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[ram]

I need to illustrate the status of nodes in a wireless/mesh network at different time periods.

The first drawing should show all the nodes as active. However, in my second drawing, i have to show one of the nodes as being failed or as being moved away from the network.

Can anybody help me how to represent a node as operationally failed/destructed in the network (so other nodes can no longer communicate through them).

Regards.

[Jonathan]

Here are a few suggestions:

a) put an X through dead nodes;

b) change the outside boundary of a dead node to a dashed line;

c) fill in the interior of a dead node to make it completely black;

[ram]

Thanks for your suggestion. Your first suggestion looks good to me, and i am going to use that.

Thanks again.

[JimIvey]

You could also put an "X" through a line representing a connection -- typically with arrows on both ends.  Or you can show the connection as broken -- a gap in the connecting line.  To show the node moving away, you could use a broad arrow pointing from a previous position to its current position to represent the movement along with the broken connection to illustrate cause and effect.

Regards.

[Jonathan]

A happy face and unhappy face with X's for eyes would work as well..  

[JimIvey]

A happy face and unhappy face with X's for eyes would work as well..  

Ah, good idea!

Connected node:  
Disconnected node:   or   or   or   or   or   or  
Connected node with high bandwidth:   or   or  
A node in the process of connecting:  

I'll have to give that some thought for my next application....

Regards.

[ram]

Vow. Smiley representation also looks great. Good creativity by Jim.

I hope I can use it in my next application, only if my manager doesn't fire me for that.

My Next question:-

How to represent collision in a 802.11 network

I am illustrating some 4-5 LAN's, each having an acess point, and each access point serving 2-3 terminals (e.g. Laptops) within a particular LAN. Now i need to show that a first node senses that the channel is free (CSMA protocol), and starts communicating while a second node (newly arrived node) starts communicating in the same channel without the knowledge of first node communicating in the same channel. This leads to collision.

I think its very easy to show it in a message flow diagram or timing diagram.  But, how do i illustrate this particular scenario of collision in a block diagram with pluarality of nodes, and access points.

Thanks,

Ram

P.S -   Dont tell me that i can use   or   or  :-/ or    to represent collision.