Student Work

Communication networks form the backbone of our digital society and have become a critical infrastructure. However, the operation of networks today is still a manual and error-prone process, which is worrysome.

We have recently started exploring the vision of self-repairing networks and developed a first approach and software which allows for a fast what-if analysis of MPLS networks [1]: our approach relies on a classic result in formal methods and automatically tests whether network configurations are policy compliant (e.g., "can host A reach host B even under up two 2 link failures?").

While our first results are promising and the approach fast in theory, it is still relatively slow in practice. 

Accordingly, in this project, we would like to explore whether machine learning approaches such as Graph Neural Networks (GNNs) could be used to speed up the network verification. If this is the case, interesting opportunities are opened: for example, it may not only be possible to quickly test whether networks are policy-compliant, but even to automatically propose "fixes" in case they are not.

This is a joint work with University of Vienna, Faculty of Computer Science. A short research visit abroad in Austria might be included.

[1]  Jesper Stenbjerg Jensen, Troels Beck Krøgh, Jonas Sand Madsen, Stefan Schmid, Ji?í Srba, and Marc Tom Thorgersen. 2018. P-Rex: fast verification of MPLS networks with multiple link failures. In Proceedings of the 14th International Conference on emerging Networking EXperiments and Technologies (CoNEXT ’18). Association for Computing Machinery, New York, NY, USA, 217–227. DOI:https://doi.org/10.1145/3281411.3281432

Required skills: programming and algorithms; interest in networking and machine learning, interest in formal methods a plus

Remark: The software of P-Rex is available and well-documented and could be used as a blackbox during this thesis.

P4 is a novel language designed for programming packet processors in a high-level language. Currently, it can be used to program different types of networking devices. https://p4.org/

Our goal in this thesis is to investigate the optimal placement of different network functions (or P4 programs) into different P4 devices based on the characteristics of the P4 programs and the P4 devices. 

In this work, the student will formulate the placement problem as an optimization problem and solve it for different objectives and under the relevant constraints.

- Good theoretical background on optimization.

- Background on P4 language is a plus.

The 5G cellular networks are the state-of-the-art cellular networks for the coming 10 years. On the other hand, P4 is a promising language for programming packet processors. It can be used to describe the packet processing pipelines of different devices (FPGAs/ASICs/...).

In this work, we will explore and analyze the potentials of offloading specific 5G Network Functions into P4 programmable devices. The performance gains of this approach will be evaluated.

- Good Critical Thinking

- Basic Programming Skills

- Knowledge about P4 language and 5G is a plus.

The Wireless Sensor Networks lab offers the opportunity to develop software solutions for the wireless sensor networking system, targeting innovative applications. For the next semester, a position is available to assist the participants in learning the programming environment and during the project development phase. The lab is every Tuesday from 15:00 to 18:00.

Solid knowledge in Wireless Communication: PHY, MAC, and network layers. Solid programming skills: C/C++. Linux knowledge. Experience with embedded systems and microcontroller programming knowledge is preferable.

Networked Control Systems, i. e. the interconnection of a control system over a communication network, are a fundamental building block of future industrial automation systems. To study NCS, the NCSbench platform [1,2] was developed allowing performance measurements of a real NCS. The platform is built using Lego, is developed in python, communicates over standard IP network interfaces and is fully open-source.

In order to further develop the platform, a working position is available.

[1] https://github.com/tum-lkn/NCSbench/wiki

[2] S. Zoppi, O. Ayan, F. Molinari; Z. Music, S. Gallenmüller, G. Carle, W. Kellerer, NCSbench: Reproducible Benchmarking Platform for Networked Control Systems. IEEE Consumer Communications & Networking Conference, 2020

This work will consist of a significant amount of programming and also of processing the measurement data.

Requirements:

• Good knowledge of wireless systems and protocols (WLAN, WSN).
• Basic knowledge of LTI control systems.
• Strong C and Python programming skills.
• Experience with Linux systems is recommended.
• Experience with python data processing tools is beneficial.

Networked Control Systems, i. e. the interconnection of a control system over a communication network, are a fundamental building block of future industrial automation systems. To study NCS, the NCSbench platform [1,2] was developed allowing performance measurements of a real NCS. The platform is built using Lego, is developed in python, communicates over standard IP network interfaces and is fully open-source.

The analysis of NCSbench with wireless communication highlighted the problem of packet loss and delays on the NCS. In this project, the novel PRRT transport protocol [3,4] will be deployed on NCSbench to improve the communication performances with wireless communication.

[1] https://github.com/tum-lkn/NCSbench/wiki

[2] S. Zoppi, O. Ayan, F. Molinari; Z. Music, S. Gallenmüller, G. Carle, W. Kellerer, NCSbench: Reproducible Benchmarking Platform for Networked Control Systems. IEEE Consumer Communications & Networking Conference, 2020

[3] https://www.nt.uni-saarland.de/project/latency-and-resilience-aware-networking-larn/

[4] Schmidt, A., Reif, S., Gil Pereira, P., Hönig, T., Herfet, T., & Schröder-Preikschat, W. (2019). Cross-layer pacing for predictably low latency. Proc. 6th Intl. Worksh. on Ultra-Low Latency in Wireless Networks (Infocom ULLWN). IEEE, 184.

This work will consist of a significant amount of programming for embedded devices, and for a large part also of processing the measurement data.

Requirements:

• Strong C and Python programming skills.
• Good knowledge of wireless systems and protocols (WLAN).
• Basic knowledge of LTI control systems.
• Experience with python data processing tools is beneficial.
• Experience with Linux systems is recommended.

Flexibility is an indispensable feature of future communication networks and technologies. Only flexible networks allow to cope with the fast changing demands of future network applications and use cases like 5G/6G. In order to quantify the flexibility of networks, we have recently presented a new flexibility measurement framework. As many problems in network communication are studied on graphs, this thesis should investigate the impact of topologies on network flexibility by applying the concepts as proposed in our framework. In detail, different networking use cases (like network programmability, network failures, and network verification) should be analyzed for a variety of network topologies. As graph measures are one way to characterize network graphs, the thesis should analyze the relation between graph features and network flexibility. It will expected that the studies will be data intensive; hence, the student should bring preliminaries in carrying out automated and data intensive analysis. Finally, this thesis should study the predictability of flexibility given topologies. For this, it should apply supervised machine learning models to answer the question whether we can predict the flexibility of given problems for specific networking problems.

yle="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; color: #212121;">Programming language: Python, C++

yle="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; color: #212121;">Basic understanding of networking concepts: Routing, Facility Placement, etc.

yle="text-align: justify;">Flexible optical networks achieve a significant increase of network capacity by assigning as much spectrum to the demands as needed. With advances in transponders supporting software tunable channel configurations, network planners are able to select the best combination of data rate, modulation format and forward error correction (FEC) for each light-path. However, the impact of failures in these networks is higher due to the closeness between channels as well as the low OSNR margins.

yle="text-align: justify;">Hence, in this thesis we will look into the monitoring capabilities of flexible optical networks provided by existing components as well as extra monitoring equipment. All the gathered monitoring information should be processed by machine learning based classification tools such that fast and efficient failure diagnosis can be achieved.  

Programming skills (Python)

The student will analyze the performance of an existing SDN testbed and, if required, adapt the controller software (OpenDaylight) himself / herself. Furthermore, he/she will setup and extend the testbed with readily-available TSN forwarding devices. Finally, the student will evaluate the suitability of the TSN devices for deployment in a number of pre-selected industrial applications. Subsequently, he/she will take part in formulation and deployment of configurations of the physical hardware (i.e., time schedules, forwarding tables and features such as pre-emption and frame replication).

The position is in industry with Siemens AG. The student will be supervised by an university contact as first supervisor, with industrial contact as second supervisor. Extensions into obligatory (research) internships / thesis are not excluded.

- Linux Networking Knowledge

- Ideally first-hand experiences with SDN as technology or development experience with common SDN platforms

- Some programming experience is required (Java, Python, NETCONF/YANG)

- Proficient English and/or German communication skills

- Ability to work and pursue solutions under limited supervision

- Motivation to work with real hardware deployments

Ermin Sakic - ermin.sakic@tum.de

In this work, we plan to implement several Virtual Network Functions (VNFs) for NAT, Firewall, IDS, etc. on Virtual Machines and Contrainers. We plan to characterize the VNFs in terms of resource usage. Thereafter, we study the reconfigurability and its overhead on the performance of the VNFs. We would like to measure the metrics such as throughput, latency, etc.

programming, linux

amir.varasteh@tum.de

The lecture Broadband Communication Networks (Prof. Wolfgang Kellerer) teaches network-related methods of mobile communication: WIFI, 2G to 5G cellular networks, etc. In order to bridge the gap between the methods and real life, innovative teaching concepts shall be developed in form of short podcasts where the students learn in short episodes about wireless communication and networking in day to day scenarios. In the podcasts the student should also be introduced to short exercises they can perform on their own.

In order to support designing these podcasts Pro. Kellerer is looking for a student experienced in programming and maybe in podcasts to help him.

Very good programming skills; experience with podcasts; experience with app programming (on android/ios)

Access algortihms are a critical part of 5G networks. Currently, algorithm without direct feedback is used as access algorithms and these show unstable behavior. The main access algorithm with feedback, that is "Tree algorithms" are a prominent candidate to support reliable machine type communication in 5G. 

Another hot topic is the multi packet reception with orthogonalization techniques in code, power or frequency that is then decoded with successive interference cancellation techniques. This is simplified as K multipacket reception to investigate the capability for access algorithms.

In this thesis we plan to analytically investigate the behavior tree algorithms with K packet reception. The thesis will require:

• Good stochastic analysis knowledge
• Good coding in any language for simulation purposes
• Good understanding of the wireless communication
• Motivation to investigate mathematical analysis of system models.

The thesis will be co-supervised by Assoc. Prof. Cedomir Stefanovic from Aalborg University.

We offer a working student position to manage the LKN 5G testbed. The student will document and mantain the existing code, and assist in the development of extensions and new features.

The current 5G testbed consists of two next-generation base stations, three mobile equipments, a centralized unit, and a mobile core network. Work is in progress to virtualize and isolate the different software functions, as recommended in 5G and beyond.

The student will have the opportunity to work with a fully-functional 5G mobile network and help in the testing and developing of new features.

C/C++, 4G mobile networks (LTE), version control (Git), virtualization technologies. Optionally: Python.

Alberto Martínez Alba: alberto.martinez-alba@tum.de

Patrick Kalmbach: patrick.kalmbach@tum.de

Optical core networks deploy fixed grid in order to accommodate their demands. The trend is however, migrate towards flexgrid networks able to use as much spectrum as required by the demand allowing a better use of the spectrum. However, the Routing and Wavelength Assignment (RWA) paradigm becomes more complex as it has to find the suitable spectrum of the demand.

This thesis will consider two different alternatives to solve the Routing and Spectrum Assignment (RSA) problem. Given a database providing for each (source, destination) pair a set of (route, modulation format, baud rate, OSNR, ….), choose the best route and spectrum for a set of demands.

The implementation will be done in Java. The first alternative is based on an existing work (JOCN2018 paper of Soumplis et al.) and the second alternative will be proposed during the thesis.

The evaluation aims at comparing both solutions in terms of computation time, network utilization, network balancing, blocking probability, energy, etc. Different scenarios will be studied: i) Static, ii) Dynamic sequential: ordered set of demands with Tstart, iii) Dynamic random: set of random demands with (Tstart, Tend)

Java programming skills

Basic knowledge of flexible optical networks

Goal is to implement a probabilistic graphical model to represent weighted graphs with overlapping communities.

...

Communication networks form the backbone of our digital society and have become a critical infrastructure. However, the operation of networks today is still a manual and error-prone process, which is worrysome.

We have recently started exploring the vision of self-repairing networks and developed a first approach and software which allows for a fast what-if analysis of MPLS networks [1]: our approach relies on a classic result in formal methods and automatically tests whether network configurations are policy compliant (e.g., "can host A reach host B even under up two 2 link failures?").

While our first results are promising and the approach fast in theory, it is still relatively slow in practice. 

This work analysis the runtime of the MPLS network verification tool AalWiNes.

This is a joint work with University of Vienna, Faculty of Computer Science. A short research visit abroad in Austria might be included.

[1]  Jesper Stenbjerg Jensen, Troels Beck Krøgh, Jonas Sand Madsen, Stefan Schmid, Ji?í Srba, and Marc Tom Thorgersen. 2018. P-Rex: fast verification of MPLS networks with multiple link failures. In Proceedings of the 14th International Conference on emerging Networking EXperiments and Technologies (CoNEXT ’18). Association for Computing Machinery, New York, NY, USA, 217–227. DOI:https://doi.org/10.1145/3281411.3281432

Required skills: programming and algorithms; interest in networking and machine learning, interest in formal methods a plus

Remark: The software of P-Rex is available and well-documented and could be used as a blackbox during this thesis.

Software-Defined Networking (SDN) is proposed as at technic to increase the network performance by decoupling the control from the data plane of commodity hardware. Recently, SDN has been proposed as a solution to further improve the Radio Access Network (RAN) side of the network. To this aim the notion of SD-RAN controllers has emerged and there is a vast of ongoing research on the performance, evaluation and use of such entities.

In this thesis, the student will have a hands-on experience with FlexRAN controller which is one of the main state-of-the-art SD-RAN controllers. The goal is to enable control of FlexRAN over multiple cells (i.e., eNB/gNB) and ensure a logical flow among the messages exchanged among them. The final evaluation will require a demonstration of the Proof-of-Concept and a set of measurements regarding the cell and SD-RAN controller performance.

• Programming skills in C/C++ is a must, Python knowledge is a plus.
• Knowlegde about SDN, RAN, network slicing is a plus.

5G Networks are anticipated to support the tremendous growth in the traffic demands and the heterogeneity of future applications. In that regard network slicing paves the way towards programmable and flexible networks. On the other hand, delay critical applications require an additional boost on the performance which solutions like Mobile Edge Computing (MEC) or network caching can provide. 

In this thesis the student shall focus on the algorithmic part of the joint network slicing and edge caching. A solution to efficiently manage the resources in order to provide the required performance is needed. To this aim, learning approaches could potentially be utilized for the resource allocation in order to further improve the performance.

• Good knowledge of simulation environments such as Matlab, Python.
• Good mathematical background. Basic knowledge of network slicing and optimization algorithms is a plus.

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Designing IP-address schemes is a crucial task in networking. Forwarding of data packets is performend based on IP addresses based on lookup tables. However, table space is limited. IP addresses are thus required to efficiently encode node location in the graph to reduce the number of table entries. Recent trends in networking to include machine learning in the match action pipeline of switches further increase the need for predictable addresses.

The goal of this thesis is to investigate whether IP address prefixes can be learned for topologies based on bernoulli embeddings of graph nodes. The performance of the code is evaluated based on classification performance. Further, the student should investigate the required size of codes to enable reliable forwarding.

- Machine Learning

- Python

- Tensoflow

- Networking

In this work, we would like to implement a nested approach to make three decisions in a Space-Air-Ground Integrated Network: 1) Where to place Internet-based services for airplane passengers? 2) How to route the traffic from the plane to the VM? 3) Are VM migrations necessary over time? 

Experience in Python or Java, Mathematical Optimization, Algorithms

amir.varasteh@tum.de

The assignment of airplanes to datacenters while they are flying is necessary to provide Internet-based services to passengers. Also, considering the mobility of the airplanes, these assignemnts might need to be reconfigured in time. In this work, we would like to implement and evaluate a reinforcement learning approach in a Space-Air-Ground Integrated scenario, where we provide QoS-aware Internet-based services to passengers while airplanes are flying.

Experience in Python or Java, ML, Algorithms

amir.varasteh@tum.de

Sensor to Cloud Solution via a Gateway

Das Thema dieser Bachelorthesis ist die Entwicklung, Optimierung und Evaluation des proprietären Brandmeldebussystems LSNi1 der Firma Bosch Sicherheitssysteme GmbH in Grasbrunn.

Brandmeldeanlagen sind ein bestehender notwendiger Teil der Gebaudetechnik und sollen fur neue vernetzte IoT-Dienste verwendet werden. Aufgrund immer höheren Anforderungen dieser Dienste soll die Datenrate uber den Brandmeldebus gesteigert werden. Zur Zeit wird das Bussystem zur verhaltnismäßig datenarmen Alarmabfrage und Antwort der Netzelemente verwendet. Ein wichtiger Punkt ist dabei, die Systemcharakteristika des Brandmeldesystems nicht zu verschlechtern. Solche Netzwerke sind als Sicherheitssysteme deklariert und mussen daher äußerst zuverlässig in Sachen Ausfallsicherheit und Fehlererkennung sein.

Die Aufgabe besteht darin, eine neue Übertragungstechnik mit höherer Datenrate auf der physikalischen Schicht des Busses zu finden und diese mit Hilfe eines Prototypen umzusetzen. Die Optimierung des Prototypen soll durch Berechnung und Experimentieren mit Systemelementen ausgearbeitet werden. Daraufhin werden verschiedene Testaufbauten, im firmeneigenen Labor getestet. Die dabei aufgenommenen Daten werden über ein entwickeltes Matlab-Evaluierungsprogramm ausgewertet, um eindeutige Aussagen über die Funktionalitat des Systems zu geben. Eine besondere Herausforderung bei Systemen dieser Art sind die hohen Kabellängen und die große Anzahl an Systemelementen auf dem Bus. Mit den ausgewerteten Ergebnissen soll überpruft werden, in welchem Umfang die Datenrate auf dem Bus gesteigert werden kann.

Recently, a scalable load balancing algorithm in the dataplane has been proposed that leverages P4 to estimate the utilization in the network and assign flows to the least utilized path. This approach can be interpreted as a form of Graham's List algorithm.

In this thesis, the student is tasked to investigate how a different online scheduling algorithm called IMBAL performs compared to HULA. A prototype of IMBAL should be implemented in NS3. The tasks of this thesis are:

1. Literature research and overview to online scheduling and traffic engineering in data center networks.
2. Design how IMBAL can be implemented in NS3.
3. Implementation of IMBAL in NS3.
4. Evaluation of the implementation in NS3 with production traffic traces and comparison to HULA (a HULA implementation is provided from the chair and its implementation not part of this thesis).

One of the many promises of 5G is that it will enable novel applications for vertical industries like manufacturing and logistics. An overview of the foreseen use cases and corresponding requirements to the communication system can be found in the technical report TR 22.804 by 3GPP. In this context, Germany’s spectrum authority BNetzA is aiming to support the adoption of 5G in vertical industries by making available the frequency band 3.7-3.8 GHz for so-called private 5G networks. In such private networks, landowners (of a factory, harbor, airport, etc.) can either set up and operate their own infrastructure on-premise or outsource these tasks to a third-party, e.g., a mobile network operator.

As communication networks in the industrial domain have stringent Quality-of-Service requirements w.r.t. latency, reliability, etc., the objective of this work is to develop a software and hardware platform for monitoring such parameters in wireless networks, e.g., in order to document the reliable operation and integrity in a private network. Because of the emergence of advanced computing platforms and the widespread availability of data through the Internet, the field of machine learning has received lots of attention from the research community. Particularly, large progress has been made in the field of deep learning, where the approach to solving problems has shifted from creating accurate models to gathering lots of measurements. The aim of this work is also to identify and use machine learning methods where appropriate, in order to solve the above-mentioned task.

The following approach is envisioned:

• Develop a hardware platform for recording wireless signals (e.g., based on off-the-shelf software-defined-radios)
• Collect traces of wireless signals in a private network
• Develop and evaluate a method to construct a radio environment map based on suitable wireless metrics (e.g., signal strength), using modern machine learning approaches where appropriate
• Consider wireless standards agnostic as well as wireless standards specific metrics
• Investigate the use of mobile sensor nodes vs. fixed sensor nodes

Modeling of NetFPGA Programmed with P4

Network slicing is a new emerging technique introduced in 5G to boost network performance and accomodate the new heterogeneous requirements of upcoming applications. To this end this has attracted a lot of attention in the state-of-the-art where there is vast of ongoing research in resource allocation and network efficiency in the RAN domain.

The focus of this thesis will be on implementation of an event based slicing simulator and built-up of a deep reinforcement learning framework that interacts with the schedulers of the event based simulator. The final goal is the ability to predict the scheduler type and adjust the scheduling decisions accordingly to boost the network performace.

Next generation mobile networks are envisioned to cope with heterogeneous applications with diverse requirements. To this end, 5G is paving the way towards more scalable and higher performing deployments. This leads to a revised architecture, where the majority of the functionalities are implemented as network functions, which could be scaled up/down depending on the application requirements. 

3GPP has already released the 5G architecture overview, however there exists no actual open source deployment of RAN functionalities. This will be crucial towards the evaluation of the Core network both in terms of scalability and performance. In this thesis, the student shall understand the 5G standardization, especially the control plane communication between the RAN and 5G Core. Further, an initial RAN function compatible with the 5G standards shall be implemented and evaluation of control plane performance will be carried out. 

• Strong knowledge on programming languages Python, C++ or Java.
• Knowledge about mobile networking is necessary.
• Knowlegde about 4G/5G architecture is a plus.

N.A.

Network slicing is a novel approach used in 5G networks to enable the deployment and coexistence of heterogeneous network with various Quality of Service (QoS) requirements in the same physical infrastructure. In the Radio Access Network (RAN) the network slicing concept is complex is due to the stochastic nature of wireless channels and scarce resources. Vast of ongoing research deal with optimization approaches for RAN slicing, however most of the focus is on the downlink scenario. Nonethess, a joint optimization of downlink and uplink scenarios can render the problem more complex, but on the other hand can procude better results for the overal system behavior.

In this master's thesis the student will focus on a combined downlink/uplink scenario of a cellular system and provide a joint optimization algorithm to enhance the network performance. 

• Basic knowledge of cellular systems 4G/5G.
• Good knowledge of programming languages Python, Matlab.
• Good mathematical background, especially on optimization techniques.
• Knowlegde of tools such as Gurobi is a plus.

Network slicing is a new emerging technique introduced in 5G to boost network performance and accomodate the new heterogeneous requirements of upcoming applications. To this end this has attracted a lot of attention in the state-of-the-art where there is vast of ongoing research in resource allocation and network efficiency in the RAN domain.

The focus of this thesis will be on development and implementation of heuristic approaches for increasing efficiency in resource allocation and network performance. 

• Strong mathematical background.
• Solid programming skills (python, matlab, c++).
• Knowledge of optimization techniques is a plus.

LiFi is becoming an increasingly important technology as the unlicensed ISM band gets overcrowded. LiFi, with its high data rates, emerges as a promising solution to provide connectivity in an aircraft using overhead LED lights thereby reducing the interference with other wireless technologies and reducing the overall aircraft radio emissions. The integration of LiFi into existing communication systems is best envisioned in the form of wireless Heterogeneous Networks or HetNets where the short-range, additional capacity providing LiFi cells complement the broader coverage providing WiFi cells. Any user device in such a HetNet is equipped with multiple wireless interfaces i.e. LiFi and WiFi.

In this work, the student is expected to design and evaluate a reliable wireless access technology selection algorithm that performs load balancing between LiFi and WiFi.

A Service Function Chain (SFC) can be deployed by utilizing Network Function Virtualization (NFV) concept. A challenge during the lifetime of SFCs can over- / underload a Virtual Network Function (VNF). To solve this issue, firsly, the under- / overload bottleneck should be identified. Secondly, an algorithm must be solved to solve the under- / overloaded situation efficiently.

In this work, we plan to design and evaluate an optimized strategy to identify and cope with under / over deployed SFCs. We want focus on a distributed optimization approach, called Alternating Direction Method of Multipliers (ADMM).

Mathematical Optimization, Algorithms, Java / Python

amir.varasteh@tum.de

Introduction to Software Defined Networking (SDN) and Network Virtualization paradigms has brought new challenges to tackle. In this environment, network switches communicate to SDN controllers through a hypervisor. Therefore, considering a network graph, three questions may come up: 1) Where to deploy SDN controllers? 2) Where to deploy SDN hypervirors? 3) How to connect network switches to the respective SDN controllers to meet the traffic dynamicity and QoS requirements?

In this work, we plan to design and evaluate an optimization framework to optimally answer the above questions.

Mathematical Optimization, Algorithms, Java / Python

amir.varasteh@tum.de

Softwarized wireless sensor networks base station to prototype 5G-like ecosystem using cheap sensor to test out most recent radio resource management techniques.  

Current mobile devices support several wireless technologies to communicate with the outer world. To this end, these devices often include multiple LTE, WiFi, or BlueTooth interfaces. In addition, base stations also have several wired or wireless interfaces to communicate with one another or with the core network. This adds a new degree of freedom to the problem of optimally selecting data flows within a mobile network, which is motivated by the ever-changing nature of wireless channels. In this thesis, a flexible mobile network supporting live selection of interfaces will be analyzed. Available algorithms to adaptively select interfaces and reconfigure data flows will be explored. A flexibility framework will be used in order to highlight the importance of request changes and reaction time.

Familiarity with mobile and wireless networks. Experience with MATLAB, Python or other programming languages or simulation environments. 

Testbed with QT GUI and 4 mini USRPs for communication. GNURadio implementation for the SDRs.

Flexibility is an indispensable feature of future communication networks and technologies. Only flexible networks allow to cope with the fast-changing demands of future network applications and use cases like 5G/6G. In order to quantify the flexibility of networks, we have recently presented a new flexibility measurement framework. Many problems in network communication are studied on graphs. This internship centers around a particular use case of Controller Placement Problem and investigate the impact of topologies on flexibility of dynamic control plane by applying the concepts as proposed in our framework. As graph measures are one way to characterize network graphs, the thesis should analyze the relation between graph features and flexibility. It will be expected that the studies will be data intensive; hence, the student should bring preliminaries in carrying out automated and data intensive analysis. Finally, this internship should study the predictability of flexibility given topologies. For this, it should apply supervised machine learning models to answer the question whether we can predict the flexibility of dynamic control plane.

Set up an automated experiment to investigate Lte and WiFi coexstence.

P4 is a novel programming language for programming networking devices (switches and NICs). It allows you to describe how the networking devices will process the packets in a high-level language. This programmability paved the way to many different applications and innovations that were not possible before, which made it a hot research topic nowadays. The objective of this Master Thesis/internship topic is to evaluate the performance of such devices. The main scope of this thesis/ internship work is to measure and model the performance of P4-programmable devices. Note that there are multiple related subtopics, so the required tasks are flexible and will be based on student's interest and skills. The main requirements are being motivated and having basic programming and networking skills. Knowledge about SDN and P4 is a plus. 

Motivation, Basic Programming and Networking skills

P4 is a novel programming language for programming networking devices. It enables the network engineer to describe the behavior in a simple language. Switches via P4 still needs to be communicated with a controller as in any SDN architecture, however, currently available. The latter is the reason for designing a new southbound interface, "P4 Runtime". The objective of this project is to evaluate the performance of the P4Runtime protocol and extend the existing SDN controller's benchmarking tools. A detailed analysis of the results will be performed. The student wants to work on this project in collaboration with Nokia Bell Labs and get a great experience on the trends in networking and SDN. In addition, 

Motivation and good analysis skills, Programming skills: JAVA C ++, SDN and programmable data plan knowledge is a plus

Goal of this internship is the desgin and implementation of a web-based, nteractive data exploration tool. The gool should visualize data obtained from an unsupervised learning scheme. The unsupervised learning scheme detects communities in IP-to-IP communication. The output of the scheme, i.e., communities, nodes that belong to communities, community sizes, etc. should be displayed on the web page. The user can interact with the plots to e.g., hide certain parts of charts or filter information based on selectors.

Must have are a:

- Representaiton of communication graph using a force-directed layout.

- Represenation of communication between groups using a chord diagram.

...

Today, Internet-based services are delivered to on-board passengers on airplanes. Improving the service availablity can be an issue for airline companies and their passengers. 

In this work, we plan to design a reliable approach based on Generalized Assignment Problem, considering the flying airplanes. We want to implement the proposed model and evolve the performance of it in a simulation environment.

Algorithms, Python

amir.varasteh@tum.de

Internetkommunikation offers the opportunity to develop interesting software solutions for technical questions about internet protocols and mechanisms. For the next semester, a position is available to assist the teaching assistants for the tutorials and class project.

• Knowledge in computer networking

• Good programming skills in Python

Network Function Virtualization (NFV) is becoming a promissing technology in modern networks. A challenging problem is determining the placement of Virtual Network Functions (VNFs). In this work, we plan to implement existing algorithms for embedding VNFs chains in NFV-enabled networks. 

Experience in Python or Java, object oriented programming

amir.varasteh@tum.de

The Wireless Sensor Networks lab offers the opportunity to develop software solutions for the wireless sensor networking system, targeting innovative applications. For the next semester, a position is available to assist the participants in learning the programming environment and during the project development phase. The lab is every Tuesday from 15:00 to 18:00.

Solid knowledge in Wireless Communication: PHY, MAC, and network layers. Solid programming skills: C/C++. Linux knowledge. Experience with embedded systems and microcontroller programming knowledge is preferable.

The wireless sensor networks lab offers the opportunity to develop software solutions for wireless sensor networking systems, targeting innovative applications. For the next semester, a position is available to assist the participants in learning the programming environment and during the project development phase. The lab is every Tuesday from 15:00 till 18:00.

The yle="color: #333333; font-family: Arial, sans-serif; font-size: 14px;">Software-Defined Networking (SDN) lab offers the opportunity to work with real hardware on interesting and entertaining projects related to the SDN network paradigm. For the next semester, a position is available to assist the teaching assistants for the lab (definition and preparation of the assignments, preparation of the hardware, etc.).

yle="list-style-type: square; margin-left: 0px; padding-left: 20px; color: #333333; font-family: Arial, sans-serif; font-size: 14px;">
• yle="padding-left: 0.3em;">Solid knowledge in computer networking (TCP/IP, SDN)
• yle="padding-left: 0.3em;">Solid knowledge of networking tools and Linux (iperf, ssh, etc)
• yle="padding-left: 0.3em;">Good programming skills: C/C++, Python

This working student position supports us in conducting measurement and implementing network algorithms and solutions for various use cases.

Machine Learning (ML) and Artificial Intelligence (AI) are also a current hype in networking research. Within, the applications of ML and AI range from data center network optimization to anomaly detection in campus and enterprise networks. As we are currently conducting a lot of research in this area of application of ML/AI, we are always looking for students willing and able to support us. So, if you are interested in ML/AI and its application to networking, please contact us.

We offer you:

• Possibility to extend your skills in ML/AI, programming and networking

• Possibility to become (Co)-author of publications already before graduating

• Access to compute cluster and data center-like networking environments

We need:

• A student with good programming skills in Python and C++

• Basic knowledge in data science

• Basic understanding of networking: TCP/IP, UDP, BGP, RIP, FatTree Topologies, ...

• Basic knowledge in algorithms and optimization: search, sort, mathematical problem formulation, …

• Basic skills in Linux and server administration

Python, C++, Data Science, Basic Networking