- This topic has 6 replies, 1 voice, and was last updated 4 years, 11 months ago by anuj.
29th November 2013 at 15:24 #69360anhGuest
When using coverage mode of twin TRE to improve coverage, do we need:
– enable any feature?
– install another antenna/sector? (3 sectors –> 6 antennas)
– Any KPIs degradation?
Many thanks,29th November 2013 at 21:38 #69361RexGuest
you should configure twin TRE as a single TRX and use no combining mode, use antenna duplexer (agx) for example, or if you have agc combiner try to connect TRE without combining (check documentation).
Rex30th November 2013 at 14:33 #69362anhGuest
Most of the cell have 2 TRXs (1 twin TRE). Coverage mode MUST use Tx diversity? (correct me if i’m wrong)
From my understand
– At OMC: configure twin TRE as a single TRX for coverage mode.
– At site, connect 2 Tx ports of the twin TRE to 2 Tx ports of the ANC (w/o combining).
-> The X-pol antenna will be Tx diversity. No need to install another antenna for the sector?
How about uplink? Is it mandatory to have TMA, else CSSR will be degraded?1st December 2013 at 08:42 #69363pixGuest
Coverage configuration = TX Diversity. By definition.
Your connectors configuration is fine. One X-Pol antenna will transmit both Tx signals (one from each port).
UL will be too weak, and the cell coverage will become “uplink limited”. To counter this, you must either install TMA or install a secondary X-pol antenna. The latter allows to get 4-Rx-Div.
Cheapest solution is the TMA, definitely 🙂
You can leave with a UL limited cell, and the coverage gain compared to a capacity mode is still interesting. But if you really want to maximize the coverage (maybe not on all cells, but on the most critical?), then think about adding a TMA.
pix1st December 2013 at 13:28 #69364anhGuest
Thanks Pix, Rex.
It’s clear now.7th June 2014 at 14:28 #69365tonyMGuest
Can somebody confirm that all manufactured ALU twinTRE-s: TGT09 and TGT18, have both ‘TxDiv’ and ‘4 Rx Div’ features factory activated?
Are there any ALU twinTRE-s with ‘TxDiv’-support, but only ‘2 Rx Div’-support, i.e. ‘4 Rx Div’-restricted?23rd December 2015 at 14:47 #69366anujGuest
@tony,you can check about tx diversity of twin tre in BL export report