ABSTRACT
The demand for wireless bandwidth in indoor environments such as homes and offices continues to increase rapidly. Although wireless technologies such as MIMO can reach link throughputs of 100s of Mbps (802.11n) for a single link, the question of how we can deliver high throughput to a large number of densely-packed devices remains an open problem. Directional antennas have been shown to be an effective way to increase spatial reuse, but past work has focused largely on outdoor environments where the interactions between wireless links can usually be ignored. This assumption is not acceptable in dense indoor wireless networks since indoor deployments need to deal with rich scattering and multipath effects. In this paper we introduce DIRC, a wireless network design whose access points use phased array antennas to achieve high throughput in dense, indoor environments. The core of DIRC is an algorithm that increases spatial reuse and maximizes overall network capacity by optimizing the orientations of a network of directional antennas. We implemented DIRC and evaluated it on a nine node network in an enterprise setting. Our results show that DIRC improves overall network capacity in indoor environments, while being flexible enough to adapt to node mobility and changing traffic workloads.
- SiBEAM: Wireless Beyond Boundaries (www.sibeam.com).Google Scholar
- Fidelity Comtech www.fidelity-comtech.com.Google Scholar
- IEEE 802.11n Draft.Google Scholar
- N. Ahmed, U. Ismail, S. Keshav, and K. Papagiannaki. Online estimation of RF interference. In CoNEXT, 2008. Google ScholarDigital Library
- L. Bao and J. J. Garcia-Luna-Aceves. Receiver-oriented multiple access in ad hoc networks with directional antennas. Wirel. Netw., 11(1-2), 2005. Google ScholarDigital Library
- M. Blanco, R. Kokku, K. Ramachandran, S. Rangarajan, and K. Sundaresan. On the effectiveness of switched beam antennas in indoor environments. In PAM, 2008. Google ScholarDigital Library
- G. Brar, D. M. Blough, and P. Santi. Computationally efficient scheduling with the physical interference model for throughput improvement in wireless mesh networks. In MobiCom, 2006. Google ScholarDigital Library
- K. Chebrolu and B. Raman. FRACTEL: a fresh perspective on (rural) mesh networks. In NSDR, 2007. Google ScholarDigital Library
- R. R. Choudhury and N. H. Vaidya. Deafness: A MAC problem in ad hoc networks when using directional antennas. ICNP, 2004. Google ScholarDigital Library
- R. R. Choudhury, X. Yang, R. Ramanathan, and N. H. Vaidya. Using directional antennas for medium access control in ad hoc networks. In MobiCom, 2002. Google ScholarDigital Library
- T. Cover and J. Thomas. Elements of Information Theory. J Wiley and Sons Inc, 1991. Google ScholarDigital Library
- D. Gesbert, M. Kountouris, R. Heath, C.-B. Chae, and T. Salzer. Shifting the MIMO paradigm. Signal Processing Magazine, IEEE, 2007.Google ScholarCross Ref
- P. Gupta and P. R. Kumar. The Capacity of Wireless Networks. In IEEE Trans. on Information Theory, 2000.Google ScholarDigital Library
- K. Jain, J. Padhye, V. N. Padmanabhan, and L. Qiu. Impact of interference on multi-hop wireless network performance. In MobiCom, 2003. Google ScholarDigital Library
- Y.-B. Ko, V. Shankarkumar, and N. H. Vaidya. Medium access control protocols using directional antennas in adhoc networks. In INFOCOM, 2000.Google Scholar
- T. Korakis, G. Jakllari, and L. Tassiulas. A MAC protocol for full exploitation of directional antennas in ad-hoc wireless networks. In MobiHoc, 2003. Google ScholarDigital Library
- R. Mahajan, M. Rodrig, D. Wetherall, and J. Zahorjan. Analyzing the MAC--level behavior of wireless networks in the wild. In SIGCOMM, 2006. Google ScholarDigital Library
- V. Navda, A. P. Subramanian, K. Dhanasekaran, A. Timm-Giel, and S. Das. MobiSteer: using steerable beam directional antenna for vehicular network access. In MobiSys, 2007. Google ScholarDigital Library
- R. K. Patra, S. Nedevschi, S. Surana, A. Sheth, L. Subramanian, and E. A. Brewer. WiLDNet: Design and implementation of high performance WiFi based long distance networks. In NSDI, 2007. Google ScholarDigital Library
- A. Prabhu and S. Das. Addressing deafness and hidden terninal problem in directional antenna based wireless multi-hop networks. COMSWARE, Jan. 2007.Google Scholar
- B. Raman and K. Chebrolu. Design and evaluation of a new MAC protocol for long--distance 802.11 mesh networks. In MobiCom, 2005. Google ScholarDigital Library
- N. K. Santhapuri, J. Manweiler, S. Sen, R. R. Choudhury, S. Nelakuditi, and K. Munagala. Message in Message MIM: A case for reordering transmissions in wireless networks. In HotNets, 2008.Google Scholar
- A. Sheth, S. Nedevschi, R. K. Patra, S. Surana, E. A. Brewer, and L. Subramanian. Packet loss characterization in WiFi-based long distance networks. In INFOCOM, 2007.Google ScholarDigital Library
- K. Sundaresan and R. Sivakumar. A unified MAC layer framework for ad-hoc networks with smart antennas. IEEE/ACM Trans. Netw., 15(3), 2007. Google ScholarDigital Library
- K. Sundaresan, W. Wang, and S. Eidenbenz. Algorithmic aspects of communication in ad--hoc networks with smart antennas. In MobiHoc, 2006. Google ScholarDigital Library
- M. Takai, J. Martin, R. Bagrodia, and A. Ren. Directional virtual carrier sensing for directional antennas in mobile ad hoc networks. In MobiHoc, 2002. Google ScholarDigital Library
- M. Vutukuru, K. Jamieson, and H. Balakrishnan. Harnessing exposed terminals in wireless networks. In NSDI, 2008. Google ScholarDigital Library
- Z. Zhang. DTRA: directional transmission and reception algorithms in WLANs with directional antennas for QoS support. Network, IEEE, 19(3), May-June 2005. Google ScholarDigital Library
Index Terms
- DIRC: increasing indoor wireless capacity using directional antennas
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