1*085ff963SMatthew Dillon /* $FreeBSD$ */ 232176cfdSRui Paulo /* $NetBSD: ieee80211_rssadapt.h,v 1.4 2005/02/26 22:45:09 perry Exp $ */ 332176cfdSRui Paulo /*- 432176cfdSRui Paulo * Copyright (c) 2003, 2004 David Young. All rights reserved. 532176cfdSRui Paulo * 632176cfdSRui Paulo * Redistribution and use in source and binary forms, with or 732176cfdSRui Paulo * without modification, are permitted provided that the following 832176cfdSRui Paulo * conditions are met: 932176cfdSRui Paulo * 1. Redistributions of source code must retain the above copyright 1032176cfdSRui Paulo * notice, this list of conditions and the following disclaimer. 1132176cfdSRui Paulo * 2. Redistributions in binary form must reproduce the above 1232176cfdSRui Paulo * copyright notice, this list of conditions and the following 1332176cfdSRui Paulo * disclaimer in the documentation and/or other materials provided 1432176cfdSRui Paulo * with the distribution. 1532176cfdSRui Paulo * 3. The name of David Young may not be used to endorse or promote 1632176cfdSRui Paulo * products derived from this software without specific prior 1732176cfdSRui Paulo * written permission. 1832176cfdSRui Paulo * 1932176cfdSRui Paulo * THIS SOFTWARE IS PROVIDED BY David Young ``AS IS'' AND ANY 2032176cfdSRui Paulo * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 2132176cfdSRui Paulo * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 2232176cfdSRui Paulo * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL David 2332176cfdSRui Paulo * Young BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 2432176cfdSRui Paulo * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 2532176cfdSRui Paulo * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2632176cfdSRui Paulo * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 2732176cfdSRui Paulo * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 2832176cfdSRui Paulo * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2932176cfdSRui Paulo * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 3032176cfdSRui Paulo * OF SUCH DAMAGE. 3132176cfdSRui Paulo */ 3232176cfdSRui Paulo #ifndef _NET80211_IEEE80211_RSSADAPT_H_ 3332176cfdSRui Paulo #define _NET80211_IEEE80211_RSSADAPT_H_ 3432176cfdSRui Paulo 3532176cfdSRui Paulo /* Data-rate adaptation loosely based on "Link Adaptation Strategy 3632176cfdSRui Paulo * for IEEE 802.11 WLAN via Received Signal Strength Measurement" 3732176cfdSRui Paulo * by Javier del Prado Pavon and Sunghyun Choi. 3832176cfdSRui Paulo */ 3932176cfdSRui Paulo 4032176cfdSRui Paulo /* Buckets for frames 0-128 bytes long, 129-1024, 1025-maximum. */ 4132176cfdSRui Paulo #define IEEE80211_RSSADAPT_BKTS 3 4232176cfdSRui Paulo #define IEEE80211_RSSADAPT_BKT0 128 4332176cfdSRui Paulo #define IEEE80211_RSSADAPT_BKTPOWER 3 /* 2**_BKTPOWER */ 4432176cfdSRui Paulo 4532176cfdSRui Paulo struct ieee80211_rssadapt { 464028af95SRui Paulo const struct ieee80211vap *vap; 4732176cfdSRui Paulo int interval; /* update interval (ticks) */ 4832176cfdSRui Paulo }; 4932176cfdSRui Paulo 5032176cfdSRui Paulo struct ieee80211_rssadapt_node { 5132176cfdSRui Paulo struct ieee80211_rssadapt *ra_rs; /* backpointer */ 5232176cfdSRui Paulo struct ieee80211_rateset ra_rates; /* negotiated rates */ 5332176cfdSRui Paulo int ra_rix; /* current rate index */ 5432176cfdSRui Paulo int ra_ticks; /* time of last update */ 5532176cfdSRui Paulo int ra_last_raise; /* time of last rate raise */ 5632176cfdSRui Paulo int ra_raise_interval; /* rate raise time threshold */ 5732176cfdSRui Paulo 5832176cfdSRui Paulo /* Tx failures in this update interval */ 5932176cfdSRui Paulo uint32_t ra_nfail; 6032176cfdSRui Paulo /* Tx successes in this update interval */ 6132176cfdSRui Paulo uint32_t ra_nok; 6232176cfdSRui Paulo /* exponential average packets/second */ 6332176cfdSRui Paulo uint32_t ra_pktrate; 6432176cfdSRui Paulo /* RSSI threshold for each Tx rate */ 6532176cfdSRui Paulo uint16_t ra_rate_thresh[IEEE80211_RSSADAPT_BKTS] 6632176cfdSRui Paulo [IEEE80211_RATE_SIZE]; 6732176cfdSRui Paulo }; 6832176cfdSRui Paulo 6932176cfdSRui Paulo #define IEEE80211_RSSADAPT_SUCCESS 1 7032176cfdSRui Paulo #define IEEE80211_RSSADAPT_FAILURE 0 7132176cfdSRui Paulo #endif /* _NET80211_IEEE80211_RSSADAPT_H_ */ 72