D2D Resource Allocation via Clean Dirty Unit Segmentation
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Solution Overview
Problem
Current wireless communication systems, such as LTE, face challenges in efficiently allocating resources for device-to-device communication, leading to interference and reduced performance due to inadequate resource selection methods.
Innovation Solution
The method involves dividing resource units into clean and dirty units based on interference levels and channel gains, with the processor selecting appropriate transmission resources to minimize interference and optimize signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If resource units are selected without considering interference levels, then resource allocation is simple, but interference increases and system performance deteriorates
Solution Approach 1:
The patent segments resource units into two categories: clean resource units (with interference below a threshold) and dirty resource units (with interference above the threshold). This segmentation allows the system to apply different selection strategies - preferring clean units to minimize interference while still permitting dirty unit selection when necessary, thus resolving the contradiction between reducing interference and maintaining selection simplicity.
Solution Approach 2:
The patent introduces an interference threshold parameter that dynamically guides resource unit selection. By comparing measured interference levels against this parameter, the system automatically adjusts its selection behavior - selecting from clean units when available to reduce interference, while maintaining the ability to use dirty units when needed, thus balancing interference reduction with operational simplicity.
2Object-affected harmful factors
If only clean resource units are selected, then interference is minimized, but available transmission resources decrease
Solution Approach 1:
The patent applies partial action by not requiring exclusive use of clean resource units. Instead, it establishes a preference hierarchy: clean units are preferred to minimize interference, but dirty units can be selected when clean units are insufficient or under certain conditions. This partial application of the 'clean-only' rule maintains enough transmission resources available while still achieving interference reduction where possible.
3Reliability
If resource allocation considers both interference levels and transmit power, then transmission reliability improves, but computational complexity increases
Solution Approach 1:
The patent performs preliminary classification of resource units into clean and dirty categories based on interference levels before the actual transmission decision. This preliminary action separates the complex interference assessment from the final resource selection, allowing the system to make faster decisions during transmission by simply referencing the pre-classified categories rather than re-evaluating all parameters in real-time.
Solution Approach 2:
The system uses the measured interference levels and transmit power parameters to automatically determine resource unit suitability without requiring complex external coordination. Each user equipment can independently assess its transmission conditions and select appropriate resource units based on the established clean/dirty classification and threshold comparisons, enabling self-service resource allocation that improves reliability while limiting complexity growth.
Data Source
AI summary
Disclosed in the present application is a method by which a transmission terminal transmits a signal by using device-to-device communication in a wireless communication system. Particularly, the method comprises the steps of: dividing each of a plurality of resource units into clean units and dirty units; selecting at least one of the clean units as a transmission resource when the number of clean units is greater than or equal to a first threshold value; selecting at least one of the dirty units as the transmission resource when the number of clean units is less than the first threshold value; and transmitting a device-to-device communication signal by using the selected transmission resource, wherein the transmission resource selected among the dirty units is determined on the basis of the transmission power of the device-to-device communication signal.