Patent ID: 9019905
Filing Date: 2015-04-28
Classification: H04L,H04W

Abstract:
1. A method in a network node of a heterogeneous wireless communication system, for reducing uplink interference at a radio base station with restricted wireless access, the uplink interference being caused by a user equipment served by the network node, wherein the user equipment has a restricted wireless access to the radio base station, the method comprising: receiving measurement reports from one or more user equipments served by the network node, identifying a user equipment causing uplink interference at the radio base station among said one or more user equipments, based on the received measurement reports, obtaining information relating to a total uplink received interference from the radio base station via the identified user equipment; adjusting at least one of a transmit power, a transmission activity, and a scheduling of the identified user equipment based on the obtained information, such that the uplink interference caused by the identified user equipment is reduced, wherein obtaining information relating to the total uplink received interference comprises: transmitting a request to the identified user equipment to acquire said information from the radio base station when a signal measurement exceeds a first threshold, and receiving said information from the identified user equipment, wherein the signal measurement is associated with the neighbour cell identifier corresponding to the radio base station, and is at least one of a received signal strength measurement and a received signal quality measurement from the measurement reports; and measurement reports; and wherein adjusting comprises: comparing the total uplink received interference at the radio base station with a second threshold, said total uplink received interference being determined based on the obtained information and on the measurement reports received from the identified user equipment, and adjusting at least one of the transmit power, the transmission activity, and the scheduling if said total uplink received interference exceeds the second threshold.