CTS 218: 6GHz PSD & AFC with Chuck Lukaszewski Clear To Send: Wireless Network Engineering
-
- Tech News
In this episode, we have Chuck Lukaszewski, VP of Wireless Strategy & Standards for HPE, to talk about two technical aspects of 6GHz:
* Power Spectral Density (PSD)* Automated Frequency Coordination (AFC)
On top of explaining these technical concepts, Chuck gives tones of useful information on 6GHz regulations for both the US and Europe.
Podcast Content
6GHz Status
* Quick recap of the status* Draft and Order outcome
Power Spectral Density (PSD
* Power Spectral Density* What is PSD: It tells us how the power is distributed in frequency (dbm/MHz)* Why did we decided to change the way we regulate transmission power in 6Ghz (EIRP vs PSD)* Be able to use wider channel without lowering the SNR* How does it work in practise – The math behind it* Europe will not use PSD (23 or 24dBm EIRP for LPI)* SNR issue for larger channels* Also less channels* Allow the portable devices at 14dBm EIRP from the very beginning
Automated Frequency Coordination
* Automated Frequency Coordination* What is AFC: * Use of a spectrum database (ULS)* Incumbent locations (big dishes)* Figure the pattern of that transmitter* Where it is in space* Frequencies available at this locations* AFC Operators will manage the spectrum database* Why do we need it for some communications on 6GHz* Used for outdoor communications or indoor high power communications* Explain how it is different from DFS* AFC is a preemptive protocol* Every 24h it has to check* How does it work?* AFC returns the list of available frequencies and the max power to use* APs will have GPS inside to report location* AP manager needs to know where the APs are* Campus AP* You are already connected to internet* Securely via secured protocols* Point-to-Point* Initial operations in 5GHz to contact the database* AFC equipment will not be available at day 1* The process is not defined yet for the incumbents* Some more testings have to be done* AFC is only enable in 2 UNII bands* UNII-5 & UNII-7* No outdoor operations on 6GHz in Europe* Most European countries do not publish their licence use.* No data base in European so no AFC possible in Europe* Maybe: Light licensing type of model will be used* AFC to comply with international rules for Canada and Mexico* Probably follow the FCC after April 23rd
Links & Resources
* FCC Document: 6GHz Report and Order and Further Notice of Proposed Rulemaking* All FCC documents related to 6GHz: https://www.fcc.gov/ecfs/search/filings?proceedings_name=18-295&sort=date_disseminated,DESC* Chuck’s Aruba Blog Articles on 6GHz:* https://blogs.arubanetworks.com/spectrum/fccs-6-ghz-move-will-push-usa-ahead-of-the-world-in-wireless/* https://blogs.arubanetworks.com/spectrum/the-6-ghz-band-say-goodbye-to-the-stone-age-of-wi-fi/* HPE 6GHz Roundtable with Chuck Lukaszewski and other influencers: https://www.dropbox.com/s/45w0gklv58ic7vi/6GHzRoundtable1_edited_14202004.mp4?dl=0* WirelessLAN Pros Podcast Episode 194: Who’s Ready for 6GHz?
In this episode, we have Chuck Lukaszewski, VP of Wireless Strategy & Standards for HPE, to talk about two technical aspects of 6GHz:
* Power Spectral Density (PSD)* Automated Frequency Coordination (AFC)
On top of explaining these technical concepts, Chuck gives tones of useful information on 6GHz regulations for both the US and Europe.
Podcast Content
6GHz Status
* Quick recap of the status* Draft and Order outcome
Power Spectral Density (PSD
* Power Spectral Density* What is PSD: It tells us how the power is distributed in frequency (dbm/MHz)* Why did we decided to change the way we regulate transmission power in 6Ghz (EIRP vs PSD)* Be able to use wider channel without lowering the SNR* How does it work in practise – The math behind it* Europe will not use PSD (23 or 24dBm EIRP for LPI)* SNR issue for larger channels* Also less channels* Allow the portable devices at 14dBm EIRP from the very beginning
Automated Frequency Coordination
* Automated Frequency Coordination* What is AFC: * Use of a spectrum database (ULS)* Incumbent locations (big dishes)* Figure the pattern of that transmitter* Where it is in space* Frequencies available at this locations* AFC Operators will manage the spectrum database* Why do we need it for some communications on 6GHz* Used for outdoor communications or indoor high power communications* Explain how it is different from DFS* AFC is a preemptive protocol* Every 24h it has to check* How does it work?* AFC returns the list of available frequencies and the max power to use* APs will have GPS inside to report location* AP manager needs to know where the APs are* Campus AP* You are already connected to internet* Securely via secured protocols* Point-to-Point* Initial operations in 5GHz to contact the database* AFC equipment will not be available at day 1* The process is not defined yet for the incumbents* Some more testings have to be done* AFC is only enable in 2 UNII bands* UNII-5 & UNII-7* No outdoor operations on 6GHz in Europe* Most European countries do not publish their licence use.* No data base in European so no AFC possible in Europe* Maybe: Light licensing type of model will be used* AFC to comply with international rules for Canada and Mexico* Probably follow the FCC after April 23rd
Links & Resources
* FCC Document: 6GHz Report and Order and Further Notice of Proposed Rulemaking* All FCC documents related to 6GHz: https://www.fcc.gov/ecfs/search/filings?proceedings_name=18-295&sort=date_disseminated,DESC* Chuck’s Aruba Blog Articles on 6GHz:* https://blogs.arubanetworks.com/spectrum/fccs-6-ghz-move-will-push-usa-ahead-of-the-world-in-wireless/* https://blogs.arubanetworks.com/spectrum/the-6-ghz-band-say-goodbye-to-the-stone-age-of-wi-fi/* HPE 6GHz Roundtable with Chuck Lukaszewski and other influencers: https://www.dropbox.com/s/45w0gklv58ic7vi/6GHzRoundtable1_edited_14202004.mp4?dl=0* WirelessLAN Pros Podcast Episode 194: Who’s Ready for 6GHz?