sys/netproto/802_11/ieee80211_amrr.h

   1 /* $FreeBSD$ */
   2 /*      $OpenBSD: ieee80211_amrr.h,v 1.3 2006/06/17 19:34:31 damien Exp $       */
   3
   4 /*-
   5  * Copyright (c) 2006
   6  *      Damien Bergamini <damien.bergamini@free.fr>
   7  *
   8  * Permission to use, copy, modify, and distribute this software for any
   9  * purpose with or without fee is hereby granted, provided that the above
  10  * copyright notice and this permission notice appear in all copies.
  11  *
  12  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  13  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  14  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  15  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  16  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  17  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  18  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  19  */
  20 #ifndef _NET80211_IEEE80211_AMRR_H_
  21 #define _NET80211_IEEE80211_AMRR_H_
  22
  23 /*-
  24  * Naive implementation of the Adaptive Multi Rate Retry algorithm:
  25  *
  26  * "IEEE 802.11 Rate Adaptation: A Practical Approach"
  27  *  Mathieu Lacage, Hossein Manshaei, Thierry Turletti
  28  *  INRIA Sophia - Projet Planete
  29  *  http://www-sop.inria.fr/rapports/sophia/RR-5208.html
  30  */
  31
  32 /*
  33  * Rate control settings.
  34  */
  35 struct ieee80211vap;
  36
  37 struct ieee80211_amrr {
  38         u_int   amrr_min_success_threshold;
  39         u_int   amrr_max_success_threshold;
  40         int     amrr_interval;          /* update interval (ticks) */
  41 };
  42
  43 #define IEEE80211_AMRR_MIN_SUCCESS_THRESHOLD     1
  44 #define IEEE80211_AMRR_MAX_SUCCESS_THRESHOLD    15
  45
  46 /*
  47  * Rate control state for a given node.
  48  */
  49 struct ieee80211_amrr_node {
  50         struct ieee80211_amrr *amn_amrr;/* backpointer */
  51         int     amn_rix;                /* current rate index */
  52         int     amn_ticks;              /* time of last update */
  53         /* statistics */
  54         u_int   amn_txcnt;
  55         u_int   amn_success;
  56         u_int   amn_success_threshold;
  57         u_int   amn_recovery;
  58         u_int   amn_retrycnt;
  59 };
  60
  61 #endif /* _NET80211_IEEE80211_AMRR_H_ */