Jump to content
lilotimz

How to Identify T-Mobile network equipment (Ericsson)

Recommended Posts

T-mobile Ericsson Cell Equipment

 

For Ericsson markets t-mobile uses what is known as AIR antenna units which have the radio unit integrated with the antenna. This type of setup significantly reduces signal loss from the radio to the antenna since they're both practically next to each other and not sepearated by coax jumper cables like that of a remote radio unit.

 

Basic Ericsson AIR21 setup

(Note typically there are 2 Ericsson AIR per sector)

duwGQ3X.jpg

 

Rxtis9g.jpg

 

6ZH5KqX.jpg

 

Ericsson AIR21 + Band 12 700 mhz Equipment

 

Note the addition of a new low band 700 mhz capable antenna + Ericsson RRUS11 B12 (remote radio units) in addition to new TMA (tower mounted amplifiers) connected to the AIR antenna. The new Ericsson RRUS11 B12 + Antenna addition is for tmobiles band 12 700mhz (L700) deployment. 

25f06bb.jpg

(Credit: tmo.rocks)

 

Credit for the photographs belong to whoever took it. You know who you are! :)

  • Like 5

Share this post


Link to post
Share on other sites

Glad to see you like my photo [i got lots more ;)Here is my related post from another thread:

 

 

For Ericsson AIR21 sites, there is currently one active PCS HSPA+/GSM and passive AWS HSPA+ plus one active AWS LTE and passive mid-band empty. 

  • Like 1

Share this post


Link to post
Share on other sites

Why is Sprint not using the Air antenna type?

Share this post


Link to post
Share on other sites

Why is Sprint not using the Air antenna type?

 

Was not commercially available and does not support CDMA. 

Share this post


Link to post
Share on other sites

Significantly reduces signal loss compared to RRU?

It's posted somewhere here that there's barely any loss for RRUs. Which is it?

 

 

 

Sent from my iPhone using Tapatalk

Share this post


Link to post
Share on other sites

Isn't this a huge overlap with t4gru?

 

Is there a possibility to make some threads aliased ?

 

 

Sent from my iPhone using Tapatalk

Share this post


Link to post
Share on other sites

Why is Sprint not using the Air antenna type?

 

Was not commercially available and does not support CDMA. 

 

Originally, the radios were inside the cabinets on the ground. Power and data cables flow into the radios, and a broacast signal flows out to the antennas over coaxial cables. As soon is this happens, you have signal attenuation and an opportunity to introduce interference. An RRU lets you move the radios out of the cabinet and closer to the antenna, thus reducing the attenuation. The AIR antenna effectively builds the RRU into the antenna, making the effective distance almost zero.

 

Now an RRU can give you 98% of that benefit, if you mount the RRU right next to the antenna. Or you can mount the RRU further away from the antenna (maybe the structure can't support that much weight at that height), but you introduce more signal attenuation/interference the further from the antenna you move it. So you get some additional flexibility using that setup. But it does make the setup a little more complicated, and there may be some benefits in terms of total weight or wind loading by combining the RRU and antenna into a single unit. So there are pros and cons to doing AIR vs antenna and RRUs. But naturally if it wasn't available at the time and doesn't support CDMA then it wasn't an option for Sprint.

  • Like 1

Share this post


Link to post
Share on other sites

Quick question out of curiosity - why are ATT/VZW/TMO lowband antennae so large while Sprint's are so small?

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • gallery_1_23_9202.png

  • Similar Content

    • By lilotimz
      Hello everyone!
       
      It is the belief of myself and of the staff that it is time to reopen a new T-mobile LTE and Network discussion thread due to the implementation of "network prioritization" that tmobile is doing to its subscribers. 
       
      As Sprint has similar language in its TOS, we believe that it is worthy of being discussed here as Sprint may do something similar on a site by site basis.
       
      This thread will be strictly for discussing T-mobiles LTE network and technologies and not about personalities, their followers, and etc etc which may be better suited for S4GRUs sister site for T-mobile T4GRU. 
       
      As a result this thread will be heavily moderated to stay on topic but I view the S4GRU member base very favorably and trust that we won't have much problems here.
       
       
    • By lilotimz
      Ericsson RBS 6501 B25 Outdoor Micro Base Station
      Model: KRD901 125/X
      ------------------------------------------------------------------------------------------------------------------------
      RBS 6501 setup utilizing the integrated antenna
       

       
      RBS 6501 utilizing external omnidirectional antennas
       

       
       
      -------------------------------------------------------------------------------------------------
      Ericsson RBS 6401 B25, LTE
      Multi-standard indoor pico base station
      Model: KRD 901 043
      ---------------------------------------------------------------------------------------------------
       
      Front
       

       

       
       
      Back
       
       

       

       
       
      Bottom
       

       
       
      Top without External Antenna Capability
       
       

       
      Top with External Antenna Capability
       

    • By derrph
      With the introduction of the new plans Sprint has announced. I told one of my friends about the $60 unlimited plan and she was shocked yet happy about it. She currently has T-Mobile and there has been times where my Sprint service has out performed her service even in the city with puling up information and out of town...well... you already know how that went. She was talking about switching and stuff but then she sent me a typical article bashing Sprint and I got irritated by it and I had to explain to her that Sprint is not bad at all. These articles are based on past experiences from 3+ years ago. I told her I'm pulling 60+ mbps on LTE but she's worried about Sprint being slow ( because of what she read). Guys give me some advice on persuading her to give Sprint a chance. 
       
      I feel like articles that are being posted is what keeps away customers.  It makes no sense that T-Mobiles 2g network is not spoken about when they are in the news for changes to plans and such. But good ol Sprint makes changes and articles that get posted rips Sprint apart for filth. 
    • By lilotimz


      Ericsson RRUS31 B25 + RRUS11 B26

       

      These are the newest and greatest remote radio units to come from Ericsson. 

       

      The new Ericsson RRUS31  B25 should be fairly distinctive compared to the earlier RRUS11s and now the RRUS12s being deployed by ATT and Verizon. One of these new RRUS31s can do the job of two earlier RRUS11s thus reducing deployment costs for Sprint and complexity in deploying new sites and making it easier for users to spot as there are now 4 jumpers coming out of one RRUS31 rather than two from each RRUS11 that Ericsson originally deployed. 

       

      All future deployments will be utilizing the new Ericsson RRUS31s. In addition Ericsson are sending crews to their original deployments and swapping out older RRUS11s for these new RRUS31s due to the aforementioned fact that one RRUS31 can do the job of 2 RRUS11s. Weight savings will be significant at sites where there are 4 or 5 RRUS11 B25s that can be replaced by one or 2 RRUS31s. The Ericsson RRUS31 deployment project is known as the 65 Mhz Project. 

       



       



       

      Ericsson RRUS11 B26 top and RRUS31 B25 bottom

       



       

       



       

       

       

      Ericsson High Capacity / 4x2 MIMO Deployment

      Note the additional antenna + PCS radio.

       

      Previously Ericsson utilized additional PCS radios and used RF combiners for high capacity setups where they utilized three or more PCS radios. This new setup will utilize a completey new antenna + radio set just like Samsung and run 4x2 MIMO on the LTE antenna / radio set. 

       



       





       

      Ericsson RRUS11 B25 [EOL'd] and B26

       

      A standard Ericsson Network Vision 1.0 site with 3 RRUS11s where two are dedicated to PCS and one to SMR.  

       

      This type of setup is no longer deployed or utilized in new sites. Existing sites will be slowly converted to newer RRUS31 B25 via the Sprint 65 mhz project. 

       



       

      Ericsson NV high capacity site [EOL'd]

      3 or 4 PCS RRUs are present for a total of 4 or 5 RRUS11s per antenna. 

       



       



       



       

      Close up of Antennas

       



       

      Ericsson cabinets 

      (center)

       



       

       

      All credit to those who took the photographs. They know who they are!

    • By belusnecropolis
      http://ces.cnet.com/8301-35284_1-57616761/how-i-got-t-mobiles-ceo-kicked-out-of-at-ts-ces-party/
      Roger Cheng @cnet appears to have had the most fun out of this, it kind of wrote the story for him I guess, so there is that. Also, just noticed the extra title Q, that is gonna drive some people nuts today. Top lel.
  • Posts

  • Recently Browsing

    No registered users viewing this page.

×