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Analysis of Spatio-Temporal Preferences and Encounter Statistics for DTN Performance [article]

Gautam S. Thakur, Udayan Kumar, Ahmed Helmy, Wei-Jen Hsu
2010 arXiv   pre-print
Spatio-temporal preferences and encounter statistics provide realistic measures to understand mobile user's behavioral preferences and transfer opportunities in Delay Tolerant Networks (DTNs).  ...  The time dependent behavior and periodic reappearances at specific locations can approximate future online presence while encounter statistics can aid to forward the routing decisions.  ...  For the purpose of our study, we also find that it best captures spatio-temporal preferences and encounter statistics.  ... 
arXiv:1007.0960v1 fatcat:por2xgpez5aclmseeiaou2wsay

On the efficacy of mobility modeling for DTN evaluation: Analysis of encounter statistics and spatio-temporal preferences

Gautam S. Thakur, Udayan Kumar, Ahmed Helmy, Wei-Jen Hsu
2011 2011 7th International Wireless Communications and Mobile Computing Conference  
In the areas of adhoc and delay tolerant networks (DTNs), recent work on mobility modeling focused on replicating metrics of encounter statistics and spatio-temporal preferences.  ...  We first analyze the characteristics of two well-established mobility models; the random direction and the time-variant community (TVC) models, and study whether they capture encounter statistics and preference  ...  Surprisingly, through systematic analysis, we find that even when mobility models reflect equivalent spatio-temporal and encounter statistics, they exhibit large DTN routing performance discrepancy with  ... 
doi:10.1109/iwcmc.2011.5982586 dblp:conf/iwcmc/ThakurKHH11 fatcat:lhiky747uncihapxiu5ilsc7re

Similarity analysis and modeling in mobile societies

Gautam S. Thakur, Ahmed Helmy, Wei-Jen Hsu
2010 Proceedings of the 5th ACM workshop on Challenged networks - CHANTS '10  
Such models are essential for the analysis, performance evaluation, and simulation of future DTNs.  ...  This measures the difference of the major spatio-temporal behavioral trends and can be used to cluster users into similarity groups or communities.  ...  In the second step, we extract relevant statistics of mobile user spatio-temporal patterns.  ... 
doi:10.1145/1859934.1859938 dblp:conf/mobicom/ThakurHH10 fatcat:kwmjfk2mr5h2bnfa3czxejl474

Similarity Analysis and Modeling in Mobile Societies: The Missing Link [article]

Gautam Thakur, Ahmed Helmy, Wei-Jen Hsu
2010 arXiv   pre-print
Such models are essential for the analysis, performance evaluation, and simulation of future DTNs.  ...  This measures the difference of the major spatio-temporal behavioral trends and can be used to cluster users into similarity groups or communities.  ...  For DTNs, on-line activity and mobility preferences translate into encounters that are used for opportunistic message forwarding, and this is the focus of our study rather than social relations per se.  ... 
arXiv:1006.2552v1 fatcat:wbr5sofq2rb6lmxna55bimhqfe

Analyzing Temporal Scale Behaviour of Connectivity Properties of Node Encounters

Karim Keramat Jahromi, Filipe Meneses, Adriano Moreira
2014 Procedia Computer Science  
Data about the usage of Wi-Fi networks can be exploited to analyze the patterns of encounters between pairs of mobile devices and then be extrapolated for other contexts.  ...  The knowledge about encounters' patterns among mobile nodes will be helpful for understanding the role and potential of mobile devices as relaying nodes.  ...  The majority of works on empirical analysis of node encounters [9, 10] are focused on extracting patterns and regularity of encounters without fundamental analyzing the role of spatio-temporal scale  ... 
doi:10.1016/j.procs.2014.10.031 fatcat:hehel5gkjzbb3hhi5ixy6kixta

Non-dominated Sorting Genetic Algorithm-II for Throwbox Deployment in Delay Tolerant Networks

2019 International journal of recent technology and engineering  
The simulation results are analyzed for better strategy in deploying throwboxes and to improve the performance of throwbox-augmented DTNs.  ...  Delay-tolerant networks (DTNs) are basically opportunistic networks and uses store-carry-and-forward switching for message forwarding.  ...  It makes abstraction of spatio-temporal preferences in human mobility preferred for DTN environment (Nguyen 2011) .  ... 
doi:10.35940/ijrte.d5323.118419 fatcat:bizyeyartjfo3mztdrkerp2ymq

PROTECT: Proximity-based Trust-advisor using Encounters for Mobile Societies [article]

Udayan Kumar, Gautam Thakur, Ahmed Helmy
2010 arXiv   pre-print
Two sets of statistical analyses are performed; the first examines the underlying encounter relationships in mobile societies, and the second evaluates DTN routing in mobile peer-to-peer networks using  ...  In our analysis for trust and selfishness model, our trust filters largely undo the effect of selfishness on the unreachability in a network.  ...  trust advisory filters based on encounter frequency, spatio-temporal statistics and similarity scores.  ... 
arXiv:1004.4326v1 fatcat:zoeguka6pnaf3fznkk6db25dli

SHIELD: Social sensing and Help In Emergency using mobiLe Devices

Gautam S. Thakur, Mukul Sharma, Ahmed Helmy
2010 2010 IEEE Global Telecommunications Conference GLOBECOM 2010  
Analysis of campus crime statistics and WLAN traces surprisingly show a strong positive correlation (over 55%) between on-campus crime statistics and spatiotemporal density distribution of on-campus mobile  ...  There is a need to exploit proximitybased help for immediate response and to deter any crime. In this paper, we propose SHIELD, an on-campus emergency rescue and alert management service.  ...  Crime Statistics and Mobile User Density: Next, we analyzed the past ten years of the crime log statistics of University of Florida to understand the spatio-temporal distribution of the incidences happened  ... 
doi:10.1109/glocom.2010.5683410 dblp:conf/globecom/ThakurSH10 fatcat:shapfa7werc3helk4prsvzgma4

STEPS - An Approach for Human Mobility Modeling [chapter]

Anh Dung Nguyen, Patrick Sénac, Victor Ramiro, Michel Diaz
2011 Lecture Notes in Computer Science  
STEPS makes abstraction of spatio-temporal preferences in human mobility by using a power law to rule the nodes movement.  ...  In this paper we introduce Spatio-TEmporal Parametric Stepping (STEPS) -a simple parametric mobility model which can cover a large spectrum of human mobility patterns.  ...  Time structure was build on the basis of night/day and days in a week to capture temporal preferences.  ... 
doi:10.1007/978-3-642-20757-0_20 fatcat:2pkmt4riarhhhizcjxyhmxehcq

Characterizing Pairwise Social Relationships Quantitatively: Interest-Oriented Mobility Modeling for Human Contacts in Delay Tolerant Networks

Jiaxu Chen, Yazhe Tang, Chengchen Hu, Guijuan Wang
2013 Journal of Applied Mathematics  
Exhaustive experiments are also conducted to show that IHC can predict well the performance of routing protocols.  ...  Human mobility modeling has increasingly drawn the attention of researchers working on wireless mobile networks such as delay tolerant networks (DTNs) in the last few years.  ...  Acknowledgment This work is supported by the National Natural Science Foundation of China (NNSFC) under Grant no. 61170245.  ... 
doi:10.1155/2013/597981 fatcat:2hqtw7ar3jflznto2xcjdf7wca

A Survey on Routing and Data Dissemination in Opportunistic Mobile Social Networks [article]

Behrouz Jedari, Feng Xia
2014 arXiv   pre-print
Then, a comparative review of state-of-the-art routing and data dissemination algorithms for MSNs is presented, with special attention paid to critical issues like context-awareness and user selfishness  ...  Secondly, properties of human mobility models are discussed and recently proposed mobility models are surveyed. Thirdly, community detection and evolution analysis algorithms are investigated.  ...  of their movement based on their popularity among all nodes and their distance from the home point. × √ × - √ √ × √ √ STEPS [51] Makes abstraction of spatio-temporal preferences in human mobility by using  ... 
arXiv:1311.0347v4 fatcat:kdyyz4ibwjfp3f4y7rougndyei

A Survey of Delay Tolerant Networks Routing Protocols [article]

Zhenxin Feng, Kwan-Wu Chin
2012 arXiv   pre-print
Apart from that, we review research that aims to exploit studies on social networks and epidemiology in order to improve routing protocol performance.  ...  Therefore, there is a need to review state-of-the-art routing protocols, categorize them, and compare and contrast their approaches in terms of delivery rate, resource consumption and end-to-end delay.  ...  Statistical Proactive routing protocols rely on past or historical information such as temporal, spatial and nodes performance.  ... 
arXiv:1210.0965v1 fatcat:pgjt6jacdnc53iondhowfcat6a

Achieving Throughput via Fine-Grained Path Planning in Small World DTNs [article]

Dhrubojyoti Roy and Mukundan Sridharan and Satyajeet Deshpande and Anish Arora
2019 arXiv   pre-print
We explore the benefits of using fine-grained statistics in small world DTNs to achieve high throughput without the aid of external infrastructure.  ...  We describe one such routing framework, REAPER (for Reliable, Efficient and Predictive Routing), that is fully distributed and self-stabilizing.  ...  We introduce a temporal frame-based approach for DTN routing.  ... 
arXiv:1902.06371v1 fatcat:mxgxkjqegzhc7owccjdex6v3i4

Tensor-Based Link Prediction in Intermittently Connected Wireless Networks [article]

Mohamed-Haykel Zayani, Vincent Gauthier, Ines Slama, Djamal Zeghlache
2011 arXiv   pre-print
In this paper, we propose a temporal link prediction technique for DTN which quantifies the behavior similarity between each pair of nodes and makes use of it to predict future links.  ...  Our prediction method keeps track of the spatio-temporal aspects of nodes behaviors organized as a third-order tensor that aims to records the evolution of the network topology.  ...  Acknowledgements We want to thank wholeheartedly Evrim Acar, Dimitrios Katsaros, Walid Benameur and Rachit Agarwal for their valuable comments and helpful advice.  ... 
arXiv:1108.2606v1 fatcat:kf4tjh6iq5dpvizrgb373qkala

Discovering trustworthy social spaces

Udayan Kumar, Ahmed Helmy
2012 Proceedings of the Third International Workshop on Sensing Applications on Mobile Phones - PhoneSense '12  
We find that a statistically strong relationship exists between our recommendation and social relationship with the devices rated by the users (for LVC, r=0.84, p <0.01).  ...  We propose a set of 4 filters to rate and rank mobile encounters identifying users with similar behavior.  ...  The last two filters use spatio-temporal encounter data (combine location information with encounters) when measuring count and duration, thus providing location based behavioral similarity/homophily.  ... 
doi:10.1145/2389148.2389155 fatcat:bkqhpcnp4ng5niu6pgcibibmdi
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