Multi-Carrier D2D Resource Allocation via Independent Sensing
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Solution Overview
Problem
In wireless communication systems, device-to-device (D2D) communication faces challenges in securing transmission resources for simultaneous message transmission on multiple carriers due to half-duplex limitations, where resources available for simultaneous transmission are often limited, affecting data transmission rates and network efficiency.
Innovation Solution
A method for a user equipment (UE) to sense transmission resources independently for each carrier, calculate the ratio of available resources, and select transmission resources based on a predetermined threshold ratio, allowing for simultaneous message transmission on multiple carriers by determining optimal transmission times and resource allocation considering congestion levels and message priorities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If transmission resources are allocated on multiple carriers simultaneously, then data transmission rate is improved, but resource availability is reduced due to half-duplex limitations
Solution Approach 1:
The patent segments transmission resources by dividing them into first transmission resources on a first carrier and second transmission resources on a second carrier. This segmentation allows the terminal to independently sense and select resources on each carrier, maximizing the utilization of available resources while adhering to half-duplex constraints.
Solution Approach 2:
The patent introduces a ratio threshold dimension to resource selection. By calculating the ratio of available transmission resources and comparing it against a threshold, the system adds a quantitative decision-making layer that enables optimal resource allocation across multiple carriers, transforming the resource selection problem from qualitative to quantitative analysis.
2Ease of operation
If transmission resources are selected without considering ratio threshold, then resource selection simplicity is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent performs preliminary sensing of transmission resources on each carrier before actual transmission. By independently sensing first and second transmission resources and calculating their ratio in advance, the system prepares optimal resource candidates beforehand, ensuring both efficient utilization and operational simplicity during actual transmission.
Solution Approach 2:
The patent changes the parameter of resource selection by introducing a ratio threshold criterion. Instead of simple random selection, the system calculates the ratio of available resources and uses this parameter to determine whether to proceed with transmission on specific carriers, thereby optimizing resource utilization while maintaining operational clarity.
Data Source
AI summary
According to various embodiments, disclosed are a method by which a terminal simultaneously transmits messages in at least two carriers in a wireless communication system supporting device to device (D2D) communication, and an apparatus therefor. Particularly, disclosed are a method by which a terminal simultaneously transmits messages in at least two carriers, and an apparatus therefor, the method comprising the steps of: independently sensing, by a carrier, a transmission resource, and calculating the ratio of transmission resources, which can be simultaneously transmitted on at least two carriers, on the basis of a result of the sensing by the carrier; setting the sensed transmittable transmission resource as a transmission candidate resource when the calculated transmission resource ratio is greater than or equal to a preset threshold ratio; and selecting a transmission resource to be used for the message transmission in each of at least two carriers within the transmission candidate resource.