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Studentische Arbeiten

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Mobilkommunikation

Thema

Spectrum Sharing Algorithms for D2D Communication in Cellular Networks

Typ:
Diplomarbeit, Hauptseminar, Masterarbeit, Advanced Research Project (MSCSP)
Betreuer:
M. Sc. Abubaker Matovu Waswa
Status:
ausgeschrieben
Beschreibung:
Please see below

Thema

Optimal Frequency Reuse Rules for High Reliability Low Latency Future Cellular Communication

Typ:
Masterarbeit
Betreuer:
M. Sc. Gebrehiwet Gebrekrstos Lema
Status:
ausgeschrieben
Beschreibung:
In recent years, Long Term Evolution (LTE) cellular networks are rapidly growing in 4G cellular systems. LTE has come up with increased user Quality of Service (QoS) and even better QoS is expected in 5G. However, the bandwidth and frequency spectrum to support these services is critically limited. To address this, service providers need new tools to help them efficiently and effectively optimize their networks. Though different techniques have been proposed against this, it is evident that they either increase in system complexity or results in significant degradation of the quality of service [1].
Hence, in the next generation network designs, an optimal frequency reuse rule is needed that not only maximizes the spectral efficiency but also guarantees the High Reliability Low Latency (HRLL) communications. It would thus be worth revisiting more advanced efficient and effective frequency reuse techniques that result in HRLL at minimum possible system cost [2].

Tasks:
1. Literature study on frequency reuse in 4G/5G cellular communications
2. Investigate the impact of frequency reuse in supporting HRLL communications
3. Propose an optimal frequency reuse technique that meets the HRLL requirements
4. Implement and show its novelty with different types of user profiles and/or with different radio conditions

Requirements:
1. The passion of scientific research
2. Knowledge of cellular communication systems
3. Very good programming skills in MATLAB/C#/C++ (any one of them)

References
[1]. Patel, Anand B., Sukant Kumar Chhotaray, and Niteen B. Patel. "Frequency Reuse Schemes for Interference Management in LTE Femtocell Networks: Issues and Approaches." International Conference, ICARET-2013, International Conference on Advanced Research in Engineering and Technology (ICARET). 2013.
[2]. Park, Jihong, et al. "Revisiting Frequency Reuse towards Supporting Ultra-Reliable Ubiquitous-Rate Communication." arXiv preprint arXiv:1703.04838 (2017).

Thema

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

Typ:
Studienarbeit, Bachelorarbeit, Masterarbeit, Advanced Research Project (MSCSP)
Betreuer:
Zubair Shaik
Status:
ausgeschrieben
Beschreibung:
bitte siehe English Beschreibung.

Thema

Radio Resource Allocation Algorithms in Vehicle-to-Vehicle (V2V) Communications for 5G Wireless Networks

Typ:
Masterarbeit, Advanced Research Project (MSCSP)
Betreuer:
M.Sc. Dariush M. Soleymani
Status:
ausgeschrieben
Beschreibung:
Vehicle-to-vehicle (V2V) based on device-to-device (D2D) communications were introduced in Release 12 and Release 13 of 3GPP standard. Generally, the connected vehicles are likely utilized for mission critical applications, which needs extremely high-reliable and low-latency communications. Due to extremely dynamic propagation environment of V2V communications, several challenges have emerged. One of key challenges is efficient usage of radio resources. To this end, two approaches are available, overlay and underlay resource allocation. Our goal is to find robust radio resource allocation algorithms for different V2V communication use cases
Tasks:
• Literature review on radio resource allocation algorithms in V2V communications.
• Study on potential applications used in V2V communications
• Propose a novel algorithm to allocate radio resources in an efficient way
• Preparation of scenarios and models to evaluate the proposed algorithms
Requirements:
• Very Good knowledge of wireless communications, i.e. NR, LTE, D2D and V2V
• Very good knowledge of C++ programing language
• Knowledge of NS3 simulator / MATLAB (OOP)

Thema

Wireless mesh network of mobile eNBs for LTE backhaul communication

Typ:
Studienarbeit, Bachelorarbeit, Masterarbeit, Advanced Research Project (MSCSP)
Betreuer:
Zubair Shaik
Status:
ausgeschrieben
Beschreibung:
bitte siehe English Beschreibung.

Thema

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

Typ:
Masterarbeit
Betreuer:
M.Sc. Mehdi Harounabadi
M. Sc. Alina Rubina
Status:
ausgeschrieben
Beschreibung:
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

Thema

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

Typ:
Masterarbeit
Betreuer:
M. Sc. Alina Rubina
Status:
ausgeschrieben
Beschreibung:
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.

Thema

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

Typ:
Diplomarbeit, Projektseminar, Masterarbeit
Betreuer:
M.Sc. Mehdi Harounabadi
Status:
ausgeschrieben
Beschreibung:
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

Thema

E-Assessment auf Basis interaktiver Simulationswerkzeuge

Typ:
Masterarbeit
Betreuer:
Dr.-Ing. Heinz- Dietrich Wuttke
Christian Saul
Status:
ausgeschrieben
Beschreibung:
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!.

Integrierte HW/SW-Systeme

Thema

Entwicklung einer heuristischen Methode zur Anpassung eines Simulationsmodelles an Ergebnissen von realen Experimente für Kollisionsvermeidung zwischen Koptern.

Typ:
Hauptseminar, Bachelorarbeit, Masterarbeit
Betreuer:
M. Sc. Victor Casas Melo
Status:
ausgeschrieben
Beschreibung:
Simulationsmodelle sind ein Wertvolles Werkzeug um Probleme zu untersuchen und Lösungen zu entwickeln. Je realitätsnaher Simulationsergebnisse sind, desto nützlicher sind die Modelle. Besondern wichtig ist die Realitätsnahe zwischen Simulation und reale Experimente im Bereich Kollisionsvermeidung zwischen Koptern. Wir verfügen über ein Model im Morse Simulator, wo verschiedenen Parametern eingestellt werden können und eine Flöte von realen Koptern. Mache Parametern, wie Gewicht, maximale Geschwindigkeit oder Größe, lassen sich einfach bei den realen Koptern messen. Trotzdem ist die Einstellung von anderen Parametern wie Windwiderstand oder Beschleunigungspotential nicht so einfach. Wenn experimentelle Daten vorhanden sind, ist es möglich verschiede Parametern auszuprobieren, bis das gesamte Simulationsmodell ähnliche Ergebnisse wie die Experimente liefert. Da die manuelle Suche von Parametern viel Zeit benötigen kann, ist die Nutzung von heuristischen Methoden, wie z.B. genetischen Algorithmen, zum Vorteil.

Aufgaben:

Eine heuristische Methode zu entwickeln, zu implementieren und zu testen, die ein vorgegebenes Simulationsmodell an Data aus reale Experimenten anpasst. Dafür muss die heuristische Methode eine Kombination von Parametern finden, mit den das Simulationsmodell sich ähnlich wie die reale Experimenten verhält.

Thema

Untersuchungen zu modernen Testmöglichkeiten auf Basis von BSCAN

Typ:
Bachelorarbeit, Masterarbeit
Betreuer:
Dr.-Ing. Heinz- Dietrich Wuttke
Status:
ausgeschrieben
Beschreibung:
Diese Arbeit wird in Verbindung mit einem Unternehmen aus Jena durchgeführt. Das die genaue Aufgabenstellung kann mit den Betreuern sowie der Firma bei Interesse besprochen werden. Alle Themen sind im Umfeld folgender Stichworte angesiedelt:
- JTAG
- BSCAN
- Strukturelle Tests von PCBs

Voraussetzungen:
- Kenntnisse in VHDL und/oder C/C++ sind wünschenswert

Weitere Details sind mit dem Betreuer zu besprechen.

Mobilkommunikation

Thema

Offline-online decison making for multi-ferry networks

Typ:
Diplomarbeit, Masterarbeit
Betreuer:
M.Sc. Mehdi Harounabadi
Status:
in Bearbeitung
Beschreibung:
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

Thema

Spectrum Sharing Algorithms for D2D Communication in Cellular Networks

Typ:
Studienarbeit, Hauptseminar, Masterarbeit, Advanced Research Project (MSCSP)
Betreuer:
M. Sc. Abubaker Matovu Waswa
Status:
in Bearbeitung
Beschreibung:
Bitte siehe die englische Beschreibung.

Thema

Performance evaluation of different multi-ferry path planning approaches

Typ:
Masterarbeit
Betreuer:
M.Sc. Mehdi Harounabadi
Status:
in Bearbeitung
Beschreibung:
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

Thema

Air-to-ground Propagation Model Parameter Estimation

Typ:
Masterarbeit
Betreuer:
M.Sc. Oleksandr Andryeyev
Status:
abgeschlossen
Abstract:

Thema

Radio Resource Allocation Algorithm for Overlay D2D/V2V Communication

Typ:
Masterarbeit
Betreuer:
M.Sc. Dariush M. Soleymani
Status:
abgeschlossen
Abstract:

Thema

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

Typ:
Masterarbeit
Betreuer:
M.Sc. Oleksandr Andryeyev
Status:
abgeschlossen
Abstract:

Thema

Radio Resource Management for M2M Applications in 5G Networks

Typ:
Studienarbeit, Masterarbeit, Advanced Research Project (MSCSP)
Betreuer:
Dr.-Ing. Andre Puschmann
Status:
abgeschlossen
Abstract:

Thema

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

Typ:
Masterarbeit
Betreuer:
Dr.-Ing. Mohamed Abdrabou Kalil
Dr.-Ing. Andre Puschmann
Status:
abgeschlossen
Abstract:

Thema

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

Typ:
Masterarbeit, Advanced Research Project (MSCSP)
Betreuer:
Dr.-Ing. Andre Puschmann
Status:
abgeschlossen
Abstract:

Thema

Self-Organization in Next Generation Networks

Typ:
Masterarbeit
Betreuer:
Prof. Dr.-Ing. habil. Andreas Mitschele-Thiel
Dr.-Ing. Muhammad Naseer ul Islam
Bearbeiter:
Jill Eischen
Alain Ruppert
Status:
abgeschlossen
Abstract:

Thema

Evaluierung eines hierarchischen Routingsystems im Kontext des Future Internet Ansatzes „Forwarding on Gates“

Typ:
Masterarbeit
Betreuer:
Dr.-Ing. Thomas Volkert
Bearbeiter:
Manuel Osdoba
Status:
abgeschlossen
Abstract:
Diese Arbeit evaluiert ein hierarchisches Routingsystem anhand eines vorliegenden Konzepts. Hierzu wurden Teile daraus implementiert, um jenes anhand verschiedener Szenarien
zu erproben. Die Vorlage wurde um die verteilte Berechnung von Routen und hierarchischen Strukturen erweitert. Hierzu zählt die Wahl von Koordinatoren verschiedener Hierarchieebenen sowie die Wegfi ndung zwischen Clustern. Des Weiteren wurde die in der Vorlage dargestellte Berechnung der Routen so verändert, dass eine ezientere Weiterleitung von Paketen erfolgt. Um dem Problem eines hohen Stretch-Factors beim hierarchischen Routing entgegenzuwirken, wird ab einer festzulegenden Hierarchiestufe
ein Pfadvektorprotokoll eingesetzt, um dessen Vorteile zu nutzen.

Integrierte HW/SW-Systeme

Thema

Analyse und Konzeption von FPGA-basierten Strukturtests für Sensorleiterplatten

Typ:
Masterarbeit
Betreuer:
Dr.-Ing. Heinz- Dietrich Wuttke
Dr.-Ing. Steffen Ostendorff
Bearbeiter:
Stefan Vogel
Status:
abgeschlossen
Abstract:

Thema

Implementierung von Pipelining für den ROBSY Prozessor

Typ:
Bachelorarbeit, Masterarbeit
Betreuer:
Dr.-Ing. Jorge Hernán Meza Escobar
Bearbeiter:
Paul Harig
Status:
abgeschlossen
Abstract:

Thema

FPGA gestützte Boundary Scan Tests von dynamischen Speicherstrukturen

Typ:
Masterarbeit
Betreuer:
Dr.-Ing. Steffen Ostendorff
Dr.-Ing. Jorge Hernán Meza Escobar
Dipl.-Math. Jörg Sachße
Bearbeiter:
Christian Hergenröder
Status:
abgeschlossen
Abstract:
nicht verfügbar