2010 Poster Sessions : Cross-tier Interference Mitigation for Two-tier OFDMA Femtocell Networks

Student Name : Min Sung Kim
Advisor : Fouad Tobagi
Research Areas: Computer Systems
Femtocells that use co-channel allocation with macrocells can considerably increase wireless coverage and system capacity, especially for indoor and cell-edge users. However, the benefit is realized only when cross-tier interference between femtocells and macrocells is well managed. In this poster, we present a power allocation algorithm for femtocells in downlink OFDMA systems that effectively reduces cross-tier interference by considering the influence on neighboring macro mobile stations (MSs), when only limited channel information about those MSs is available. The use of the proposed scheme enables femtocells to maintain their high throughputs while reducing the performance degradation of neighboring macro MSs as much as possible, with only the information that is available to the femtocells in practice.

Min-Sung Kim is a Ph.D. candidate in the Department of Electrical Engineering at Stanford University, advised by Prof. Fouad A. Tobagi. His research interests include interference management and resource allocation in macro/femto two-tier networks. He received his B.S. (1998, summa cum laude) and M.S. (2000) degrees in Electrical Engineering from Seoul National University in South Korea. Before coming to Stanford, he had worked at KT (Korea Telecom) as a researcher from January 2000 to August 2005.