MobiSteer: Using Steerable Beam Directional Antenna for Vehicular Network Access Export

@inproceedings{navda:mobisteer, abstract = {In this work, we investigate the use of directional antennas and beam steering techniques to improve performance of 802.11 links in the context of communication between a moving vehicle and roadside APs. To this end, we develop a framework called MobiSteer that provides practical approaches to perform beam steering. MobiSteer can operate in two modes - cached mode - where it uses prior radio survey data collected during \\\\\\\\\\\\\\\\idle" drives, and online mode, where it uses probing. The goal is to select the best AP and beam combination at each point along the drive given the available information, so that the throughput can be maximized. For the cached mode, an optimal algorithm for AP and beam selection is developed that factors in all overheads. We provide extensive experimental results using a commercially available eight element phased-array antenna. In the experiments, we use controlled scenarios with our own APs, in two di erent multipath environments, as well as in situ scenarios, where we use APs already deployed in an urban region -- to demonstrate the performance advantage of using MobiSteer over using an equivalent omni-directional antenna. We show that MobiSteer improves the connectivity duration as well as PHY-layer data rate due to better SNR provisioning. In particular, MobiSteer improves the throughput in the controlled experiments by a factor of 2 - 4. In in situ experiments, it improves the connectivity duration by more than a factor of 2 and average SNR by about 15 dB.}, address = {San Juan, Puerto Rico}, author = {Navda, Vishnu and Subramanian, Anand P. and Dhanasekaran, Kannan and Giel, Andreas T. and Das, Samir R.}, booktitle = {Proceedings of the Fifth International Conference on Mobile Systems, Applications, and Services (MobiSys)}, citeulike-article-id = {2820702}, citeulike-linkout-0 = {http://www.wings.cs.sunysb.edu/pubs/mobisteer.pdf}, keywords = {crawdad, measurement, sunysb\_mobisteer, wireless}, month = {June}, posted-at = {2008-05-21 17:27:06}, priority = {2}, publisher = {USENIX Association}, title = {{MobiSteer: Using Steerable Beam Directional Antenna for Vehicular Network Access}}, url = {http://www.wings.cs.sunysb.edu/pubs/mobisteer.pdf}, year = {2007} }

TY - CONF ID - navda:mobisteer L3 - citeulike-article-id:2820702 N2 - In this work, we investigate the use of directional antennas and beam steering techniques to improve performance of 802.11 links in the context of communication between a moving vehicle and roadside APs. To this end, we develop a framework called MobiSteer that provides practical approaches to perform beam steering. MobiSteer can operate in two modes - cached mode - where it uses prior radio survey data collected during \\\\\\\\\\\\\\\\idle" drives, and online mode, where it uses probing. The goal is to select the best AP and beam combination at each point along the drive given the available information, so that the throughput can be maximized. For the cached mode, an optimal algorithm for AP and beam selection is developed that factors in all overheads. We provide extensive experimental results using a commercially available eight element phased-array antenna. In the experiments, we use controlled scenarios with our own APs, in two di erent multipath environments, as well as in situ scenarios, where we use APs already deployed in an urban region -- to demonstrate the performance advantage of using MobiSteer over using an equivalent omni-directional antenna. We show that MobiSteer improves the connectivity duration as well as PHY-layer data rate due to better SNR provisioning. In particular, MobiSteer improves the throughput in the controlled experiments by a factor of 2 - 4. In in situ experiments, it improves the connectivity duration by more than a factor of 2 and average SNR by about 15 dB. AD - San Juan, Puerto Rico TI - {MobiSteer: Using Steerable Beam Directional Antenna for Vehicular Network Access} PB - USENIX Association T2 - Proceedings of the Fifth International Conference on Mobile Systems, Applications, and Services (MobiSys) KW - crawdad KW - measurement KW - sunysb_mobisteer KW - wireless AU - Navda, Vishnu AU - Subramanian, Anand AU - Dhanasekaran, Kannan AU - Giel, Andreas AU - Das, Samir PY - 2007/June// UR - http://www.wings.cs.sunysb.edu/pubs/mobisteer.pdf ER -