QoS Profile Mapping for Seamless Wireless Handover
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Solution Overview
Problem
In wireless communication networks, handover events between outdoor and indoor systems often lead to service interruptions due to inadequate Quality of Service (QoS) profile updates, resulting in bearer modifications and 'ping pong' effects that disrupt data traffic.
Innovation Solution
A method where a first QoS profile is maintained for a bearer when a wireless device moves from an indoor to an outdoor system by configuring the target outdoor base station to support the indoor QoS profile, avoiding bearer modifications and ensuring continuous service by mapping the indoor QoS profile to an appropriate level in the outdoor system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If bearer modification is triggered during handover to update QoS profile, then QoS level can be optimized for indoor system, but data traffic will be interrupted and service reliability deteriorates
Solution Approach 1:
The target e-Node-B performs preliminary admission assessment before handover execution, pre-configuring the QoS profile mapping in advance. This preliminary action ensures that when handover occurs, the QoS profile can be immediately applied without requiring post-handover modification, thus avoiding service interruption while maintaining QoS optimization capability.
Solution Approach 2:
The patent introduces a QoS profile mapping mechanism as an intermediary between the indoor and outdoor QoS systems. The mapping table acts as a mediator that translates indoor QoS profiles into outdoor QoS profiles, enabling seamless QoS transition during handover without direct modification of active bearers, thereby maintaining service continuity.
2Speed
If default QCI is applied during handover to macro system, then handover can be completed quickly, but user service quality deteriorates due to inadequate QoS level
Solution Approach 1:
The target e-Node-B performs preliminary admission assessment and QoS profile mapping configuration before handover execution. This pre-preparation ensures that the appropriate QoS profile is already in place, eliminating the need to fall back to default QCI after handover, thus maintaining both speed and service quality.
Solution Approach 2:
The patent dynamically adjusts QoS parameters by mapping indoor QoS profiles to outdoor QoS profiles based on the handover context. Instead of using a fixed default QCI, the system changes the QoS parameters adaptively according to the target system's capabilities and the user's service requirements, ensuring adequate service quality while maintaining efficient handover.
3Adaptability or versatility
If bearer modification is triggered after location event reporting, then QoS can be updated to match current location, but data traffic interruption and ping pong effect occur
Solution Approach 1:
The target e-Node-B performs preliminary admission assessment and QoS profile configuration before handover execution. This preliminary action ensures that the QoS profile is ready in advance, eliminating the need for post-handover bearer modification triggered by location events, thus avoiding traffic interruption while maintaining location-based QoS differentiation.
Solution Approach 2:
The patent maintains continuous QoS profile application during handover by pre-configuring the target system with the appropriate QoS parameters. This continuity approach ensures that the useful action of data transmission continues without interruption, as the QoS profile is already in place and does not require post-handover updates triggered by location events.
4Reliability
If handover is rejected when target base station cannot support enhanced QoS profile, then service quality is maintained, but user mobility and system flexibility are reduced
Solution Approach 1:
The patent dynamically adjusts QoS parameters by mapping indoor QoS profiles to outdoor QoS profiles based on the handover context. Instead of rejecting handover when the target system cannot support the exact same QoS profile, the system changes the QoS parameters adaptively to match the target system's capabilities while maintaining equivalent service quality, thus preserving both reliability and flexibility.
Solution Approach 2:
The QoS profile mapping mechanism acts as an intermediary that bridges the gap between indoor and outdoor QoS systems. When the target base station cannot support the exact enhanced QoS profile, the mapping table provides an intermediate solution by translating the QoS requirements into compatible parameters, enabling handover while maintaining service quality and system flexibility.
Data Source
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AI summary
A method for configuring a QoS for a wireless communication network bearer corresponding to a wireless device is provided. The method includes assigning a first QoS profile to the bearer when the wireless device is in a first QoS region served by a first wireless communication network cell, the first QoS profile corresponding to a first QoS available in the first wireless communication network cell but not available to the wireless device in a second wireless communication network cell neighboring the first wireless communication network cell. The method further includes establishing communication for the bearer between the wireless device and the second wireless communication network cell when the wireless device begins a handover process with the second wireless communication network cell, the communication for the bearer being established using the first QoS profile but corresponding to a second QoS level different from the first QoS level.