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Methods for releasing IP (Internet Protocol) address, devices, network equipment and system

A technology of network equipment and IP address, applied in the field of communication, can solve the problem of inaccurate release time of IP address, etc.

Active Publication Date: 2019-03-29
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present application provides a method, device, network device and system for releasing an IP address to solve the problem of inaccurate IP address release time

Method used

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  • Methods for releasing IP (Internet Protocol) address, devices, network equipment and system
  • Methods for releasing IP (Internet Protocol) address, devices, network equipment and system
  • Methods for releasing IP (Internet Protocol) address, devices, network equipment and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0153] Embodiment 1 provides a method for releasing an IP address, such as Figure 9 As shown, the method may include:

[0154] 1101. The SMF determines that the PDU session anchor needs to be relocated from the first UPF.

[0155] Wherein, before step 1101, there is already a first PDU session, and the terminal uses the first IP address to transmit service data flow in the first PDU session.

[0156] Specifically, the SMF can determine the PDU session anchor point when the terminal moves out of the coverage of the first UPF, or when the load of the first UPF is large, or when the terminal is far away from the first UPF It needs to be relocated from the first UPF, and in other cases, it is determined that the PDU session anchor needs to be relocated from the first UPF, which will not be described here.

[0157] The following step 1102a and step 1102b are optional steps, one of which is to be executed. For example, when the application scenario of the method is a multi-PDU s...

Embodiment 2

[0180] Embodiment 2 provides a method for releasing an IP address, such as Figure 10 As shown, the method may include: Steps 1201-1208b.

[0181] Steps 1201-1204 can refer to Figure 9 Description of steps 1101-1104 in .

[0182] Wherein, step 1201 is the same as step 1101; when the application scenario of the method is a multi-PDU session scenario, execute 1202a, and step 1202a is the same as step 1102a; when the application scenario of the method is a multi-homing PDU session or a UL CL PDU session scenario , execute step 1202b, step 1202b is the same as step 1102b; step 1203 is the same as step 1103; step 1204 is the same as step 1104.

[0183] 1205. The terminal determines that the connection state of the terminal is an idle state, and the terminal releases the first IP address and synchronizes the connection state of the terminal with the AMF.

[0184] Wherein, the connection state of the terminal can be an idle state or a connected state. It should be noted that once...

Embodiment 3

[0192] Embodiment 3 provides a method for releasing an IP address, such as Figure 11 As shown, the method may include: Steps 1301-1309b.

[0193] Steps 1301-1304 can refer to Figure 9 Description of steps 1101-1104 in .

[0194] Wherein, step 1301 is the same as step 1101; when the application scenario of the method is a multi-PDU session scenario, perform step 1302a, and step 1302a is the same as step 1102a; when the application scenario of the method is a multi-homing PDU session or UL CLPDU session scenario , execute step 1302b, step 1302b is the same as step 1102b; step 1303 is the same as step 1103; step 1304 is the same as step 1104.

[0195] 1305. The SMF determines that the state of the first PDU session is a deactivated state.

[0196] The state of the PDU session can be deactivated state and activated state. When the state of the PDU session is deactivated, the data on all the PDU sessions will not be transmitted, and the IP address of the terminal can be releas...

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Abstract

The invention relates to the technical field of communication and discloses methods for releasing an IP (Internet Protocol) address, devices, network equipment and a system. The problem that IP address release time is inaccurate is solved. A method comprises the steps that first network equipment determines that a PDU (Packet Data Unit) session anchor needs to be repositioned from a first user plane function entity, wherein the first user plane function entity is a PDU session anchor of a first PDU session of a terminal; the first network equipment determines that a first IP address of the terminal is not employed, wherein the first IP address is the IP address employed by the terminal in the first PDU session; and the first network equipment releases the first IP address.

Description

technical field [0001] The present application relates to the technical field of communications, and in particular to a method, device, network device and system for releasing an Internet protocol (internet protocol, IP) address. Background technique [0002] A packet data unit (packet data unit, PDU) session is connected to a data network (data network, DN) through a PDU session anchor point, and the relocation process of the PDU session anchor point of the PDU session involves the release of an IP address. For example, in the scenario of multiple PDU sessions, during the relocation process of the PDU session anchor point, it is necessary to establish a new PDU session, release the old PDU session, and release the IP address used by the terminal in the old PDU session. [0003] In the existing solution, the network side uses a timer to determine the time point for releasing the IP address. However, the duration of the timer is determined based on experience, which is not ac...

Claims

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Application Information

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IPC IPC(8): H04W8/26H04W76/32H04L29/12
CPCH04W8/26H04L61/5053H04W76/00H04L61/5007H04W76/20
Inventor 朱强华刘睿智李岩
Owner HUAWEI TECH CO LTD
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