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      1 /*	$OpenBSD: ieee80211_amrr.h,v 1.3 2006/06/17 19:34:31 damien Exp $	*/
      2 /*	$NetBSD: ieee80211_amrr.h,v 1.1 2006/10/31 21:53:41 joerg Exp $	*/
      3 
      4 /*-
      5  * Copyright (c) 2006
      6  *	Damien Bergamini <damien.bergamini (at) 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 ieee80211_amrr {
     36 	u_int	amrr_min_success_threshold;
     37 	u_int	amrr_max_success_threshold;
     38 };
     39 
     40 #define IEEE80211_AMRR_MIN_SUCCESS_THRESHOLD	 1
     41 #define IEEE80211_AMRR_MAX_SUCCESS_THRESHOLD	15
     42 
     43 /*
     44  * Rate control state for a given node.
     45  */
     46 struct ieee80211_amrr_node {
     47 	u_int	amn_success;
     48 	u_int	amn_recovery;
     49 	u_int	amn_success_threshold;
     50 	u_int	amn_txcnt;
     51 	u_int	amn_retrycnt;
     52 };
     53 
     54 void	ieee80211_amrr_node_init(struct ieee80211_amrr *,
     55 	    struct ieee80211_amrr_node *);
     56 void	ieee80211_amrr_choose(struct ieee80211_amrr *, struct ieee80211_node *,
     57 	    struct ieee80211_amrr_node *);
     58 
     59 #endif /* _NET80211_IEEE80211_AMRR_H_ */
     60