# US 11,445,557 B2 · Method and apparatus for serving quality of service (QOS) flow in a wireless communication system

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- Number: US 11,445,557 B2
- Document ID: US11445557B2
- Status: Granted
- Kind: B2
- Application number: 16/993,752
- Filed: 2020-08-14
- Published: 2020-11-26
- Granted: 2022-09-13
- Earliest claimed: 2017-07-24
- Assignees: ASUSTeK COMPUTER INC.
- Applicants: ASUSTek Computer Inc.
- Inventors: Li-Te Pan; Richard Lee-Chee Kuo
- Web page: https://patentgrep.com/patent/US11445557B2

## CPC

- H04W 76/10: Connection setup
- H04L 41/5019: Ensuring fulfilment of SLA
- 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)}
- H04W 28/12: using signalling between network elements
- H04W 76/00: Connection management
- 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

A method and apparatus are disclosed from the perspective of a network node. In one embodiment, the method includes the network node transmitting a first message with a DRB (Data Radio Bearer) configuration to a UE (User Equipment) for establishing a default DRB for a PDU (Packet Data Unit) session, wherein the DRB configuration includes a QFI (QoS Flow Id) configuration used to indicate whether a QFI field is present or not in uplink for the default DRB and the QFI configuration is always set to a value indicating the QFI field is present in uplink for the default DRB. The method further includes the network node establishing the default DRB with a presence of the QFI field in uplink. The method also includes the network node receiving a SDAP (Service Data Adaptation Protocol) PDU with the QFI field via the default DRB from the UE.

## Claims

### Claim 1

A method of a network node, comprising:
transmitting a first message with a DRB (Data Radio Bearer) configuration to a UE (User Equipment) for establishing a default DRB for a PDU (Protocol Data Unit) session, wherein the DRB configuration includes a QFI (QoS Flow Id) configuration set to a value indicating that a QFI field is present in uplink for the default DRB;
after the transmitting, establishing the default DRB with a presence of the QFI field in uplink; and
receiving a SDAP (Service Data Adaptation Protocol) PDU with the QFI field via the default DRB from the UE.

### Claim 2 (depends on 1)

The method of claim 1, wherein the network node is not allowed to transmit a second RRC message to the UE for reconfiguring the QFI configuration for the default DRB to no presence of the QFI field.

### Claim 3 (depends on 1)

The method of claim 1, wherein a header in the SDAP PDU includes at least the QFI field.

### Claim 4 (depends on 1)

The method of claim 1, wherein the network node transmits an IP (Internet Protocol) packet included in the SDAP PDU to a core network.

### Claim 5 (depends on 1)

The method of claim 1, wherein the network node is a base station.

### Claim 6

A network node, comprising:
a control circuit;
a processor installed in the control circuit; and
a memory installed in the control circuit and operatively coupled to the processor;
wherein the processor is configured to execute a program code stored in the memory to:
transmit a first message with a DRB (Data Radio Bearer) configuration to a UE (User Equipment) for establishing a default DRB for a PDU (Protocol Data Unit) session, wherein the DRB configuration includes a QFI (QoS Flow Id) configuration set to a value indicating that a QFI field is present in uplink for the default DRB;
after the transmitting, establish the default DRB with a presence of the QFI field in uplink; and
receive a SDAP (Service Data Adaptation Protocol) PDU with the QFI field via the default DRB from the UE.

### Claim 7 (depends on 6)

The network node of claim 6, wherein the network node is not allowed to transmit a second RRC message to the UE for reconfiguring the QFI configuration for the default DRB to no presence of the QFI field.

### Claim 8 (depends on 6)

The network node of claim 6, wherein a header in the SDAP PDU includes at least the QFI field.

### Claim 9 (depends on 6)

The network node of claim 6, wherein the network node transmits an IP (Internet Protocol) packet included in the SDAP PDU to a core network.

### Claim 10 (depends on 6)

The network node of claim 6, wherein the network node is a base station.

### Claim 11

A method of a UE (User Equipment), comprising:
receiving a first message with a DRB (Data Radio Bearer) configuration from a network node for establishing a default DRB for a PDU (Protocol Data Unit) session, wherein the DRB configuration includes a QFI (QoS Flow Id) configuration set to a value indicating that a QFI field is present in uplink for the default DRB;
wherein after the receiving, the default DRB is established with a presence of the QFI field in uplink; and
transmitting a SDAP (Service Data Adaptation Protocol) PDU with the QFI field via the default DRB to the network node.

### Claim 12 (depends on 11)

The method of claim 11, wherein the network node is not allowed to transmit a second RRC message to the UE for reconfiguring the QFI configuration for the default DRB to no presence of the QFI field.

### Claim 13 (depends on 11)

The method of claim 11, wherein a header in the SDAP PDU includes at least the QFI field.

### Claim 14 (depends on 11)

The method of claim 11, wherein the network node transmits an IP (Internet Protocol) packet included in the SDAP PDU to a core network.

### Claim 15 (depends on 11)

The method of claim 11, wherein the network node is a base station.

### Claim 16

A UE (User Equipment), comprising:
a control circuit;
a processor installed in the control circuit; and
a memory installed in the control circuit and operatively coupled to the processor;
wherein the processor is configured to execute a program code stored in the memory to:
receive a first message with a DRB (Data Radio Bearer) configuration from a network node for establishing a default DRB for a PDU (Protocol Data Unit) session, wherein the DRB configuration includes a QFI (QoS Flow Id) configuration set to a value indicating that a QFI field is present in uplink for the default DRB;
wherein after the receiving, the default DRB is established with a presence of the QFI field in uplink; and
transmit a SDAP (Service Data Adaptation Protocol) PDU with the QFI field via the default DRB to the network node.

### Claim 17 (depends on 16)

The UE of claim 16, wherein the network node is not allowed to transmit a second RRC message to the UE for reconfiguring the QFI configuration for the default DRB to no presence of the QFI field.

### Claim 18 (depends on 16)

The UE of claim 16, wherein a header in the SDAP PDU includes at least the QFI field.

### Claim 19 (depends on 16)

The UE of claim 16, wherein the network node transmits an IP (Internet Protocol) packet included in the SDAP PDU to a core network.

### Claim 20 (depends on 16)

The UE of claim 16, wherein the network node is a base station.