D2D Scheduling Assignment Resource Selection for Collision Avoidance
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Solution Overview
Problem
In device-to-device (D2D) wireless communication, scheduling assignment (SA) collisions and inefficient resource allocation occur due to missed assignment signaling, leading to power wastage and reduced transmission efficiency.
Innovation Solution
The method involves selecting SA resources across multiple SA periods to transmit SAs for assigning the same data resources, using reserved SA resources linked to the same data resource pattern, and employing device IDs or indices to determine repeated SAs, thereby increasing transmission opportunities and avoiding collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SA resources are selected in SA pools of more SA periods to transmit SAs for assigning the same data resources, then transmission opportunities increase and collision avoidance improves, but device complexity and resource allocation overhead increase
Solution Approach 1:
The patent divides SA resource selection into multiple SA periods, where SAs are transmitted in selected SA pools across different periods. This segmentation allows the system to spread SA transmissions over time, increasing transmission opportunities while managing complexity through structured periodic selection of SA resources.
Solution Approach 2:
The patent employs pre-configuration of SA resources and patterns before actual data transmission. By pre-defining which SA pools will be used in which periods and establishing resource patterns in advance, the system reduces real-time decision complexity while maintaining reliable transmission opportunities across multiple periods.
2Adaptability or versatility
If D2D-enabled wireless device transmits SAs in each SA period, then resource allocation flexibility improves, but transmission power consumption increases
Solution Approach 1:
The patent implements periodic SA transmission where D2D-enabled devices transmit SAs only in selected SA pools within specific SA periods rather than continuously in every period. This periodic approach maintains resource allocation flexibility through structured selection while significantly reducing power consumption by eliminating transmissions in non-selected periods.
Solution Approach 2:
The system dynamically selects which SA pools will be used for SA transmission in different periods based on traffic conditions and resource availability. This dynamic selection allows the device to adapt resource allocation flexibility to actual needs while conserving power during periods when SA transmission is not required.
3Ease of operation
If SA and data transmissions are based on D2D-enabled wireless device's own selection, then device autonomy improves, but collision probability increases when assignment signaling is missed
Solution Approach 1:
The patent incorporates feedback mechanisms where devices monitor assignment signaling from other devices and adjust their SA resource selection accordingly. When assignment signaling is detected, devices can adapt their transmissions to avoid collisions, maintaining autonomy while improving reliability through responsive adjustment based on network conditions.
Solution Approach 2:
The system takes preliminary anti-action by pre-coordinating SA resource usage across multiple devices through assignment signaling. Before collisions can occur, the network provides information about resource allocations, allowing devices to proactively adjust their transmissions to avoid conflicts while maintaining device autonomy in execution.
Data Source
AI summary
The present disclosure provides a scheduling assignment indicating method and device-to-device (D2D)-enabled wireless device. The method is used by D2D-enabled wireless devices communicating with each other via multiple SA periods, each of which including a SA pool and a data pool, wherein the SA pool is used for transmitting SA for assigning data resource of the data pools, the method comprising: selecting SA resources in SA pools of more SA periods to transmit SA to assign the same data resource for the D2D-enabled wireless device. The SA indicating method and D2D-enabled wireless device according to the present disclosure can increase the capacity of the SA pools, avoid SA and/or data transmission collisions, and increase the robustness of the SA transmission.