چكيده به لاتين
Deploying the short range femtocells with low power consumption is a straight forward solution to the coverage problem of the legacy macrocells for indoor users. In addition, femtocells can enhance data rate, sound quality, battery life, network traffics and greenhouse gases dispersion. However, small size of the femtocells incurs some drawbacks for highly mobile users that necessitate carful hand over management.
In this thesis, a two tire handover management is proposed for disperse femtocell deployment. The intention is to handover from on femtocell to the neighboring femtocell, but if there is no femtocell to move in, the user temporarily hands overs to the nearby macrocell. Afterward, the user monitors the nearby femtocells to complete its handover to the first available femtocell. This scenario lets to minimize the occupation of the macrocell channels and increases the overall network capacity.
The system is simulated to inspect the performance of the system. The results illustrate that, a user mainly resides in the macrocell rather than having a chance to find a femtocell to handover. Therefore, a femtocell to femtocell handover in most hybrid macro-femtocell networks has little chance to succeed. In an extra high density femtocell network there would be a chance for a femtocell to femtocell handover. This type of network suffers from high inter-femtocell interference that makes them inefficient to deploy. Therefore, it can be concluded that a femto to femto handover is a rare and occasional scenario and can be totally ignored.
