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Cooperation in Wireless Communication Networks
Cooperation in Wireless Communication Networks

... 1) Single versus Multiple Entities A cooperative MAC protocol design should first deal with whether a single or multiple entities will be selected for cooperation. In a case of single entity cooperation, only the best cooperating entity is selected [15] - [17] such as in terms of effective transmiss ...
Chapter 2
Chapter 2

... Supporting packet compression and packet filtering before the packets are delivered through the air interface Providing IP functionality to the mobile network, which routes IP datagrams to the PDN with differentiated service support Interacting with AAA to provide IP authentication, authorization an ...
Optimizing Matrix Multiply
Optimizing Matrix Multiply

... • Bandwidth typically in Gigabytes (GB), i.e., 8* 220 bits • Effective bandwidth is usually lower than physical link bandwidth due to packet overhead. Routing and control ...
128509655X_397015
128509655X_397015

... Routing Strategies (cont'd.) • Open shortest path first (OSPF) – Network state determined first – Transmission path selected – Update messages sent when changes in routing environment occur • Reduces number of messages in internetwork • Reduces message size: not sending entire table ...
IP: Adressing, ARP, and Routing
IP: Adressing, ARP, and Routing

... When all machines receive the ARP request broadcast, they can store the address mapping in their cache. Do they? ARP is used when an IP to physical address mapping changes to notify hosts on the network of the change ARP messages are encapsulated in MAC frames. A special value in the type field of t ...
NEONET Netherlands Earth Observation Network
NEONET Netherlands Earth Observation Network

... – New or changed XML files get broadcasted to all nodes – Nodes retrieves files and records from local cache – No multicast for servlet results, only for database synchronisation CXXX-12A ...
O4102103111
O4102103111

... repeatedly during data gathering. However, such solutions with a single path for the mobile element may still lead today’s in WSNs, especially for the cases where the mobile element needs to collect data directly from every sensor node but it cannot visit the www.ijera.com ...
Document
Document

... There can be only one route with length w that traverses e along the given direction at its ith hop If two random routes ever share an edge in the same direction, then one of them must start in the middle of the other Cycles can exist, but with low probability » Prob. (diameter k cycle) = 1/d(k-2) ...
Using PlanetLab for Network Research: Myths, Realities, and Best Practices
Using PlanetLab for Network Research: Myths, Realities, and Best Practices

... provide a perfectly-customized environment for every experiment, it has been changing over time, and the base of knowledge of how to best utilize it has also been growing. As a result, many of the early observations researchers made about PlanetLab would change if rechecked today. In this paper, we ...
Part I: Introduction
Part I: Introduction

...  accomplished via “link state broadcast”  all nodes have same info  computes least cost paths from one node (“source”) to all other nodes  gives routing table for that node  iterative: after k iterations, know least cost path to k dest.’s ...
Node Classification in Uncertain Graphs
Node Classification in Uncertain Graphs

... accuracy by varying the ratio of noisy edges (φ) for the algorithms uBayes, uBayes+, wvRN, wvRN-20 and Sampling. The results for the DBLP data set are reported in Figure 2. The Sampling algorithm is the worst performer on both data sets, followed by wvRN and wvRN-20. The uBayes and uBayes+ algorithm ...
A Network Application Programming Interface for Data
A Network Application Programming Interface for Data

... vicinity, while the second allows a node to intervene and modify passing message. Support for these two modes is qualified as follows: Support an eavesdropping receive mode. A node is allowed to passively listen to all overheard messages for which the node is not the ultimate destination. This inclu ...
ORALS--finals--oct31/Nov3--2007
ORALS--finals--oct31/Nov3--2007

... Link state protocol Measurements of distance to candidate neighbors Wirings according to chosen strategy Re-wirings every T second A newcomer bootstraps by connecting to arbitrary neighbors ...
Mobile IP - OoCities
Mobile IP - OoCities

...  Strict separation between layer 2 and layer 3 results in increased network latencies  Mobile node may only communicate with a directly connected FA  MN may only begin registration process after layer 2 handoff to a new FA is completed  The registration process takes some time to complete. Durin ...
net-transport
net-transport

... Routing Algorithm classification 2 main classes: Centralized  all routers have complete topology, link cost info  “link state” algorithms Distributed:  Each router knows link costs to neighbor routers only  “distance vector” algorithms ...
ANALYSIS OF LIGHTWEIGHT SYBIL ATTACK DETECTION
ANALYSIS OF LIGHTWEIGHT SYBIL ATTACK DETECTION

... A set of mobile nodes which can communicate directly with other nodes within its transmission range and use multihop routing for nodes outside its transmission range is called Mobile Ad hoc Network (MANET). The infrastructure less nature (bandwidth, memory and battery power) of MANET makes it suscep ...
TCP/IP Internetworking (Part 2)
TCP/IP Internetworking (Part 2)

...  In this case network 192.168.x.x and network 60.x.x.x).  An “x” indicates anything Corporate network 192.168.x.x ...
Experiment
Experiment

... Step 2: Secure default source routes are setup to MA Step 4: New neighbors authenticate to MA via secure zone Step 5: Secure default source-routes setup between MA and new neighbors ...
WSDLite: A Lightweight Alternative to Windows Sockets Direct Path
WSDLite: A Lightweight Alternative to Windows Sockets Direct Path

... environment; reliable transport service implemented directly in hardware; no kernel intervention to send and receive messages; and little or no copying on either the sending or receiving side. SANs may be used for enterprise applications such as databases, web servers, reservation systems, and small ...
The Pulse Protocol - Department of Computer Science
The Pulse Protocol - Department of Computer Science

... seconds After 5 seconds 25% of min-hop paths have failed On-Demand routes may only work for a short period of time Link State Protocols need to flood every time a link changes These simulations only consider changes from connected  not connected (in free space) What about changes in link speed? Rel ...
Pastry: Scalable, distributed object location and routing for large
Pastry: Scalable, distributed object location and routing for large

... as one of the k nodes is live and reachable (in the Internet) from a client. Furthermore, Pastry ensures, with high probability, that a lookup message is routed to one of the k nodes that is near the client. This provides for load balancing, reduced network load and low client response time. In the ...
ML-SOR: Message routing using multi
ML-SOR: Message routing using multi

... and show that the structure of the social graph constructed on self-declared friends helps to build forwarding paths in the contact graph, allowing two nodes to communicate over time using opportunistic contacts and intermediate nodes. In MobiClique [14], Pietiläinen et al. leverage DSN and OSN so t ...
Path Splicing - UCLA Computer Science
Path Splicing - UCLA Computer Science

Chapter 1
Chapter 1

... • A routing loop is a condition in which a packet is continuously transmitted within a series of routers without ever reaching its intended destination network. • The loop can be a result of: • Incorrectly configured static routes. • Inconsistent routing tables not being updated because of slow conv ...
Presentation
Presentation

... focuses attack on these nodes, shutting them down  What is Pstatic(N,M,S,B,A) = P(attack prevents communication with target)  P(n,b,c) = P(set of b nodes chosen at random (uniform w/o replacement) from n nodes contains a specific set of c nodes)  P(n,b,c) = ...
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Routing in delay-tolerant networking

Routing in delay-tolerant networking concerns itself with theability to transport, or route, data from a source to adestination, which is a fundamental ability all communication networks musthave. Delay- and disruption-tolerant networks(DTNs) are characterized by their lack of connectivity, resulting in a lack of instantaneous end-to-end paths. In these challenging environments, popular ad hoc routing protocols such as AODV and DSR fail to establish routes. This is due to these protocols trying to first establish a complete route and then, after the route has been established, forward the actual data. However, when instantaneous end-to-end paths are difficult or impossible to establish, routing protocols must take to a ""store and forward"" approach, where data isincrementally moved and stored throughout the network in hopes that it will eventually reach its destination. A common technique used tomaximize the probability of a message being successfully transferred is toreplicate many copies of the message in hopes that one will succeed inreaching its destination.
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