Handover Mechanism Selective Flow Handling
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Solution Overview
Problem
Existing handover mechanisms across heterogeneous wireless communication networks, such as those defined by the IEEE 802.21 standard, face challenges in maintaining seamless mobility and service continuity due to the lack of effective management of multiple data flows during network transitions, often resulting in dropped connections and poor user experience when target points of attachment lack sufficient resources.
Innovation Solution
The method enhances handover processes by including information about ongoing communication flows in signaling messages, allowing for selective treatment of individual data flows, prioritization, and resource management on a per-flow basis, enabling more efficient handover decisions and minimizing dropped connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If handover mechanisms treat all data flows uniformly during network transitions, then the handover process is simple, but critical communications may be dropped and service continuity is compromised
Solution Approach 1:
The patent segments data flows into different categories (e.g., critical vs. non-critical flows) based on their characteristics and requirements. This segmentation allows the handover mechanism to apply different handling strategies to different flow types, ensuring critical communications are preserved while maintaining manageable complexity through structured classification.
Solution Approach 2:
The patent applies local quality by treating different data flows differently based on their specific characteristics and priorities. Instead of uniform treatment, the system assigns different handling qualities to different flows during handover, such as prioritizing real-time communications over bulk data transfers, thereby improving service continuity for critical services.
2Productivity
If handover mechanisms include detailed flow information in signaling messages, then selective flow handling and resource allocation improve, but signaling overhead increases
Solution Approach 1:
The patent extracts only the essential flow information needed for handover decisions from the complete data flow descriptions. By selecting and transmitting only critical parameters (such as flow priority, type, and resource requirements) rather than all possible flow details, the system achieves effective selective handling while minimizing signaling overhead.
Solution Approach 2:
The patent applies partial action by including only the necessary flow information in signaling messages rather than all possible details. This selective inclusion provides sufficient information for effective handover decisions and resource allocation while avoiding the excessive signaling overhead that would result from transmitting complete flow descriptions.
3Reliability
If target points of attachment lack sufficient resources, then handover should be blocked to prevent resource exhaustion, but this causes dropped connections and poor user experience
Solution Approach 1:
The patent introduces dynamic resource allocation during handover by continuously monitoring available resources at target points of attachment and adjusting flow allocation in real-time. This dynamic approach allows the system to adapt to varying resource conditions, preventing resource exhaustion while maintaining connection stability and improving user experience through flexible resource management.
Solution Approach 2:
The patent applies preliminary action by assessing resource availability at target points of attachment before completing the handover process. By evaluating resource conditions in advance and using this information to make informed handover decisions, the system prevents resource exhaustion and connection drops while ensuring smooth transitions and good user experience.
Data Source
AI summary
A method for supporting handover mechanisms, in particular Media Independent Handover (MIH) mechanism according to the IEEE 802.21 standard, wherein a user equipment (UE) attaches to an access network (AN) via points of attachment (PoAs), wherein signalling messages are exchanged between the entities participating in the handover process, in particular between the user equipment and the points of attachment, and wherein the handover mechanism supports changing the network connection of the user equipment from one of the points of attachment—current point of attachment (PoA)—to another one of the points of attachment—target point of attachment—while maintaining all ongoing communication of the user equipment, is characterized in that information about the user equipment's ongoing communication is added to the signalling messages exchanged in the handover process, wherein the information is employed to treat individual traffic flows of the user equipment's ongoing communication selectively during the handover process.