I'm using a few MacBooks and iPads connected to a router via WiFi. The problem is that a few minutes after they connect via WiFi the connection stops working. This happens on all devices. I went into the router settings by connecting via cable and everything seems in order.

Connecting a laptop via cable to the router I can use internet as normal, the problem is only with WiFi. What can be the problem here?

Here are the connected clients

    Connected Clients   
 MAC Address     Idle(s)     RSSI(dBm)   IP Addr     Host Name  Mode    Speed (kbps)
14:10:9F:F3:48:D6   1   -36 192.168.0.5 Jeans-Air   n   78000
14:99:E2:C6:41:10   1   -36 192.168.0.8 JeanGaleasiPad  n   24000

Here's the router event log

 Mon Dec 30 04:12:30 2013    Notice (6)      WiFi Interface [wl0] set to Channel 1 (Side-Band Channel:N/A)... 
 Mon Dec 30 04:12:25 2013    Notice (6)      WiFi Interface [wl0] set to Channel 1 (Side-Band Channel:5) -... 
 Mon Dec 30 02:17:56 2013    Notice (6)      WiFi Interface [wl0] set to Channel 40 (Side-Band Channel:36)... 
 Mon Dec 30 02:16:04 2013    Notice (6)      WiFi Interface [wl0] set to Channel 11 (Side-Band Channel:7) ... 
 Mon Dec 30 01:59:26 2013    Notice (6)      WiFi Interface [wl0] set to Channel 6 (Side-Band Channel:N/A)... 
 Mon Dec 30 01:59:22 2013    Notice (6)      WiFi Interface [wl0] set to Channel 6 (Side-Band Channel:2) -... 
 Sun Dec 29 23:27:51 2013    Notice (6)      WiFi Interface [wl0] set to Channel 1 (Side-Band Channel:N/A)... 
 Sun Dec 29 23:27:49 2013    Notice (6)      WiFi Interface [wl0] set to Channel 11 (Side-Band Channel:N/A... 
 Sun Dec 29 14:32:55 2013    Critical (3)    Started Unicast Maintenance Ranging - No Response received - ... 
 Sat Dec 28 13:08:19 2013    Error (4)   DHCP REBIND WARNING - Field invalid in response ;CM-MAC=1c:3e... 
 Fri Dec 27 18:10:19 2013    Critical (3)    Started Unicast Maintenance Ranging - No Response received - ... 
 Fri Dec 27 16:08:55 2013    Error (4)   Map Request Retry Timeout;CM-MAC=1c:3e:84:f1:6b:84;CMTS-MAC=0... 
 Thu Dec 26 21:08:53 2013    Notice (6)      WiFi Interface [wl0] set to Channel 11 (Side-Band Channel:7) ... 
 Thu Dec 26 20:43:50 2013    Notice (6)      WiFi Interface [wl0] set to Channel 11 (Side-Band Channel:N/A... 
 Tue Dec 24 12:45:03 2013    Critical (3)    Started Unicast Maintenance Ranging - No Response received - ... 
 Tue Dec 24 04:55:52 2013    Error (4)   Map Request Retry Timeout;CM-MAC=1c:3e:84:f1:6b:84;CMTS-MAC=0... 
 Mon Dec 23 12:32:00 2013    Notice (6)      TLV-11 - unrecognized OID;CM-MAC=1c:3e:84:f1:6b:84;CMTS-MAC=0... 
 Mon Dec 23 12:32:00 2013    Error (4)   Missing BP Configuration Setting TLV Type: 17.9;CM-MAC=1c:3e:... 
 Mon Dec 23 12:32:00 2013    Error (4)   Missing BP Configuration Setting TLV Type: 17.8;CM-MAC=1c:3e:... 
 Mon Dec 23 12:32:00 2013    Warning (5)     DHCP WARNING - Non-critical field invalid in response ;CM-MAC... 
 Mon Dec 23 18:32:02 2013    Notice (6)      Honoring MDD; IP provisioning mode = IPv4 
 Mon Dec 23 18:31:10 2013    Critical (3)    No Ranging Response received - T3 time-out;CM-MAC=1c:3e:84:f1... 
 Mon Dec 23 18:28:57 2013    Critical (3)    Received Response to Broadcast Maintenance Request, But no Un... 
 Mon Dec 23 18:28:25 2013    Critical (3)    Started Unicast Maintenance Ranging - No Response received - ... 
 Mon Dec 23 12:17:48 2013    Notice (6)      TLV-11 - unrecognized OID;CM-MAC=1c:3e:84:f1:6b:84;CMTS-MAC=0... 
 Mon Dec 23 12:17:48 2013    Error (4)   Missing BP Configuration Setting TLV Type: 17.9;CM-MAC=1c:3e:... 
 Mon Dec 23 12:17:48 2013    Error (4)   Missing BP Configuration Setting TLV Type: 17.8;CM-MAC=1c:3e:... 
 Mon Dec 23 12:17:48 2013    Warning (5)     DHCP WARNING - Non-critical field invalid in response ;CM-MAC... 
 Mon Dec 23 18:17:48 2013    Notice (6)      Honoring MDD; IP provisioning mode = IPv4 
 Mon Dec 23 18:16:58 2013    Critical (3)    No Ranging Response received - T3 time-out;CM-MAC=1c:3e:84:f1... 
 Mon Dec 23 18:16:15 2013    Critical (3)    Received Response to Broadcast Maintenance Request, But no Un... 
 Mon Dec 23 18:15:43 2013    Critical (3)    Started Unicast Maintenance Ranging - No Response received - ...