RE: GPRS Tunnel Protocol (GTP)

Hi,

Not sure if you are asking about how the mobility management in GPRS compares
with Mobile IP base mobility control.   Since you have mentioned GTP in GPRS,
there are a couple of issues  to clarify  before  even comparing their
"performances":


1) In GPRS/UMTS network,  the  mobility management is GPRS specific. To put it
simply, it is based on GTP in combination with handover control in RAN. It does
Not use Mobile IP.


2) There has been no standard yet  about where and  how Mobile IP is used in or
between  GPRS/UMTS  PLMN's although there were some discussions in the past
about how Mobile IPv4 can be integrated into GPRS/UMTS architecture.

3) If GPRS mobility management and Mobile IP based mobility are "compared",  it
is important to remember that they operate at different levels/layers: GPRS
mobility management operates at the GPRS bearer level while Mobile IP operates
at the IP layer which is above the GPRS bearer.


4) Mobile IPv6, however, is expected to have some impact on some  operations on
GPRS/UMTS, especially on IPv6 (only) IMS. This is  because Mobile IPv6 runs on
an end-to-end basis, i.e, an IPv6 GPRS/UMTS terminal can activate MIPv6 with its
peers without the knowledge of the intermediate GPRS/UMTS systems. We have done
some analysis. The details can be found in an I-D located at
http://www.ietf.org/internet-drafts/draft-chen-mobileip-packet-fitlering-xc-01.txt
.



Although it would be interesting to see how the performance of GPRS mobility
compares  that of Mobile IP based mobility, I am not sure if they are directly
comparable.


Xiaobao Chen

Orange PCS







"Ashish Sharma" <[email protected]> on 23/07/2003 14:13:49




To:   "Anurag Uxa" <[email protected]>
      "Amir Hermelin" <[email protected]>
cc:   [email protected]
      [email protected] (bcc: Xiaobao CHEN/EN/HTLUK)


Subject:  RE: [mobile-ip] GPRS Tunnel Protocol (GTP)



Hi

since we are on this, i needed some information on how does GPRS stand vis a
vis mobile IP in terms of --
packet routing efficiency, round trip delays (from a client's perspective),
packet loss, ability to provide handoffs (vertical and horizontal), etc

please let know if there are any sources where i could get this information
from ?

thanks.

regards,
Ashish



-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of Anurag Uxa
Sent: Wednesday, July 23, 2003 3:53 PM
To: Amir Hermelin
Cc: [email protected]; [email protected]
Subject: Re: [mobile-ip] GPRS Tunnel Protocol (GTP)


GSM 09.60 may help you.
it is  for GTP across the Gn and Gp Interface.

Regard's
Anurag Uxa


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