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IC3N '98 Proceedings of the International Conference on Computer Communications and Networks
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Multicast in 802.11 WLANs: an experimental study
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HOTMOBILE '07 Proceedings of the Eighth IEEE Workshop on Mobile Computing Systems and Applications
IEEE/ACM Transactions on Networking (TON)
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IEEE Transactions on Mobile Computing
3G Evolution, Second Edition: HSPA and LTE for Mobile Broadband
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ICMCS '99 Proceedings of the 1999 IEEE International Conference on Multimedia Computing and Systems - Volume 02
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AINA '09 Proceedings of the 2009 International Conference on Advanced Information Networking and Applications
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NSDI'07 Proceedings of the 4th USENIX conference on Networked systems design & implementation
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LCN '10 Proceedings of the 2010 IEEE 35th Conference on Local Computer Networks
HMAN: Hierarchical Monitoring for Ad Hoc Network
EUC '11 Proceedings of the 2011 IFIP 9th International Conference on Embedded and Ubiquitous Computing
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IEEE Communications Magazine
The IEEE 802.11s Extended Service Set Mesh Networking Standard
IEEE Communications Magazine
A simple transmit diversity technique for wireless communications
IEEE Journal on Selected Areas in Communications
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IEEE Journal on Selected Areas in Communications
The IEEE 802.11g standard for high data rate WLANs
IEEE Network: The Magazine of Global Internetworking
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Broadcast scenarios, such as streaming HD video to one or many clients, seem as a natural fit for the wireless medium, and indeed the two couple well in satellite TV networks. The same kind of compatibility with broadcast may be expected from modern Wi-Fi networks featuring extended-range Access Points (APs). Yet, the 802.11 protocol was not designed with video broadcast in mind, and therefore lacks crucial broadcast mechanisms, most notably, dynamic rate-adaptation and efficient Forward Error Correction (FEC). For satisfactory Quality of Experience (QoE), it is important that the video stream reaches its destination in time and with a minimal amount of errors. Therefore, in live broadcast, retransmissions should generally be avoided, a goal that can only be accomplished using a reliable feedback mechanism that informs transmitters of current packet loss rates. In this paper we present a live video transmission model for Wi-Fi MANET networks that dynamically adapts the streams' FEC overhead, by utilizing the fact that in Wi-Fi MANET all nodes are periodically broadcasting beacon frames. By overloading these beacons with packet loss-rate information, the transmitting nodes are able to adapt the rate of FEC-encoded redundant packets, the transmission rate and the modulation scheme, without relying on Wi-Fi ACK frames that are costly and inadequate for broadcast scenarios. Moreover, using beacon frames that are part of the 802.11 standard eliminates the overhead associated with proprietary feedback packets in alternative models of broadcast over Wi-Fi. Thus, our suggested scheme enables Wi-Fi MANET networks to reliably transmit live video over multiple hops. Using NS-3 simulations we validate that our FEC adaptation model is applicative and efficient over one hop. Thereafter, we demonstrate via theoretical analysis the tolerable delay associated with the transmission of video over multiple hops using a pipeline model.