Telefonaktiebolaget Lm Ericsson (publ)

Ming Li

Huaisong Zhu

Rui Fan

Bo Göransson

Muhammad Kazmi

A method and an apparatus for fault mitigation in a base station are disclosed. According to an embodiment, a faulty antenna element in an antenna array is detected. The antenna array transmits a first beam covering a predetermined range of directions. A target direction in which radiation power dropped due to a fault of the detected faulty antenna element is determined. A second beam pointing to the determined target direction is generated.

Method and apparatus for fault mitigation in base station

Methods of operating a radio access network (RAN) node in a communication network. Methods include operations of receiving valid channel data from multiple user equipment (UE) devices. The channel data includes channel impulse response distribution data corresponding to the UE devices. Operations include generating a virtual UE based on a first delay spread of a first UE device of the UE devices in a multiple user multiple input multiple output (MU-MIMO) scheduling configuration.

Delta spread-wise MU-MIMO scaling configuration

Mechanisms for calibrating radio frequency branches of a radio transceiver device in a radio access network node. The method includes co-scheduling downlink time/frequency resources for terminal devices in accordance with a set of terminal device identifiers. One of the terminal device identifiers is not of any terminal device served by the radio access network node. The downlink time/frequency resources for this terminal device identifier define time/frequency resources for calibrating the radio frequency branches. The method includes determining a difference in amplitude/phase between the radio frequency branches by analysing a signal as received via an internal coupler unit in the radio transceiver device. The signal represents the time/frequency resources as transmitted over at least some of the radio frequency branches. The method includes calibrating the radio frequency branches by adjusting an amplitude/phase setting of at least one of the radio frequency branches according to the determined difference.

Radio frequency branch calibration of a radio transceiver device

Embodiments described herein relate to methods and apparatuses for configuring communication between a base station and at least one wireless device, the base station using an antenna array, wherein antenna ports in the antenna array are coupled to radio frequency branches. The method comprises determining a first radio frequency bandwidth for a first radio frequency branch based on one or more factors associated with traffic served by a plurality of radio frequency bandwidth parts, and configuring the first radio frequency branch to serve frequencies within the first radio frequency bandwidth.

Methods and apparatuses for flexible bandwidth utilisation

Embodiments of the present disclosure provide methods and apparatuses for multiple antenna systems. A method implemented at a network device may include: transmitting at least one reference signal to at least one user equipment by using at least one muting sequence of an antenna array; receiving measurement results of the at least one reference signal corresponding to the at least one muting sequence from the at least one user equipment; selecting one muting sequence from the at least one muting sequence based on the measurement results; and applying the selected muting sequence of the antenna array.

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Stockholm, Sweden

Ming Li