Distributed Scheduling for D2D Resource Allocation
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Solution Overview
Problem
The existing D2D communication systems face challenges in efficiently allocating resources due to interference and the inability to consider channel information from adjacent devices, leading to suboptimal capacity and increased overhead in scheduling.
Innovation Solution
A distributed scheduling method where devices share resource information and channel quality feedback to adjust resource allocation, allowing for optimal capacity utilization while minimizing interference influence, by broadcasting and adjusting resource allocation demands and positions based on measured channel conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If distributed scheduling is implemented without considering adjacent device channel information, then device complexity is reduced and ease of operation is improved, but resource allocation efficiency deteriorates and interference increases
Solution Approach 1:
The patent introduces an intermediary mechanism where reception devices measure channel quality information (CQI) related to adjacent devices and provide feedback to transmission devices. This intermediary feedback loop enables transmission devices to adjust their resource allocation decisions based on actual channel conditions without requiring complex centralized coordination, thus resolving the contradiction between operational simplicity and allocation efficiency
Solution Approach 2:
The patent implements a feedback mechanism where reception devices continuously measure and report CQI to transmission devices. This feedback enables dynamic adjustment of resource allocation based on real-time channel conditions, allowing the system to achieve high resource allocation efficiency while maintaining distributed control and operational simplicity
2Device complexity
If resource allocation is performed without considering interference from adjacent links, then device complexity is reduced, but transmission rate and capacity deteriorate
Solution Approach 1:
The patent enables transmission devices to autonomously determine their own resource allocation by self-measuring or receiving CQI information about adjacent links and independently adjusting their resource selection. This self-service approach eliminates the need for complex centralized scheduling management while simultaneously enabling interference-aware resource allocation that maintains high transmission rates
3Productivity
If channel quality measurement and feedback is implemented for adjacent devices, then resource allocation efficiency is improved and interference is minimized, but loss of information and overhead increase
Solution Approach 1:
The patent implements local quality measurement by having each reception device measure CQI specifically for its own transmission device and adjacent transmission devices. This localized measurement approach provides sufficient information for efficient resource allocation without requiring global channel state information, thus achieving high resource allocation efficiency while minimizing control overhead
4Productivity
If centralized scheduling is used to manage resource allocation, then resource allocation efficiency is improved, but device complexity and eNB load increase
Solution Approach 1:
The patent extracts the scheduling decision-making function from the eNB and relocates it to the user devices themselves. Transmission devices independently determine resource allocation based on CQI feedback about adjacent links, eliminating the need for complex centralized scheduling management at the eNB while maintaining efficient resource allocation through distributed intelligence
Data Source
AI summary
An apparatus is configured to perform a method for performing distributed scheduling by a reception device configuring a target link corresponding to one of a plurality of links in a network in which the plurality of links for device to device communication exist. The method includes adding up resource allocation demand amounts included in resource information broadcasted by a counterpart device configuring the target link and one or more adjacent transmission devices by a preset Resource Unit (RU), and adjusting self resource information in consideration of resource position information included in the broadcasted resource information and the added resource allocation demand amount and transmitting the adjusted self resource information to the counterpart transmission device.