Multi-MCS Resource Allocation in 5G NR Wireless Systems
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Solution Overview
Problem
Current 5G communication systems face challenges in providing seamless services due to varying channel and interference characteristics across different frequency resources, particularly in the New Radio (NR) system, which requires efficient scheduling and data transmission schemes to cater to diverse service types like eMBB, URLLC, and mMTC.
Innovation Solution
The method involves determining whether to allocate transport blocks to different resource regions based on channel information and selecting appropriate modulation and coding schemes, with the base station transmitting control information indicating the resource allocation and transmission mode to terminals, allowing for flexible allocation of frequency and time resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single modulation and coding scheme (MCS) is used for data transmission, then the system is simple to implement, but the data rate cannot be optimized according to varying channel conditions across different frequency resources
Solution Approach 1:
The frequency resources are divided into multiple subbands, and each subband is assigned a separate MCS index from the network. This allows different modulation and coding schemes to be applied to different subbands based on their channel conditions, optimizing data rate while maintaining manageable system complexity through structured resource division.
Solution Approach 2:
Different MCS indices are applied to different subbands according to local channel conditions. Each subband can use the most appropriate modulation and coding scheme for its specific quality, rather than using a uniform MCS across all frequency resources, thereby maximizing overall throughput.
2Productivity
If multiple MCS indices are configured and selected based on channel conditions, then data transmission efficiency is improved, but the complexity of resource allocation and control information increases
Solution Approach 1:
The frequency spectrum is segmented into multiple subbands, each capable of being assigned a different MCS index. This segmentation allows the system to manage multiple MCS configurations in an organized manner, improving transmission efficiency without overwhelming complexity.
Solution Approach 2:
The system dynamically selects which subband(s) to transmit on and which MCS index to use based on current channel conditions. This dynamic adaptation allows the system to optimize performance in real-time while the terminal device determines the appropriate configuration based on received control information.
3Reliability
If frequency resources are divided into multiple subbands with different MCS indices, then channel conditions are better adapted, but the overhead for configuring and managing multiple MCS indices increases
Solution Approach 1:
The frequency resources are divided into multiple subbands, allowing the system to adapt to channel conditions in each subband independently. This segmentation improves reliability by matching transmission parameters to local channel quality while managing overhead through structured subband configuration.
Solution Approach 2:
The same PDSCH can serve multiple functions by supporting both single-subband and multi-subband transmission modes. The system can flexibly configure whether to use one MCS index across all subbands or multiple MCS indices for different subbands, reducing overhead by using a universal transmission framework that adapts to different scenarios.
Data Source
AI summary
The disclosure provides a method, performed by a base station, of transmitting or receiving data, the method including: determining whether to respectively allocate a plurality of transport blocks to different resource regions, based on channel information; determining, based on a result of the determining, a resource region to which the plurality of transport blocks are allocated and a modulation and coding scheme of the plurality of transport blocks; and transmitting, to a terminal, first downlink control information including an indicator of a transmission mode which indicates whether the plurality of transport blocks are allocated to different resource regions and resource allocation information of a resource region to which the plurality of transport blocks are allocated.