Quality Analysis Parameter Setting Master Plan (Optimisation Proposal) Figure 8.14 Optimisation process 8.7.2 Process Definition Optimisation of a 3G network is aimed mainly at capacity and quality, against a backdrop of the QoS desired by the applications used by subscribers. In GSM there are very few key performance indicators, mainly related to the quality of the microwave network. However, as ATM is used in 3G transmission networks, the number of parameters increases tremen- dously, SO increasing the number of KPIs. The main KPIs, apart from the microwave KPIs discussed in Chapter 3, relate to the ATM performance. ATM QoS parameters are the ones to be monitored mainly, and they act as KPIs for transmission network optimisation in 3G networks. Data collection mainly involves existing network data, such as site configuration, network topology, link budget calculations, commissioning data, monitored data (i.e. power levels monitored at the time of site commissioning), and the performance of the KPIs. Most of the data collected is similar to the types we have previously seen in Chapter 3. 8.7.3 Network Analysis This consists mainly of capacity analysis and quality analysis. 3G TRANSMISSION NETWORK PLANNING AND OPTIMISATION Capacity Analysis For a GSM transmission network, the capacity calculation and assessment is relatively straightforward. If the site configuration of TRXs is known, the required capacity for the link can be calculated easily. However, capacity analysis of a 3G network it is not so direct. We have seen that capacity calculations are dependent on the types of traffic and SO cannot be calculated directly from the number of TRXs or the number of application managers used in a base station. Thus, traffic parameters and the quality that is to be achieved are important inputs. An increase in traffic is the most likely reason for analysis of capacity. Usually when the link capacity is dimensioned in the pre-planning phase, future needs are taken into account. In GSM transmission network optimisation, a