Terminal apparatus, base station apparatus, and method that enable efficient control of MSB by using NR

Inventors: Takako Hori (Sakai City, JP); Shohei Yamada (Sakai City, JP); Hidekazu Tsuboi (Sakai City, JP); Kyosuke Inoue (Sakai City, JP)

Assignee: SHARP KABUSHIKI KAISHA

H04W76/30 H04W76/40

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Quick Facts

Patent No.: US 12684650
App. No.: 18/565,782
Granted: Jul 14, 2026
Kind: B2

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Abstract

A terminal apparatus for communicating with a base station apparatus includes a receiver configured to receive a Radio Resource Control (RRC) release message from the base station apparatus, and a processing unit. The processing unit establishes a radio bearer for a Multicast Broadcast service (MBS) for delivery mode 1. The processing unit determines whether or not a suspend configuration parameter is included in the RRC release message, and in a case that the processing unit determines that the suspend configuration parameter is included, the processing unit suspends the radio bearer for the MBS for the delivery mode 1, and in a case that the processing unit determines that the suspend configuration parameter is not included, the processing unit does not suspend the radio bearer for the MBS for the delivery mode 1. The suspend configuration parameter is a parameter indicating a configuration for an RRC_INACTIVE state.

Claims (28)

1 . A terminal apparatus for communicating with a base station apparatus, the terminal apparatus comprising:

a receiver configured to receive a first Radio Resource Control (RRC) message and an RRC release message from the base station apparatus; and

a processor, wherein

the processor is configured to establish a radio bearer for a Multicast Broadcast Service (MBS) for delivery mode 1 according to the first RRC message,

the first RRC message is transmitted from the base station apparatus using a Dedicated Control Channel (DCCH) logical channel,

the delivery mode 1 is used for delivery of multicast,

the processor is configured to determine whether or not a suspend configuration parameter is included in the RRC release message,

in a case of determining that the suspend configuration parameter is included in the RRC release message, the processor suspends the radio bearer for the MBS for the delivery mode 1,

in a case of determining that the suspend configuration parameter is not included in the RRC release message, the processor does not suspend the radio bearer for the MBS for the delivery mode 1, and

the suspend configuration parameter indicates a configuration for an RRC_INACTIVE state.

2 . A base station apparatus for communicating with a terminal apparatus, the base station apparatus comprising:

a transmitter configured to transmit a first Radio Resource Control (RRC) message and an RRC release message to the terminal apparatus; and

a processor, wherein

the processor is configured to cause the terminal apparatus to establish a radio bearer for a Multicast Broadcast Service (MBS) for delivery mode 1 according to the first RRC message,

the first RRC message is transmitted to the terminal apparatus using a Dedicated Control Channel (DCCH) logical channel,

the delivery mode 1 is used for delivery of multicast,

the processor is configured to cause the terminal apparatus to determine whether or not a suspend configuration parameter is included in the RRC release message,

in a case that the suspend configuration parameter is included in the RRC release message, the processor causes the terminal apparatus to suspend the radio bearer for the MBS for the delivery mode 1,

in a case that the suspend configuration parameter is not included in the RRC release message, the processor causes the terminal apparatus not to suspend the radio bearer for the MBS for the delivery mode 1, and

the suspend configuration parameter indicates a configuration for an RRC_INACTIVE state.

3 . A method for a terminal apparatus for communicating with a base station apparatus, the method comprising:

receiving a first Radio Resource Control (RRC) message and an RRC release message from the base station apparatus;

establishing a radio bearer for a Multicast Broadcast Service (MBS) for delivery mode 1 according to the first RRC message,

wherein the first RRC message is transmitted from the base station apparatus using a Dedicated Control Channel (DCCH) logical channel, and the delivery mode 1 is used for delivery of multicast;

determining whether or not a suspend configuration parameter is included in the RRC release message;

in a case of determining that the suspend configuration parameter is included in the RRC release message, suspending the radio bearer for the MBS for the delivery mode 1; and

in a case of determining that the suspend configuration parameter is not included in the RRC release message, not suspending the radio bearer for the MBS for the delivery mode 1,

wherein the suspend configuration parameter indicates a configuration for an RRC_INACTIVE state.