Logical Channel Resource Scheduling for 5G NR Data Duplication
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Solution Overview
Problem
Existing LTE logical channel resource scheduling modes do not effectively distinguish and manage carriers for duplicated data transmission in 5G NR systems, leading to inefficiencies in data transmission reliability.
Innovation Solution
A method and apparatus for selecting one logical channel from two mapped to the same PDCP entity for uplink grant resource scheduling, based on scheduling times and priorities, to optimize resource allocation and ensure reliable data transmission, while maintaining variables to track scheduling times and employing existing LTE MAC protocol parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If LTE logical channel resource scheduling mode is directly used for data duplication, then device complexity is reduced, but data transmission reliability deteriorates because carriers for logical channels are not distinguished
Solution Approach 1:
The patent segments the logical channel scheduling process by introducing separate tracking variables (e.g., scnt-LCID) for each logical channel mapped to the same PDCP entity. This allows independent monitoring and selection between duplicate logical channels, ensuring that transmissions are properly distributed across different carriers while maintaining the overall LTE scheduling framework.
Solution Approach 2:
The patent introduces dynamic selection mechanisms where the MAC entity dynamically chooses which logical channel to schedule based on real-time conditions such as scheduling time counts and carrier availability. This dynamic approach ensures that duplicated data is transmitted over different carriers while adapting to changing network conditions.
2Device complexity
If logical channels are scheduled without tracking scheduling times, then scheduling process is simplified, but resource allocation efficiency deteriorates
Solution Approach 1:
The patent implements feedback mechanisms by maintaining scheduling time count variables (scnt-LCID) for each logical channel. These variables provide feedback on how many times each logical channel has been scheduled, enabling the scheduler to make informed decisions about resource allocation and ensure balanced utilization of duplicate logical channels across different carriers.
3Device complexity
If all logical channels are scheduled equally, then scheduling rules are simplified, but data transmission reliability deteriorates due to lack of priority differentiation
Solution Approach 1:
The patent applies local quality differentiation by introducing priority-based scheduling rules that treat different logical channels differently based on their specific requirements. High-priority logical channels receive preferential scheduling treatment, ensuring that critical data transmissions are reliably delivered while maintaining overall system efficiency.
Data Source
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AI summary
The present invention provides a resource scheduling method and apparatus for a logical channel. The method includes: after an uplink grant resource are obtained, selecting a logical channel from two logical channels mapped to a same PDCP (packet data convergence protocol) entity to participate in uplink grant resource scheduling for a present transmission, where the two logical channels carry an original PDCP PDU (protocol data unit) and a duplicate PDCP PDU, respectively. The present invention is applicable to logical channel resource scheduling for data duplication in a 5G NR system.