Gren tech outdoor coverage solutions

国人通信
GRENTECH
GrenTech Outdoor Coverage Solution

Copyright © Shenzhen Grentech Co., Ltd.
OUTDOOR COVERAGE SOLUTION
Importance of Outdoor / Rural Coverage

1: Large and open Area
2: Population density small
3: Single area traffic( Erl ) is low
4: Power supply is difficult
5: People need communication
With modern communication
device
Rural area’s Situation
1: BTS and civil work cost
2: Transmission cost
3: Power consumption cost
4: Construction time is long
5: Investment return slow and low
6: Operators need expansion of
there Service and market
Operators’ Consideration
HOW

1、Outdoor Repeater Solutions
2、MCPA (Multi-Carrier Power Amplifier)
3、Digital Optical Fiber Multi-band RRU
How to make “?” To “!”

OUTDOOR REPEATER SOLUTIONS
1.1 RF Outdoor Repeater Solutions
The output power of repeater is: 10W(40dBm), 20W(43dBm)

In order to avoid self oscillation, Must
ensure isolation between donor and
service antenna have a safe distance.

1.2 ICS (Interference Cancellation System) Outdoor Repeater

ICS Repeater can solve isolation problem, can be easily installed
and commissioning. Output power :10w(40dBm);20w(43dBm)

1.3 Optical Fiber Outdoor Repeater Solutions
The output power of repeater is: 10W(40dBm), 20W(43dBm)
RU
MU
Fiber

BS
Coupler
Attenuation
Master unit
Remote unit
Optical Fiber Repeater running stably,signal transmission from MU
to RU can reach 20 KM. Output power :10w(40dBm);20w(43dBm)

MCPA SOLUTION
2. MCPA
What do we face ?
Problem one:
With the rapid development of the network, the
original network coverage shrinks because of the
large-scale network expansion and upgrade, so it is a
challenge how to keep the original coverage faster
and low-costs
Problem two:
It is hard to extend BTS coverage in some rural and
mountainous area where has no right conditions to
build more BTS

MCPA SOLUTION
Traditional solution

MCPA SOLUTION
Our Solution
BTS Combiner + MCPA

MCPA SOLUTION
 Extend the downlink coverage
 Improve the balance of link

MCPA SOLUTION
MCPA
BTS
Antenna
MCPA
BTS
BTS room
Antenna
BTS room
Indoor type Outdoor type

Depth coverage for dense urban area
MCPA SOLUTION
 Blind zone
 Hard to set new BTS
 Long construction period
 Extend BTS coverage
 Beautify the urban environment
 Rapid deployment

High way and railway coverage
MCPA SOLUTION
Ribbon zone coverage ,special on road and railway where user is at a
high speed call, and requirements for the network coverage and call quality
are higher
 Extend the BTS coverage
 Reduce the drop line
 Reduce the BTS signal switch
 Improve call quality

Coastal and inland waterway
MCPA SOLUTION
 Poor environment
 Irregular Panhandle
 High signal loss
 Reduce investment
 Emergency use

Village and township
MCPA SOLUTION
 Low BTS efficiency
 less coverage
 hard to build new BTS
 Reduce investment
 High Performance-to-Price Ratio

Digital optical system
Common Public Radio Interface
Digital Optical Fiber Multi-band RRU
• One system support GSM+DCS+WCDMA
• Output Power 60W
• Support CPRI protocol optical transmission standard
• One master unit can support many slaver unit
• Support Ring/link/star/daisy-chain network topology
• Support long distance transmission about 20Km
3. Digital Optical Fiber Multi-band RRU

Time slot map
off noise suppression
Time slot map
on noise suppression
DSP Key function:
1. Interference control
2. Noise control
DSP( Digital Signal Processing) - Floor noise suppression

MU send time testing data to the
RU and RU test time delay and
adjust it less than 15us in
overlap coverage between the
two remote units
Time delay adjust function

Flexible Network Topology

• Replace part of BTS
• High building indoor coverage
• Railway or high way coverage
• BTS channel resource distribution
Digital Optical Fiber RRU Outdoor solution

There are six tunnels in this 15km section of the Chongqing-Zunyi Railway nearby The
Gaokan BTS, the tunnels are almost non-covered, So we designed a special system with
GrenTech Digital Optic Fiber RRU to cover the Tunnels in this railway section.
ChongQing-Zunyi Railway Tunnels Coverage Solution

System Sketch Map

Indonesia Project

Indonesia Project
RU
optical fiber box
BTS Hotel MU
connection
BTS Hotel MU
3 Sectors

Thank You
国人通信
GRENTECH

Gren tech outdoor coverage solutions

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