[ns] ZigBee routing simulation

[Ning Wen]

Hi All,

I am new to ns2 and I am working on a project related to
ZigBee routing. After searching the web, I found Jianliang Zheng had
developed an IEEE 802.15.4 module for ns2 (http://ees2cy.engr.ccny.cuny.edu/zheng/pub/).
He also mentioned that "ZigBee routing is now maintained by ZigBee NWK
WG and no longer included in this release." But I cannot find the
implementation by ZigBee WG. 

Can anyone give me some advise on if there is any public available implementation of ZigBee routing? 

Thanks in advance!
Best,
Ning