Signalling Radio Bearer Configuration Handling in NR Systems
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Solution Overview
Problem
Current wireless communication systems, particularly in the new radio (NR) system, face challenges in efficiently handling signalling radio bearer configurations due to complexities in radio resource control and packet data convergence protocol entities, leading to suboptimal performance in data rate, latency, and system capacity.
Innovation Solution
The implementation of methods and communication devices that manage signalling radio bearer configurations by processing RRC connection reconfiguration messages, releasing or re-establishing PDCP entities, and configuring new radio bearer settings, allowing for flexible and efficient SRB management across different network architectures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If complex radio resource control and packet data convergence protocol entities are used in NR system, then system functionality and coverage are improved, but handling efficiency of signalling radio bearer configuration deteriorates
Solution Approach 1:
The patent segments the SRB configuration handling into distinct phases: receiving RRC reconfiguration messages, determining PDCP entity operations (release or re-establishment), and applying configurations selectively. This segmentation allows the system to manage complex functionality through modular, manageable steps rather than monolithic processing.
Solution Approach 2:
The patent implements preliminary action by pre-defining PDCP entity operations based on configuration parameters before actual data transmission begins. The system determines whether to release or re-establish PDCP entities in advance, preparing the communication path proactively to avoid delays during actual signalling operations.
2Stability of the object's composition
If traditional SRB configuration methods are used, then system stability is maintained, but data rate and latency performance deteriorate
Solution Approach 1:
The patent introduces dynamics into SRB configuration by enabling flexible release and re-establishment of PDCP entities based on real-time network conditions and configuration messages. Rather than static configuration, the system dynamically adapts PDCP entity states (released or re-established) according to RRC reconfiguration messages, allowing optimized data rates and reduced latency while maintaining stability through controlled transitions.
3Reliability
If PDCP entities are maintained during reconfiguration, then connection continuity is preserved, but system capacity and resource efficiency deteriorate
Solution Approach 1:
The patent applies discarding and recovering by selectively releasing PDCP entities when no longer needed, then re-establishing them when required for optimal performance. This approach allows the system to discard redundant or suboptimal PDCP instances to free resources, while recovering necessary PDCP entities to maintain connection continuity, thereby balancing resource efficiency with reliable communication.
Data Source
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AI summary
A communication device for handling a signalling radio bearer (SRB) configuration comprises instructions of: communicating with a first base station (BS) according to a first SRB configuration, wherein the first SRB configuration configures a first SRB; configuring a first packet data convergence protocol (PDCP) entity associated to the first SRB according to a first PDCP; receiving a first radio resource control (RRC) connection reconfiguration message on the first SRB according to the first PDCP from the first BS or a second BS; releasing the first PDCP entity associated to the first SRB and configuring a second PDCP entity to apply a second PDCP according to a second SRB configuration, when the first RRC connection reconfiguration message comprises the second SRB configuration; and transmitting a first RRC connection reconfiguration complete message according to the second PDCP entity on the first SRB to a third BS.