Re: [STDS-802-11-TGM] Support for .11ac beamforming in non-infrastructur

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> Before TGmc go ahead and indicate that VHT Beamforming (or at least, the VHT NDP Announcement frame) works only in an infrastructure network,

> I’d like to solicit input from the participants of the original work as to whether it was intended for VHT beamforming to work in IBSS, mesh and outside BSS contexts.

Prima facie, I see no reason why beamforming needs to be restricted to

infrastructure BSSen. A beam can in principle be formed between any two

stations irrespective of their roles and of the BSS type.

Mark

Mark RISON, Standards Architect, WLAN English/Esperanto/Français

Samsung Cambridge Solution Centre Tel: +44 1223 434600

Innovation Park, Cambridge CB4 0DS Fax: +44 1223 434601

ROYAUME UNI WWW: http://www.samsung.com/uk

From: ***** IEEE stds-802-11-tgm List ***** [mailto:STDS-802-11-TGM@xxxxxxxx] On Behalf Of Stephens, Adrian P
Sent: 5 May 2016 14:08
To: STDS-802-11-TGM@xxxxxxxxxxxxxxxxx
Subject: [STDS-802-11-TGM] Support for .11ac beamforming in non-infrastructure

--- This message came from the IEEE 802.11 Task Group M Technical Reflector ---

Dear TGm and TGax participants,

(Including TGax because many of those involved in TGac are participating there).

TGmc is considering a comment on mechanism introduced in 802.11ac thus:

comments
Selected	CID	Page	Clause	Resn Status	Comment	Proposed Change	Resolution	Owning Ad-hoc
0	7770	615.36	9.3.1.20		It says "If the VHT NDP Announcement frame contains only one STA Info field, then the RA field is set to the address of the STA identified by the AID in the STA Info field.", but the AID in the STA Info field cannot identify a STA, if that STA is in fact an AP or a mesh STA or an IBSS STA. Also, there's no AID in the STA Info field	Change to "If the VHT NDP Announcement frame contains only one STA Info field and the frame is directed to a non-AP STA in an infrastructure BSS, then the RA field is set to the address of the STA identified by the AID12 subfield in the STA Info field."		MAC

The issue is that the VHT NDP Announcement frame uses AID to identify STAs, but AIDs exist only

in infrastructure networks. So what to do in a non-infrastructure network?

Before TGmc go ahead and indicate that VHT Beamforming (or at least, the VHT NDP Announcement frame) works only in an infrastructure network,

I’d like to solicit input from the participants of the original work as to whether it was intended for VHT beamforming to work in IBSS, mesh and outside BSS contexts.

Comments welcome.

Best Regards,

Adrian P STEPHENS

Tel: +44 (1793) 404825 (office)
Tel: +1 (971) 330 6025 (mobile)

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Re: [STDS-802-11-TGM] Support for .11ac beamforming in non-infrastructure