Results 141 to 150 of about 631 (174)
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ACM SIGCOMM Computer Communication Review, 2004
The past decade has seen communication revolution in the form of cellular telephony as well as the Internet, but much of it has been restricted to the developed world and metro pockets in the developing world. While the use of cellular technologies can cut down on the time to deploy access networks, the cost economics make this non-viable in growing ...
Pravin Bhagwat +2 more
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The past decade has seen communication revolution in the form of cellular telephony as well as the Internet, but much of it has been restricted to the developed world and metro pockets in the developing world. While the use of cellular technologies can cut down on the time to deploy access networks, the cost economics make this non-viable in growing ...
Pravin Bhagwat +2 more
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On the Fidelity of 802.11 Packet Traces
2008Packet traces from 802.11 wireless networks are incomplete both fundamentally, because antennas do not pick up every transmission, and practically, because the hardware and software of collection may be under provisioned. One strategy toward improving the completeness of a trace of wireless network traffic is to deploy several monitors; these are ...
Aaron Schulman, Dave Levin, Neil Spring
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802.11 with multiple antennas for dummies
ACM SIGCOMM Computer Communication Review, 2010The use of multiple antennas and MIMO techniques based on them is the key feature of 802.11n equipment that sets it apart from earlier 802.11a/g equipment. It is responsible for superior performance, reliability and range. In this tutorial, we provide a brief introduction to multiple antenna techniques.
Daniel Halperin +3 more
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The capacity of VoIP over 802.11
Bell Labs Technical Journal, 2007As Voice over IP (VoIP) technology becomes a reality, service providers will be able to offer enhanced VoIP applications not presently possible with circuit-switched type networks. Combining new applications and services with the IP Multimedia Subsystem (IMS) network will increase revenue potential. The combination of wireless local area network (WLAN)
Santosh Abraham +3 more
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Understanding the Performance of 802.11 Networks
2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications, 2008In this paper, we review the most important performance characteristics of the 802.11 DCF wireless networks, point out some false common knowledge, and report on recent improvements.
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Adaptive System for 802.11 Scanning
IEEE INFOCOM Workshops 2009, 2009In this context, a mobile user may deal with a high variety of scenarios. These scenarios consist on heterogeneous access point (AP) deployments characterized by overlapping frequencies, traffic load and high interference. Moreover, these conditions cannot be anticipated by the mobile user while moving between APs and thus an appropriate scanning ...
Montavont, Nicolas, Castignani, German
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Differentiation mechanisms for IEEE 802.11
Proceedings IEEE INFOCOM 2001. Conference on Computer Communications. Twentieth Annual Joint Conference of the IEEE Computer and Communications Society (Cat. No.01CH37213), 2002The IETF is currently working on service differentiation in the Internet. However, in wireless environments where bandwidth is scarce and channel conditions are variable, IP differentiated services are sub-optimal without lower layers' support. We present three service differentiation schemes for IEEE 802.11.
Imad Aad, Claude Castelluccia
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Fairness Enhancement for 802.11 MAC
2010Location dependency and its associated exposed receiver problem create the most severe unfairness scenario of the CSMA/CA protocol. An analytical model is built up to study the success probabilities of RTS reception and RTS/CTS handshake of the typical disadvantaged link under the exposed receiver scenario.
Caishi Huang +2 more
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Seamless handover in 802.11 networks
2012 5th Joint IFIP Wireless and Mobile Networking Conference (WMNC), 2012This paper defines new architecture for fast handover in WiFi networks based on the idea of Personal AP and centralized management. New enterprise solutions achieve their limits for real-time multimedia communication, but they are in general expensive and not widely deployed.
Jan Balazia, Ivan Kotuliak
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Comprehensive Analysis of the IEEE 802.11
Mobile Networks and Applications, 2005Wireless Local Area Networks (WLANs) have attracted significant research interest over the past few years. The IEEE 802.11 standard is the most mature technology for WLANs and has been widely adopted for wireless networks. This paper outlines a new performance analysis for IEEE 802.11 Distributed Coordinated Function (DCF) using Direct Sequence Spread ...
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