MCG Failure Reporting via Split SRB in MR-DC
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Solution Overview
Problem
In wireless communication systems with Multi-Radio Access technology Dual Connectivity (MR-DC), Master Cell Group (MCG) failures lead to service interruptions due to the need for RRC re-establishment procedures, which can be prolonged and disruptive, especially when a Secondary Cell Group (SCG) maintains a good link condition.
Innovation Solution
A method for reporting MCG failures using split SRB and/or SRB3, allowing for MCG reconfiguration without suspending all resource blocks, thereby reducing service interruptions by enabling continued communication through available secondary cell groups during reconfiguration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RRC re-establishment procedure is performed when MCG failure is detected, then reliability is improved, but service interruption increases
Solution Approach 1:
The patent segments the service interruption by separating MCG and SCG operations. When MCG failure is detected, the UE suspends only MCG transmissions while maintaining SCG operations. This segmentation allows the re-establishment procedure to be performed for MCG without affecting SCG service, thus reducing overall service interruption time while maintaining reliability through proper failure reporting and reconfiguration.
2Reliability
If all resource blocks are suspended for MCG reconfiguration, then reconfiguration reliability is improved, but productivity decreases
Solution Approach 1:
The patent applies segmentation by dividing resource blocks into MCG and SCG sets. During MCG reconfiguration, only MCG resource blocks are suspended while SCG resource blocks continue to operate. This selective suspension maintains reconfiguration reliability for the failed MCG while preserving data transmission productivity through continued SCG operations.
Solution Approach 2:
The patent ensures continuity of useful action by maintaining SCG data transmission during MCG reconfiguration. The UE continues to utilize SCG resource blocks for data communication while the MCG undergoes reconfiguration, thus avoiding complete service interruption and maintaining productivity during the reconfiguration process.
3Loss of time
If split SRB and SRB3 are used for failure reporting, then service interruption is reduced, but device complexity increases
Solution Approach 1:
The patent applies universality by configuring split SRB and SRB3 to serve multiple functions: normal data transmission, failure detection, failure reporting, and reconfiguration signaling. This multi-functionality reduces the need for separate dedicated channels for each function, thereby reducing service interruption during failure procedures while managing device complexity through efficient resource utilization.
Data Source
AI summary
A method and apparatus for reporting a master cell group (MCG) failure and/or a Primary Cell (PCell) failure when the MCG failure and/or the PCell failure is detected by a wireless communication device is disclosed. In one embodiment, a method for reporting a Master Cell Group (MCG) failure by a wireless communication device, includes: detecting a first MCG failure; and reporting the first MCG failure to a first wireless communication node, according to at least one of the following: a first indicator, a first failure type of the first MCG failure, a status of a Secondary Cell Group (SCG), and a Signal Radio Bearer (SRB) configuration.