Small cell

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Overview of Fundamental Technologies

Why CDMA2000 at 450 MHz is such an attractive Proposition

Coverage & Scalability Driven by Frequency Band - 450 MHz

1x&DO BTS

1x&DO BTS

NormalizedCell Count • 450 MHz = 1 • 850 MHz = 3 • 1900 MHz = 13 • 2100 MHz = 16

1x&DO BTS

1x&DO BTS

1x&DO BTS

850 MHz =29 km (2,642 km2)
1x&DO BTS

450 MHz = 49 km (7,543 km2) &DO
1x&DO BTS1x&DO BTS

1x&DO BTS

1x&DO BTS

1x&DO BTS

1x&DO BTS

Sources: www.cdg.org,
2 | CDMA & 450| March 2011

All Rights Reserved © Alcatel-Lucent 2006, #####

1x&DO BTS

1x&DO BTS

&DO1x&DO BTS

1x&DO BTS

Capacity in 450 MHz Spectrum - Today
450
EMEA CALA China
UL / DL

450 460 478 488

- 467 - 467 - 486 - 496

Initial Analog (TACS, AMPS etc.) • Were cumbersome •Incompatible between counties • Spectrally inefficient • Lacked any high speed data capabilities • Limited to 5 MHz
4.5 MHz

NMT phone with a keyboard / display unit

In 5MHz CDMA can support 234Erlangs per site or 7,800 users

21 Analog Control Channels (2.63 kHz)

338 Analog Voice Channels (4.225 MHz) (Legacy NMT Analog Voice)

NMT (7/21 Reuse) could support approx 10.8 Erlangs persite or 360 users
(NMT MoU Digital Interest Group 06/03)

MC EV-DO
1X = 26E Voice
1.25MHz

Guard Band

Guard Band

1x&DO BTS

&DO

21 Analog 85 Analog 1X or EV-DO Control Voice ChannelsChannels (2.63 kHz) (1 MHz) 1.25MHz

185 Analog 1X or EV-DO Voice Channels (2.3 MHz) 1.25MHz

1X or EV-DO
1.25MHz

DO = 3.1 /1.8 Mbps
1.25MHz

Sources: www.cdg.org,
3 | CDMA & 450| March 2011All Rights Reserved © Alcatel-Lucent 2006, #####

Capacity in 450 MHz Spectrum - Voice Tomorrow

Up to 4x 1X Capacity

DO = 3.1 /1.8 Mbps
1.25MHz

1X = 26E Voice
1.25MHz

1X AdvancedCapacity/Coverage Improvements • Improves call quality and reduce call drop rate for those calls that are RL limited • Reduces required transmit power of the existing and new mobiles • Reduces cell...
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