OPNET Technologies
7255 Woodmont Avenue
Bethesda, MD 20814
Tel: 240-497-3000
Fax: 240-497-3001
E-mail: mailto:info@opnet.com
Web: http://www.opnet.com/home.html

OPNET is a registered
trademark of OPNET Technologies
© 2004 OPNET Technologies

University: Université de Paris-Est Marne-la-vallée
Professors: Stéphane Lohier

Department: LIGM
PASNet Working group

The Opnet Simulator will help us to test and improve our solutions in the different topics:

- Routing and QoS ;
- Wireless ad hoc networks ;
- Wireless multimedia sensor networks ;
- Cross-layer design for wireless networks ;
- Next generation networks and MIMO.

More specifically, we proposed a new routing protocol (HQAX) [1] based on a cost function in order to improve the throughput and to reduce the delay and packet losses in Wireless Multimedia Sensor Networks [2] (the cross-layer approach is used for the cost function in order to take into account the physical and MAC layers parameters at the routing level). The goals is to implemente and evaluate our proposed routing protocol in comparison with other existing protocols like AODV and OLSR which had been adapted to cope with the features and characteristics of multi-tier WMSNs.
Another work [2] concerns the comparison of the 802.11 MAC layers and the propagation models between in a real testbed and different simulators.
We made also a comparison performance between the 802.15.4 MAC layers impemented in different simulators and a real ZigBee testbeb [3]

[1] S. Lohier, A. Rachedi, Y. Ghamri-Doudane, "A Cost Function for QoS-Aware Routing in Multi-tier Wireless Multimedia Sensor Networks", 12th IFIP/IEEE International Conference on Management of Multimedia and Mobile Networks and Services (MMNS'2009)

[2] A. Rachedi, S. Lohier, S. Cherrier, I. Sahli, "Wireless Network Simulators Relevance Compared to a Real Testbed in Outdoor and Indoor Environments" 6th International Wireless Communications and Mobile Computing Conference (IWCMC'2010), June 28- July 2, 2010. Caen, France

[3] S. Lohier, A. Rachedi, E. Livolant and I. Sahli, "Wireless Sensor Network Simulators Relevance compared to a real IEEE 802.15.4 Testbed" 7th International Wireless Communications and Mobile Computing Conference (IWCMC'11) Istanbul  Turkey 5-8 July  2011. IEEE Digital Library