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@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