ADC FWM1901A User Manual

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nanoGSM™

GSM-over-IP picocells for in-building
coverage and capacity

increased data capacity

For many of the new data services the majority of use will be
indoors where the EDGE BTS will be physically close to the user.
The quality of the signal can be correspondingly higher, so the
higher rate data coding schemes will be available to the user. The
nanoBTS EDGE/AMR supports all the EDGE coding schemes from
MCS1- MCS9 giving a maximum nominal data rate of 414kpbs
which is up to three times the maximum data rate of the
GSM/GPRS model. The BTS also monitors for the optimum RF
conditions for data transfer and alters the data throughput to
achieve the fastest rates This ensures the best possible user
experience and maximizes the use of the available spectrum.

improved voice quality and capacity

In networks where AMR capable handsets are being deployed the
new coding scheme can be used to improve the quality of voice
calls, improving the user experience. In addition, as the quality of
the AMR half rate coding is very similar to the standard full rate
GSM, half rate AMR can be used to double the number of voice
channels available per BTS. Erlang models show that this
increases the number of supported users by up to three times,
improving the return on investment for the BTS.

easy deployment

Picocells offer a lower cost alternative to the traditional antenna
based approach to providing GSM coverage and capacity within
buildings. Due to the small size and deployment flexibility, the
nanoBTS can easily achieve coverage where needed. The quick
and simple installation using existing Ethernet wiring for both data
and power avoids the need for the expensive site surveys, cabling
installations and access to roof and floor spaces typical of
distributed antenna systems (DAS). The unique Network Listen™
function supplements the conventional RF planning process,
allowing the planners to see into the difficult indoor environment to
optimize the coverage.

For operators with existing nanoBTS deployments the EDGE unit
can be added to an existing installation using the multi TRX
capability. Both units then operate as a single cell to give up to 22
channels of voice together with the high data rates of 414kbps of
the highest EDGE coding schemes.

nanoBTS™ EDGE/AM

The new nanoBTS EDGE/AMR picocellular basestation
represents a significant step on the migration path to higher
data rates and more supported users. Based on the world
beating nanoBTS GSM/GPRS basestation it delivers the same
features and functionality for GSM voice and GPRS but with
the addition of high-speed EDGE data and improved voice
quality and capacity using AMR coding.

For operators moving to higher speed data networks by
deploying EDGE, there is a strong requirement to provide high
quality coverage in buildings. With ip.access revolutionary
GSM-over-IP technology it is possible to bring cost effective
high-speed coverage to the user where they most need and
use it.

key features

 Up to 3 times the data rate with EDGE support
 Up to 3 times the number of supported users with half rate

AMR

 Support for EDGE coding MCS1-MCS9
 Indoor coverage up to 125,000m
 Single 10/100 Ethernet connection
 Smallest footprint in the industry

applications

 Dedicated coverage for SME premises
 In-building capacity and coverage for large corporate

offices

 Stand-alone in-fill for shopping malls, airports or

undergrounds

 Delivering GSM access on ships, aeroplanes and rural

areas

scalable system architecture

The nanoBTS is a complete GSM basestation that conforms to the
picocell standard and delivers “GSM-over-IP”. It combines a
standard U
GSM handsets in use globally, with an IP based backhaul, which
can take advantage of the existing IP broadband infrastructure.

There are two versions of the nanoBTS EDGE/AMR for operation in
the 1800 and 1900MHz GSM frequency bands. For applications
requiring even greater capacity up to 4 nanoBTS can be combined
into a multiple TRX cell, increasing the number of supported users
per TRX by up to 200%.

The nanoBTS GPRS/GSM and the nanoBTS EDGE/AMR are
controlled by the nanoGSM BSC basestation controller. System
configuration, performance and fault reporting is handled by the
nanoGSM OMC-R management system.

air interface, which supports the more than 1 billion

m

2

technical specification

Um radio interface

transmit frequencies

GSM 1800 model.............................. 1805 to 1880MHz

GSM 1900 model.............................. 1930 to 1990MHz

Channel spacing .............................................. 200kHz

Max. output power:

GMSK (CS 1-4/MCS 1-4) ................................ +23dBm

8PSK (MCS 5-9) ..............................................+13dBm

Static power control ........................ 6 steps (2dB each)

Dynamic power control ....................6 steps (2dB each)

receive frequencies

GSM 1800 ........................................ 1710 to 1785MHz

GSM 1900 ........................................ 1850 to 1910MHz

Channel spacing ............................................... 200kHz

Performance .............................................. GSM 05:05

Gain control steps .................................................... 26

internal aerials

Separate antennas for TX, RX and NetworkListen™
0dBi omni-directional (nominal)
External aerial connections (optional)

channel support

Each nanoBTS supports a single TRX and can act as a

standalone BTS

Up to 4 nanoBTS can also be connected to act as a Multi-TRX

BTS

Single TRX or C0 of MultiTRX

TS0 = full BCCH, Combined BCCH or Combined BCCH with

CBCH
TS1-7 = TCH(full or half rate), PDCH or Dynamic PDCH/TCH
Additionally TS1 may be SDCCH/8 + SACCH/C8 (with optional

CBCH)

Multi TRX (non C0)

TS0-7 = TCH(full or half rate)
Additionally TS1 may be SDCCH/8 + SACCH/C8

Internal clock frequency

Better than 100ppb as per GSM 05.10 pico

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user services

encryption support

A5/1
A5/2

circuit switched data

Single slot BS20 at up to 14.4kb/s
BS21-26, plus BS61, BS81

GPRS support

Coding schemes CS1-4
Multi-slot class 10
Dynamic PDCH for optimising mix of service for voice/data

E-GPRS support

Modulations coding schemes MCS1 -9
Link adaptation
Incremental redundancy

Interface connection

signalling and traffic .......................................... Abis/IP

Single RJ45 auto-negotiate 10/100 Ethernet supporting PoE
Timing Interface Bus (TIB) providing nanoBTS interconnect for

multi-TRX functionality

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physical

dimensions and weight

Height ...............................................................205mm

Width ................................................................ 275mm

Depth. ................................................................ 63mm

Weight .....................................................................2kg

power

Power consumption .............................................. 13W

Input supply ...........................................38 - 50 volt DC

Power over Ethernet (PoE)

operational

Temperature ............................. -5°C to +45°C ambient

Humidity............................... 5% - 90% non-condensing

teleservices

Telephony
Short Message Service MT/PP
Short Message Service MO/PP
Short Message Service CB single message for user cell

description

speech format support

GSM FR and EFR
AMR (TCH_AFS and TCH_AHS)

Copyright © ip.access 2005. nanoGSM and nanoBTS are trademarks of ip.access ltd. All other trademarks are acknowledged. This document contains advance information, subject
to change without notice. No responsibility is assumed by ip.access for the use of this information, nor for infringements of patents or other rights of third parties. This document is
the property of ip.access and implies no license under patents, copyrights or trade secrets. No part of this publication may be copied, reprod uced, stored in a retrieval system, or
transmitted, in any form of any means, electronic, photographic, or otherwise, or used as the basis for manufacture or sale of any items without the prior written consent of ip.access.

ip.access ltd

CPC1 ■ Capital Park ■ Fulbourn ■ Cambridge ■ CB1 5XE ■ UK

T [phone] ■ F [phone] ■ [e-mail]
www.ipaccess.com

standards

CE marked
UL and FCC listed

mounting

The nanoBTS EDGE/AMR is provided with a mounting bracket.
For multi TRX a second BTS can be mounted on top of the first
Power-over-Ethernet can be provided locally using the supplied

Ethernet inserter or remotely using a PoE switch