D2D Priority Indicator in Scheduling Assignments
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Solution Overview
Problem
Current device-to-device (D2D) communication systems lack a mechanism to prioritize communications effectively, especially in scenarios where network resources are scarce, leading to challenges in managing high-priority data transmissions amidst high traffic conditions.
Innovation Solution
Implementing a priority indicator system that allows UEs to signal and receive priority levels within scheduling assignments (SAs), enabling high-priority data to be sent even when network resources are full, and allowing receivers to prioritize D2D data reception over other operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If D2D communication shares the same spectrum as cellular system with reserved uplink resources, then spectrum efficiency is improved and flexibility is increased, but resource contention and interference increase leading to difficulty in prioritizing high-priority communications
Solution Approach 1:
The patent applies local quality by introducing priority indicators that differentiate the characteristics of specific D2D communication transmissions. Each SA message can carry priority information that locally identifies high-priority communications, allowing receivers to selectively prioritize decoding based on the specific transmission's priority level rather than treating all D2D communications uniformly.
Solution Approach 2:
The patent changes the parameter space of D2D communications by adding priority indicator parameters to SA messages. This allows the system to dynamically adjust the importance level of transmissions, enabling receivers to modify their decoding behavior based on priority parameters. High-priority communications can be identified and processed preferentially through these parameter changes.
2Productivity
If connectionless D2D communication is used to reduce overhead and increase capacity, then communication efficiency is improved, but ability to ensure reliable delivery of high-priority data deteriorates
Solution Approach 1:
The patent applies preliminary action by embedding priority indicators in SA messages before the actual data transmission occurs. This allows receivers to pre-configure their reception behavior based on the priority information received in advance, ensuring that high-priority transmissions are prepared for and can be reliably decoded even in connectionless mode.
Solution Approach 2:
The patent implements feedback through the priority indicator mechanism in SA messages. Receivers can monitor priority indicators and adjust their reception and decoding strategies accordingly, providing a feedback loop that enhances reliability for high-priority communications while maintaining the efficiency of connectionless operation.
3Device complexity
If scheduling assignments are communicated on sparse dedicated resources, then resource allocation is simplified, but ability to support prioritized communications among multiple UEs deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the SA message structure into distinct components, including a priority indicator field. This segmentation allows the priority information to be independently processed and acted upon without complicating the overall SA communication mechanism, maintaining simplicity while adding priority management capability.
Solution Approach 2:
The patent makes the SA message structure universal by designing it to carry both traditional scheduling information and priority indicators in a unified format. This multi-functionality allows the same sparse dedicated resources to support both basic scheduling and priority-based differentiation without requiring separate resource allocations.
4Reliability
If all UEs monitor SAs to decode D2D data, then reception reliability is improved, but energy consumption and processing overhead increase
Solution Approach 1:
The patent applies partial action by enabling UEs to selectively decode only those SA messages that indicate high-priority communications. Instead of all UEs monitoring and decoding all SAs, receivers can use priority indicators to filter and focus their processing effort only on relevant high-priority transmissions, reducing overall energy consumption and processing overhead while maintaining reliability for important data.
Data Source
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AI summary
A method includes determining, by a network device, a priority for communicating data. The method further includes determining a priority indicator based on the determined priority. The method further includes communicating, by the network device, the priority indicator included within a scheduling assignment (SA) to a data transmitter. The method further includes communicating, by the network device, the data. The data has a priority level that exceeds a predetermined priority threshold.