There is a topology picture of a typical One-Take-Four system as follows. Based on the actual site needs, we could also use One-Take-Eight system and use flexible indoor antennas combo. The underground parking lot is an open and enclosed area, using antennas combo with ceiling antenna, LPDA antenna and panel antenna could meet the demands of indoor signal distribution system with lowest materials.
1.4 Solution Advantages
⑴ Solved the signal problems of China Mobile, Unicom, Telecom.
It supports 2G+4G signal of Mobile:GSM900M, DCS1800M, FDD LTE1800M and TDD-LTE2600M,
2G+3G+4G signal of Unicom: GSM900M, DCS1800M, WCDMA2100M and FDD-LTE1800M,
2G+3G+4G signal of Telecom: CDMA800M and FDD-LTE1800M.
⑵ Using fiber cable to transmit signal between MU and RU, it would decrease well the signal attenuation, and meet the demands of distant and big coverage,
⑶ The gain is high to 105dbi, which makes up the weak signal sources issue.
⑷ The full output power is high to 27dbm/1W, which could support 15 to 20 indoor antennas to cover 5000 to 10000 sqm.
2.1 Site Survey
Except the analysis to the layout, we need to have accurate project information like: signal source, zoning, and cable tray. Signal frequency and strength could be tested as follows in out of South area and North area.
The signal frequency and strength could match and meet the demands of our repeater.
After the site survey to the cable tray and equipment room in parking lot, we collected the information of surrounding of parking lot, AMR demands of each equipment room, positions of Property management office, monitoring room, elevator room to design the exact wiring and topology pictures.
2.2 Solution Design
Based on the above data, the solution designed as follows, Use One-Take-Three UDAS in North area with one MU and three RUs. Each RU covers each small area. And C is much opener and squarer, so there would be one channel from RU in C to cover the east side in A.
Use One-Take-Five UDAS in South area with one MU and five RUs. Each RU covers each small area including equipment room, property management office, monitoring room and elevator room.
With this solution with best-price repeater, easiest wiring and construction and the shortest construction time, we won the rely of our client, and succeeded in biding.
3. Project Construction
There are three parts for construction: wiring construction, PDAS construction, device debugging. The timetable as follows,
The construction process is fully implemented in accordance with construction company’s construction standards. All the cables are installed into the cable tray, and the exposed cables are protected and beautified by bushings.
The previous cables wired by the property management office are all removed and replaced by UDAS. After a two-week construction, we finished the UDAS construction on two parking lots with 70,000sqm.
4. Signal Test
After plug in, the RU could have a full output power.
Verify the signal strength in some specified position of South/North area as follows, all are excellent signal.
5. Project summary
UDAS with five band device is the optimal solution for large-area, long-distance signal coverage. Whether it is parking lot, real estate, property, park lot, or even tunnel construction, by using our UDAS, people could achieve all network calling and data signal coverage with lowest price and easiest construction.
Flexible combo of MU&RU with exact wiring and construction could meet all the signal coverage demands. XingHe DanDi is a typical case of PDAS, it has following features:
1. Demands of 2G calling + 4G data signal of all signal providers.
2. Big coverage. If use coaxial cables, it would be hard to wire and construct, and it’s high loss, and bad performance.
3. Easy construction, low-cost device, Low labor and maintenance costs.