Since the introducing of the CDMA technologies, processes of base station deployment have evolved to meet growing demands of mobile services. Regarding to the constraints related to co-locating 4G base station on existing 3G and 2G sites, Distributed Cell Architecture has become a cost-effective way for Operators to get the expected performance with lower investments.

Distributed Cell System is designed to overcome the problems related to that it has become difficult to share the existing sites with the 4G base station without decreasing the whole system performance, which would be damaging and would go against the desired objective sought by deploying the 4G technologies like LTE and Advanced-LTE.

DCS is based on the use of a RF repeater or RF head placed in a remote location and connected on one side to the remote antennas placed in a suitable configuration regarding to coverage and traffic criterias, and connected on the other side to the BTS by mean of a fiber-optic link or by mean of a wireless or optical link.

In order to achieve a sufficient input to output isolation, a high immunity against spurious and broadband inreferences and a low signal distorsion needed to preserve the signal strength and quality, one can use an optical repeater which can be placed close to the antennas to avoid feeder losses and thus saving the BTS output power.

This deployment architecture provides an apropriate way for 4G sites to get the coverage and the traffic flow desired without the restriction of co-locate the antennas with the BTS in existing sites. It is suitable for both outdoor and in-building coverage.

The 3G/4G optical repeater model MODAS6102LEH designed by MCR TELECOMMUNICATION Co features an IP/Ethernet interface which provides a remote control of the repeater parameters namely the gain, the frequency band and the monitoring status. It has a wireless optical port, a FC/APC optical-fiber port and two female SMA RF ports for more flexibility regarding to the engineering rules set up by the Operator.