Two-week joint tests of Tele2 and Scientific Research Institute of LTE and GSM collaboration in Omsk and Pskov ended successfully

Tele2 's press release yesterday announced that Tele2 and Radio Research Institute have successfully completed the testing of the first LTE 1800 network in Russia (based on Nokia Siemens Networks equipment) in the test zones located in Omsk and Pskov. The test results confirm that the quality of services in the GSM network has not decreased, and the data transfer rate in the LTE mobile network has reached 75 megabits per second.

(These are the very tests that I mentioned at the beginning at Habrahabr in mid-March.)

The president of Tele2 Russia (Dmitry Strashnov), whose words are quoted in the same press release, expressed confidence that the emergence of LTE 1800 networks in Russia will help reduce “digital inequality”, and technological neutrality is the most effective way to develop LTE.
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Aleksey Boyko in LiveJournal community in ru_4g showed remarkable activity by publishing the synopsis of several Tele2 presentations at once, directly devoted to the past testing or being directly related to it:

• LTE 1800 test zones: Omsk and Pskov. Ritvars Krievs, Technical Director, Tele2 Russia. Omsk, March 28.
  
• Status and prospects of the 1800 MHz band. Svetlana Skvortsova, director of strategy and development for Tele2 Russia.
  
• The experience of frequency conversion is an argument in favor of technological neutrality. Sergey Fedosenkov, Deputy Director of NSN in Russia. Omsk, March 29.

Boyko (in the comments to the notes) and Maxim Bukin (in the article “ Tele2 showed live LTE ”) noted that the NSN mobile router failed during a test trip to Omsk in a car, and even before that it was not very good.

Personally, of all the above materials, Ritvars Krievs was most interested in how 2G spectrum compression was achieved by taking the existing frequency range intended for GSM and allocating part of the band for deploying the LTE 1800 network: in Omsk they allocated it for this purpose 2 × 10 MHz, and in Pskov 2 × 5 MHz.



How does this relate to the Liquid Net technology that Fedosenkov talked about and which dynamically allocates resources between network elements taking into account the changing load? It seems that the frequency of dynamism is not visible: a strictly defined piece of the range was bitten off by LTE, and the rest goes to GSM. One has to think that not other frequency resources are redistributed, but some other resources.