1178354Ssam/* $FreeBSD$ */ 2178354Ssam/* $NetBSD: ieee80211_rssadapt.h,v 1.4 2005/02/26 22:45:09 perry Exp $ */ 3178354Ssam/*- 4178354Ssam * Copyright (c) 2003, 2004 David Young. All rights reserved. 5178354Ssam * 6178354Ssam * Redistribution and use in source and binary forms, with or 7178354Ssam * without modification, are permitted provided that the following 8178354Ssam * conditions are met: 9178354Ssam * 1. Redistributions of source code must retain the above copyright 10178354Ssam * notice, this list of conditions and the following disclaimer. 11178354Ssam * 2. Redistributions in binary form must reproduce the above 12178354Ssam * copyright notice, this list of conditions and the following 13178354Ssam * disclaimer in the documentation and/or other materials provided 14178354Ssam * with the distribution. 15178354Ssam * 3. The name of David Young may not be used to endorse or promote 16178354Ssam * products derived from this software without specific prior 17178354Ssam * written permission. 18178354Ssam * 19178354Ssam * THIS SOFTWARE IS PROVIDED BY David Young ``AS IS'' AND ANY 20178354Ssam * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 21178354Ssam * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 22178354Ssam * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL David 23178354Ssam * Young BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 24178354Ssam * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 25178354Ssam * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26178354Ssam * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 27178354Ssam * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 28178354Ssam * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29178354Ssam * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 30178354Ssam * OF SUCH DAMAGE. 31178354Ssam */ 32178354Ssam#ifndef _NET80211_IEEE80211_RSSADAPT_H_ 33178354Ssam#define _NET80211_IEEE80211_RSSADAPT_H_ 34178354Ssam 35178354Ssam/* Data-rate adaptation loosely based on "Link Adaptation Strategy 36178354Ssam * for IEEE 802.11 WLAN via Received Signal Strength Measurement" 37178354Ssam * by Javier del Prado Pavon and Sunghyun Choi. 38178354Ssam */ 39178354Ssam 40178354Ssam/* Buckets for frames 0-128 bytes long, 129-1024, 1025-maximum. */ 41178354Ssam#define IEEE80211_RSSADAPT_BKTS 3 42178354Ssam#define IEEE80211_RSSADAPT_BKT0 128 43178354Ssam#define IEEE80211_RSSADAPT_BKTPOWER 3 /* 2**_BKTPOWER */ 44178354Ssam 45178354Ssamstruct ieee80211_rssadapt { 46206358Srpaulo const struct ieee80211vap *vap; 47178354Ssam int interval; /* update interval (ticks) */ 48178354Ssam}; 49178354Ssam 50178354Ssamstruct ieee80211_rssadapt_node { 51178354Ssam struct ieee80211_rssadapt *ra_rs; /* backpointer */ 52178354Ssam struct ieee80211_rateset ra_rates; /* negotiated rates */ 53178354Ssam int ra_rix; /* current rate index */ 54178354Ssam int ra_ticks; /* time of last update */ 55178354Ssam int ra_last_raise; /* time of last rate raise */ 56178354Ssam int ra_raise_interval; /* rate raise time threshold */ 57178354Ssam 58178354Ssam /* Tx failures in this update interval */ 59178354Ssam uint32_t ra_nfail; 60178354Ssam /* Tx successes in this update interval */ 61178354Ssam uint32_t ra_nok; 62178354Ssam /* exponential average packets/second */ 63178354Ssam uint32_t ra_pktrate; 64178354Ssam /* RSSI threshold for each Tx rate */ 65178354Ssam uint16_t ra_rate_thresh[IEEE80211_RSSADAPT_BKTS] 66178354Ssam [IEEE80211_RATE_SIZE]; 67178354Ssam}; 68178354Ssam 69178354Ssam#define IEEE80211_RSSADAPT_SUCCESS 1 70178354Ssam#define IEEE80211_RSSADAPT_FAILURE 0 71178354Ssam#endif /* _NET80211_IEEE80211_RSSADAPT_H_ */ 72