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AP: Add support for BSS load element (STA Count, Channel Utilization)

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The new "bss_load_update_period" parameter can be used to configure
hostapd to advertise its BSS Load element in Beacon and Probe Response
frames. This parameter is in the units of BUs (Beacon Units).

When enabled, the STA Count and the Channel Utilization value will be
updated periodically in the BSS Load element. The AAC is set to 0 sinze
explicit admission control is not supported. Channel Utilization is
calculated based on the channel survey information from the driver and
as such, requires a driver that supports providing that information for
the current operating channel.

Signed-off-by: Kyeyoon Park <kyeyoonp@qca.qualcomm.com>
This commit is contained in:
Kyeyoon Park 2014-10-15 16:36:04 -07:00 • committed by Jouni Malinen
parent 8a5cc2fe38
commit ec8f36afca
13 changed files with 171 additions and 2 deletions
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8
src/ap/hostapd.h
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@ -218,6 +218,9 @@ struct hostapd_data {
unsigned int cs_c_off_proberesp;
int csa_in_progress;
/* BSS Load */
unsigned int bss_load_update_timeout;
#ifdef CONFIG_P2P
struct p2p_data *p2p;
struct p2p_group *p2p_group;
@ -354,6 +357,11 @@ struct hostapd_iface {
/* lowest observed noise floor in dBm */
s8 lowest_nf;
/* channel utilization calculation */
u64 last_channel_time;
u64 last_channel_time_busy;
u8 channel_utilization;
unsigned int dfs_cac_ms;
struct os_reltime dfs_cac_start;