D2D Resource Sensing via DMRS Power for Collision Avoidance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, especially in multi-node cooperative communication schemes, efficient resource configuration for device-to-device (D2D) communication is challenging due to the complexity of managing multiple nodes and ensuring optimal signal transmission without interference, particularly in scenarios like V2X communication where resource allocation is critical for reducing collisions and maintaining network stability.
Innovation Solution
A method for resource sensing and selection in D2D communication, where user equipment (UE) performs resource sensing based on received energy or demodulation reference signal (DMRS) reception power to identify unoccupied resources, allowing for efficient allocation and minimizing interference, and potentially using different DMRS sequences to differentiate signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If resource allocation is performed in multi-node cooperative communication, then data throughput is improved, but resource collision and interference increase
Solution Approach 1:
The patent applies preliminary action by performing resource sensing and selection before actual D2D communication. The transmitting UE senses the channel state and selects appropriate resources in advance, which prevents resource collisions and interference before they occur, thereby maintaining both high throughput and reliability
2Productivity
If distributed nodes are used for communication, then transmission capacity and power efficiency are enhanced, but resource management complexity increases
Solution Approach 1:
The patent applies self-service by enabling UEs to autonomously perform resource sensing, selection, and allocation without centralized control. Each UE independently senses the channel and selects resources based on local conditions, which simplifies resource management in distributed multi-node systems while maintaining high transmission capacity
3Object-affected harmful factors
If resource sensing is performed to identify unoccupied resources, then interference is minimized, but time and energy consumption increase
Solution Approach 1:
The patent applies partial action by performing resource sensing only on specific resources that are likely to be used for D2D communication, rather than sensing all available resources. This selective sensing approach reduces the time and energy required while still effectively identifying unoccupied resources and minimizing interference
Data Source
Figure 1(a)~1(b)
Figure 2
Figure 3
AI summary
The present invention provides a method for transmitting a signal between terminals, and an apparatus for the same. Specifically, a first terminal performs resource sensing within a resource search section including a plurality of resource units. The first terminal selects a specific resource unit for transmitting the signal on the basis of the result of the resource sensing, and transmits the signal via the specific resource unit by means of a first reference signal sequence. The specific resource unit is a resource occupied by a second terminal, and the first reference signal sequence may be determined on the basis of a second reference signal sequence of the second terminal.