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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/14223

Title: Vehicular Massive Multiway Relay Networks Applying Graph-Based Random Access
Authors: Purwita, Ardimas Andi
Anwar, Khoirul
Keywords: Coded random access
Double irregular
Slotted ALOHA
Multiway Relay
Iterative Decoding
Issue Date: 2015-12
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Magazine name: 2015 IEEE Vehicular Networking Conference (VNC)
Start page: 227
End page: 234
DOI: 10.1109/VNC.2015.7385581
Abstract: Recent vehicular communications problems entail various aspects, such as rapidly changing topologies and large number of users. We consider massive uncoordinated multiway relay networks (mu-mRN) that can serve a massive number of users expecting to fully exchange information among them via a common multiway relay. Relay vehicular networks system is one of potential applications of the mu-mRN. In this paper, we are interested in improving normalized throughput T of the network using multiuser detection (MUD) capability of K > 1 based on the graph-based random access to flexibly adapt the topology changes. First, we present a network capacity bound of the mu-mRN with general K to investigate the theoretical limit of the networks. Then, we search for many optimal and practical degree distributions for each theoretical bound. Second, we aim to improve the normalized throughput by 10× from the maximum normalized throughput of conventional systems. To achieve the goal, we propose the mu-mRN applying doubly irregular coded slotted ALOHA. We also propose an optimal practical encoding of the mu-mRN to closely approach the target with finite number of users.
Rights: This is the author's version of the work. Copyright (C) 2015 IEEE. 2015 IEEE Vehicular Networking Conference (VNC), 2015, 227-234. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
URI: http://hdl.handle.net/10119/14223
Material Type: author
Appears in Collections:b11-1. 会議発表論文・発表資料 (Conference Papers)

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