# US 12,193,096 B2 · Method and apparatus for reporting buffer status report by RRC_INACTIVE state terminal in mobile wireless communication system

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- Number: US 12,193,096 B2
- Document ID: US12193096B2
- Status: Granted
- Kind: B2
- Application number: 18/423,337
- Filed: 2024-01-26
- Published: 2024-07-18
- Granted: 2025-01-07
- Earliest claimed: 2021-10-21
- Assignees: Blackpin Inc.; Soenghun Kim
- Applicants: BLACKPIN Inc.; Soenghun Kim
- Inventors: Soenghun Kim
- Web page: https://patentgrep.com/patent/US12193096B2

## CPC

- H04W 76/19: Connection re-establishment
- H04W 28/02: Traffic management, e.g. flow control or congestion control
- H04W 28/0278: {using buffer status reports (dynamic wireless traffic scheduling definition H04W72/12)}
- H04W 72/04: Wireless resource allocation
- H04W 76/20: Manipulation of established connections
- H04W 76/27: Transitions between radio resource control [RRC] states
- H04W 76/30: Connection release
- H04W 88/02: Terminal devices
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A method and apparatus for data transfer in RRC_INACTIVE state is provided. Method for data transfer in RRC_INACTIVE state includes initiating the second resume procedure, starting a first timer, receiving a RRCResume and stopping the first timer. Buffer status reporting is performed based on a first BSR configuration and a first LCG if the first timer is running and performed based on a second BSR configuration and the first LCG if the first timer is not running.

## Claims

### Claim 1

A method by a terminal, the method comprising:
receiving, by the terminal, an RRCReconfiguration, wherein the RRCReconfiguration includes one or more first Logical Channel Groups (LCGs) and a first Buffer Status Report-Config (BSR-config), and wherein each of the one or more first LCGs corresponds to at least a Data Radio Bearer (DRB);
receiving, by the terminal, an RRCRelease, wherein the RRCRelease includes first information for a second resume procedure, and wherein the first information for the second resume procedure includes a Signaling Radio Bearer2 (SRB2) indicator and a DRB list;
determining, by the terminal, radio bearers configured for the second resume procedure based on the first information for the second resume procedure;
receiving, by the terminal, system information, wherein the system information includes a first timer value, a second timer value, a first threshold, and a second threshold, and wherein the first threshold is related to a reference signal received power and the second threshold is related to a data volume;
initiating, by the terminal, the second resume procedure;
starting, by the terminal, a first timer after applying a second BSR-config;
receiving, by the terminal, an RRCResume; and
stopping, by the terminal, the first timer,
wherein the terminal performs buffer status reporting based on:
the second BSR-config and the first LCGs in case that the first timer is running; and
the first BSR-config and the first LCGs in case that the first timer is not running.

### Claim 2 (depends on 1)

The method of claim 1,
wherein the second resume procedure is initiated when all conditions of a first condition group are fulfilled,
wherein the first condition group includes:
a reference signal received power being greater than the first threshold;
a data volume being smaller than the second threshold; and
second resume procedure related information being included in the system information, and wherein the second resume procedure related information includes the first threshold and the second threshold.

### Claim 3

A terminal in a wireless communication system, the terminal comprising:
a transceiver configured to transmit and receive a signal; and
a controller configured to control the transceiver to:
receive an RRCReconfiguration, wherein the RRCReconfiguration includes one or more first Logical Channel Groups (LCGs) and a first Buffer Status Report-Config (BSR-config), and wherein each of the one or more first LCGs corresponds to at least a Data Radio Bearer (DRB);
receive an RRCRelease, wherein the RRCRelease includes first information for a second resume procedure, and wherein the first information for the second resume procedure includes a Signaling Radio Bearer2 (SRB2) indicator and a DRB list;
determine radio bearers configured for the second resume procedure based on the first information for the second resume procedure;
receive system information, wherein the system information includes a first timer value, a second timer value, a first threshold, and a second threshold, and wherein the first threshold is related to a reference signal received power and the second threshold is related to a data volume;
initiate the second resume procedure;
start a first timer after applying a second BSR-config;
receive an RRCResume; and
stop the first timer,
wherein the terminal performs buffer status reporting based on:
the second BSR-config and the first LCGs in case that the first timer is running; and
the first BSR-config and the first LCGs in case that the first timer is not running.