1b032f27cSSam Leffler /* $NetBSD: ieee80211_rssadapt.h,v 1.4 2005/02/26 22:45:09 perry Exp $ */ 2b032f27cSSam Leffler /*- 3*fe267a55SPedro F. Giffuni * SPDX-License-Identifier: BSD-3-Clause 4*fe267a55SPedro F. Giffuni * 5b032f27cSSam Leffler * Copyright (c) 2003, 2004 David Young. All rights reserved. 6b032f27cSSam Leffler * 7b032f27cSSam Leffler * Redistribution and use in source and binary forms, with or 8b032f27cSSam Leffler * without modification, are permitted provided that the following 9b032f27cSSam Leffler * conditions are met: 10b032f27cSSam Leffler * 1. Redistributions of source code must retain the above copyright 11b032f27cSSam Leffler * notice, this list of conditions and the following disclaimer. 12b032f27cSSam Leffler * 2. Redistributions in binary form must reproduce the above 13b032f27cSSam Leffler * copyright notice, this list of conditions and the following 14b032f27cSSam Leffler * disclaimer in the documentation and/or other materials provided 15b032f27cSSam Leffler * with the distribution. 16b032f27cSSam Leffler * 3. The name of David Young may not be used to endorse or promote 17b032f27cSSam Leffler * products derived from this software without specific prior 18b032f27cSSam Leffler * written permission. 19b032f27cSSam Leffler * 20b032f27cSSam Leffler * THIS SOFTWARE IS PROVIDED BY David Young ``AS IS'' AND ANY 21b032f27cSSam Leffler * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22b032f27cSSam Leffler * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 23b032f27cSSam Leffler * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL David 24b032f27cSSam Leffler * Young BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 25b032f27cSSam Leffler * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 26b032f27cSSam Leffler * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27b032f27cSSam Leffler * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 28b032f27cSSam Leffler * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29b032f27cSSam Leffler * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30b032f27cSSam Leffler * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 31b032f27cSSam Leffler * OF SUCH DAMAGE. 32b032f27cSSam Leffler */ 33b032f27cSSam Leffler #ifndef _NET80211_IEEE80211_RSSADAPT_H_ 34b032f27cSSam Leffler #define _NET80211_IEEE80211_RSSADAPT_H_ 35b032f27cSSam Leffler 36b032f27cSSam Leffler /* Data-rate adaptation loosely based on "Link Adaptation Strategy 37b032f27cSSam Leffler * for IEEE 802.11 WLAN via Received Signal Strength Measurement" 38b032f27cSSam Leffler * by Javier del Prado Pavon and Sunghyun Choi. 39b032f27cSSam Leffler */ 40b032f27cSSam Leffler 41b032f27cSSam Leffler /* Buckets for frames 0-128 bytes long, 129-1024, 1025-maximum. */ 42b032f27cSSam Leffler #define IEEE80211_RSSADAPT_BKTS 3 43b032f27cSSam Leffler #define IEEE80211_RSSADAPT_BKT0 128 44b032f27cSSam Leffler #define IEEE80211_RSSADAPT_BKTPOWER 3 /* 2**_BKTPOWER */ 45b032f27cSSam Leffler 46b032f27cSSam Leffler struct ieee80211_rssadapt { 47b6108616SRui Paulo const struct ieee80211vap *vap; 48b032f27cSSam Leffler int interval; /* update interval (ticks) */ 49b032f27cSSam Leffler }; 50b032f27cSSam Leffler 51b032f27cSSam Leffler struct ieee80211_rssadapt_node { 52b032f27cSSam Leffler struct ieee80211_rssadapt *ra_rs; /* backpointer */ 53b032f27cSSam Leffler struct ieee80211_rateset ra_rates; /* negotiated rates */ 54b032f27cSSam Leffler int ra_rix; /* current rate index */ 55b032f27cSSam Leffler int ra_ticks; /* time of last update */ 56b032f27cSSam Leffler int ra_last_raise; /* time of last rate raise */ 57b032f27cSSam Leffler int ra_raise_interval; /* rate raise time threshold */ 58b032f27cSSam Leffler 59b032f27cSSam Leffler /* Tx failures in this update interval */ 60b032f27cSSam Leffler uint32_t ra_nfail; 61b032f27cSSam Leffler /* Tx successes in this update interval */ 62b032f27cSSam Leffler uint32_t ra_nok; 63b032f27cSSam Leffler /* exponential average packets/second */ 64b032f27cSSam Leffler uint32_t ra_pktrate; 65b032f27cSSam Leffler /* RSSI threshold for each Tx rate */ 66b032f27cSSam Leffler uint16_t ra_rate_thresh[IEEE80211_RSSADAPT_BKTS] 67b032f27cSSam Leffler [IEEE80211_RATE_SIZE]; 68b032f27cSSam Leffler }; 69b032f27cSSam Leffler 70b032f27cSSam Leffler #define IEEE80211_RSSADAPT_SUCCESS 1 71b032f27cSSam Leffler #define IEEE80211_RSSADAPT_FAILURE 0 72b032f27cSSam Leffler #endif /* _NET80211_IEEE80211_RSSADAPT_H_ */ 73