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We describe an approach to improving network performance in networks with heterogeneous links - for example, a communications network constructed from satellite links, airborne relays, and line-of-site radios - using disruption tolerant networking. DTN defines an overlay network that uses storage at each hop to make end-to-end communications resilient to delay, loss, network disruption, temporary...
Internet Relay Chat (IRC) is a critical application in military networks for maintaining situational awareness and conducting battle management at all echelons. But these networks are often subject to frequent disconnections, limited bandwidth, and long delays, especially when using satellite services and field radios. Such conditions are inhospitable to TCP, and thus the standard IRC protocol, which...
We exploit the capacity approaching capability of low density parity check (LDPC) codes to design coding schemes for relay channels. We consider the classical relay channel model, and the use of both full-duplex relays and half-duplex ones. In addition to the design of practical coding schemes and the development of the appropriate receiver structures, we also exploit the use of average mutual information...
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