Power control loop stability monitoring
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorKarl Torbjörn Wigren
Life of this patent
Estimating the term…
Abstract
New load measures are provided for a base station in a wireless communication network using interference suppression receivers. The new load measures are based on the estimation of neighbor cell interference and reflect the load after interference suppression. The improved load measures are used to monitor the stability of the uplink power control loops of the user terminals served by the base station.
Claims23
A method of monitoring power control loop stability implemented by a base station serving in a cell of a wireless communication network, the method comprising:
- receiving signals from one or more user terminals;
- suppressing interference in the received signals with an interference suppression receiver to obtain reduced interference signals;
- estimating neighbor cell interference from neighboring cells;
- computing a noise rise estimate as a function of the reduced interference signals and the estimate of the neighbor cell interference;
- and
- determining power control loop stability based on the noise rise estimate.
A base station for a cell of a communication network, said base station comprising:
- an interference suppression receiver to suppress interference in signals received at the base station from one or more user terminals to obtain one or more interference suppressed signals;
- and
- a control circuit to control transmit powers of the user terminals, said control circuit comprising:
- a neighbor cell interference estimation circuit to generate an estimate of interference from neighboring cells;
- a noise rise estimation circuit to compute a noise rise for the user terminals as a function of the interference suppressed signals and the estimate of the neighbor cell interference;
- and
- a stability monitoring circuit to monitor a stability of a power control loop for the user terminals based on the noise rise.
Dependencies are inferred from the claim text.