Method and apparatus for establishing data transmission link and computer-readable storage medium

Patent metadata

Field	Value
Publication number	US-2022377819-A1
Application number	US-202017624419-A
Country	US
Kind code	A1
Filing date	Jun 29, 2020
Priority date	Jul 3, 2019
Publication date	Nov 24, 2022
Grant date	—

Abstract

Provided are a method and apparatus for establishing a data transmission link, and a computer-readable storage medium. By means of establishing a protocol data unit (PDU) session, a PDU session ID and a quality of service flow ID in the PDU session are encapsulated in an ID of a generic routing encapsulation (GRE) tunnel by means of GRE, and a connection between a 5G residential gateway (5G-RG) and a wireline access gateway function (W-AGF) is established through a GRE tunnel such that the GRE tunnel connection established between the 5G-RG and the W-AGF is in one-to-one correspondence with the quality of service flow of the PDU session, and user plane point-to-point connection between the 5G-RG and the W-AGF is realized in certain implementation processes.

First claim

1 . A method for establishing a data transmission link, comprising:
sending, from a 5G residential gateway (5G-RG), a protocol data unit (PDU) session establishment request message to an access and mobility management function (AMF); receiving, by the 5G-RG, a first wireline access control plane protocol (W-CP) request message sent from a wireline access gateway function (W-AGF), wherein the first W-CP request message contains a PDU session identifier (ID) and a quality of service (QoS) flow ID (QFI); and the PDU session ID and the QFI are sent from the AMF to the W-AGF; sending, from the 5G-RG, a first W-CP response message to the W-AGF; receiving, by the 5G-RG, a PDU session establishment accept message sent from the W-AGF; and establishing a connection between the 5G-RG and the W-AGF through a generic routing encapsulation (GRE) tunnel, wherein an ID of the GRE tunnel contains the PDU session ID and the QFI; and the ID of the GRE tunnel is contained in a GRE key of a GRE header.

2 . The method for establishing a data transmission link according to claim 1 , wherein the sending, from the 5G-RG, a PDU session establishment request message to the AMF comprises:
incorporating, by the 5G-RG, a PDU session establishment request message in a W-CP message, and sending the W-CP message to the W-AGF; and extracting, by the W-AGF, the PDU session establishment request message, and sending the PDU session establishment request message to the AMF.

3 . The method for establishing a data transmission link according to claim 1 , further comprising:
sending, from the 5G-RG, a PDU session modification request to the AMF; receiving, by the 5G-RG, a second W-CP request message sent from the W-AGF, wherein the second W-CP request message contains a PDU session ID and an updated QFI; and the PDU session ID and the updated QFI are sent from the AMF to the W-AGF; sending, from the 5G-RG, a second W-CP response message to the W-AGF; receiving, by the 5G-RG, a PDU session modification instruction message sent from the W-AGF; and returning, from the 5G-RG, a PDU session modification acknowledgement message to the W-AGF.

4 . The method for establishing a data transmission link according to any claim 1 , wherein the W-CP is a wireless LAN control plane protocol (WLCP).

5 . A method for establishing a data transmission link, comprising:
forwarding, by a wireline access gateway function (W-AGF), a protocol data unit (PDU) session establishment request message sent from a 5G residential gateway (5G-RG) to an access and mobility management function (AMF); wherein the PDU session establishment request message is sent from the AMF to a session management function (SMF); receiving, by the W-AGF, a first N2 session request sent from the AMF, wherein the first N2 session request contains a PDU session establishment accept message generated by the SMF according to the PDU session establishment request message sent from the 5G-RG; generating, by the W-AGF, a first wireline access control plane protocol (W-CP) request message, and sending the first W-CP request message to the 5G-RG, wherein the first W-CP request message contains a PDU session ID and a quality of service (QoS) flow ID (QFI); and the PDU session ID and the QFI are sent from the AMF to the W-AGF; receiving, by the W-AGF, a first W-CP response message sent from the 5G-RG; sending, from the W-AGF, a PDU session establishment accept message to the 5G-RG; sending, from the W-AGF, a PDU session request acknowledgement message to the AMF to acknowledge establishment of a PDU session; and establishing a connection between the W-AGF and the 5G-RG through a generic routing encapsulation (GRE) tunnel, wherein an ID of the GRE tunnel contains the PDU session ID and the QFI; and the ID of the GRE tunnel is contained in a GRE key of a GRE header.

6 . The method for establishing a data transmission link according to claim 5 , further comprising:
receiving, by the W-AGF, a second N2 session request sent from the AMF, wherein the second N2 session request is generated by the AMF according to a PDU session management context update response sent from the SMF, the PDU session management context update response is generated by the SMF according to a PDU session management context update request sent from the AMF; and the second N2 session request contains a PDU session modification instruction message sent to the 5G-RG; generating, by the W-AGF, a second W-CP request message, and sending the second W-CP request message to the 5G-RG, wherein the second W-CP request message is generated according to the second N2 session request sent from the AMF, and the second W-CP request message contains a PDU session ID and an updated QFI; receiving, by the W-AGF, a second W-CP response message sent from the 5G-RG; sending, from the W-AGF, a PDU session request response message to the AMF; sending, from the W-AGF, a PDU session modification instruction message to the 5G-RG; and receiving, by the W-AGF, the PDU session modification acknowledgement message sent from the 5G-RG and sending the PDU session modification acknowledgement message to the AMF.

7 . The method for establishing a data transmission link according to claim 5 , wherein the W-CP is a wireless local area network (LAN) control plane protocol (WLCP).

8 . A method for establishing a data transmission link, comprising:
sending, from a 5G residential gateway (5G-RG), a protocol data unit (PDU) session establishment request message to an access and mobility management function (AMF); wherein the AMF sends the PDU session establishment request message to a session management function (SMF); receiving, by a wireline access gateway function (W-AGF), a first N2 session request sent from the AMF, wherein the first N2 session request contains a PDU session establishment accept message generated by the SMF according to the PDU session establishment request message sent from the 5G-RG; generating, by the W-AGF, a first wireline access control plane protocol (W-CP) request message, and sending the first W-CP request message to the 5G-RG, wherein the first W-CP request message contains a PDU session ID and a quality of service (QoS) flow ID (QFI); and the PDU session ID and the QFI are sent from the AMF to the W-AGF; receiving, by the 5G-RG, the first W-CP request message sent from the W-AGF, and sending a first W-CP response message to the W-AGF; sending, from the W-AGF, a PDU session establishment accept message to the 5G-RG; sending, from the W-AGF, a PDU session request acknowledgement message to the AMF to acknowledge establishment of a PDU session; and establishing a connection between the 5G-RG and the W-AGF through a generic routing encapsulation (GRE) tunnel, wherein an ID of the GRE tunnel contains the PDU session ID and the QFI; and the ID of the GRE tunnel is contained in a GRE key of a GRE header.

9 . The method for establishing a data transmission link according to claim 8 , further comprising:
sending, from the 5G-RG, a PDU session modification request to the AMF which initiates a PDU session management context update request to the SMF; updating and modifying, by the SMF, corresponding PDU session resources according to the PDU session management context update request and sending a session management context update response to the AMF; sending, from the AMF, a second N2 session request to the W-AGF, wherein the second N2 session request is generated by the AMF according to the PDU session management context update response sent from the SMF; and the second N2 session request contains a PDU session modification instruction message sent to the 5G-RG; generating, by the W-AGF, a second W-CP request message, and sending the second W-CP r

Assignees

• Zte Corp

Inventors

• Zhou Xingyue
• Song Xueyan
• Liang Shuang

Classifications

• H04W76/11

  Allocation or use of connection identifiers · CPC title

• H04W80/10

  adapted for {application} session management, e.g. SIP [Session Initiation Protocol] {(connection management H04W76/00; arrangements for session management H04L67/14)} · CPC title

• H04W76/12 Primary

  Setup of transport tunnels · CPC title

• H04L12/4633 Primary

  Interconnection of networks using encapsulation techniques, e.g. tunneling · CPC title

• H04W28/0268

  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) · CPC title