1 | /* $NetBSD: ieee80211_rssadapt.h,v 1.9 2016/04/08 14:30:47 roy Exp $ */ |
2 | /*- |
3 | * Copyright (c) 2003, 2004 David Young. All rights reserved. |
4 | * |
5 | * Redistribution and use in source and binary forms, with or |
6 | * without modification, are permitted provided that the following |
7 | * conditions are met: |
8 | * 1. Redistributions of source code must retain the above copyright |
9 | * notice, this list of conditions and the following disclaimer. |
10 | * 2. Redistributions in binary form must reproduce the above |
11 | * copyright notice, this list of conditions and the following |
12 | * disclaimer in the documentation and/or other materials provided |
13 | * with the distribution. |
14 | * |
15 | * THIS SOFTWARE IS PROVIDED BY David Young ``AS IS'' AND ANY |
16 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
17 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A |
18 | * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL David |
19 | * Young BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
20 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED |
21 | * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
23 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
24 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
25 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY |
26 | * OF SUCH DAMAGE. |
27 | */ |
28 | |
29 | #ifndef _NET80211_IEEE80211_RSSADAPT_H_ |
30 | #define |
31 | |
32 | /* Data-rate adaptation loosely based on "Link Adaptation Strategy |
33 | * for IEEE 802.11 WLAN via Received Signal Strength Measurement" |
34 | * by Javier del Prado Pavon and Sunghyun Choi. |
35 | */ |
36 | |
37 | /* Buckets for frames 0-128 bytes long, 129-1024, 1025-maximum. */ |
38 | #define 3 |
39 | #define 128 |
40 | #define 3 /* 2**_BKTPOWER */ |
41 | |
42 | #define \ |
43 | (ieee80211_rssadapt_thresh_denom - ieee80211_rssadapt_thresh_old) |
44 | #define \ |
45 | (ieee80211_rssadapt_decay_denom - ieee80211_rssadapt_decay_old) |
46 | #define \ |
47 | (ieee80211_rssadapt_avgrssi_denom - ieee80211_rssadapt_avgrssi_old) |
48 | |
49 | struct { |
50 | /* RSS threshold decay. */ |
51 | u_int ; |
52 | u_int ; |
53 | /* RSS threshold update. */ |
54 | u_int ; |
55 | u_int ; |
56 | /* RSS average update. */ |
57 | u_int ; |
58 | u_int ; |
59 | }; |
60 | |
61 | struct { |
62 | /* exponential average RSSI << 8 */ |
63 | u_int16_t ; |
64 | /* Tx failures in this update interval */ |
65 | u_int32_t ; |
66 | /* Tx successes in this update interval */ |
67 | u_int32_t ; |
68 | /* exponential average packets/second */ |
69 | u_int32_t ; |
70 | /* RSSI threshold for each Tx rate */ |
71 | u_int16_t [IEEE80211_RSSADAPT_BKTS] |
72 | [IEEE80211_RATE_SIZE]; |
73 | struct timeval ; |
74 | struct timeval ; |
75 | }; |
76 | |
77 | /* Properties of a Tx packet, for link adaptation. */ |
78 | struct { |
79 | u_int ; /* Tx packet length */ |
80 | u_int ; /* index into ni->ni_rates */ |
81 | struct ieee80211_node *; /* destination STA MAC */ |
82 | u_int8_t ; /* destination STA avg RSS @ |
83 | * Tx time |
84 | */ |
85 | }; |
86 | |
87 | void (struct ieee80211_rssadapt *); |
88 | void (struct ieee80211com *, struct ieee80211_node *, |
89 | struct ieee80211_rssadapt *, int); |
90 | void (struct ieee80211com *, |
91 | struct ieee80211_node *, struct ieee80211_rssadapt *, |
92 | struct ieee80211_rssdesc *); |
93 | void (struct ieee80211com *, |
94 | struct ieee80211_rssadapt *, struct ieee80211_rssdesc *); |
95 | int (struct ieee80211_rssadapt *, |
96 | struct ieee80211_rateset *, struct ieee80211_frame *, u_int, int, |
97 | const char *, int); |
98 | #ifdef IEEE80211_DEBUG |
99 | extern int ; |
100 | #endif /* IEEE80211_DEBUG */ |
101 | |
102 | #endif /* !_NET80211_IEEE80211_RSSADAPT_H_ */ |
103 | |
104 | |