‹date/time›
Click to edit Master text styles
Second level
Third level
Fourth level
Fifth level
‹#›
For example, The accuracy of the topology is mainly determined by nodes mobility and the “freshness” of the message. On the other hand, the message exchanging consumes the network resource, so the balance should be made between the frequency of message exchange and the accuracy of topology which mobile nodes can achieve.
2
-The environment includes mobility, traffic, signal quality etc.
-We do not propose a new routing protocol, but a new technique applied to routing protocols
3
As the first step, we’ll look into the mobility
Mobility Models: Random Waypoint (RW), Manhattan Grid (MH) and Reference Point Group Mobility (RPGM)
Relative mobility: average relative speed between mobile nodes
Link duration: the average time that two nodes in the transmission range
5
-The mobility is defined as the relative speed between two nodes.
-The number of link breaks have nearly linear relationship with node mobility
-PDR decreases as mobility increases.
Fine doted line is for OLSR, fine dashed line is for AODV
-
6
Link duration is defined as the time period that two nodes are in the transmission range. Ling-lived link increases network stability.
7
The three graphs in the top show the number of link breaks for different mobility models with medium mobility (min 0m/s, max 10m/s)
To monitor the number of link breaks, it is simple for proactive routing protocols with routing table. For reactive routing protocol such as DSR, we still can obtain the parameter by using routing cache. This graph is the comparison.
8