[ns] How to distinguish Queues belong to which node ?

[Joe]

Hi all, 
    
     I'm working on simulation of MobileIP.
     After my BaseStation receive my control packet, I want to ask BaseStation start forwarding buffered packets. But in Queue class , I can't get any info about BaseStation node to distinguish which BaseStation hold this Queue. Is there any way to distinguish Queues belong to which node ? So I can know which BaseStation should activate.
      Any reply or suggestion will be appreciative.

      Best regards,
      -Joe