US 12,457,530 B2
Inter-system handover involving E1 interface
Julien Muller, Rennes (FR); Alexander Vesely, Feldbach (AU); Anders Hallberg, Vreta Kloster (SE); and Stefan Eng, Linköping (SE)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 18/250,099
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Oct. 21, 2021, PCT No. PCT/IB2021/059730
§ 371(c)(1), (2) Date Apr. 21, 2023,
PCT Pub. No. WO2022/084920, PCT Pub. Date Apr. 28, 2022.
Claims priority of provisional application 63/094,755, filed on Oct. 21, 2020.
Prior Publication US 2023/0397055 A1, Dec. 7, 2023
Int. Cl. H04W 36/00 (2009.01); H04W 36/14 (2009.01)
CPC H04W 36/0022 (2013.01) [H04W 36/14 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A network node including a target central unit, CU, the target CU including a CU-control plane, CU-CP, and a CU-user plane, CU-UP, that are in communication with each other via at least one interface, the network node comprising:
processing circuitry configured to:
identify, at the CU-CP, a handover request associated with an inter-system handover;
determine, at the CU-CP, a configuration for the CU-UP to one of add and omit a service data adaptation protocol, SDAP, header for at least one inter-system data packet that is to be transmitted to a wireless device, the determination being based at least on the identification of the handover request;
cause, at the CU-CP, transmission of at least one message over the interface, the at least one message configured to:
initiate a bearer context procedure;
indicate that the bearer context procedure is associated with the inter-system handover; and
indicate the configuration of the CU-UP.