Exploiting Cell dormancy and Load Balancing in LTE HetNets

摘要

At a coarse time-scale, at the start of each frame the choice of TPs to be made active and users to associate with the active TPs are determined by solving an optimization problem. The inputs to the optimization problem are averaged slowly varying metrics that are relevant for a period longer than the backhaul latency. At a the fine time-scale, in each slot each active TP independently does scheduling over the set of users associated with it, without any coordination with any of the other active TPs, based on fast changing information, such as instantaneous rate or SINR estimates.

主权项

1. A computer implemented method for LTE heterogenous networks (HetNets), the method comprising the steps of:
considering some transmission points (TPs) from a set of TPs of interest that are made inactive over a frame, and load balancing (known as user association), associating users to active TPs in the set of TPs such that each user is associated to any one active TP over the frame; reformulating the user association for any given set of active TPs in an LTE heterogenous network as coarse time-scale (frame-level granularity) and fine-time scale (fine sub-frame/slot level) approaches; performing periodically the coarse frame-level granularity based on averaged slowly varying metrics that are relevant for a period longer than a backhaul latency; and doing the fine sub-frame/slot level granularity with no coordination among TPs and independently by each active TP based on fast changing information.