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Space Information Flow (SIF) is a new promising research field which studies network coding in geometric space, such as Euclidean space. The design of an algorithm that computes the optimal SIF solutions remains one of the key open problems in SIF. This work proposes a new heuristic SIF algorithm that computes the optimal min-cost in multicast networks for any given number of terminal nodes in 2-D...
In this paper, we investigate a joint subcarrier- relay assignment and power allocation scheme for amplify-and- forward (AF) based two-way multi-relay networks. We formulate a sumrate maximization optimization problem with individual power constraints on each node. The target is to seek a unified optimalscheme for subcarrier-relay assignment and power allocation. The problem turns out a mixed integer...
In this paper, a novel remapping design for multiway relay system with multi-user (MU) is presented. Every user exchanges information with its partners via the relay. The two communication terminals have different modulation schemes according to their individual channel quality.We term this system an adaptive modulation asymmetric multi-way relaying networks, in which signal space alignment for network...
In this paper, we study the two-way relay channel (TWRC) with multi-user (MU), each of which exchanges information with its partners via a common access relay. All users are divided into two groups. Every user exchanges messages with each user in the other group. The two communication terminals use different modulation schemes. We term this system an asymmetric multi-pair two-way relay X channel (TWRXC),...
In this paper, we propose a scheme to maintain a communication link through the use of a communication relay chain in sparse mobile robot ad hoc networks. The scheme consists of three kinds of robots: a task robot, following robots and communication relay robots. The task robot performs predefined tasks; the following robots follow the task robot in a line formation; and the relay robots stop at given...
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