exposure in wireless ad hoc sensor networks pdf

... and critical task in wireless sensor networks. Existing major routing protocols for wireless sensor net- works include LEACH [1], Directed Diffusion [2], Dynamic Source Routing (DSR) [3], Ad hoc on Demand ... multipath routing depending on how many paths are reinforced by sink node. DSR, AODV, Gossiping, and SPIN are single-path routing protocols for ad hoc topology wireless sensor networks. Most of the ... source routing in ad hoc wireless networks, ” in Mobile Computing,T.Imielinskiand H. F. Korth, Eds., chapter 5, Kluwer Academic Publishers, Dodrecht, The Netherlands, 1996. [4] C. E. Perkins and...

Ngày tải lên: 21/06/2014, 17:20

... of Link layer protocols ã The lower layers in detail ã Summary 15 Classification of MAC protocols 16 Wireless Ad Hoc & Sensor Networks Wireless Ad Hoc & Sensor Networks Medium ... about routing protocols for ad hoc networks 52 Link management ã Goal Decide to which neighbours a link should be established ã Problem: Link quality is not binary (good vs. bad), i.e. link quality ... coordination 51 Summary ã The Ad Hoc wireless networks MAC protocols have been classified into different categories ã Some protocols were discussed as examples ã In the MAC layer of the sensor networks...

Ngày tải lên: 09/07/2014, 08:13

... is proposed and applied to existing localization algorithms. In the paper “A new time-based algorithm for positioning mobile terminals in wireless networks by I. Martin-Escalona and F. Barcelo-Arroyo, ... nodes is investigated. The last two papers address the problem of localizing and tracking objects using a WSN. In particular, the paper “Localization capability of cooperative anti-intruder radar systems” ... are running. This study addresses the accuracy of the TOAD algorithm in two different environments: line-of-sight (LOS) and non-line-of-sight (NLOS). This technique improves the scalability and integrity...

Ngày tải lên: 22/06/2014, 01:20

... surrounding, information on shops/restaurants in the area, and so on. 1.1.2 Wireless sensor networks Wireless sensor networks (WSNs for short) are a particular type of ad hoc network, in which ... Control in Wireless Ad Hoc and Sensor Networks P. Santi  2005 John Wiley & Sons, Ltd Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com 10 AD HOC AND SENSOR NETWORKS Currently, ... can quickly reach Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com 20 MODELING AD HOC NETWORKS the features of typical nodes in ad hoc and sensor networks are quite different,...

Ngày tải lên: 27/06/2014, 00:20

... xxvii I Introduction 1 1 Ad Hoc and Sensor Networks 3 1.1 TheFutureofWirelessCommunication 3 1.1.1 Adhocnetworks 3 1.1.2 Wirelesssensornetworks 5 1.2 Challenges 7 1.2.1 Adhocnetworks 8 1.2.2 Wirelesssensornetworks ... on topology control in wireless ad hoc and sensor networks, a topic that has been a subject of intensive research in recent years. Indeed, this research field is far from being settled, and several ... on fault-tolerant comput- ing in multiprocessor systems. Starting from 2001, his research interests shifted to wireless ad hoc networking, with particular focus on the investigation of fundamental...

Ngày tải lên: 14/08/2014, 14:20

... Control in Wireless Ad Hoc and Sensor Networks P. Santi  2005 John Wiley & Sons, Ltd AD HOC AND SENSOR NETWORKS 7 Table 1.1 Comparison of typical features of wireless ad hoc and sensor networks Ad ... Figure 2.1). 2 Modeling Ad Hoc Networks In this chapter, we introduce a simple but widely accepted model of ad hoc network. Since sensor networks are a subclass of ad hoc networks, this model ... of ad hoc networks. In fact, sensor networks are 18 MODELING AD HOC NETWORKS RA(u) at time t. In this case, v is said to be a 1-hop neighbor, or neighbor for short, of node u. A wireless link...

Ngày tải lên: 14/08/2014, 14:20

... regulating the access to the wireless, shared channel. Medium access control is of fundamental importance in ad hoc/ sensor networks in order to reduce conflicts as much as possible, thus maintaining ... strong: in fact, in many situations, node locations cannot be determined a priori (for instance, when sensors are dispersed on the field using a moving vehicle), and obtaining exact location information when ... application in mobile ad hoc networks. 3.4 Topology Control in the Protocol Stack A final question is left: where should topology control mechanisms be placed in the ad hoc network protocol stack? Since...

Ngày tải lên: 14/08/2014, 14:20

... that shadowing/fading effects are not considered, transmitting range, and transmit power level are equivalent concepts. Since traditionally the function RA is defined in terms of range, instead of ... shortest path destination tree, the corresponding spanning tree T  is obtained by changing the directed edges in the shortest path tree to the corresponding undirected edges in G. Since each of the ... u and v can be routed along at least k different paths, instead of along at least one single Topology Control in Wireless Ad Hoc and Sensor Networks P. Santi  2005 John Wiley & Sons, Ltd THE...

Ngày tải lên: 14/08/2014, 14:20

... avoiding this inconvenience: (i) enforcing all unidirectional links in G LMST to become bidirectional; or (ii) deleting all the unidirectional links in G LMST . If technique (i) is used, the obtained graph ... are reported in Table 12.2, are inter- esting: contrary to the case of CNN, wCNN shows a converging behavior as n increases; in particular, wCNN converges to 6 as n →∞. It is interesting to compare ... determine which one of them is closer. This can be accomplished by comparing the transmit powers included in the incoming messages received from v and w (we recall that this information is included...

Ngày tải lên: 14/08/2014, 14:20

... that in LMST the constructed topology, which in general can contain unidirectional links, is made symmetric by probing each node in N LMST (u), and by removing the link (or adding the reverse link) ... previous example, humans carrying a wireless device can be seen as network nodes). In some cases, node mobility is present in wireless sensor networks also: for instance, if sensors are deployed on ... reverse edge in the unidirectional links (or by removing all the unidirectional links), in XTC it is the neighbor relation itself that is symmetric, so adding or removing unidirectional links is not...

Ngày tải lên: 14/08/2014, 14:20

Ngày tải lên: 14/08/2014, 14:20

Ngày tải lên: 14/08/2014, 14:20

Ngày tải lên: 14/08/2014, 14:20

... proposals for improving the performance of TCP on wireless ad hoc networks, those readers who are interested in single-hop wireless networks are referred to [17]. The readers inter- ested in the surveys ... Fundamentally, wireless networks can be divided into two types: infra- structure, and ad hoc networks (also called infrastruc- ture less networks) . Examples of infrastructure and wireless ad hoc networks ... Maltz, Dynamic source routing in ad hoc wireless networks. Mobile Comput, 153–181 (1996) 25. D Kim, Y Choi, TCP-BuS: improving TCP performance in wireless ad hoc networks, in Communications, 2000....

Ngày tải lên: 21/06/2014, 00:20

... reproduction in any medium, provided the original work is properly cited. 1. INTRODUCTION There is an increasing interest in wireless ad hoc networks in many application domains where instant infrastructure ... Cheng, J. Sun, M. Min, and D Z. Du, “Energy-efficient broadcast and multicast routing in ad hoc wireless networks, ” in Proceedings of the 22nd IEEE International Performance, Computing and Communications ... dark arrows indicate links that are included into thetreeinsearch phases and the lig h t arrows indicate the links that are included into the tree in grow phases.) Finally, it remains to show...

Ngày tải lên: 22/06/2014, 22:20

Ngày tải lên: 14/08/2014, 14:20

Ngày tải lên: 14/08/2014, 14:20

Ngày tải lên: 14/08/2014, 14:20

Ngày tải lên: 14/08/2014, 14:20

Ngày tải lên: 14/08/2014, 14:20