Subject: Re: [Megaco] Error in H.248.41 IP Realm Availability package

From: Charlie Ross <[email-masked]>
Date: Fri, 29 Apr 2011 12:33:45 -0400

For what it's worth, I agree that removing the extension relationship is probably the way to go.  The IP Realm Availability package definition actually makes references to the "ipdc/realm" property as though the latter was a  exclusively part a separate package rather than being inherited through extension.

Charlie Ross
Media Gateway Design Architect
Ericsson BCAM Business Unit
email: [email-masked]

> Hello Charlie,  cc: Arturo,
> 
> Yes it appears that you are correct the available realms property in the ipra package does cause a conflict. It > either should be binary ID 0x0002 or the package extension should be removed in order to address the issue. > > > Ericsson was the original editor of this work item. This Recommendation is also used by Tispan/3GPP so we would > need to consider this when deciding on a path to take.
> 
> Removing the extension is probably the safest path to take. Any other opinions?
> 
> Regards, Christian
> 
> On 26/04/2011 6:28 AM, Charlie Ross wrote:
> > Hello,
> > In H.248.41 Amendment 1, the IP Realm Availability (ipra) package is 
> > defined as extending the IP Domain Connection (ipdc) package.  IP 
> > Realm Availability has a property, "available realms" (ar), that is 
> > assigned binary property ID 0x0001.  This appears to clash with the 
> > inherited "realm" property that is assigned property ID 0x0001 in the 
> > parent IP Domain Connection package.  From other examples of package 
> > extension that I have seen, it seems that the available realms 
> > property should have been given a binary ID that is unique within the 
> > IP Realm Availability definition, such as 0x0002.  This would allow 
> > both properties to be referenced through IP Realm Availability 
> > [package ID: 0x00e0].
> > ipra/realm [0x00e00001]
> > ipra/ar [0x00e00001?  or 0x00e00002]
> > Is this possibly an oversight in the standard or is there some other 
> > way to distinguish these properties within IP Realm Availability when 
> > using binary encoding?
> > Thanks for your insights,
> > /*Charlie Ross*/
> > Media Gateway Design Architect
> > Ericsson BCAM Business Unit
> > _email_: [email-masked]