Virtual Domain Resource Allocation in 5G Wireless Systems
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Solution Overview
Problem
Current wireless communication systems, particularly 5G, face challenges in efficiently allocating resources to support diverse services such as enhanced mobile broadband (eMBB), massive machine-type communications (mMTC), and ultra-reliable low-latency communications (URLLC), requiring advanced techniques to manage resource allocation effectively across different frequency bands and transmission techniques.
Innovation Solution
A method and device that include a base station and terminal equipped with a controller to transmit and receive resource allocation information on a physical downlink shared channel (PDSCH) and virtual domain resources, with discrete Fourier transform (DFT) precoding applied to multiplexed PDSCH signals, enabling effective data transmission and reception using DFT-S-OFDM.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If resource allocation is performed in traditional frequency-time domain only, then implementation is simple, but it cannot efficiently support diverse 5G services (eMBB, mMTC, URLLC) with different requirements
Solution Approach 1:
The patent introduces a virtual domain dimension alongside the traditional frequency-time domain, creating a four-dimensional resource allocation space. Virtual resource blocks (VRBs) are mapped to physical resource blocks (PRBs) through transformation functions, enabling diverse service requirements to be satisfied by allocating resources in different domain combinations without significantly increasing implementation complexity
Solution Approach 2:
The patent segments the resource allocation space into multiple domains (frequency domain, time domain, and virtual domain), allowing different service types to be allocated in different segments. This segmentation enables eMBB, mMTC, and URLLC services to obtain dedicated resource portions with appropriate characteristics for their specific requirements
2Productivity
If DFT precoding is applied to multiplexed PDSCH signals, then data transmission efficiency is improved, but processing complexity increases
Solution Approach 1:
The patent applies DFT precoding in advance to the PDSCH signals before multiplexing and transmission. By performing the computationally intensive DFT operation beforehand, the system optimizes the signal structure for efficient transmission while managing processing complexity through pre-computation rather than real-time processing during transmission
3Productivity
If virtual domain resource allocation is implemented, then resource utilization efficiency is improved, but control information overhead increases
Solution Approach 1:
The patent designs the virtual domain resource allocation mechanism to serve multiple purposes simultaneously: it enables efficient resource utilization for diverse services, provides flexibility in resource mapping, and maintains compatibility with existing physical layer structures. The virtual resource block concept functions as both an allocation abstraction layer and a transformation domain, reducing the need for separate control mechanisms
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances data transmission and reception by effectively managing resource allocation across different services, improving coverage and efficiency in 5G communication systems, particularly in supporting a large number of terminals and ensuring low latency and high reliability.
Implementation Method 1
to perform discrete Fourier transform (DFT) precoding on the multiplexed PDSCH
Data Source
AI summary
The present disclosure relates to a communication technique for combining IoT technology and a 5G communication system for supporting a higher data transmission rate than a 4G system, and a system therefor. The present disclosure may be applied to intelligent services (e.g., smart home, smart building, smart city, smart car or connected car, healthcare, digital education, retail, security- and safety-related services, etc.) on the basis of 5G communication technology and IoT-related technology. According to an embodiment of the present disclosure, a method by a base station in a wireless communication system comprises the steps of: transmitting, to a terminal, downlink control information comprising resource allocation information for a virtual domain and resource allocation information for a physical downlink shared channel (PDSCH); multiplexing the PDSCH in a virtual domain resource on the basis of the resource allocation information for the virtual domain; and performing discrete fourier transform (DFT) precoding for the multiplexed PDSCH.