Capacity Transfer System

CTS GSM 900

en.irz.ru

Version 2.3 November, 2016

Izhevskiy Radiozavod (IRZ)

Date of foundation

Total number of employees

Engineering department

Customer representative offices

Company is certified to

• Russian group of companies producing electronics

• March 6, 1958

• 5 390

• 710

• Ministry of Defense, Russian Railways

• AS/EN 9001 standard by International Aerospace Quality Group (IAQG) for aerospace and military products

2

System purpose

3

Railways Automobile roads Countryside

System is designed to provide GSM 900 mobile network coverage for

remote territories, automobile roads, or railways where the

installation of traditional GSM base stations is not feasible due to

small mobile traffic.

Various configurations of mobile networks for

settlements

Traditional

cellular network

4 base stations

(BTS)

Capacity Transfer

Technology

1 base station and

3 CTRs

Capacity Transfer Repeaters (CTR) are designed to replace base stations of a cellular network without loss of service area and network capacity. CTRs need no radio relay or optic feed lines.

Technology

Technology

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Network capacity transfer technology

System allows sequent retransmission of RF signals

between base station (BTS) and user’s mobile stations.

It can be connected to a standard equipment of any

vendor at a GSM site. The system retransmits and

distributes up to six GSM carrier frequencies (TRX)

over a target area (from 1 to 3 hops of retransmission

without relay systems).

Converter is to be mounted near a GSM base station.

Converter converts BTS’ carrier frequencies

(TRX3..TR6) to retransmission bandwidth (X3..X6), and

then transmits them to the repeater (CTR).

Repeater on the opposite side amplifies and retransmits

the signal, and also converts the signal back to GSM

bandwidth providing further coverage with 2 sectors

similar to the base station (1 GSM carrier in each

sector).

Converter (CVR) – converts TRX of BTS from 900 MHz (GSM) to 6 GHz bandwidth

Repeater (CTR) – unit with double-side duplex retransmission, 2 TRX GSM 900

Specification

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Repeater (CTR1, CTR2)

Base station frequency converter (CVR)

Operating frequency

- GSM channel 876–915/921–960 MHz

- retransmission channel 5925-6425 MHz

Repeaters TRX power

- GSM channel 0.5-20 W (programmable)

-retransmission channel 0.5 W

Power consumption (at output power of 10 W)

up to 360 W (CTR1), up to 250 W (CTR2), up to 100 W (CVR)

Number of transmitted GSM carrier frequencies

up to 6

Number of retransmission sections up to 3

Operating temperature minus 40 … +55 °С (minus 40 ..122 °F)

Protection class IP67

Power supply - CTR1, CTR2

- CVR

AC 220/110 V DC -48 V

Overall dimensions (with built-in PSU) -CTR1, CTR2

- CVR

520х400х260 mm (20.47x15.75x10.24 inch) 320х400х260 mm (12.59x15.75x10.24 inch)

Weight, kg - CTR1 - CTR2 - CVR

47 kg (103.6 lbs) 42 kg (92.6 lbs) 35 kg (77.2 lbs)

RAN sharing

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The system is compatible with the base stations of any vendor, and this allows implementing network

capacity transfer for several mobile operators simultaneously (e.g. for 2 operators).

• For each of the operators the system allows the replacement of 6 GSM base stations and 6 radio

relay lines by 6 jointly used repeaters.

• The system reduces the number of towers and sites by 2

• The system reduces site’s power consumption by 2-3 times

• An operator can use light-weight towers

RAN sharing example

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Operator 1 Operator 2 RAN sharing

The installation of the network capacity transfer repeaters (CTR) which are shared by 2

operators using the towers of each operator allows reducing the number of base stations, and

ensures the coverage of much more area and network capacity increase.

CTR2

CTR1

CTR1 CVR2 CVR1

RAN Sharing

RAN sharing for 2 operators: • Each operator provides 3 TRXs • GSM signals of each operator are coming from CTR

output to dual polarized service antennas through splitters providing shared coverage over a specific territory

Cost effect

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Network configuration

Cost reduction factor (BTS/CTR) for network section

(1 operator)

Cost reduction factor (BTS/ CTR) for network section

(RAN sharing – 2 operators)

Equipment Power

consumption Equipment

Power consumption

Linear 3 sites

1,29 2,3 1,73 2,6

Linear 5 sites

1,59 3,1 2,21 3,6

Linear 7 sites

1,72 3,6 2,82 4,2

Rectangular

9 sites 1,59 4,0 2,95 5,1

Rectangular

25 sites 1,72 5,2 4,3 7,0

BTS – base station, CTR – network capacity transfer repeater

CTR BTS CTR

CTR BTS CTR CTR CTR

CTR BTS CTR CTR CTR CTR CTR

CTR1 CTR2 CTR3

CTR4 CTR5

CTR6 CTR7 CTR8

BTS

CTR7 CTR8 CTR9

CTR12 CTR13

CTR16 CTR17 CTR18

BTS

CTR1 CTR2 CTR3

CTR20 CTR21 CTR22

CTR4 CTR5

CTR23 CTR24

CTR10

CTR14

CTR19

CTR6

CTR11

CTR15

Production

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Full scale serial production of the Capacity

Transfer System is organized at IRZ, Izhevsk,

Russia.

Benefits

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Reduction of CAPEX and OPEX costs (comparing to a

traditional method of GSM coverage) calculated for a specific

territory

Reduction of power cost at a site from 1.5-2 kW (for a

traditional equipment) to 0.36 kW with the same coverage area

and network capacity

Reduction of connection interruptions due to failed handovers

(the length of a connection zone of one base station equipped

with the system can be increased by 4-6 times)

Mobile network coverage in tunnels and closed premises

without fiber optic equipment

Reduction of costs of mobile operators due to simultaneous

operation of the system by 2 or 3 operators (RAN-sharing)

without loss in quality of services and network coverage

Contact us

We are looking for partners to

establish long-term cooperation.

IRZ

19 Bazisnaya street, city of Izhevsk, Russia, 426034

Tel / fax: + 7 3412 501 501 / 686 555

Email: sales@irz.ru

Web: en.irz.ru

Sergey Nevyantsev

Business Development Director

Tel: +7 3412 500 505

Email: nevyantsev@irz.ru

Anton Starkov

Head of Business Development Department

Tel: +7 3412 722 971

Email: starkoff@irz.ru