Controlled Routing of Opportunity Network routing Learning

This article refers to the article: Delay tolerant Mobile Networks (dtmns) _ Controlled flooding schemes in Sparse Mobile Networks

In this paper, the core part is to propose the concept of node will. expresses the degree to which nodes are willing to participate in network information transmission. This will be determined by the Beacon Interval (Beacon interval), retransimitted wait time (retransmission wait), time-to-send (transmit time) 3 parameters. The different values of the 3 parameters are set to determine the desired performance of the nodes. (note: Instead of consolidating the 3 parameters, it shows different intentions through 3 parameters respectively.) ）

In order to illustrate how the node will work, a simple example is given: assuming that the node's beacon interval is 1s, retransmission wait time is 50s, sending time is 2s. (It is assumed that all nodes have the same intention, that is, the values of the 3 parameters are equal.) ）。 So when a sender wants to send a message, it sends a beacon every 1s to find the node that can receive the message. When it finds an intermediate node (and sends an ACK response message to it after receiving the beacon), it passes the message to the intermediate node and then the sending time minus 1. Then wait for 50s, once again every 1s send beacon, to find the next middle node. Loop until the send time is reduced to 0. And the intermediate node sends the message as if it were the sender. (Note: This assumes that all nodes will be the same.) So all nodes send messages in the same mode. ）

After that, the article adds the concept of ttl,kill time and pasive cure respectively. Reduce the overhead of flooding by setting the TTL. Kill time is a message that is deleted when the message is over the time stamp during the transmission. The basic idea of Passive cure is that when the forwarding node and the destination node receive the message, a cure_ack message is fed back. To avoid retransmission problems, but this method brings the overhead of cure_ack message transmission.

This is the general content.