Objectives Upon completion of this module the participant will be able to: • Describe the structure of the Nokia Flexi EDGE BTS • Detail the differences in architecture between the Nokia Flexi EDGE BTS and the Nokia Flexi WCDMA BTS
Nokia Flexi EDGE BTS: simpler architecture with fewer units Functionality of required modules with bypass or wideband combining Logica l Sector modul e
Dual duplexer module Dual TRX module
GSM/EDGE RF
Control
Abis IF Example Power module Power module (optional) 48 VDC (optional)
• Nokia Flexi EDGE BTS is based a the new Nokia Flexi BTS platform • Modular BTS structure is based on 19” mechanics • No cabinet is needed for a fully functional BTS • No BTS back-plane to fix module positions: Ethernet based signaling between modules
• Nokia Flexi EDGE BTS has a different module design • Dual TRX module with integrated Baseband and add-on duplex filter • System module providing BTS O&M, transmission and power distribution
• New BTS installation options • Stack, wall and pole mounting
• Nokia Flexi EDGE Dual TRX can be optimized either for Capacity or Double Power modes • Capacity mode: both TRXs in the unit are used for capacity (bypass or combining is used) • Double Power transceiver (DPTRX): synchronized combining of TRX to one antenna feeder to double the power Company Confidential 8
UltraSite BTSvs Flexi EDGE BTS – main Architectural differences • Ethernet Replacing former DBUS and FBUS • Network Processor handling ABIS & BTS O&M • Single DSP in DTRX Handling: • DSP • TRX O&M • Telecom signalling • Two carriers
• SW storage only at BTS level (in System Module) and SW DL to units at every boot-up • Transmitter Coherent Combining Support in DTRX • TRX loop only at sector level • RTC controlling TRX loop at frame/TS level • Power On/Off switching at unit level (from Power Distribution Module) Company Confidential 9
