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2011

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– We consider the binary consensus problem where each node in the network initially observes one of two states and the goal for each node is to eventually decide which one of the two states was initially held by the majority of the nodes. Each node contacts other nodes and updates its current state based on the state communicated by the last contacted node.… (More)

— We investigate source coding in a cascade communication system consisting of an encoder, a relay and an end terminal, where both the relay and the end terminal wish to reconstruct source X with certain fidelities. Additionally, side-informations Z and Y are available at the relay and the end terminal, respectively. The side-information Z at the relay is a… (More)

— Consider a network of nodes where each node has a message to communicate to all other nodes. For this communication problem, we analyze a gossip based protocol where coded messages are exchanged. This problem was studied in [4] where a bound to the dissemination time based on the spectral properties of the underlying communication graph is provided. Our… (More)

—We study packet streaming over an erasure channel with delayed feedback. We consider the lag in playback between the sender and the receiver as the performance criterion and propose and analyze schemes to minimize the lag. We show that at lower delays in feedback, purely retransmission based schemes are better than random linear coding schemes and also… (More)

—We define the " reordering channel " which approximates packet communication over multipath networks. We consider deterministic packet arrivals with finite horizon decoding of individual packets and analyze the error probability for a two stage coding scheme.

—We consider the problem of scheduling jobs with given start and finish times over two classes of multiuser channels , namely Multiple Access Channels and Degraded Broadcast Channels, and derive necessary and sufficient conditions for feasible scheduling of the jobs.

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