Monday 25 August 2014

Free IEEE 802.11 WLAN Simulator -Pamvotis

A nice simulator to test 802.1e parameters and

Pamvotis is a Wireless LAN Simulator for all the current physical layer extentions of the IEEE 802.11 (IEEE 802.11 a/b/g) standard and for the IEEE 802.11e Draft for Quality of Service in WLANs.

We can get below statistics from this tool:

  • Throughput (bits/sec): The number of bits that a node successfully transmitted in a specific time interval.
  • Throughput (packets/sec): The number of packets that a node successfully transmitted in a specific time interval.
  • Utilization: The percentage of the channel capacity the node occupied. The utilization is the node's throughput in bits per second divided by the node's data rate.
  • Retransmission Attempts: The mean number of retransmission attempts (collisions) until the packet is successfully transmitted.
  • Media access delay: The delay of a packet from the time it is picked up from the transmitter until it is successfully received from the receiver. This statistic contains the delay due to retransmission attempts and the transmission delay. Note: The statistic is relative to the packet length. Moreover, it does not depend on the node's packet generation rate, but only on the network load.
  • Queuing delay: The delay from the birth of a packet until the transmitter picks it up for transmission. It only contains the time a packet waits in the packet queue. It is relative to the packet generation rate and to the media access delay.
  • Total packet delay: The sum of the media access delay and the queuing delay. It is the total delay from the birth of a packet until its reception from the receiver.
  • Delay Jitter: The total delay jitter of each node. The delay jitter is the standard deviation of the total packet delay of each node.
  • Packet Queue Length: The mean number of packets that wait to be transmitted in the packet queue