Patent ID: 11909487
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method performed by a network node for beamforming, the method comprising:
obtaining, at the network node, information relating to a plurality of signals received or transmitted using a set of receiving beams or a set of transmitting beams of the network node, wherein the information relates to one or more of:
path loss between a receiving device and the network node;
signal strength of a signal of the plurality of signals transmitted by the network node; and
a random access success ratio for a beam of the set of beams used by the network node to transmit the plurality of signals and the information is derived from multiple measurements performed over a period of time; and
each individual beam of the set having a unique beam direction;

determining a set of candidate beams for use by the network node for synchronization signal, SS, transmission or random access channel, RACH detection;
based on the obtained information, selecting one or more of the determined candidate beams, wherein selecting one or more of the candidate beams comprises selecting a first subset of the set of candidate beams and selecting a second subset of the set of candidate beams, and wherein using the selected one or more of the determined candidate beams for SS transmission or RACH detection by the network node comprises using the selected first subset for individual narrow-beam SS transmission or RACH detection and using the selected second subset for broad-beam SS transmission or RACH detection; and

using the selected one or more of the determined candidate beams for SS transmission or RACH detection by the network node.