Wireless Communication In-Building Solution

It is a network solution specifically designed to address the coverage and capacity issues of mobile communication signals within buildings, such as basements, elevators, stairwells, meeting rooms and other areas where traditional signals are difficult to cover.

Industry Overview

Global Passive IBS Vision

As Indoor Distribution Integration Expert, ZTT is committed to provide professional passive In-building solutions, including designation and packaged goods for all above solutions.

Industry Challenges

Multiple Frequency Bands

Modern communication requires support for multiple network standards such as 2G/3G/4G/5G, as well as multiple frequency bands including 700MHz, 900MHz, 1.8GHz, 2.6GHz, 3.5GHz, and 4.9GHz.

New Challenges of 5G

The Massive MIMO technology of 5G has extremely high requirements for antenna layout, which cannot be supported by traditional single-channel or dual-channel indoor distribution systems.

Capacity and coverage

In high-density user scenarios such as airports, stadiums, and large shopping malls, the network challenge is not only about "coverage", but also "capacity".

Interference problem

There will be co-frequency interference between micro base stations and pico base stations, and indoor Wi-Fi, Bluetooth and other devices will cause interference to cellular networks.

Our Solution

Global Passive IBS Vision

As Indoor Distribution Integration Expert, ZTT is committed to provide professional passive In-building solutions, including designation and packaged goods for all above solutions.

DAS Solution 1.0

DAS1 is the traditional DAS solution which is well versed by ZTT. ZTT is available to provide services such as system design, package solution and installation instruction.

Roomtop Solution 1.0

Roomtop 1.0, a new wireless in-building solution since 2017. It use leaky cable to install above the ceiling to connect matching components and equipment to achieve indoor wireless signal coverage.

DAS Solution 2.0

Based on DAS 1.0, using aluminum feeder instead of copper feeder, achieve indoor signal coverage with more economical and environment-friendly way. Maintain the original link design system based on DAS 1.0. Maintain the original passive material and related accessories.

Roomtop Solution 2.0

ZTT developed aluminum outer conductor Roomtop leaky cable, which is Transmisson Cable of Roomtop 2.0, verified by performance test, realized cost reduction compared with DAS 1.0. Roomtop 2.0 is more cost-effective than DAS 2.0 due to less construction labor in open and uncovered indoor scenarios.

Value Contained

Co-Construction of Joint Lab

In 2018, China Tower and ZTT formally signed a strategic cooperation agreemen. ZTT maintains an open attitude towards collaborating with partners to develop new products in the future.

Cost Changes Overview-More Economical

Roomtop solution can help to save a lot of cost and with the advantages such as simple link design, reduce construction time, convenient maintenance.

Energy Saving ＆ Low-Carbon

Promoting Energy Transition and Improving People's Livelihood

As the amount of copper used decreases, energy consumption will be reduced and the environment will be protected.

Successful Cases

Katara Towers Project Lusail_MIMO

In Qatar, we have collaborated with the operator Ooredoo to achieve high-quality indoor wireless signal coverage.

Nantong Hefeng Building Turnkey Project (Roomtp 1.0)

Leaky Cable(7/8”)with terminated with omni antenna.

Wall Material: Heavy Concrete, Partition Dry wall, Glass Window, Plaster Dry wall, Elevator Cage, Heavy Wood Door.

Floor Height: 3m; Part Height: 2.5m; Ceiling Height: 2.1m; Wall Height: 3m.

5G NR: n41 2600 MHz; Bandwidth: TDD 100MHz; SISO.

KPI SS-RSRP＞-85dBm of 90% of covered area.

Signal source input power：approximately 1W.

Single Layer Coverage Area: 1361 m²

Korea Operator LG U+(DAS 2.0)

LTE Band, 850MHz, 2.1GHz

Single Layer Coverage Area: 1070 m²

Solution: All the cable are aluminum RF feeder cable, mostly 2/5”，few 1/2”.

China Parking Lot(Roomtop 2.0)

1/2” leaky cable + 2 directional panel antennas

The antenna is installed at the end of leaky cable

Application Floor: The underground floor in the high-rise residential area

Single Layer Coverage Area: 7000 m²

Successful Cases

Katara Towers Project Lusail_MIMO

In Qatar, we have collaborated with the operator Ooredoo to achieve high-quality indoor wireless signal coverage.

Nantong Hefeng Building Turnkey Project (Roomtp 1.0)

Leaky Cable(7/8”)with terminated with omni antenna.

Wall Material: Heavy Concrete, Partition Dry wall, Glass Window, Plaster Dry wall, Elevator Cage, Heavy Wood Door.

Floor Height: 3m; Part Height: 2.5m; Ceiling Height: 2.1m; Wall Height: 3m.

5G NR: n41 2600 MHz; Bandwidth: TDD 100MHz; SISO.

KPI SS-RSRP＞-85dBm of 90% of covered area.

Signal source input power：approximately 1W.

Single Layer Coverage Area: 1361 m²

Korea Operator LG U+(DAS 2.0)

LTE Band, 850MHz, 2.1GHz

Single Layer Coverage Area: 1070 m²

Solution: All the cable are aluminum RF feeder cable, mostly 2/5”，few 1/2”.

China Parking Lot(Roomtop 2.0)

1/2” leaky cable + 2 directional panel antennas

The antenna is installed at the end of leaky cable

Application Floor: The underground floor in the high-rise residential area

Single Layer Coverage Area: 7000 m²

Wireless Communication In-Building Solution

Industry Overview

Global Passive IBS Vision

Industry Challenges

RF Copper Cable

RF Aluminum Cable

Roomtop Leaky Cable

Repeater

Antenna

Our Solution

Global Passive IBS Vision

DAS Solution 1.0

Roomtop Solution 1.0

DAS Solution 2.0

Roomtop Solution 2.0

Value Contained

Co-Construction of Joint Lab

Cost Changes Overview-More Economical

Energy Saving ＆ Low-Carbon

Successful Cases

Katara Towers Project Lusail_MIMO

Nantong Hefeng Building Turnkey Project (Roomtp 1.0)

Korea Operator LG U+(DAS 2.0)

China Parking Lot(Roomtop 2.0)

Successful Cases

Katara Towers Project Lusail_MIMO

Nantong Hefeng Building Turnkey Project (Roomtp 1.0)

Korea Operator LG U+(DAS 2.0)

China Parking Lot(Roomtop 2.0)