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The paper contributes to the development of a framework concerning the teletraffic modeling and analysis of peer-to-peer systems that are based on a mesh-pull architecture. We look at the packet transmission processes induced by a swarm of peers disseminating multimedia objects. We provide a survey on some statistical techniques that are used to characterize the observed hierarchical popularity structure...
We propose an analytical model for data diffusion time/delay in a wireless mobile network using a novel peer-to-peer spatial-demand based information dissemination technique. The demand-based technique for data dissemination is beneficial for mobile network since this fully distributed and scalable network system utilizes only local urge for data and provides faster delivery of information. However,...
We propose a novel trust and probabilistic node selection mechanism for content distribution in mobile ad hoc networks, which aims to achieve trustworthy node selection and to preserve mobile node resources. The proposed mechanism is evaluated against selected alternative trust schemes, with the results showing that our proposal achieves its goals.
In this paper, an analytic model is built to derive a closed form broadcast packet reception rates in IEEE 802.11 based two-dimensional (2-D) mobile ad-hoc networks (MANETs), which is the extension of 1-D MANET analytical model in [4]. The analytic model takes two straight parallel line geometry, IEEE 802.11 backoff counter process, hidden terminal problem, message arrival interval, and fading transmission...
Link duration is a main factor in determining the transmission capacity between two encounter nodes in Delay Tolerant Networks (DTNs). Existing research on DTN transmission capacity usually assumes that a node is able to immediately discover the nodes which move into its transmission range. Under this assumption, the link duration in DTNs is determined by the moving speed and transmission distance...
Content sharing using personal web pages, blogs, or online social networks is a common means for people to maintain contact with their friends, colleagues, and acquaintances. While such means are essential to overcome distances, using infrastructure services for location-based services may not be desirable. In this paper, we analyze a fully distributed variant of an ephemeral content sharing service,...
Our physical environment is a natural storage where we can store and share information. For instance, a stop sign is a piece of information implanted in a particular location. In this paper, we propose a storage underlay platform called “ELIAS” (Every Location Is A Storage) for a mobile peer-to-peer system. ELIAS enables user applications to transparently save/retrieve data items to/from a location...
This paper presents a distributed proxy solution that enables energy efficient BitTorrent downloads for mobile devices. Instead of using a single proxy, this work focuses on using multiple proxy servers to achieve better bandwidth utilization and thus smaller mobile energy consumption. We present an analytical model that can be used to experiment with different proxy setup and evaluate them from the...
In delay tolerant network, message delivery can be inspired by biological communication models in realizing encountering and delivering. One way of communications can be through "thrown box" where the messages can be left and collected by different nodes in mimicking pheromone-based communications. In thrown box based model, the box is viewed as message relay and the delivery rate is enhanced...
Infostation communication is an innovative communication paradigm thought to provide connectivity in isolated areas. In infostation communications, wireless ports are deployed to act as gateways between the remote users and the communication infrastructure. However, users are allowed to exchange data with the infrastructure only when in the coverage area of one of them. In order to provide further...
In this paper, we derive the general expressions of the throughput capacity scaling of mobile ad hoc networks (MANETs), and find that the strategy of an individual node determines the throughput of an MANET. We show that optimal strategies that maximize the throughput of the network can exist. Based on a game theoretic approach, we further show that the optimal strategies constitute Nash equilibria.
It has been recently shown that the instantaneous average node speed for the random waypoint (RWP) mobility model may not reach a steady state regime due to velocity gradual decaying which can cause inaccurate results in simulations and communication protocol validations for mobile ad hoc networks (MANETs). This paper presents a modification to the RWP model, in which we propose to choose node speeds...
In this paper, we study the performance of opportunistic content distribution in a delay-tolerant network (DTN). Our primary interest is the benefit of node cooperation on the content dissemination and we investigate thoroughly how different levels of cooperation affect the content delivery delay. The evaluation is based on two complementary approaches, analytical stochastic models (Markov chains)...
In this work, we study the target detection and tracking problem in mobile sensor networks, where the performance metrics of interest are probability of detection and tracking coverage, when the target can be stationary or mobile and its duration is finite. We propose a physical coverage-based mobility model, where the mobile sensor nodes move such that the overlap between the covered areas by different...
In this paper, we consider a rural infostation system where power and bandwidth limited infostations are deployed in a large network area with sparsely populated mobile nodes. Direct transmission services are provided to each mobile node, whereas message dissemination services facilitated by relaying are provided to a subgroup of mobile nodes. We investigate radio resource allocation at infostations,...
Using 802.11b as a bearer this paper presents a simple one dimensional mobility model for the evaluation of fall-back communications protocols in medium range point to point communications systems. The technique provides link state data and is based on radio communication between carriages in a lift. Example throughputs for 802.11b are presented. Applications are Ad-hoc networks and in particular...
Consider a wireless network of two tiers with different priorities: a primary tier and a secondary tier, which is an emerging network scenario with the advancement of cognitive radio technologies. The primary tier is constructed over static nodes of density n, which are randomly distributed and have an absolute priority to access the spectrum. The secondary tier contains mobile nodes of density m...
Multimedia group communication services in mobile networks as a replacement for traditional trunked radio communication have attracted a lot of attention recently. This paper presents results from a newly developed simulation model to study the transfer of multimedia streams in group communication systems within different setups. As the real time ability of such a system has been identified as the...
With regard to the fundamental problem of the MANET routing protocols, this paper according to the campus mobile node behavior, expands the Campus Wireless Mobile Model, puts forward a Campus Wireless Low-Speed Mobile Model who based on AOC autonomous system. This paper does simulation experiment through NS-2 simulation platform, showing that in this model both DSR and AODV routing protocols are relatively...
In this paper, we analyze a new type of delay tolerant networks (DTN) where each node owns multiple dedicated messengers, called pigeons. The only form of inter- node communication is for a pigeon to periodically carry a batch of messages originated at the home node, deliver to the corresponding destination nodes and return home. We name this as homing-pigeon (HoP) based routing mechanism, which is...
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