ABSTRACT
This paper presents the design and implementation of Wi-Fi Goes to Town, the first Wi-Fi based roadside hotspot network designed to operate at vehicular speeds with meter-sized picocells. Wi-Fi Goes to Town APs make delivery decisions to the vehicular clients they serve at millisecond-level granularities, exploiting path diversity in roadside networks. In order to accomplish this, we introduce new buffer management algorithms that allow participating APs to manage each others' queues, rapidly quenching each others' transmissions and flushing each others' queues. We furthermore integrate our fine-grained AP selection and queue management into 802.11's frame aggregation and block acknowledgement functions, making the system effective at modern 802.11 bit rates that need frame aggregation to maintain high spectral efficiency. We have implemented our system in an eight-AP network alongside a nearby road, and evaluate its performance with mobile clients moving at up to 35 mph. Depending on the clients' speed, Wi-Fi Goes to Town achieves a 2.4-4.7x TCP throughput improvement over a baseline fast handover protocol that captures the state of the art in Wi-Fi roaming, including the recent IEEE 802.11k and 802.11r standards.
Supplemental Material
- 802.11r, 802.11k, and 802.11w Deployment Guide, Cisco IOS-XE Release 3.3. Website.Google Scholar
- A. Balasubramanian, R. Mahajan, A. Venkataramani, B. N. Levine, J. Zahorjan. Interactive Wi-Fi connectivity for moving vehicles. SIGCOMM, 2008.Google Scholar
- V. Brik, A. Mishra, S. Banerjee. Eliminating handoff latencies in 802.11 WLANs using multiple radios: Applications, experience, and evaluation. IMC, 2005.Google ScholarDigital Library
- V. Bychkovsky, B. Hull, A. Miu, H. Balakrishnan, S. Madden. A measurement study of vehicular internet access using in situ wireless networks. MobiCom, 2006.Google Scholar
- Building a Can antenna. Website.Google Scholar
- R. Chandra, P. Bahl, P. Bahl. MultiNet: Connecting to multiple IEEE 802.11 networks using a single wireless card. Infocom, 2004.Google ScholarCross Ref
- Y.-S. Chen, M.-C. Chuang, C.-K. Chen. DeuceScan: Deuce-based fast handoff scheme in IEEE 802.11 wireless networks. IEEE Transactions on Vehicular Technology, 2008.Google Scholar
- Y.-C. Cheng, Y. Chawathe, A. LaMarca, J. Krumm. Accuracy characterization for metropolitan-scale Wi-Fi localization. MobiSys, 2005. Google ScholarDigital Library
- The Click modular router project. Website.Google Scholar
- Cooper's Law. Website.Google Scholar
- A. Croitoru, D. Niculescu, C. Raiciu. Towards Wi-Fi mobility without fast handover. NSDI, 2015.Google Scholar
- Linksys EA7500 MAX-STREAM AC1900 Wi-Fi router. Website.Google Scholar
- J. Eriksson, H. Balakrishnan, S. Madden. Cabernet: Vehicular content delivery using WiFi. MobiCom, 2008. Google ScholarDigital Library
- Extrecom multiSeries 1000 wireless LAN switch. Website.Google Scholar
- A. Ford, C. Raiciu, M. Handley, O. Bonaventure. TCP extensions for multipath operation with multiple addresses. Tech. rep., RFC-6824, 2013.Google Scholar
- R. Gass, J. Scott, C. Diot. Measurements of in-motion 802.11 networking. WMCSA, 2005.Google Scholar
- D. Halperin, W. Hu, A. Sheth, D. Wetherall. Predictable 802.11 packet delivery from wireless channel measurements. SIGCOMM, 2010.Google Scholar
- D. Halperin, W. Hu, A. Sheth, D. Wetherall. Tool release: Gathering 802.11n traces with channel state information. ACM SIGCOMM CCR, 2011.Google Scholar
- Google Hangouts. Website.Google Scholar
- B. Hull, V. Bychkovsky, Y. Zhang, K. Chen, M. Goraczko, A. Miu, E. Shih, H. Balakrishnan, S. Madden. CarTel: A distributed mobile sensor computing system. SenSys, 2006. Google ScholarDigital Library
- IEEE 802.11k-2008---Amendment 1: Radio Resource Measurement of Wireless LANs, 2008.Google Scholar
- IEEE 802.11r-2008---Amendment 2: Fast Basic Service Set (BSS) Transition, 2008.Google Scholar
- Iperf3. Website.Google Scholar
- S. Kandula, K. Lin, T. Badirkhanli, D. Katabi. FatVAP: Aggregating AP backhaul capacity to maximize throughput. NSDI, 2008.Google Scholar
- E. Kohler, R. Morris, B. Chen, J. Jannotti, M. F. Kaashoek. The Click modular router. ACM Transactions on Computer Systems, 2000. Google ScholarDigital Library
- Laird GD24BP 2.4G directional antenna. Website.Google Scholar
- P. Lv, X. Wang, X. Xue, M. Xu. SWIMMING: Seamless and efficient WiFi-based internet access from moving vehicles. IEEE Transactions on Mobile Computing, 2015. Google ScholarCross Ref
- A. Miu, H. Balakrishnan, C. E. Koksal. Improving loss resilience with multi-radio diversity in wireless networks. MobiCom, 2005. Google ScholarDigital Library
- A. Miu, G. Tan, H. Balakrishnan, J. Apostolopoulos. Divert: Fine-grained path selection for wireless LANs. MobiSys, 2004. Google ScholarDigital Library
- R. Murty, J. Padhye, R. Chandra, A. Wolman, B. Zill. Designing high performance enterprise Wi-Fi networks. NSDI, 2008.Google ScholarDigital Library
- V. Navda, A. Subramanian, K. Dhanasekaran, A. Timm-Giel, S. Das. MobiSteer: Using steerable beam directional antenna for vehicular network access. MobiSys, 2007. Google ScholarDigital Library
- A. Nicholson, Y. Chawathe, M. Chen, B. Noble, D. Wetherall. Improved access point selection. MobiSys, 2006. Google ScholarDigital Library
- A. Nicholson, B. Noble. BreadCrumbs: Forecasting mobile connectivity. MobiCom, 2008. Google ScholarDigital Library
- A. Nicholson, S. Wolchok, B. Noble. Juggler: Virtual networks for fun and profit. IEEE Transactions on Mobile Computing, 2010. Google ScholarDigital Library
- Openwrt Chaos Calmer v15.05.1. Website.Google Scholar
- J. Ott, D. Kutscher. Drive-thru internet: Ieee 802.11 b for" automobile" users. INFOCOM, 2004.Google Scholar
- S. Pack, J. Choi, T. Kwon, Y. Choi. Fast handoff support in IEEE 802.11 wireless networks. IEEE Communication Surveys and Tutorials, 2007.Google ScholarDigital Library
- C. Perkins. IP Mobility Support. RFC 2002, IETF, 1996.Google Scholar
- I. Ramani, S. Savage. SyncScan: Practical fast handoff for 802.11 infrastructure networks. Infocom, 2005.Google ScholarCross Ref
- Raspberry Pi. Website.Google Scholar
- M. Shin, A. Mishra, W. Arbaugh. Improving the latency of 802.11 hand-offs using neighbor graphs. MobiSys, 2004.Google ScholarDigital Library
- Skype. Website.Google Scholar
- A. Snoeren, H. Balakrishnan. An end-to-end approach to host mobility. MobiCom, 2000. Google ScholarDigital Library
- H. Soroush, P. Gilbert, N. Banerjee, B. Levine, M. Corner, L. Cox. Concurrent Wi-Fi for mobile users: Analysis and measurements. CoNEXT, 2011.Google ScholarDigital Library
- Lenovo Thinkpad T430 laptop. Website.Google Scholar
- Tp-link N750 gigabit router. Website.Google Scholar
- D. Tse, P. Viswanath. Fundamentals of Wireless Communication. Cambridge University Press, 2005. Google ScholarCross Ref
- VideoLAN. Website.Google Scholar
- Y. Xie, Z. Li, M. Li. Precise power delay profiling with commodity Wi-Fi. ACM MobiCom, 2015.Google ScholarDigital Library
Index Terms
- Wi-Fi Goes to Town: Rapid Picocell Switching for Wireless Transit Networks
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