IP Library › Granted Patent US 12,706,640
Granted Patent B2
US 12,706,640 · App. 18/392,601 · Granted Aug 11, 2026

Wireless communication device and method for network controlled beam based handover in NR

Inventors: Janne Peisa (Espoo, FI); Icaro Leonardo J. Da Silva (Solna, SE); Pradeepa Ramachandra (Linköping, SE)
Assignee: Telefonaktiebolaget LM Ericsson (publ)
H04B7/0617H04B7/0413H04W36/00835H04W36/085H04W36/302H04W72/21H04W74/02H04W74/0838H04W74/0833
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Quick Facts
Patent No.
US 12,706,640
App. No.
18/392,601
Granted
Aug 11, 2026
Kind
B2
Abstract

A method of operation of a wireless communication device to perform handover from a source cell to a target cell in a wireless communication system is provided. The wireless communication device performs ( 202 ) a beam tracking procedure for one or more neighbor cells to provide, for each neighbor cell, a list of tracked beams for the neighbor cell. The wireless communication device receives ( 212 ) a handover command from a source radio access node that instructs the wireless communication device to perform a handover from a source cell served by the source radio access node to a target cell served by a target radio access node. The target cell is one of the one or more neighbor cells for which the beam tracking procedure is performed. The wireless communication device then selects ( 214 ) a beam of the target cell from the list of tracked beams for the target cell based on random access resource configuration and/or a quality threshold. The wireless communication device then performs ( 216 ) random access on the selected beam.

Claims (7)

1 . A method of operation of a wireless communication device to perform handover from a source cell served by a source radio access node to a target cell served by a target radio access node, in a wireless communication system, comprising:

performing a beam tracking procedure for one or more neighbor cells to provide, for each neighbor cell, a list of tracked beams for the neighbor cell;

receiving a handover command from a source radio access node that instructs the wireless communication device to perform a handover from the source cell to the target cell, the target cell being one of the one or more neighbor cells for which the beam tracking procedure is performed;

selecting a beam of the target cell from the list of tracked beams for the target cell based on a random access resource configuration and/or a quality threshold; and

performing a random access procedure on the selected beam;

wherein selecting the beam of the target cell comprises:

selecting a k-th best beam in the list of tracked beams for the target cell if the k-th best beam is a beam for which dedicated random access channel resources are allocated and if the quality of the k-th best beam is greater than a threshold.