MUSIM Device Fast Return To Dual Connectivity
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Solution Overview
Problem
User equipment (UE) faces challenges in maintaining dual connectivity when switching between networks, particularly due to the inability to support secondary cell groups in a deactivated state, leading to excessive configuration and resource management issues.
Innovation Solution
The UE transmits an indication of its capability to delay conditional primary secondary cell addition, requesting a fast return to dual connectivity by releasing secondary cell groups and receiving a radio resource control reconfiguration that allows evaluation of conditional primary secondary cell addition conditions only after the release of resources from the second network, enabling efficient resumption of dual connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE maintains dual connectivity by keeping secondary cell groups active, then connectivity reliability is improved, but device complexity and resource management burden increase
Solution Approach 1:
The patent segments the cell group management into primary cell group (PCG) and secondary cell group (SCG), allowing independent control of each. The UE can release SCG configuration while maintaining PCG, reducing overall configuration complexity while preserving essential connectivity through the primary group.
Solution Approach 2:
The patent implements preliminary action by evaluating conditional PSCell addition conditions in advance and preparing configuration parameters before actual dual connectivity resumption is needed. This allows the UE to quickly restore dual connectivity by simply activating pre-prepared configurations rather than performing complex setup procedures at the moment of switching.
2Device complexity
If the UE releases secondary cell groups to reduce configuration complexity, then device complexity is reduced, but return time to dual connectivity increases
Solution Approach 1:
The patent applies preliminary action by having the UE evaluate conditional PSCell addition conditions and prepare configuration parameters in advance, before actual dual connectivity resumption is needed. This pre-computation and pre-preparation of configuration data enables rapid restoration of dual connectivity without complex real-time setup procedures.
Solution Approach 2:
The patent implements dynamic configuration management where the UE can flexibly switch between maintaining and releasing secondary cell group configurations based on current operational needs. The conditional PSCell addition mechanism allows dynamic evaluation of whether to restore dual connectivity based on real-time conditions, optimizing the balance between complexity and speed.
3Speed
If the UE evaluates conditional primary secondary cell addition conditions immediately, then connectivity restoration speed is improved, but resource management complexity increases
Solution Approach 1:
The patent applies preliminary action by having the UE evaluate conditional PSCell addition conditions and prepare configuration parameters in advance, before actual dual connectivity resumption is needed. This pre-computation and pre-preparation of configuration data enables rapid restoration of dual connectivity without complex real-time setup procedures.
Solution Approach 2:
The UE autonomously evaluates conditional PSCell addition conditions and manages its own configuration parameters without requiring continuous network intervention. The self-service mechanism allows the UE to independently determine when to restore dual connectivity based on pre-configured conditions, reducing the need for complex network-side resource management.
Data Source
AI summary
An apparatus comprising circuitry configured to: transmit, from a first user equipment connected to a first network, an indication of a capability to delay execution of conditional primary secondary cell addition; transmit, from the first user equipment, assistance information to a network node in the first network, wherein the assistance information comprises at least one of a request for release of a secondary cell group or a fast return indication; and receive, from the first network, a radio resource control reconfiguration, wherein the radio resource control reconfiguration indicates at least one of the release of the secondary cell group, a conditional primary secondary cell addition configuration, an indication that a conditional primary secondary cell addition condition is to be evaluated after a second user equipment releases a radio resource control connection with a second network, or an indication to transmit a removal of restriction message.