Passengers bring media content on personal portable devices onto airplane, and it is desirable to “cast” the media onto seat back displays in an aircraft cabin. Considering that 2.4 & 5 GHz Wi-Fi on the airplane is congested, it is desirable to leverage an alternate technology that is/will be supported in commercial, off the shelf portable devices.
Desired features of the solution:
- High resolution (4K) video bandwidth
- 400+ passenger devices in an aircraft cabin
- No interference between devices of passengers in close proximity
- Video Casting or Screen Mirroring Options
The IEEE 802.11ad Standard 60GHz Wi-Fi or WiGig:
- It uses the millimeter wave frequency. Hence the range of WiGig communication is limited (a few meters and barely passes through solids)
- The high frequency allows more bandwidth => very high data rates
- The IEEE 802.11ad standard has virtual antenna sectors that discretize the antenna azimuth.
- WiGig is Highly directional which drastically reduces interference outside of the beam direction.
- The low range, high data rate fits well with the desired features of the solution
The IEEE 802.11ax – Wi-Fi 6 and Wi-Fi 6E
- 2.4GHz, 5GHz, and 6GHz (5925-7125MHz) bands are available
- Maximum theoretical speed of Wi-Fi 6E:
- mobile phone chip 3.6Gbps
- router chip 5.4Gbps to 10.8Gbps
Simulation of WLAN propogations:
- Accurate link-level model to determine achievable rates for videocasting
- Accurate interference model
Casting Methods being tried out:
Commercially off the shelf devices must be capable of using our solution.
- By 2019, the flagship Asus phones have WiGig capability and the flagship phones of Samsung and Apple have been equipped with Wi-Fi 6
- Wi-Fi 6E chips supporting mobile phones is expected to be concentrated on the upcoming Qualcomm Snapdragon series
Some examples of the mobile devices in the market in 2020 are: