Monday, November 21, 2011

[ns] 802_11 plus 802_15_4 plus hierarchical routing

Hello,

I have been working on a script to have communication between Zigbee
nodes and Wifi nodes for Smart Grid applications.

I believe I have accomplished communication between these two node
types with some limitations.


Script includes:

3 domains
- 1 wired node
- 3 zigbee nodes includes 1 base station
- 3 wifi nodes includes 1 base station

node-configs
- DSDV
- TwoRayGround
- PriQueue
- et al

2 full-duplex links --> wifi bs --- wired --- zigbee bs

using CBR/UDP or FTP/TCP as application/agent


Here are the limitations I am encountering:

- wifi and zigbee bs node must be created before non-bs nodes

- wifi packets sent to zigbee nodes fail, but zigbee packets sent to
wifi nodes reach destination
-- failure seems to be because of addressing issue. the
initiating wifi node transmits the packet to the zigbee bs instead of
the wifi bs


Here is a sample trace packet from wifi node:

s -t 26.000000000 -Hs 4 -Hd -2 -Ni 4 -Nx 70.00 -Ny 12.00 -Nz 0.00 -Ne
-1.000000 -Nl AGT -Nw --- -Ma 0 -Md 0 -Ms 0 -Mt 0 -Is 4194306.0 -Id
8388610.0 -It tcp -Il 40 -If 2 -Ii 32 -Iv 32 -Pn tcp -Ps 0 -Pa 0 -Pf 0
-Po 0

-Hs 4 (Wifi node)
-Hd -2 (node 2 is the Zigbee bs, and I am not sure why a negative is appended)

-ls 4194306.0 (this is the corresponding IP address of the wifi node)
-ld 8388610.0 (this is the IP address of the zigbee destination node)


Here is a sample trace packet from zigbee node:

s -t 26.000000000 -Hs 6 -Hd -2 -Ni 6 -Nx 90.00 -Ny 8.00 -Nz 0.00 -Ne
-1.000000 -Nl AGT -Nw --- -Ma 0 -Md 0 -Ms 0 -Mt 0 -Is 8388610.0 -Id
4194306.0 -It tcp -Il 40 -If 2 -Ii 32 -Iv 32 -Pn tcp -Ps 0 -Pa 0 -Pf 0
-Po 0

-Hs 6 (Zigbee node)
-Hd -2 (node 2 is the Zigbee bs, and I am not sure why a negative is appended)

-ls 8388610.0 (this is the IP address of the zigbee BS)
-ld 4194306.0 (this is the corresponding IP address of the wifi node)


I have searched and searched for any script which considers or
attempts to consider communication between wifi and zigbee nodes, but
I have seen nothing. If anyone is interested, reply back or email me.

I am considering debugging this further, but I might continue with the
limitation of single direction from zigbee to wifi.

Regards
~ Andrew Stanton

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