ad hoc and meet me conferencing

... technique and methodology for digital investigation in wireless ad hoc and sensor networks was provided in this work We considered an ad hoc network, which is composed of two types of nodes, namely ... node movement, topology variation, roaming and IP handoff, and cluster creation, splitting and merging Especially, in wireless sensor networks, observer nodes should be equipped with additional ... increasing use of wireless communication and network community interest in mobile computing, industry, and academia have granted a special attention to Mobile Ad hoc and Sensor Networks (MASNets) The...

Ngày tải lên: 21/06/2014, 02:20

... try $110$ as candidate address and $000$ as mask and will fail The second recursive call will try $111$ as candidate address and $000$ as mask and will succeed Similarly, in round and Figure 4, ... authentication and introduced new key establishment methods Our proposal overcomes some of the main issues (such as rapid deployment, accuracy, and dynamic and robust behaviour) of existing solutions and ... unique nature and characteristics of mobile ad hoc Networks and wireless mesh networks make them ideal networking solution to the above situations At the same time, their nature and characteristics...

Ngày tải lên: 21/06/2014, 11:20

... Martin-Escalona and F Barcelo-Arroyo, a hybrid localization technique is proposed The positioning algorithm, named time of arrival to time difference of arrival (TOAD), computes TDOA measurements from the messages ... extensive measurement campaign is described and the measured data are used to derive statistical ranging models based on TOA estimation in the presence of LOS and NLOS propagation conditions In addition, ... localization in harsh environments and it is specifically addressed in the following two papers The first paper “Two-step time of arrival estimation for pulse-based ultra-wideband systems” by S Gezici...

Ngày tải lên: 22/06/2014, 01:20

... http://www.simpopdf.com AD HOC AND SENSOR NETWORKS related to ad hoc/ sensor networking are still unsolved In this section, we describe the state of progress of the current ad hoc and sensor network technology, and ... wireless ad hoc and sensor networking, and has been involved in the organizational and technical committee of several conferences in the field Dr Santi is a member of ACM and SIGMOBILE Simpo PDF Merge ... Unregistered Version - http://www.simpopdf.com AD HOC AND SENSOR NETWORKS Table 1.1 Comparison of typical features of wireless ad hoc and sensor networks Ad hoc Networks Heterogeneous devices Mobile...

Ngày tải lên: 27/06/2014, 00:20

... field of wireless ad hoc and sensor networking, and has been involved in the organizational and technical committee of several conferences in the field Dr Santi is a member of ACM and SIGMOBILE ... can be used both in ad hoc and in sensor networks, some of them are more useful for application in sensor networks (Chapters 4, 6, 7, 8, 10), and others for application in ad hoc networks (Chapters ... 196 196 199 VI Case Study and Appendices 16 Case Study: TC and Cooperative Routing in Ad Hoc Networks 16.1 Cooperation in Ad Hoc Networks 16.2 Reference Application...

Ngày tải lên: 14/08/2014, 14:20

... to ad hoc/ sensor networking are still unsolved In this section, we describe the state of progress of the current ad hoc and sensor network technology, and the main challenges that face the ad hoc/ sensor ... thousands of nodes This means that protocols for ad hoc networking must be able to operate efficiently in the presence of a very large number of nodes also AD HOC AND SENSOR NETWORKS In case of ad ... deployed in harsh environments, and sometimes they operate under extreme weather conditions In these situations, the quality of the radio communication might be extremely poor, and performing the requested...

Ngày tải lên: 14/08/2014, 14:20

... 2003) Assume n nodes, each with transmitting range r, are placed uniformly at random in [0, l], and assume that rn = kl log l, for some constant k > Further, assume that r = r(l) l and n = n(l) ... giant component phenomenon in sparse ad hoc networks Through simulations, it is observed in (Santi and Blough 2003) that the giant component phenomenon occurs in two- and three-dimensional networks, ... presented in (Booth et al 2003) and (Bettstetter 2004), which refer to two-dimensional ad hoc networks Consider a set of nodes located in the plane, and assume that nodes u and v are directly connected...

Ngày tải lên: 14/08/2014, 14:20

... the simulation of ad hoc and sensor networks are bounded and obstacle free; this is the case, for instance, of the random direction model, of Brownian-like mobility models, and of most group-based ... [0, 1]2 and obstacle free Furthermore, assume that FM is continuous on ∂R, and minR FM > The CTR for connectivity of an ad hoc network with M-like mobility is rM = c log n , πn for some constant ... active connectivity and active domination that it satisfies both active connectivity and active domination if and only if graph I (n, r, p) is connected – Randomized broadcast: Assume a certain network...

Ngày tải lên: 14/08/2014, 14:20

... broadcasts its ID at maximum power (as usual, we assume that all the nodes have the same maximum transmit power Pmax , and that the wireless medium is symmetric) Upon receiving broadcast messages ... the symmetric supergraph of Gk , and proved the following theorem: Theorem 12.1.7 (Xue and Kumar 2004) Assume that n nodes are placed uniformly at random in [0, 1]2 , and let G+ be the symmetric ... topology, Borbash and Jennings performed extensive simulation on random node deployments, measuring the above listed parameters for the following topologies: the MST, the RNG, and the minR graph,...

Ngày tải lên: 14/08/2014, 14:20

... node u must send two messages: one to broadcast its ID and a second message to broadcast its neighbor list (we recall that sending this message is necessary to identify symmetric neighbors) Since ... topology generated by LMST), node u must send four messages: one to broadcast its ID and position and three messages to probe the links with nodes o, v, and z The power level settings of node u are ... first comment is about what we mean by mobile network It is clear that different types of node mobility may occur in ad hoc networks, ranging from highly mobile networks (e.g vehicular ad hoc networks,...

Ngày tải lên: 14/08/2014, 14:20

... control message exchange between nodes in a neighborhood Two types of control messages are used: beacon and help messages The content of beacon and help messages is the same, that is, ID and current ... P0 and send a beacon message After sending this initial message and waiting for a stabilization time, node u checks whether it has at least k symmetric neighbors If so, it becomes inactive, and ... KNeighLevU (U stands for ‘unselfish’) Three additional types of control messages are used in KNeighLevU: enquiry, reply, and selective help messages Enquiry and reply messages contain the same information...

Ngày tải lên: 14/08/2014, 14:20

... assignment in ad hoc wireless networks Proc IEEE WCNC 03, New Orleans, LA, pp 1889– 1894 Anderegg L and Eidenbenz S 2003 Ad hoc- vcg: a truthful and cost-efficient routing protocol for mobile ad hoc ... Failure-resilient ad hoc and sensor networks in a shadow fading environment Proc IEEE Workshop on Dependability Issues in Ad Hoc Networks and Sensor Networks (DIWANS), Florence Topology Control in Wireless Ad ... Conference on Security, Communications and Multimedia, Washington, DC Moaveni-Nejad K and Li X 2005 Low-interference topology control for wireless ad hoc networks Ad Hoc and Sensor Networks: an International...

Ngày tải lên: 14/08/2014, 14:20

... management of the whole system and coordination of the planes and layer management for management of functions relating to the operation of the various protocol entities Wireless ATM and Ad Hoc ... establishment However, when terminals become mobile, this is no longer true and additional addressing schemes and protocols are needed to track the mobile ATM terminal Location management in a ... ROUTE_REPLY message and consequently made available at the source node DSR supports both symmetric and asymmetric links Thus, the ROUTE_REPLY message can be either carried over the same path with...

Ngày tải lên: 29/09/2013, 21:20

... mgÆmL)1, and an RT-PCR instrument The whole experiment takes < h and allows evaluation of 1–384 samples at the same time (depending on the set-up of the PCR instrument) In a typical experiment, ... Louis, MO, USA) The experimental setup, gradients and methods were identical in the ThermoFAD and ThermofluorÒ analyses Detection was performed using the SYPRO Orange and SYBR Green fluorescence ... 3A) Moreover, the ThermoFAD analysis allowed us to identify NADP analogues with higher affinity to FMO compared to NADP:3-acetylpiridine ADP, thioNADP and nicotinic acid ADP These compounds were...

Ngày tải lên: 23/03/2014, 04:21

... agents and medical emergency personnel Recently an important new concept has emerged which may help extend ad hoc networking to commercial applications, namely, the concept of oppor- Ad Hoc Network ... “extreme” conditions, namely, extreme mobility (radio and networking), strict delay attributes for safety applications (networking and radio), flexible resource management and reliability (adaptive ... of radio platforms that include narrowband, broadband, and software defined radios, a set of small to medium physical MANET testbeds incorporating novel radio devices, a collection of measurements...

Ngày tải lên: 01/06/2014, 00:31

... address field is employed in Zigbee for packet transmission If the IPv6 standard, with 128-bit addresses, is used, the effective payload is even less unless some header compression method is adopted ... argument that node ID schemes have a great impact on system efficiency and that the traditional global ID scheme is not suitable Instead of employing the static global ID scheme, a local ID scheme ... localization and location tracking, power management and energy-efficient design, power and topology control, time synchronization, coverage issues, middleware and software design, data gathering and processing,...

Ngày tải lên: 01/06/2014, 11:10

... based key management model for ad hoc networks the Third Annual Mediterranean Ad Hoc Networking Workshop (2004) DY Lee, HC Jeong, An efficient certificate management for mobile ad- hoc network, in ... integrity and authenticity of the HELLO and TC messages Another OLSR-based scheme is proposed by Xia et al [12] They use identity-based encryption and alter the OLSR’s HELLO and TC messages for ... fundamental parameters of the DCA, such as the total number of DCA members, threshold value, and list of DCA members, will be negotiated and agreed among a certain number of nodes With these parameters,...

Ngày tải lên: 20/06/2014, 22:20

... head, the current cluster head will hand the responsibility to the backup cluster head by setting its field CHID = CHBK Otherwise, if some members become out of range of both the cluster head and ... direction of the road as one-dimensional VANET We assume that all status messages have the same length L bits, all vehicles have the same transmission range R meters and use the same transmission ... cluster j’s members managed to send their status messages at time instance t The system’s delay is measured by allowing one vehicle to send an emergency message and measure the time it reaches...

Ngày tải lên: 20/06/2014, 22:20

... of group members from that of the leader − → − → − → − → V member = V leader + rand(·) ∗ SDR ∗ maxs , (1) Θ member = Θ leader + rand(·) ∗ ADR ∗ maxa , Figure 4: Example of node movement in the ... C E Perkins and E M Royer, “The ad hoc on-demand distance vector protocol,” in Ad Hoc Networking, pp 173–219, Addison-Wesley, Reading, Mass, USA, 2001 [2] D B Johnson, D A Maltz, and J Broch, ... multi-hop wireless ad hoc networks,” in Ad Hoc Networking, pp 139–172, AddisonWesley, Reading, Mass, USA, 2001 [3] T Camp, J Boleng, and V Davies, “A survey of mobility models for ad hoc network research,”...

Ngày tải lên: 21/06/2014, 11:20

... same time The basic idea is to sign messages with ephemeral, anonymous, and traceable identities for network security We adopted proxy signature cryptography to authenticate vehicles and RSUs and ... from Message Replay Attack Timestamps TSV and TSR are embedded for mutual authentication in messages exchanged in V2I communication If the time information included in the timestamp of the message ... the first two messages are left empty in Table This is because these two messages are formed without involving PM and PR operations Although ECPP and LPPAS comprise four and six messages, respectively,...

Ngày tải lên: 21/06/2014, 11:20