Return-path: Received: from crystal.sipsolutions.net ([195.210.38.204]:52641 "EHLO sipsolutions.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751757AbYBTS4r (ORCPT ); Wed, 20 Feb 2008 13:56:47 -0500 Subject: Re: implementing APSD? From: Johannes Berg To: Sam Leffler Cc: Tomas Winkler , linux-wireless , Ron Rindjunsky , Nick Kossifidis , Michael Renzmann , "Luis R. Rodriguez" , bruno randolf In-Reply-To: <47BC76FC.7070109@errno.com> References: <1203521087.17534.74.camel@johannes.berg> <1ba2fa240802201043v1bd4fbddsc55c2230eb2a1480@mail.gmail.com> <47BC76FC.7070109@errno.com> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-XnqsqBwrR2asvqn9F9OM" Date: Wed, 20 Feb 2008 19:56:42 +0100 Message-Id: <1203533802.17534.83.camel@johannes.berg> (sfid-20080220_185651_206823_16A85D71) Mime-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org List-ID: --=-XnqsqBwrR2asvqn9F9OM Content-Type: text/plain Content-Transfer-Encoding: quoted-printable > >> Also, does Atheros hardware implement that, and how? It doesn't look > >> like Broadcom firmware implements it, and I don't really understand ho= w > >> one could implement it without many hardware queues, since it seems > >> timing critical to send out the frames to the station that is using > >> APSD. > >> > >> =20 > > Don't believe it's possible to that without HW support. > > =20 >=20 > Sorry, this is incorrect; you can do UAPSD w/o any special h/w support. How would you do it? As far as I understand you need to set the "more data" bit in an ACK frame. johannes --=-XnqsqBwrR2asvqn9F9OM Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Comment: Johannes Berg (powerbook) iQIVAwUAR7x36aVg1VMiehFYAQL5pA//aifrcV7LeFfnpar5vE7lf3oyzIqKIFms U9937EkG9JET4Tr5pBxRFZaecjSYw6w0B5UHmgDuK/E7CnV2fMt4StQUc6Po85kp d6svJ8alIMlCMqGn7tnUq+Gn3aMHw9leIIYDM59iE5g6BHg9zmazl10rcEuuH64v 3c02+AqS8s2JGY2jsEIIqI8mRllLXJJqp4T2oqYrjeqngj4UEagJ7tWuQgrhzekY XXhTwfmHNO+LGm9iS3kcCtNvLSOsO8MRJzmXiNemlEGPVOyHkqBg/UVv9mkHz1rA 2obWC1JSSIN42QqVngZ1TgaD/5oiC7pnQUo2L/lSCO25ps38JpFrW/sbXwekHttS 8/WFGFdlf/o2AQaoJvpxMNslGAsnVyYBYRImIGDg+94hOzDlg60WgUOPyHucDevE YukZHV0qHmeoZXAjVMc/4SigoenmCwFY3CG2XfmgyUcjLln6zzFe+7Idqm04llZW DFr/HtwfXqqtq7McFuTxXcnnds0uCBMOpFGahb/ucdp8CC+8stzzP14i7Gq7dx9y ELuJ5UCSFU6vgMmn59tkyfw9KwocopSTBcpKm79VZDBIzqNwtGS9CNXx8NOMG8eb 2bHR0ncTKvZ8nMbhuWNEUvGa0HXThBDF9qjmcKOaLyu7jJLQMMDEQYwHMON4DFHP rRveajy6/GU= =fa78 -----END PGP SIGNATURE----- --=-XnqsqBwrR2asvqn9F9OM--