# US 11,902,830 B2 · Method and apparatus for processing data unit in wireless communication system

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- Number: US 11,902,830 B2
- Document ID: US11902830B2
- Status: Granted
- Kind: B2
- Application number: 17/416,954
- Filed: 2020-01-29
- Published: 2022-03-10
- Granted: 2024-02-13
- Earliest claimed: 2019-02-12
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Geumsan Jo; Seungjune Yi
- Web page: https://patentgrep.com/patent/US11902830B2

## 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)}
- H04W 28/065: {using assembly or disassembly of packets}
- H04L 47/2441: relying on flow classification, e.g. using integrated services [IntServ]
- H04W 28/10: Flow control {between communication endpoints}
- H04L 47/34: ensuring sequence integrity, e.g. using sequence numbers
- 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

The present invention relates to a method of processing a data unit by a Service Data Adaptation Protocol (SDAP) entity of a user equipment (UE) in a wireless communication system. In particular, the method includes the steps of: receiving a SDAP Service Data Unit (SDU) from an upper layer; generating a SDAP protocol data unit (PDU) including a SDAP header and the SDAP SDU; and submitting the SDAP PDU to a lower layer, wherein the SDAP header includes a Quality of Service (QoS) Flow Identifier (QFI) field, wherein, based on that the QFI field has a specific value, the SDAP header further includes an extended QFI field having a value corresponding to the SDAP SDU.

## Claims

### Claim 1

A method for processing a data unit by a Service Data Adaptation Protocol (SDAP) entity of a user equipment (UE) in a wireless communication system, the method comprising:
receiving a SDAP Service Data Unit (SDU) from an upper layer;
generating a SDAP protocol data unit (PDU) including a SDAP header and the SDAP SDU; and
submitting the SDAP PDU to a lower layer,
wherein the SDAP header includes a Quality of Service (QoS) Flow Identifier (QFI) field,
wherein, based on the QFI field being a specific value, the SDAP header further includes an extended QFI field having a value corresponding to the SDAP SDU, and
wherein, based on the QFI field not being the specific value, the SDAP header does not include the extended QFI field and the QFI field has the value corresponding to the SDAP SDU.

### Claim 2 (depends on 1)

The method of claim 1, wherein the QFI field is included in the first octet of the SDAP header, and the extended QFI field is included in the second octet of the SDAP header.

### Claim 3 (depends on 1)

The method of claim 1, wherein a size of the QFI field is 6 bits and a size of the extended QFI field is 8 bits.

### Claim 4

A user equipment (UE) in a wireless communication system, the UE comprising:
at least one transceiver;
at least one processor; and
at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising:
receiving, by a Service Data Adaptation Protocol (SDAP) entity of the UE, a SDAP Service Data Unit (SDU) from an upper layer;
generating, by the SDAP entity of the UE, a SDAP protocol data unit (PDU) including a SDAP header and the SDAP SDU; and
submitting, by the SDAP entity of the UE, the SDAP PDU to a lower layer,
wherein the SDAP header includes a Quality of Service (QoS) Flow Identifier (QFI) field,
wherein, based on the QFI field being a specific value, the SDAP header further includes an extended QFI field having a value corresponding to the SDAP SDU, and
wherein, based on the QFI field not being the specific value, the SDAP header does not include the extended QFI field and the QFI field has the value corresponding to the SDAP SDU.

### Claim 5 (depends on 4)

The UE of claim 4, wherein the QFI field is included in the first octet of the SDAP header, and the extended QFI field is included in the second octet of the SDAP header.

### Claim 6 (depends on 4)

The UE of claim 4, wherein a size of the QFI field is 6 bits and a size of the extended QFI field is 8 bits.

### Claim 7

An apparatus for a user equipment (UE), the apparatus comprising:
at least one processor; and
at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising:
receiving, by a Service Data Adaptation Protocol (SDAP) entity of the UE, a SDAP Service Data Unit (SDU) from an upper layer;
generating, by the SDAP entity of the UE, a SDAP protocol data unit (PDU) including a SDAP header and the SDAP SDU; and
submitting, by the SDAP entity of the UE, the SDAP PDU to a lower layer,
wherein the SDAP header includes a Quality of Service (QoS) Flow Identifier (QFI) field,
wherein, based on the QFI field being a specific value, the SDAP header further includes an extended QFI field having a value corresponding to the SDAP SDU, and
wherein, based on the QFI field not being the specific value, the SDAP header does not include the extended QFI field and the QFI field has the value corresponding to the SDAP SDU.

### Claim 8

A non-transitory computer readable storage medium storing at least one computer program comprising instructions that, when executed by at least one processor, cause the at least one processor to perform operations for a user equipment (UE), the operations comprising:
receiving, by a Service Data Adaptation Protocol (SDAP) entity of the UE, a SDAP Service Data Unit (SDU) from an upper layer;
generating, by the SDAP entity of the UE, a SDAP protocol data unit (PDU) including a SDAP header and the SDAP SDU; and
submitting, by the SDAP entity of the UE, the SDAP PDU to a lower layer,
wherein the SDAP header includes a Quality of Service (QoS) Flow Identifier (QFI) field,
wherein, based on the QFI field being a specific value, the SDAP header further includes an extended QFI field having a value corresponding to the SDAP SDU, and
wherein, based on the QFI field not being the specific value, the SDAP header does not include the extended QFI field and the QFI field has the value corresponding to the SDAP SDU.

### Claim 9

A method for processing a data unit by a Service Data Adaptation Protocol (SDAP) entity of a base station (BS) in a wireless communication system, the method comprising:
receiving a SDAP protocol data unit (PDU) including a SDAP header and the SDAP service data unit (SDU) from a lower layer; and
delivering the SDAP SDU to an upper layer,
wherein the SDAP header includes a Quality of Service (QoS) Flow Identifier (QFI) field,
wherein, based on the QFI field being a specific value, the SDAP header further includes an extended QFI field having a value corresponding to the SDAP SDU, and
wherein, based on the QFI field not being the specific value, the SDAP header does not include the extended QFI field and the QFI field has the value corresponding to the SDAP SDU.

### Claim 10

A base station (BS) in a wireless communication system, the BS comprising:
at least one transceiver;
at least one processor; and
at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising:
receiving, by a Service Data Adaptation Protocol (SDAP) entity of the BS, a SDAP protocol data unit (PDU) including a SDAP header and the SDAP service data unit (SDU) from a lower layer; and
delivering, by the SDAP entity of the BS, the SDAP SDU to an upper layer,
wherein the SDAP header includes a Quality of Service (QoS) Flow Identifier (QFI) field,
wherein, based on the QFI field being a specific value, the SDAP header further includes an extended QFI field having a value corresponding to the SDAP SDU, and
wherein, based on the QFI field not being the specific value, the SDAP header does not include the extended QFI field and the QFI field has the value corresponding to the SDAP SDU.