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6 GHz: Change 6 GHz channels per IEEE P802.11ax/D6.1

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The channel numbering/center frequencies was changed in IEEE
P802.11ax/D6.1. The center frequencies of the channels were shifted by
10 MHz. Also, a new operating class 136 was defined with a single
channel 2. Add required support to change the channelization as per IEEE
P802.11ax/D6.1.

Signed-off-by: Wu Gao<wugao@codeaurora.org>
Signed-off-by: Vamsi Krishna <vamsin@codeaurora.org>
This commit is contained in:
Wu Gao 2020-06-08 14:27:12 +08:00 committed by Jouni Malinen
parent 5908fedc10
commit 52a3257621
3 changed files with 34 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
hostapd/hostapd.conf
View File

@ -210,7 +210,7 @@ channel=1
# Frequency list can be provided as range using hyphen ('-') or individual
# frequencies can be specified by comma (',') separated values
# Default: all frequencies allowed in selected hw_mode
#freqlist=2437,5945,5965
#freqlist=2437,5955,5975
#freqlist=2437,5985-6105
# Exclude DFS channels from ACS
@ -822,11 +822,11 @@ wmm_ac_vo_acm=0
#he_rts_threshold=0
# HE operating channel information; see matching vht_* parameters for details.
# On the 6 GHz band the center freq calculation starts from 5.940 GHz offset.
# For example idx=3 would result in 5955 MHz center frequency. In addition,
# On the 6 GHz band the center freq calculation starts from 5.950 GHz offset.
# For example idx=3 would result in 5965 MHz center frequency. In addition,
# he_oper_chwidth is ignored, and the channel width is derived from the
# configured operating class or center frequency indexes (see
# IEEE P802.11ax/D4.3 Annex E, Table E-4).
# IEEE P802.11ax/D6.1 Annex E, Table E-4).
#he_oper_chwidth
#he_oper_centr_freq_seg0_idx
#he_oper_centr_freq_seg1_idx

37
src/common/ieee802_11_common.c
View File

@ -1029,9 +1029,9 @@ enum hostapd_hw_mode ieee80211_freq_to_channel_ext(unsigned int freq,
return HOSTAPD_MODE_IEEE80211A;
}
if (freq > 5940 && freq <= 7105) {
if (freq > 5950 && freq <= 7115) {
int bw;
u8 idx = (freq - 5940) / 5;
u8 idx = (freq - 5950) / 5;
bw = center_idx_to_bw_6ghz(idx);
if (bw < 0)
@ -1042,6 +1042,12 @@ enum hostapd_hw_mode ieee80211_freq_to_channel_ext(unsigned int freq,
return HOSTAPD_MODE_IEEE80211A;
}
if (freq == 5935) {
*op_class = 136;
*channel = (freq - 5925) / 5;
return HOSTAPD_MODE_IEEE80211A;
}
/* 56.16 GHz, channel 1..6 */
if (freq >= 56160 + 2160 * 1 && freq <= 56160 + 2160 * 6) {
if (sec_channel)
@ -1418,7 +1424,11 @@ static int ieee80211_chan_to_freq_global(u8 op_class, u8 chan)
case 135: /* UHB channels, 80+80 MHz: 7, 23, 39.. */
if (chan < 1 || chan > 233)
return -1;
return 5940 + chan * 5;
return 5950 + chan * 5;
case 136: /* UHB channels, 20 MHz: 2 */
if (chan == 2)
return 5935;
return -1;
case 180: /* 60 GHz band, channels 1..8 */
if (chan < 1 || chan > 8)
return -1;
@ -2208,10 +2218,13 @@ int center_idx_to_bw_6ghz(u8 idx)
int is_6ghz_freq(int freq)
{
if (freq < 5940 || freq > 7105)
if (freq < 5935 || freq > 7115)
return 0;
if (center_idx_to_bw_6ghz((freq - 5940) / 5) < 0)
if (freq == 5935)
return 1;
if (center_idx_to_bw_6ghz((freq - 5950) / 5) < 0)
return 0;
return 1;
@ -2220,7 +2233,7 @@ int is_6ghz_freq(int freq)
int is_6ghz_op_class(u8 op_class)
{
return op_class >= 131 && op_class <= 135;
return op_class >= 131 && op_class <= 136;
}
@ -2228,14 +2241,14 @@ int is_6ghz_psc_frequency(int freq)
{
int i;
if (!is_6ghz_freq(freq))
if (!is_6ghz_freq(freq) || freq == 5935)
return 0;
if ((((freq - 5940) / 5) & 0x3) != 0x1)
if ((((freq - 5950) / 5) & 0x3) != 0x1)
return 0;
i = (freq - 5940 + 55) % 80;
i = (freq - 5950 + 55) % 80;
if (i == 0)
i = (freq - 5940 + 55) / 80;
i = (freq - 5950 + 55) / 80;
if (i >= 1 && i <= 15)
return 1;
@ -2471,6 +2484,8 @@ int op_class_to_bandwidth(u8 op_class)
case 134: /* UHB channels, 160 MHz: 15, 47, 79.. */
case 135: /* UHB channels, 80+80 MHz: 7, 23, 39.. */
return 160;
case 136: /* UHB channels, 20 MHz: 2 */
return 20;
case 180: /* 60 GHz band, channels 1..8 */
return 2160;
case 181: /* 60 GHz band, EDMG CB2, channels 9..15 */
@ -2531,6 +2546,8 @@ int op_class_to_ch_width(u8 op_class)
return CHANWIDTH_160MHZ;
case 135: /* UHB channels, 80+80 MHz: 7, 23, 39.. */
return CHANWIDTH_80P80MHZ;
case 136: /* UHB channels, 20 MHz: 2 */
return CHANWIDTH_USE_HT;
case 180: /* 60 GHz band, channels 1..8 */
return CHANWIDTH_2160MHZ;
case 181: /* 60 GHz band, EDMG CB2, channels 9..15 */

6
wpa_supplicant/op_classes.c
View File

@ -22,13 +22,13 @@ static enum chan_allowed allow_channel(struct hostapd_hw_modes *mode,
unsigned int *flags)
{
int i;
int is_6ghz = op_class >= 131 && op_class <= 135;
int is_6ghz = op_class >= 131 && op_class <= 136;
for (i = 0; i < mode->num_channels; i++) {
int chan_is_6ghz;
chan_is_6ghz = mode->channels[i].freq > 5940 &&
mode->channels[i].freq <= 7105;
chan_is_6ghz = mode->channels[i].freq >= 5935 &&
mode->channels[i].freq <= 7115;
if (is_6ghz == chan_is_6ghz && mode->channels[i].chan == chan)
break;
}