US 12,089,270 B2
Method and apparatus for establishing data transmission link and computer-readable storage medium
Xingyue Zhou, Guangdong (CN); Xueyan Song, Guangdong (CN); and Shuang Liang, Guangdong (CN)
Assigned to ZTE CORPORATION, Guangdong (CN)
Appl. No. 17/624,419
Filed by ZTE CORPORATION, Guangdong (CN)
PCT Filed Jun. 29, 2020, PCT No. PCT/CN2020/098786
§ 371(c)(1), (2) Date Jan. 3, 2022,
PCT Pub. No. WO2021/000827, PCT Pub. Date Jan. 7, 2021.
Claims priority of application No. 201910595342.5 (CN), filed on Jul. 3, 2019.
Prior Publication US 2022/0377819 A1, Nov. 24, 2022
Int. Cl. H04W 76/00 (2018.01); H04L 12/46 (2006.01); H04W 76/11 (2018.01); H04W 76/12 (2018.01); H04W 80/10 (2009.01)
CPC H04W 76/12 (2018.02) [H04L 12/4633 (2013.01); H04W 76/11 (2018.02); H04W 80/10 (2013.01)] 8 Claims
OG exemplary drawing
 
1. 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,
wherein the method further comprises:
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.