Logical Channel Scheduling via Dynamic PBR and LCP Indications
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Solution Overview
Problem
The existing process for logical channel configuration in 5G communications is complex and leads to overstocking and increased RRC signaling overheads, affecting the performance of terminal devices, particularly in URLLC services where real-time scheduling requirements are critical.
Innovation Solution
A method and system for dynamically sending logical channel scheduling indication information to terminal devices, allowing for real-time allocation of uplink scheduling resources without the need for conventional RRC reconfiguration, using indications of PBR and LCP sent through control messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the terminal device uses the conventional RRC reconfiguration process to modify logical channel configuration, then the logical channel configuration can be updated, but the process becomes complex and causes overstocking to the buffer while generating large amounts of RRC signaling
Solution Approach 1:
The patent extracts the essential scheduling parameters (PBR and LCP) from the complex RRC reconfiguration process and transmits them separately through concise signaling messages. This allows the terminal device to update logical channel configurations without going through the entire RRC reconfiguration procedure, thereby reducing process complexity and signaling overhead while maintaining configuration update capability
Solution Approach 2:
The patent segments the logical channel configuration update process into two parts: (1) transmitting scheduling parameters through compact signaling messages, and (2) allowing the terminal device to autonomously apply these parameters. This segmentation separates the critical update function from the complex RRC procedure, reducing both signaling overhead and processing complexity
2Productivity
If the terminal device allocates uplink scheduling resources based on static logical channel configuration, then the allocation process is simple, but the configuration cannot satisfy real-time scheduling requirements for services like URLLC
Solution Approach 1:
The patent implements dynamic logical channel scheduling by allowing the network device to update PBR and LCP parameters through signaling messages during runtime. This enables the system to adapt to changing service requirements in real-time, particularly for latency-sensitive services like URLLC, while maintaining efficient resource allocation through the terminal device's autonomous application of received parameters
Solution Approach 2:
The patent establishes preliminary logical channel configurations through RRC setup, then enables rapid updates through subsequent signaling messages. This preliminary configuration provides a baseline for efficient scheduling, while the update mechanism allows real-time adaptation when service requirements change, balancing simplicity with flexibility
3Adaptability or versatility
If the terminal device frequently updates logical channel configuration through RRC reconfiguration, then the configuration can adapt to changing requirements, but RRC signaling overheads increase significantly
Solution Approach 1:
The patent extracts only the essential scheduling parameters (PBR and LCP) from the full RRC reconfiguration message and transmits them through dedicated signaling messages. This extraction approach allows the terminal device to update logical channel configurations with minimal signaling overhead, avoiding the need to transmit the entire RRC configuration structure while maintaining adaptability
Solution Approach 2:
The patent changes the transmission format of scheduling parameters from full RRC configuration messages to compact signaling messages that carry only the essential PBR and LCP parameters. This parameter change reduces the information volume significantly while maintaining the ability to update logical channel configurations adaptively, thereby reducing RRC signaling overhead
Data Source
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AI summary
Embodiments of the present invention relate to the communications field, and provide a logical channel scheduling method and system, and an apparatus, to dynamically send logical channel scheduling indication information to a terminal device, thereby ensuring that a logical channel configuration satisfies a real-time scheduling requirement, and improving transmission performance of the terminal device while reducing RRC signaling overheads required by the logical channel configuration. The logical channel scheduling method includes: receiving, by the terminal device, control information sent by a network device, where the control information includes the logical channel scheduling indication information, and the logical channel scheduling indication information is any one of the following: an indication that a resource is used by a logical channel separately, an update indication of a prioritized bit rate PBR scheduled for the logical channel, and an update indication of a logical channel priority LCP scheduled for the logical channel; and obtaining, by the terminal device according to the logical channel scheduling indication information, an uplink scheduling resource used for sending logical channel data.