RRC State Control Unit for Dual Connectivity Resource Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current 3GPP specifications do not provide a clear process for returning from RRC_Inactive to RRC_Connected state in dual connectivity, leading to potential delays in detecting failures and unnecessary resource consumption by secondary nodes.
Innovation Solution
A communication apparatus with an RRC state control unit that transitions from RRC_Inactive to RRC_Connected state and then to RRC_Idle if connection processing with either the master or secondary base station fails, preventing unnecessary resource consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the UE maintains communication with the master node that returned successfully from RRC_Inactive to RRC_Connected, then the connection can be quickly reestablished, but the detection of failure to return for the secondary node is delayed and secondary node resources are consumed unnecessarily
Solution Approach 1:
The UE implements feedback mechanisms by monitoring the RRC connection status with both master node and secondary node independently. When transitioning from RRC_Inactive to RRC_Connected, the UE actively checks whether the connection with each node is successfully reestablished. If the secondary node connection fails, the UE provides feedback information indicating this failure state, which triggers the transition to RRC_Idle state for both nodes, thereby preventing unnecessary resource consumption at the secondary node while maintaining quick reconnection capability through the master node.
2Loss of energy
If the UE transitions to RRC_Idle state upon connection failure with either master or secondary node, then unnecessary resource consumption is suppressed, but the connection recovery process becomes more complex
Solution Approach 1:
The invention segments the dual connectivity management into independent monitoring channels for master node and secondary node. Each node's connection status is tracked separately through distinct RRC message exchanges and status indicators. This segmentation allows the system to identify which specific node connection failed without requiring complex analysis of the overall connection state, simplifying the decision logic for state transitions while effectively suppressing resource consumption by transitioning to RRC_Idle only when necessary.
Data Source
AI summary
A communication apparatus capable of communicating with a master base station and a secondary base station, after it is decided, in a case where a radio resource control (RRC) state of the apparatus is Inactive state, where the apparatus is disconnected in a physical layer and is connected in a logical layer, to cause the RRC state to transit from the Inactive state to Connected state, where the apparatus is connected in the physical layer and the logical layer, executes processing for connecting with the master base station and the secondary base station, and in a case where the processing for connecting with the master base station or the secondary base station fails, causes the RRC state to transit to Idle state, where the apparatus is connected in neither the physical layer nor the logical layer.