Radio Terminal Resource Allocation for D2D ProSe
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Solution Overview
Problem
Current specifications for Device to Device Proximity Service (D2D ProSe) in 3GPP do not effectively utilize UE-to-Network relay, leading to delays and interference in direct communication, particularly when multiple destinations are involved, as existing technologies lack efficient radio resource management and priority handling for high-priority data.
Innovation Solution
The proposed solution involves a radio terminal and base station configuration that allows for simultaneous allocation and management of multiple radio resources, with the base station assigning SL identifiers and control information to the radio terminal, enabling it to transmit data to multiple destinations efficiently by selecting non-overlapping radio resources and prioritizing high-priority data transmission using extended SCI and DCI formats.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single radio resource is allocated for direct communication, then resource management is simple, but transmission delays occur when multiple destinations are involved
Solution Approach 1:
The patent divides the radio resource pool into multiple separate radio resources (first radio resource and second radio resource) that can be independently allocated to different destinations. This segmentation allows simultaneous transmissions without interference while maintaining manageable complexity through structured resource division.
2Loss of time
If radio resources are allocated sequentially to multiple destinations, then resource allocation is simple, but transmission delays increase
Solution Approach 1:
The base station performs preliminary allocation of multiple radio resources before transmission is needed. By pre-configuring the first radio resource for one destination and the second radio resource for another destination, the system eliminates sequential allocation delays while maintaining clear resource management through advance planning.
3Productivity
If all data is transmitted with equal priority, then scheduling is simple, but high-priority data experiences delays
Solution Approach 1:
The patent applies different priority levels to different data transmissions by associating the first radio resource with high-priority data and the second radio resource with normal-priority data. This local quality differentiation allows high-priority data to be transmitted immediately on the first radio resource while normal-priority data uses the second radio resource, eliminating the need for complex dynamic scheduling.
4Productivity
If multiple radio resources are allocated simultaneously, then transmission efficiency improves, but resource coordination becomes complex
Solution Approach 1:
The patent segments the radio resources into distinct, non-overlapping allocations (first radio resource and second radio resource) with clear destination associations. This segmentation enables simultaneous transmissions to multiple destinations without requiring complex coordination mechanisms, as each resource is independently managed and dedicated to specific destinations.
Data Source
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AI summary
A radio terminal according to an embodiment comprises: a receiver configured to receive, from a base station, a plurality of control information including information about a radio resource used in a proximity service; and a controller configured to determine, on a basis of a notification timing of the plurality of control information, whether or not the information about the radio resource included in each of the plurality of control information are simultaneously available.