@Junie-Galvan said in 802.11 Standard - "Maximum Allowable Streams":
Please excuse my newbie question:
These questions are related to 802.11 connections. I’ve seen a course note material that stated:
802.11 a – have 1 Maximum Allowable Streams
802.11 b – have 1 Maximum Allowable Streams
802.11 g – have 1 Maximum Allowable Streams
802.11 n – have 4 Maximum Allowable Streams
802.11 ac – have 8 Maximum Allowable Streams
Q1: What does “Maximum Allowable Streams” mean? Is it related to a Half and Full Duplex connections?
If you're using wireless, the reality is that you're either sending or receiving data-single in or single out. Each standard mention with the
maximum allowable stream means that this is it's operation capacity (send or receive, not simultaneous). The answer to your follow up question is "Yes." It is related to the concept with Half Duplex, you're sending or receiving; with Full Duplex, you're sending and receiving.
Q2: Does “Maximum Allowable Streams” mean to say that you have 1, 4, or 8 antennas needed to stream a data? If so..
Yes and no. If you want full duplex, regardless of media, you want to send and receive simultaneously. To do so you would need separate channel to do send and another to receive.
Q3: What is the minimum or maximum suggestive antennas that can be physically installed in these 5 Access Point standards?
The standard sets this as what is listed above. If you buy a SISO (Single IN, Single OUT) then only one is needed if you buy a MIMO ( Multiple IN, Multiple OUT) there is probably no
physical limitation except for size of device and acceptable interference levels which is beyond what I know.
Q4: Someone says to me that, logically, every stream should produce a “half-duplex” connection per stream. So if 802.11n AP has 2 or 6 antennas in total, is it like 1 or 3 antennas are transmitting data and the other 3 are receiving data all at the same time (MIMO)?
If the device is
Full Duplex, it means you have multiple channels receiving and sending simultaneously. So if you have 8 streams that are max allowed. It means 4 of those are probably used for sending and 4 are used for receiving. Can it operate at 8 single half-duplex, possibly, but I couldn't say this for sure.
Q5: How about the 802.11 a to g? Am I right that they are only running at “half-duplex” mode because only 1 stream is allowed?
Yes! That is the nature of those standards and it's operates on CDMA/CA to insure that loss of traffic is minimum if not nearly impossible.
Again, sorry for this newbie question. I just wanted to make sure that I understand this "Maximum Allowable Stream" in 802.11 Standards before I move on to the next topic.
That's why were here. I don't know everything, or even anything at times but you've the resource of the entire ITProTV team and membership that are more than happy to jump in to help each other out here! Thanks for being a member!
Thanks in advance,
Edutainer Manager, ITProTV
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