Multiple networking - Wifi, wireless and so on
I want to share my thoughts about wifi frequency planning etc when setting up wireless access on venues, related to the earlier discussions here and in the X32 thread.
As the x-family now officially evolves with more network based products i think it is necessary to share facts, information and experience to each eachother! Using wifi to run shows and mix remotely is wonderful, but some care must be taken into planning in my opinion in order to set up a robust and reliable network infrastructure with the highest possible availability.
Please add info and comment. Correct me if i have stated something wrong!
Cheers,
Jon
Frequency Spectrum
Some useful input and facts about the wifi standard can be found here
IEEE 802.11 - Wikipedia, the free encyclopedia
The 2.4 GHz ISM band is very crowded by:
- Wifi devices in 802.11 B/G mode - access points, mobile phones with internet sharing/tethering/personal hotspots.
- Bluetooth devices
- Wireless microphones - Line 6
- Other wireless products, remote controls etc that not use the 800 MHz band. One example is R/C aircrafts/Heli´s
- Electromagnetic Interference from Microwave owens
The relatively new 802.11 N-standard is using both the 2.4 and 5 GHz band. Some devices can be run exclusively in 5 GHz mode which for now is less crowded.
It provides higher data rates (due to wider bandwith/channels).
Range and penetration in buildings is less than the B/G standard, but can be handled with external antennas.
For more information on the N-standard, see
IEEE 802.11n-2009 - Wikipedia, the free encyclopedia
This facts conclude that:
2.4GHz:
+ compatible with almost everything
+ goes through walls better than 5GHz
- fewer non-overlapping channels
- more likely to be congested
5GHz:
+ more non-overlapping channels
+ less likely to be congested
+ usually faster than 2.4GHz
- more likely to be blocked by walls
- fewer compatible devices
-the 5 GHz band should be preferred for a FoH wireless network to avoid interference with potential hostile emitters on 2.4 GHz.
-not all devices can use the N-mode in 5GHz only. This applies to older computers, iPads and iPhones.
Setup and devices
To control your x-device you will need:
- x-device (x32 or siblings)
- wifi router that will host the network. This can also be done by a computer if you always carry it.
- an ethernet cat-5 cable connected between the LAN (not WAN) port in the router and the x-device
- an optional external Wifi antenna in order to increase coverage and range.
To access the x-device you will need:
- computer with a)windows running x-control, b) Mac OS running x-control in WINE, c) Linux running x-control in WINE
- ipad running Xicontrol and/or XiQ
- iphone running XiQ
Note that you´ll need to check your devices compability if you plan to use wifi in 5GHz exclusive mode. Not all routers, computers and models of Apple iPhones can use 5 GHz. Currently the iPhone 5 is the only iPhone that supports 5 GHz. This has to be adressed if you plan to use XiQ for personal monitoring control on 5 GHz. See
Apple - iPhone 5 - Compare specifications between iPhone models.
Spectrum Planning
In order to avoid interference on location, understanding of spectrum planning is recommended. The wikipedia articles above gives some information about channels etc.
It is recommended to perform a survey or at least a check when setting up the gear.
I use the app Wifi explorer on Mac OS X to survey the spectrum.
WiFi Explorer for Mac OS X.
If you plan to use x-device control over wifi in conjunction with other 2.4 GHz non 802.11 devices as wireless mic´s (Line6), wireless DMX etc, it is extremely important to survey and plan the spectrum. Line 6 has lots of documentation and thread´s in their support forum
Community: Space: XD-V Digital Wireless Microphones. There is a whitepaper from Line6 describing their technology and compatibility with wifi.
Select Wifi cannel (s) according to available spectrum and co-ordinate with other wireless systems (mic´s and DMX)
Selecting Router and network components:
- Choose a router that fulfil requirements of desired band configuration.
- Consider router that can host multible bands in parallel on separate SSID´s, in eg 2.4 GHz for monitor control iphones (XiQ) and a separate network for FoH ipad remote on 5 GHz. Apple Airport extreme will do this.
- Consider semi pro access point with high output for critical applications. I have read good reports on these
Unifi | Ubiquiti Networks, Inc.
- If internet access is needed, pre or post show (shut down during show) consider router with 3G/4G access. I use the Dovado TINY.
Setting up your network/router:
- Locate with care to cater for unobstructed radio path. Use external antenna if needed.
- Power the router on UPS if available
- select wifi/radio mode (B/G/N) and band (2.4/5/or mixed) according to planned client/handheld usage.
- setup parallell networks for FoH (5 gig) and Monitor app (2.4 gig) with separate SSID´s
- setup the strongest network encryption. WPA-2 is desired.
- HIDE the Broadcast of your SSID. You do not want the audience 10- 100- or 1000s of iPhones or Androids automatically try connect to your network. Keep your FoH SSID and password as a secret. Change the
- connect FoH computer with ethernet cable if possible. Disable wifi in order not to crowd it.
- Setup router network. Most routers use the sub network 192.168.0. with the following parameters
- -The Router adress 192.168.0.1
- -The network mask 255.255.255.0 (gives space for 254 devices in the sub network)
- -DHCP enabled. Provides dynamic IP adresses to connected devices
If you plan to use many devices it is recommended to plan your address space between static and dynamic.
One example:
192.168.1.1 - Router
192.168.1.11 - X-device 1 (X32 FoH)
192.168.1.12 - Computer FoH
.
.
192.168.1.21 - X-device 2 (x32 C Monitor)
192.168.1.22 - Computer Monitor
.
.
and so on for speaker processor management, wireless mic management that you not will change on a regular basis.
192.168.1.101 - - 199 wireless or wired DHCP range. Set this in the router DHCP config.
i-device setup
- disable Bluetooth on ipad/iphone to increase connectivity
- connect to the desired network by typing in the SSID. if you see your SSID, turn it off in the router.
- disable automatic connection to known networks in order to avoid connection/switch to nearby earlier used networks or public networks/hotspots.
- configure screen lock as desired. For now i am not sure that xicontrol/xiq prevents screen lock. you do not want to type in passcode in a hurry when you want to lower a feedbacking monitor...
- consider to setup use of notification centre in a restrictive way in order not to disturb you with notifications/alarms etc
Setup Xicontrol:
- Enter X-console IP adress (for example 192.168.1.11)
- Setup mini meters and mini faders according to ipad performance
Showtime:
- reset ipad / power cycle. Kill apps that is not used. (double click on home button, taskbar appears, tap and hold on a app to enter kill mode)
- set ipad and phone into FLIGHT MODE. No calls or emails wanted.
- then re enable WIFI
- unplug internet connection from router (WAN cable and/or USB 3G/4G adapter)
- disable alarms and calendar notifications.