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Unpredictable node mobility, low node density, and lack of global information make it challenging to achieve effective data forwarding in Delay-Tolerant Networks (DTNs). Most of the current data forwarding schemes choose the nodes with the best cumulative capability of contacting others as relays to carry and forward data, but these nodes may not be the best relay choices within a short time period...
With the rapid growth of wireless and mobile communication technology, P2P live streaming application is extending to mobile peers. In order to prevent Buffer Map Cheating (BMC) attacks in mobile P2P live streaming system, we model the chunks exchanging behavior between neighboring mobile peers under an infinitely repeated two-player game theoretic framework. The Nash Equilibrium is refined based...
In opportunistic networks, mobile nodes such as mobile phones and PDAs use the mobility of devices in addition to wireless forwarding between intermediate nodes to facilitate communication without requiring a simultaneous path between source and destination.Without guaranteed connectivity, the strategy for forwarding messages has a significant effect on system performance. Most of the existing research...
The coupling of scale-free networks with mobile unstructured networks is certainly unusual. In mobile networks, connections active at a given instant are constrained by the geographical distribution of mobile nodes, and by the limited signal strength of the wireless technology employed to build the ad-hoc overlay. This is in contrast with the presence of hubs, typical of scale-free nets. However,...
Federating partitioned Wireless Sensor Networks (WSNs) in Outdoor Environment Monitoring (OEM), where the deployed sensor nodes are prone to significant damage and harsh operational conditions, becomes a necessity to prolong the WSN lifetime. Consequently, redundancy-based deployment strategies have been extensively studied in the literature. However, federating WSNs using node redundancy is expensive...
In this paper, we study the capacity and delay scaling laws for cognitive radio networks (CRN). The primary network consists of static, randomly and evenly distributed primary users (PUs), which require high throughput with low delay. The secondary network consists of $m=O(n^{1+\delta})$ randomly and evenly distributed cognitive secondary users (SUs) with $\delta>0$, which move in different area...
With the tremendous increase in mobile data traffic, system capacity considerations are no longer the primary and only concern to optimize for in cellular networks. The step increase in utilization of cellular networks not only has shorten the recharging cycle of mobile terminals but has further caused a considerable rise in the operators' energy bill. It has therefore become imperative for the sustainable...
Heterogeneous networks utilizing relay nodes with low transmission power becomes an important deployment scenario in 4G cellular standards. It can offer high data rate delivery as well as ubiquitous end-user experience. For such a network, an efficient mobile association and load balancing scheme is critical to achieve high system capacity and satisfactory user experience. In this paper, the main...
Mobility plays an important role in the message transmission of Disruption Tolerant Networks (DTNs), and we need to control the mobility of nodes around the network to efficiently carry and relay messages around the network. This is a challenging problem since the nodes in the network may move arbitrarily and it is hard for us to determine how the nodes should move, faster or slower, to help with...
The multi-hop cellular network (MCN) is an evolved paradigm for mobile communications, which integrates the ad hoc characteristics into the conventional cellular systems. Similar to ad hoc networks, the performance of MCNs relies on the hypothesis that each node accepts to forward traffic for the benefit of others, which may not hold with the possible presence of selfish users. In order to stimulate...
This paper investigates the {\em access time} of mobile nodes to infrastructure networks in Mobile Hybrid Networks (MHNs), e.g., sensor-actuator networks, where mobile nodes move around the coexisting infrastructure networks. In such networks, mobile nodes may relay data packets in a hop-by-hop fashion, and eventually deliver packets to the wired networks. Our objective is to study the lower bound...
Heterogeneous cellular networks have emerged as a new paradigm in the wireless network to increase cellular capacity and coverage. Future heterogeneous networks will have a mixed deployment of high power and low power nodes. This creates complicated interference scenarios that require more tight resource coordination among neighbouring nodes than in the traditional cellular networks. In this paper...
Abstract: This paper looks into the problems faced by Underwater Sensor Networks (UWSNs), with regard to energy optimization and efficient data delivery. A new algorithm is proposed which uses the properties of a "Parabola" in order to transmit data packets from source to destination. The scheme is called the "Parabola-based Routing"(PBR) algorithm. The algorithm is adaptive, and...
The current Mobile wireless systems, such as GSM, UMTS, HSPA, LTE and WiMAX, are based on “Cell Concentration” concept comprise of 2 main parts: Radio Access Network (RAN) and Core Network (CN). RAN provides radio bearers between the core network and the mobile station in the field for the transport of user data, Signaling and Management messages, thus enabling mobile stations to access the different...
Mobile devices have become ubiquitous, allowing the integration of new information from a big range of objects. But the development of new applications requires a powerful framework which simplifies their construction. JXME is the JXTA protocols implementation for mobile devices using J2ME. The main value of JXME is its simplicity when creating peer-to-peer (P2P) applications on limited devices. However,...
In Mobile Ad-hoc Networks (MANET), the nodes intercommunicate through single-hop and multi-hop paths in a peer-to-peer fashion. Intermediate nodes between two pairs of communication nodes act as routers. Thus, the routing protocols play an important role for construction of MANET. Though the research of the routing protocol for MANET is actively done, most performance evaluations are evaluated via...
Many investments are being made in vehicular networking due to social and technological benefits that comes with the development of services and applications for the community, including safety issues. Vehicular Delay-Tolerant Networks (VDTNs) appear as innovative network architecture, able to outline communication challenges caused by issues like variable delays, disruption and intermittent connectivity...
Among the techniques proposed to reduce interference in cellular ODFMA networks, base station cooperation (BSC) is currently the technique known to achieve the highest network throughputs. Its deployment however is vastly expensive and cheaper alternatives are expected to play an important role in future wireless access standards. This contribution introduces relay-augmented networks based on the...
The 2-hop relay algorithm and its variants have been attractive for ad hoc mobile networks, because they are simple yet efficient, and more importantly, they enable the capacity and delay to be studied analytically. This paper considers the 2-hop relay with $f$-cast (2HR-$f$) under i.i.d. mobility model, a general 2-hop relay algorithm that allows one packet to be delivered to at most distinct relay...
To provide live streaming service to mobile users, traditionally each user pulls content from a server over his cellular network. In order to overcome the scalability problem of last-hop bandwidth bottleneck, mobile peer-to-peer (P2P) streaming can be used where mobile devices relay their stream received in a multi-hop manner by means of a secondary channel (such as Wi-Fi or bluetooth). We investigate...
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