WE826 and MC7455 Carrier Aggregation Help

[KennethClarke]

Some context for my background. I live in a rural area without support for cable or dsl. Decided to go lte via ATT unlimited $30 plan which has supplied my home for about a year now using a lb1120. Band 2, 5, and 30 are available at my location with 2 being the fastest(About 45down & 25up after 8pm) Recently the lb1120 was jumping from band 2 to 5 but only under load and it has no support for bandlocking. My next step was to order a nighthawk mr1100 off ebay which ended up having the same problem and had a faulty ethernet port. I promptly returned it. I found Wireless Joint after scouring the web for help and ended up purchasing the MC7455 alongside the We826-t and it had a similar issue. It would select band 2 idle and ca band 5 and 2 under load. I dont have much command line knowledge but i was able to bandlock it to 2 and its been working fine but im wondering if you can force CA with 2 as primary and 5 as secondary to get better speeds or if it is up to the modem to decide CA and i can just select the group.
Im currently 2.5 miles from the tower

Band 2
rsrp -97 rssi -14
45down 25 up
27ms latency

Band 5
rsrp -86 rssi -10
14down 4up
34 latency

Please pardon me if i use the incorrect terms for anything i am new to lte and the forum thank you in advance.

[JimHelms]

You cannot pick what band the modem will use as the primary band in a group for Carrier Aggregation.

[gscheb]

Hello,

This is pasted from this post = viewtopic.php?f=15&t=588

First disclaimer that I am still new to allot of this.

Recently went thru this my self. Have T-Mobile where I wanted band 2 as my primary and band 12 as my secondary. Had same issues as you did. When it was the other way around with 12 as primary and 2 as secondary speed went way down.
How I got mine to to stay with the CA that I wanted was using outside antenna. Can only describe as a sweet spot that was found. Can literally go outside and move my antennas up or down two feet and the carrier aggregation will go back to where I don't want it. Honestly stumbled on to this by mistake. By just simple moving the antennas relentlessly over and over trying to find the best speeds. At the end of the day, think we have to remember this stuff wasn't designed for home internet use. Was made to keep a phone connected driving down the road. And for what ever reason at that height mine does what I want it to do.
The antennas used in this set up are two log periodic antennas. They sell some on this site (698-2700MHz Yagi Radome 9dBi-11dBi 4G LTE Directional Antenna)
If you don't want to install an outside antenna yet maybe try some other inside external antenna. Antennas have really helped my set up allot.
Hope maybe this can be helpful to you.

If anyone wants to help explain this sweet spot effect of the CA would like to hear it myself.

[BillA]

Hello,

If anyone wants to help explain this sweet spot effect of the CA would like to hear it myself.

The term "Sweet spot" means finding an ideal location for your router where the main and diversity antennas get the proper polarization in relation to the each other, so that when the waves arrive at a slight time delay to each antenna, it allows the radio to take advantage of the MIMO effect (Multiple In Multiple Out). When all's aligned properly, you will notice a considerable speed increase. Moving the router even a few centimeters around can have a drastic effect on the speeds, so try to move it just a little then do a speed test after each adjustment. Sometimes tilting the two mobile antennas slightly at an angle (as much as 45 degrees) can also help. That's in a nutshell, but if you want to learn more about it just search for "MIMO" on YouTube.