1. The Traditional Distribution System : DAS/POI
Coupler
Power Divider
RRU
Cable
Fiber
BBU
POI
Passive network is difficult to manage and requires complex link calculation.
Most of the power are wasted on the copper cable.
At least 20W output is required (POI depends on output power of RRU).
The use of a large number of RRUs to cover a wider area needs more space and heat dissipation is significant.
All the base stations should be installed at the same site.
In the past, we use the distribution system which is based on the cables to resolve the coverage in building.
Thi network can meet the coverage requirement in most cases. is widely used in 2G system.
But it has its own problem.
here and there
Because the cables are difficult to layout, the signal resoureces have to be close to the buiding. sometime we have to add new basestations.
antenna, coupled, this is cable, so the RRU should be in the same buiding should be on the same site
coupler couple
The POI needs high power output. point of the interface
Network is difficult to expand.

2. Multiservice Distributed Access System
MDAS Solution
Multiservice Distributed Access System
Active network is easier to manage and expand. NO link calculation is required.
Built on FOC infra. No wasted power and no interference.
RU1
RU2
RU3
RU4
RU5
RU6 AU 2G 3G
LTE
EU1
EU2
MDAS Solution
Coax　　Fiber Composite
MIMO1
MIMO2
Very low output power is required.
RUs are tunable via NMS and can be easily tested and optimized.
In the past, we use the distribution system which is based on the cables to resolve the coverage in building.
Thi network can meet the coverage requirement in most cases. is widely used in 2G system.
But it has its own problem.
here and there
Because the cables are difficult to layout, the signal resoureces have to be close to the buiding. sometime we have to add new basestations.
antenna, coupled, this is cable, so the RRU should be in the same buiding should be on the same site
coupler couple
The POI needs high power output. point of the interface

3. MDAS Value Proposition
Multiservice Distributed Access System
Supports 2G, 3G, 4G and 5G (future) networks simultaneously.
Optical fiber based transmission mechanism.
Can provide coverage up to 400,000 sqm. per BTS (POI solution requires 1 BTS per POI to cover 8,000 sqm.)
MDAS does not require link budget calculation.
MDAS provides end-to-end management capabilities (AU, EU and RU), line-fed powering of RUs for significant OPEX savings. (POI requires significant space and controlled environmental temperature due to high heat dissipation).
MDAS is easy to implement, maintain, manage and expand.
MDAS can facilitate and provide better SLA with end users.
the struct is similar, but the technology is different from the traditional one.
This system is based on the optical fibers, the digital signals are transferred and recieved beween AU ,EU and RUs.

4. OPEX Savings: Low Power Consumption
MDAS only requires less power consumption compared to POI, thus, there’s a significant savings in OPEX with regards to power requirement.
TABLE: MDAS vs POI power requirement comparison

5. MDAS Composite Cable
Fiber composite cable used by MDAS is relatively cost-effective than the use of RF feeder cables in traditional DAS system.

6. MDAS Solution Deployment
MDAS CONNECTIVITY
COAX
FIBER
COMPOSITE
the struct is similar, but the technology is different from the traditional one.
This system is based on the optical fibers, the digital signals are transferred and recieved beween AU ,EU and RUs.

7. Operators & Communication system
Frequency Bands
System can be customized
China's frequency band table (only for reference):
Operators & Communication system UL DL
CMCC GSM
889~909MHz
934~954MHz
CMCC DCS
1710~1735MHz
1805~1830MHz
CMCC TD-SCDMA
2010~2025MHz
CMCC TD-LTE
2320~2370MHz
CUCC GSM
909~915MHz
954~960MHz
CUCC DCS
1735~1755MHz
1830~1850MHz
CUCC WCDMA
1940~1970MHz
2130~2160MHz
CUCC TD-LTE
2300~2320MHz
CUCC FDD
1755~1765MHz
1850~1860MHz
CTCC CDMA
825~835MHz
870~880MHz
CTCC TD_LTE
2370~2390MHz
CTCC FDD
1765~1780MHz
1860~1875MHz

8. Installed Base
November 2015; CMCC Central;15,000 AU, 65,000 EU and 318,000RU, to construct CMCC LTE network.
September 2015; CMCC Liaoning Company; 200 AU，400EU，3000RU
January 2015; CMCC Jiangsu Company 20,000 RUs
January 2015; CMCC Hainan Company; 60 AU，330 EU，1,850 RU
May 2014; CMCC Hainan Company; 2000 RUs