In this presentation, we will introduce a class of distributed optimization algorithms for resource allocation problem, built on potential game and related to simulated annealing. We will use conventional 3GPP-LTE like eICIC/FeICIC networks in the real life as example to illustrate.  A general objective is to address the entangled inter-cell interference and user association problem. Some related works and questions would be discussed based on computer simulation results to explain some observations.