D2D Radio Resource Allocation via Inter-Cell Distance
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Solution Overview
Problem
Current radio resource allocation techniques in device-to-device (D2D) communication fail to effectively mitigate interference from devices outside the same cell or not covered by any cell, leading to inefficiencies and reliability issues in D2D communications.
Innovation Solution
A method that identifies relevant devices outside the same cell or not covered by any cell, determines their location and distance parameters, and allocates radio resources based on these parameters to minimize interference, using a computer-implemented system that assesses and adjusts transmit power levels to optimize resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radio resources are allocated only within the same cell, then resource allocation is simple and eNB control is effective, but interference from devices outside the cell or not covered by any cell cannot be mitigated
Solution Approach 1:
The patent extends resource allocation from a single-cell dimension to a multi-cell dimension by considering devices in neighboring cells and out-of-coverage devices. The eNB allocates resources not only within its own cell but also coordinates with neighboring eNBs to manage interference across multiple cells, effectively adding a spatial dimension to resource allocation.
Solution Approach 2:
The patent introduces an intermediary mechanism where the eNB acts as a coordinator between D2D devices within its cell and devices in other cells or without coverage. The eNB exchanges resource allocation information with neighboring eNBs and uses this information to make informed resource allocation decisions that mitigate interference from external devices.
2Reliability
If distance parameters and location information are considered for resource allocation, then interference mitigation is improved, but calculation complexity and processing overhead increase
Solution Approach 1:
The patent applies partial action by considering only the most relevant distance parameters and location information that have the greatest impact on interference mitigation. Instead of calculating all possible parameters, the system focuses on key metrics such as distance between D2D devices and potential interferers, and uses this partial information to make effective resource allocation decisions.
3Reliability
If transmit power levels are adjusted to minimize interference, then communication quality is maintained, but energy consumption increases
Solution Approach 1:
The patent implements dynamic transmit power adjustment where the eNB continuously monitors interference conditions and adapts power levels in real-time. Instead of using fixed high power levels, the system dynamically optimizes power consumption by adjusting transmit power based on current interference conditions, distance parameters, and resource allocation decisions, thereby maintaining communication quality while minimizing energy consumption.
Data Source
AI summary
A method for allocating radio resources for a D2D communication between a first device and a second device is disclosed. The method includes identifying device(s) relevant for the D2D communication between the first and second devices, obtaining location information for the identified device(s), determining a value of a distance parameter for each of the identified devices using the location information obtained for the device and one or both of location information for the first device and location information for the second device, and allocating one or more radio resources for the D2D communication between the first device and the second device based on the determined value of the distance parameter.