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Abstract The link quality variation of wireless channels hasbeen a challenging issue in data communications until recentexplicit exploration in utilizing this characteristic. The samebroadcast transmission may be perceived significantly differently,and usually independently, by receivers at different geographiclocations. Furthermore, even the same stationary receiver mayexperience drastic link quality fluctuation over time. The combinationof link-quality variation with the broadcasting nature ofwireless channels has revealed a direction in the research of wirelessnetworking, namely, cooperative communication. Researchon cooperative communication started to attract interests in thecommunity at the physical layer but more recently its importanceand usability have also been realized at upper layers of thenetwork protocol stack. In this article, we tackle the problemof opportunistic data transfer in mobile ad hoc networks.
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CORMAN: A Novel Cooperative Opportunistic Routing
Scheme in Mobile Ad Hoc Networks Abstract
The link quality variation of wireless channels has been a challenging issue in
data communications until recent explicit exploration in utilizing this characteristic. The
same broadcast transmission may be perceived significantly differently, and usually
independently, by receivers at different geographic locations. Furthermore, even the
same stationary receiver may experience drastic link quality fluctuation over time. The
combination of link-quality variation with the broadcasting nature of wireless channels
has revealed a direction in the research of wireless networking, namely, cooperative
communication. Research on cooperative communication started to attract interests in
the community at the physical layer but more recently its importance and usability have
also been realized at upper layers of the network protocol stack. In this article, we tackle
the problem of opportunistic data transfer in mobile ad hoc networks. Our solution is
called Cooperative Opportunistic Routing in Mobile Ad hoc Networks (CORMAN). It is
a pure network layer scheme that can be built atop off-the-shelf wireless networking
equipment. Nodes in the network use a lightweight proactive source routing protocol to
determine a list of intermediate nodes that the data packets should follow en route to
the destination. Here, when a data packet is broadcast by an upstream node and has
happened to be received by a downstream node further along the route, it continues its
way from there and thus will arrive at the destination node sooner. This is achieved
through cooperative data communication at the link and network layers. This work is a
powerful extension to the pioneering work of ExOR. We test CORMAN and compare it
to AODV, and observe significant performance improvement in varying mobile
settings.
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![Opportunistic Data Gathering and Dissemination in Urban ...amsdottorato.unibo.it/6512/1/bujari_armir_tesi.pdf · Mobile Ad hoc NETworks (MANETs [21]) have emerged as viable networking](https://img.pdfslide.us/doc/110x75/5f82ae4d9ce2596f2c3d780b/opportunistic-data-gathering-and-dissemination-in-urban-mobile-ad-hoc-networks.jpg)
