RRM: Channel Optimization based on Channel Utilization

Fixes: WIFI-13220
Signed-off-by: Tanya Singh <tanya_singh@accton.com>
This commit is contained in:
Tanya Singh
2024-08-02 19:07:46 +08:00
committed by John Crispin
parent 63899e09ce
commit 6d4f5b961e
8 changed files with 1039 additions and 1 deletions

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@@ -0,0 +1,31 @@
#!/bin/sh
. /lib/functions.sh
board=$(board_name)
case "$board" in
"edgecore,eap101")
ln -s /sys/kernel/debug/ath11k/ipq6018\ hw1.0/mac0/fw_stats/pdev_stats /tmp/pdev_stats_phy0
ln -s /sys/kernel/debug/ath11k/ipq6018\ hw1.0/mac1/fw_stats/pdev_stats /tmp/pdev_stats_phy1
;;
"edgecore,eap102")
ln -s /sys/kernel/debug/ath11k/ipq8074\ hw2.0/mac0/fw_stats/pdev_stats /tmp/pdev_stats_phy0
ln -s /sys/kernel/debug/ath11k/ipq8074\ hw2.0/mac1/fw_stats/pdev_stats /tmp/pdev_stats_phy1
;;
"edgecore,oap101e-6e"|\
"edgecore,oap101-6e")
ln -s /sys/kernel/debug/ath11k/ipq5018\ hw1.0/mac0/fw_stats/pdev_stats /tmp/pdev_stats_phy0
ln -s /sys/kernel/debug/ath11k/qcn6122_1/mac0/fw_stats/pdev_stats /tmp/pdev_stats_phy1
ln -s /sys/kernel/debug/ath11k/qcn6122_2/mac0/fw_stats/pdev_stats /tmp/pdev_stats_phy2
;;
"edgecore,oap101e"|\
"edgecore,oap101")
ln -s /sys/kernel/debug/ath11k/ipq5018\ hw1.0/mac0/fw_stats/pdev_stats /tmp/pdev_stats_phy0
ln -s /sys/kernel/debug/ath11k/qcn6122_1/mac0/fw_stats/pdev_stats /tmp/pdev_stats_phy1
;;
"edgecore,eap104")
ln -s /sys/kernel/debug/ath11k/ipq5018\ hw1.0/mac0/fw_stats/pdev_stats /tmp/pdev_stats_phy0
ln -s /sys/kernel/debug/ath11k/qcn6122_2/mac0/fw_stats/pdev_stats /tmp/pdev_stats_phy1
;;
esac

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@@ -0,0 +1,31 @@
#!/bin/sh
. /lib/functions.sh
board=$(board_name)
case "$board" in
"edgecore,eap101")
ln -s /sys/kernel/debug/ath11k/ipq6018\ hw1.0/mac0/fw_stats/pdev_stats /tmp/pdev_stats_phy0
ln -s /sys/kernel/debug/ath11k/ipq6018\ hw1.0/mac1/fw_stats/pdev_stats /tmp/pdev_stats_phy1
;;
"edgecore,eap102")
ln -s /sys/kernel/debug/ath11k/ipq8074\ hw2.0/mac0/fw_stats/pdev_stats /tmp/pdev_stats_phy0
ln -s /sys/kernel/debug/ath11k/ipq8074\ hw2.0/mac1/fw_stats/pdev_stats /tmp/pdev_stats_phy1
;;
"edgecore,oap101e-6e"|\
"edgecore,oap101-6e")
ln -s /sys/kernel/debug/ath11k/ipq5018\ hw1.0/mac0/fw_stats/pdev_stats /tmp/pdev_stats_phy0
ln -s /sys/kernel/debug/ath11k/qcn6122_1/mac0/fw_stats/pdev_stats /tmp/pdev_stats_phy1
ln -s /sys/kernel/debug/ath11k/qcn6122_2/mac0/fw_stats/pdev_stats /tmp/pdev_stats_phy2
;;
"edgecore,oap101e"|\
"edgecore,oap101")
ln -s /sys/kernel/debug/ath11k/ipq5018\ hw1.0/mac0/fw_stats/pdev_stats /tmp/pdev_stats_phy0
ln -s /sys/kernel/debug/ath11k/qcn6122_1/mac0/fw_stats/pdev_stats /tmp/pdev_stats_phy1
;;
"edgecore,eap104")
ln -s /sys/kernel/debug/ath11k/ipq5018\ hw1.0/mac0/fw_stats/pdev_stats /tmp/pdev_stats_phy0
ln -s /sys/kernel/debug/ath11k/qcn6122_2/mac0/fw_stats/pdev_stats /tmp/pdev_stats_phy1
;;
esac

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@@ -0,0 +1,31 @@
#!/bin/sh
. /lib/functions.sh
board=$(board_name)
case "$board" in
"edgecore,eap101")
ln -s /sys/kernel/debug/ath11k/ipq6018\ hw1.0/mac0/fw_stats/pdev_stats /tmp/pdev_stats_phy0
ln -s /sys/kernel/debug/ath11k/ipq6018\ hw1.0/mac1/fw_stats/pdev_stats /tmp/pdev_stats_phy1
;;
"edgecore,eap102")
ln -s /sys/kernel/debug/ath11k/ipq8074\ hw2.0/mac0/fw_stats/pdev_stats /tmp/pdev_stats_phy0
ln -s /sys/kernel/debug/ath11k/ipq8074\ hw2.0/mac1/fw_stats/pdev_stats /tmp/pdev_stats_phy1
;;
"edgecore,oap101e-6e"|\
"edgecore,oap101-6e")
ln -s /sys/kernel/debug/ath11k/ipq5018\ hw1.0/mac0/fw_stats/pdev_stats /tmp/pdev_stats_phy0
ln -s /sys/kernel/debug/ath11k/qcn6122_1/mac0/fw_stats/pdev_stats /tmp/pdev_stats_phy1
ln -s /sys/kernel/debug/ath11k/qcn6122_2/mac0/fw_stats/pdev_stats /tmp/pdev_stats_phy2
;;
"edgecore,oap101e"|\
"edgecore,oap101")
ln -s /sys/kernel/debug/ath11k/ipq5018\ hw1.0/mac0/fw_stats/pdev_stats /tmp/pdev_stats_phy0
ln -s /sys/kernel/debug/ath11k/qcn6122_1/mac0/fw_stats/pdev_stats /tmp/pdev_stats_phy1
;;
"edgecore,eap104")
ln -s /sys/kernel/debug/ath11k/ipq5018\ hw1.0/mac0/fw_stats/pdev_stats /tmp/pdev_stats_phy0
ln -s /sys/kernel/debug/ath11k/qcn6122_2/mac0/fw_stats/pdev_stats /tmp/pdev_stats_phy1
;;
esac

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@@ -0,0 +1,13 @@
#!/bin/sh
. /lib/functions.sh
board=$(board_name)
case "$board" in
"edgecore,eap105")
ln -s /sys/kernel/debug/ath12k/ipq5332\ hw1.0_c000000.wifi/mac0/fw_stats/pdev_stats /tmp/pdev_stats_phy0
ln -s /sys/kernel/debug/ath12k/qcn9274\ hw2.0_0001:01:00.0/mac0/fw_stats/pdev_stats /tmp/pdev_stats_phy1
ln -s /sys/kernel/debug/ath12k/qcn9274\ hw2.0_0001:01:00.0/mac1/fw_stats/pdev_stats /tmp/pdev_stats_phy2
;;
esac

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@@ -6,6 +6,9 @@ STOP=01
USE_PROCD=1
start_service() {
rm -rf /tmp/threshold_breach_count_phy*
rm -rf /tmp/fixed_channel_phy*
procd_open_instance
procd_set_param command /usr/bin/rrmd.uc
procd_set_param respawn 3600 5 0

View File

@@ -79,12 +79,17 @@ function lookup_phys() {
continue;
let p = { path, phyname, index: phy.wiphy };
p.channels = [];
p.dfs_channels = [];
p.htmode = [];
p.band = [];
for (let band in phy.wiphy_bands) {
for (let freq in band?.freqs) {
if (freq.disabled)
continue;
push(p.channels, freq2channel(freq.freq));
if (freq.radar)
push(p.dfs_channels, freq2channel(freq.freq));
if (freq.freq >= 6000)
push(p.band, '6G');
else if (freq.freq <= 2484)

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@@ -0,0 +1,918 @@
let board_info = global.ubus.conn.call('system', 'board');
let _pdev_stats = {};
let config = {
/* Channel utilization threshold: When Utilization of the current channel or adjacent channel reaches the configured threshold (in %), the AP switches to a different Channel.
Set this field to 0 to disable this feature. Range: 0-99 */
threshold: 0,
/* the periodicity for checking channel utilization (ms)*/
interval: 86400*1000,
/* the channel optimization algorithm: RCS (1)/ ACS(2) */
algo: 1,
/* the number of consecutive utilization threshold breaches allowed before Channel selection is triggered */
consecutive_threshold_breach: 1,
};
// total number of radios: default=2
let num_radios = 2;
let board_name = board_info.board_name;
switch(board_name) {
case 'edgecore,eap105':
case 'edgecore,oap101-6e':
case 'edgecore,oap101e-6e':
num_radios = 3;
break;
}
function stats_info_read(path) {
let res = trim(fs.readfile(path));
return res || 0;
}
function stats_info_write(path, value) {
let file = fs.open(path, 'w+');
if (!file)
return;
file.write(value);
file.close();
}
function cool_down_check(iface_num, cool_down_period) {
let now_t = time();
let cool_down_f= 0;
// check cool_down_period passed or not
let deltaTS = now_t - stats_info_read("/tmp/chan_switch_t" + iface_num);
ulog_info(`[wlan%d] Cool down check: current_time=%d, chan_switch_time=%d, deltaTS(time passed)=%d \n`, iface_num, now_t, stats_info_read("/tmp/chan_switch_t" + iface_num), deltaTS);
if (deltaTS < (cool_down_period/1000)) {
ulog_info(`[wlan%d] Need to cool down (%d seconds hasn't passed) before switching channel \n`, iface_num, cool_down_period/1000);
// Flag cool down
cool_down_f = 1;
}
return cool_down_f;
}
function update_channel_switch_time(iface_num) {
stats_info_write("/tmp/chan_switch_t" + iface_num, time());
}
function update_breach_count(iface_num, breach_count) {
stats_info_write("/tmp/threshold_breach_count_phy" + iface_num , breach_count);
}
function random_time_calc() {
// calculate random wait time before ACS is triggered based on the device SN
let device_SN;
let sn_flag = 0;
let unique_random;
let random_wait_time = 25;
let command = "fw_printenv SN";
let fp_SN = fs.popen(command);
device_SN = fp_SN.read('all');
fp_SN.close();
if (device_SN) {
unique_random = (match(trim(device_SN), /^(SN=EC)(\d+)/)[2]);
} else {
command = "fw_printenv serial_number";
let fp_serial_num = fs.popen(command);
device_SN = fp_serial_num.read('all');
fp_serial_num.close();
if (device_SN) {
unique_random = (match(trim(device_SN), /^(serial_number=EC)(\d+)/)[2]);
} else {
// If there's no valid SN, set a flag to get fixed random
sn_flag = 1;
}
}
if (sn_flag != 1) {
random_wait_time = unique_random % 25;
}
return random_wait_time;
}
function channel_to_freq(band, channel) {
if (band == '2g' && channel >= 1 && channel <= 13)
return 2407 + channel * 5;
else if (band == '2g' && channel == 14)
return 2484;
else if (band == '5g' && channel >= 7 && channel <= 177)
return 5000 + channel * 5;
else if (band == '5g' && channel >= 183 && channel <= 196)
return 4000 + channel * 5;
else if (band == '6g' && channel >= 5)
return 5950 + channel * 5;
else if (band == '60g' && channel >= 1 && channel <= 6)
return 56160 + channel * 2160;
return null;
}
function center_freq_calc(band, freq, bandwidth) {
if (band == '5g') {
if (bandwidth == 40)
return +freq + 10;
if (bandwidth == 80)
return +freq + 30;
if (bandwidth == 160)
return +freq + 70;
}
return +freq;
}
function channel_offset_calc(band, bandwidth) {
let offset=null;
if (band == '5g') {
if (bandwidth == 40)
offset = 1;
if (bandwidth == 80)
offset = 1;
}
return offset;
}
function interface_status_check(iface_num) {
ulog_info(`[wlan%d] Checking interface status ... \n`, iface_num);
let radio_status = 'DISABLED';
let radio_down_f = 0;
let curr_stat = global.ubus.conn.call(`hostapd.wlan${iface_num}`, 'get_status');
if (curr_stat) {
radio_status = curr_stat.status;
} else {
radio_status = "DISABLED";
radio_down_f = 1;
}
ulog_info(`[wlan%d] status: %s \n`, iface_num, radio_status);
return radio_down_f;
}
function check_current_channel(iface_num) {
// get wireless interface's live status & channel using "ubus call hostapd.wlan<iface_num> get_status"
let curr_stat = global.ubus.conn.call(`hostapd.wlan${iface_num}`, 'get_status');
let current_channel = curr_stat.channel;
if (curr_stat && current_channel) {
ulog_info(`[wlan%d] Current channel (from hostapd) = %d \n`, iface_num, current_channel);
}
return current_channel;
}
function rrmd_switch_channel(msg) {
ulog_info(`[wlan%d] Start switch channel to %d (%s)\n`, msg.phy, msg.channel, msg.bssid);
let chan_switch_status = 0;
let mode = lc(replace(msg.htmode, /[^a-zA-Z]/g, ''));
let bandwidth = replace(msg.htmode, /[^0-9]/g, '');
let target_freq = channel_to_freq(msg.band, msg.channel);
let center_freq = center_freq_calc(msg.band, target_freq, bandwidth);
let sec_channel_offset = channel_offset_calc(msg.band, bandwidth);
// use hostadp_cli command
if (target_freq != null) {
ulog_info(`Sending to hostapd (Chan %d):: freq=%d, center_freq=%d, sec_channel_offset=%d, bandwidth=%d, mode=%s \n`, msg.channel, target_freq, center_freq, sec_channel_offset, bandwidth, mode);
// system(`/usr/sbin/hostapd_cli -i wlan${msg.phy} chan_switch 5 ${target_freq} center_freq1=${center_freq} sec_channel_offset=${sec_channel_offset} bandwidth=${bandwidth} ${mode}`);
let command_hostapd = `/usr/sbin/hostapd_cli -i wlan${msg.phy} chan_switch 5 ${target_freq} center_freq1=${center_freq} sec_channel_offset=${sec_channel_offset} bandwidth=${bandwidth} ${mode}`;
let res = fs.popen(command_hostapd);
let res_check = trim(res.read('all'));
res.close();
if (res_check == "OK") {
ulog_info(`hostapd_cli chan_switch status: OK \n`);
chan_switch_status = 1;
update_channel_switch_time(msg.phy);
// reset breach count back to 0 as we are calling the channel selection algo
update_breach_count(msg.phy, 0);
} else {
ulog_info(`hostapd_cli chan_switch status: FAIL \n`);
}
}
else {
ulog_info(`Channel to frequency conversion fail \n`);
}
return chan_switch_status;
}
function switch_status_check(iface_num, radio_5G_index, dfs_enabled_5g_index) {
// need to wait for radio 5GHz interface to be UP, when DFS is enabled
if (dfs_enabled_5g_index == 1) {
ulog_info(`[wlan%d] 5G radio might need some time to be UP (DFS enabled) \n`, radio_5G_index);
let p = 0;
// Max 65 seconds wait for the DFS enabled interface to be UP
let timer = 70;
while (p < timer) {
ulog_info(`[wlan%d] Check#%d \n `, iface_num, p);
if (interface_status_check(iface_num) == 1) {
ulog_info(`[wlan%d] Interface not UP yet ... wait for 1 second \n`, iface_num);
sleep(1000);
p++;
if (p >= timer) {
ulog_info(`[wlan%d] Interface not UP yet ... cac_time is long \n`, iface_num);
return;
}
} else {
ulog_info(`[wlan%d] Interface is UP! \n`, iface_num);
break;
}
}
}
let current_chan = check_current_channel(iface_num);
return current_chan;
}
function dfs_chan_check(iface_num, rcs_channel) {
let phy_id = "phy" + iface_num;
let dfs_enabled_5g = 0;
let dfs_chan_list = global.phy.phys[phy_id].dfs_channels;
// check if rcs_channel is in dfs_channel list
for (let dfs_chan in dfs_chan_list) {
if (dfs_chan == rcs_channel) {
// flag up if dfs channel detected
dfs_enabled_5g = 1;
break;
}
}
return dfs_enabled_5g;
}
function fixed_channel_algo(iface_num, fixed_channel_f, auto_channel_f, fixed_chan_bkp, channel_config) {
// if fixed channel config is stored in the /tmp/fixed_channel_phyX file
if (fixed_channel_f == 1) {
if (auto_channel_f == 1) {
// if current channel is auto => change to fixed
ulog_info(`[wlan%d] Current channel is "auto"; Configured fixed channel was %d, reassigning fixed channel ...\n`, iface_num, fixed_chan_bkp);
// Set channel to the fixed channel
global.uci.set('wireless', 'radio' + iface_num, 'channel', fixed_chan_bkp);
global.uci.commit('wireless');
global.uci.apply;
} else if (auto_channel_f == 0) {
// if current channel is not auto => change to auto
ulog_info(`[wlan%d] Current channel is fixed (=%d), changing it to "auto" (=0) to trigger ACS \n`, iface_num, channel_config);
// Set channel to "auto"
global.uci.set('wireless', 'radio' + iface_num, 'channel', '0');
global.uci.commit('wireless');
global.uci.apply;
}
}
}
function get_chan_util(iface_num, sleep_time) {
let pdev_stats = {};
let chan_util = 0;
let prev_values = {
txFrameCount: null,
rxFrameCount: null,
rxClearCount: null,
cycleCount: null,
};
for (let c = 0; c < 2; c++) {
// Check tx and tx stats for wlanX interface
_pdev_stats[iface_num] = '/tmp/pdev_stats_phy' + iface_num;
let curr_values = {
txFrameCount: null,
rxFrameCount: null,
rxClearCount: null,
cycleCount: null,
};
pdev_stats = split(stats_info_read(_pdev_stats[iface_num]), "\n");
if (pdev_stats != null) {
for (let curr_value in pdev_stats) {
let txFrameCount = match(trim(curr_value), /^TX frame count(\s+\d+)/);
if (txFrameCount)
curr_values.txFrameCount = trim(txFrameCount[1]);
let rxFrameCount = match(trim(curr_value), /^RX frame count(\s+\d+)/);
if (rxFrameCount)
curr_values.rxFrameCount = trim(rxFrameCount[1]);
let rxClearCount = match(trim(curr_value), /^RX clear count(\s+\d+)/);
if (rxClearCount)
curr_values.rxClearCount = trim(rxClearCount[1]);
let cycleCount = match(trim(curr_value), /^Cycle count(\s+\d+)/);
if (cycleCount)
curr_values.cycleCount = trim(cycleCount[1]);
if (curr_values.txFrameCount && curr_values.rxFrameCount && curr_values.rxClearCount && curr_values.cycleCount) {
break;
}
}
let ignore = 0;
if (!prev_values.txFrameCount || !prev_values.rxFrameCount || !prev_values.rxClearCount || !prev_values.cycleCount) {
ignore = 1;
}
if ((curr_values.cycleCount) <= (prev_values.cycleCount) || (curr_values.txFrameCount) < (prev_values.txFrameCount) ||
(curr_values.rxFrameCount) < (prev_values.rxFrameCount) || (curr_values.rxClearCount) < (prev_values.rxClearCount)) {
ignore = 1;
}
if (ignore != 1) {
let cycle_count_delta = curr_values.cycleCount - prev_values.cycleCount;
/* let tx_count_delta = curr_values.txFrameCount - prev_values.txFrameCount;
let rx_count_delta = curr_values.rxFrameCount - prev_values.rxFrameCount; */
let rx_clear_delta = curr_values.rxClearCount - prev_values.rxClearCount;
let total_usage = (rx_clear_delta * 100) / cycle_count_delta;
/* let tx_usage = (tx_count_delta * 100) / cycle_count_delta;
let rx_usage = (rx_count_delta * 100) / cycle_count_delta; */
chan_util = total_usage;
}
prev_values.txFrameCount=curr_values.txFrameCount;
prev_values.rxFrameCount=curr_values.rxFrameCount;
prev_values.rxClearCount=curr_values.rxClearCount;
prev_values.cycleCount=curr_values.cycleCount;
}
sleep(sleep_time);
}
return chan_util;
}
function channel_selection(iface_num, band, htmode, chan_list_valid) {
let math = require('math');
let phy_id = "phy" + iface_num;
let bw = replace(htmode, /[^0-9]/g, '');
// channel list from the driver based on the country code
let chan_list_cc = global.phy.phys[phy_id].channels;
// complete channel list
let chan_list_default = {};
// allowed channel list to select random channel from
let chan_list_allowed = [];
let chan_list_init = [];
let chan_list_legal = [];
ulog_info(`[wlan%d] Channel list from the driver = %s \n`, iface_num, chan_list_cc);
ulog_info(`[wlan%d] Selected channel list from config (default channel list shall be used in case channels haven't been selected) = %s \n`, iface_num, chan_list_valid);
// default channel list
if (band == '5g') {
chan_list_default = {
"320": [ 0 ],
"160": [ 36, 100 ],
"80": [
36,
52,
100,
116,
132,
149,
165
],
"40": [
36, 44,
52, 60,
100, 108,
116, 124,
132, 140,
149, 157,
165
],
"20": [
36, 40, 44, 48,
52, 56, 60, 64,
100, 104, 108, 112,
116, 120, 124, 128,
132, 136, 140, 144,
149, 153, 157, 161,
165
]
};
} else if (band == '2g') {
chan_list_default = {
"20": [
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13
]
};
}
// initial channel list after comparing the default chan list based on current bw, and country code
for (let default_chan in chan_list_default[bw]) {
for (let cc_chan in chan_list_cc) {
if (default_chan == cc_chan){
push(chan_list_init, default_chan);
}
}
}
if (bw == "80" || bw == "40") {
// exclude last channels from the channel list when bw is 80MHz or 40MHz to avoid selecting a channel with a secondary channel that cannot be supported
chan_list_legal = slice(chan_list_init, 0, length(chan_list_init)-1) ;
} else {
chan_list_legal = chan_list_init;
}
if (chan_list_valid) {
// if channel list is provided in the wireless config, check if it is valid based on the bandwidth selected and the country code
for (let valid_chan in chan_list_valid) {
for (let legal_chan in chan_list_legal) {
if (valid_chan == legal_chan) {
push(chan_list_allowed, valid_chan);
}
}
}
} else {
// if channel list is not provided in the wireless config, check if the channel from the default channel list is valid based on the country code
chan_list_allowed = chan_list_legal;
}
ulog_info(`[wlan%d] Allowed channel list = %s \n`, iface_num, chan_list_allowed);
// select random channel from chan_list_allowed
let random_channel_idx = sprintf('%d', math.rand() % length(chan_list_allowed));
let random_channel = chan_list_allowed[random_channel_idx];
ulog_info(`[wlan%d] Selected random channel = %d \n`, iface_num, random_channel);
return random_channel;
}
function algo_rcs(iface_num, current_channel, band, htmode, selected_channels) {
let chosen_random_channel = 0;
let res = 0;
// channel_selection script will help to select random channel
chosen_random_channel = channel_selection(iface_num, band, htmode, selected_channels);
stats_info_write("/tmp/phy" + iface_num + "_rrmchan", chosen_random_channel);
if (chosen_random_channel == current_channel) {
ulog_info(`[wlan%d] RCS assigned the same channel = %d; Skip channel switch \n`, iface_num, chosen_random_channel);
res = 0;
} else if (chosen_random_channel > 0) {
ulog_info(`[wlan%d] RCS done ... random channel found = %d\n`, iface_num, chosen_random_channel);
res = 1;
} else {
ulog_info(`[wlan%d] RCS scan FAIL. Retry Channel optimization at next cycle \n`, iface_num);
res = 0;
}
return res;
}
function channel_optimize() {
let selected_algo;
switch (config.algo) {
case 1:
selected_algo = "RCS";
break;
case 2:
selected_algo = "ACS";
break;
default:
ulog_info(`No RRM algorithm based on Channel Utilization selected \n`);
return config.interval;
}
ulog_info(`Selected algorithm for RRM = %s \n`, selected_algo);
if (config.threshold == 0) {
ulog_info(`RRM config threshold is 0, RRM channel optimization will not be executed \n`);
return config.interval;
}
let current_rf_down = {};
let cool_down_f = {};
let check_all_cool_down = 0;
let cool_down_period = config.interval * 10;
let htmode = {};
let radio_band = {};
let acs_exclude_dfs = {};
let channel_config = {};
let selected_channels = {};
let radio_5G_index = 0;
let dfs_enabled_5g = {};
let bssid_mac = {};
// check the channel config used by the customer
let fixed_chan_bkp = {};
let fixed_channel_f = {};
let current_channel = {};
let auto_channel_f ={};
// sleep time between channel stats check (default: 5 sec)
let sleep_time = 5000;
// check chan util
let chan_util_value = {};
let check_all_chan_util = 0;
// check threshold breach
let threshold_breach_count = {};
let threshold_breach_f = {};
let check_all_threshold_breach = 0;
let check_threshold_breach_idx = {};
ulog_info(`Interval for checking Channel Utilization = %d seconds; Interval for cooling down = %d seconds \n`, config.interval/1000, cool_down_period/1000);
for (let j = 0; j < num_radios; j++) {
let radio_id = "radio" + j;
// check wlan interface status
current_rf_down[j] = interface_status_check(j);
if (current_rf_down[j] == 0) {
cool_down_f[j] = cool_down_check(j, cool_down_period);
if (cool_down_f[j] != 1) {
// default HT mode = HT20
htmode[j] = 'HT20';
// get wireless interface uci config from "ubus call network.wireless status"
let wireless_status = global.ubus.conn.call('network.wireless', 'status');
htmode[j] = wireless_status[radio_id].config.htmode;
radio_band[j] = wireless_status[radio_id].config.band;
acs_exclude_dfs[j] = wireless_status[radio_id].config.acs_exclude_dfs;
channel_config[j] = wireless_status[radio_id].config.channel;
selected_channels[j] = wireless_status[radio_id].config.channels;
if (radio_band[j] == '5g') {
radio_5G_index = j;
// check if DFS is enabled for 5G radio
if (acs_exclude_dfs[j] == false) {
dfs_enabled_5g[j] = 1;
}
}
if (selected_algo == "RCS") {
if (channel_config[j] == '0') {
ulog_info(`[wlan%d] Configured channel is "auto" \n`, j);
} else {
ulog_info(`[wlan%d] Configured channel is fixed at %d \n`, j, channel_config[j]);
}
if (selected_channels[j]) {
ulog_info(`[wlan%d] Selected channel list (please update the radio config, if not correct) = %s \n`, j, selected_channels[j]);
// should I check the validity of the chan list selected by the user??
}
} else if (selected_algo == "ACS") {
if (channel_config[j] != '0') {
ulog_info(`[wlan%d] Configured channel is fixed at %d \n`, j, channel_config[j]);
auto_channel_f[j] = 0;
stats_info_write("/tmp/fixed_channel_phy" + j, channel_config[j]);
fixed_channel_f[j] = 1;
} else {
ulog_info(`[wlan%d] Configured channel is "auto" \n`, j);
auto_channel_f[j] = 1;
// check if fixed channel exists
fixed_chan_bkp[j] = stats_info_read("/tmp/fixed_channel_phy" + j);
if (fixed_chan_bkp[j] > 0) {
ulog_info(`[wlan%d] Configured fixed channel was %d \n`, j, fixed_chan_bkp[j]);
fixed_channel_f[j] = 1;
}
}
}
// check current channel
current_channel[j] = check_current_channel(j);
// check current breach_count
let current_threshold_breach_count = 0;
current_threshold_breach_count = stats_info_read("/tmp/threshold_breach_count_phy" + j);
ulog_info(`[wlan%d] Allowed consecutive Channel Utilization threshold breach count = %d \n`, j, config.consecutive_threshold_breach);
if (!current_threshold_breach_count || current_threshold_breach_count == null || current_threshold_breach_count == 'NaN') {
// /tmp/phyX_breachcount file doesn't exist yet or has invalid value
current_threshold_breach_count = 0;
}
ulog_info(`[wlan%d] Previous consecutive Channel Utilization threshold breach count = %d \n`, j, current_threshold_breach_count);
// channel util at this channel (auto/fixed)
chan_util_value[j] = get_chan_util(j, sleep_time);
ulog_info(`[wlan%d] Allowed Channel Utilization threshold = %d \n`, j, config.threshold, current_channel[j]);
ulog_info(`[wlan%d] Current Channel Utilization (Channel %d at %d) = %d \n`, j, current_channel[j], time(), chan_util_value[j]);
if (chan_util_value[j] >= config.threshold) {
check_all_chan_util++;
// Channel Utilization threshold exceeded, increase breach count
current_threshold_breach_count++;
threshold_breach_count[j] = current_threshold_breach_count;
ulog_info(`[wlan%d] New consecutive Channel Utilization threshold breach count = %d \n`, j, threshold_breach_count[j]);
if (threshold_breach_count[j] >= config.consecutive_threshold_breach) {
// threshold breach flag up!
threshold_breach_f[j] = 1;
// get index of iface which exceeded the threshold breach count
check_threshold_breach_idx[j] = j;
check_all_threshold_breach++;
}
} else {
// reset the threshold breach count
ulog_info(`[wlan%d] Current Channel Utilization (%d) < Allowed Channel Utilization threshold (%d) \n`, j, chan_util_value[j], config.threshold);
ulog_info(`[wlan%d] Reset consecutive Channel Utilization threshold breach count \n`, j);
threshold_breach_count[j] = 0;
// threshold breach flag down!
threshold_breach_f[j] = 0;
}
update_breach_count(j, threshold_breach_count[j]);
} else {
check_all_cool_down++;
}
} else {
ulog_info(`[wlan%d] Interface not UP, will be checked in the next interval \n`, j);
}
}
for (let l = 0; l < num_radios; l++) {
if (current_rf_down[l] == 0) {
cool_down_f[l] = cool_down_check(l, cool_down_period);
if (cool_down_f[l] != 1) {
// start algo only if threshold breach count, and chan util threshold exceeded from configured values
if (threshold_breach_f[l] == 1 && chan_util_value[l] >= config.threshold) {
ulog_info(`[wlan%d] Consecutive Channel Utilization threshold breached = %d; %s Algorithm STARTS \n`, l, threshold_breach_count[l], selected_algo);
if (selected_algo == "RCS") {
// no. of channel utils to be compared
let max_chan = 2;
let curr_chan_list = {};
let chan_util_list = {};
let test_payload = {};
let final_payload = {};
let long_cac_time = 0;
bssid_mac[l] = stats_info_read("/sys/class/ieee80211/phy" + l + "/addresses");
sleep_time = 3000;
ulog_info(`[wlan%d] Total of %d channel utils will be compared \n `, l, max_chan);
/* Collect the chan util info of #max_chan channels*/
for (let num_chan = 0; num_chan < max_chan; num_chan++) {
ulog_info(`[wlan%d] Channel utilization check ROUND#%d \n`, l, num_chan);
if (num_chan == 0) {
curr_chan_list[num_chan] = current_channel[l];
chan_util_list[num_chan] = chan_util_value[l];
ulog_info(`[wlan%d] Current channel %d has Channel utilization = %d \n`, l, curr_chan_list[num_chan], chan_util_list[num_chan]);
} else {
// flag to assign max chan util value
let assign_max_chan_util = 0;
// call RCS for multiple random chan
let chan_scan = algo_rcs(l, curr_chan_list[num_chan-1], radio_band[l], htmode[l], selected_channels[l]);
curr_chan_list[num_chan] = stats_info_read("/tmp/phy" + l + "_rrmchan");
if (chan_scan == 1) {
// assign channel from RCS to interface
test_payload = {
action: 'chan_switch',
bssid: bssid_mac[l],
channel: curr_chan_list[num_chan],
phy: l,
band: radio_band[l],
htmode: htmode[l],
};
if (l == radio_5G_index) {
dfs_enabled_5g[radio_5G_index] = dfs_chan_check(radio_5G_index, test_payload.channel);
}
ulog_info(`[wlan%d] Initiated channel switch to random channel %d for comparing Channel utilization \n`, l, test_payload.channel);
let test_switch_status = rrmd_switch_channel(test_payload);
if (test_switch_status != 0) {
let actual_channel = switch_status_check(l, radio_5G_index, dfs_enabled_5g[radio_5G_index]);
if (actual_channel == test_payload.channel) {
ulog_info(`[wlan%d] Channel Switch success; Checking Channel utilization ... \n`, l);
// get chan util for current assigned random channel
chan_util_list[num_chan] = get_chan_util(l, sleep_time);
} else {
if (dfs_enabled_5g[radio_5G_index] == 1 && interface_status_check(l) == 1) {
// dfs channel not up yet
ulog_info(`[wlan%d] DFS channel %d taking too long to be UP. Interface status/Channel utilization will be checked in the next interval\n`, l, test_payload.channel);
// jump back to original channel
long_cac_time = 1;
break;
}
assign_max_chan_util = 1;
}
} else {
assign_max_chan_util = 1;
}
} else {
// RCS failed
assign_max_chan_util = 1;
}
if (assign_max_chan_util == 1) {
ulog_info(`[wlan%d] Channel switch fail; assign Channel utilization = 100 \n`, l);
// assign highest util value for invalid channel
chan_util_list[num_chan] = 100;
}
ulog_info(`[wlan%d] Channel utilization of random channel#%d (%s) = %d \n`, l, num_chan, curr_chan_list[num_chan], chan_util_list[num_chan] );
}
}
/* Switch to the channel with the lowest chan util; if long_cac_time flag is up then switch back to the previous channel */
if (long_cac_time != 1) {
ulog_info(`[wlan%d] Channel utilization of all %d channels checked \n`, l, max_chan);
// find the minimum chan util and select that as the next channel
let min_util = chan_util_list[0];
let index_min_util = 0;
for (let x = 0; x < max_chan; x++) {
ulog_info(`[wlan%d] Channel#%d = %s; Channel utilization#%d = %d \n`, l, x, curr_chan_list[x], x, chan_util_list[x]);
if (chan_util_list[x] < min_util) {
min_util = chan_util_list[x];
index_min_util = x;
}
}
ulog_info(`[wlan%d] Channel %d has the least Channel utilization of %d; switching to this channel \n`, l, curr_chan_list[index_min_util], min_util );
let _current_channel = check_current_channel(l);
if (_current_channel != curr_chan_list[index_min_util]) {
// switch channel to min_util
final_payload = {
action: 'chan_switch',
bssid: bssid_mac[l],
channel: curr_chan_list[index_min_util],
phy: l,
band: radio_band[l],
htmode: htmode[l],
};
if (l == radio_5G_index) {
dfs_enabled_5g[radio_5G_index] = dfs_chan_check(radio_5G_index, final_payload.channel);
}
if (final_payload.channel != curr_chan_list[max_chan-1] || min_util != chan_util_list[max_chan-1]) {
ulog_info(`[wlan%d] Initiated final channel switch to Channel %d \n`, l, final_payload.channel);
let final_switch_status = rrmd_switch_channel(final_payload);
if (final_switch_status != 0) {
let final_channel = switch_status_check(l, radio_5G_index, dfs_enabled_5g[radio_5G_index]);
if (final_channel == final_payload.channel) {
ulog_info(`[wlan%d] Final channel switch success \n`, l);
} else {
ulog_info(`[wlan%d] RCS algo fail (final channel switch failure), wait until next interval to retry\n`, l);
}
} else {
ulog_info(`[wlan%d] RCS algo fail (final channel switch failure at hostapd_cli), wait until next interval to retry\n`, l);
}
} else {
ulog_info(`[wlan%d] Channel switch not necessary, current channel %d has the least channel utilization value \n`, l, final_payload.channel);
// reset breach count
update_breach_count(l, 0);
}
} else {
ulog_info(`[wlan%d] Channel switch not necessary, current channel %d is already assigned to the interface \n`, l, _current_channel);
// reset breach count
update_breach_count(l, 0);
}
} else {
// revert back to the original channel
ulog_info(`[wlan%d] Channel %d has a cac_time longer than 60 seconds, RRM failed for this interval (you might want to avoid selecting this channel) \n`, l, test_payload.channel);
}
} else if (selected_algo == "ACS") {
let random_wait_time = random_time_calc();
/*
check_all_chan_util == num_radios: chan util threshold exceeded for all interfaces
check_all_chan_util >= 1: chan util threshold exceeded for one or more interfaces
check_all_cool_down == 0: cool down time for all interfaces is over
check_all_cool_down < num_radios: cool down time has passed for one or more interfaces
check_all_threshold_breach == num_radios: threshold breach count exceeded for all interfaces
check_all_threshold_breach >= 1: threshold breach count exceeded for one or more interfaces
*/
// flag to check if 5G radio was restarted
let radio_5g_restarted = 0;
if (check_all_chan_util == num_radios && check_all_cool_down == 0 && check_all_threshold_breach == num_radios) {
// Channel util high for all interfaces && cool down period over && threshold breach count exceeded for all interfaces: restart all interfaces
for (let m = 0; m < num_radios; m++) {
fixed_channel_algo(m, fixed_channel_f[m], auto_channel_f[m], fixed_chan_bkp[m], channel_config[m]);
}
ulog_info(`[all wlan interfaces] Initiating channel switch in %d seconds ... \n`, random_wait_time);
sleep(random_wait_time*1000);
ulog_info(`[all wlan interfaces] %s Algorithm will start; Turning DOWN/UP \n`, selected_algo);
// 5G radio was restarted
radio_5g_restarted = 1;
for (let x = 0; x < num_radios; x++) {
ulog_info(`[wlan%d] Channel will be switched \n`, x);
// timestamp for all interfaces must be saved
update_channel_switch_time(x);
// reset breach count back to 0 as we are calling the channel selection algo
update_breach_count(x, 0);
}
// restart all wlan interfaces
system(`wifi down`);
system(`wifi up`);
} else if (check_all_chan_util >= 1 && check_all_cool_down < num_radios && check_all_threshold_breach >= 1) {
// Channel util high for one or more interfaces && cool down period over for one or more interfaces && threshold breach count exceeded for one or more interface: restart that interface
for (let high_util_iface in check_threshold_breach_idx) {
fixed_channel_algo(high_util_iface, fixed_channel_f[high_util_iface], auto_channel_f[high_util_iface], fixed_chan_bkp[high_util_iface], channel_config[high_util_iface]);
ulog_info(`[wlan%d] Initiating channel switch in %d seconds ... \n`, high_util_iface, random_wait_time);
sleep(random_wait_time*1000);
ulog_info(`[wlan%d] %s Algorithm will start; Turning DOWN/UP \n`, high_util_iface, selected_algo);
ulog_info(`[wlan%d] Channel will be switched \n`, high_util_iface);
// timestamp for wlanX interfaces must be saved
update_channel_switch_time(high_util_iface);
// reset breach count back to 0 as we are calling the channel selection algo
update_breach_count(high_util_iface, 0);
if (high_util_iface == radio_5G_index) {
radio_5g_restarted = 1;
}
// wifi down radioX
system(`wifi down radio${high_util_iface}`);
// wifi up radioX
system(`wifi up radio${high_util_iface}`);
}
}
// need to wait for radio 5GHz interface, when it is DFS enabled && restarted
if (radio_5g_restarted == 1 && dfs_enabled_5g[radio_5G_index] == 1) {
ulog_info(`[wlan%d] 5G radio might need some time to be UP (DFS enabled) ... wait for 30 seconds \n`, radio_5G_index);
// 30 sec delay for DFS scan to come finish
sleep(30000);
}
}
} else {
if (threshold_breach_f[l] != 1) {
ulog_info(`[wlan%d] Threshold breach count (=%d) < Allowed consecutive Channel Utilization threshold breach count (=%d), will be checked again in the next interval \n`, l, threshold_breach_count[l], config.consecutive_threshold_breach);
} else {
ulog_info(`[wlan%d] Channel utilization (=%d) within threshold (=%d), will be checked again in the next interval \n`, l, chan_util_value[l], config.threshold);
}
}
} else {
ulog_info(`[wlan%d] Need to cool down (%d seconds hasn't passed); will be checked again in the next interval \n`, l, cool_down_period/1000);
}
}
}
ulog_info(`Interference detection finish; next RRM round starts in %d seconds \n`, config.interval/1000);
return config.interval;
}
return {
init: function(data) {
ulog_info('Policy - Channel utilization \n');
/* load config and override defaults if they were set in UCI */
for (let key in config)
if (data[key])
config[key] = +data[key];
uloop_timeout(channel_optimize, 20000);
},
};

View File

@@ -96,7 +96,13 @@
},
"rrm": {
"beacon-request-assoc": true,
"station-stats-interval": 30
"station-stats-interval": 30,
"chanutil": {
"algo": "rcs",
"consecutive-threshold-breach": 2,
"interval": 240,
"threshold": 50
}
}
}
}