Path Switch Method for Dual Connectivity in Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently performing path switches during dual connectivity, leading to potential service degradation due to inadequate handling of bearer types and quality of service parameters.
Innovation Solution
A method is introduced to determine and manage path switches by receiving bearer setup information, including bearer types, and transmitting path switch requests to a second network entity, prioritizing default bearers for admission control, and maintaining services if default bearers are not admitted, thereby preventing service degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If path switch is performed during dual connectivity without prioritizing default bearers, then path switching speed is improved, but service reliability deteriorates due to potential default bearer release
Solution Approach 1:
The patent applies preliminary action by performing admission control for default bearers before completing the path switch procedure. The source eNB includes default bearer information in the path switch request to the target eNB, and the target eNB performs admission control evaluation before finalizing the path switch. This ensures default bearers are secured in advance, preventing service degradation while maintaining switching efficiency.
2Device complexity
If admission control is performed for all bearers equally, then processing simplicity is improved, but service quality deteriorates due to inadequate prioritization of default bearers
Solution Approach 1:
The patent applies local quality by implementing differentiated admission control for different bearer types. The system identifies default bearers specifically in the path switch request and applies prioritized admission control evaluation to these bearers, while other bearers follow standard procedures. This localized differentiation ensures critical default bearers receive appropriate attention without significantly increasing overall processing complexity.
3Quantity of substance
If path switch request is transmitted without including default bearer information, then signaling overhead is reduced, but detection accuracy deteriorates due to inability to quickly identify handover failures
Solution Approach 1:
The patent applies preliminary action by including default bearer information in the path switch request message transmitted from source eNB to target eNB. This allows the target eNB to perform admission control evaluation specifically for default bearers and quickly identify whether path switch failure is due to default bearer rejection. The additional information enables precise failure detection without excessive signaling overhead.
Data Source
AI summary
The present invention relates to a method and an apparatus for determining a path switch in a wireless communication system. Specifically, the present invention relates to a method for determining a path switch of a first network entity, the method comprising the steps of: receiving bearer setup information including a bearer type regarding at least one bearer; transmitting a path switch request to a second network entity on the basis of the bearer setup information; receiving a path switch response corresponding to the path switch request from the second network entity; and determining a path switch depending on whether the path switch response indicates admission of a default bearer.