Centralized management for pilot pollution mitigation in small cell networks

摘要

A small cell (e.g., femtocell) in a wireless communication may determine a set of wireless signal measurements for a plurality of small cells causing pilot cell pollution within a coverage area. The small cell may determine an adjustment of a transmission parameter of the small cells for reducing the pilot cell pollution, and transmit the adjustment to the small cells. The adjustment may include, for example, minimizing an area of overlap between at least two small cells having signal power difference below a threshold, maximizing a signal to interference and noise ratio at a location associated with at least two small cells, minimizing an area associated with at least two pilot signals within a threshold signal level, distributing traffic load to at least two of the small cells based on the set of measurements, or by minimizing the number of small cells covering a path.

主权项

1. A method comprising:
determining, by at least one apparatus, a set of wireless signal measurements for a plurality of small cells; detecting, by the at least one apparatus, pilot cell pollution within a coverage area of the plurality of small cells based on the measurements; determining, by the at least one apparatus, an adjustment of at least one transmission parameter of at least one of the plurality of small cells for reducing the pilot cell pollution, wherein the determining the adjustment comprises determining signal to interference and noise ratios (SINRs) in the coverage area for the plurality of small cells based on the set of measurements and identifying at least one value for the at least one transmission parameter that maximizes a sum of the SINRs; and transmitting, by the at least one apparatus, the adjustment to the at least one of the plurality of small cells.