| US 11,812,313 B2 | ||
| Data forwarding during inter-system handovers | ||
| Punyaslok Purkayastha, San Diego, CA (US); and Xipeng Zhu, San Diego, CA (US) | ||
| Assigned to QUALCOMM INCORPORATED, San Diego, CA (US) | ||
| Filed by QUALCOMM Incorporated, San Diego, CA (US) | ||
| Filed on Aug. 10, 2021, as Appl. No. 17/444,804. | ||
| Prior Publication US 2023/0050959 A1, Feb. 16, 2023 | ||
| Int. Cl. H04W 36/00 (2009.01) | ||
| CPC H04W 36/0066 (2013.01) [H04W 36/0033 (2013.01)] | 30 Claims |
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1. An apparatus for wireless communication at an source master eNodeB (MeNB), comprising:
a memory; and one or more processors, coupled to the memory, configured to:
transmit, to a target Next Generation radio access network (NG-RAN) node, a handover required message to initiate an inter-system handover from an evolved-Universal Mobile Telecommunications System (UMTS) terrestrial radio access network (E-UTRAN) New Radio (NR) dual connectivity (EN-DC) system associated with the source MeNB to an NR standalone (SA) system associated with the target NG-RAN node, the source MeNB having an indirect path to the target NG-RAN node and a source secondary gNodeB (SgNB) having a direct path to the target NG-RAN node;
transmit, to the target NG-RAN node and based at least in part on the handover required message, forwarded data via the indirect path between the source MeNB and the target NG-RAN node through a core network, the indirect path being configured for indirect data forwarding for master node (MN) terminated bearers; and
receive, from a network entity, addresses for direct data forwarding for secondary node (SN) terminated bearers.
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