/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* Copyright (c) 2003, 2004 David Young. All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* with the distribution.
* 3. The name of David Young may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY David Young ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL David
* Young BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*/
#ifndef _RAL_RATE_H
#define _RAL_RATE_H
#pragma ident "%Z%%M% %I% %E% SMI"
#ifdef __cplusplus
extern "C" {
#endif
/*
* Data-rate adaptation loosely based on "Link Adaptation Strategy
* for IEEE 802.11 WLAN via Received Signal Strength Measurement"
* by Javier del Prado Pavon and Sunghyun Choi.
*/
/* Buckets for frames 0-128 bytes long, 129-1024, 1025-maximum. */
#define ral_rssadapt_thresh_new \
#define ral_rssadapt_decay_new \
#define ral_rssadapt_avgrssi_new \
struct ral_rssadapt_expavgctl {
/* RSS threshold decay. */
/* RSS threshold update. */
/* RSS average update. */
};
struct ral_rssadapt {
/* exponential average RSSI << 8 */
/* Tx failures in this update interval */
/* Tx successes in this update interval */
/* RSSI threshold for each Tx rate */
};
/* Properties of a Tx packet, for link adaptation. */
struct ral_rssdesc {
};
void ral_rate_init(void);
void ral_rssadapt_updatestats(struct ral_rssadapt *);
struct ral_rssadapt *, int);
void ral_rssadapt_lower_rate(struct ieee80211com *,
struct ieee80211_node *, struct ral_rssadapt *,
struct ral_rssdesc *);
void ral_rssadapt_raise_rate(struct ieee80211com *,
struct ral_rssadapt *, struct ral_rssdesc *);
int ral_rssadapt_choose(struct ral_rssadapt *,
const char *, int);
#ifdef __cplusplus
}
#endif
#endif /* _RAL_RATE_H */