BTS Technology source: Nokia Siemens Network

Transcription

1 BTS Technology source: Nokia Siemens Network Ir. Muhamad Asvial, MSc., PhD Center for Information and Communication Engineering Research (CICER) Electrical Engineering Department - University of Indonesia asvial@ee.ui.ac.id Slide 1

2 Base station sites are the main energy consumers in a mobile network Other (controllers, core, OSS, etc.) 10% 90% BTS sites Site energy consumption (heating/cooling, etc.) 30% 70% BTS energy consumption Slide 2

3 Simplify site acquisition with Smart Sites and multiple installation options Traditional urban site: Equipment room in basement Traditional rural site Multiple installation options Stacked on floor or shelf Separated radio units On wall or pole Hidden sites BTS or 19 cabinets At base of mast or tower On top of mast or tower Slide 3

4 Reduce number of sites needed Coverage Share of BTS sites providing coverage/capacity Up to 50% fewer BTS sites Largest cell size by: Placing BTS exactly where it is needed 25% fewer sites with mast-top installation* Up to 50% fewer sites using best-in-class coverage features Industry-leading RF performance Capacity Legacy BTS Our Flexi BTS Highest BTS capacity with: Smallest BTS for any capacity Best-in -class software features to boost capacity Slide 4

5 Smart Sites decrease CAPEX Example 1: Traditional roof-top site Roof-top site from Nokia Siemens Networks Easier site acquisition No cranes needed Simpler installation No cabinets needed Easier site construction Shorter antenna cables Reduced CAPEX Example 2: Fewer sites needed Savings in antenna system Savings in Civil Works Traditional suburban site Suburban site from Nokia Siemens Networks Slide 5

6 Smart Sites decrease CAPEX Examples 4-5: Reduced CAPEX Smart rural site Traditional rural site Minimized site space Less site foundation needed Shorter and optimally placed antenna cables Slide 6

7 Smart Sites reduce operating expenses Reduced OPEX Lower site rent Dramatically reduced power consumption 60% less in our Flexi WCDMA BTS 35% less in our Flexi EDGE BTS Lower Operations & Maintenance costs Slide 7

8 Smart Sites minimize Total Cost of Ownership Reduced TCO Lower power consumption of equipment increases viability of renewable energy as power source Lower CAPEX where grid connection is very expensive High OPEX savings compared to diesel generator solution where sites are difficult to access and maintain Slide 8

9 Renewable energy for autonomous site The Autonomous Site can be powered by: Solar Power as individual solution Solar + Wind turbine + these both supported by generators Same standard products as offered by Solar/Wind Power System vendor Ready made/existing products that can be delivered immediately after selection Each site is unique - configurations depends on Site location Required load Required autonomy time Slide 9

10 Examples of Renewable Energy BTS Sites Slide 10

11 Radio Access Energy Efficiency Roadmap Past Present Future Discontinuous Transmission Radio Channel Allocation Improved Power Control Adaptive Multi Rate Common BCCH Single Antenna Interference Cancellation (SAIC) High Site Temperature Idle Timeslot Power Off Low Traffic Power Down Energy Saving Mode for BCCH RU10 Ready for Contract Multiradio BTS Orthogonal Sub Channel (OSC) Slide 11

12 Flexi EDGE BTS BSS Huge energy savings with Flexi EDGE BTS Flexi EDGE BTS is optimized for energy efficiency During high traffic energy saving by improved PA efficiency During low traffic energy saving by PA shut down by timeslot based Energy savings up to 52% compared to Ultrasite UltraSite TRX.209 BTS traffic load Energy consumption [W] Flexi Daytime Traffic Traffic [Erlangs or Mbps] TS0 TS1 TS2 TS3 TS4 TS5 TS6 TS7 TS0 TS1 on on off on on off off off on on BTS power consumption Old Ultrasite Flexi Bias on Low Traffic Bias off Time (00:00 24:00) Slide 12

13 Flexi EDGE BTS Dual TRX Power Down BSS Save energy during low traffic Shutdown of Flexi EDGE BTS Dual TRX during low traffic Energy consumption per Dual TRX box decreases from 40W down to 0W Saves energy during low traffic period For BTS the saving is 15% Energy consumption [W] All TRX Power On Low Traffic DTRX Power Down Daytime Traffic Traffic [Erlangs or Mbps] BCCH TRX 2 TRX 3 TRX 4 BCCH TRX 2 TRX 3 TRX 4 Time (00:00 24:00) All TRX on TRX 3-4 shutdown Slide 13 Feature ID(s): BSS21261

14 Site temperature up to 40 o C BSS Save energy 30% at site level On average at site level 30% of energy is used for cooling Varies from case to case. At hot climate 50% of energy is used for cooling By allowing BTS to run at higher temperature less energy used for cooling Use of fresh air cooling instead of air-condition at indoor and shelter sites Use of outdoor sites Energy consumption [W] Air Condition Fresh air cooling Daytime Traffic Traffic [Erlangs or Mbps] Slide 14 Low Traffic Time (00:00 24:00)

15 Discontinuous Transmission (DTX) BSS - BR Save energy by not transmitting during speech pauses Downlink output power is switched of during speech pauses On average half of non-bcch TRX time slots thus in idle mode DTX saves energy during daytime traffic For GSM BTS the saving is about 10% Energy consumption [W] DTX off Low Traffic Daytime Traffic DTX on Traffic [Erlangs or Mbps] BCCH TRX 2 TRX 3 TRX 4 BCCH TRX 2 TRX 3 TRX 4 Time (00:00 24:00) DTX off DTX on Slide 15 Feature ID(s): BSS01410

16 Radio Channel Allocation BSS - BR Save energy by moving traffic to BCCH TRX Prioritize BCCH TRX instead of traffic TRX and save enrgy As TS at BCCH TRX is anyway send with full power, energy can be saved by allocating traffic to BCCH TRX instead of traffic TRX No prioritization Prioritize for BCCH Saves energy during all traffic conditions. For GSM BTS the saving is about 20% Energy consumption [W] Low Traffic Daytime Traffic Traffic [Erlangs or Mbps] BCCH TRX 2 TRX 3 TRX 4 BCCH TRX 2 TRX 3 TRX 4 Time (00:00 24:00) No prioritization Prioritize BCCH Slide 16 Feature ID(s): BSS06115

17 Advanced downlink power control BSS - BR Optimize transmission power and thus save energy Variable Downlink Power Control This feature enables more aggressive power reduction steps for non-amr codec Thus BTS transmission power will reach the required minimum level much faster Progressive AMR Power Control This feature reduces the usage of highest output power levels by using robust codec instead of increasing output power On average downlink power control will save 2dB on BTS output power This will decrease BTS energy consumption by 4% Slide 17 Feature ID(s): BSS09021, BSS20776

18 Adaptive Multi Rate (AMR) BSS - BR Less bits over air less used energy AMR Half Rate (AMR HR) Within AMR HR one can reduce the amount of bits in voice call to half AMR HR is very powerful way to reduce energy consumption at big sites by having same traffic with less amount TRX HW and by having less active TS at non BCCH TRX. AMR Full Rate (AMR FR) Within AMR FR one can use lower BTS output power level as RX quality limits are lower for AMR FR than for GSM codes Enhanced TRX Prioritization in TCH Allocation Within this feature traffic without AMR support are allocated to BCCH TRX and traffic with AMR support to non BCCH TRX This will decrease energy consumption as with AMR traffic one need less output power than with GSM codes Slide 18

19 Power Saving Mode for BTS OPEX savings due to saved electricity RU In areas, which have multiple frequency layers, cells can be shut down during low load periods The Power Saving Mode (PWSM) grouping allows operator to control flexibly cell shutdown order according cell configuration and power amplifier mapping The cell shutdown is triggered once the operator conditions are met Shut down conditions include issues like time of the day, load of the cells, duration of low load, load can be fitted into remaining cells A shutdown cell is activated when traffic load in the active Slide cells 19increases Feature ID(s): RAN955

20 Slide 20 Thank you.