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Chapter 12 Routing
Chapter 12 Routing

... —Very robust ...
Copper Media - WordPress.com
Copper Media - WordPress.com

... sent on a mesh network can take any of several possible paths from source3 to destination. (Recall that even in a ring, although two cable paths exist, massages can only travel in one direction.) Some WANs. most notable the Internet, employ mesh routing. A mesh network in which every device connects ...
From biological to social networks: Link prediction based on multi
From biological to social networks: Link prediction based on multi

... influence between them. Interactions between proteins are important for numerous – if not all – biological functions. Given a natural example from the area of biology, signals from the exterior of a cell are mediated to the inside of that cell by protein–protein interactions of the signaling molecul ...
Presentation ( format)
Presentation ( format)

... • CTS “freezes” stations within range of receiver (but possibly hidden from transmitter); this prevents collisions by hidden station during data transfer • RTS and CTS are very short: collisions are thus very unlikely • Note: IEEE 802.11 allows both CSMA, CSMA+RTS/CTS ...
Notes
Notes

...  each nodes has detailed area topology; only know direction (shortest path) to nets in other areas.  area border routers: “summarize” distances to nets in own area, advertise to other Area Border routers.  backbone routers: run OSPF routing limited to ...
DESIGN AND IMPLEMENTATION  OF A WIRELESS  ZIGBEE MESH NETWORK
DESIGN AND IMPLEMENTATION OF A WIRELESS ZIGBEE MESH NETWORK

the sending adapter inserts the destination adapter`s MAC address
the sending adapter inserts the destination adapter`s MAC address

... nodes have frames to transmit, the effective transmission rate of the channel can be much less. We define the efficiency of CSMA/CD to be the fraction of time during which frames are being transmitted on the channel without collisions when there is a large number of active nodes, with each node havi ...
Chord: A Scalable Peer-to-peer Lookup Service for Internet
Chord: A Scalable Peer-to-peer Lookup Service for Internet

... hashing paper uses “ -universal hash functions” to provide certain guarantees even in the case of nonrandom keys. Rather than using a -universal hash function, we chose to use the standard SHA-1 function as our base hash function. This makes our protocol deterministic, so that the claims of “high pr ...
Cross-layer Enhanced Source Location Privacy in Sensor Networks
Cross-layer Enhanced Source Location Privacy in Sensor Networks

Frame Relay
Frame Relay

Effective Key Management in Dynamic Wireless
Effective Key Management in Dynamic Wireless

... Such type of encryption is well-suited for sensor nodes because of their limited energy and processing capability.  Asymmetric key based approaches have been proposed for dynamic WSNs. These approaches take advantage of public key cryptography (PKC) such as elliptic curve cryptography (ECC) or iden ...
Notes
Notes

An Improved Kademlia Protocol In a VoIP System
An Improved Kademlia Protocol In a VoIP System

... more backup channels.Those peers will return γ closest peers it knows from their own backup channels. βand γis a system-wide parameter. Returning peers would update the current backup channels. In this rate, local peer would get more information to set up a robust backup channel. ...
Vivaldi: A Decentralized Network Coordinate System
Vivaldi: A Decentralized Network Coordinate System

... An additional challenge is handling nodes that have a high error ...
Balancing Systematic and Flexible Exploration of Social Networks
Balancing Systematic and Flexible Exploration of Social Networks

... based on its value. This helps illustrate each node’s position among all ranked entities. The network visualization also paints each node with this color. Figure 1 illustrates SocialAction’s technique on a subgraph from the global terrorism network. This network is two-mode, which mean it has two di ...
98-366 Slides Lesson 2
98-366 Slides Lesson 2

... • This layer establishes, maintains, and decides how transfer is accomplished over the physical layer. • Devices that exist on the DLL are network interface cards and bridges. • This layer also ensures error-free transmission over the physical layer under LAN transmissions. • It does so through phys ...
A Zero Burst Loss Architecture for star OBS Networks.
A Zero Burst Loss Architecture for star OBS Networks.

... The main characteristic of an OBS network is the separation between data and control planes. Payload data is received and assembled into data bursts at each source edge node in the electronic domain, transported through one or more optical core nodes in the optical domain, and delivered to sink edge ...
SDN and Virtualization
SDN and Virtualization

...  Network virtualization: not clear what it is  a network virtualization layer allows for the creation of virtual networks, each with independent service models, topologies, and addressing architectures, over the same physical network. Tenants can configure its virtual network  Existing mechanisms ...
Pathport C Spec - Pathway Connectivity
Pathport C Spec - Pathway Connectivity

... 1.2 Each node shall incorporate two 5-pin XLR type connectors. Output ports shall utilize female connectors and input ports shall utilize male connectors. 1.3 Each node shall also incorporate one RJ-45 type female jack for the Ethernet port. 1.4 Nodes shall incorporate a backlit graphical LCD displa ...
Overview of the Blue Gene/L system architecture
Overview of the Blue Gene/L system architecture

Tapestry: A Resilient Global-Scale Overlay for Service
Tapestry: A Resilient Global-Scale Overlay for Service

... More than one node may be hosted by one physical host. Application-specific endpoints are assigned globally unique identifiers (GUIDs), selected from the same identifier space. Tapestry currently uses an identifier space of 160-bit values with a globally defined radix (e.g., hexadecimal, yielding 40 ...
Event Detection
Event Detection

... sensor nodes and transmits the resulted data to the control center, which contains partial information of the original observed data. • For the distributed option and the quantized option, the global optimal detection schemes can always be obtained by exhaustive search, although it is not practical ...
paper
paper

... resource allocation is how to assign the available resources assigned some transmission attempt probability. We assume to different users. For resource provision one can consider a that in every time slot nodes decide to transmit with these scheduled approach which effectively eliminates interferenc ...
Intro aux res info
Intro aux res info

... CSMA avoids some collisions, but not all Some collisions can be avoided, but not completely. This is because of propagation delays. If two or more stations may sense that the medium (= the channel) is free and start transmitting at time instants that are close enough for a collision to occur. Assum ...
Ethernet Data Link Layer Standards
Ethernet Data Link Layer Standards

... e) If you know that a system has 64 states, how many bits can it send per clock cycle? f) If you know that a system has 256 states, how many bits can it send per clock cycle? g) In general, to transmit twice as many bits per clock cycle, how much must you increase the number of alternatives? (The an ...
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CAN bus

A controller area network (CAN bus) is a vehicle bus standard designed to allow microcontrollers and devices to communicate with each other in applications without a host computer. It is a message-based protocol, designed originally for multiplex electrical wiring within automobiles, but is also used in many other contexts.Development of the CAN bus started in 1983 at Robert Bosch GmbH. The protocol was officially released in 1986 at the Society of Automotive Engineers (SAE) congress in Detroit, Michigan. The first CAN controller chips, produced by Intel and Philips, came on the market in 1987. The 1988 BMW 8 Series was the first production vehicle to feature a CAN-based multiplex wiring system.Bosch published several versions of the CAN specification and the latest is CAN 2.0 published in 1991. This specification has two parts; part A is for the standard format with an 11-bit identifier, and part B is for the extended format with a 29-bit identifier. A CAN device that uses 11-bit identifiers is commonly called CAN 2.0A and a CAN device that uses 29-bit identifiers is commonly called CAN 2.0B. These standards are freely available from Bosch along with other specifications and white papers.In 1993 the International Organization for Standardization released the CAN standard ISO 11898 which was later restructured into two parts; ISO 11898-1 which covers the data link layer, and ISO 11898-2 which covers the CAN physical layer for high-speed CAN. ISO 11898-3 was released later and covers the CAN physical layer for low-speed, fault-tolerant CAN. The physical layer standards ISO 11898-2 and ISO 11898-3 are not part of the Bosch CAN 2.0 specification. These standards may be purchased from the International Organization for Standardization (ISO).CAN in Automation (CiA) also published CAN standards; CAN Specification 2.0 part A and part B, but their status is now obsolete (superseded by ISO 11898-1).Bosch is still active in extending the CAN standards. In 2012 Bosch released CAN FD 1.0 or CAN with Flexible Data-Rate. This specification uses a different frame format that allows a different data length as well as optionally switching to a faster bit rate after the arbitration is decided. CAN FD is compatible with existing CAN 2.0 networks so new CAN FD devices can coexist on the same network with existing CAN devices.CAN bus is one of five protocols used in the on-board diagnostics (OBD)-II vehicle diagnostics standard. The OBD-II standard has been mandatory for all cars and light trucks sold in the United States since 1996, and the EOBD standard has been mandatory for all petrol vehicles sold in the European Union since 2001 and all diesel vehicles since 2004.
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