D2D Resource Allocation via Clean Dirty Unit Segmentation
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently allocating resources for device-to-device communication, particularly in managing interference and optimizing resource usage for effective signal transmission and reception in LTE networks.
Innovation Solution
A method for allocating resources in device-to-device communication that involves identifying clean and dirty resource units based on interference levels, where clean units are used for reception and dirty units with lower interference are used for transmission, to minimize mutual interference and optimize performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If resources are allocated for device-to-device communication without separating transmission and reception resources, then resource utilization is improved, but mutual interference between transmitting and receiving devices increases
Solution Approach 1:
The resource pool is segmented into separate transmission resources and reception resources. Transmitting devices select resources from the transmission resource pool, while receiving devices select resources from the reception resource pool. This segmentation prevents mutual interference by ensuring that transmitting and receiving operations occur on different resource sets, thereby resolving the contradiction between resource utilization and interference avoidance.
2Productivity
If the same resource pool is used for both transmission and reception in D2D communication, then resource efficiency is improved, but signal quality deteriorates due to interference
Solution Approach 1:
The resource pool is divided into distinct transmission and reception resource pools. This segmentation allows the system to maintain high resource efficiency by dedicating specific resources to each function while ensuring signal quality by preventing interference through separate resource allocation for transmitting and receiving devices.
3Ease of operation
If resource allocation does not consider interference levels, then allocation simplicity is maintained, but communication performance decreases
Solution Approach 1:
The system applies different resource pool configurations to different communication scenarios based on local conditions. For example, in-coverage devices use one resource pool configuration while out-of-coverage devices use another. This local quality approach optimizes communication performance for each scenario while maintaining operational simplicity through standardized pool definitions.
Solution Approach 2:
The system changes resource allocation parameters based on device coverage status and interference conditions. Devices in different coverage areas are assigned different resource pools with different parameters, allowing the system to adapt to varying interference levels and communication requirements while maintaining simple allocation procedures through pre-configured pools.
Data Source
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AI summary
Disclosed is a method by which a transmission terminal transmits a signal by using device-to-device direct communication in a wireless communication system. Particularly, the method comprises the steps of: identifying each of a plurality of resource units as a clean unit or a dirty unit; selecting one of the clean units as a transmission resource if the number of clean units is a first threshold value or more; selecting, as the transmission resource, one among the one or more dirty units from which interference that is a second critical value or more is detected if the number of clean units is less than the first threshold value; and transmitting a device-to-device direct communication signal by using the selected transmission resource.