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Reliability Trade-off Analysis of Deadline-Sensitive Wireless Messaging Systems

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Title: Reliability Trade-off Analysis of Deadline-Sensitive Wireless Messaging Systems
Author(s): Fesehaye, Debessay; Ahmed, Shameem; Pongthawornkamol, Thadpong; Nahrstedt, Klara; Wang, Guijun
Subject(s): XMPP, Reliability, Mobile Wireless
Abstract: The need for deadline-sensitive messaging systems is growing fast with the growth in the number of mobile and static devices communicating with each other. With many such devices from different locations exchanging messages over a network, understanding the reliability of message delivery so as to cost-effectively improve it becomes challenging. The analysis is even more challenging and complex when some or most of the nodes are moving at different speeds following different mobility patterns and when the network is wireless. In this paper we present a reliability trade-off analysis for the exchange of messages between nodes under different mobility scenarios and various parameters using simulation. Some of the nodes in our study are message servers which are responsible for the control and delivery (relay) of messages from one client node to another client node. Among other things, our simulation results show that a message reliability of greater than 75% can be obtained using a method of smart server selection and more servers or a higher transmission range if the servers are not moving. However with a method of random server selection or if servers are moving a 75% message reliability cannot be achieved even using more servers and a higher range. The higher the packet sending rate by the clients, the higher the file reliability ( specially for bigger files and smaller transmission ranges). For chat messaging, the reliability usually increases as the speed of the nodes (clients) increases.
Issue Date: 2011-03-23
Genre: Technical Report
Type: Text
Language: English
URI: http://hdl.handle.net/2142/18753
Publication Status: published or submitted for publication
Peer Reviewed: not peer reviewed
Date Available in IDEALS: 2011-03-23
 

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