[ns] Analyzing wired-cum-wireless simulations

[Carlo Santos]

Hi,

I am trying to analyze results of simulation with a wired and wireless
topology (based here: http://www.isi.edu/nsnam/ns/tutorial/nsscript6.html)
. However, the different scripts I have found do not seem to be able to
give me the jitter, delay, and losses. I have attached my trace file to the
mail for your reference.

The sample scripts I have found are from the following:


   - http://hpds.ee.ncku.edu.tw/~smallko/ns2/tool_en.htm
   - http://nile.wpi.edu/NS/analysis.html


-- 
Carlo Santos

[ns] Error in IEEE 802.11 implementation

[Abinaya Ulagapa]

Hello everyone,

In my implementation of an ad hoc network where 10 nodes communicate with a
central hub, I get the following error and implementation does not
terminate.
*

MAC_802_11: accessing MAC cache_ array out of range (src 10, dst 0, size
10)!*
*MAC_802_11: accessing MAC cache_ array out of range (src 10, dst 1, size
10)!*
*MAC_802_11: accessing MAC cache_ array out of range (src 10, dst 2, size
10)!*
*MAC_802_11: accessing MAC cache_ array out of range (src 10, dst 3, size
10)!*
*MAC_802_11: accessing MAC cache_ array out of range (src 10, dst 4, size
10)!*
*MAC_802_11: accessing MAC cache_ array out of range (src 10, dst 5, size
10)!*
*MAC_802_11: accessing MAC cache_ array out of range (src 10, dst 6, size
10)!*
*MAC_802_11: accessing MAC cache_ array out of range (src 10, dst 7, size
10)!*
*MAC_802_11: accessing MAC cache_ array out of range (src 10, dst 8, size
10)!*
*MAC_802_11: accessing MAC cache_ array out of range (src 10, dst 8, size
10)!*
*[suppressing additional MAC cache_ warnings]*

What does this mean? And how can I rectify it?

Thank you.

Regards,
Abinaya Ulagappa

[ns] [Help] Implementing a Steiner Tree for a multicast routing protocol

[Manaswi Saha]

Hello everyone,

I am trying to develop a multicast routing protocol for wireless mesh
networks.

I am using a Steiner tree algorithm for constructing the multicast tree.

I am not sure how to implement this routing tree algorithm in ns2 and store
the same in the routing tables.

I have gone through AODV code. It makes use of route requests and reply
packets for doing the same and stores the precursor nodes in the packets..
and then updates the table.

In my problem, I trying to implement a shared multicast tree. How do I
achieve that?

Can anyone guide me through the process.

Thank you.

Regards,
Manaswi Saha