An example of the usage of wireless LAN technologyfor multimedia: see Berlin live!

TKN - Telecommunication Networks Group TU-Berlin
Head of Group: Prof. Adam Wolisz Faculty of Electrical Engineering and Computer Science

Research Areas

  • MPEG-4 and H.263 Video Traces for Network Performance Evaluation
    We provide a publicly available library of frame size traces of long MPEG-4 and H.263 encoded videos. The frame size traces have been generated from several video sequences of typically 60 minutes length each.
  • Handover in All-IP Mobile Networks
    Problem definition: change of the point of attachment to the network,
    Our main issues: multicast-based handover, security issues of handover
    Existing approaches: Mobile IP, extended SIP mobility, Cellular IP, Hawaii, Iceberg, ...
  • MAC Protocols for Wireless LANs
    IEEE 802.11, HIPERLAN, HIPERLAN-II, industrial WLAN, emerging High Speed W-LANS including support for ATM. 
    Joint optimization of MAC and transmission, power saving. 
  • Extending the Coverage from a Single Picocell to a Picocell Cluster
    LAN-based Distribution System, ATM-based , WDM networks based. Combination of multicast and location information 
  • Wireless Access to High Speed Networks
    Wireless access to the internet and ATM; signalling and protocol issues. 
    Dynamic multilevel compromise: bit rate vs. mobility speed 
  • Transport Protocols for Heterogeneous Networks with Wireless Components
    Cooping with extensive errors and interrruptions. 
  • Power Saving in Mobile Networks
    Optimization and harmonization of protocols with respect to energy consumption. 
  • Multimedia Applications 
    Video-, audio and joint working application for mobile and fixed networks 
  • IP over WDM
  • Protocol Engineering
    Methology of network simulation and evaluation of simulation results.
  • Mobivas
    The EU-supported Mobivas Project deals with additional user services for future wireless networks.
    Mobile applications shall be loaded easily into mobile devices (PDA´s). The download of these applications
    will be improved by new protocols and a new platform will enhance the Video/Audio quality
  • Polling MAC Algorithm  for  Wireless PROFIBUS
    Development of different Polling-MAC-Algorithms and some choosen aspects of the MAC- and Linklayer-
    Protocols of the wireless PROFIBUS system under real time conditions.

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