Thread Links Date Links
Thread Prev Thread Next Thread Index Date Prev Date Next Date Index

RE: 802.21 Teleconference: L2 Requirements for 802.11



Hi Vivek,
 
Thanks a lot for your prompt response.
 
I think generally the questions need to be answered before the requirements can be passed to 11. Some comments below:
 

>In general there were lots of questions and some issues identified as well around Information Service and IEs.

>Which IEs are really applicable to different access networks and which are more independent of different access networks?

 

[Cheng]

I guess this has to be sort out by the .21 before passing any requirements to the media specific groups. Also it relateds to the question below. If the "support" of IE is just about providing transport means from PoA to MT, the question is a non-issue. However, if the "support" is also about the media specific technology also providing such info to the .21 IS Server, different requirements are implied.

[/Cheng]

 

>What does it mean for an access network to provide support for an IE?

 

[Cheng]

See above comment.

[/Cheng]

 

>If IEs are retrieved at L2 from PoA, is there an implicit assumption that the PoA knows how to communicate with 802.21 Information Server? Is this a 

>reasonable assumption?

 

[Cheng]

Does this also mean an interface from .21 IS server to be defined so that PoAs or others can access? Sounds this requires some more work at the .21 side.

[/Cheng] 

 

>Do we need to specify which IEs can be supported in unauthenticated state and which cannot?

 

[Cheng]

Probably we need to specify at which stage an IE may be exchanged, and which type of protection should be provided, e.g. authenticated. It is up to the specific media group to decide how to provide such protection. (or they may reply that such thing cannot be supported, then .21 probably needs to change the assumptions)

[/Cheng]

 
 
cheers
 
Cheng Hong
 


From: Gupta, Vivek G [mailto:vivek.g.gupta@intel.com]
Sent: Wednesday, August 17, 2005 11:01 AM
To: Cheng Hong; STDS-802-21@listserv.ieee.org
Subject: RE: 802.21 Teleconference: L2 Requirements for 802.11

 


From: Cheng Hong [mailto:Hong.Cheng@sg.panasonic.com]
Sent: Tuesday, August 16, 2005 7:33 PM
To: Gupta, Vivek G; STDS-802-21@listserv.ieee.org
Subject: RE: 802.21 Teleconference: L2 Requirements for 802.11

 

Hi Vivek,

 

Thanks a lot for the document. Sorry I could not make for the teleconf yesterday, but I got a few questions (sorry if they are already clarified during teleconf)

 

1) In Table 1, what is the use case for event 9 to 11? What is the defintion of Handoff? Is this a lower layer thing or application layer thing? 

[Vivek G Gupta] In my own opinion events 9-11 seem redundant/duplicate and may be eliminated from later version of 802.21 drafts.

 

2) Regarding table 2, in the column of "MIHF<>MIHF", are those indicating bi-directional relationship or unidirectional?

[Vivek G Gupta] believe these are Bidirectional..

 

E.g. when it is "Client<>Network PoA", does it mean "From Client to Network PoA", or "between Client and Network PoA"?

[Vivek G Gupta]  Between client and network PoA. The command could be sent by either the client or network PoA depending on client initiated or network initiated handovers. Current ongoing architectural discussions may have impact on these.

 

3) The table 3, are these intend to be the payload to be carried by the 11 protocol, or are they the IEs to be defined in 11? 

[Vivek G Gupta] We discussed these in detail and most of the meeting time was spent on Information Service and IEs. These are IEs and some of these (those relevant to 802.11 MAC/PHY need to be defined by 802.11). Others are more general and independent of MAC/PHY…

 

4) In table 3, item 2, why the 11 network needs to indicate support of other type of networks,e.g. 16 and GSM, etc. And, is the intension to have all the network types in the same namespace instead of subgroups, e.g. 11-subtypes, 16-subtypes, cellular-subtypes...etc?

[Vivek G Gupta] We may need to organize this information better.

This particular information may not directly come from .11 access network but from 802.21 Information Server. 802.11 may not need to do any thing in this case.

 

5) In table 3, item 6, what does this mean? Is this the location of the PoA or the Terminal? In 11, if this is the terminal location, it may mean a different requirement on the 11 specification, ie. to provide meansurement capability for an accurate terminal location.

[Vivek G Gupta] It’s the location of PoA…

 

6) Table 3, item 7, can this support both IP versions?

[Vivek G Gupta] Not sure what you mean here..maybe the Type field (Enumerated) is incorrect, but again 802.11 may not need to do anything for this IE.

 

7) Table 3, item 9, for a 11 network, probably the most important type is "Generic IP Service". Also, not sure about how the "supported" means, e.g. "VPN" has many types..

[Vivek G Gupta] Yes we did talk about these and again this information may come from 802.21 Information server and 802.11 may not need to define anything.

In general there were lots of questions and some issues identified as well around Information Service and IEs.

Which IEs are really applicable to different access networks and which are more independent of different access networks?

What does it mean for an access network to provide support for an IE?

If IEs are retrieved at L2 from PoA, is there an implicit assumption that the PoA knows how to communicate with 802.21 Information Server? Is this a reasonable assumption?

Do we need to specify which IEs can be supported in unauthenticated state and which cannot?

 

cheers 

Cheng Hong

 


From: stds-802-21@ieee.org [mailto:stds-802-21@ieee.org] On Behalf Of Gupta, Vivek G
Sent: Tuesday, August 16, 2005 3:24 AM
To: STDS-802-21@listserv.ieee.org
Subject: RE: 802.21 Teleconference: L2 Requirements for 802.11

 

Attached is an initial document listing some of the requirements for 802.11 media type.

We shall discuss these requirements tomorrow and then update them further.

Please feel free to send in your comments and suggested amendments.

 

Best Regards

-Vivek

 


From: stds-802-21@ieee.org [mailto:stds-802-21@ieee.org] On Behalf Of Gupta, Vivek G
Sent: Monday, August 15, 2005 6:54 AM
To: STDS-802-21@listserv.ieee.org
Subject: 802.21 Teleconference: L2 Requirements for 802.11

 

The next 802.21 telecon on L2 Requirements for 802.11 will be held as per below.

Please plan on joining us then.

 

Date: August 16, 2005, 9:00 AM EST

Phone: 916-356-2663, Bridge: 3, Passcode: 0566976

Lines: 25

 

Best Regards

-Vivek