'Rts cts' diaporamas de présentation

A Bidirectional Multi-channel MAC Protocol for Multihop Wireless Ad Hoc Networks

A Bidirectional Multi-channel MAC Protocol for Multihop Wireless Ad Hoc Networks. Tianbo Kuang and Carey Williamson University of Calgary. Multi-Hop Wireless Ad Hoc Networks. S. A. C. B. D. R. Multi-Hop Wireless Ad Hoc Networks. S. A. C. B. D. R.

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Wireless LANs and IEEE 802.11 MAC

Wireless LANs and IEEE 802.11 MAC. CSE 6590 Winter 2012. Overview. Applications of Wireless LANs. Key application areas: LAN extension cross-building interconnect nomadic access ad hoc networking. Infrastructure Wireless LAN. Ad Hoc Networking.

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Wireless LANs

Wireless LANs. CSE 3213 Fall 2011. Overview. Applications of Wireless LANs. Key application areas: LAN extension cross-building interconnect nomadic access ad hoc networking. Infrastructure Wireless LAN. Ad Hoc Networking. temporary peer -to-peer network (no infrastructure).

866 views • 59 slides

Intuitions on Proportional Fairness

Intuitions on Proportional Fairness. Proportional fair rate. Proportional fair rate per unit charge. Relation between these two: replace users r by Wr identical sub-users, construct the proportionally fair allocation over all sub-users, and then provide to user r the aggregate rate

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Token Ring Overview

Token Ring Overview. Examples 16Mbps IEEE 802.5 (based on earlier IBM ring) 100Mbps Fiber Distributed Data Interface (FDDI). 8. 8. 48. 48. 8. 32. 24. Start of. Dest. Src. End of. Control. Body. CRC. Status. frame. addr. addr. frame. Token Ring (cont). Idea

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CPSC 689: Discrete Algorithms for Mobile and Wireless Systems

CPSC 689: Discrete Algorithms for Mobile and Wireless Systems. Spring 2009 Prof. Jennifer Welch. Lecture 3. Topics: MAC Protocols part 2 Sources: Schiller, Ch 1-3 Balakrishnan, Ch 11 Vaidya, Ch 1-2, 4-5 MIT 6.885 Fall 2008 slides. Reservation-Based Strategy. Used in MACA and MACAW.

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MAC Protocols for Ad Hoc Wireless Networks

MAC Protocols for Ad Hoc Wireless Networks. Wireless Interference. A radio interface either transmits or receives (half-duplex). A receiver must get a minimum SINR for successful reception This means no other transmitter (interferer) in vicinity. If untrue -> collision (SINR insufficient).

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CCH: Cognitive Channel Hopping in Vehicular Ad Hoc Networks

CCH: Cognitive Channel Hopping in Vehicular Ad Hoc Networks. Brian Sung Chul Choi, Hyungjune Im , Kevin C. Lee, and Mario Gerla UCLA Computer Science Department VTC 2011 Fall Presentation. Motivation. Wi-Fi based vehicular networks Each vehicle equipped with a Wi-Fi interface.

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Mid Term Review

Mid Term Review. Mid Term. Tue, April 1 Open Book Open papers Open laptop In class exam Duration 1hour 15 minutes Exam level Not too easy, not too hard 20% of total grade. Syllabus. Topic covered till March 27 (inclusive) Basic Networking

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Versatile Low Power Media Access for Wireless Sensor Networks

Versatile Low Power Media Access for Wireless Sensor Networks. Sarat Chandra Subramaniam. Goals. Low Power operation Effective collision avoidance Simple and predictable Small code size and RAM usage Tolerable to changing RF/networking conditions Scalable to large numbers of nodes.

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Date: 2013-11-12

MAC Simulation Results and Methodology (60GHz). Date: 2013-11-12. Presenter:. Authors/Supporters List. Authors/Supporters List. Proposal overview. This presentation is part and in support of the complete proposal described in 802.11-13/1301r0 (slides) and 802.11-13/1302r0 (text) that:

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Versatile low power media access for wireless sensor networks

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MAC for Dedicated Short Range Communications in Intelligent Transport System

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NDP Type PS-Poll Frame Follow-Up

NDP Type PS-Poll Frame Follow-Up. Authors:. Date: 2013-01-14. Authors :. Authors:. Background. STF. LTF1. SIG. TGah accepted to define a NDP type PS-Poll frame format as [1] However, details on each subfield are TBD.

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Short Beamforming Report Poll Frame

Short Beamforming Report Poll Frame. Date: 2012-0 7 -1 5. Authors:. Authors:. Authors:. Abstract. Short ACK and short CTS have been introduced to 802.11ah spec framework, with similar format design.

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Why we need Length Field in VHT SIG

Why we need Length Field in VHT SIG. Authors:. Date: 2010-05-17. Abstract. It has been proposed that, contrary to the structure adopted in 11n, the Length Field in VHT SIG is eliminated And the Length Field in L-SIG is used to signal the length of 11ac PPDU

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???? ?????? deafness ?????????? MAC ?????????

???? ?????? deafness ?????????? MAC ?????????. 2009/01/22( ? ) 7051-0100 ????. 1. 1 ????? (1/2). ?????????????? ???????????? ?????????? ?????????? ??????? ????????? ??? MAC ????? SWAMP(Smart Antennas Basesd Wider-range Access MAC) ?????????????????????????????????

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Urban Multi-Hop Broadcast Protocol for Inter-Vehicle Communication Systems

Data Engineering Laboratory, Aristotle University of Thessaloniki. Urban Multi-Hop Broadcast Protocol for Inter-Vehicle Communication Systems. ??????? ????????. VANET. Key features : Mobility rate is high Movement direction and speeds are predictable

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GORA: Goodput Optimal Rate Adaptation for 802.11 using Medium Status Estimation

Estimated P coll and P err , SNR=20 dB. Single user. 9 interferes. SNR=10dB. 3 interferes. GORA: Goodput Optimal Rate Adaptation for 802.11 using Medium Status Estimation. Nicola Baldo, Federico Maguolo, Simone Merlin, Andrea Zanella, Michele Zorzi. Diego Melpignano, David Siorpaes.

144 views • 1 slides