Subject: Re: [MOBILE-IP] THEMA & 3Gwireless

From: Yingchun Xu <[email-masked]>
Date: Mon, 8 Nov 1999 16:47:42 -0600

Hi, Ji-An,
In 3G wireless network, there are three places requiring mobility management:
1. BTS to BTS handoff
2. RNN (or BSC) to RNN handoff and
3. PDSN (or FA) to PDSN handoff.

If you see FA as the boundary of the access network, the first two handoffs  are
within the radio access network except they are at different levels.

--Yingchun.

Zhao Ji-An <[email-masked]> on 11/05/99 09:41:43 PM

Please respond to Zhao Ji-An <[email-masked]>

Sent by:  Zhao Ji-An <[email-masked]>

To:   [email-masked]
cc:    (Yingchun Xu/MW/US/3Com)
Subject:  [MOBILE-IP] THEMA & 3Gwireless

Hello All,

When comparing

Transparent Hierarchical Mobility Agents (THEMA) and

Mobile IP Based Mocro Mobility Management Protocol in
the Third Generation Wireless Network (3Gwireless),

we can find there are much similarities.
In my understanding, the function of PDSN in 3Gwireless
is just the same as that of foreign agent SA in THEMA,
except that in 3Gwireless there is only one hop
from the FA to MN
while in THEMA there might be several hops.

My question is, if we have THEMA, do we have any
advantage to use 3Gwireless?
Also, it seems 3Gwireless provides a solution to
integrate CDMA2000 radio networks with Mobile IP,
but actually the micro mobility is managed within
the CDMA2000 networks.
Is it more appropriate to change the 3Gwireless
title to

Integration of the Third Generation Wireless Network
with Mobile IP

Please correct me if my understanding is wrong.
Thanks,

Zhao Jian

Department of Computer Science
Hong Kong University of Science & Technology
Hong Kong