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Thread: LTE (and 5G) knowledge sharing

  1. #136
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    My home site recently got an upgrade. 2 carrier of B7 added + B5. If I'm not mistaken this site also has 3.5 for bell wireless home internet? Sheytoon, would you please verify if B7 channels are 2x2 or 4x4? If you don't mind? Just curious to see what work was done.

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  2. #137
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    Only B2 is 4x4.
    Want to learn more about how LTE works?
    https://productioncommunity.publicmo...ls/td-p/130581

  3. #138
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    This is the tower I was talking about.
    Chaparral Blvd and 194th Ave in Calgary.
    About 100 meters from it we have a Rogers tower on Walden Blvd, so this is all Telus.
    On cell mapper I don't see that this is a shared tower with freedom.Name:  20191001_162913.jpg
Views: 119
Size:  30.2 KB

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  4. #139
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    Based on the data from ISED, top 2 layers are Telus (45m, 43m). Third layer is not listed so it may not be active yet, but probably Telus.

    Layers 4, 5, 6 are Rogers (35m, 32m, 26m), and there's a big gap between layer 5 and 6.

  5. #140
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    LTE (and 5G) knowledge sharing

    Layers 4 and 5 definitely look like Rogers (Ericsson) equipment, especially the RRUs. Layer 6, however, looks more like Freedom, particularly the way the RRUs look and their placement directly under the antenna panels...I’ve never seen Rogers install them that way before, but it’s very common for Freedom. So, it’s interesting that ISED shows that layer belonging to Rogers. Also, I’m not sure how accurate the ISED data is...it’s been a bit incomplete and messy lately according to the guy who runs the ertyu cell tower map site.

  6. #141
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    Yeah you might be right. I was trying to see the RRUs, but it's not a high-res photo so I got lazy and went with the ISED data.

  7. #142
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    This is the new tower from Rogers on Walden Blvd. I thought they had removed all equipment from the other tower as this is their new one.Name:  20190417_084235.jpg
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  8. #143
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    Usually operators will leave the equipment on the old site while they test the new location. Once they confirm the performance, they'll remove the old stuff.

    Is this a fairly recent site build?

  9. #144
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    FYI I found Rogers recently deployed 20MHz TDD B38 on a site in Vancouver, so something to look for. Not sure if it's massive MIMO or not, but TDD lends itself quite well to that.

    Last edited by zivan56; 10-05-2019 at 08:11 PM.

  10. #145
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    Quote Originally Posted by sheytoon View Post
    Usually operators will leave the equipment on the old site while they test the new location. Once they confirm the performance, they'll remove the old stuff.

    Is this a fairly recent site build?
    I took that picture in April this year. Its been up since March.

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  11. #146
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    Quote Originally Posted by zivan56 View Post
    FYI I found Rogers recently deployed 20MHz TDD B38 on a site in Vancouver, so something to look for. Not sure if it's massive MIMO or not, but TDD lends itself quite well to that.
    From the picture, it looks like eNB has 4TX, so it's not massive MIMO. I wonder what Rogers is doing with B38, it's not useful in CA combos as far as I know

  12. #147
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    Quote Originally Posted by sheytoon View Post
    From the picture, it looks like eNB has 4TX, so it's not massive MIMO. I wonder what Rogers is doing with B38, it's not useful in CA combos as far as I know
    Massive MIMO doesn't get indicated with NSG in that way (it only sees MIB antenna count), it would be most obvious if I was able to see transmit mode > TM4 and some other signalling. Unfortunately, do not have a Rogers SIM anymore.

    Forgot to mention it does MFBI B41, so they can use a bunch of Sprint combos that would include North American FDD bands and TDD B41.

    I should also mention the selection criteria is set quite high, so the UE stops using it as soon as you head into a building with good signal still.

    Here is SIB1:

    Code:
        message -> c1 -> systemInformationBlockType1
          cellAccessRelatedInfo
            plmn-IdentityList[0]
              plmn-Identity
                mcc[0] : 3
                mcc[1] : 0
                mcc[2] : 2
                mnc[0] : 7
                mnc[1] : 2
                mnc[2] : 0
              cellReservedForOperatorUse : notReserved
            trackingAreaCode : '10001001 01011000'B(35160)
            cellIdentity : '01100010 00001110 00110001 1001'B(102818585)
            cellBarred : notBarred
            intraFreqReselection : allowed
            csg-Indication : false
          cellSelectionInfo
            q-RxLevMin : -55
          freqBandIndicator : 38
          schedulingInfoList[0]
            si-Periodicity : rf8
            sib-MappingInfo[0] : sibType3
          schedulingInfoList[1]
            si-Periodicity : rf64
            sib-MappingInfo[0] : sibType5
          schedulingInfoList[2]
            si-Periodicity : rf64
            sib-MappingInfo[0] : sibType6
          tdd-Config
            subframeAssignment : sa1
            specialSubframePatterns : ssp5
          si-WindowLength : ms10
          systemInfoValueTag : 29
          nonCriticalExtension
            lateNonCriticalExtension
              multiBandInfoList[0] : 41
            nonCriticalExtension
              cellSelectionInfo-v920
                q-QualMin-r9 : -16

  13. #148
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    Good to know, thanks for the info zivan!

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