# US 12,193,098 B2 · Radio bearer establishment in wireless communication networks

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- Number: US 12,193,098 B2
- Document ID: US12193098B2
- Status: Granted
- Kind: B2
- Application number: 18/439,077
- Filed: 2024-02-12
- Published: 2024-06-06
- Granted: 2025-01-07
- Earliest claimed: 2017-11-15
- Assignees: Sharp Kabushiki Kaisha
- Applicants: Sharp Kabushiki Kaisha
- Inventors: Takako Hori; Shohei Yamada; Hidekazu Tsuboi
- Web page: https://patentgrep.com/patent/US12193098B2

## CPC

- H04W 16/32: Hierarchical cell structures
- H04W 76/22: Manipulation of transport tunnels
- H04W 4/50: Service provisioning or reconfiguring
- H04W 72/04: Wireless resource allocation
- H04W 72/20: Control channels or signalling for resource management
- H04W 76/11: Allocation or use of connection identifiers
- H04W 76/15: Setup of multiple wireless link connections
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A terminal apparatus that communicates with one or multiple base station apparatuses includes: a receiver configured to receive an RRC connection reconfiguration message including a DRB configuration from a base station apparatus of the one or multiple base station apparatuses; and a processing unit configured to associate an DRB that is established with an EPS bearer identity included in information of a DRB configuration in a case that information indicating that a full configuration is applied is included in the RRC connection reconfiguration message received by the receiver, a DRB identity included in the information of the DRB configuration is not present in a part of a current configuration of the terminal apparatus, and an LTE PDCP entity is established in the DRB that is established and has the DRB identity.

## Claims

### Claim 1

A terminal apparatus for communicating with one or multiple base station apparatuses, the terminal apparatus comprising:
processing circuitry; and
a receiver configured to receive a Radio Resource Control (RRC) connection reconfiguration message including, for a Data Radio Bearer (DRB) associated with a DRB identity, a New Radio (NR) Packet Data Convergence Protocol (PDCP) entity configuration or an Evolved Universal Terrestrial Radio Access (E-UTRA) PDCP entity configuration, from a base station apparatus of the one or multiple base station apparatuses, wherein
the processing circuitry is configured to notify a higher layer of information indicating that the DRB is established and an EPS bearer identity of the DRB established, based on a determination that both of the following conditions hold: a) the DRB identity is not currently configured in the terminal apparatus, and b) the E-UTRA PDCP entity configuration for the DRB is included in a DRB configuration included in the RRC connection reconfiguration message.

### Claim 2

A base station apparatus for communicating with a terminal apparatus, the base station apparatus comprising:
generation circuitry configured to generate a Radio Resource Control (RRC) connection reconfiguration message including, for a Data Radio Bearer (DRB) associated with a DRB identity, a New Radio (NR) Packet Data Convergence Protocol (PDCP) entity configuration or an Evolved Universal Terrestrial Radio Access (E-UTRA) PDCP entity configuration; and
a transmitter configured to transmit the RRC connection reconfiguration message to the terminal apparatus, wherein
the RRC connection reconfiguration message is a message that causes the terminal apparatus to:
notify a higher layer of information indicating that the DRB is established and an EPS bearer identity of the DRB established, based on a determination that both of the following conditions hold: a) the DRB identity is not currently configured in the terminal apparatus, and b) the E-UTRA PDCP entity configuration for the DRB is included in a DRB configuration included in the RRC connection reconfiguration message.

### Claim 3

A method performed at a terminal apparatus that is configured to communicate with one or multiple base station apparatuses, the method comprising:
receiving a Radio Resource Control (RRC) connection reconfiguration message including, for a Data Radio Bearer (DRB) associated with a DRB identity, a New Radio (NR) Packet Data Convergence Protocol (PDCP) entity configuration or an Evolved Universal Terrestrial Radio Access (E-UTRA) PDCP entity configuration, from a base station apparatus of the one or multiple base station apparatuses; and
notifying a higher layer of information indicating that the DRB is established and an EPS bearer identity of the DRB established, based on a determination that both of the following conditions hold: a) the DRB identity is not currently configured in the terminal apparatus, and b) the E-UTRA PDCP entity configuration for the DRB is included in a DRB configuration included in the RRC connection reconfiguration message.

### Claim 4

A method performed at a base station apparatus that is configured to communicate with a terminal apparatus, the method comprising:
generating a Radio Resource Control (RRC) connection reconfiguration message including, for a Data Radio Bearer (DRB) associated with a DRB identity, a New Radio (NR) Packet Data Convergence Protocol (PDCP) entity configuration or an Evolved Universal Terrestrial Radio Access (E-UTRA) PDCP entity configuration; and
transmitting the RRC connection reconfiguration message to the terminal apparatus, wherein
the RRC connection reconfiguration message is a message that causes the terminal apparatus to:
notify a higher layer of information indicating that the DRB is established and an EPS bearer identity of the DRB established, based on a determination that both of the following conditions hold: a) the DRB identity is not currently configured in the terminal apparatus, and b) the E-UTRA PDCP entity configuration for the DRB is included in a DRB configuration included in the RRC connection reconfiguration message.