deploying lte 1800 mhz: discovering best...

1 © Nokia Siemens Networks 2013 Customer confidential

Deploying LTE 1800 MHz: discovering best practice

Customer Webinar

Kaia Ostonen

23 January 2013


Click here for full screen slides

Click here to complete the feedback survey and request follow up from your local account team

Click here to ask a question


Kaia Ostonen Mobile Broadband Business Unit, Value Creation Management

Kaia has been with Nokia Siemens Networks since 1999 and now focuses on 3G and 4G radio solutions. She has global experience of solution and business development, market/technology analysis, and marketing programs. Kaia holds an MBA in International Business Management from the European University in Geneva, Switzerland and a BBA from Tartu University, Estonia.


• Key drivers for LTE 1800 • Global outlook on LTE 1800 deployments • LTE 1800 spectrum requirement • Increasing GSM efficiency for refarming • Effective site evolution strategy • LTE 1800 performance • Lessons from the field


Drivers for LTE 1800

1. Demand for more cost efficient Mobile Broadband bandwidth

iPhone5 iPad MINI

Source: Nokia Siemens Networks

Example: HSDPA data volume in our networks (Europe, Asia), mid 2011-Oct 2012

2. Availability of large chunks of 1800 MHz band

3. Attractive devices supporting LTE 1800

4. Increasing utilization and monetization of 1800 MHz spectrum


700 MHz 800 MHz LTE

900 MHz 850 MHz GSM + HSPA

1800 MHz 1900 MHz GSM + LTE

2100 MHz 1700/2100 MHz HSPA (+LTE)

2600 MHz LTE / TD-LTE

Band Technology

2300 MHz TD-LTE

3500 MHz TD-LTE

Operating band

Band name

Total spectrum

Uplink [MHz]

850 MHz

1800 MHz

1900 MHz

900 MHz

Band II Band III

Band V Band VIII

2x25 MHz

2x75 MHz

2x60 MHz

2x35 MHz 824-849

1710-1785

1850-1910

880-915 869-894

1805-1880

1930-1990

925-960

Main 3GPP bands for refarming

Downlink [MHz]

34% of operators see LTE 1800 as their primary LTE band

1800 MHz is attractive for LTE: large allocation


• 76% of 1800 MHz operators have more than 10 MHz of spectrum

• 22% have allocation in multiple chunks but majority have at least 10 MHz of continuous spectrum: good opportunity for refarming

• Additional allocations of 1800 MHz spectrum are ongoing

70% of operators with 1800 MHz spectrum have good opportunity for LTE 1800 refarming

Source: Informa Aug. 2012 (202 operators), Nokia Siemens Networks analysis

25%

30% 21%

24%


LTE 1800 has coverage benefits, allowing cost-effective LTE deployment

10.0

9.2

4.0

3.2

1.9

1.3

0.0 2 4 6 8 10 12

EU800

900

1800

2100

2600 FDD

2600 TDD

km2

Typical coverage area of 3 - sector site in suburban area

LTE 1800 increases cell area by 2-3 times with 50-70% fewer sites compared to LTE2600

70MHz

1x coverage 2.6 GHz

Band 7

1800 MHz Band 3

75MHz 2x coverage


Strong ecosystem developing: 130 LTE 1800 devices are available across all categories

Routers, modules and Femto AP 67

Dongles 25

Smartphones 26

Source: GSA, Jan 2013

LTE 1800 devices include:

Tablets 8

• LTE 1800 included in recently launched flagship devices

• In 2012 number of LTE 1800 devices has doubled

Most LTE devices for Europe/Asia/Australia support LTE 800/1800/2600

Apple iPhone 5: LTE 1800 supported, only LTE band for Europe and ME

Nokia Lumia 920: LTE 1800 supported 5 LTE bands incl LTE800/2600

Recent launches: iPad 4, iPad MINI


Source: GSA , Jan 2013

• 58 commercial LTE 1800 networks

• Majority of all launched LTE networks are in 1800 MHz band:

• 40% of commercial networks (GSA, 08. Jan 2013)

LTE1800 progresses globally: 58 commercial networks in Europe, Asia, Middle-East, Africa and Australia


Poll question 1

What is the outlook for LTE 1800 in your network?

a) LTE 1800 is launched

b) LTE 1800 launch is planned within one year

c) LTE 1800 launch is planned more than one year from now

d) LTE 1800 implementation is not decided


LTE1800: 28 Nokia Siemens Networks deployments

Elisa Finland

Launched* Public 1800 Deal/ In deployment

*GSA & NSN 2012

LMT Latvia

TeliaSonera Finland

Telia Denmark

Optus Australia

T-Hrvatski Croatia du UAE

DT Germany

KT South Korea

Non-public 1800 Deal

Cosmote Greece

StarHub Singapore

Zain Saudi Arabia

SK South Korea

TMN Portugal

Polkomtel/Aero 2

Si.Mobil Slovenia

Tele2 Estonia

Tele2 Latvia

Tele2 Lithuania

Vodacom South Africa

Commercial Nokia Siemens Networks LTE 1800 networks

serve over 12 million LTE subscribers

Telenor Denmark

TI Italy


Three main spectrum strategies for LTE 1800

1) LTE 1800 single-band network LTE 1800 is the only launched LTE band

2) LTE 1800 primary band Multi-band LTE network with 1800 MHz as the primary LTE band for coverage and capacity

3) LTE 1800 secondary band Multi-band LTE network with LTE 1800 as an additional LTE band, for capacity or special requirements

Single-band networks

Multi-band networks


Spectrum characteristics

800 MHz 2x10 MHz

Frequency

Suitability for MBB

900 MHz 2x12.4 MHz

1800 MHz 2x20 MHz

2100 MHz 2x9.9 MHz

2600 MHz 2x20 MHz

Spectrum size

Available for LTE

Antenna syst impact

Rural coverage

Urban capacity

Indoor/ hotspot

Example: Operator in Europe

Propagation

1800 MHz band matches well a broad range of criteria for MBB deployment

1800 MHz spectrum is best suited to Mobile Broadband applications


• Key drivers for LTE 1800 • Global outlook on LTE 1800 deployments • LTE 1800 spectrum requirement • Increasing GSM efficiency for refarming • Effective site evolution strategy • Ensuring LTE 1800 performance • Lessons from the field


1800 MHz spectrum before refarming

Frequency Refarming in 1800 MHz band

= LTE = GSM after refarming

1800 MHz band

New Mobile Broadband experience added to “GSM band”

20 MHz

150 Mbps

15 MHz

110 Mbps 74 Mbps

10 MHz 5 MHz

37 Mbps

LTE carrier

Peak data rate

3 MHz

22 Mbps

1.4 MHz

9 Mbps

Questions: 1. Spectrum requirement for LTE 1800? 2. How much band is needed for GSM traffic? 3. Optimal LTE carrier bandwidth?

LTE


Spectrum requirement for LTE 1800 is smaller in coordinated scenario: when co-sited with GSM

LTE GSM LTE GSM

LTE carrier Coordinated case Uncoordinated case

LTE-GSM carrier-to-carrier spacing (from center of LTE to center of first GSM TRX)

20 MHz LTE (100 RBs*) 10.1 10.3

15 MHz LTE (75 RBs) 7.6 7.8

10 MHz LTE (50 RBs) 5.1 5.3

5 MHz LTE (25 RBs) 2.6 2.8

Coordinated scenario: GSM and LTE BTS co-sited

Uncoordinated scenario: GSM and LTE BTS not co-sited

*RB=Resource Block, smallest element of resource allocation by scheduler


Carrier-to-carrier spacing in the refarming deployment

10 MHz LTE carrier

10.6 MHz bandwidth to center of adjacent GSM TRXs

5.3MHz carrier-to-carrier spacing GSM TRX (200kHz)

Carrier-to-carrier spacing

Relative allocation (GSM – LTE)

5.3 MHz 200 kHz guard band between the nominal LTE 10 MHz band and 1st GSM TRX**

5.1 MHz 1st GSM TRX** adjacent to the nominal LTE 10MHz band

10 MHz LTE carrier

10.2 MHz bandwidth to center of adjacent GSM TRXs

5.1 MHz carrier-to-carrier spacing

Example: 10 MHz LTE carrier

Uncoordinated deployment* Coordinated deployment

Guard band (200kHz)

GSM TRX (200kHz)

*3GPP specification for UE/ eNB performance requirements and CEPT report 40 ** Closest GSM TRX must be non-BCCH TRX

• LTE bandwidth has inbuilt guard band

• NSN studies options to tighten carrier-to-carrier spacing in coordinated scenario


Example: evolving LTE 1800 refarming according to traffic take-up

GSM only: up to 16+16+16 @ 20% Half Rate

13 MHz

GSM LTE 5 MHz carrier

13 MHz

GSM 9+9+9 + LTE 5 MHz carrier

Up to 37 Mbps

GSM 16+16+16 Up to 0.6 Mbps

GSM 3+3+2 + LTE 10 MHz

carrier Up to 74 Mbps

LTE 10 MHz carrier

13 MHz

1.

2.

3.

GSM

GSM GSM


Typically LTE 1800 networks use 10 MHz bandwidth

150 Mbps

LTE peak rates

20 MHz 15 MHz 10 MHz 5 MHz 3 MHz 1.4 MHz

9 / 3 Mbps 22 / 7 Mbps

37 / 11 Mbps

74 / 23 Mbps

110 / 35 Mbps

150 / 47 Mbps

125 Mbps

100 Mbps

75 Mbps

50 Mbps

25 Mbps

LTE carrier bandwidth

downlink uplink

• Majority of Lte 1800 networks have 10 MHz LTE carriers

• Several operators have rolled out 20 MHz carriers in cities

• Up to 150 Mbps peak rates achievable with Cat 4 devices

• LTE 1800 networks with 5 MHz carriers are emerging in tight spectrum conditions


GSM software features allow compressing spectrum– Liquid Radio GSM Software Suite only from Nokia Siemens Networks

10 MHz LTE 4+4+4* GSM

capacity

GSM 3.8 MHz

Spectrum needed with NSN software features: 13.8 MHz

10 MHz LTE 4+4+4

GSM capacity

GSM 5.4 MHz

Traditional spectrum requirement: 15.4 MHz

Nokia Siemens Networks GSM Software Suite reduces the need for hardware capacity: for example capacity equalling 4+4+4 configuration is provided with 3+3+3 TRX and SW capacity features

Example: 5.1 MHz carrier spacing

Example: 5.1 MHz carrier spacing

GSM

GSM

Operator with 15 MHz of 1800 spectrum can deploy 10 MHz LTE in addition to 4+4+4 GSM capacity with Nokia Siemens Networks Liquid Radio GSM Software Suite


Liquid Radio GSM Software Suite facilitates refarming

• 30% more GSM spectrum can be allocated to LTE • Capture more Mobile Broadband Revenue • Same GSM service quality

GSM LTE GSM

Software Suite

Maintained GSM quality in less

spectrum

Benefit Liquid Radio GSM Software Suite features

Performance gain

GSM Voice efficiency

Orthogonal Sub-Channel (OSC) (Dual Half Rate voice codes)

30% - 50% more traffic

GSM Data efficiency

Smart Resource Adaptation (SRA) Up to 5x more data users

GSM Signalling efficiency

Precise Paging (PP)

Up to 70% less signalling for paging

Capacity Dynamic Frequency and Channel Allocation (DFCA)

40% spectrum reduction with same traffic and higher quality

4 users per TSL

OSC0

OSC1

1 resource for small packets


LTE 1800 operators have also commonly refarmed U900 Case example: Operator in APAC

Increase in 3G data

Dramatic decrease in 2G data

• Heavily loaded 2G/3G network • Our customer refarmed its 900 MHz frequency to

3G and1800 MHz to LTE • Operator’s objective: better smartphone data

coverage, no decrease in voice performance • Excellent results:

• Increased 3G indoor coverage from 75% to 95%

• 3G data volumes increased by 10% to 15% • 2G data volume decreased • Maintained voice performance:

• Ave GSM voice accessibility improved • Blended 2G/3G Dropped Call Rate was

unchanged

NSN customer refarming U900/L1800: • Before refarming: 8.2 MHz G900, 15 MHz

G1800 • After refarming:

4 MHz G900 (+WCDMA900), 5 MHz G1800 (+10 MHz LTE 1800)


Poll question 2

How important are GSM efficiency features (AMR HR, OSC, DFCA) in your network?

a) Same importance as today

b) Becoming more important over the next 1-2 years

c) Becoming less important

d) Not sure

Dept. / Author / Date


RF Sharing is implemented or planned in majority of LTE 1800 networks Example: 3-sector site with GSM - LTE RF sharing

• Flexi Multiradio BTS allows efficient LTE refarming: • Only a single Flexi RF Module for a

3-sector GSM-LTE radio • RF output power 3 x 80W per module

is shared between GSM and LTE • GSM-LTE share both RF Module and

Antenna line • GSM-LTE RF sharing features

(RL20, LTE447; BSS21520)

Single RF module for 3-sector GSM-LTE site


Different site solutions have been required in refarming

2x 3-sector RF Modules GSM/LTE 2x2 MIMO System Modules: GSM, LTE

2x 3-sector RFMs GSM/LTE 2x2 MIMO

System Modules: GSM, LTE

System Modules: GSM, LTE

80+80W per sector

80+80W per sector

60+60W per sector

1. Flexi BTS: stacked configuration

2. Flexi BTS: distributed configuration

3. Flexi BTS: with RRHs

RF Modules next to antennas: improved RF performance, no MHA needed


0.6 Mbps peak throughput

Site evolution to high capacity Mobile Broadband

RF (1800)

GSM: 4+4+4 15-20W/TRX LTE: 20 MHz with MIMO

GSM site

System module

RF (1800)

System module

System module

RF (1800)

System module

System module

GSM: 4+4+4 15-20W/TRX LTE: 20 MHz with MIMO

Re-using antennas and antenna-line

1. 3. 2.

Example

450 Mbps peak throughput 20 MHz LTE 160 W per sector

450 Mbps peak throughput 20 MHz LTE 240 W per sector


LTE 1800 refarming: Effective reuse of existing assets (CAPEX)*

*)Network with 2000 Sites / 1.6Mio Subscribers / 7000€ additional site construction without 1800 MHz

Without 1800 MHz With 1800 MHz Additional costs without refarming: • Site construction • Adding RF modules and antennas

• LTE 1800 CAPEX advantages • Reusing RF units • Reusing Antennas • Reusing existing spectrum

35% lower CAPEX when reusing assets


Low site impact affects rental fees (OPEX)*

With 1800 MHz Without 1800 MHz

16% lower OPEX when rental re-negotiations can be prevented

*)Network with 2000 Sites / 1.6Mio Subscribers / 3000€ additional annual rental cost

Increased rental fees

Lte 1800 OPEX advantages • No need to re-negotiate lease

contracts • Minimal civil works on site • Reusing Antennas


6-step approach to LTE Frequency Refarming

Strategy definition for GSM refarming

GSM, LTE Network assessments

GSM Optimization

Deploying LTE 1800 network

GSM, LTE multilayer optimization

Continuing optimization

NetAct Optimizer has proven to be a vital tool when refarming frequencies from GSM to LTE

Multiradio LTE1800-GSM1800

Unique GSM features LTE software features

• AMR enhancements

• OSC • DFCA • SRA • PP

• Dual band & optimized load balancing features

• Compact site solution with concurrent GSM-LTE RF mode

LTE GSM after refarming

LTE

With more than 35 refarming projects already delivered, Nokia Siemens Networks is the leader in refarming services


Optimization improves GSM performance during frequency refarming • Nokia Siemens Networks network planning professionals are experienced in

refarming - speeds up the refarming process • Refarming tools include NetAct Optimizer and Nokia Siemens Networks

service expertize are key for successful refarming • NetAct Optimizer performs very accurate frequency allocation

KPIs Before refarming (17.5 MHz)

After refarming (12.5 MHz)

% TCH Drop 0.81 0.66

% SDCCH Drop 0.77 0.63

% Handover Success Rate

97.65 98.28

UL RX-Qual Class 0-4

< 97.25% 98%

Refarming case: example from Asia

• 5 MHz refarmed from fully used GSM network with equipment from Nokia Siemens Networks and Ericsson

• GSM performance improvements recorded in drop call ratio, handovers and call quality


LTE 1800 performance: Optus Australia LTE 1800 network the winner in network speed tests in Sydney

• Optus launched LTE in Sept 2012 in major Australian cities

• 10 MHz 1800 Spectrum refarmed from GSM • Independent benchmark (Oct. 2012)

• Optus has the best data speeds in 11 out of 13 locations

• Optus LTE network is denser than Telstra’s in Sydney (Sun Herald newspaper, 14. Oct 2012), speed test application with iPhone5)

• Nokia Siemens Networks is Optus’ LTE vendor in Sydney

• LTE with Flexi Multiradio BTS: using existing sites and antenna sharing

• Australian market: • Telstra 13.8 mn total subscribers, Optus 9.5 mn, VF 6.8 mn • Telstra’s 4G network launched Sept 2011, LTE 1800 (2x10

MHz), VF plans LTE launch in 2013


Drive tests in LTE 1800 network in Telia Denmark

• Typical latency: below 20ms • Typical data throughput: 45 Mbps

Telia Denmark: world’s first large GSM/LTE 1800 network with concurrent mode operation in Flexi RF modules Drive test measurements, suburban area 5km from central Copenhagen, including highway 10 MHz bandwidth in LTE 1800 MHz, commercial network, Oct. 2011

“With the help of the Multiradio we could share the spectrum and launch LTE on a lot of [existing] sites ... The effort NSN has added was perfect. Our Customer feedback was extremely good. They were very very surprised by the performance.” Franz Voglhofer, Radio Network Expert, Telia Denmark


LTE 1800 lessons

1. LTE 1800 can serve as the main LTE band or support multi-band strategy 2. Nokia Siemens Networks efficient GSM features compress GSM traffic, maintaining quality 3. Majority of operators roll out LTE 1800 with 10 MHz or wider LTE carrier

performance differentiation vs HSPA networks

4. Many operators refarm U900 and LTE 1800 simultaneously only single planning effort for GSM

5. RF sharing (GSM and LTE sharing an RF Module) ensures optimal site solution Flexi RF Module supports up to 35 MHz Tx bandwidth Where spectrum is fragmented, LTE 1800 diplexer can be used

6. Network optimization before and after LTE 1800 rollout leads to the best performance

GSM syst module

LTE syst module

GSM/LTE 1800 RF

GSM /LTE 1800 RF

Flexi Multiradio BTS with 3x80W RF module: Higest integration level in the market Outdoor capable IP65


LTE 1800 refarming summary

• Efficient LTE solution: unique compact Flexi Multiradio site and features for refarming

• Maintained GSM performance with advanced features in Liquid Radio GSM Software Suite

• In-depth experience in re-farming specific services including planning, optimization, consulting enabling smooth rollout

Drivers of LTE 1800 • Available spectrum • Low impact on existing RF plant and antennas • Opportunity to monetize 1800 MHz spectrum with

mobile broadband revenue • Attractive devices: iPhone 5, iPad 4, Lumia 920 …

28 Nokia Siemens Networks references in LTE 1800


Q A

&


• Download the presentation from the download tab • A recording of the webinar will be available within a few hours • Please answer our short feedback survey

43 © Nokia Siemens Networks

Click here to complete the feedback survey and request follow up from your local account team


The webinar has now ended Please complete the feedback survey The recorded ‘on demand’ version will be published in about two hours Thank you, see you again soon


Under study: possibility to tighten carrier spacing

• Nokia Siemens Networks studies the option of tighter carrier spacing (GSM TRX in the nominal LTE carrier space)

• 3GPP specification requires LTE devices to tolerate blocking signal > 200 kHz offset from LTE carrier edge: – No device specification for narrower carrier spacing – Evaluation of performance of LTE devices and chipsets is ongoing

• With carrier separations below 5.1 MHz (for 10 MHz carrier) the impact of interference may become visible, depending on multiple factors incl: – Type of deployment, additional software features, network parameters and

optimization, implementation of filters, geographical user distribution, network load etc. • With deployment considerations and new software features on GSM and

LTE side the interference can be reduced: – Features to allow narrower carrier-to-carrier spacing are study items for RL50

and future GSM releases

LTE UE

1 2 3

4

GSM + LTE BTS/eNodeB

GSM MS


46 © Nokia Siemens Networks 2013

Canada Canada Denmark Finland Sweden Sweden China South Korea

TD-LTE large-scale deployments

USA USA Denmark Finland Latvia Latvia Russia South Korea

TD-LTE

USA USA Germany Germany UK Estonia Estonia India Singapore South Korea

IMS

Croatia France Austria Poland Lithuania Azerbaijan Philippines Japan

Brazil Italy Slovenia Greece UAE Bahrain Australia Japan

Brazil Spain Portugal South Africa Saudi Arabia Saudi Arabia Guam Japan

TD-LTE

TD-LTE TD-LTE TD-LTE

70 LTE radio deals (incl. 11 TD-LTE) 36 LTE EPC deals

commercially launched networks (incl. 6 TD-LTE)

44

Nokia Siemens Networks LTE references 77 commercial LTE customers


47 © Nokia Siemens Networks 2013

We are LTE supplier to 44 commercial LTE operators that serve 45% of all LTE subscribers

Canada Canada Denmark Finland Sweden Sweden South Korea

USA USA Finland Latvia Russia South Korea

USA Brazil Germany Germany Estonia Estonia India Singapore South Korea

Croatia Austria Poland Philippines Japan

Italy Slovenia Greece UAE Australia Japan

Portugal South Africa Saudi Arabia Saudi Arabia Guam Japan

• 77 commercial LTE network contracts

• on 6 continents • on 11 frequency bands

• Experience from most advanced markets like Korea, Japan and Northern Europe and North America

Note: “commercial LTE operators” = operators who have already commercially launched LTE service

TD-LTE radio EPC

TD-LTE radio EPC

radio

radio EPC

radio EPC

radio EPC radio EPC

radio

radio

radio

radio

radio

2.5mn subs (Sept. 2012)

7.4mn subs (Nov. 2012)

6mn subs (Oct. 2012)

3.6mn subs (Sept. 2012)

radio EPC TD-LTE radio

radio EPC

radio EPC radio

radio

radio radio

radio

radio

radio

radio

radio

EPC radio radio radio

radio radio

radio EPC

TD-LTE radio EPC IMS

radio EPC

radio radio

EPC

radio

radio

EPC


GSM spectrum requirement

Re-use assumption

+FH 14 BBCH, 6 TCH +AMR 12 BBCH, 5 TCH +DFCA 12 BBCH, 3 TCH

GSM bandwidth requirement (MHz) Number of TRX per cell

GSM FH AMR DFCA

1 3 2.8 2.4 2.4

2 5.4 4 3.4 3

3 7.8 5.2 4.4 3.6 4 10.2 6.4 5.4 4.2

5 12.6 7.6 6.4 4.8

6 15 8.8 7.4 5.4

Bandwidth of 3+3+3 configuration reduced from 7.8 MHz to 3.6 Mhz with DFCA

GSM 15 BBCH, 12 TCH

• FH, AMR HR and OSC are the most common features implemented • DFCA and especially DFCA + OSC allow most aggressive spectrum compression

49 © Nokia Siemens Networks 2013 Customer confidential Used as fast data layer LTE 2.6GHz/2.3GHz

Used mainly as voice layer and for coverage GSM 900

Used as capacity layer for voice or data on EGPRS GSM 1800/1900

Used as mainly as data coverage extension layer for HSPA users UMTS 900/850

Used as data/voice capacity layer for HSPA capable users UMTS 2100

Multilayer Network

How to use the LTE 1800 layer in a mature network? Possible Scenarios

Knowing where and how to route traffic is fundamental to

get the best network performance.

Nokia Siemens Networks Network Planning is the right

choice for achieving the desired QoS Femto Pico DAS

Micro Pico DAS Femto

DAS

LTE 1800 Used as coverage or capacity layer

LTE 800 Used mainly as coverage layer for fast data

DAS

DAS

Micro Pico DAS

DAS

Micro

http://it.wrs.yahoo.com/_ylt=A0WTf2zijX5LqSAABh8dDQx.;_ylu=X3oDMTBqYWdlNjBlBHBvcwMxOARzZWMDc3IEdnRpZAM-/SIG=1gcht80ni/EXP=1266671458/**http:/it.images.search.yahoo.com/images/view?back=http://it.images.search.yahoo.com/search/images?p=layers&ei=utf-8&fr=sfp&w=351&h=500&imgurl=www.jittersevents.com/blog/wp-content/uploads/2009/07/layers.jpg&rurl=http://www.jittersevents.com/blog/page/2&size=19k&name=layers&p=layers&oid=9572857859a55348&fr2=&no=18&tt=2184396&sigr=1188tis0u&sigi=120up2uja&sigb=128h30c1o&type=JPG�


Flexi RF Module: capable to cover a wide spectrum RL40: FXEB 3x80 W

35 MHz TX BW 60 MHz RX BW

LTE: FSMD/E GSM: ESMB/C

50 MHz

LTE

FXEB

FXEB

2TX sectors: 1 2 3

20 MHz GSM GSM

35 MHz FXEB BW

3-sector BTS: LTE 40+40 W

20 MHz 2TX MIMO and

GSM 4+4+4 @ 20 W

Example: 50 MHz spectrum for GSM & LTE

1710-1745 MHz

1720-1755MHz RFM2

RFM1


Same Band Diplexer is effective with scattered spectrum

• 1800 Same Band Diplexer (SBD) further increases our site capacity by minimizing combining losses

• Allows antenna re-use • SBD can combine:

– up to 4 Tx to 2 antenna feeders – legacy 2G BTS (2 Tx) with LTE MIMO BTS

Flexi Multiradio BTS with RF Module 3x80 W ; LTE 2x2 MIMO, RF sharing LTE and GSM

GSM SM

GSM 1800 RF

GSM/LTE 1800 RF

LTE SM

GSM/LTE 1800 RF

SBD (1 sector)

1710-1745 MHz

1720-1755MHz RFM2 RFM1

RFM3 1760-1785 MHz

Example: 1710-1713=3 MHz for GSM 1725-1745=20 MHz for LTE MIMO 1750-1752= 2MHz for GSM 1770-1779=>9 MHZ for GSM

deploying lte 1800 mhz: discovering best...

Documents