3G Diplexer Trial Report

IntroductionWith Diplexers in Antenna Line, GSM1800 and UMTS2100 can share one common Antenna and RF feeders & thereby reduce Load on the Tower. Diplexers are cost effective solution for network deployment.Diplexers introduce a low Insertion Loss of 0.15 0.2 dB (typical), 0.3 0.4 dB (Max).Microdata Diplexers weigh 2.0 to 2.3 Kgs based on the frequency band. Filters (Diplexers, Triplexers & Quadruplexers) are used in OD/ID, IBS / DAS applications where two or more BTS Systems in Bands 2G, 3G , 4G are colocated on/in the same Tower, Shelter or BTS Site OD / ID

Benefits

Antenna and Feeder Sharing By using DiplexersAntenna and Feeder Cable can be shared by 1800 and 2100 MHz bands. 3nos of additional antenna and Feeder Cables along with accessories like clamps, earthing kits etc can be saved .Antenna Sharing in 1800M+2100M scenario : One 2 Port Wideband Antenna instead of 4 Port Antenna Approx Rs. 30K saving per site towards additional antenna systemTower loading : Tower loading shall reduce due to saving on additional antenna and feeder cables.

SpecificationsMicrodata MI201n1 Diplexer

HYD00788 - AP

Configuration 2 Sectors Diplexer (1800 / 2100)2 Port Single Band 3G Antenna is saved after installing DiplexerRF Feeder Cable XXX900 BTSXXX2100 RRHXXX 1800 BTS Jumper JumperExisting Scenario Without DiplexerRF Feeder Cable XXX900 BTSXXX2100 RRHXXX 1800 BTS Jumper JumperDiplexer MI-20101Antenna Line With Diplexer Installed2 Port Single Band 3G Ant Spare2 jumpers installed.Note: 2 Port Single Band 3G Ant Spare / SavedDual Band 800+900 / 1800+2100 DBXLH-6565C-VTM (Andrew)2Port Single Band 3G Ant (Andrew)

VSWR Measurement (Site ID - HYD00788)Observations : AL VSWR Variation Pre & Post Diplexers Installation is 0.01 - 0.02.

Sector 1Without DiplexerWith Microdata Diplexer1800 BandTx/Rx1.311.33Rx1.321.342100 BandTx/Rx1.241.27Rx1.261.28

Sector 2Without DiplexerWith Microdata Diplexer1800 BandTx/Rx1.321.35Rx1.321.342100 BandTx/Rx1.281.30Rx1.251.28

Pre Drive Post DriveDedicated Mode RSCP -Drive Plot -Muthnagi

Pre Drive Post Drive Dedicated Mode RSCP-Histogram Plot -Muthnagi

Pre Drive Post Drive Dedicated Mode Ec/No Plot -Muthnagi

Pre Drive Post Drive Dedicated Mode Ec/No Histogram -Muthnagi

PRE-POST 3G KPIs ComparisonObservations : No major variation in KPIs post installation of Diplexer

CS-RRC Success ratePS-RRC Success rateSite IDCell NamePrePostPrePostHYD00788HYD_Muthangi_X99.66%99.59%99.92%99.88%HYD00788HYD_Muthangi_Y99.82%99.79%99.91%99.68%HYD00788HYD_Muthangi_Z99.80%99.87%99.80%99.92%

CS-RAB Success ratePS-RAB Success rateSite IDCell NamePrePostPrePostHYD00788HYD_Muthangi_X99.44%99.53%99.76%99.77%HYD00788HYD_Muthangi_Y99.36%99.33%99.81%99.84%HYD00788HYD_Muthangi_Z98.77%98.50%99.34%99.74%

CS-RAB Drop ratePS-RAB Drop rateSite IDCell NamePrePostPrePostHYD00788HYD_Muthangi_X0.37%0.48%0.53%0.39%HYD00788HYD_Muthangi_Y0.62%0.44%0.44%0.50%HYD00788HYD_Muthangi_Z0.52%0.72%0.71%0.25%

CS Traffic (Erl)PS Traffic (MB)Site IDCell NamePrePostPrePostHYD00788HYD_Muthangi_X9.38.8769.6684.3HYD00788HYD_Muthangi_Y15.213.01142.51283.7HYD00788HYD_Muthangi_Z5.28.6304.7636.6

InferenceVSWR Measurements Negligible change (Approx 0.02 - 0.03) in VSWR of Antenna Line with Diplexer installed.

3G DT Measurements Negligible change in Pre & Post DT Measurements of RSCP & Ec/Io. No Change in cells coverage area.

3G KPIs No Major Variation in 3G KPIs except some random, negligible, statistical variations.

RecommendationsMicrodata Diplexers can be used wherever we have space constraint for installing the additional antenna system for installing new 3G Sites in our 3G Circles having GSM in 1800 or 900+1800 Band.Installing Diplexers can save ~ 40 to 60% Capex on the requirement for additional Feeder Line and Antenna for 3GMicrodata Diplexer has negligible impact on the KPIs and Drive Test observations made pre and post Diplexer implementation.

Capex Saving Analysis 2-Port Antenna System Vs. Diplexers38% Savings on Installing Diplexer when compared with New Antenna System For 3G

Capex Saving Analysis 4-Port Antenna System Vs. Diplexers61% Savings on Installing Diplexer when compared with New Antenna System For 3G

Unit Price Assumptions

THANKS

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