Flexible Backhaul Design for Cellular Interference Management

摘要: Flexible Backhaul Design for Cellular Interference Management Page 1 Flexible Backhaul Design for Cellular Interference Management Venu Veeravalli Director, Illinois Center for Wireless Systems Coordinated Science Lab ECE Department University of Illinois at Urbana-Champaign Page 2 Interference in Cellular Networks Interference Management is critical in dense wireless networks Veeravalli – ICNC 2/18/15 Page 3 K-User Interference Channel Tx 1 Rx 1 Tx 2 Tx k Rx 2 Rx k Veeravalli – ICNC 2/18/15 Page 4 Information Theory & Interference Management • Exact characterization of capacity o Very hard problem; still mostly open • Approximate characterization of capacity o Within constant number of bits/sec o Provides some architectural insights • Degrees of freedom (DoF) o Pre-log factor of sum-capacity in high SNR regime o Number of interference free sessions per channel use o Simplest of the three, but …