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Esa Olavi Hyytiä - Professor

Esa Olavi Hyytiä

–

School of Engineering and Natural Sciences

Esa Olavi Hyytiä

Professor

Location
Gróska / Gr-308
Phone
525-4603
Email
esa [at] hi.is

Unit
Faculty of Industrial Engineering, Mechanical Engineering and Computer Science
Website
http://hi.is/~esa

ORCID site
https://orcid.org/0000-0001-8453-6926
Research portal – Esa Olavi Hyytiä
Under construction throughout the autumn semester 2023

Published works

2020

Performance Degradation in Parallel-Server Systems with Shared ResourcesACM International Conference Proceeding Series
On value functions for FCFS queues with batch arrivals and general cost structuresPerformance Evaluation
Toward designing cost-optimal policies to utilize IaaS clouds with online learningIEEE Transactions on Parallel and Distributed Systems

2019

A little redundancy goes a long way: Convexity in redundancy systemsPerformance Evaluation
Controlling Queues with Constant Interarrival TimesProceedings of the 31st International Teletraffic Congress, ITC 2019
Last in lineOperations Research Letters
Simulation and performance evaluation of mission critical dispatching systemsPerformance Evaluation

2018

Dispatching discrete-size jobs with multiple deadlines to parallel heterogeneous serversSystems Modeling: Methodologies and Tools
Applying reinforcement learning to basic routing problemLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Evaluating rare events in mission critical dispatching systemsProceedings of the 30th International Teletraffic Congress, ITC 2018
Practical opportunistic content dissemination performance in dense network segmentsComputer Communications
Dynamic Control of Running ServersLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)

2017

Towards Designing Cost-Optimal Policies to Utilize IaaS Clouds with Online LearningProceedings - 2017 IEEE International Conference on Cloud and Autonomic Computing, ICCAC 2017
Value (Generating) Functions for the M^X/G/1 QueueProceedings of the 29th International Teletraffic Congress, ITC 2017
Beyond shortest queue routing with heterogeneous servers and general cost functionsACM International Conference Proceeding Series
Dispatching fixed-sized jobs with multiple deadlines to parallel heterogeneous serversValueTools 2016 - 10th EAI International Conference on Performance Evaluation Methodologies and Tools
Dispatching fixed-sized jobs with multiple deadlines to parallel heterogeneous serversPerformance Evaluation
Meeting soft deadlines in single- and multi-server systemsProceedings of the 28th International Teletraffic Congress, ITC 2016
Scheduling for efficiency and fairness in systems with redundancyPerformance Evaluation
On the sensitivity of geo-based content sharing to location errors2017 13th Annual Conference on Wireless On-Demand Network Systems and Services, WONS 2017 - Proceedings

2016

On Round-Robin routing with FCFS and LCFS schedulingPerformance Evaluation
On search and content availability in opportunistic networksComputer Communications
Routing jobs with deadlines to heterogeneous parallel serversOperations Research Letters
Analysis of the indexing gain when searching in spontaneous wireless networks2016 12th Annual Conference on Wireless On-Demand Network Systems and Services, WONS 2016 - Conference Proceedings
Queueing with redundant requests: exact analysisQueueing Systems
Opportunistic content dissemination performance in dense network segmentsProceedings of the Annual International Conference on Mobile Computing and Networking, MOBICOM
Search in digital pockets: Retrieving remote content in mobile opportunistic networksIEEE Wireless Communications

2015

Reducing latency via redundant requests: Exact analysisPerformance Evaluation Review
Offload (only) the right jobs: Robust offloading using the Markov decision processesProceedings of the WoWMoM 2015: A World of Wireless Mobile and Multimedia Networks
Fairness through Linearly Increasing Holding Costs in Systems of Parallel Servers with Setup DelaysProceedings - 2015 27th International Teletraffic Congress, ITC 2015
Analysis of hop limit in opportunistic networks by static and time-aggregated graphsIEEE International Conference on Communications
Two hops or more: On hop-limited search in opportunistic networksMSWiM 2015 - Proceedings of the 18th ACM International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems

2014

Searching a needle in (linear) opportunistic networksMSWiM 2014 - Proceedings of the 17th ACM International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems
Task assignment in a heterogeneous server farm with switching delays and general energy-aware cost structurePerformance Evaluation
Value driven load balancingPerformance Evaluation
Efficient neighbor discovery in mobile opportunistic networking using mobility awareness2014 6th International Conference on Communication Systems and Networks, COMSNETS 2014
Energy-aware job assignment in server farms with setup delays under LCFS and PS2014 26th International Teletraffic Congress, ITC 2014

2013

Characterizing content sharing properties for mobile users in open city squares2013 10th Annual Conference on Wireless On-Demand Network Systems and Services, WONS 2013
Lookahead actions in dispatching to parallel queuesPerformance Evaluation
Criticality condition for information floating with random walk of nodesPerformance Evaluation
To split or not to split: Selecting the right server with batch arrivalsOperations Research Letters
Seeker-assisted information search in mobile cloudsMCC 2013 - Proceedings of the 2nd, 2013 ACM SIGCOMM Workshop on Mobile Cloud Computing
Evaluating (Geo) content sharing with the ONE simulatorMobiWac 2013 - Proceedings of the 11th ACM International Symposium on Mobility Management and Wireless Access, Co-located with ACM MSWiM 2013
Criticality of large delay tolerant networks via directed continuum percolation in space-timeProceedings - IEEE INFOCOM
Round-Robin routing policy: Value functions and mean performance with job -and server-specific costsVALUETOOLS 2013 - 7th International Conference on Performance Evaluation Methodologies and Tools

2012

Size- and state-aware dispatching problem with queue-specific job sizesEuropean Journal of Operational Research
Non-myopic vehicle and route selection in dynamic DARP with travel time and workload objectivesComputers and Operations Research
Floating information with stationary nodes2012 10th International Symposium on Modeling and Optimization in Mobile, Ad Hoc and Wireless Networks, WiOpt 2012
On the value function of the M/G/1 FCFS and LCFS queuesJournal of Applied Probability
Minimizing slowdown in heterogeneous size-aware dispatching systemsPerformance Evaluation Review
Continuum percolation threshold for permeable aligned cylinders and opportunistic networkingIEEE Communications Letters
Continuum Percolation Threshold for Permeable Aligned Cylinders and Opportunistic NetworkingIeee Communications Letters

2011

Floating content for probabilistic information sharingPervasive and Mobile Computing
When does content float? Characterizing availability of anchored information in opportunistic content sharingProceedings - IEEE INFOCOM
BeachNet: Propagation-based information sharing in mostly static networksACM International Conference Proceeding Series
Why urban mass demand responsive transport?2011 IEEE Forum on Integrated and Sustainable Transportation Systems, FISTS 2011
Energy-aware dispatching in parallel queues with on-off energy consumptionConference Proceedings of the IEEE International Performance, Computing, and Communications Conference
Dispatching problem with fixed size jobs and processor sharing disciplineProceedings of the 2011 23rd International Teletraffic Congress, ITC 2011
Floating content: Information sharing in urban areas2011 IEEE International Conference on Pervasive Computing and Communications, PerCom 2011
M/M/1-PS queue and size-aware task assignmentPerformance Evaluation

2010

Key escrow schemes with sliding window for privacy-aware anomaly detection systemACM International Conference Proceeding Series
Hybrid secret key escrow mechanisms as counters2009 Proceedings of the 1st International Workshop on Security and Communication Networks, IWSCN 2009
Simulation of a large scale dynamic pickup and delivery problemSIMUTools 2010 - 3rd International ICST Conference on Simulation Tools and Techniques
Congestive collapse and its avoidance in a dynamic dial-a-ride system with time windowsLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
A stochastic model for a vehicle in a dial-a-ride systemOperations Research Letters

2009

On the optimality of field-line routing in massively dense wireless multi-hop networksPerformance Evaluation
Detection and tracking of skype by exploiting cross layer information in a live 3G networkLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)

2008

Near-optimal load balancing in dense wireless multi-hop networks4th EURO-NGI Conference on Next Generation Internet Networks - Proceedings

2007

Random waypoint mobility model in cellular networksWireless Networks
On optimality of single-path routes in massively dense wireless multi-hop networksMSWiM'07: Proceedings of the Tenth ACM Symposium on Modeling, Analysis, and Simulation of Wireless and Mobile Systems
On traffic load distribution and load balancing in dense wireless multihop networksEurasip Journal on Wireless Communications and Networking
Optimal degree distribution for LT codes with small message lengthProceedings - IEEE INFOCOM

2006

Connectivity properties of random waypoint mobility model for ad hoc networksIFIP International Federation for Information Processing
Spatial node distribution of the random waypoint mobility model with applicationsIEEE Transactions on Mobile Computing
Traffic matrix estimation in a dense multihop wireless networkProceedings of ISCN'06: 7th International Symosium on Computer Networks
A model for TCP congestion control capturing the correlations in times between the congestion events2006 2nd Conference on Next Generation Internet Design and Engineering, NGI 2006
A Markovian waypoint mobility model with application to hotspot modelingIEEE International Conference on Communications
On load balancing in a dense wireless multihop network2006 2nd Conference on Next Generation Internet Design and Engineering, NGI 2006

2005

Random waypoint model in n-dimensional spaceOperations Research Letters
Traffic load in a wireless multihop networkPE-WASUN'05 - Proceedings of the Second ACM International Workshop on Performance Evaluation of Wireless Ad Hoc, Sensor, and Ubiquitous Networks

2004

Linear program formulation for routing problem in OBS networksProceedings - International Symposium on Computers and Communications

2003

Maximization of Single Hop traffic with Greedy HeuristicsProceedings of the IASTED International Conference on Wireless and Optical Communications

2002

Adaptive importance sampling in routing and wavelength assignment problemEuropean Transactions on Telecommunications

2001

Dynamic routing and wavelength assignment using first policy iteration, inhomogeneous traffic casePerformance and Qos of Next Generation Networking

2000

Dynamic routing and wavelength assignment using first policy iterationIEEE Symposium on Computers and Communications - Proceedings

Keywords for Specialisation:

Performance analysis

Queueing theory

Probability theory