Method for transmitting tcp ack packet in wireless communication system and a device therefor

Patent metadata

Field	Value
Publication number	US-2020128431-A1
Application number	US-201816490513-A
Country	US
Kind code	A1
Filing date	Feb 23, 2018
Priority date	Mar 1, 2017
Publication date	Apr 23, 2020
Grant date	—

Abstract

The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for transmitting TCP ACK packet in wireless communication system, the method comprising: receiving a packet with a first QoS flow ID for a PDU session from an upper layer, wherein a first DRB for transmitting only TCP ACK packet is configured for the PDU session; checking whether or not the received packet is a TCP ACK packet; and if the received packet is the TCP ACK packet, delivering a PDU including the received packet to a lower layer via the first DRB, wherein the first QoS flow ID of the received packet is associated with a second DRB according to QoS flow to DRB mapping rule of the PDU session.

First claim

1 . A method for a user equipment (UE) operating in a wireless communication system, the method comprising:
receiving a packet with a first Quality of Service (QoS) flow ID for a Protocol Data Unit (PDU) session from an upper layer, wherein a first Data Radio Bearer (DRB) for transmitting only Transmission Control Protocol (TCP) Acknowledgement (ACK) packet is configured for the PDU session; checking whether or not the received packet is a TCP ACK packet; and if the received packet is the TCP ACK packet, delivering a PDU including the received packet to a lower layer via the first DRB, wherein the first QoS flow ID of the received packet is associated with a second DRB according to QoS flow-to-DRB mapping rule of the PDU session.

2 . The method according to claim 1 , further comprising:
if the received packet is not the TCP ACK packet, delivering a PDU including the received packet to the lower layer via second DRB.

3 . The method according to claim 1 , wherein the first QoS flow ID is delivered with received packet to the lower layer.

4 . The method according to claim 1 , wherein the PDU is generated in a Service Data Adaptation Protocol (SDAP) entity which is a higher layer than a Packet Data Convergence Protocol (PDCP) entity of the UE.

5 . The method according to claim 1 , wherein the first DRB is used for transmitting all TCP ACK packets from all DRBs belonging to the PDU session.

6 . A user equipment (UE) for operating in a wireless communication system, the UE comprising:
a Radio Frequency (RF) module; and a processor operably coupled with the RF module and configured to: receive a packet with a first Quality of Service (QoS) flow ID for a Protocol Data Unit (PDU) session from an upper layer, wherein a first Data Radio Bearer (DRB) for transmitting only Transmission Control Protocol (TCP) Acknowledgement (ACK) packet is configured for the PDU session, check whether or not the received packet is a TCP ACK packet, and if the received packet is the TCP ACK packet, deliver a PDU including the received packet to a lower layer via the first DRB, wherein the first QoS flow ID of the received packet is associated with a second DRB according to QoS flow-to-DRB mapping rule of the PDU session.

7 . The UE according to claim 6 , wherein the processor is further configured to:
if the received packet is not the TCP ACK packet, deliver a PDU including the received packet to the lower layer via second DRB.

8 . The UE according to claim 6 , wherein the first QoS flow ID is delivered with received packet to the lower layer.

9 . The UE according to claim 6 , wherein the PDU is generated in a Service Data Adaptation Protocol (SDAP) entity which is a higher layer than a Packet Data Convergence Protocol (PDCP) entity of the UE.

10 . The UE according to claim 6 , wherein the first DRB is used for transmitting all TCP ACK packets from all DRBs belonging to the PDU session.

Assignees

• Lg Electronics Inc

Inventors

• Jo Geumsan
• Lee Sunyoung
• Yi Seungjune

Classifications

• H04W28/0263 Primary

  involving mapping traffic to individual bearers or channels, e.g. traffic flow template [TFT] · CPC title

• H04W72/1284

  Electricity · mapped topic

• H04L5/0055

  Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861) · CPC title

• H04W80/12

  Application layer protocols, e.g. WAP [Wireless Application Protocol] · CPC title

• H04W28/0268 Primary

  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) · CPC title