Speaker: Dantong Liu
Title : Joint Uplink and Downlink User Association for Energy-Efficient HetNets Using Nash Bargaining Solution
In heterogeneous networks (HetNets), due to transmit power disparity between macro and pico base stations (BSs), the conventional strongest downlink (DL) reference signal received power (RSRP) based user association results in high uplink (UL) interference. Such interference degrades the UL performance especially in terms of energy ef?ciency. To this end, we propose Joint Uplink and Downlink User Association (JUDUA) that takes both the UL and DL energy ef?ciencies into consideration when deciding the serving BS for user equipments (UEs). JUDUA formulates user association optimization problem as a Nash bargaining problem aiming to maximize the sum of log-scale UL and DL energy ef?ciencies among all UEs. Simulation results demonstrate that JUDUA improves UL and DL energy ef?ciencies of UEs, which in turn boosts UL and DL system capacity, reduces UL transmit power compared with the conventional user association schemes.
Date: 19th March, 2014.
Time: 14.00-15.00 hrs
Venue: QMUL Maths:1.03