Scheduling Assignment Resource Pool Design for D2D Collision Reduction
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Solution Overview
Problem
Current device-to-device (D2D) communication systems face challenges in efficiently managing transmission scheduling, particularly in resource allocation and pattern design, which affects the number of available transmission patterns and collision probability, limiting the scalability and efficiency of D2D communications.
Innovation Solution
The proposed solution involves configuring a scheduling assignment resource pool with Nt subframes and Nf logical parallel resources, using a two-stage mapping mechanism to allocate scheduling assignment resources, ensuring efficient use of physical resource blocks and minimizing collision probability by adapting to different system bandwidths and traffic loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional scheduling assignment patterns are used in D2D communication, then resource allocation is simplified, but the number of available transmission patterns is limited and collision probability increases
Solution Approach 1:
The scheduling assignment resource pool is segmented into multiple subframes (Nt) and logical parallel resources (Nf), creating a two-dimensional resource structure. This segmentation allows for a larger total number of transmission patterns by dividing the resource space into manageable subframes and parallel resource units, thereby increasing pattern diversity without overwhelming complexity.
Solution Approach 2:
The patent introduces a two-stage mapping mechanism that operates in two distinct dimensions: first mapping scheduling assignment resources to subframes, then mapping to physical resource blocks within those subframes. This dimensional approach exponentially increases the number of available transmission patterns by utilizing both time (subframes) and frequency (parallel resources) dimensions simultaneously.
2Reliability
If more transmission patterns are allocated to increase D2D communication capacity, then collision probability decreases, but resource allocation complexity increases
Solution Approach 1:
By segmenting the resource pool into subframes and parallel resources, the patent distributes transmission patterns across multiple segments rather than using a single large pool. This segmentation reduces collision probability by spreading transmissions across different time and frequency resources, while the modular structure keeps allocation complexity manageable through standardized mapping procedures.
Solution Approach 2:
The patent employs configurable parameters (Nt for subframes, Nf for parallel resources) that can be adjusted to optimize the balance between collision probability and allocation complexity. By changing these parameters, the system can adapt to different traffic loads and collision scenarios without fundamentally altering the resource allocation mechanism, maintaining simplicity while improving reliability.
3Adaptability or versatility
If scheduling assignment resources are allocated to support more user devices, then D2D communication scalability improves, but resource pool management becomes more complex
Solution Approach 1:
The scheduling assignment resource pool is designed as a universal structure that can serve multiple user devices simultaneously through the two-stage mapping mechanism. The same resource pool configuration (Nt subframes, Nf parallel resources) can accommodate varying numbers of devices by adjusting the mapping parameters, providing scalability without requiring separate resource pools for different device counts, thus simplifying management.
Solution Approach 2:
The patent implements dynamic resource allocation where the mapping from scheduling assignment resources to physical resources can be flexibly adjusted based on current system conditions and device requirements. This dynamic capability allows the resource pool to adapt to changing scalability needs while maintaining a consistent management framework, avoiding the complexity of static rigid allocation structures.
Data Source
AI summary
Systems and techniques for resource allocation for scheduling assignment. A scheduling assignment is transmitted and/or received using resources that are divided into first and second scheduling assignment resources. A dual resource mapping in accordance with an scheduling assignment index is performed to define first and second resources for transmission and/or reception of the scheduling assignment.