RE: stds-802-mobility: Hand-off question
Good morning,
If .20 is to replace 3G, how do the major telco's adopt it? All at once?
One huge investment with exactly zero existing subscriber base?
Or, is there a way to pursue more responsible incremental investment. Can we
give the telcos a way to offer .20 as an additional benefit from which they
may derive both lower costs and higher ARPUs? Can we easily overlay initial
metro trials by overlaying onto something already in place?
The most threatening competitor is one employing subterfuge founded upon its
opponent's success.
Sure, .20 will eventually win because it is better. But then Beta was
better than VHS, right?
How do we get .20 up the launch curve fast? It co-opts 2.5G and 3G success
by co-existing. It allows service providers to offer both seemlessly until
subcribers move away from 2.5/3G to .20.
Note: I'm not a telco guy, just being practical.
Regards,
Ken Harvey
-----Original Message-----
From: owner-stds-802-mobility@majordomo.ieee.org
[mailto:owner-stds-802-mobility@majordomo.ieee.org]On Behalf Of
wujianjun
Sent: Thursday, April 24, 2003 8:11 PM
To: Joanne Wilson
Cc: stds-802-mobility@ieee.org
Subject: Re: stds-802-mobility: Hand-off question
All,
First,it is well known that the handoff include commonly:
1) Within MBWA
-- Inter-cell
-- Inter-sector
-- Inter-carrier
if MBWA does not support handoff within MBWA, then it is essentially a
hot-spot application.
As such, what will be the usage cases where it delivers better customer
experience than 802.11? the rather that 802.20 is a MAN! So, the handoff
within MBWA system must be supported!
2) Inter-technology
-- WLAN
-- 3G
-- GSM,etc.
We know,802.20 is not a complementarity to 3g but a competitor or a
replacer! Because it is MAN, not a WLAN such as 802.11.
If 802.20 is a complementarity to 3G or existing technology, we should not
hesitate to consider supporting handoff between MBWA and 3G. Is it? No,
It isn't!
Here note that we should not hesitate to consider supporting communication
between 802.20 and 3G.
Second, we can discuss the handoff among technologies from implementary
mode, we know the handoff mode
1) Network-controlled handoff
2) Mobile-controlled handoff
If adopt the first mode,
-- it need have distinct mobility controller and base stations creates
artificial separation between handoffs and other PHY/MAC/LLC activities.
-- Does not fit well with IETF decentralized mobility mgmt protocols such as
Mobile IP
-- Limitations on scalability and flexibility
Furthermore, I think that the handoff among technologies adopting
network-controlled mode is not feasible. we assume that
3G network belongs to Vendor A, and 802.20 MBWA network belongs to Vendor B,
when a Mobile may handoff between the two networks, Vendor A and Vendor B
all hope certainly the Mobile still stay at own network.
If adopt the second mode, I think the Mobile will become very expensive.
Best Regards,
Wujianjun--Huawei