July 2011 - Telecommunications Blog

A blog for mobile communications systems GSM , UMTS and LTE

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Monday, July 18, 2011

WCDMA Network Planning 3

7/18/2011 05:22:00 PM 0
WCDMA Network Planning 3
Conditions for planning


** Conditions :

• capacity not constant.
• separate analysis for UL/DL.
• joint coverage/capacity analysis.
• HO areas and levels affect directly system capacity.
• basic shared resource is power.

** Objective parameters :


• coverage.
• capacity (blocking).
• good link quality (BER, FER).
• throughput delay, for packet services Methods.
• preplanned during network planning process.
• real time radio resource management.
• real time power control.





Network planning



Resource reservation for handling expected traffic without congestion.
           – load per cell/sector, handover areas.

Sets allowable “power budget” available for services.
           – load higher than expected.
           – load “badly” distributed.
           – implements statistical multiplexing.

Estimates average power/load, variations of it are taken care in run time by RRM.
           – maximal allowed load versus average load.

Thursday, July 7, 2011

WCDMA Network Planning 2

7/07/2011 02:19:00 AM 0
WCDMA Network Planning 2
Planning methods

•  Preparation phase.
           – Defining coverage and capacity objectives.
           – Selection of network planning strategies.
           – Initial design and operation parameters.

Initial dimensioning.
           – First and most rapid evaluation of the network elements count and capacity of these elements.
           – Offered traffic estimation.
           – Joint capacity coverage estimation.

Detailed planning.
           – Detailed coverage capacity estimation.
           – Iterative coverage analysis.
           – Planning for codes and powers.

Optimisation.
           – Setting the parameters.

Soft handover.

Power control.

Verification of the static simulator with the dynamic simulator.
           – Test of the static simulator with simulator where the users actual movements are modelled.