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PDU session reconstruction method, device and system and storage medium

A session establishment request and storage technology, applied in the communication field, can solve problems such as downlink data delivery failure, data transmission failure, PDU session failure, etc., to achieve the effect of ensuring normal transmission and improving the PDU session recovery process

Pending Publication Date: 2020-04-03
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The PDU session reconstruction method, NRF, backup SMF, system, and storage medium provided by the embodiments of the present invention mainly solve the technical problem that in the related art, when the SMF fails, the PDU session fails due to the SMF failure, resulting in the inability to perform data transmission. Especially when the UPF receives the downlink data sent to the UE, the delivery of the downlink data will fail. In order to solve the above technical problems, the embodiment of the present invention provides a method for reestablishing a PDU session, including:

Method used

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  • PDU session reconstruction method, device and system and storage medium
  • PDU session reconstruction method, device and system and storage medium

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Embodiment 1

[0125] In order to solve the technical problem in the related art that when the SMF fails, the PDU session fails due to the SMF failure, and the data transmission cannot be executed, especially when the UPF receives the downlink data sent to the UE, the downlink data delivery will fail, the present invention The embodiment provides a method for reestablishing a PDU session. The method for reestablishing a PDU session provided in this embodiment is applied to the NF side. Please refer to Figure 5 shown, including:

[0126] S501: The NF obtains the standby SMF information of the active SMF; the NF is the NF that interacts with the SMF in signaling.

[0127] Due to the need of message flow interaction, NF and SMF generate message flow interaction. The types of NF include non-SMF NFs such as AMF, UDM, UPF, and PCF. The active SMF is the SMF that currently interacts with the NF for signaling.

[0128] Optionally, the standby SMF information includes at least one of the following:...

Embodiment 2

[0184] In order to solve the technical problem in the related art that when the SMF fails, the PDU session fails and the uplink and downlink data transmission fails, the embodiment of the present invention provides a PDU session reconstruction method. The PDU session reconstruction method provided in this embodiment is applied to the standby SMF side, see Figure 9 shown, including:

[0185] S901: The standby SMF receives the SMF failure notification message sent by the NF when it determines that the active SMF fails, and the NF is the NF that interacts with the SMF in signaling.

[0186] In the embodiment of the present invention, the active SMF is the SMF that currently interacts with the NF for signaling, and when the NF that interacts with the SMF for signaling detects that the active SMF fails, it sends an SMF failure notification message to the standby SMF, Instead, the standby SMF is instructed to trigger the release and reactivation of the PDU session. It should be u...

Embodiment 3

[0236] In order to solve the technical problem in the related art that when the SMF fails, the PDU session fails due to the SMF failure, and the data transmission cannot be executed, especially when the UPF receives the downlink data sent to the UE, the downlink data delivery will fail, the present invention The embodiment provides a PDU session reestablishment method. The PDU session reestablishment method provided in this embodiment is applied to the system side including NF, standby SMF and UE. Please refer to Figure 13 shown, including:

[0237] S1301: The NF acquires information about the standby SMF of the active SMF.

[0238] Due to the need of message flow interaction, NF and SMF generate message flow interaction. The types of NF include non-SMF NFs such as AMF, UDM, UPF, and PCF. The active SMF is the SMF that currently interacts with the NF for signaling.

[0239] Optionally, the standby SMF information includes at least one of the following: the SMF group identifi...

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Abstract

The embodiment of the invention provides a PDU session reconstruction method, device and system and a storage medium. The NF which generates signaling interaction with the SMF acquires standby SMF information of the primary session management function (SMF); when the NF determines that the primary SMF has a fault, the NF sends an SMF fault notification message to the standby SMF based on the standby SMF information; when the standby SMF receives the SMF fault notification message, the standby SMF triggers the release and reactivation of the PDU session. According to the invention, the failureof data transmission is avoided when the SMF fails, especially the failure of data delivery caused by the SMF failure is avoided when the UPF receives the downlink data sent to the UE, the PDU session recovery process can be effectively improved when the SMF fails, and the normal transmission of the uplink and downlink data is effectively ensured.

Description

technical field [0001] Embodiments of the present invention relate to but not limited to the communication field, and specifically relate to but not limited to a method, device, system and storage medium for reestablishing a PDU session. Background technique [0002] 3GPP (3rd Generation Partnership Project, Third Generation Partnership Project) is currently conducting research on the 5G (5th Generation) system. According to the definition of the 3GPP standard working group, the 5G system includes the wireless subsystem 5G RAN (5G Radio Access Network, 5G wireless access system), 5G core network subsystem 5GC (5G Core, 5G core network). [0003] figure 1 It is a schematic diagram of the architecture of the 5G system, which consists of several NFs (Network Functions). Among them, the 5G wireless subsystem mainly includes NR (New Radio, a new generation of wireless base station). The 5G core network subsystem mainly includes UDM (Unified Data Management, unified data manage...

Claims

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Application Information

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IPC IPC(8): H04W76/12H04W76/18H04W76/19H04W76/32
CPCH04W76/12H04W76/19H04W76/18H04W76/32
Inventor 李志军梁爽
Owner ZTE CORP
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