After having configured the network appropriately as described in the previous chapter, further optimisation steps are necessary during the operation of the network. One reason for this need is the fact that the environment may change, such as:
- Propagation conditions, for example, new buildings or streets, falling leaves in autumn.
- Traffic behaviour, for example, new traffic concentrations.
- Deployment, for example, the insertion of new base stations.
As a consequence, previously configured parameters will become suboptimal. Adaptation of the parameters in order to track those changes can obviously improve the performance of the network.
Another reason for further optimisation steps is the fact that measurements from the operating network under realistic load conditions provide a much more accurate picture of the reality compared with the assumptions which the initial configuration was based on. In many cases, the measurements will reveal problems which could not have been predicted from the initial assumptions on propagation or traffic. Thus, even without the aforementioned environmental changes, the configured parameters should be checked and potentially updated during the operation.
The expression ‘self-optimisation’ summarises mechanisms ...