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KR-102963543-B1 - Methods and systems for multi-access protocol data unit sessions

KR102963543B1KR 102963543 B1KR102963543 B1KR 102963543B1KR-102963543-B1

Abstract

A wireless communication method for use in a session management function is disclosed. The method includes the step of transmitting a steering rule for uplink data associated with a first protocol data unit session anchor of a multi-access protocol data unit session to a wireless terminal, wherein the multi-access protocol data unit session is associated with a first protocol data unit session anchor and a second protocol data unit session anchor.

Inventors

  • 조우 싱유에
  • 주 징구오
  • 왕 멩한
  • 리앙 슈앙

Assignees

  • 지티이 코포레이션

Dates

Publication Date
20260511
Application Date
20210805

Claims (20)

  1. In a wireless communication method for use in a session management function unit, A step of transmitting to a wireless terminal a steering rule for uplink data associated with a first protocol data unit session anchor of a multi-access protocol data unit session. Includes, The above multi-access protocol data unit session is associated with the first protocol data unit session anchor and the second protocol data unit session anchor, and The above steering rule is transmitted in response to the insertion of a branch point or uplink classifier in the multi-access protocol data unit session, and A wireless communication method for use in a session management function unit, wherein the above steering rule indicates avoiding the use of a multipath transmission control protocol (MPTCP) function to steer the uplink data associated with the first protocol data unit session anchor.
  2. In paragraph 1, The above steering rule indicates using an access traffic steering, switching, splitting (ATSS) function to steer the uplink data associated with the first protocol data unit session anchor, and The above steering rule indicates steering the uplink data associated with the first protocol data unit session anchor to a branch point or uplink classifier, wherein the branch point or uplink classifier is included in the first protocol data unit session anchor or deployed independently. A wireless communication method, at least one of which is one of the following.
  3. In paragraph 1 or 2, A wireless communication method wherein the uplink data associated with the first protocol data unit session anchor comprises at least one of a prefix associated with the first protocol data unit session anchor and at least one Internet protocol address associated with the first protocol data unit session anchor.
  4. In paragraph 1 or 2, The step of transmitting tunnel information associated with a branch point or uplink classifier associated with the first protocol data unit session anchor to a wireless network node and a gateway that access the data network, wherein the wireless terminal above transmits the above-mentioned information to the wireless network node and gateway that access the data network. A wireless communication method further comprising
  5. In paragraph 1 or 2, The step of transmitting the steering rule to the second protocol data unit session anchor; and A step of transmitting to at least one of the wireless terminal and the second protocol data unit session anchor an indication that the steering rule is removed after the branch point or uplink classifier associated with the first protocol data unit session anchor is removed. A wireless communication method comprising at least one more of the following.
  6. In a wireless communication method for use in a wireless terminal, A step of receiving a steering rule for uplink data associated with a first protocol data unit session anchor of a multi-access protocol data unit session from a session management function unit; and A step of steering the uplink data associated with the first protocol data unit session anchor based on the above steering rule Includes, The above multi-access protocol data unit session is associated with the first protocol data unit session anchor and the second protocol data unit session anchor, and The above steering rule is received in response to the insertion of a branch point or uplink classifier in the multi-access protocol data unit session, and A wireless communication method for use in a wireless terminal, wherein the above steering rule indicates avoiding the use of a multipath transmission control protocol (MPTCP) function to steer the uplink data associated with the first protocol data unit session anchor.
  7. In paragraph 6, A wireless communication method in which the above steering rule indicates using an access traffic steering, switching, splitting (ATSS) function to steer the uplink data associated with the first protocol data unit session anchor.
  8. In paragraph 6 or 7, The above steering rule indicates steering the uplink data associated with the first protocol data unit session anchor to a branch point or uplink classifier, and A wireless communication method in which the above branch point or the above uplink classifier is included in the above first protocol data unit session anchor or deployed independently.
  9. In paragraph 6 or 7, A wireless communication method wherein the uplink data associated with the first protocol data unit session anchor comprises at least one of a prefix associated with the first protocol data unit session anchor and at least one Internet protocol address associated with the first protocol data unit session anchor.
  10. In paragraph 6 or 7, A step of receiving an indication from the session management function unit that the steering rule is removed after the branch point or uplink classifier associated with the first protocol data unit session anchor is removed. A wireless communication method further comprising
  11. In a wireless device including a session management function unit, A communication unit configured to transmit a steering rule for uplink data associated with a first protocol data unit session anchor of a multi-access protocol data unit session to a wireless terminal. Includes, The above multi-access protocol data unit session is associated with the first protocol data unit session anchor and the second protocol data unit session anchor, and The above steering rule is transmitted in response to the insertion of a branch point or uplink classifier in the multi-access protocol data unit session, and A wireless device comprising a session management function, wherein the above steering rule indicates avoiding the use of a multipath transmission control protocol (MPTCP) function to steer the uplink data associated with the first protocol data unit session anchor.
  12. In Paragraph 11, A processor configured to perform the wireless communication method of paragraph 2 A wireless device that further includes
  13. In wireless terminals, A communication unit configured to receive, from a session management function unit, a steering rule for uplink data associated with a first protocol data unit session anchor of a multi-access protocol data unit session; and A processor configured to steer the uplink data associated with the first protocol data unit session anchor based on the above steering rule. Includes, The above multi-access protocol data unit session is associated with the first protocol data unit session anchor and the second protocol data unit session anchor, and The above steering rule is received in response to the insertion of a branch point or uplink classifier in the multi-access protocol data unit session, and A wireless terminal in which the above steering rule indicates avoiding the use of a multipath transmission control protocol (MPTCP) function to steer the uplink data associated with the first protocol data unit session anchor.
  14. In Paragraph 13, The above processor is also a wireless terminal configured to perform the wireless communication method of claim 7.
  15. In a computer-readable program storage medium in which code is stored, A computer-readable program storage medium in which the above code, when executed by a processor, enables the processor to implement the wireless communication method described in any one of claims 1, 2, 6 and 7.
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Description

Methods and systems for multi-access protocol data unit sessions This document is generally about wireless communications, and in particular about multiaccess protocol data unit (MA PDU) sessions. Access traffic steering, switching and splitting (ATSS) features may be supported by user equipment (UE) and/or a 5G core (5GC) network that enables MA PDU services for exchanging PDUs between a UE and a data network by simultaneously using one 3rd generation partner project (3GPP) access network, one non-3GPP access network, and two independent N3/N9 tunnels between a PDU session anchor (PSA) and a radio access network/access network (RAN/AN). Multi-access PDU access services are realized by establishing an MA PDU session, that is, a PDU session that may have user plane resources on two access networks. When a UE is registered through both 3GPP access and non-3GPP access, or when a UE is registered through only one access, the UE may request an MA PDU session. After the MA PDU session is established and user plane resources exist on both access networks, the UE applies policies provided by the network (i.e., ATSSS rules) and considers local conditions (e.g., network interface availability, signal loss conditions, user preferences, etc.) to determine how to distribute uplink traffic across the two access networks. Similarly, the PSA of the MA PDU session applies policies provided by the network (i.e., N4 rules) and feedback information received from the UE via the user plane (e.g., access network unavailability or availability) to determine how to distribute downlink traffic across the two N3/N9 tunnels and the two access networks. When user plane resources exist on only one access network, the UE applies ATSSS rules and considers local conditions to trigger the establishment or activation of user plane resources through the other access. In certain scenarios, a branching point (BP) or an uplink classifier (UL CL) may be inserted into the data path(s) of an MA-PDU session. However, it is unclear how ATSSS rules are performed or adjusted when BP/UL CL are inserted into the data path(s) of an MA PDU session. This document relates to methods, systems, and devices for MA PDU sessions, and in particular to methods, systems, and devices for updating steering rules for MA PDU sessions. The present disclosure relates to a wireless communication method for use in a session management function unit. The method comprises the step of transmitting to a wireless terminal a steering rule for uplink data associated with a first protocol data unit session anchor of a multi-access protocol data unit session, wherein the multi-access protocol data unit session is associated with a first protocol data unit session anchor and a second protocol data unit session anchor. Various embodiments may preferably implement the following features: Preferably, the steering rule is transmitted in response to the insertion of a branch point or uplink classifier in a multi-access protocol data unit session. Preferably, the steering rule indicates using the Access Traffic Steering, Switching, and Splitting (ATSSS) function to steer uplink data associated with the first protocol data unit session anchor. Preferably, the steering rule indicates avoiding the use of Multipath Transmission Control Protocol (MPTCP) functions to steer uplink data associated with the first protocol data unit session anchor. Preferably, the steering rule indicates steering the uplink data associated with the first protocol data unit session anchor to the branch point or uplink classifier. Preferably, the branch point or uplink classifier is included in the first protocol data unit session anchor or deployed independently. Preferably, the uplink data associated with the first protocol data unit session anchor includes at least one of a prefix associated with the first protocol data unit session anchor and at least one Internet protocol address associated with the first protocol data unit session anchor. Preferably, the wireless communication method further includes the step of transmitting tunnel information associated with a branch point or uplink classifier associated with a first protocol data unit session anchor to a wireless network node and a gateway to which the wireless terminal accesses a data network. Preferably, the wireless communication method further includes the step of transmitting a steering rule to a second protocol data unit session anchor. Preferably, the wireless communication method further includes the step of transmitting to at least one of the wireless terminal and the second protocol data unit session anchor an indication that the steering rule is removed after the branch point or uplink classifier associated with the first protocol data unit session anchor is removed. The present disclosure relates to a wireless communication method for use in a wireless terminal. The method comprises receiving, from a session management function, a steering rule for