Patent ID: 9155051
Filing Date: 2015-10-06
Classification: H04L,H04W

Abstract:
1. A method of controlling congestion in a sector of a cellular telecommunication network having a plurality of radio links between a radio base station and User Equipments (UEs) operating in the sector, the method comprising the steps of: detecting by a congestion controller, that congestion exists in the sector when a current level of downlink transmit power being utilized in the sector exceeds a threshold level; and in response to detecting the congestion, reducing by the congestion controller, a downlink (DL) target Block Error Rate (BLER) Quality for a first subset of the radio links, wherein the congestion controller reduces the DL target BLER Quality for the first subset of the radio links for a first reduction time period; wherein reducing the DL target BLER Quality reduces the downlink transmit power of the first subset of the plurality of radio links; determining by the congestion controller, whether congestion still exists in the sector when the first reduction time period expires; and upon determining that congestion still exists in the sector, reducing by the congestion controller, a DL target BLER Quality for a second subset of the radio links for a second reduction time period; wherein reducing the DL target BLER Quality for the second subset reduces the downlink transmit power of the second subset of the plurality of radio links.