Development and evaluation of a dynamic channel-model and Multiple-Access-Control-Protocols for LiFi communication in OMNeT++

• Typ der Arbeit: Masterarbeit
• Status der Arbeit: laufend
• Projekte: SatelLight
• Betreuer: Marek Jahnke

The communication of LiFi-Transceivers is dependent on the distance and the angle of the transceivers. But what needs also to be considered is for example, that if one light is on, the other lights won't be detected anymore; so the transceivers disrupt themself. Also, in the case of Non-Line-of-Sight (NLOS) communication, the channel is influenced by multipath, e.g. via reflection through walls.

The goal of this thesis is to add to Omnet++ some LiFi-transceiver-modules and obstacles, that can be arranged in a 2D world and then simulate the resulting communication for a specific positioning setup of multiple transceivers.

Then, further implementation and evaluation of some MAC-protocols, error correcting codes or calculation of the power/energy-consumption based on measurements of real devices can be done.

Tasks

• Introduction, motivation, ...
• Related work
• Implementation of some (abstract) LiFi-Transceiver Modules in the omnet++ framework, which can be positioned on the graphical canvas.
• Channel Model: Transmission rate, noise, errors depending on the distance, angle and other properties of the transceivers (e.g. signal strength)
• Based on that, adding some MAC-Protocols, error correction coding and/or energy calculations...
• Evaluation, comparisons (What does work good / not so good; what protocols work better etc...)
• Documentation

Further Reading

• Visible Light Communication, Networking, and Sensing: A Survey, Potential and Challenges

  Parth H. Pathak, Xiaotao Feng, Pengfei Hu, Prasant MohapatraIEEE Communications Surveys &$\mathsemicolon$ Tutorials17.4Institute of Electrical and Electronics Engineers (IEEE)2015.
  10.1109/comst.2015.2476474 [BibTex]

  🗙

  BibTex Entry

  @article{Pathak2015,
  author = {Parth H. Pathak and Xiaotao Feng and Pengfei Hu and Prasant Mohapatra},
  doi = {10.1109/comst.2015.2476474},
  journaltitle = {{IEEE} Communications Surveys {\&}amp$\\mathsemicolon$ Tutorials},
  number = {4},
  pages = {2047–2077},
  priority = {prio2},
  publisher = {Institute of Electrical and Electronics Engineers ({IEEE})},
  ranking = {rank5},
  title = {Visible Light Communication, Networking, and Sensing: A Survey, Potential and Challenges},
  volume = {17},
  year = {2015},
  }

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• A Comprehensive Open-Source Simulation Framework for LiFi Communication

  Shakir Ullah, Saeed Ur Rehman, Peter Han Joo ChongSensors21.72021.
  10.3390/s21072485 [BibTex]

  🗙

  BibTex Entry

  @article{s21072485,
  abstract = {Light Fidelity (LiFi) is a new candidate for wireless networking that utilizes the visible light spectrum and exploits the existing lighting infrastructure in the form of light-emitting diodes (LEDs). It provides point-to-point and point-to-multipoint communication on a bidirectional channel at very high data rates. However, the LiFi has small coverage, and its optical gain is closely related to the receiver’s directionality vis-à-vis the transmitter, therefore it can experience frequent service outages. To provide reliable coverage, the LiFi is integrated with other networking technologies such as wireless fidelity (WiFi) thus forming a hybrid system. The hybrid LiFi/WiFi system faces many challenges including but not limited to seamless integration with the WiFi, support for mobility, handover management, resource sharing, and load balancing. The existing literature has addressed one or the other aspect of the issues facing LiFi systems. There are limited free source tools available to holistically address these challenges in a scalable manner. To this end, we have developed an open-source simulation framework based on the network simulator 3 (ns-3), which realizes critical aspects of the LiFi wireless network. Our developed ns-3 LiFi framework provides a fully functional AP equipped with the physical layer and medium access control (MAC), a mobility model for the user device, and integration between LiFi and WiFi with a handover facility. Simulation results are produced to demonstrate the mobility and handover capabilities, and the performance gains from the LiFi-WiFi hybrid system in terms of packet delay, throughput, packet drop ratio (PDR), and fairness between users. The source code of the framework is made available for the use of the research community.},
  article-number = {2485},
  author = {Ullah, Shakir and Rehman, Saeed Ur and Chong, Peter Han Joo},
  doi = {10.3390/s21072485},
  issn = {1424-8220},
  journaltitle = {Sensors},
  number = {7},
  pubmedid = {33918501},
  title = {A Comprehensive Open-Source Simulation Framework for LiFi Communication},
  url = {https://www.mdpi.com/1424-8220/21/7/2485},
  volume = {21},
  year = {2021},
  }

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