Arrange nodes in ns2

问题:

I need to arrange 100 nodes in a hexagonal shape in my tcl script. My simulation is wireless (dsr protocol). How can I do this? Which is the best size of the grid? I thought 3000x3000.

Thank you.

回答1:

The simplest way is to build the network graphically .. you can use nsg tool to build the network and generate the tcl code very easily

http://www.nsnam.com/2013/04/ns2-scenario-generator.html

first you must determine the transition range of nodes, put required number of node-> get network size , or you can compute it mathematically using transmition range and hexagon aria

https://en.wikipedia.org/wiki/Hexagon

If you plan to use nsg to draw a regular hexagon use this simple trick:

• if the transmition range is equal to 300 m then make it 250 m
• put first node in the center of the network.
• put two nodes in the border of first node coverage aria.
• put other nodes in the 4 Intersection of coverage area o previous 3 nodes.
• repeat previous steps for other hexagons.
• return the transmition range to its correct value (300 m).