@conference {
	title = {Coordinated Scheduling and Power Control for Downlink Cross-tier Interference Mitigation in Heterogeneous Cellular Networks},
	author = {Sung, Doo-hyun., Baras, John S., Zhu, Chenxi.},
	year = {2013},
	month = {12/2013},
	abstract = {In heterogeneous cellular networks, the deployment~of low-powered picocells provides user offloading and capacity~enhancement. The expansion of a picocell{\textquoteright}s coverage by adding~a positive bias for cell association can maximize these effects.~Under this circumstance, downlink cross-tier interference from~a macro base station to pico mobile stations in the expanded~picocell range deteriorates those pico mobile stations{\textquoteright} performance~significantly. In this paper, a coordinated scheduling~and power control algorithm is proposed, whereby the macro~base station reduces its transmission power for those victim~pico mobile stations in the expanded picocell range only on a~set of resource blocks to minimize performance degradation at~the macro base station. First, the transmission power level is~calculated based on the mobile stations{\textquoteright} channel condition and
QoS requirements. Then, a set of resource blocks is determined~by solving a binary integer programming to minimize the sum~of transmission power reduction subject to victim pico mobile~stations{\textquoteright} QoS constraints. To reduce computational complexity,~we utilize a heuristic algorithm, i.e., max-min greedy method,~to solve the problem. Through system level simulations, we~show that average and 5\%-ile throughputs of victim pico mobile~stations are significantly improved.},
	address = {Atlanta, Georgia},
	booktitle = {IEEE Globecom 2013},
	pages = {pp. 3914-3918}
}
