878 research outputs found
Source Delay in Mobile Ad Hoc Networks
Source delay, the time a packet experiences in its source node, serves as a
fundamental quantity for delay performance analysis in networks. However, the
source delay performance in highly dynamic mobile ad hoc networks (MANETs) is
still largely unknown by now. This paper studies the source delay in MANETs
based on a general packet dispatching scheme with dispatch limit (PD-
for short), where a same packet will be dispatched out up to times by its
source node such that packet dispatching process can be flexibly controlled
through a proper setting of . We first apply the Quasi-Birth-and-Death (QBD)
theory to develop a theoretical framework to capture the complex packet
dispatching process in PD- MANETs. With the help of the theoretical
framework, we then derive the cumulative distribution function as well as mean
and variance of the source delay in such networks. Finally, extensive
simulation and theoretical results are provided to validate our source delay
analysis and illustrate how source delay in MANETs are related to network
parameters.Comment: 11page
A Study on Throughput and Delay Performance Analysis in Two-Hop Relay Mobile Ad Hoc Networks
Tohoku University加藤寧課
Thirty Years of Machine Learning: The Road to Pareto-Optimal Wireless Networks
Future wireless networks have a substantial potential in terms of supporting
a broad range of complex compelling applications both in military and civilian
fields, where the users are able to enjoy high-rate, low-latency, low-cost and
reliable information services. Achieving this ambitious goal requires new radio
techniques for adaptive learning and intelligent decision making because of the
complex heterogeneous nature of the network structures and wireless services.
Machine learning (ML) algorithms have great success in supporting big data
analytics, efficient parameter estimation and interactive decision making.
Hence, in this article, we review the thirty-year history of ML by elaborating
on supervised learning, unsupervised learning, reinforcement learning and deep
learning. Furthermore, we investigate their employment in the compelling
applications of wireless networks, including heterogeneous networks (HetNets),
cognitive radios (CR), Internet of things (IoT), machine to machine networks
(M2M), and so on. This article aims for assisting the readers in clarifying the
motivation and methodology of the various ML algorithms, so as to invoke them
for hitherto unexplored services as well as scenarios of future wireless
networks.Comment: 46 pages, 22 fig
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