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| | ComNets Research ProfileThe general scope of the department is performance analysis of communication systems by modeling, mathematical analysis and/or stochastic simulation.
Projects usually relate to cutting-edge designs of future mobile and wireless communication systems.
Typically this means either the advancement of existing systems with new or extended characteristics, or the design and the evaluation and the standardization of follow-up generations of existing systems.
Results and Achievements
The following results have been gained so far: - Layer-2-Relay Enhanced Cells have been invented in the year 2000 by ComNets to increase the capacity, extend the range extension and produce higher spectrum efficiency of cellular broadband radio systems. Relay Enhanced Cells are expected to be the key element of future real broadband radio systems.
- The adaptive protocol stack to alternating or in parallel support a variety of different air-interfaces is a ComNets invention.
- The algorithms contained in the spectrum estimation methodology applied by ITU-R WP8F and WRC'07 to estimate the spectrum amount required for Beyond 3G systems have been developed by ComNets.
- Game theory has been introduced to research radio systems co-existence by ComNets.
- ComNets has developed and published a Mesh protocol suitable for IEEE 802 systems.
- Protocol refinements to IEEE 802.11e and 802.11s Medium Access Control (MAC) have been contributed.
- IEEE 802.15.3 Personal Area Network (WiMedia version): MAC protocol design originates from ComNets.
- The packet data service GPRS of the GSM mobile radio system introduced in Spring 2001 is based on published ComNets ideas of 1990. The ETSI standardization in is based on performance analysis contributions by ComNets to the respective group.
- ETSI standard HiperLAN/2 (that never became a product) is based on substantial input by ComNets. IEEE 802.16 (WiMax) and ETSI HiperMAN are standards for wireless systems that closely follow HiperLAN/2. It can be stated that all of these standards to a substantial extend are based on ComNets concepts and ideas.
- The CEN standard TC278 DSRC for Microwave based Electronic Fee Collection System MAC has been designed under the chairmanship of ComNets.
- The ComNets proprietary tools for system level simulation spans digital mobile and wireless system standards like 3GPP R.7, GSM/GPRS/EDGE, CDMA2000, IEEE 802.16e (WiMax), IEEE 802.11x, 3GPP-LTE, 4G and others. It supports large number of active terminals, multi-cellular deployment, precise radio propagation modelling and interference calculation, very realistic traffic load generators and sophisticated stochastic experiments evaluation methods. The tool set is currently being prepared for release under the brand OpenWNS (Wireless Network Simulator) following GNU licence.
- The LRE algorithm for the determination of error masses for correlated statistical result values of stochastic simulation studies is a module used by many universities.
- Prof. B. Walke is the first author of the books:
| (1) | Mobile Radio Networks – Networking, Protocols and Traffic Performance, 2nd Ed. 2002, J. Wiley, 892 pages; | | (2) | UMTS - A Comprehensive Introduction, 2002, J. Wiley, 350 pages; | | (3) | IEEE 802 Wireless Systems: Protocols, Multi-hop Mesh/Relaying, Performance and Spectrum Coexistence 2007, J. Wiley, 382 pages; | | A book on the ITU-R Spectrum Estimation Methodology (together with Hideaki Takagi) is under preparation to appear end 2007 at J. Wiley |
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| | Last Update: 10.09.2008 13.09 | |
