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

AI Technical Summary

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 inabilit

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

Examples

Experimental program
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Example Embodiment

[0124] Example one:

[0125] In order to solve the technical problem of the failure of the PDU session due to the SMF failure in the related art when the SMF fails, the data transmission cannot be performed, especially when the UPF receives the downlink data sent to the UE, the downlink data delivery fails, the present invention The embodiment provides a PDU session re-establishment method. The PDU session re-establishment method 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 primary SMF; the NF is the NF that generates signaling interaction with the SMF.

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

[0128] Optionally, the backup SMF information includes at least one of ...

Example Embodiment

[0183] Embodiment two:

[0184] In order to solve the technical problem of the failure of the PDU session when the SMF fails, and the failure of the uplink and downlink data transmission in the related art, an embodiment of the present invention provides a PDU session reestablishment method, and the PDU session reestablishment method provided in this embodiment is applied to standby SMF side, see Picture 9 Shown, including:

[0185] S901: The standby SMF receives the SMF failure notification message sent by the NF when it determines that the primary SMF fails. NF is the NF that generates signaling interaction with the SMF.

[0186] In the embodiment of the present invention, the primary SMF is the SMF that currently generates signaling interaction with the NF. When the NF generating signaling interaction with the SMF detects that the primary SMF fails, it sends an SMF failure notification message to the backup SMF. Instructing the standby SMF to trigger the release and reactivation...

Example Embodiment

[0235] Embodiment three:

[0236] In order to solve the technical problem of the failure of the PDU session due to the SMF failure in the related art when the SMF fails, the data transmission cannot be performed, especially when the UPF receives the downlink data sent to the UE, the downlink data delivery fails, the present invention The embodiment provides a PDU session re-establishment method. The PDU session re-establishment 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 obtains the standby SMF information of the main SMF.

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

[0239] Optionally, the backup SMF information includes at least one of the following: the SMF grou...

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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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