Femtocell Coverage Optimisation Using Statistical Verification

Abstract

Abstract. Femtocells are small base stations that provide radio coverage for mobile devices in homes or office areas. In this paper, we consider the optimisation of a number of femtocells that provide joint coverage in enterprise environments. In such an environment, femtocells should minimise coverage overlap and coverage holes and ensure a balanced traffic workload among them. We use statistical verification techniques to monitor the probabilistic correctness of a given femtocell configuration at runtime. If there is any violation of the desired level of service, a self-optimisation procedure is triggered to improve the current configuration. Our evaluation results show that, compared with fixed time, interval-based optimisation, our approach achieves better coverage and can detect goal violations quickly with a given level of confidence when they occur frequently. It can also avoid unnecessary self-optimisation cycles, reducing the cost of self-optimisation.

Cooperative and Coordinated Mobile Femtocells Technology in High-Speed Vehicular Environments

“…This has helped in achieving a desired level of performance for mobile transmission, avoiding undesired interference and reducing power consumption. Thus, improving the UE mobile usage experience and reducing the service costs is closely linked to the optimal Femtocell signal coverage as users will feel they are getting the desired services they paid for [17]. In outdoor enterprise environments, several Femtocells might all be deployed together to create joint coverage.…”

Measurement-based coverage function for green femtocell networks

“…In regard to the femto-femto interference avoidance schemes, there are two different approaches: those that use intelligent allocation of spectral resources (Physical Resource Blocks (PRBs) in the LTE specifications) [18][19][20] and those that apply the femtocell pilot power calibration to minimize femtocell overlapping [21,22]. We follow the second approach, therefore we do not take into account the allocation of PRBs to single active UEs' connections.…”