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Wireless 4K Streaming

PAR
Beginner
Beginner

Hi,

 

This is just a general query about wireless capacity. Traditionally we have used the 30 users per AP model for capacity, however, if you have a customer who has a requirement that the wireless infrastructure must support 4K video streaming is there a general rule for how many users per AP?

 

Thanks for any advice, much appreciated.

11 Replies 11

Scott Fella
Hall of Fame Guru Hall of Fame Guru
Hall of Fame Guru

Users per ap varies and you would need to really test to see how many devices can provide good 4k.  Also note is there is any compression or transcoding that is done prior or not.  Can't really tell you what to go with as I haven't really seen post in regards to this and or testing.  

-Scott
*** Please rate helpful posts ***

You might want to reference this Meraki guide also.  Should help, since it has calculations.

High Density Wi-Fi Deployments - Cisco Meraki

-Scott
*** Please rate helpful posts ***

PAR
Beginner
Beginner

Thanks Scott, I'll take a look.

saravlak
Beginner
Beginner

There're many factors to account for, following doc is old but most of the principles do apply.

 

Cisco Unified Wireless Network Solution: VideoStream Deployment Guide
https://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/8-1/VideoStream/b_Cisco_Unified_Wireless_Network_Solution_VideoStream_Deployment_Guide.html

 

Wireless High Client Density Design Guide
https://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/8-7/b_wireless_high_client_density_design_guide.html

PAR
Beginner
Beginner

Thanks Saraviak, I'm trying to work through an example: -

 

If you had 150 users in a building and they all wanted to do 4K video streaming (assume 15-18Mbps), at the same time, how many access points would be required? And how would this change between clients who support 2 spatial streams and connect via Wifi 5 or Wifi 6?

 

I believe Wifi 6 can support 8 clients simultaneously, whereas Wifi 5 its only 1, which would have an impact on the backbone connections, MultiGig ports for Wifi 6 access points.

 

Appreciate the support. 

to start with, Try test with one AP and 15 clients.

 

Rough estimate only:
WiFi 6 APs. 10+ APs ==> depends upon the environment/setup/config.
Use Videostream feature.
40mhz, 5ghz only wlan, lower data rates disabled.
connecting datarate, SnR and RF Bandwidth availability matters.
less likely to throttle AP's wired port.

Thanks, appreciate the response.

 

I was mainly looking at the planning process as opposed to the actual configuration side. 

 

Before we get the config side if a customer says I want to support these 150 users 4K streaming, what is the maths you would give them to say "Mr Customer you need x access points based on these figures".

4.4 Video Performance

https://miercom.com/pdf/reports/DR201007G.pdf

 

it depends on so many factors, i'd tell cust that it takes 10+/X APs as min.

I was just about to post the link to that Miercom report but you got there first lol

___________________________________________
TAC recommended codes for AireOS WLC's
Best Practices for AireOS WLC's
TAC recommended codes for 9800 WLC's
Best Practices for 9800 WLC's
Cisco Wireless compatibility matrix
Field Notice: FN-72424 Later Versions of WiFi 6 APs Fail to Join WLC - Software Upgrade Recommended
WARNING - see CSCwd37092 Throughput degraded after upgrading to code 8.10.181.0/17.3.6 - 2800/3800/4800 series
- The fix for CSCwd37092 is now released in 8.10.183.0 and
- For IOS-XE 17.3.6 select controller model, go to IOS XE Software AP Service Pack, select CSCwd40096 17.3.6 APSP2
Field Notice: FN-63942 Lightweight APs and WLCs Fail to Create CAPWAP Connections Due to Certificate
                      Expiration - Software Upgrade Recommended
Field Notice: FN-72524 - During Software Upgrade/Downgrade IOS APs Might Remain in Downloading State
                     After 4 Dec 2022 Due to Certificate Expiration - Fixed in 8.10.183.0 and 17.3.6 APSP5 (APSP_CSCwd83653)
                     Also fixed in 8.5.182.7 (8.5 mainline) and 8.5.182.105 (8.5 IRCM) if you can't upgrade to 8.10
                     Note that 8.10.181.0 and 8.10.182.0 have been deferred (withdrawn) and are effectively unsupported by Cisco
___________________________________________
Richard R

Lol

Cheers guys I'll take a look at the report.

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