Design, Deployment and Performance of 4G-LTE Networks: A Practical Approach

Chapter 3Analysis and Optimization of LTE System Performance

Mohamed A. El-saidny

Optimization is a crucial step in the deployment and ongoing commercial operation of any cellular system. The overall goal of the process is to ensure that the coverage, capacity, and performance requirements defined during the initial design phase are met in the deployed network. This is achieved by making either physical or parametric modifications.

The key challenge of optimization is defining the loading and traffic distribution in the network. For this reason, effective processes must be in place to optimize the system performance iteratively at every stage of network deployment, from network planning to ongoing commercial operation. Effective optimization maximizes positive user experience and minimizes investment in infrastructure. Hence, adequate optimization processes should enable solutions, whether temporary or permanent, to be developed within the framework and restrictions of network operation.

At all stages of deployment, the optimization process typically considers a set of network's key performance indicators (KPIs) and a set of KPIs reflecting on the subscriber's perceived performance. These can relate to the RF environment in terms of coverage and interference, or to performance targets associated with specific services. KPI targets and focus will change based on the optimization process phase of the network.

To ensure a successful network optimization and performance assessment, ...