RRC Full Configuration Handling for Uninterrupted Data Radio Bearer
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Solution Overview
Problem
Communication between user equipment (UE) and a network may be interrupted due to unknown operations performed in response to a full configuration indication.
Innovation Solution
A communication device establishes a packet data unit (PDU) session with a network, configures a data radio bearer (DRB) associated with the PDU session, and releases specific protocol entities when receiving a radio resource control (RRC) message indicating a full configuration, allowing for the addition of a new DRB and continued data communication without interruption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE receives a full configuration indication from the network, then the network can reconfigure radio bearers for optimized data transmission, but the communication between UE and network may be interrupted due to unknown operations
Solution Approach 1:
The patent applies preliminary action by establishing the PDU session and DRB configuration before the full configuration indication is received. The UE maintains the existing DRB configuration and continues data transmission on the first DRB while processing the reconfiguration request, ensuring communication continuity is preserved before any changes are made
Solution Approach 2:
The patent uses an intermediary approach by introducing a transitional state where the UE maintains both the old DRB configuration and processes the new configuration in parallel. The RRC message serves as an intermediary that triggers reconfiguration while the UE preserves the existing communication path until the new configuration is fully established
2Adaptability or versatility
If the UE releases protocol entities associated with the first DRB upon receiving full configuration indication, then the network can add a new DRB with updated configuration, but data communication may be interrupted during the transition
Solution Approach 1:
The patent applies continuity of useful action by maintaining data transmission on the first DRB throughout the reconfiguration process. The UE continues to communicate data on the existing DRB while processing the full configuration indication, ensuring that the useful action of data transmission remains continuous without interruption or time loss
Solution Approach 2:
The patent uses preliminary action by pre-establishing the PDU session and maintaining the existing DRB configuration before the full reconfiguration is complete. This ensures that a communication path is already in place and can continue to carry data while the new configuration is being processed
Data Source
AI summary
A communication device releasing a first service data adaptation protocol entity associated to a first data radio bearer (DRB) identified by a first DRB ID and associated to a packet data unit (PDU) session identified by a PDU session identity (ID) and releasing at least one of a first packet data convergence protocol entity associated to the first DRB, a first radio link control entity associated to the first DRB and a first logical channel associated to the first DRB, when a RRC message indicates a full configuration and comprises a first DRB configuration, wherein the first DRB configuration comprises a second DRB ID and the PDU session ID; adding a second DRB according to the first DRB configuration and associating the second DRB to the PDU session; and communicating first data on the second DRB.