D2D Communication RF Chain Management for Latency Reduction
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Solution Overview
Problem
Current mobile communication systems face challenges in managing explosive data traffic, resource shortages, and high latency due to increased user demands, necessitating enhanced technologies for improved throughput, low latency, and energy efficiency in device-to-device (D2D) communication.
Innovation Solution
A method for D2D communication that involves a UE transmitting TX/RX chain information to an eNB, receiving resource pool configuration messages, and performing D2D signal transmission using one or more RF chains, with power control and synchronization, to minimize latency and manage resource overlaps between cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If D2D communication is performed in overlapping resource pools of multiple cells, then resource utilization increases, but transmission latency increases due to arbitration and resource selection conflicts
Solution Approach 1:
The network pre-configures multiple D2D resource pools for different cells and provides D2D resource pool configuration information to UEs before they need to perform D2D communication. This allows UEs to have advance knowledge of available resources in neighboring cells, enabling them to make immediate transmission decisions without latency-inducing arbitration processes when resource pools overlap.
2Reliability
If a UE uses multiple RF chains for simultaneous D2D signal transmission to multiple eNBs, then communication reliability improves, but device complexity increases
Solution Approach 1:
The UE autonomously determines whether to use one or multiple RF chains for D2D signal transmission based on the received D2D resource pool configuration information and transmission conditions. The UE self-manages the selection and configuration of RF chains without requiring complex network-controlled resource allocation, thereby improving communication reliability through diverse transmission paths while keeping device complexity manageable through autonomous decision-making.
3Adaptability or versatility
If D2D resource pools are configured for multiple neighboring cells, then network coverage and adaptability improve, but signal interference and resource conflicts increase
Solution Approach 1:
Different D2D resource pools are configured with distinct resource allocations, time-frequency structures, and parameter settings optimized for each specific cell's local conditions. When UEs receive D2D resource pool configuration information from multiple eNBs, they can identify and utilize resources that are locally optimal for each cell, thereby expanding network coverage and adaptability while minimizing signal interference through localized resource optimization.
Data Source
AI summary
A method for performing, by a first UE, device-to-device (D2D) communication in a wireless communication system includes: transmitting, to a first eNB, transmission/reception (TX/RX) chain number information indicating the number of supported TX/RV radio frequency (RF) chains; receiving, from the first eNB, a first control message including D2D resource pool configuration information of the first eNB; receiving, from the first eNB, a second control message including D2D resource pool configuration information of a second eNB; and transmitting a first D2D signal to the first eNB and/or transmitting a second D2D signal to the second eNB using one or more TX RF chains when a predetermined condition is satisfied.