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Mobile Communications

Topic

Spectrum Sharing Algorithms for D2D Communication in Cellular Networks

Kind of work:
Diploma Thesis, Advanced Seminar, Master thesis, Advanced Research Project (MSCSP)
Supervisor:
M. Sc. Abubaker Matovu Waswa
Status:
available
Description:
Description:
Device-to-device (D2D) communication was introduced in 3GPP standards release 12 allowing user equipment in close proximity to communicate directly with minimal network involvement. D2D presents increased spectral efficiency benefits within existing cellular networks. However, the challenge of intra-cell interference limits the spectrum reuse within a given cell in the network. The focus of this research is to design an algorithm for the selection of appropriate D2D pairs allowed to share spectrum of cellular network while minimizing the intra-cell interference to both the cellular network users and also other D2D users.

Tasks;
1. Research on spectrum sharing algorithms in cellular networks
2. Propose a novel algorithm for spectrum sharing
3. Assess performance in terms of spectral efficiency

Requirements;
1. Knowledge of cellular communication systems
2. Good abstraction and programming skills in MATLAB (OOP)

Topic

Real time scheduling algorithm for 5G cellular communication on software defined radios

Kind of work:
Student research project, Bachelor Thesis, Master thesis, Advanced Research Project (MSCSP)
Supervisor:
Zubair Shaik
Status:
available
Description:
Applications with requirements of high reliability and low latency need to be addressed specifically when compared to the other applications. The focus of this project is to design a scheduling algorithm for future cellular communication that improves the performance of real time applications, with respect to latency and reliability.

Tasks:
1. Research on real time scheduling algorithms for LTE/5G
2. Implementation of the algorithm on open source solutions of Openairinterface5G or srsLTE.
3. To test the validation on real time hardware using SDRs

Requirements:
1. Knowledge of cellular communication systems
2. very good programming skills on C/C++
3. The ability to solve practical issues while working on the hardware setup (USRPs, Linux systems etc.)

Topic

Wireless mesh network of mobile eNBs for LTE backhaul communication

Kind of work:
Student research project, Bachelor Thesis, Master thesis, Advanced Research Project (MSCSP)
Supervisor:
Zubair Shaik
Status:
available
Description:
As the mobile eNBs serve the cellular UEs, the idea is to form a wireless mesh network of the eNBs which are not connected directly to EPC. For the backhaul communication, the mesh network would be formed using an additional interface of LTE on the eNB. The project is to be implemented using Omnet++/NS3 simulator.

Tasks:
– Understanding LTE infrastructure and its radio access protocol
– Design and implementation of resource allocation for the mesh network (Centralized/distributed)
– LTE mesh network formation eventually connecting to EPC for the backhaul communication
– Use of an existing routing protocol in the simulator for the multi-hop communication on the mesh network
– Evaluation of network performance of the cellular and mesh network for VoLTE application

Topic

Novel Dynamic Path Planning Algorithm for localization of wireless nodes in multi-UAV scenario using implicit signaling in DTN

Kind of work:
Master thesis
Supervisor:
M.Sc. Mehdi Harounabadi
M. Sc. Alina Rubina
Status:
available
Description:
In unknown environments, dynamic trajectory planning for a UAV represents an effective solution for localizing wireless nodes. The UAV must localize wireless nodes accurately and efficiently without wasting resources.
However, employing a single UAV for localization in vast areas causes long latency and may not be feasible. To overcome these problems, multiple UAVs can be applied in the network.
In this case, cooperation between UAVs is required to avoid redundant visits of already localized nodes. Also, covering the same area by different UAVs will waste time and time is the most crucial parameter in disaster scenarios.
As UAVs may not be always connected to exchange information about their planned trajectory and localized nodes, one possible solution will be employing a signaling of control information among UAVs.
There are two types of signaling. In the first case an explicit signaling is used, where a UAV exchanges the control information whenever it encounters another UAV. However, in the vast networks this cannot be applicable as UAVs have short communication range.
The other feasible solution is implicit signaling through wireless nodes. This can also be called delay tolerant signaling. To implement this, a list of localized nodes is stored in the network among localized nodes.
Wireless nodes act as relay nodes to exchange signaling information among UAVs (indirect signaling of UAVs).
By indirect signaling of UAVs through nodes, the redundancy in time, covered area and number of localized nodes can be decreased significantly. It can improve the latency of localization and decrease the traveled distance of UAVs.
Tasks of the student:
1- Literature review about existing work in static and dynamic UAV trajectory planning for localization and delay tolerant networks routing
2- Developing a cooperative multi-UAV dynamic trajectory planning approach for localization of wireless nodes employing indirect signaling among UAVs
a. Modeling the problem
b. Proposing a solution for the modeled problem
3-Implementation and evaluation of the proposed algorithm comparing two scenarios: no signaling and indirect signaling

Topic

Implementation and Evaluation of Different Path Planning Algorithms for UAV in Wireless Networks

Kind of work:
Master thesis
Supervisor:
M. Sc. Alina Rubina
Status:
available
Description:
Quite recently, considerable attention has been paid to the problem of anchor placement, i.e. a design of a trajectory for a mobile anchor (UAV in our case). Previous studies on this issue have shown that a well-planned mobile anchor trajectory increases the speed and accuracy of the localization process [1].
In this paper, one very challenging scenario is considered where an unmanned aerial vehicle (UAV) is flying over an urban area, which suffers from a disaster. The purpose of a UAV is to localize ’survived’ devices, enabled with Wi-Fi module. The obtained information will help to accelerate the rescue process of people who are stuck inside a building.
This work will be mainly divided into two parts:
1) Simulation part
Implementation of chosen three trajectories (namely, Sierpiński curve, Lebesgue curve and Peano curve) in Python.
Simulation of those and comparison with the existing trajectories.
Consideration of two scenarios, with and without a building.
Based on the simulation results, choosing one or two for the experimental evaluation.
2) Experimental part
Evaluation of the chosen trajectory in a real-world experiment considering two scenarios.

Topic

Applying the solution of vehicle routing problem for path planning of multiple message ferries

Kind of work:
Diploma Thesis, Project Work, Master thesis
Supervisor:
M.Sc. Mehdi Harounabadi
Status:
available
Description:
Message ferrying is a solution to exchange delay tolerant messages among disconnected wireless nodes that are located out of the transmission range of each other. A ferry node (e.g. UAV), travels among disconnected nodes and deliver their messages. The mobility of a ferry node can be controlled and its travel path can be given in advance. Vehicle routing problem (VRP) is a combinatorial optimization problem which defines set of optimal routes for a fleet of vehicles.
The goal of this project is to model the message ferry path planning problem as VRP and to propose a solution to minimize the message delivery delay in a message ferry network.

E-Learning / Remote Lab

Topic

E-Assessment auf Basis interaktiver Simulationswerkzeuge

Kind of work:
Master thesis
Supervisor:
Dr.-Ing. Heinz- Dietrich Wuttke
Christian Saul
Status:
available
Description:
Existierende E-Assessment-Systeme, sowohl Alleinstehende (z.B. Questionmark Perception, Respondus) als auch in Lernplattformen (z.B. moodle, ILIAS, Backboard) integrierte Werkzeuge setzen nur einfache Fragetypen (z.B. Multiple-Choice) für die Überprüfung des gelernten Wissens ein. Dies ermöglicht meist nur das Abprüfen von Faktenwissen. Eine selbstständige Bearbeitung komplexer Verständnis-, Anwendungs- und Analyseaufgaben kann damit nicht überprüft werden. Bezogen auf die Bloom’sche Taxonomie bedeutet dies, dass die unteren Stufen durch bestehende Assessment-Systeme und -Werkzeuge abgedeckt werden, wohingegen die oberen 3 (Analyse, Synthese, Evaluation), auch als Kompetenzen höherer Ordnung bezeichnet, ein Problem darstellen.

Ziel dieser Arbeit ist die konzeptuelle Integration von interaktiven und simulativen Werkzeugen in die Prozesse eines E-Assessment-Systems und deren prototypische Implementierung am Beispiel des am FG Integrierte Kommunikationssysteme entwickelten Online-Laboratoriums RemoteLab sowie des am Fraunhofer IDMT entwickelten E-Assessment-Systems askme!.

Integrated HW/SW Systems

Topic

Entwicklung einer selbstorganisierten Landungsstrategie für Quadkopternschwärmen

Kind of work:
Advanced Seminar, Bachelor Thesis, Master thesis
Supervisor:
M. Sc. Victor Casas Melo
Status:
available
Description:
Quadkoptern die zusammen fliegen, haben das gleiche Ziel. Die können aber nicht alle auf denselben Punkt landen. Deswegen brauchen die Quadkoptern eine Strategie um kollisionsfrei zu landen, wenn sie am Ziel sind.


Aufgaben:


- Literaturrecherche zum Thema: Landungsstrategien für Quadkoptern


- Entwicklung und Implementierung einer Landungsstrategie für einen Quadkopternschwarm


- Optional: Realer Test der Strategie mit drei Quadkoptern(Wetterabhängig)

Topic

Verbesserung von Simulationsmodellen für Quadkopternschwarm

Kind of work:
Advanced Seminar, Bachelor Thesis, Master thesis
Supervisor:
M. Sc. Victor Casas Melo
Status:
available
Description:
Realitätsnahe Simulationsmodelle sind ein wertvolles Werkzeug um Algorithmen zu entwickeln, die später mit realen Quadkoptern getestet werden. Wir haben einen Simulator, mit dem man einen Quadkopternswarm simulieren kann. Wir verfügen auch über eine Flöte von Quadkoptern, mit der man Schwarmalgorithmen testen kann. Ergebnisse von realen Quadkoptern unterscheiden sich von Simulationsergebnisse. Das liegt an Parametern, die Windwiderstand und PID-Reglern des Koptern beeinflussen. Solche Parametern lassen sich nicht eins zu eins von realen Quadkoptern in den Simulator übertragen.

Ziel der Arbeit ist Werte für die oben genannte Parametern zu finden, mit den der Simulator realitätsnah Ergebnisse liefert. Dafür könnte Mann eine Brute-Force-Methode (erschöpfende Suche) anwenden, indem alle mögliche Kombinationen von Parametern testet, bis die Simulation die Realität ähnelt. Da diese Methode Zeit intensive ist, wird erwünscht, Methoden wie Evolutionäre Algorithmen oder Gradientenverfahren bei der Suche auszuprobieren.


Aufgaben:


- Unserer Kopternsimulator kennenzulernen (Python)


- Realen- und Simulationsergebnisse von einer Schwarstrategie zu vergleichen


- Implementierung eines Suchverfahren, um die Simulatorergebnisse realitätsnäher zu machen

Topic

Research about modern test possibilites on the basis of BSCAN

Kind of work:
Bachelor Thesis, Master thesis
Supervisor:
Dr.-Ing. Heinz- Dietrich Wuttke
Status:
available
Description:
This work is a cooperation between TU Ilmenau and a company in Jena. The exact task assignment will be discussed with the advisors and the company if the student is interested.
All topics will be around the following keywords:
- JTAG
- BSCAN
- structural testing of PCBs

Requirements:
- knowledge of VHDL and/or C/C++ is usefull

Further details can be discussed with the advisor.

Mobile Communications

Topic

Offline-online decison making for multi-ferry networks

Kind of work:
Diploma Thesis, Master thesis
Supervisor:
M.Sc. Mehdi Harounabadi
Status:
in progress
Description:
Message ferry networks are disconnected wireless networks where message ferry nodes are employed to travel among disconnected nodes and deliver their messages. The travel path of ferries can be planned offline or ferries can decide their mobility online (on-the-fly). The goal of this project is to propose a message ferry network with multiple message ferries where the path for some ferries are planned offline and other ferries make decision on-the-fly. Each ferry may visit all nodes or a subset of nodes. The assignment of ferries to nodes and type of decision making for a ferry(offline or online) must be done in such a way which the average delay for message delivery in a network is minimized.
The optimization problem should be solved (approximated applying heuristic methods) and the proposed solution must be compared to the networks with pure offline path planning for ferries and networks with pure on-the-fly decision making.
Requirements:
- Understanding of heuristic methods
- Python

Topic

Spectrum Sharing Algorithms for D2D Communication in Cellular Networks

Kind of work:
Student research project, Advanced Seminar, Master thesis, Advanced Research Project (MSCSP)
Supervisor:
M. Sc. Abubaker Matovu Waswa
Status:
in progress
Description:
Device-to-device (D2D) communication was introduced in 3GPP standards release 12 allowing user equipment in close proximity to communicate directly with minimal network involvement. D2D presents increased spectral efficiency benefits within existing cellular networks. However, the challenge of intra-cell interference limits the spectrum reuse within a given cell in the network. The focus of this research is to design an algorithm for the selection of appropriate D2D pairs allowed to share spectrum of cellular network while minimizing the intra-cell interference to both the cellular network users and also other D2D users.

Tasks;
1. Research on spectrum sharing algorithms in cellular networks
2. Propose a novel algorithm for spectrum sharing
3. Assess performance in terms of spectral efficiency

Requirements;
1. Knowledge of cellular communication systems
2. Good abstraction and programming skills in MATLAB (OOP)

Topic

Performance evaluation of different multi-ferry path planning approaches

Kind of work:
Master thesis
Supervisor:
M.Sc. Mehdi Harounabadi
Status:
in progress
Description:
Message ferrying is a solution to exchange delay tolerant messages among distant wireless nodes that are located out of the transmission range of each other. The ferry node (UAV), flies to visit ground nodes and in each contact exchange information with them. Ferry is a wireless node with controllable mobility. It picks up messages from a ground node, flies to the destination and offloads messages. Decision about which ground node to visit (ferry path planning) impacts the performance of message forwarding in network. Having a single ferry in networks that has been established in large areas cannot support communication needs of different traffic types in the network. Multi-ferry approach employs several ferries in the network to meet the performance requirements of the network. Several approaches has been proposed in literature for multi ferry path planning. The objective of this project is:
1. Literature study on existing multi ferry path planning approaches
2. Implementation of some of the selected multi ferry approaches on the existing simulator (python based simulator)
3. Investigation on results to make conclusion

Topic

Air-to-ground Propagation Model Parameter Estimation

Kind of work:
Master thesis
Supervisor:
M.Sc. Oleksandr Andryeyev
Status:
finished
Abstract:

Topic

Radio Resource Allocation Algorithm for Overlay D2D/V2V Communication

Kind of work:
Master thesis
Supervisor:
M.Sc. Dariush M. Soleymani
Status:
finished
Abstract:

Topic

3D Location- and Interference- Aware Mobile Base Station Placement

Kind of work:
Master thesis
Supervisor:
M.Sc. Oleksandr Andryeyev
Status:
finished
Abstract:

Topic

Radio Resource Management for M2M Applications in 5G Networks

Kind of work:
Student research project, Master thesis, Advanced Research Project (MSCSP)
Supervisor:
Dr.-Ing. Andre Puschmann
Status:
finished
Abstract:

Topic

Evaluating the CSMA-based MAC Protocol using a Software Defined Radio Test-bed

Kind of work:
Master thesis
Supervisor:
Dr.-Ing. Mohamed Abdrabou Kalil
Dr.-Ing. Andre Puschmann
Status:
finished
Abstract:

Topic

Comparison of Real-Time Capable MAC Protocols using OMNet++

Kind of work:
Master thesis, Advanced Research Project (MSCSP)
Supervisor:
Dr.-Ing. Andre Puschmann
Status:
finished
Abstract:

Topic

Self-Organization in Next Generation Networks

Kind of work:
Master thesis
Supervisor:
Prof. Dr.-Ing. habil. Andreas Mitschele-Thiel
Dr.-Ing. Muhammad Naseer ul Islam
Students:
Jill Eischen
Alain Ruppert
Status:
finished
Abstract:

Topic

Evaluation of a hierarchical routing system in context of the Future Internet approach

Kind of work:
Master thesis
Supervisor:
Dr.-Ing. Thomas Volkert
Students:
Manuel Osdoba
Status:
finished
Abstract:
This thesis presents the evaluation of a hierarchical routing system on the basis of an existing concept. In order to test several scenarios, parts of the concept were implemented. The pre-work was enhanced by distributed computation of routes and hierarchical structures. Associated to that is the election of coordinators as well as the path finding between clusters. In relation to the pre-work, the computation of routes was advanced. This results in a more efficient way to compute routes for packets. Because hierarchical routing can cause high stretch factors, from a defined hierarchical level, a path vector protocol is used instead.

Integrated HW/SW Systems

Topic

Analysis and conceptual design of FPGA-based structural tests of sensor circuit boards

Kind of work:
Master thesis
Supervisor:
Dr.-Ing. Heinz- Dietrich Wuttke
Dr.-Ing. Steffen Ostendorff
Students:
Stefan Vogel
Status:
finished
Abstract:

Topic

Implementation of pipelining for the ROBSY processor

Kind of work:
Bachelor Thesis, Master thesis
Supervisor:
Dr.-Ing. Jorge Hernán Meza Escobar
Students:
Paul Harig
Status:
finished
Abstract:

Topic

FPGA based boundary scan testing for dynamic memory structures

Kind of work:
Master thesis
Supervisor:
Dr.-Ing. Steffen Ostendorff
Dr.-Ing. Jorge Hernán Meza Escobar
Dipl.-Math. Jörg Sachße
Students:
Christian Hergenröder
Status:
finished
Abstract:
not available