Access Network Re-Selection with Proactive Context Establishment
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Solution Overview
Problem
Current handover procedures in access networks, such as those in 3GPP and IEEE 802.21, do not consider proactive steps on the target access network before a handover trigger, leading to increased execution time and potential service interruptions due to the lack of preparation.
Innovation Solution
A system and method for managing access network re-selection that includes providing a first indication for target network selection and a second indication for establishing a volatile-shallow context on the target access network, allowing proactive procedures to be executed before the handover trigger, reducing the time required for handover execution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If handover procedures are executed after the handover trigger without proactive preparation, then the system maintains simplicity in procedure execution, but the handover duration increases and service interruptions occur
Solution Approach 1:
The patent applies preliminary action by executing handover preparation procedures on the target access network before the handover trigger occurs. The network entity proactively performs context establishment, resource allocation, and other preparatory steps in advance, so that when the handover is triggered, the mobile device can quickly complete the handover with minimal service interruption.
2Productivity
If proactive procedures are executed on the target access network before handover trigger, then handover execution time is reduced, but the system complexity increases due to additional preparation steps
Solution Approach 1:
The patent introduces a network entity as an intermediary that manages the proactive handover preparation procedures. This network entity coordinates the preparation activities on the target access network, reducing the burden on the mobile device and core network elements. The intermediary handles the complexity of proactive procedures while enabling faster handover execution.
3Reliability
If all handover procedures are executed after the handover trigger, then the system maintains simplicity in control flow, but service continuity is compromised due to connection loss
Solution Approach 1:
The patent executes critical handover procedures in advance before the handover trigger and before the mobile device loses connection to the source access network. The network entity proactively establishes contexts, allocates resources, and prepares the target access network, ensuring that when handover is triggered, the mobile device can seamlessly switch networks without service interruption.
Solution Approach 2:
The patent prepares the target access network in advance with all necessary contexts and resources before the handover occurs. This cushioning preparation ensures that no service interruption occurs during the actual handover, as the target network is already ready to immediately accept and serve the mobile device upon connection switch.
Data Source
AI summary
A system and method is provided for managing an access network re-selection. The system includes computing hardware configured to provide a first indication indicating a target access network to be re-selected in case of a handover event and a second indication for establishing a certain context on a target access network. Further, computing hardware may be configured to establish the certain context on the target access network dependent on the provided second indication, said established context including a first part of the access network re-selection. And computing hardware may be configured to execute a second part of the access network re-selection due to the provided first indication and a received trigger for the handover event.