You can either have 110mbps transmit or receive (but not at the same time.) If you do it at the same "time" and the air time was split 50/50 then you'd have 55mbps transmit and 55mbps receive at the same time. Technically this is not at the same "time" as TDD can only receive or transmit at any given moment. It's just switches so fast between transmit and receive that it looks like its happening at the same time. I hope that makes sense. I'll likely be splitting most of the air time for download, since most users want higher download speeds than upload.xdavidx wrote: ↑Mon Jul 15, 2019 9:52 pmSorry, I'm not understanding this. If they got 110 Mbps aggregate, and if aggregate the total of the send speed plus the receive speed, when sending and receiving at the same time, then how is it 110 Mbps in one direction when not sending in the other direction at the same time?
Distance was too great, or needed to be pointed better, or the channel was too noisey from other systems around there? Why do you think it wasn't able to hit the higher modulation?
Hey, if they don't have any other way to get internet, then I suppose 10 Mbps would seem pretty darn nice. With just simple math and ignoring possible slowdowns from multiple users hitting it at the same time, and slowdowns from spreading the signal out over a wider beam width with sector antennas, that's 110 users over that 110 Mbps link (or more, depending on your answers about single direction speeds). In a sparsely populated area, that seems like a lot of people!
I agree about the 1 Gbps not being totally necessary. I am looking forward to faster speeds than my 10 Mbps DSL here, with my LTE setup, because:
A) I have multiple people in the house who stream video at the same time. We got rid of our satellite TV service a few years ago and all our TV is through streaming now. Not to mention Youtube use by my kids.
B) It allows for 4K video, which wants about 25 Mbps. I don't have any 4K TVs yet, but I'm sure in the future I will eventually.
C) You can never have enough speed for large things that need to be fully downloaded, like software installation files, software updates, non-streaming video files, tons of digital images (moving stuff around for home movies/photos), etc.
But if people are brand new to the internet, (A) and (B) probably aren't going to matter to them and (C) is more of a unique thing for someone who does a lot of computer work.
In my area, there are others who have access to cable (I don't), so it would be very difficult for me to compete with that if I wanted to set up a WISP. I could compete with the phone company on the DSL no problem, since the speeds are slow and the service is horrible. There might be some more rural areas here where they don't have access to cable. I'll have to ponder that a bit. I do know that I used to check for any WISPs that might have sprung up, every few months, praying that something other than DSL would become available to me. I did that for *years*! So discouraging to have no other options. I'm sure there are others who feel the same way.
So you'll have 2 sectors operating next to each other and each will have their own channel, so no interference, or will your 2 sectors be back to back and use the same frequency? I read up on the sync stuff before, but don't remember all the details. Is that where all the tower antennas send to all the customer antennas at the same time and then they all sync in sending the response packets back at the same time, so that you don't end up with collisions (or greatly reduce them)?
I imagine there is some latency added with that, but probably works out better than dealing with all the collisions.
How do you deal with non-customers who are in the path of your antennas and have home wifi setups? They get slowed down or have to know to move channels (assuming they aren't set for automatic channel assignment)? And then, for your customers, you tell them which channel(s) to avoid for their home wifi?
I basically just needed a stronger signal to get higher modulation. Real world though is always very different, so even though you might be getting a strong enough signal for 256 qam doesn't mean you can always hit it. I suspect when I have much higher quality sector antennas, and high gain (25dbi+) CPEs I'll be able to maintain 256 qam.
Users won't all be limited to plans at 10mbp. I'll have a combination of users with 10/25/50mbps download plans on a 20mhz channel. The reality is, most users don't use their max download all the time, so you can get away with this. Realistically each AP will probably have a max of 35ish CPEs connected. It really depends on how busy those users are, but I don't want to get too high in over subscription and cause issues.
I don't think it would be that hard for your to compete with cable. There is DSL companies and Cable companies around here, but they all typically have poor customer service and spotty connectivity.
That's correct on the frequency reuse. GPS sync really doesn't add any over head, it just helps reduce self interference so one can re-use channels.
Interference on the CPE side can be an issue. I'll providing the in house router/AP and will be able to make sure the inside frequencies don't conflict with the CPE outside. Neighbors will be outside of my control though, but a high gain CPE helps reduce any interference and noise. In the screenshots above you can see the noise floor on the station side (which was the simulated CPE in this case) was -97 which is super low. I also used the litebeams a bit on my property to connect my moms house to mine and easily saw a -100dbm noise floor cause homes are so spread out around here. In the city it might be a bit harder to get than, but we should be okay regardless.