Orthogonal Resource Patterns for D2D Signal Transmission
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Solution Overview
Problem
Current wireless communication systems, such as LTE, face challenges in efficiently transmitting device-to-device (D2D) signals due to interference and resource allocation issues, particularly in overlapping resource units, which affect system performance and interference management.
Innovation Solution
The method involves setting and using overlapping orthogonal resource patterns, defined by axis-priority mapping, to configure and transmit D2D signals, ensuring efficient resource allocation and minimizing interference by cyclically shifting and reconfiguring resource units on the time and frequency axes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If orthogonal resource patterns are used for D2D signal transmission, then resource allocation efficiency is improved, but resource unit overlap causes interference between different UEs
Solution Approach 1:
The patent changes the parameters of resource patterns by introducing different axis-priority mapping methods (first axis-priority mapping for first orthogonal resource pattern, second axis-priority mapping for second orthogonal resource pattern). This parameter change allows the resource patterns to be configured such that overlapping resource units are minimized while maintaining orthogonal structure, thereby resolving the contradiction between resource allocation efficiency and interference reduction
Solution Approach 2:
The patent applies local quality by configuring different orthogonal resource patterns for different UEs in different local regions of the resource space. By using axis-priority mapping, specific resource units are selectively allocated to different UEs based on their local needs and interference conditions, allowing efficient resource utilization while minimizing interference in specific areas
2Quantity of substance
If resource units are allocated to multiple UEs, then system capacity is improved, but interference management becomes more difficult
Solution Approach 1:
The patent segments the resource space by dividing it into different orthogonal resource patterns with distinct axis-priority mappings. This segmentation allows multiple UEs to be allocated resource units in an organized manner, increasing system capacity while simplifying interference management through structured resource division rather than random allocation
Solution Approach 2:
The patent introduces dimensionality change by using axis-priority mapping that operates along different axes (time axis and frequency axis). This multi-dimensional approach to resource allocation allows the system to accommodate more UEs by utilizing resource patterns across multiple dimensions, thereby increasing system capacity while maintaining manageable interference levels through dimensional separation
Data Source
AI summary
The present disclosure describes a method and device for transmitting a device to device (D2D) signal by a first terminal in a wireless communication system. More particularly, the method comprises transmitting a D2D signal using at least one first resource unit corresponding to a first orthogonal resource pattern and at least one second resource unit corresponding to a second orthogonal resource pattern on a resource area, wherein the first orthogonal resource pattern is defined by at least one first resource unit number defined through a first axis-priority mapping and the second orthogonal resource pattern is defined by at least one second resource unit number defined through a second axis-priority mapping, and the at least one first resource unit and the at least one second resource unit are configured to overlap each other by a predetermined number or less of the resource units.