Session Bearer Mapping for Wireless Inter-System Handover
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Solution Overview
Problem
Wireless communication devices face challenges in maintaining seamless service as they move across network coverage areas, particularly in transitioning between different wireless communication network systems like 4G and 5G, which affects session bearers and quality of service (QoS) continuity.
Innovation Solution
An electronic apparatus with processing circuitry that identifies and maps source session bearers to target session bearers based on a mapping relationship, using signals and rules to ensure QoS continuity during inter-system changes, whether from 4G to 5G or vice versa, by associating EPS bearers with QoS flows and updating mapping relationships based on received signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a wireless communication device switches from one network to another due to signal degradation, then network coverage is improved, but session bearer continuity and QoS are disrupted
Solution Approach 1:
The patent applies preliminary action by pre-establishing mapping relationships between source and target session bearers before the inter-system change occurs. The mapping relationship is configured in advance based on QoS parameters, allowing the device to quickly map bearers during handover without disruption, thus maintaining session continuity while expanding network coverage.
Solution Approach 2:
The patent uses a mapping relationship as an intermediary element that connects source session bearers from the first network system to target session bearers in the second network system. This mapping relationship acts as a mediator that preserves QoS characteristics during the transition, enabling seamless bearer continuity across different network systems.
2Reliability
If mapping relationships are established between source and target session bearers, then QoS continuity is maintained, but device complexity increases
Solution Approach 1:
The patent applies universality by designing a mapping relationship mechanism that handles multiple QoS parameters (priority, bit rate, packet loss rate, delay) in a unified manner. The same mapping framework can accommodate different QoS requirements across various session bearers, reducing the need for separate management mechanisms for each parameter and thereby limiting the increase in device complexity.
3Measurement precision
If the electronic apparatus stores mapping rules from previous inter-system changes, then mapping accuracy is improved, but memory requirements increase
Solution Approach 1:
The patent extracts only the essential mapping relationships and QoS parameters from previous inter-system changes that are relevant for future mappings. By selectively storing only the necessary mapping rules rather than all possible data, the system achieves high mapping accuracy while limiting the increase in memory requirements through focused extraction of critical information.
Data Source
AI summary
Aspects of the disclosure provide an electronic apparatus and methods for wireless communication. The electronic apparatus can include processing circuitry configured to identify, during an inter-system change of the electronic apparatus from a source network system to a target network system, at least one source session bearer between the electronic apparatus and the source network system. The processing circuitry can further map the at least one identified source session bearer to at least one target session bearer based on a mapping relationship that matches the at least one identified source session bearer with the at least one target session bearer to be established between the electronic apparatus and the target network system.