US 12,225,632 B2 · Method and user equipment for handling user plane in dual connectivity in wireless communication system

Abstract

Embodiments herein provide a method for handling a user plane by a UE configured for dual connectivity operation. The method includes receiving a RRC reconfiguration message including one or more Layer 2 indications and a Layer 2 configuration corresponding to one or more radio bearers from one of a MN and a SN involved in a dual connectivity operation of the UE. Further, the method includes performing, by the UE, one of: reestablishing of a RLC entity and a data recovery procedure for a PDCP entity corresponding to the radio bearer based on the one or more Layer 2 indications and the Layer 2 configuration received in the RRC reconfiguration message, and reestablishing of a RLC entity and reestablishing of a PDCP entity corresponding to the radio bearer based on the one or more Layer 2 indications and the Layer 2 configuration received in the RRC reconfiguration message.

Claims16

Dependent claims

A method by a user equipment (UE) performing communication with a master node (MN) and a secondary node (SN) in a wireless communication network, the method comprising:

establishing connections between the MN, the SN and the UE, the UE configured with an evolved-UMTS terrestrial radio access (E-UTRAN) and new radio access network (NR) dual connectivity (EN-DC), wherein the UE comprises radio link control (RLC) entities including an E-UTRA RLC entity and a NR RLC entity, and wherein a master cell group (MCG) bearer, a secondary cell group (SCG) bearer, or a split bearer is configured for a RLC entity;
identifying information indicating bearer type change;
in response to identifying the information indicating the bearer type change of re-establishment of a RLC entity for a radio bearer (RB), performing re-establishment of the RLC entity for the RB;
and
in response to identifying the information indicating the bearer type change of release of a RLC entity, performing the release of the RLC entity for the RB.

2 more elements

A user equipment (UE) for performing communication with a master node (MN) and a secondary node (SN) in a wireless communication network, the UE comprising:

a transceiver to transmit or receive radio signals from the MN and the SN;
and
a processor configured to:
establish connections between the MN, the SN and the UE, the UE configured with an evolved-UMTS terrestrial radio access (E-UTRAN) and new radio access network (NR) dual connectivity (EN-DC), wherein the UE comprises radio link control (RLC) entities including an E-UTRA RLC entity and a NR RLC entity, and wherein a master cell group (MCG) bearer, a secondary cell group (SCG) bearer, or a split bearer is configured for a RLC entity;
identify information indicating bearer type change;
in response to identifying the information indicating the bearer type change of re-establishment of a RLC entity for a radio bearer (RB), perform the re-establishment of the RLC entity for the RB;
and
in response to identifying the information indicating the bearer type change of release of a RLC entity, perform the release of the RLC entity for the RB.

5 more elements

Dependencies are inferred from the claim text.

Method and user equipment for handling user plane in dual connectivity in wireless communication system

Life of this patent

Method and user equipment for handling user plane in dual connectivity in wireless communication system

Life of this patent

Abstract

Claims16