PhD Researcher
Sreekrishna Pandi is a Ph.D. researcher at the “Deutsche Telekom Chair of Communication Networks” at TU Dresden, working on the Atto 3D project. He has been working with the chair since January 2015.
He received his Bachelor of Engineering degree in the field of electronics and instrumentation engineering from Anna University, India in 2013. Right after graduation, he moved to Dresden, Germany to pursue his masters studies in the field of ‘Nano-electronic systems’. He graduated his masters degree from the Technical University of Dresden in October 2015. During the final year of his masters he developed deep research interests in the field of computer and mobile networks, with an exclusive focus on their network coding context. He also made a publication and wrote his master thesis on the same field.
Phone: +49 351 463-39244 Email: sreekrishna.pandi@tu-dresden.de
SS 18
WS 17/18
SS 17
WS 16/17
SS 16
WS 15/16
Master Thesis
Study Thesis
Hauptseminar/Oberseminar/Actual Topics
Torre, Roberto; Pandi, Sreekrishna; Nguyen, Giang T.; Fitzek, Frank H. P.
Optimization of a Random Linear Network Coding System with Newton Method for Wireless Systems Proceedings Article
In: 2019 IEEE International Conference on Communications (ICC): Communication QoS, Reliability and Modeling Symposium, Shanghai, China, 2019.
Abstract | BibTeX
@inproceedings{Torre19-rlnc-modeling, title = {Optimization of a Random Linear Network Coding System with Newton Method for Wireless Systems}, author = {Roberto {Torre} and Sreekrishna {Pandi} and Giang T. {Nguyen} and Frank H. P. {Fitzek}}, year = {2019}, date = {2019-05-20}, booktitle = {2019 IEEE International Conference on Communications (ICC): Communication QoS, Reliability and Modeling Symposium}, address = {Shanghai, China}, abstract = {Random Linear Network Coding (RLNC) is widely considered a key enabler for 5G networks. It compensates for lost and corrupted packets by sending redundant coding packets. Despite the considerable attention RLNC received from the research community, the impact of the number of redundant coded packets on the network performance is poorly understood. An excessive number of redundancies would pollute the network with useless packets that give no additional information, and an insufficient number of redundancies would not provide enough packet loss resilience. We introduce a novel formal model for predicting the number of losses a system will have when RLNC is applied, by optimizing simulation results with the Newton-Raphson method. The model allows the sender to set the minimum amount of RLNC redundancies needed to keep the packet loss under a certain threshold. We validate our model against simulations by calculating the MSE between simulation results and our model.}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} }
Close
Pandi, Sreekrishna; Gabriel, Frank; Zhdanenko, Oleksandr; Wunderlich, Simon; Fitzek, Frank H. P.
MESHMERIZE: An Interactive Demo of Resilient Mesh Networks in Drones Proceedings Article
In: 2019 16th IEEE Annual Consumer Communications & Networking Conference (CCNC) (CCNC 2019), Las Vegas, USA, 2019.
@inproceedings{Pand1901:MESHMERIZE, title = {MESHMERIZE: An Interactive Demo of Resilient Mesh Networks in Drones}, author = {Sreekrishna {Pandi} and Frank {Gabriel} and Oleksandr {Zhdanenko} and Simon {Wunderlich} and Frank H. P. {Fitzek}}, year = {2019}, date = {2019-01-01}, booktitle = {2019 16th IEEE Annual Consumer Communications \& Networking Conference (CCNC) (CCNC 2019)}, address = {Las Vegas, USA}, abstract = {Meshmerize is an opportunistic multi-path wireless mesh routing protocol designed for dynamic networks. It ensures persistent connectivity to even mobile nodes in the network. Classical mesh routing protocols fail frequently when the nodes are mobile. In this demo, we demonstrate the resilience of Meshmerize and the shortcomings of the classical protocols using an emulated drone network. The audience can pilot a (virtual) drone in a city through a meshed network of base stations and experience the latency and reliability of both protocols first hand.}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} }
Medard, Muriel; Wunderlich, Simon; Pandi, Sreekrishna; Gabriel, Frank; Fouli, Kerim
System and technique for sliding window network coding-based packet generation Patent
WO 2018/183694 Al, 2018.
Abstract | Links | BibTeX
@patent{CRLNC_Patent, title = {System and technique for sliding window network coding-based packet generation}, author = {Muriel {Medard} and Simon {Wunderlich} and Sreekrishna {Pandi} and Frank {Gabriel} and Kerim {Fouli}}, url = {https://patents.google.com/patent/WO2018183694A1}, year = {2018}, date = {2018-10-04}, number = {WO 2018/183694 Al}, location = {World Intellectual Property Organization \textendash International Bureau}, abstract = {A method and apparatus decode packetized data in the presence of packet erasures using a finite sliding window technique. A decoder receives packets containing uncoded and coded symbols. When a packet with a coded symbol is received, the decoder determines whether a packet sequence number is within a sliding window of w consecutive sequence numbers that are no greater than a decoder sequence number, where the number w is fixed prior to encoding. When this is the case, the decoder decodes the coded symbol into one or more of the w input symbols using the coefficient vector. Decoding may use a forward error correcting (FEC) window within the finite sliding window. Decoding also may use a technique of Gaussian elimination to produce a "shifted" row echelon coefficient matrix.}, keywords = {}, pubstate = {published}, tppubtype = {patent} }
Cabrera, Juan A.; Schmoll, Robert-Steve; Nguyen, Giang T.; Pandi, Sreekrishna; Fitzek, Frank H. P.
Softwarization and Network Coding in the Mobile Edge Cloud for the Tactile Internet Journal Article
In: Proceedings of the IEEE, 2018.
@article{cabrerasoftwarization5g, title = {Softwarization and Network Coding in the Mobile Edge Cloud for the Tactile Internet}, author = {Juan A. {Cabrera} and Robert-Steve {Schmoll} and Giang T. {Nguyen} and Sreekrishna {Pandi} and Frank H. P. {Fitzek}}, year = {2018}, date = {2018-09-26}, urldate = {2018-09-26}, booktitle = {IEEE}, journal = {Proceedings of the IEEE}, abstract = {Future communication systems, such as those enabling the tactile internet, will face disruptive changes compared to the state of art systems, which are i.) highly dynamic topology changes, ii.) replacement of the end to end paradigm with real mesh topologies, and iii.) a massive number of devices. To overcome those disruptive changes, future communication systems are substituting specialized hardware with generic hardware boxes and the softwarization paradigm. Furthermore, this approach allows for quick deployment of new services, which was known to cloud service already. In this paper, we will introduce the most prominent candidates for softwarization such as software defined networking (SDN) and network function virtualization (NFV) and explain the importance of those technologies for the upcoming 5G communication system and tactile internet applications realizing novel mobile edge computing, storage, and networking solutions. Specifically, we will discuss use cases of SDN/NFV such as network coding as a service, and ultra-reliable distributed edge caching. Finally, we will describe our holistic testbed at 5G Lab Germany as a fundamental step towards creating an experiment infrastructure that anticipates the 5G communication systems and tactile internet applications.}, keywords = {}, pubstate = {published}, tppubtype = {article} }
Acevedo, Javier; Scheffel, Robert; Wunderlich, Simon; Hasler, Mattis; Pandi, Sreekrishna; Cabrera, Juan A.; Fitzek, Frank H. P.; Fettweis, Gerhard P.; Reisslein, Martin
Hardware Acceleration for RLNC: A Case Study Based on the Xtensa Processor with Tensilica Instruction-set Extension Journal Article
In: MDPI Electronics, 2018, ISSN: 2079-9292.
BibTeX
@article{Acevedo181, title = {Hardware Acceleration for RLNC: A Case Study Based on the Xtensa Processor with Tensilica Instruction-set Extension}, author = {Javier {Acevedo} and Robert {Scheffel} and Simon {Wunderlich} and Mattis {Hasler} and Sreekrishna {Pandi} and Juan A. {Cabrera} and Frank H. P. {Fitzek} and Gerhard P. {Fettweis} and Martin {Reisslein}}, issn = {2079-9292}, year = {2018}, date = {2018-09-06}, urldate = {2018-09-06}, journal = {MDPI Electronics}, keywords = {}, pubstate = {published}, tppubtype = {article} }
Torre, Roberto; Pandi, Sreekrishna; Fitzek, Frank H. P.
Network-Coded Multigeneration Protocols in Heterogeneous Cellular Networks Proceedings Article
In: SpringerLink Digital Library, pp. 10, Technische Universität Dresden Springer, Faro, Portugal, 2018.
@inproceedings{mgproto-nc, title = {Network-Coded Multigeneration Protocols in Heterogeneous Cellular Networks}, author = {Roberto {Torre} and Sreekrishna {Pandi} and Frank H. P. {Fitzek}}, year = {2018}, date = {2018-08-31}, booktitle = {SpringerLink Digital Library}, volume = {1}, number = {1}, pages = {10}, publisher = {Springer}, address = {Faro, Portugal}, organization = {Technische Universit\"{a}t Dresden}, series = {1}, abstract = {In the upcoming era of 5G a huge increase in the number of devices will define a heterogeneous environment with a massive amount of lossy wireless communications. Among all error correction protocols, Random Linear Network Coding is now taking the lead. However, these protocols were firstly designed to provide in-order-delay in D2D communications. The interplay between Network Coding and Mobile Clouds creates a mesh network where nodes may receive information from multiple sources. Nevertheless, Network Coding protocols still have some weaknesses in multipath environments because they can only handle one generation at the same time. In this paper, we propose a method to improve conventional RLNC protocols by making them be able to manage multiple generations simultaneously. We also identify possible trade-offs between conventional RLNC protocols and our new approach. We conclude that multigeneration protocols have better behavior in terms of throughput and resilience, but the average latency per decoded packet is higher.}, keywords = {}, pubstate = {accepted}, tppubtype = {inproceedings} }
Leiva-Mayorga, Israel; Torre, Roberto; Pandi, Sreekrishna; Nguyen, Giang T.; Boscà, Vicent Plà; Martinez-Bauset, Jorge; Fitzek, Frank H. P.
A Network-coded Cooperation Protocol for Efficient Massive Content Distribution Proceedings Article
In: IEEE GLOBECOM 2018 Conference Proceedings, pp. 7, Technische Universität Dresden IEEE, Dubai, United Arab Emirates, 2018.
@inproceedings{nccnet-model, title = {A Network-coded Cooperation Protocol for Efficient Massive Content Distribution}, author = {Israel {Leiva-Mayorga} and Roberto {Torre} and Sreekrishna {Pandi} and Giang T. {Nguyen} and Vicent {Pl\`{a} Bosc\`{a}} and Jorge {Martinez-Bauset} and Frank H. P. {Fitzek}}, year = {2018}, date = {2018-08-15}, booktitle = {IEEE GLOBECOM 2018 Conference Proceedings}, volume = {1}, number = {1}, pages = {7}, publisher = {IEEE}, address = {Dubai, United Arab Emirates}, organization = {Technische Universit\"{a}t Dresden}, series = {1}, abstract = {Massive content delivery in cellular networks is in the spotlight of the research community as data traffic is increasing at an incredibly fast pace. The existing LTE-A implementation for content broadcast presents several issues such as indoor coverage, along with low energy and spectral efficiency. Therefore, novel systems that provide efficient massive content delivery and reduced energy consumption are needed. In this paper we present a massive content distribution protocol that combines the benefits of cooperative mobile clouds (CMCs) with Random Linear Network Coding (RLNC) through multicast WiFi links. Our main goal is to offload data traffic from the LTE-A link and to reduce the energy consumption at the cooperating UEs. We solve the problem of excessive signaling that oftentimes arises in cooperative approaches by eliminating feedback messages within the CMCs. Instead, we provide a simple but accurate analytic model to correctly configure the number of coded transmissions to be performed within the CMCs. Results show that energy savings of more than 37 percent can be achieved with our protocol when compared to direct content download from the cellular base station. Furthermore, bandwidth utilization at the LTE-A link is sharply reduced.}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} }
Gabriel, Frank; Wunderlich, Simon; Pandi, Sreekrishna; Fitzek, Frank H. P.; Reisslein, Martin
Caterpillar RLNC with Feedback (CRLNC-FB): Reducing Delay in Selective Repeat ARQ through Coding Journal Article
In: IEEE Access, 2018.
Links | BibTeX
@article{GabrielCRLNC, title = {Caterpillar RLNC with Feedback (CRLNC-FB): Reducing Delay in Selective Repeat ARQ through Coding}, author = {Frank {Gabriel} and Simon {Wunderlich} and Sreekrishna {Pandi} and Frank H. P. {Fitzek} and Martin {Reisslein}}, doi = {10.1109/ACCESS.2018.2865137}, year = {2018}, date = {2018-08-13}, journal = {IEEE Access}, keywords = {}, pubstate = {published}, tppubtype = {article} }
Tsokalo, Ievgenii A.; Gabriel, Frank; Pandi, Sreekrishna; Fitzek, Frank H. P.; Lehnert, Ralf
Reliable Feedback Mechanisms for Routing Protocols with Network Coding Proceedings Article
In: Proceedings of 2018 IEEE International Symposium on Power Line Communications and its Applications (ISPLC), pp. 7, Technische Universität Dresden IEEE, Manchester, UK, 2018, ISBN: 978-1-5386-1913-1.
@inproceedings{Tsokalo2018, title = {Reliable Feedback Mechanisms for Routing Protocols with Network Coding}, author = {Ievgenii A. {Tsokalo} and Frank {Gabriel} and Sreekrishna {Pandi} and Frank H. P. {Fitzek} and Ralf {Lehnert}}, doi = {10.1109/ISPLC.2018.8360234}, isbn = {978-1-5386-1913-1}, year = {2018}, date = {2018-04-11}, booktitle = {Proceedings of 2018 IEEE International Symposium on Power Line Communications and its Applications (ISPLC)}, volume = {1}, number = {1}, pages = {7}, publisher = {IEEE}, address = {Manchester, UK}, organization = {Technische Universit\"{a}t Dresden}, series = {1}, abstract = {PLC has the broadcast channel that enables overhearing and allows to use cooperative routing strategies. Opportunistic Routing (OpR) is a modern cooperative routing paradigm in broadcast channel networks such as PLC and wireless networks. In combination with Random Linear Network Coding (RLNC), it has been proven to increase the achievable data rate and reliability significantly. The reliability is supported by Automatic Repeat reQuest (ARQ) mechanisms. Traditional ARQs as Stop-And-Wait, Go-Back-N and Selective-Repeat are outperformed by the hybrid ARQs (HARQs). We analyze and compare six HARQs designed especially for protocols with Network Coding (NC). For this purpose, we propose a novel minimalistic evaluation setup. It reveals the disadvantages of each feedback (ARQ) mechanisms allowing an effective and fair comparison. We define performance metrics that indicate the reliability and efficiency and conduct the experiments using different NC parameters and the feedback frequency. We notice that some HARQs allow high reliability (packet loss \< 10 \^{O}\^{e}\AE4 ), while others have just a few percent protocol overhead. For such results, only one feedback per the code block is normally sufficient.}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} }
Schmoll, Robert-Steve; Pandi, Sreekrishna; Braun, Patrik J.; Fitzek, Frank H. P.
Demonstration of VR / AR offloading to Mobile Edge Cloud for low latency 5G gaming application Proceedings Article
In: 2018 15th IEEE Annual Consumer Communications & Networking Conference (CCNC) (CCNC 2018), Las Vegas, USA, 2018.
@inproceedings{Pand1801:Demonstration, title = {Demonstration of VR / AR offloading to Mobile Edge Cloud for low latency 5G gaming application}, author = {Robert-Steve {Schmoll} and Sreekrishna {Pandi} and Patrik J. {Braun} and Frank H. P. {Fitzek}}, year = {2018}, date = {2018-01-01}, booktitle = {2018 15th IEEE Annual Consumer Communications \& Networking Conference (CCNC) (CCNC 2018)}, address = {Las Vegas, USA}, abstract = {Future 5G mobile communication networks aim to provide many more use cases not only for people but also for connecting machines. Some of these applications, like VR/AR and automation, call for low latencies, which cannot be achieved by aggregated data centres. Also, for VR/AR, offloading of computation will be a key element to bring new experiences to mobile devices. In order to fulfil low latency, outsourcing of computation and mobility, the Mobile Edge Cloud (MEC) will play a key role in 5G networking. This demo shows an implementation of a VR game in an MEC with the capability to move game servers across the world without service interruption}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} }