I have been trying to see if I could find online more information about the upcoming Netgear R7500. Luckily there was a Netgear digital home workshop event overseas and some folks attending posted information and photos here and here. The information on the R7500 is as follows based on the two postings (which have product photos btw):
Supports MAC Time Machine
Virtually the same casing design as the R7000, except with two antennas on the back, one antenna on the left and one antenna on the right side.
I wonder if we're going to have a 4x4 MU-MIMO PCI-E adapter for that. The only way to get the benefits of that WiFi is to have another one of them in bridge mode.
Having an adapter that supports MU-MIMO alone one should see an improvement. Yes to get the full performance possible one would want a 4T4R MU-MIMO adapter.
All I recall seeing beyond press releases and actually submitted to the FCC has been a 2x2 MU-MIMO for use in smartphones and tablets in the Qualcomm-Atheros QCNFA34AC (ID: PPD-QCNFA34AC). Nothing 4x4 MU-MIMO yet for a client adapter(s) have showed up to my knowledge..
1.4Ghz dual-core processor (maybe a Qualcomm-Atheros IPQ8064 ??)
My initial thinking too. They have been released and been developed on since later 2013. Routers were supposed to be released on such chip in the 1st half of 2014, and these are the only dual core 1.4GHz that I know of. This is the one SoC that I have been interested in since its news release. Curious as to what the results will be from Tim's testing.
A 4x4 MU-MIMO STA would be silly. The whole point of MU-MIMO is to get better bandwidth utilization with lower class clients.
A 4x4 client matched with a 4x4 AP would use normal beamforming.
I'm pretty sure when 4x4 adapter comes, MU-MIMO is included in its features but I'm not sure how it would react to other fewer stream clients (all have MU-MIMO as well) when that feature is off or on in the 4x4 adapter settings. Any thoughts? I would guess that those 2 fewer stream clients will behave like SU-MIMO due to 4x4 adapter using up all the streams regardless of the 4x4's settings for MU-MIMO.
My understanding (and what makes most sense to implement) is that the router controls MIMO, not the clients.
When the 4x4 client needs bandwidth, it gets it with all antenna. When it's time slice is over, then it will do MU-MIMO as usual.
That makes sense. Silly me, MU-MIMO is implemented on Tx stream (not both Tx and Rx) of the AP so AP is the one who would manage it. Router's firmware should be smart enough to figure out if it's going to utilize it or not if there's a client that needs all of its streams for highest throughput.
Last edited by theveterans; 06-15-2014 at 07:23 PM.
Will this finally motivate companies to make faster wifi adapters. It see (really want to upgrade the laptop wifi adapter, but no one makes any 3 stream 802.11ac adapters for laptops (which could be argued as the platform that needs it the most.
2 stream 802.11ac adapters should have been skipped and made so that smartphones will get 1 stream 802.11ac adapters, and laptops and high performance tablets would get 3 stream 802.11ac.