LTE Flexi Multiradio BTS and Module Overview
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Mobility Management Entity (MME)
• Control Plane traffic handling • Session and mobility management • Idle mode mobility management • Paging • AAA Proxy • NAS signaling • SAE – GW SAE – System Architecture Evolution Serving GW • User plane anchor for mobility between the 2G/3G access system and the LTE access system • Lawful Interception PDN GW (Packet Data Network Gateway) • Gateway towards Internet/Intranets • User plane anchor for mobility between 3GPP and non-3GPP access systems (Home Agent) • Charging Support
• Policy and Charging Enforcement (Policy and Charging Rules Function communicates with Policy and Charging Enforcement Function within PDN GW) • Packet Filtering • Lawful Interception HSS - Home Subscriber Server PCRF - Policy & Charging Rule Function Serving GW and MME may be implemented in one physical node or separated physical nodes.
PDN and Serving GW may be implemented in one physical node or separated physical nodes.
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Property
System Module FSM
Two PA RF Module FRGA
One PA RF Module FRGB
High ambient air temperature limit [°C]
+50
High ambient air temperature limit with sun radiation heat load [°C]
+45
Nominal DC voltage [V]
48 40.5 … 57
Permitted DC operating voltage fluctuation (external supply range)[V] Optional Nominal DC voltage with DC- DC Module [V]
Optional Permitted 24 V DC operating voltage fluctuation (external supply range) [V]
Power Module FPMA
+24 (with Release 2 HW module FPDA)
+ 18 … + 32 (with Release 2 HW module FPDA)
Nominal AC voltage with optional AC Module [V]
240 (US 1-phase) 230 (EU 1-phase)
202 (Japan delta) Optional Permitted AC operating voltage and freq. fluctuation (external supply range) [V] [Hz]
184 … 276 V 45 … 66 Hz 0 … 184 V , 5…20 minutes when using FPBA with FPAA (time depends on AC Voltage input)
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All Nokia Flexi Multiradio BTS LTE modules are outdoor capable hermetically sealed and IP 55 class protected. The number of modules is minimised, e.g. for typical a 1+1+1 configuration only 3 modules are needed. Nokia Flexi Multiradio BTS LTE module mechanic parts Module core
The Core mechanics with optional front and back covers shield the module against water, snow, and solid foreign objects and makes the module IP 55 weatherproof. The Core mechanics provide EMC shielding. All connectors are at front with weather protecting covers. Module casing Casing supports the pile of modules. Module Core can be changed even the module is at the bottom of the module stack.
Fan sub-module Fan sub-module provides the fresh air cooling to module. The module controls the fan according to temperature information.
Two redundant fans enable module operation in normal temperature even with one fan. The Fan sub-module can be changed in operational module at site where back access is provided. Optional Front and Back covers for BTS site installations without cabinet or Optional Outdoor Cabinet
The outdoor cabinet includes door lock and door alarm switch.
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The System Module is equipped with the following interfaces: The System Module provides the following BTS external interfaces:
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BTS Site Element Manager
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transmission interfaces
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three external interfaces towards RF
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site support system interface (for example, battery back-up)
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auxiliarity interface (customer-specific Ethernet port with overvoltage protection)
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auxiliarity interface Ethernet for future expansions
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external alarms and controls interface (customer-specific alarms)
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external synchronization input interface
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external synchronization output interface
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baseband extension interface
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Table: System Module connectors The 10/100 Eth OVP cable fulfils overvoltage surge protection standard GR-1089 Core Intrabuilding. The overvoltage protected OD fast Ethernet cable is for indoor and outdoor usage.
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Flexi LTE BTS Baseband (BB) processing The Baseband Processor(s) (=Flexi Signal Processor version C, FSPC) terminates the Iub user plane and is responsible for L1 processing of the air interface. The rel. 2 System Module type FSMC (not LTE capable) includes one signal processor, the FSMD has two and FSME has three.
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FSMF – Rel.3 System Module for Outdoor FPFD – optional Power Distribution Module for FSMF
FTIF – optional Transport Sub-Module for FSMF FBBA – Optional Baseband extension Module for FSMF
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System Module and RF module/RRH require 48v DC power supply.
In local installations, the System Module provides DC power supply to the Radio Modules. In Feederless / Distributed Sites the DC power supply to Radio equipment may be provided by any other (48v) DC source. For 24v DC environment there is a DC-DC converter 24v 48v available (FPDA).
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Power is distributed from Flexi Power Distribution and Fuses (FPFA and FPFB) to the System Module. The FPFA is used with System Module rel. 1, whereas in System Module rel. 2 it is replaced with the FPFB, which gives more power feeding capacity to RF Modules. The FPFB is compatible with both System Module releases.
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Functional description: FTLB supports following physical interfaces: - 2 x electrical Gigabit Ethernet, RJ45 (10/100/1000Base-T)
- 1 x optical Gigabit Ethernet, via optional SFP (e.g. for 1000BaseSX/LX) - 4 x E1/T1/JT1 symmetrical, RJ48 (coaxial E1 supported via baluns) It provides HW supports for Ethernet features like: - Dual Iub, Native Iub/IP
- Timing over Packet (ToP) - Synchronous Ethernet (SE) slave functions FTLB is prepared also for Synchronous Ethernet Regeneration. This allows to synchronize either a collocated BTS or even a chained BTS on another site via Synchronous Ethernet. All three GE interfaces can be used simultaneously with basic Ethernet switching functionality (RAN1847 Basic Ethernet Switching).
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Functional description: FTLB supports following physical interfaces: - 2 x electrical Gigabit Ethernet, RJ45 (10/100/1000Base-T)
- 1 x optical Gigabit Ethernet, via optional SFP (e.g. for 1000BaseSX/LX) - 4 x E1/T1/JT1 symmetrical, RJ48 (coaxial E1 supported via baluns) It provides HW supports for Ethernet features like: - Dual Iub, Native Iub/IP
- Timing over Packet (ToP) - Synchronous Ethernet (SE) slave functions FTLB is prepared also for Synchronous Ethernet Regeneration. This allows to synchronize either a collocated BTS or even a chained BTS on another site via Synchronous Ethernet. All three GE interfaces can be used simultaneously with basic Ethernet switching functionality (RAN1847 Basic Ethernet Switching).
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Functional description: FTLB supports following physical interfaces: - 2 x electrical Gigabit Ethernet, RJ45 (10/100/1000Base-T)
- 1 x optical Gigabit Ethernet, via optional SFP (e.g. for 1000BaseSX/LX) - 4 x E1/T1/JT1 symmetrical, RJ48 (coaxial E1 supported via baluns) It provides HW supports for Ethernet features like: - Dual Iub, Native Iub/IP
- Timing over Packet (ToP) - Synchronous Ethernet (SE) slave functions FTLB is prepared also for Synchronous Ethernet Regeneration. This allows to synchronize either a collocated BTS or even a chained BTS on another site via Synchronous Ethernet. All three GE interfaces can be used simultaneously with basic Ethernet switching functionality (RAN1847 Basic Ethernet Switching).
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The RF Module and Remote Radio Head (RRH) are stand-alone fully operational transceiver modules with integrated antenna filters. The RF Module and RRH are able to support one or two sectors in a Flexi LTE base station.
They host the RF functionality and provide control and power supply to the Flexi Antenna Line. Radio-related signal processing is performed in the RF Module. The RF Module has integrated fans and Bias-Ts. The RRH does not have fans. The RF Module can support one to three sectors with the following integrated components: •
Transceivers with TX for two carriers (three transceivers in the Triple RF Module, two in the Dual and one in the Single RF Module)
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Transceivers with RX for two carriers with diversity (the carriers must be adjacent) (three transceivers in the Triple RF Module, two in the Dual and one in the Single RF Module)
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Linear power amplifiers (three in the Triple RF Module, two in the Dual and one in the Single RF Module)
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RF filters with main and div branch (three in the Triple RF Module, two in the Dual and one in the Single RF Module)
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48 V DC input power supply
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Masthead amplifier and 3GPPAntenna tilt power feed and control for up to three sectors
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Interface to the System Module
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Interface for chaining System Modules (Triple RF Module only)
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Integrated fan assembly (two fans)
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Full operational bandwidth support
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Antenna connector interfaces
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Prepared for AISG2.0
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The figure above shows fully equipped Flexi Power Module (FPMA) with AC/DC converters (FPAA) and Batteries (FPBA).
FPMA is the casing, AC and DC cable connector box and support frame for actual power sub-modules FPAA, FPBA and FPDA. Flexi Power AC-DC Sub-Module (FPAA)
The main function of FPAA is to provide 48 V DC power from AC to be used by the BTS modules. FPMA can house from one to three AC/DC rectifiers. Output power of each AC-DC rectifier is 1 kW. Flexi Power Battery Sub-Module (FPBA) FPBA is a separate optional sub-module to be used together with ACDC Module (FPAA). FPMA can house up to three Battery sub-modules. Battery sub-module provides up to 10 minutes battery back-up time when the Flexi BTS site AC power mains is down. FPBA is maintenance free Lithium Ion battery bringing significant savings in operaover 10 years of Li-Ion battery life time.
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The figure above shows fully equipped Flexi Power Module (FPMA) with AC/DC converters (FPAA) and Batteries (FPBA).
FPMA is the casing, AC and DC cable connector box and support frame for actual power sub-modules FPAA, FPBA and FPDA. Flexi Power AC-DC Sub-Module (FPAA)
The main function of FPAA is to provide 48 V DC power from AC to be used by the BTS modules. FPMA can house from one to three AC/DC rectifiers. Output power of each AC-DC rectifier is 1 kW. Flexi Power Battery Sub-Module (FPBA) FPBA is a separate optional sub-module to be used together with ACDC Module (FPAA). FPMA can house up to three Battery sub-modules. Battery sub-module provides up to 10 minutes battery back-up time when the Flexi BTS site AC power mains is down. FPBA is maintenance free Lithium Ion battery bringing significant savings in operaover 10 years of Li-Ion battery life time.
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