RE: stds-80220-requirements: 802.20 Requirements: Handoff - 2
I believe handoff to other networks are layer 3. But handoff to another
802.20 base station is a layer 2. I make the difference because the packet
sizing, message formats ma be different with different specifications.
You should also be aware that 802.1 bridge handles the handoff between 802
systems.
alan
-----Original Message-----
From: Lalit Kotecha [mailto:lkotecha@sbcglobal.net]
Sent: Friday, October 24, 2003 5:26 PM
To: Chickinsky, Alan; 'Stds-80220-Requirements (E-mail)'
Subject: Re: stds-80220-requirements: 802.20 Requirements: Handoff - 2
Alan,
I am not very active in this group, but I have a concern about your comments
on handoff. Yes, handoff may be a layer3 functionality (not aalways
necessary), but to support handoff, PHY and MAC needs to perform some tasks
like channel measurements (signal strength, channels quality like BER, FER).
Also, PHY MAC design needs to take care of situation to provide enough time
to provide channel measurements (in terms of radio time).
If 802.20 needs to support handoff with other systems, PHY/MAC needs to
providesome capability, though it is harder task to draw a line that what is
part of PHY/MAC and layer3.
Jim listed five other wireless systems to support handoff with. Does anyone
specify/design system to inter-operate with majority of the wireless
systems?
my 2c if it adds any value.
Thanks
Lalit Kotecha
----- Original Message -----
From: "Chickinsky, Alan" <alan.chickinsky@ngc.com>
To: "'Stds-80220-Requirements (E-mail)'" <stds-80220-requirements@ieee.org>
Sent: Friday, October 24, 2003 2:09 PM
Subject: RE: stds-80220-requirements: 802.20 Requirements: Handoff - 2
>
> Jim-
>
> interms of the IOS model, I assume handoff occurs at layer 3. And we do
> not define layer 3. So I conclude that your proposed text is nice, but it
> is not part of the specification we will produce.
>
> alan
>
> -----Original Message-----
> From: James Tomcik [mailto:jtomcik@qualcomm.com]
> Sent: Thursday, October 23, 2003 3:26 PM
> To: 'Stds-80220-Requirements (E-mail)'
> Subject: stds-80220-requirements: 802.20 Requirements: Handoff - 2
>
>
>
>
> Attached is some text for the requirements document on handoff (802.20 to
> other systems). These sections were deleted because there was no
> contributed requirement in this area.
>
> Rationale:
> To support 3G service continuity and interworking with other deployed
> systems, handoff support is essential to an efficiently operating 802.20
> system. Since many emerging services are IP-based handoff support is
> advocated for these. Because of the high-speed aspects of the 802.20 air
> interface, and the latencies involved with network level handoff,
> mechanisms incorporated below the network layer are essential to service
> continuity. For example, several handoffs per minute between a 3G system
> and an 802.20 system may be required.
>
> Proposed to include the following:
>
> 4.4.x 3G Interworking and Handoff
>
> The Air Interface shall include handoff support with 3G systems below the
> IP layer. Handoff mechanisms defined shall insure the uninterrupted flow
> of data to and from the Mobile Station at rates up to 2 handoffs per
> minute. 802.20 Mobile Stations and Base Stations shall support at
minimum:
> a. Handoff with cdma2000 1x systems
> b. Handoff with WCDMA systems
> c. Handoff with cdma 1xEV-DO (rev "0" and rev A) systems
> d. Handoff with GSM/GPRS Systems
> e. Handoff with EDGE Systems
>
>
>
> ==========================================================
>
> -=================================
>
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> ......
>
> James D. Tomcik
> QUALCOMM, Incorporated
> (858) 658-3231 (Voice)
> (619) 890-9537 (Cellular)
> From: San Diego, CA
> PGP: 5D0F 93A6 E99D 39D8 B024 0A9B 6361 ACE9 202C C780
>
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> ......