femtocells and/or picocells. However, co-channel deployment of multiple tiers of BSs gives rise to the problem of cross-tier interference that significantly impacts the performance of wireless networks. Multicell cooperation techniques, such as coordinated multipoint (CoMP) transmission, {have} been proposed as a promising solution to mitigate the impact of the cross-tier interference in multi-tier networks. In this paper, we propose a novel scheme for \textbf{L}ocation-\textbf{A}ware \textbf{C}ross-\textbf{T}ier \textbf{C}ooperation (LA-CTC) between BSs in different tiers for downlink CoMP transmission in two-tier cellular networks. On one hand, the proposed scheme only uses CoMP transmission to enhance the performance of the us...

Research paper thumbnail of Call-level and packet-level performance modeling in cellular CDMA networks

GLOBECOM '05. IEEE Global Telecommunications Conference, 2005., 2005

ABSTRACT

Research paper thumbnail of Wireless Control of a Teleoperated Hydraulic Manipulator With Application Towards Live-Line Maintenance

ASME/BATH 2013 Symposium on Fluid Power and Motion Control, 2013

Research paper thumbnail of Wiley Series on Adaptive and Cognitive Dynamic Systems

Motai/Data-Variant Kernel Analysis, 2015

Research paper thumbnail of Cross-Layer Performance in Cellular WCDMA/3G Networks: Modelling and Analysis

Emerging Location Aware Broadband Wireless Ad Hoc Networks, 2005

ABSTRACT

Research paper thumbnail of Queueing analysis and admission control for multi-rate wireless networks with opportunistic scheduling and ARQ-based error control

IEEE International Conference on Communications, 2005. ICC 2005. 2005, 2005

Abstract— We analyze the radio link level queueing performance for a multi-rate wireless network ... more Abstract— We analyze the radio link level queueing performance for a multi-rate wireless network using adaptive modulation and coding (AMC), scheduling, and automatic repeat request (ARQ)-based er-ror control. The analytical framework, which is developed based on a ...

Research paper thumbnail of Sampling rate reduction for 60 GHz UWB communication using compressive sensing

2009 Conference Record of the Forty-Third Asilomar Conference on Signals, Systems and Computers, 2009

Research paper thumbnail of Queueing Analysis of Distributed MAC in Wireless Ad Hoc Networks with Differentiated Services

2006 IEEE International Conference on Communications, 2006

ABSTRACT A queueing analysis of a distributed and energy-aware medium access control (MAC) protoc... more ABSTRACT A queueing analysis of a distributed and energy-aware medium access control (MAC) protocol is presented for wireless ad hoc networks with service differentiation. We consider a battery-powered node in the network with two different types of traffic, and model the node as a MAP/PH/1/K non-preemptive priority queue with multiple vacations to model the sleep and wakeup mechanism of the MAC layer as the server of the queues. Taking into account the non-saturation case for the queueing analysis of the MAC protocol, using phase-type distribution for both the service and the vacation processes, and combining the priority queueing model with the vacation queueing model make the analysis very general and comprehensive.

Research paper thumbnail of End-system architecture for distributed networked multimedia applications: issues, trends and future directions

The emerging broadband computer networks (wired and wireless) are likely to have numerous multime... more The emerging broadband computer networks (wired and wireless) are likely to have numerous multimedia applications, such as videoconferencing, interactive games, and collaborative computing standard features in desktop PCs and portables. In recent years there have been significant developments in the field of multimedia coding algorithms and their VLSI implementations along with the development of high speed networking technology (e.g., ATM, FDDI, fast Ethernet). But the end-system architecture (software and hardware) as a whole is lagging behind these advancements. Optimized hardware and software architectures are needed for end systems that will guarantee predictable performance of real-time multimedia applications according to user provided QoS. In this paper, we identify the major end-system hardware and software requirements for networked multimedia applications. Focusing mainly on hardware and operating system levels, we advocate an integrated end-system architecture rather tha...

Research paper thumbnail of Analysis of K-tier Uplink Cellular Networks with Ambient RF Energy Harvesting

IEEE Journal on Selected Areas in Communications, 2015

Research paper thumbnail of Dynamic rate and power adaptation under multiple SIR constraints in cellular VSF WCDMA networks

IEEE International Conference on Communications, 2003. ICC '03., 2003

ABSTRACT

Research paper thumbnail of Medium access control design for full duplex wireless systems: challenges and approaches

IEEE Communications Magazine, 2015

Research paper thumbnail of Mobility-aware admission control with QoS guarantees in OFDMA femtocell networks

2013 IEEE International Conference on Communications (ICC), 2013

ABSTRACT

Research paper thumbnail of Wireless Mobile Ad Hoc Networks

EURASIP Journal on Wireless Communications and Networking, 2007

... Fary Z. Ghassemlooy, UK Christian Hartmann, Germany Stefan Kaiser, Germany GK Karagiannidis, ... more ... Fary Z. Ghassemlooy, UK Christian Hartmann, Germany Stefan Kaiser, Germany GK Karagiannidis, Greece Hyung-Myung Kim, Korea CC Ko, Singapore Visa Koivunen, Finland Richard Kozick, USA Bhaskar Krishnamachari, USA S. Lambotharan, UK Vincent Lau, Hong Kong ...

Research paper thumbnail of Carrier aggregation/channel bonding in next generation cellular networks: methods and challenges

Research paper thumbnail of Optimization of Periodic Channel Sensing by Secondary Users in a Cognitive Radio Network

2010 IEEE Global Telecommunications Conference GLOBECOM 2010, 2010

ABSTRACT With the employment of cognitive radio technology, dynamic spectrum management has the p... more ABSTRACT With the employment of cognitive radio technology, dynamic spectrum management has the potential to solve the underused spectrum problem. In this paper, we introduce and compare two periodic sensing and transmission schemes for secondary users (SUs) in cognitive radio networks. In an attempt to maximize the exploitation of spectrum opportunities in these two schemes, we analyze three metrics of SUs, namely, channel utility, collision rate and sensing overhead. Optimizations of SU's slot period are analyzed under single-SU single-channel scenario. The proposed schemes are applicable to any i.i.d. ON-OFF channel distribution.

Research paper thumbnail of Markov-based analysis of end-to-end batch transmission in a multi-hop wireless network

IEEE International Conference on Communications, 2005. ICC 2005. 2005, 2005