CSFB UE Fast Return via Integrated RRC Release
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing circuit switched fallback (CSFB) user equipment experience significant delays in returning to the LTE network due to complex and time-consuming service release processes, affecting user experience.
Innovation Solution
A fast return method and system that involves sending an RRC connection release message to the user equipment to trigger the release of both circuit switched and packet switched services, simplifying the release process and reducing the time needed for CSFB user equipment to return to the LTE network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE completes CS service release, PS service release, and RRC connection release processes separately according to the prior art method, then the service release is thorough and complete, but the entire release process is complex and takes a long time
Solution Approach 1:
The patent merges the CS service release, PS service release, and RRC connection release into a single integrated release process. When the MSC determines that both CS and PS services need to be released, it sends a single Iu release command that triggers the UE to release all services simultaneously, eliminating the need for separate release procedures and reducing overall release time.
Solution Approach 2:
The MSC performs preliminary assessment of service states before initiating release. By determining in advance whether both CS and PS services are active and need release, the MSC can prepare and send a single comprehensive Iu release command, avoiding multiple sequential release operations and reducing the total time required for service release.
2Reliability
If the UE follows the multi-step release process in the prior art, then all services are properly released, but the process complexity increases and user experience deteriorates
Solution Approach 1:
The patent combines multiple release procedures into one unified process. Instead of executing separate CS release, PS release, and RRC connection release steps, the system uses a single Iu release command from the MSC that encompasses all release operations, significantly simplifying the overall process while maintaining thorough service release.
3Reliability
If the system uses separate release procedures for CS and PS services, then each service is released independently and reliably, but the total release time becomes extremely long
Solution Approach 1:
The patent merges sequential release operations into a parallel integrated process. By combining CS service release, PS service release, and RRC connection release into a single coordinated operation triggered by one Iu release command, the system achieves both reliable service release and significantly improved return speed to the LTE network.
Data Source
AI summary
A fast return method for CSFB user equipment, includes: receiving a trigger message sent by a mobile switching center MSC, where the trigger message is used to trigger release of a circuit switched CS service of CSFB user equipment UE, and the UE runs both the CS service and a packet switched PS service; and sending a radio resource control RRC connection release message to the UE according to the trigger message, so as to trigger the UE to release a radio bearer of the CS service, a radio bearer of the PS service, and an RRC connection according to the RRC connection release message and fast return to a Long Term Evolution LTE network. According to embodiments of the present invention, a delay for the CSFB user equipment to return to the LTE network can be reduced, thereby improving user experience.