Feasibility, convergence, and optimization of LTE femto networks

摘要

Methods and systems used to plan, optimize, and manage LTE femtocell networks describes an analytical framework and algorithms that allow analysis and planning of various femtocell aspects including dynamic adjustment of femtocell power for interference mitigation, and optimization according to user selectable policies. The framework recommends using a hybrid of both distributed control and centralized policy enforcement. An algorithm having two closely related aspects is provided. The first part is an Iterative and Distributed Algorithm (IDA), which is intended to be executed inside the femtocells. The second part of the algorithm is intended to be used as a toolset and is called Analytic Computational Algorithm (ACA), which is intended to be used in a centralized planning and operations center. The ACA provides a set of conditions that are used to check for convergence of the IDA.

主权项

1. A method of optimizing performance of femtocells in a long term evolution femtocell network of femtocells comprising the steps of:
(a) providing global policy rules for the network; (b) providing a predetermined QoS parameterized by α, where α is in a range of values such that the power adjustment of the femtocell network is stable and converges and α has values between 0 and 1; (c) each femtocell in the network independently processing information from measurements or estimations of parameters and the value α, for each femtocell; (d) each femtocell periodically adjusting its resources according to the processed information and the rules; and (e) repeating step (c) and step (d) with new parameters until the value of α is met for the network.