Dual connectivity in fifth generation (5G) new radio (NR) wireless networks
A base station apparatus for communicating with a terminal apparatus transmits a Radio Resource Control (RRC) connection reconfiguration request message including a Data Radio Bearer (DRB) configuration to the terminal apparatus. The DRB configuration includes a DRB identity and a Packet Data Convergence Protocol Layer (PDCP) entity configuration corresponding to the DRB identity. PDCP entity configuration information includes one of a PDCP entity configuration for Evolved Universal Terrestrial Radio Access (E-UTRA) and a PDCP entity configuration for New Radio (NR). A PDCP entity is established in accordance with the PDCP entity configuration information.
1. A base station apparatus that supports Evolved Universal Terrestrial Radio Access New Radio Dual Connectivity (EN-DC), comprising:
communication circuitry configured to transmit, to a terminal apparatus, a Radio Resource Control (RRC) connection reconfiguration message including a Data Radio Bearer (DRB) configuration, wherein
the DRB configuration is a configuration for establishing a Master Cell Group (MCG) bearer for the EN-DC,
the DRB configuration includes a DRB identity and a Packet Data Convergence Protocol Layer (PDCP) entity configuration associated with the DRB identity,
the PDCP entity configuration is a new radio (NR) PDCP entity configuration for an NR PDCP entity, and
the NR PDCP entity is established for the MCG bearer.
2. A method performed by a base station apparatus that supports Evolved Universal Terrestrial Radio Access New Radio Dual Connectivity (EN-DC), the method comprising:
transmitting, to a terminal apparatus, a Radio Resource Control (RRC) connection reconfiguration message including a Data Radio Bearer (DRB) configuration, wherein
the DRB configuration is a configuration for establishing a Master Cell Group (MCG) bearer for the EN-DC,
the DRB configuration includes a DRB identity and a Packet Data Convergence Protocol Layer (PDCP) entity configuration associated with the DRB identity,
the PDCP entity configuration is a new radio (NR) PDCP entity configuration for an NR PDCP entity, and
the NR PDCP entity is established for the MCG bearer.