From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stuffed Crust Subject: Re: wireless: recap of current issues (configuration) Date: Mon, 16 Jan 2006 15:58:59 -0500 Message-ID: <20060116205859.GD12748@shaftnet.org> References: <20060113221935.GJ16166@tuxdriver.com> <1137191522.2520.63.camel@localhost> <20060114011726.GA19950@shaftnet.org> <43C97605.9030907@pobox.com> <20060115152034.GA1722@shaftnet.org> <43CAA853.8020409@errno.com> <20060116172817.GB8596@shaftnet.org> <43CBDDC7.9060504@errno.com> <20060116194013.GA12748@shaftnet.org> <43CBFE90.8070208@errno.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="5gxpn/Q6ypwruk0T" Cc: Jeff Garzik , Johannes Berg , netdev@vger.kernel.org, linux-kernel@vger.kernel.org Return-path: To: Sam Leffler Content-Disposition: inline In-Reply-To: <43CBFE90.8070208@errno.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org --5gxpn/Q6ypwruk0T Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Jan 16, 2006 at 12:14:08PM -0800, Sam Leffler wrote: > Please read what I wrote again. Station mode power save work involves=20 > communicating with the ap and managing the hardware. The first=20 > interacts with bg scanning. We haven't even talked about how to handle= =20 > sta mode power save. I think we're arguing over semantics; what's important here is that the STA tells the AP to buffer frames while we're performing a scan, correct? =20 > If you wait until the end of the scan to return to the bss channel then= =20 > you potentially miss buffered mcast frames. You can up the station's=20 > listen interval but that only gets you so far. As I said there are=20 > tradeoffs in doing this. An excellent point. This is particularly relevant for APs that have a DTIM interval of 1 -- if you're doing a passive scan, the dwell time on that other channel (you need at least one beacon interval) could cause you to miss bufferend MCAST frames. In all fairness I don't think I've seen any implementations that handle this cleanly. - Solomon --=20 Solomon Peachy ICQ: 1318344 Melbourne, FL =20 Quidquid latine dictum sit, altum viditur. --5gxpn/Q6ypwruk0T Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) iD8DBQFDzAkTPuLgii2759ARAm3JAJ9TPFf5WKVjYZ7jrn65IiFzJEAuiACgu2qZ l7BzmAzAGElff9QpgNACfBY= =dOnv -----END PGP SIGNATURE----- --5gxpn/Q6ypwruk0T--