Priority-optimized Sidelink Data Transfer in LTE Prose
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Solution Overview
Problem
Current sidelink data transmission in LTE systems faces inefficiencies due to the allocation of radio resources, where high-priority data is congested with lower-priority data, leading to potential starvation of lower-priority messages and interference in resource allocation.
Innovation Solution
The user terminal autonomously selects radio resources based on priority, matching sidelink logical channel priorities with available radio resource pools to ensure that only priority-matched data is transmitted, thereby reserving high-priority resources for high-priority data and using timers or ratios to manage lower-priority data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If autonomous resource allocation is used for sidelink data transmission, then resource selection flexibility is improved, but resource allocation efficiency deteriorates due to priority mismatch between high-priority and low-priority data
Solution Approach 1:
The resource pool is segmented into multiple priority-specific resource pools (first resource pool for high-priority data, second resource pool for low-priority data). This segmentation allows the system to maintain autonomous resource allocation flexibility while improving efficiency by preventing high-priority data from being congested with low-priority data, thus resolving the contradiction between adaptability and productivity.
2Ease of operation
If all sidelink logical channels are served in one transmission, then transmission simplicity is improved, but data priority handling deteriorates leading to starvation of low-priority messages
Solution Approach 1:
The transmission process is segmented into separate transmissions for different priority levels. High-priority logical channels are served in one transmission using resources from the first resource pool, while low-priority logical channels are served in another transmission using resources from the second resource pool. This segmentation ensures that high-priority data is not starved by low-priority data while maintaining clear operational procedures for each priority level.
Solution Approach 2:
The system dynamically selects which resource pool to use based on the priority of the data that needs to be transmitted. When high-priority data is available, the first resource pool is selected; when only low-priority data is available, the second resource pool is selected. This dynamic adaptation ensures reliable priority-based handling while keeping the transmission process straightforward.
3Quantity of substance
If high-priority resources are shared with low-priority data, then resource utilization is improved, but high-priority data transmission reliability deteriorates due to congestion
Solution Approach 1:
The resource pools are segmented by priority level, with the first resource pool dedicated to high-priority data and the second resource pool dedicated to low-priority data. This segmentation ensures that high-priority data transmission reliability is maintained by preventing congestion from low-priority data, while overall resource utilization remains efficient as each priority level has dedicated resources to use.
Data Source
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AI summary
The invention relates to an improved sidelink data transfer procedure in the context of user equipment autonomous resource allocation, where the transmitting user terminal selects a sidelink destination, logical channels associated to the destination, and a suitable radio resource pool. Furthermore, the terminal determines the amount of sidelink data to transmit, among the sidelink data that is available for transmission from those sidelink logical channels that are associated with the selected sidelink destination and that have a priority that is among the priorities associated with the selected radio resource pool. Then, suitable transmission parameters for performing the sidelink data transmission are determined, and then the actual transmission is performed based on these transmission parameters.