Logical Channel Prioritization Scheme Selection
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Solution Overview
Problem
Current wireless communications networks face challenges in efficiently managing diverse data traffic profiles and latency requirements across various devices, particularly in supporting Ultra Reliable Low Latency Communications (URLLC) services, which demand high reliability and low latency.
Innovation Solution
The implementation of a method for selecting data for transmission in wireless communications networks involves using logical channel prioritization schemes to allocate capacity based on received allocation messages, allowing communications devices to prioritize and select data from multiple logical channels according to specific requirements, such as latency and reliability, using the selected schemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single logical channel prioritization scheme is used for all data traffic, then device complexity is reduced and ease of operation is improved, but network performance deteriorates for diverse services like URLLC that require high reliability and low latency
Solution Approach 1:
The patent implements dynamic selection of logical channel prioritization schemes based on service requirements. The network can switch between different LCP schemes (e.g., first scheme for latency-sensitive services, second scheme for throughput-oriented services) depending on the traffic profile and QoS requirements, making the system adaptive rather than static
Solution Approach 2:
Different prioritization schemes are applied to different logical channels or service types locally. Each service type (URLLC, eMBB, mMTC) can have its own optimized LCP scheme tailored to its specific requirements, rather than applying a uniform scheme across all traffic
2Reliability
If multiple logical channel prioritization schemes are implemented to support diverse services, then network performance and service quality are improved, but device complexity increases
Solution Approach 1:
The user equipment autonomously selects the appropriate LCP scheme based on pre-configured parameters and service requirements without requiring complex real-time negotiation. The device maintains multiple schemes but selects among them based on simple criteria, reducing implementation complexity while maintaining performance benefits
3Loss of time
If data transmission prioritizes high-priority logical channels, then latency is reduced for urgent data, but capacity available for lower-priority channels deteriorates
Solution Approach 1:
The patent employs dynamic LCP schemes that can adjust prioritization in real-time based on buffer status, QoS requirements, and network conditions. When URLLC data arrives, the system dynamically switches to a scheme that prioritizes low-latency transmission; when eMBB traffic dominates, it switches to a scheme that optimizes overall throughput
Data Source
AI summary
A method of selecting data for transmission in a wireless communications network by a communications device, the method includes receiving by the communications device an allocation message, the allocation message including an indication of first communications resources for transmitting of data from a first group of one or more of a plurality of logical channels and the allocation message is received in response to a second scheduling request message requesting the first communications resources for transmitting the data from the first group of the one or more logical channels which was transmitted after a first scheduling request message requesting second communications resources for transmitting data from a second group of the one or more of the plurality of logical channels, in response to receiving the allocation message.