Design, Planning & Optimization / TSS-Survey Departmanı

Planning Optimization / TSS

DESIGN, PLANNING AND OPTIMIZATION

RF Planning & Design

Radio network planning comprises of radio network dimensioning, planning of the coverage, capacity, frequency allocation andinterference analysis. Moreover it includes detailed planning, which concentrateson theparameterofplanning with necessary field measurement.

 

RF Cell Planning

• Initial dimensioning of the radio network
• CW Propagation model tuning
• Candidate identification & nominal planning
• Technical site surveys

 

Capacity Planning

• Coverage and capacity planning and analysis
• Addition of new cell sites
• Upgrade of existing cell sites
• Signaling/SDCCH dimensioning
• Additional spectrum use
• Traffic Management

 

Frequency Planning

• Static frequency allocation
• Frequency hopping (RF hopping or Baseband hopping)
• Frequency and neighbors planning
•Hierarchical Cell structure



Active Systems and DAS Solutions
The principle function of an active distributed antenna system (DAS) is, like a passive distributed antenna system, it distributes the signal to a number of indoor antennas. However, there are some big differences. The active distributed antenna system normally relies on thin cabling, optic, optical fibers and IT type cables, making the installation work very easy compared with the rigid cables used for passive systems.


The ability to compensate for the loses of the system makes the system very easy and fast to plan, and easy to implement in the building. When designing active distributed antenna systems it does not matter if the antenna is located 20 m from the base station or even 5 km. The performance will be the same for all antennas in the active system.


It is easy and flexible to adapt and to upgrade the active DAS systems.


There is no need to rework the whole design and installation, there is always same antenna power, whatever the number of antenna or distance to antenna are changed.


The active DAS is able to monitor the end-to-end performance of the total DAS and give alarms in case of malfunction or disconnection of cables and antennas. These active DAS systems can support one band operator or large multioperator solutions.


The active DAS systems don’t need high power, will typically only require about +10dBm input power from base station. A mini base station can be used to feed the system.


The philosophy behind the purely active DAS architecture is to have the last DL amplifier and the first UL amplifier as close to the antenna as possible. Co-located with the antenna is the remote unit (RU), avoiding any unnecessary degrading losses of passive coax cables.


The increasing need for more for more and more bandwidth over the DAS to support multiple radio services, GSM, DCS, UMTS, Wi-Fi, WiMAX, Tetra, etc. has motivated and need for the indoor fiber DAS system to support a wider bandwidth to accommodate all the radio service.

 

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