Studienarbeit

Wintersemester 02/03

Performance Evaluation of a Powerline/IEEE 802.11 Multihop Ad Hoc Network

Wireless networks can be separated into infrastructure-based and self-organising networks (also called ad hoc networks). In the former case the traffic over the air interface is organised by base stations that serve at the same time as access points to a fixed core network (typically Ethernet). The latter type of network consists of a group of wireless mobile hosts that can dynamically establish connections and routing mechanisms among themselves to form a "network on-the-fly".

So far, wireless networks have mostly been infrastructure-based. However, interest in ad hoc networks has recently grown due to the possible ad hoc deployment and installation of various systems (notebooks, PDAs). Recent communication standards with ad hoc capability include Bluetooth for Personal Area Networks (PAN), IEEE 802.11 and Hiperlan/2 for Wireless Area Networks (WLAN).

The goal of this project is to determine the communication performance of a multihop ad hoc network, where the access points are connected with each other via wireless and/or powerline links.

The project is divided into three main tasks:

  1. Study of the PHY and MAC layer specifications of the IEEE 802.11 standard as well as the multihop and ad hoc capability of this standard.
  2. Study of communication channels (PLC, 802.11, MIMO channels).
  3. Investigation of the communication performance of a mixed (wireless/PLC) multihop ad hoc network by experiment or computer simulations.

REFERENCES:

Xu, S.; Saadawi, T.: Does the IEEE 802.11 MAP protocol work well in multihop wireless ad hoc networks. IEEE Communications Magazine, Juni 2001.

Johnson, D. B.: Routing in ad hoc networks of mobile hosts. Proceedings of the IEEE Workshop on Mobile Computing Systems and Applications, Dezember 1994.

Perkins, C.: Ad Hoc Networking. Addison-Wesley, Dezember 2000.

Subject area Wireless communications, PLC, Ad hoc networking
Type of work 50% Theory, 30% Measurement, 20% Simulations
Student Benjamin Amsler, Marco Diefenbacher
Supervisor Dr. Marc Kuhn, Dr. Boris Rankov
Professor Prof. Dr. Armin Wittneben