5G PDU Session Reactivation via AMF for Idle UE
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 5G networks using N3GPP access networks, there is no existing solution for user equipment to switch from an idle state to a connected state when downlink data is received, leading to transmission failures due to released network resources.
Innovation Solution
A connection reactivation method involving an access and mobility management function entity that sends messages to user equipment to reactivate PDU sessions using N3GPP or 3GPP access networks, ensuring successful downlink data transmission by instructing the user equipment to switch from an idle to a connected state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If user equipment switches to idle state to save network resources and reduce energy consumption, then network resources and energy are saved, but downlink data transmission fails because resources are released
Solution Approach 1:
The access and mobility management function entity performs preliminary actions by storing reactivation indications and preparing connection reactivation parameters before downlink data arrives. When user equipment is in idle state, the system pre-configures the reactivation process so that when data needs to be transmitted, the connection can be quickly reestablished without transmission failure
Solution Approach 2:
The access and mobility management function entity acts as an intermediary between the session management function entity and user equipment. It receives reactivation indications from the session management function entity, stores them, and uses them to trigger connection reactivation when user equipment transitions from idle to connected state, ensuring downlink data can be successfully transmitted
2Productivity
If user equipment switches to idle state to save network resources, then network resources are saved, but connection reactivation mechanism is missing causing transmission failure
Solution Approach 1:
The system performs preliminary actions by storing reactivation indications in advance when user equipment enters idle state. The access and mobility management function entity keeps these indications ready so that when downlink data arrives, the connection can be rapidly reactivated without losing the reactivation context, thus maintaining both resource efficiency and transmission reliability
Solution Approach 2:
The system implements a feedback mechanism where the access and mobility management function entity monitors the state of user equipment and the arrival of downlink data. When user equipment transitions from idle to connected state or when downlink data arrives, the system uses the stored reactivation indication to trigger appropriate actions, ensuring reliable data transmission while maintaining resource efficiency
Data Source
AI summary
In a connection reactivation method, a connection of a PDU session established by user equipment on a N3GPP side is reactivated through communications via a 3GPP network. The user equipment accesses both the 3GPP and the N3GPP network and is originally in an idle state on the N3GPP network. An access and mobility management function entity receives a first message from a session management function entity to reactivate the PDU session connection of the user equipment. The access and mobility management function entity sends a second message to the user equipment via the 3GPP access network to instruct the user equipment to reactivate the connection of the PDU session.