Patent ID: 11963057
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 25:
26. A target radio network node comprising:
communication circuitry; and
processing circuitry configured to:
transmit, from the target radio network node, a handover command to a source radio network node that commands a wireless device to perform a make-before-break handover from a source link provided by the source radio network node to a target link provided by the target radio network node, the make-before-break handover comprises resetting a downlink data packet sequence number transmitter status for an unacknowledged mode bearer after or as part of the make-before-break handover; and
receive, from the source radio network node, control signaling indicating a preserved downlink data packet sequence number transmitter status at the source radio network node for the unacknowledged mode bearer,
wherein the downlink data packet sequence number transmitter/receiver status is preserved at the source radio network node for the unacknowledged mode bearer by using the same downlink data packet sequence number transmitter/receiver status for the unacknowledged mode bearer before and after the make-before-break handover.