# US 11,115,855 B2 · Method for transmitting UL packet based on quality of service (QoS) flow in wireless communication system and a device therefor

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- Number: US 11,115,855 B2
- Document ID: US11115855B2
- Status: Granted
- Kind: B2
- Application number: 16/477,858
- Filed: 2018-01-11
- Published: 2020-04-23
- Granted: 2021-09-07
- Earliest claimed: 2017-01-13
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Seungjune Yi; Heejeong Cho; Sunyoung Lee
- Web page: https://patentgrep.com/patent/US11115855B2

## CPC

- H04W 28/0268: {using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR] (negotiating SLA or negotiating QoS H04W28/24)}
- H04L 47/2483: involving identification of individual flows
- H04L 47/2491: Mapping quality of service [QoS] requirements between different networks
- H04W 28/0252: {per individual bearer or channel (dynamic wireless traffic scheduling H04W72/12)}
- H04W 28/0263: {involving mapping traffic to individual bearers or channels, e.g. traffic flow template [TFT]}
- H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network
- H04W 76/27: Transitions between radio resource control [RRC] states
- 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)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

Disclosed embodiments include a method and a device for transmitting UL packet based on QoS flow, the method including receiving uplink (UL) packet from an upper layer; checking whether a IP flow of the UL packet is matched to any of UL IP flow to QoS flow mapping defined in QoS rules configured to the UE; setting a QoS Flow ID of the UL packet to a special value if a IP flow of the UL packet is not matched to any of UL IP flow to QoS flow mapping defined in the QoS rules configured to the UE; and transmitting the UL packet with the QoS Flow ID set to the special value to a network via a DRB. The UE is capable of communicating with at least one of another UE, a UE related to an autonomous driving vehicle, a base station or a network.

## Claims

### Claim 1

A method for a user equipment (UE) operating in a wireless communication system, the method comprising:
receiving uplink (UL) packet from an upper layer;
checking whether an IP flow of the UL packet is matched to any IP flows for a single data radio bearer (DRB) that are defined in UL IP flow to QoS flow mapping rules configured to the UE;
setting a QoS Flow ID of the UL packet to a special value based on the IP flow of the UL packet not matching to any of the IP flows for the single DRB that are defined in the UL IP flow to QoS flow mapping rules configured to the UE; and
transmitting the UL packet with the QoS Flow ID set to the special value to a network via the single DRB as a default DRB based on the special value not matching to any of QoS flow IDs defined in UL QoS flow to DRB mapping rule configured to the UE,
wherein the special value is a predetermined value used to notify the network that the IP flow of the UL packet is not matched to any of the IP flows for the single DRB that are defined in the UL IP flow to QoS flow mapping rules configured to the UE, and
wherein the UL packet transmitted via the default DRB has a QoS flow ID of which all bit of a field is set to ‘0’, or a QoS flow ID of which all bit of a field is set to ‘1’.

### Claim 2 (depends on 1)

The method according to claim 1, wherein based on the special value being one of QoS flow IDs for the single DRB that are defined in UL QoS flow to DRB mapping rule configured to the UE, the single DRB is a DRB mapped to the special value.

### Claim 3

A User Equipment (UE) for operating in a wireless communication system, the UE comprising:
a transceiver; and
a processor operably coupled with the transceiver and configured to:
receive uplink (UL) packet from an upper layer,
check whether an IP flow of the UL packet is matched to any IP flows for a single data radio bearer (DRB) that are defined in UL IP flow to QoS flow mapping rule configured to the UE,
set a QoS Flow ID of the UL packet to a special value based on the IP flow of the UL packet not matching to any of the IP flows for the single DRB that are defined in the UL IP flow to QoS flow mapping rule configured to the UE, and
transmit the UL packet with the QoS Flow ID set to the special value to a network via the single DRB as a default DRB based on the special value not matching to any of QoS flow IDs defined in UL QoS flow to DRB mapping rule configured to the UE,
wherein the special value is a predetermined value used to notify the network that the IP flow of the UL packet is not matched to any of the IP flows for the single DRB that are defined in the UL IP flow to QoS flow mapping rules configured to the UE, and
wherein the UL packet transmitted via the default DRB has a QoS flow ID of which all bit of a field is set to ‘0’, or a QoS flow ID of which all bit of a field is set to ‘1’.

### Claim 4 (depends on 3)

The UE according to claim 3, wherein based on the special value being one of QoS flow IDs for the single DRB that are defined in UL QoS flow to DRB mapping rule configured to the UE, the single DRB is a DRB mapped to the special value.

### Claim 5 (depends on 3)

The UE according to claim 3, wherein the UL packet belongs to a PDU session for which UL packets with no matching of IP flow to QoS flow mapping rule are allowed to be transmitted to the network.