Changed SHALL to MUST
Clean up text:
REQ2: Transparency to Upper Layers when needed
The DMM solutions MUST provide transparency above the IP layer
when needed. Such transparency is needed, when the mobile
hosts or entire mobile networks [RFC3963] change their point
of attachment to the Internet, for the application flows that
cannot cope with a change of IP address. Otherwise the
support to maintain a stable home IP address or prefix during
handover may be declined.
Motivation: The motivation of this requirement is to enable
more efficient use of network resources and more efficient
routing by not maintaining a stable IP home IP address when
there is no such need.
This requirement addresses the problems PS5 as well as the other
related problem O-PS1.
PS5: Wasting resources to support mobile nodes not needing mobility
support
IP mobility support is not always required. For example, some
applications do not need a stable IP address during handover,
i.e., IP session continuity. Sometimes, the entire application
session runs while the terminal does not change the point of
attachment. In these situations that do not require IP
mobility support, network resources are wasted when mobility
context is set up.
O-PS1: Mobility signaling overhead with peer-to-peer communication
Wasting resources when mobility signaling (e.g., maintenance
of the tunnel, keep alive, etc.) is not turned off for peer-
to-peer communication.
H Anthony Chan
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of h chan
Sent: Wednesday, June 06, 2012 12:24 PM
To: Charles E. Perkins
Cc: Peter McCann; [email protected]
Subject: Re: [DMM] draft requirement REQ-2: Transparency to Upper Layers
How about the following change:
REQ-2: Transparency to Upper Layers
The DMM solutions SHALL provide transparency above the IP layer when needed.
Such transparency is needed, when the mobile hosts or entire mobile networks
change their point of attachment to the Internet, for the application flows
that cannot cope with a change of IP address. Otherwise the support to maintain
a stable home IP address or prefix during handover may be declined.
H Anthony Chan
-----Original Message-----
From: Charles E. Perkins [mailto:[email protected]]
Sent: Tuesday, June 05, 2012 5:39 PM
To: h chan
Cc: [email protected]; Peter McCann; jouni korhonen
Subject: Re: [DMM] draft requirement REQ-2: Transparency to Upper Layers
On 6/5/2012 10:12 AM, h chan wrote:
> Revise as follows:
>
> REQ-2: Transparency to Upper Layers
> The DMM solutions SHALL provide transparency above the IP layer when needed.
> Such transparency is needed, when the mobile hosts or entire mobile networks
> change their point of attachment to the Internet, for the application flows
> that cannot cope with a change of IP address, but the need to maintain a
> stable home IP address or prefix SHOULD NOT be taken as default.
> REQ-2M (Motivation for REQ-2)
> The goal of this requirement is to enable more efficient use of network
> resources and more efficient routing by not maintaining a stable IP home IP
> address when there is no such need.
>
> H Anthony Chan
I think it should be possible for the user of a device to set which behavior
is to be considered the default behavior for all applications on that
device.
This would leave open the possibility that, unless the user specifies
otherwise,
the device would be configured to have "unstable" addressing as default.
--
Regards,
Charlie P.
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