User's Manual

SME VoIP System Guide, Version 1.5

Proprietary and Confidential

Chapter: SME VoIP Network Planning/Optimization

sources are radio transmitters, electric arc welding machines, copying machines, electric motors,

refrigeration units, power transformers, electric load centers, and main circuit breaker panels.

• Ensure that the electrical service is sufficient and located in close proximity to the Base stations.

4.8 Network Assessment/Optimisation

This involves monitoring, verifying and improving the performance of the SME VoIP network. Depending on

the network setup and varying deployment conditions and network usage some requirements have to be

monitored and corrected.

The main focus of network optimisation should be telephony quality, handovers, network traffic and other

related measurements.

The quality of the network is ultimately determined by the satisfaction of users of the network. Therefore

before SME VoIP Networks are handed over to customers, Network providers must perform walk or drive

testing using the appropriate measurement kits.

The walk or drive testing kit includes 2 or 3 test phones, a walk/drive testing software (deployment kit

software) and a suggested walk path, etc.

Collect statistics of the network an example is illustrated in the table below:

Parameters

Value

Comments

## Call Setup failures

## Dropped calls

## HO successes

## HO failures

Traffic Blocking Rate

(%)

Traffic Blocking (Erl)

Receiver level (dBm)

Receiver Quality (%)

After collecting the necessary information, you should fine tune signalling and radio resource sharing

parameters. Network optimisation is a continuous process during and after the launch of the network.

For example, if it is found that an area within a building has low signal level. There should be an immediate

scrutiny of base station and/or repeater locations, heights and tilts. The problem is sorted out by moving

the relevant devices and altering the tilts of these devices.

For buildings/halls constructed with high signal attenuation materials, deploying additional base stations

will be one of the solutions.