last modified

2007-05-29

reason for most recent change

the initial version

release date

2007-04-20

date/time of measurement start

2005-10-15

date/time of measurement end

2005-10-15

website

www.orbit-lab.org/

network type

802.11 ad-hoc

collection environment

To evaluate routing protocols on a controlled indoor wireless testbed, the radio range must be compressed so that larger multi-hop topologies can be mapped into a laboratory size area. We propose noise injection as a more flexible option than hardware attenuation and consider methods for mapping real world wireless network topologies onto the testbed.

We performed experiments for a free space propagation environment. By selecting node positions through an automated procedure, we were able to create a 5-node/4-hop string topology and a random partially connected 6-node topology in a 8m by 8m area with off-the-shelf IEEE 802.11 hardware.

network configuration

One example of a controlled indoor testbed is provided by the Open Access Research Testbed for Next-Generation Wireless Networks (ORBIT). ORBIT's prototype indoor testbed comprises 128 IEEE 802.11a/b/g radio interfaces attached to 64 static nodes arranged on an 8 by 8 grid.

The antennas are mounted on the sides of crates, at 45 and 225 degree positions when looking at the topside of a node and are connected through shielded cables to the Atheros-based wireless cards. Every node is a small form factor PC with 1GHz Via C3 CPU, 512 MB RAM, 20 GB hard disk and three ethernet ports, one of which is used for node configuration and control.

The ORBIT grid used is a 8 by 8 square grid consisting of 64 radio nodes, 32 of them fitted with two Atheros 5212-based IEEE 802.11a/b/g cards each. The remaining are Intel cards. We use Atheros cards for all our experiments as we found the drivers more open and malleable than others.

data collection methodology

Each node runs a Debian Linux distribution with 2.4.26 kernel and uses the madwifi stripped driver.2 This allows generation and processing of raw IEEE802.11 encapsulated frames from the Click Modular Router. One node is configured in Master mode to transmit 802.11 beacon packets, while all other nodes act as receivers. Thus packet error due to collisions is not a possibility. The receivers' driver provides all received MAC frames encapsulated with a so-called Prism header that contains bitrate, received signal strength indicator (RSSI), and other physical layer information. A Click script on the receiver extracts and logs the sequence number and RSSI for each correctly received frame.

• Sanjit Krishnan Kaul
  sanjit@winlab.rutgers.edu
  Rutgers, The State University of New Jersey
  WINLAB, Department of ECE
  Graduate Assistant
  WINLAB, Rutgers, The State University of New Jersey, Technology Centre of New Jersey, 671 Route 1 South, North Brunswick, NJ 08902-3390
  www.winlab.rutgers.edu/~sanjit
  
• Ivan Seskar
  seskar@winlab.rutgers.edu
  
• Marco Gruteser
  gruteser@winlab.rutgers.edu
  

When writing a paper that uses CRAWDAD datasets, we would appreciate it if you could cite both the authors of the dataset and CRAWDAD itself, and identify the exact dataset using the appropriate version number. For this dataset, this citation would look like:

Sanjit Krishnan Kaul, Ivan Seskar, Marco Gruteser, CRAWDAD dataset rutgers/noise (v. 2007‑04‑20), downloaded from https://crawdad.org/rutgers/noise/20070420, https://doi.org/10.15783/C7B59W, Apr 2007.

• Cite using BibTeX
• Cite using RIS

@misc{rutgers-noise-20070420,
    author = {Sanjit Krishnan Kaul and Ivan Seskar and Marco Gruteser},
    title = {{CRAWDAD} dataset rutgers/noise (v. 2007-04-20)},
    howpublished = {Downloaded from \url{https://crawdad.org/rutgers/noise/20070420}},
    doi = {10.15783/C7B59W},
    month = apr,
    year = 2007
}

TY  - DATA
TI  - CRAWDAD dataset rutgers/noise (v. 2007-04-20)
UR  - https://crawdad.org/rutgers/noise/20070420
PY  - 2007/04/20/
AU  - Sanjit Krishnan Kaul
AU  - Ivan Seskar
AU  - Marco Gruteser
DO  - 10.15783/C7B59W
ER  -

If you do not use the provided citation formats, please include a reference with the same information, as described in the CRAWDAD FAQ.