ieee80211_rssadapt.h revision 1.3.2.2
1 1.3.2.2 skrll /* $NetBSD: ieee80211_rssadapt.h,v 1.3.2.2 2004/08/03 10:54:21 skrll Exp $ */ 2 1.3.2.2 skrll /*- 3 1.3.2.2 skrll * Copyright (c) 2003, 2004 David Young. All rights reserved. 4 1.3.2.2 skrll * 5 1.3.2.2 skrll * Redistribution and use in source and binary forms, with or 6 1.3.2.2 skrll * without modification, are permitted provided that the following 7 1.3.2.2 skrll * conditions are met: 8 1.3.2.2 skrll * 1. Redistributions of source code must retain the above copyright 9 1.3.2.2 skrll * notice, this list of conditions and the following disclaimer. 10 1.3.2.2 skrll * 2. Redistributions in binary form must reproduce the above 11 1.3.2.2 skrll * copyright notice, this list of conditions and the following 12 1.3.2.2 skrll * disclaimer in the documentation and/or other materials provided 13 1.3.2.2 skrll * with the distribution. 14 1.3.2.2 skrll * 3. The name of David Young may not be used to endorse or promote 15 1.3.2.2 skrll * products derived from this software without specific prior 16 1.3.2.2 skrll * written permission. 17 1.3.2.2 skrll * 18 1.3.2.2 skrll * THIS SOFTWARE IS PROVIDED BY David Young ``AS IS'' AND ANY 19 1.3.2.2 skrll * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 20 1.3.2.2 skrll * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 21 1.3.2.2 skrll * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL David 22 1.3.2.2 skrll * Young BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 23 1.3.2.2 skrll * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 24 1.3.2.2 skrll * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 1.3.2.2 skrll * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 26 1.3.2.2 skrll * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 27 1.3.2.2 skrll * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 1.3.2.2 skrll * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 29 1.3.2.2 skrll * OF SUCH DAMAGE. 30 1.3.2.2 skrll */ 31 1.3.2.2 skrll 32 1.3.2.2 skrll /* Data-rate adaptation loosely based on "Link Adaptation Strategy 33 1.3.2.2 skrll * for IEEE 802.11 WLAN via Received Signal Strength Measurement" 34 1.3.2.2 skrll * by Javier del Prado Pavon and Sunghyun Choi. 35 1.3.2.2 skrll */ 36 1.3.2.2 skrll 37 1.3.2.2 skrll /* Buckets for frames 0-128 bytes long, 129-1024, 1025-maximum. */ 38 1.3.2.2 skrll #define IEEE80211_RSSADAPT_BKTS 3 39 1.3.2.2 skrll #define IEEE80211_RSSADAPT_BKT0 128 40 1.3.2.2 skrll #define IEEE80211_RSSADAPT_BKTPOWER 3 /* 2**_BKTPOWER */ 41 1.3.2.2 skrll 42 1.3.2.2 skrll #define ieee80211_rssadapt_thresh_new \ 43 1.3.2.2 skrll (ieee80211_rssadapt_thresh_denom - ieee80211_rssadapt_thresh_old) 44 1.3.2.2 skrll #define ieee80211_rssadapt_decay_new \ 45 1.3.2.2 skrll (ieee80211_rssadapt_decay_denom - ieee80211_rssadapt_decay_old) 46 1.3.2.2 skrll #define ieee80211_rssadapt_avgrssi_new \ 47 1.3.2.2 skrll (ieee80211_rssadapt_avgrssi_denom - ieee80211_rssadapt_avgrssi_old) 48 1.3.2.2 skrll 49 1.3.2.2 skrll struct ieee80211_rssadapt_expavgctl { 50 1.3.2.2 skrll /* RSS threshold decay. */ 51 1.3.2.2 skrll u_int rc_decay_denom; 52 1.3.2.2 skrll u_int rc_decay_old; 53 1.3.2.2 skrll /* RSS threshold update. */ 54 1.3.2.2 skrll u_int rc_thresh_denom; 55 1.3.2.2 skrll u_int rc_thresh_old; 56 1.3.2.2 skrll /* RSS average update. */ 57 1.3.2.2 skrll u_int rc_avgrssi_denom; 58 1.3.2.2 skrll u_int rc_avgrssi_old; 59 1.3.2.2 skrll }; 60 1.3.2.2 skrll 61 1.3.2.2 skrll struct ieee80211_rssadapt { 62 1.3.2.2 skrll /* exponential average RSSI << 8 */ 63 1.3.2.2 skrll u_int16_t ra_avg_rssi; 64 1.3.2.2 skrll /* Tx failures in this update interval */ 65 1.3.2.2 skrll u_int32_t ra_nfail; 66 1.3.2.2 skrll /* Tx successes in this update interval */ 67 1.3.2.2 skrll u_int32_t ra_nok; 68 1.3.2.2 skrll /* exponential average packets/second */ 69 1.3.2.2 skrll u_int32_t ra_pktrate; 70 1.3.2.2 skrll /* RSSI threshold for each Tx rate */ 71 1.3.2.2 skrll u_int16_t ra_rate_thresh[IEEE80211_RSSADAPT_BKTS] 72 1.3.2.2 skrll [IEEE80211_RATE_SIZE]; 73 1.3.2.2 skrll struct timeval ra_last_raise; 74 1.3.2.2 skrll struct timeval ra_raise_interval; 75 1.3.2.2 skrll }; 76 1.3.2.2 skrll 77 1.3.2.2 skrll /* Properties of a Tx packet, for link adaptation. */ 78 1.3.2.2 skrll struct ieee80211_rssdesc { 79 1.3.2.2 skrll u_int id_len; /* Tx packet length */ 80 1.3.2.2 skrll u_int id_rateidx; /* index into ni->ni_rates */ 81 1.3.2.2 skrll struct ieee80211_node *id_node; /* destination STA MAC */ 82 1.3.2.2 skrll u_int8_t id_rssi; /* destination STA avg RSS @ 83 1.3.2.2 skrll * Tx time 84 1.3.2.2 skrll */ 85 1.3.2.2 skrll }; 86 1.3.2.2 skrll 87 1.3.2.2 skrll void ieee80211_rssadapt_updatestats(struct ieee80211_rssadapt *); 88 1.3.2.2 skrll void ieee80211_rssadapt_input(struct ieee80211com *, struct ieee80211_node *, 89 1.3.2.2 skrll struct ieee80211_rssadapt *, int); 90 1.3.2.2 skrll void ieee80211_rssadapt_lower_rate(struct ieee80211com *, 91 1.3.2.2 skrll struct ieee80211_node *, struct ieee80211_rssadapt *, 92 1.3.2.2 skrll struct ieee80211_rssdesc *); 93 1.3.2.2 skrll void ieee80211_rssadapt_raise_rate(struct ieee80211com *, 94 1.3.2.2 skrll struct ieee80211_rssadapt *, struct ieee80211_rssdesc *); 95 1.3.2.2 skrll int ieee80211_rssadapt_choose(struct ieee80211_rssadapt *, 96 1.3.2.2 skrll struct ieee80211_rateset *, struct ieee80211_frame *, u_int, int, 97 1.3.2.2 skrll const char *, int); 98 1.3.2.2 skrll #ifdef IEEE80211_DEBUG 99 1.3.2.2 skrll extern int ieee80211_rssadapt_debug; 100 1.3.2.2 skrll #endif /* IEEE80211_DEBUG */ 101
Indexes created Thu Oct 02 10:09:58 GMT 2025