Femtocells being small low powered base stations provide sufficient increase in system capacity along with better indoor coverage. However, the dense deployment of femtocells face the main challenge of co channel interference with macrocell users. In this paper, this interference problem is addressed by proposing a novel downlink power control algorithm for femtocells. The proposed algorithm gradually reduces the downlink transmit power of femtocells when they are informed about a nearby macrocell user under interference. This information is given to the femtocells by the macrocell base station through a unidirectional downlink broadcast channel. Simulation results show that the algorithm causes the macrocell to accommodate large number of femtocells within its area, whereas at the same time protecting the macrocell users from any harmful interference.
|Title of host publication||IEEE Wireless Communications and Mobile Computing Conference (IWCMC), 2011 7th International|
|Place of Publication||Istanbul, Turkey|
|Publication status||Published - Jul 2011|
|Event||IEEE International Wireless Communications and Mobile Computing Conference, 2011 - Istanbul, Turkey|
Duration: 04 Jul 2011 → 08 Jul 2011
|Conference||IEEE International Wireless Communications and Mobile Computing Conference, 2011|
|Period||04/07/2011 → 08/07/2011|