[Ecrit] Emergency Address Directory section (<draft-schulzrinne-ecrit-requirements-01.txt>)

["Tschofenig, Hannes" <hannes.tschofenig at siemens.com>]

hi all, 

please find my comments below (#). 

i think that this section should be merged with the previous section
since most requirements directly relate to the mapping protocol.

7.  Emergency Address Directory


   D1.  PSAP Identification:  The mapping information MUST be available
      without having to enroll with a service provider.

# what mapping information? 
# how does this relate to psap identification? 

# this seems to be an operational requirement, if i understood it
correctly. isn't this already covered by R1 partially?  should this, if
needed at all, be moved to section 3? 


      Motivation: The mapping server may well be operated by a service
      provider, but access to the server offering the mapping MUST NOT
      require use of a specific ISP or VSP.

# motivation should not juse capitalized MUST, MAY, SHOULD, etc. 

   D5.  Call setup latency: The directory lookup SHOULD minimize any
      added delay to the call setup.

# i suggest not to talk about call setup latency. we are working on a
mapping protocol. how can we control things that are outside the  scope
of our work? 
# i understand if we have a requirement like:

# Efficiency: The mapping protocol SHOULD have a minimum number of
roundtrips. 

      Motivation:  Since outbound proxies will likely be asked to
      resolve the same geographic coordinates repeatedly, a suitable
      time-limited caching mechanism should be supported.

# the motivation does not match the requirement. if we think that there
is a requirement for caching then we should phrase is at such. 

   D7.  Referral: The querier MUST be able to contact any server and be
      referred to another server that is more qualified to answer the
      query.

      Motivation:  This requirement alleviates the potential for
      misconfigurations to cause calls to fail, particularly for caller-
      based queries.

# this requirement should be related to I3. place them next to each
other. 


   D9.  Baseline query protocol: A mandatory-to-implement protocol MUST
      be specified.

      Motivation:  An over-abundance of similarly-capable choices
      appears undesirable for interoperability.

ciao
hannes


_______________________________________________
Ecrit mailing list
Ecrit at ietf.org
https://www1.ietf.org/mailman/listinfo/ecrit