Proceedings ArticleDOI
Real-time status updating: Multiple sources
Roy D. Yates,Sanjit K. Kaul +1 more
- pp 2666-2670
TLDR
A status-age timeliness metric is formulated and the region of feasible average status ages for a pair of updating sources is found and the existence of an optimal rate at which a source should generate its updates is shown.Abstract:
We examine multiple independent sources providing status updates to a monitor through a first-come-first-served M/M/1 queue. We formulate a status-age timeliness metric and find the region of feasible average status ages for a pair of updating sources. In the presence of interfering traffic with a given offered load, we show the existence of an optimal rate at which a source should generate its updates.read more
Citations
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Journal ArticleDOI
Update or Wait: How to Keep Your Data Fresh
TL;DR: In this paper, the authors study how to optimally manage the freshness of information updates sent from a source node to a destination via a channel and develop efficient algorithms to find the optimal update policy among all causal policies and establish sufficient and necessary conditions for the optimality of the zero-wait policy.
Journal ArticleDOI
On the Age of Information in Status Update Systems With Packet Management
TL;DR: A communication system in which status updates arrive at a source node, and should be transmitted through a network to the intended destination node, using the queuing theory, and it is assumed that the time it takes to successfully transmit a packet to the destination is an exponentially distributed service time.
Journal ArticleDOI
The Age of Information: Real-Time Status Updating by Multiple Sources
Roy D. Yates,Sanjit K. Kaul +1 more
TL;DR: An age of information timeliness metric is formulated and a general result for the AoI that is applicable to a wide variety of multiple source service systems is derived that makes AoI evaluation to be comparable in complexity to finding the stationary distribution of a finite-state Markov chain.
Book
Age of Information: A New Concept, Metric, and Tool
TL;DR: This monograph provides the reader with an easy-to-read tutorial-like introduction into this novel approach of dealing with information within systems and shows how the approach can be used as a tool in improving metrics in other contexts.
Journal ArticleDOI
Scheduling Policies for Minimizing Age of Information in Broadcast Wireless Networks
TL;DR: In this article, the authors consider a wireless broadcast network with a base station sending time-sensitive information to a number of clients through unreliable channels and formulate a discrete-time decision problem to find a transmission scheduling policy that minimizes the expected weighted sum AoI of the clients in the network.
References
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Book
Probability, random variables and stochastic processes
TL;DR: This chapter discusses the concept of a Random Variable, the meaning of Probability, and the axioms of probability in terms of Markov Chains and Queueing Theory.
Proceedings ArticleDOI
Wireless sensor networks for habitat monitoring
TL;DR: An in-depth study of applying wireless sensor networks to real-world habitat monitoring and an instance of the architecture for monitoring seabird nesting environment and behavior is presented.
Proceedings ArticleDOI
Real-time status: How often should one update?
TL;DR: A time-average age metric is employed for the performance evaluation of status update systems and the existence of an optimal rate at which a source must generate its information to keep its status as timely as possible at all its monitors is shown.