System and method for downlink power optimization in a partitioned wireless backhaul network with out-of-neighborhood utility evaluation

摘要

A system and method for downlink power optimization in a partitioned wireless backhaul network with out-of-neighborhood utility evaluation is disclosed. The method comprises performing initial downlink power optimization for each neighborhood independently, considering only in-neighborhood utilities, by obtaining the transmit powers of all hubs and a utility performance of all served remote backhaul modules (RBMs) in the neighborhood. Power optimization data for each neighborhood are then reported to a central processing unit for storage. Thereafter, for each neighborhood, an out-of-neighborhood utility evaluation is performed by the centralized processing unit, based on reported power optimization data from other neighborhoods, for example, by obtaining delta out-of-neighborhood sum utilities for each hub as a function of hub transmit power, by curve fitting of reported data. Power optimization for each neighborhood is then performed by optimizing both in-neighborhood sum utilities and out-of-neighborhood sum utilities, and hub transmit powers are updated accordingly.

主权项

1. A method of downlink power optimization in a partitioned fixed wireless backhaul network comprising a plurality of nodes, wherein each node comprises at least one hub module, and each hub module serves one or more remote backhaul modules (RBMs) through hub-RBM radio links, the network being partitioned into a plurality of neighborhoods, each comprising a subset of the plurality of nodes, the method comprising:
for each neighborhood independently, performing a downlink power optimization by optimizing a sum utility over the neighborhood comprising in-neighborhood utilities only; reporting power optimization data to a centralized processing unit; storing reported power optimization data for each neighborhood for look-up by the centralized processing unit; in the centralized processing unit, for each neighborhood, performing a downlink power optimization by optimizing a sum utility comprising in-neighborhood utilities and out-of-neighborhood utilities, said out-of-neighborhood utilities being obtained by an out-of-neighborhood utility evaluation of the stored power optimization data reported by other neighborhoods; and issuing hub transmit power update commands.