Européenne de Télécommunications S.A.©2000 - 19/01/2000 - Anthony NAZARRE http://www.etsa.fr -
[email protected] - fax:+33(0)2.47.49.22.23 - tél.+33(0)2.47.55.40.50 N°1
GSM 900 & 1800 MHz repeaters : design, engineering and network integration 0- Introduction 1- Repeaters purpose 2- Repeaters : design & fundamentals 3- Network integration: different configurations 4- Conclusion: coverage vs. capacity 5- Questions & Answers
Européenne de Télécommunications S.A.©2000 - 19/01/2000 - Anthony NAZARRE http://www.etsa.fr -
[email protected] - fax:+33(0)2.47.49.22.23 - tél.+33(0)2.47.55.40.50 N°2
REPEATERS Purpose: extending cell coverage (outdoor)
BTS location
BTS location
Blind zone
Covered zone
Repeater
Covered zone
Européenne de Télécommunications S.A.©2000 - 19/01/2000 - Anthony NAZARRE http://www.etsa.fr -
[email protected] - fax:+33(0)2.47.49.22.23 - tél.+33(0)2.47.55.40.50 N°3
REPEATERS Purpose: extending cell coverage (indoor)
Repeater Repeater
Tunnel
BTS
Building
Européenne de Télécommunications S.A.©2000 - 19/01/2000 - Anthony NAZARRE http://www.etsa.fr -
[email protected] - fax:+33(0)2.47.49.22.23 - tél.+33(0)2.47.55.40.50 N°4
REPEATERS Purpose: extending cell coverage (indoor) RF level
Repeater gain Building losses distance from BTS
operational threshold of mobiles
radius gain
BTS indoor covered zone BTS location BTS outdoor covered zone
area covered by picorepeater
Européenne de Télécommunications S.A.©2000 - 19/01/2000 - Anthony NAZARRE http://www.etsa.fr -
[email protected] - fax:+33(0)2.47.49.22.23 - tél.+33(0)2.47.55.40.50 N°5
REPEATERS
• Advantages – Cheaper than a BTS – Easier installation
• Drawbacks – Interference – Noise – Problem of traffic
Européenne de Télécommunications S.A.©2000 - 19/01/2000 - Anthony NAZARRE http://www.etsa.fr -
[email protected] - fax:+33(0)2.47.49.22.23 - tél.+33(0)2.47.55.40.50 N°6
REPEATERS: different types
• Channel-selective repeaters – High gain & output power/channel – No frequency hopping
• Band-selective repeaters – Medium gain & output power – Indoor environments
• Wide-band repeaters – Medium gain & output power – indoor environments – low cost
Européenne de Télécommunications S.A.©2000 - 19/01/2000 - Anthony NAZARRE http://www.etsa.fr -
[email protected] - fax:+33(0)2.47.49.22.23 - tél.+33(0)2.47.55.40.50 N°7
REPEATERS - general performances SELECTIVE-CHANNEL REPEATERS
Gain Power NF Group delay Weight Cost
SELECTIVE-BAND REPEATERS
WIDE-BAND REPEATERS
60-90 dB aW ~10 dB a 10µs a 10 kg
40-60 dB a 100 mW ~12 dB a µs ~1 kg
40-60 dB a 10 mW ~8 dB a 100 ns ~500 g
‘‘ ‘
‘‘
‘
Européenne de Télécommunications S.A.©2000 - 19/01/2000 - Anthony NAZARRE http://www.etsa.fr -
[email protected] - fax:+33(0)2.47.49.22.23 - tél.+33(0)2.47.55.40.50 N°8
REPEATERS - general synoptics downlink A DX
AGC
DX
A uplink A
A
1-channel-selective
2- band-selective
A 3- wideband
Européenne de Télécommunications S.A.©2000 - 19/01/2000 - Anthony NAZARRE http://www.etsa.fr -
[email protected] - fax:+33(0)2.47.49.22.23 - tél.+33(0)2.47.55.40.50 N°9
REPEATERS - Automatic Gain Control (AGC) Zone covered by a picorepeater
AGC ON Maximum output power +13dBm Reduced gain
R
≈10-12m* ≈ 10-200m*
AGC OFF Maximum gain +50dB
* depending on the kind of delivery antenna, on building and propagation environment
Européenne de Télécommunications S.A.©2000 - 19/01/2000 - Anthony NAZARRE http://www.etsa.fr -
[email protected] - fax:+33(0)2.47.49.22.23 - tél.+33(0)2.47.55.40.50 N°10
REPEATERS - E.T.S.A. solutions
Band-selective & wideband picorepeaters (GSM 900 & 1800 MHz) Channel selective repeater (V/UHF bands)
Européenne de Télécommunications S.A.©2000 - 19/01/2000 - Anthony NAZARRE http://www.etsa.fr -
[email protected] - fax:+33(0)2.47.49.22.23 - tél.+33(0)2.47.55.40.50 N°11
PICOREPEATERS - stand-alone configuration Directionnal donor antenna towards BTS
Pico repeater
BTS
Broadcastingdelivery antenna
Decoupling > 65 dB • AGC in uplink direction • 30 dB dynamic range • very high speed to authorize gain variation between time slots
variable distance ( 2-100m )
Building
Européenne de Télécommunications S.A.©2000 - 19/01/2000 - Anthony NAZARRE http://www.etsa.fr -
[email protected] - fax:+33(0)2.47.49.22.23 - tél.+33(0)2.47.55.40.50 N°12
PICOREPEATERS - Basic network configuration (1) Directionnal donor antenna towards BTS Current injection unit Common power supply unit
R Level 4 splitters
R R
BTS
Broadcasting Level 3 -delivery antennas Level 2
PicoRepeaters
R Level 1
Building
Européenne de Télécommunications S.A.©2000 - 19/01/2000 - Anthony NAZARRE http://www.etsa.fr -
[email protected] - fax:+33(0)2.47.49.22.23 - tél.+33(0)2.47.55.40.50 N°13
PICOREPEATERS - Basic network configuration (2)
R
PicoRepeaters
Level 5
R splitters
R
Broadcasting Level 4 -delivery antennas Level 3
Current injection unit
R Level 2
Common power supply unit µBTS
coupler Level 1
Building
Européenne de Télécommunications S.A.©2000 - 19/01/2000 - Anthony NAZARRE http://www.etsa.fr -
[email protected] - fax:+33(0)2.47.49.22.23 - tél.+33(0)2.47.55.40.50 N°14
REPEATERS - Distributed energy & levels µBTS -83 / -53 dBm 40 dB coupler -43 / -13 dBm feeder loss 4dB
mobile located at a variable distance (up to 100 m, depending on the kind of delivery antenna and on the kind of environment
-39 / -9 dBm division ratio 1:4 -37 / -7 dBm feeder loss 4dB -33 / -3 dBm division ratio 1:3 feeder loss 4dB
-28 / +2 dBm -24 / +6 dBm
division ratio 1:2
path losses max min repeater gain -15 / +15 dBm 50dB / 35 dB -18 / +12 dBm feeder loss 3dB
input power -65 dBm / -20 dBm
Repeater
Européenne de Télécommunications S.A.©2000 - 19/01/2000 - Anthony NAZARRE http://www.etsa.fr -
[email protected] - fax:+33(0)2.47.49.22.23 - tél.+33(0)2.47.55.40.50 N°15
REPEATERS - Conclusion 1- Coverage-Capacity-Quality Networks optimisation 2- E.T.S.A. adaptable solutions : picorepeaters range 3- E.T.S.A. audit, consulting & technical support
