Radio Network Planning Dimensioning WCDMA radio network dimensioning

Radio Network Planning

Dimensioning � WCDMA radio network dimensioning is a process through which possible configurations and the amount of network equipment are estimated, based on the operator’s requirements related to the following. � Coverage: � coverage regions; � area type information; � propagation conditions. � Capacity: � spectrum available; � subscriber growth forecast; � traffic density information. � Quality of Service: � area location probability (coverage probability); � blocking probability; � end user throughput.

Dimensioning �Dimensioning activities include radio link budget and coverage analysis, capacity estimation and, finally, estimations on the amount of sites and base station hardware, radio network controllers (RNC), equipment at different interfaces, and core network elements (i. e. Circuit Switched Domain and Packet Switched Domain Core Networks).

Radio Link Budgets �There are some WCDMA-specific parameters in the link budget that are not used in a TDMA-based radio access system such as GSM. The most important ones are as follows. �Interference margin �Fast fading margin �Soft handover gain

�an example we can take the Okumura–Hata propagation model for an urban macro cell with base station antennaheight of 30 m, mobile antenna height of 1. 5 m and carrier frequency of 1950 MHz �where L is the path loss in d. B and R is the range in km. For suburban areas we assume an additional area correction factor of 8 d. B and obtain the path loss as:

Up link load factor

Downlink load factor