roaming & context transfer

[NEENA M S]

Hi,
  I have some doubts on roaming & context 
  transfer.

   When a stations roams from AP1(AccessPoint 1) to
   AP2, how & what parameters need to be transferred?what is information in
the context block?how the context is defined?what is the format of 802.11
context information?is it vendor specific?
   . How about the WEP Keys  transfer from AP1 to AP2?
   Is there any specific format which any document
   specifies ?? Or it should be vendor specific??
   If so how about interoperability ??

Thanks & Regards
neena


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