Discussions: WiFi 802.11 series protocol and FTTH PON solution

Will the 802.11 ac replace the position of 802.11b/g/n to use on WiFi GPON ONT?

802.11 series protocol knowledge

  IEEE 802.11 is a set of media access control (MAC) and physical layer (PHY) specifications for implementing wireless local area network (WLAN) computer communication in the 900 MHz and 2.4, 3.6, 5, and 60 GHz frequency bands. They are created and maintained by the Institute of Electrical and Electronics Engineers (IEEE) LAN/MAN Standards Committee (IEEE 802).

  The 802.11 family consists of a series of half-duplex over-the-air modulation techniques that use the same basic protocol. 802.11-1997 was the first wireless networking standard in the family, but 802.11b was the first widely accepted one, followed by 802.11a, 802.11g, 802.11n, and 802.11ac. Other standards in the family (c–f, h, j) are service amendments that are used to extend the current scope of the existing standard, which may also include corrections to a previous specification.

WiFi 802.11 protocol and FTTH PON

WiFi 802.11 protocol and FTTH PON

“As title wish every members to comment on 802.11ac, which now is used on GPON ONT?”

Comment 1:
  Actually the Simple ONT with external WiFi is an option for ISP, I meet with many customers that who uses the GPON + AP.

Comment 2:
  I believe that this is the best solution for small providers because it’s cheaper than ont with ac wifi.

Comment 3:
  If ISP are asking for ac as part of the ONT, to me that suggests a fundamental misunderstanding of what the difference between n and ac is. ac in a multi dwelling unit or even a regular housing estate will bring little to no benefit to the end user(s) at all, due to congested air space with all radios fighting for channels and air time. Unless the ONT serves as a home hub for all mutli-media connectivity, using it as a wireless extension to the broadband service is overkill in my opinion.

Comment 4:
  As you may already know there is a big difference in terms of Data Rate and Throughput between 802.11n and 802.11ac. 11ac delivers data more quickly than 802.11n, with speed upto 6 times faster it is more oriented where only FTTH solutions are being deployed i.e. Spain, Portugal, Slovenia, Switzerland. for example Spanish operator is using 3*1 Home Gateway unit.

  As, I mentioned in my previous comments the only issue corresponding to Higher Frequency (i.e. Higher Energy) but Shorter Wavelength ( lower coverage). On the other hand side nowadays there are a number of devices equipped with 5GHz.

Comment 5:
  Well, yes. Up to 6 times faster in a clean air environment with 80MHz channels, in a laboratory. What FTTX speeds are we talking about here? greater than 1Gbps? Most likely not. Look at an enterprise deployment: even the latest generation WAPs only have 2 x 1Gbps ethernet ports on them, maybe the new 2.5Gbps NBaseT port. But that is for 20 + office workers, not 4 or 5 people sat at home watching IPTV.
  “I’m very pro for wifi- it just isn’t what must people think it is though, and lot of money is wasted on oversell.”

Comment 6:
  “In my opinion, it is not necessary to put the transport network and the local network. Anyway all the advantages on the side of GPON.”

Comment 7:
  “I know, if customer (telekom) wants ONT with ac wifi – they will get it. However, this model in my opinion causes more problems than separating ONT from wifi that can be placed anywhere in the building, or end customer may have more wifi stations.”

Comment 8:
  Exactly – the biggest problem is that i.e. customers complain that they don’t get 300Mbit/s – using wifi… In theory and in lab it works, reality sux…

Comment 9:
  11ac is also use to connect video bridges for IPTV services onnecting Video Bridge to Integrated ONT using WLAN (Also it is cost effective solution) using 11ac operators don´t need a separate Video Bridge so 11ac Integrated ONT also like work 3 in 1.
The Wifi throughput is always half of the Data Rate i.e.

  Here is basic formula.

Max Throughput = (Max Data Rate /2) divide by number of clients.

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