Research Fields


Intelligent Transportation Systems (ITS)
: large-scale deployment of roadside networks (RONETs), architecture and protocols for roadside networks, V2X services and applications, routing and QoS (resource management) in VANETs, etc.
Wireless Multi-hop Networks (MUNETs): capacity distribution management, routing and QoS.
Future Internet: multihoming and mobility, next generation IP „Node-based Internet Protocol (NIP)„, load distribution.
Interplanetary Communication: communication models for H2H interactions, quality of interaction (QoI), etc.



Technical Interests


Wireless Network Technologies


Vehicular Communication Networks (VCNs): V2V, V2R and roadside networks
Wireless Multi-hop Networks (MUNETs): mesh networks, ad-hoc networks and routing protocols
Next Generation Heterogeneous Wireless Networks
Delay Tolerant Networks (DTNs)

Wireless Network Standards


IEEE 802.11 WLANs and related extensions – MAC and physical layer
IEEE 802.11p and 1609 for Vehicular Communication Networks
IEEE 802.15.4 for Sensor networks
IEEE 802.16 WiMAX
IEEE 802.20 for Handoff Mechanisms
3GPP standards for UMTS and LTE
and others

Wireless Networks-related Services and Technologies


Load Distribution: Fairness-oriented load distribution, esp. for wireless network technologies with cellular and mesh nature such as WLAN, WiMAX, UMTS, LTE, etc.
QoS: End-to-end QoS solutions, especially for IP-based wireless networks, mechanisms and protocols for resource reservation and admission control
Handoff mechanisms for seamless mobility
Routing Protocols, especially for VANETs and mesh backbone networks
VoIP: Wireless VoIP, especially VoIP over WLAN, and SIP-based VoIP architectures and systems



R&D Projects


PRONET Project

Planning Platform for Roadside Networks

Based on the results of the OPAL-VCN project.

Goal
Focuses on the Deployment of Roadside Networks and includes
  • Investigating the influencing factors and their effects on the planning process
  • Developing methods for RSUs placement/distribution in various environments
  • Developing Software Platform for supporting the planning of roadside network

Duration
2014 - 2017 (planned)

Keywords
Intelligent Transportation Network (ITS), ITS Deployment, Roadside Networks, Roadside Backhaul/Backbone Networks (RBNs), Roadside Access Networks (RANs), IEEE 802.11p/1609 Wireless Access for Vehicular Environment (WAVE), IEEE 802.11a/g/n WLAN, Network Planning and Design, Software System Design and Implementation, urban roads, rural roads, highways

RSUs Placement
From technical perspective, the placement/distribution of Roadside Units (RSUs) in urban and rural areas as well as on highways depicts one of the main fields in the planning of roadside networks. In this respect, some of the main points to be cleared are, among others:
  1. RSUs distribution form and density in relation with characteristics of roads networks;
  2. RSUs placement/distribution methods to be used under which conditions;
  3. Influencing factors on the RSUs distribution.

Various factors have impact on the RSUs distribution and placement strategies such as:
  • Topological and topographical characteristics of roads networks,
  • Technical characteristics of used technologies,
  • Vehicular traffic characteristics of roads networks.

Different influencing factors lead to different impacts and thus different issues and challenges.

The planning of a large-scale deployment of the roadside networks in sense of RSUs placement/distribution usually follows 3 main phases:

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Software Platform Subsystems
The system of the software platform consists of 5 main subsystems:

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Terminology
Site of Interest (SoI) denotes any point along the road, at which a RSU can be placed.
Roadside Access Unit (RAU) generalizes the concept of access network, where a RAU can be an RSU, Roadside Access Point (RAP), etc.
Roadside Network Station (RNS) indicates the combination of a SoI and the placed RAU.

Relevant Publications
Yasmin Amin and Robil Daher: „RSUs Placement Strategies Using OpenStreetMaps and GoogleMaps – Challenges and Solutions“, IEEE Vehicular Networking Conference (VNC 2014), Paderborn, Germany, 2014 (submitted)

Ahmed Makkawi, Robil Daher and Ramy Rizk: „RSUs Placement Using Cumulative Weight Based Method for Urban and Rural Roads“, IEEE Vehicular Networking Conference (VNC 2014), Paderborn, Germany, 2014 (submitted)

Robil Daher: “Fairness-oriented Resource Distribution in Wireless Multi-hop Networks”, The 3rd International Conference on Connected Vehicles & Expo (ICCVE 2014), Vienna, Austria, Nov. 2014


Ramy Rizk, Robil Daher, and Ahmed Makkawi, “RSUs Placement Using Overlap Based Greedy Method for Urban and Rural Roads”, Nets4Cars-2014-Fall, St. Petersburg, Russia, Oct. 2014



OPAL-VCN Project (closed)

Open-Air Lab for Vehicular Communication Network

Project done by the Research Group Computer Architecture at the University of Rostock (Germany).

Goal
Planning, design, implementation and operation of roadside network infrastructures for ITS test-field

Duration
2010 - 2014 (planned) – stopped in 2012

Keywords
Intelligent Transportation Network (ITS), Roadside Networks, Roadside Backhaul/Backbone Networks (RBNs), Roadside Access Networks (RANs), IEEE 802.11p/1609 Wireless Access for Vehicular Environment (WAVE), IEEE 802.11a/g/n WLAN, Network Planning and Design

Planned Test Track
Track length: ≈30km length on German Autobahn (highways) – A19 & A20 around Rostock city
No. of Sites: 33x sites

Site Components
Communication network components: each site includes 1x RSU, 1x AP (802.11n @ 2.4GHz) and 2 or 3 WiFi links (802.11n @ 5GHz)
Sensors: Weather station, camera
Power supply unit: solar panels and accumulators
Construction: Mast (10m height), shaft (1.5m underground)

OPAL-VCN overview

Reference Site
The reference site represents a prototypical implementation of the planned sites along the highway. The implemented site is mounted on the area of the Faculty of Computer Science and Electrical Engineering at the University of Rostock:
Albert-Einstein-Str. 21
D-18059 Rostock

reference site

Relevant Publications
Alexander Gladisch, Robil Daher, Philipp Lehsten and Djamshid Tavangarian: “Context-Aware Energy Management for Energy-Self-Sufficient Network Nodes in Wireless Mesh Networks”, International Conference on Ultra Modern Telecommunication (ICUMT 2011), Budapest, Hungary, Oct. 2011

Martin Krohn, Robil Daher, and Djamshid Tavangarian: QoS with Mobility-aware Forcasting for Data Flows”, MMBnet 2011 Workshop, Hamburg, Germany, September 2011

Martin Kasparick, Alexander Gladisch, Robil Daher, Martin Krohn and Djamshid Tavangarian: “Evaluation Model for Self-X in Wireless Mesh Networks”, IEEE 73rd Vehicular Technology Conference (VTC2011-Spring), International Workshop on Self-Organizing Networks (IWSON), Budapest, Hungary, May 2011

Robert Meschke, Martin Krohn, Robil Daher, Alexander Gladisch and Djamshid Tavangarian: “Novel Handoff Concepts for Roadside Networks using Mechanisms of IEEE 802.11k & IEEE 802.11v”, International Conference on Ultra Modern Telecommunication (ICUMT 2010), Moscow, Russia, Oct. 2010

Alexander Gladisch, Robil Daher, Martin Krohn and Djamshid Tavangarian: “OPAL-VCN: Open Air Lab for Vehicular Communication Networks”, Vehicular Communications and Networking (VECON 2010), Ontario, Canada, Oct. 2010

Martin Krohn, Robil Daher, Martin Arndt, Alexander Gladisch and Djamshid Tavangarian: “Mobility-Aware Preloading Mechanism for Wireless Mesh Backbone Networks”, International Conference on Ultra Modern Telecommunication (ICUMT 2009), Special Session on Next Generation Wireless Ad-Hoc Networks (NG-WANETs), St. Petersburg, Russia, Oct. 2009



SPINC Project

Simulation Platform for Interplanetary Communication

Started in 2014, based on the results achieved in the CAVLOD project.

Goal
Development of interactions model for the interplanetary communication, especially under considering the human form of communication. This also includes the development of a simulation software platform for investigating challenges, issues and new solutions for interplanetary communication.

Relevant Publications
Mario Donick, Robil Daher, Wiebke Schwelgengräber, Martin Krohn and Djamshid Tavangarian: “Communication Model for Time-delayed CSCW-Applications based on Concept of Quality of Interaction and Most Relevant First Transmission”, MMBnet 2011 Workshop, Hamburg, Germany, September 2011

Robil Daher, Mario Donick, Martin Krohn and Djamshid Tavangarian: “Quality of Interaction as an alternative for Quality of Service in Interplanetary Communications”, 28th AIAA International Communications Satellite Systems Conference (ICSSC-2010), Anaheim, California, USA, Sep. 2010

Robil Daher, Martin Krohn, Mario Donick and Djamshid Tavangarian: “Content Relevance-Oriented Data Transport Framework for Interplanetary Networks”, 28th AIAA International Communications Satellite Systems Conference (ICSSC-2010), Anaheim, California, USA, Sep. 2010



CAVLOD Project (closed)

Communication Anticipation over Long-Range Distances

Project done within the Research Group Computer Architecture at the University of Rostock (Germany) and in cooperation with the Scientific Society for Interplanetary Communication (SSIC e.V.) in Rostock (Germany).

Duration
2009 - 2013

Relevant Publications
Donick, M., Daher, R., Schwelgengräber, W., Krohn, M., & Tavangarian, D. (2012). Messung und Optimierung der Interaktionsgüte (Quality of Interaction) zeitverzögerter CSCW-Anwendungen. PIK - Praxis der Informationsverarbeitung und Kommunikation, vol. 35(2), pp. 107–112, May 2012

Mario Donick, Robil Daher, Wiebke Schwelgengräber, Martin Krohn and Djamshid Tavangarian: “Communication Model for Time-delayed CSCW-Applications based on Concept of Quality of Interaction and Most Relevant First Transmission”, MMBnet 2011 Workshop, Hamburg, Germany, September 2011

Robil Daher, Mario Donick, Martin Krohn and Djamshid Tavangarian: “Quality of Interaction as an alternative for Quality of Service in Interplanetary Communications”, 28th AIAA International Communications Satellite Systems Conference (ICSSC-2010), Anaheim, California, USA, Sep. 2010

Robil Daher, Martin Krohn, Mario Donick and Djamshid Tavangarian: “Content Relevance-Oriented Data Transport Framework for Interplanetary Networks”, 28th AIAA International Communications Satellite Systems Conference (ICSSC-2010), Anaheim, California, USA, Sep. 2010

Mario Donick, Robil Daher, Wiebke Schwelgengräber & Djamshid Tavangarian: “Analysis of Communication Processes under Simulated Time-Delay Conditions of Interplanetary Distances”, 51. Fachausschusssitzung DGLR T5.4 Anthropotechnik, Braunschweig, Germany, Oct. 2009