What is directed diffusion protocol?

Directed diffusion [48] is a query-based protocol where a query is flooded in the network by the sink where multiple routes are established between the sink and source. The sink reinforces one of the paths and receives data in a shorter interval through this reinforced path.

What happens in direct diffusion?

Direct Diffusion (DD) is a routing protocol, which enables communication between sink and source nodes in random and mesh topology networks. This routing protocol is based on a data-centric approach, where intermediate nodes can aggregate data and send it to a sink node.

What do you understand by directed diffusion routing protocol and how it is different from spin?

There are two major differences between Directed Diffusion and SPIN. In Directed Diffusion, the sink queries the sensor nodes if a specific data is available by flooding some tasks. In SPIN, sensors advertise the availability of data allowing interested nodes to query that data.

What is Spin protocol?

SPIN stands for Sensor Protocol for Information via Negotiation. These protocols are designed to address the deficiency of flooding and gossiping. SPIN uses three types of messages, ADV, REQ and DATA. The ADV message is broadcasted by a node which has some data. This message is broadcasted by the node.

What is collection Tree Protocol?

From Wikipedia, the free encyclopedia. The Collection Tree Protocol (CTP) is a routing protocol for wireless sensor networks. It is used for transferring data from one or more sensors to one or more root nodes.

What is centralized routing?

What is centralized routing ? The centralized routing model is a routing model in which routing is performed centrally using a centralized database. In other words, the routing table is kept on a single “central” node, which must be consulted when other nodes have to make a routing decision.

What is the role of diffusion in respiration?

The body needs a way to get oxygen in and carbon dioxide out, which is through diffusion. When blood returns to your lungs from the body, it has a lot of carbon dioxide and little oxygen. So, by the rule of diffusion, the carbon dioxide moves from the blood to the alveoli, where it can be exhaled through the lungs.

How do you describe diffusion?

Diffusion is the movement of a substance from an area of high concentration to an area of lower concentration . Diffusion occurs in liquids and gases when their particles collide randomly and spread out. Diffusion is an important process for living things – it is how substances move in and out of cells.

Which protocol is used in WSN?

Most of the applications of WSN uses route discovery base routing protocols e.g. AODV, DSR & OLSR. The performance of these protocols is compared in different scenarios on the basis of throughput, delay and congestion.

What are the process steps of spin protocol?

The SPIN-PP protocol. Node A starts by advertising its data to node B (1). Node B responds by sending a request to node A (2). After receiving the requested data 3), node B then sends out advertisements to its neighbors (4), who in turn send requests back to B (5, 6).

What is Pegasis protocol?

PEGASIS (Power Efficient Gathering in Sensor Information Systems) is a chain-based routing protocol for WSNs [16]. In PEGASIS, each sensor node only needs to transmit data to its neighbour which is closer to the sink node.

Which is an example of a directed diffusion protocol?

Directed diffusion is a query-based protocol where a query is flooded in the network by the sink where multiple routes are established between the sink and source. The sink reinforces one of the paths and receives data in a shorter interval through this reinforced path.

How are interests propagated in a directed Diffusion Network?

Interests are propagated across the network, looking for nodes with matching event records. Key to directed diffusion is the assumption that interests are persistent—that is, if a source has information relevant to a sink, then the sink will be interested in repeated measurements from that source for some period of time.

What are sinks and sources in directed diffusion?

Directed diffusion [ 104] is a very general approach toward problems of this type. Nodes requesting information are called sinks, while those generating information are called sources. Records indicating a desire for certain types of information are called interests.

What are the pros and cons of directed diffusion?

Continued…. Pros Energy – Much less traffic than flooding. Latency – Transmits data along the best path Scalability – Local interactions only Robust – Retransmissions of interests Cons The set up phase of the gradients is expensive Need of and adequate MAC layer to support an efficient implementation.

https://www.youtube.com/watch?v=dwx5KXAc9Ns