Re: [802.21] Two Questions of standard IEEE P802.21/D9.1
To David,
Thanks for your answering.
To everyone,
It looks like the latest version is Draft D10.0, right?
Since I am new here, so I have little problem to get in the "private area".
Can anyone tell me how can I get in there?
Sincerely yours,
Shunneng Yang
Software Engineer
Information and Communication Research Labs, ITRI
Tel. : +886-3-591-2286 (O)
E-mail: aaroh0407@gmail.com
2008/5/1 David Cypher <david.cypher@nist.gov>:
> Shunneng Yang,
>
> First 802.21/D9.1 was an interim version. It was a version generated from
> D9.0 with only some of the comments received from the Sponsor Ballot D9.0
> applied. Therefore it does not surprise me that you have questions/problems
> with it.
>
> David Cypher
> ===================
>
>
> At 09:13 AM 4/30/2008, Shun-Neng Yang wrote:
> > Hello everyone,
> >
> > I am new here. Recently, I studied standard "IEEE P802.21/D9.1", and
> > I have two questions to ask:
> >
> > Q1. The SAP "MIH_Link_Actions.request" has 2 entries: (MIHF_ID and
> > LIST(LINK_ACTION_REQ)).
> >
> > According to Table B-4, LINK_ACTION_REQ is derived from
> > SEQUENCE(LINK_ID, CHOICE(NULL, LINK_ADDR), LINK_ACTION,
> > LINK_AC_EX_TIME), and LINK_ACTION is derived from
> > SEQUENCE(LINK_AC_TYPE, LINK_AC_ATTR), their definitions are listed in
> > Table B-5 and B-6 respectively.
> >
> > Let's take a look at the flow chart in page.270, here the
> > SEQUENCE(LINK_AC_TYPE, LINK_AC_ATTR) in MIH_Link_Actions.request
> > should be (0: NONE, LINK_SCAN), is it right?
> > If it is, then in page.271, what is the content of
> > SEQUENCE(LINK_AC_TYPE, LINK_AC_ATTR) in MIH_Link_Actions.request?
> > If the SEQUENCE here is (4: LINK_POWER_UP, DATA_FWD_REQ), then why the
> > link is "powered up" here?
> > If it isn't powered up, then how can we do the "LINK_SCAN" in the
> > MIH_Link_Actions.request in page.270?
> >
> > Should we modify the definitions of "4: LINK_POWER_UP" and add a new
> > definition "5: CONNECT" for LINK_AC_TYPE in Table B-5?
> > Then the definitions of LINK_POWER_UP and CONNECT may be "Turn on the
> > radio and cause the link to power up" and "Establish L2 connectivity"
> > respectively.
> >
>
> That was four versions ago. Text and figures have changed. I do not think
> that your comment exists in the latest draft.
>
>
>
> > Q2. The SAP "Link_Up.indication" has 5 entries: (LinkIdentifier,
> > OldAccessRouter, NewAccessRouter, IPRenewalFlag, Mobility Management
> > Support).
> >
> > Although the 4 entries (OldAccessRouter, NewAccessRouter,
> > IPRenewalFlag, Mobility Management Support) are optional, they are
> > layer-3 parameters. This indication is generated by layer-2, then
> > should these 4 entries be listed here?
> >
>
> The OldAccessRouter and NewAccessRouter are link-layer addresses, not
> layer-3 addresses.
> As for the other two IPRenewalFlag and Mobility Management Support, this
> information may be available to the link-layer. For example through beacon
> messages.
>
>
>