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

Claim 8:
9. A network node comprising:
a radio interface comprising a beamforming antenna;
a processor; and
memory,
wherein the memory stores instructions which, when executed by the processor, cause the network node to:
obtain 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 of transmitting beams having a unique beam direction;

determine a set of candidate beams for use by the network node for synchronisation signal, SS, transmission or random access channel, RACH, detection;
based on the obtained information, select one or more of the determined candidate beams, wherein selecting the 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 further cause the network node to use the selected first subset for individual narrow-beam SS transmission or RACH detection and to use the selected second subset for broad-beam SS transmission or RACH detection; and
use the one or more determined candidate beams for SS transmission or RACH detection by the network node.