transport layer for MIH IS.

["David Xiang" <dzxiang@ztesandiego.com>]

When we consider the complexity of .21 implementation and interaction with
other media standard, we need to think of our transport layer for
information service exchange with network or peer, though it seems out of
scope of .21 from most of the proposals.
I saw two ideas of transport layer from the proposals: IP application, and
L2. I just want to get your thoughts on which one is better.

IP:
Pros: 1. Generic and less impact on other media standard,
      2. Give more implementation flexibility for .21 information service
         and other requirements.
      3. More easy to be implemented.

Cons:   1. slow
        2. Not reliable or robust as L2 transport, but IP application can
         become robust with some good mechanisms.

L2:
Pros: 1. faster
      2. More robust

Cons: 1. Too rely on other media standard which may not good for .21
         implementation.
      2. Not flexible, any time .21 do some changes on SI, it may request
         all other media standard to do some changes too.

Any thoughts?

Thanks,

David