User Terminal Downlink Signal Multiplexing via Resource Block Group Segmentation
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Solution Overview
Problem
In future radio communication systems, using a single carrier like DFT-s-OFDM limits the number of terminals that can be multiplexed in a Transmission Time Interval (TTI), resulting in less efficient use of bandwidth compared to OFDM.
Innovation Solution
A user terminal is configured with a reception section to receive downlink signals mapped to multiple signal transmission points and an extraction section to extract signals assigned to specific resource block groups, allowing for efficient multiplexing of downlink signals for multiple terminals within a single carrier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a single carrier like DFT-s-OFDM is used for downlink transmission, then low PAPR is achieved, but the number of terminals that can be multiplexed in a TTI is reduced
Solution Approach 1:
The patent divides the frequency resources into multiple resource block groups (RBGs), where each RBG can be independently assigned to different terminals. This segmentation allows multiple terminals to be multiplexed within a single carrier by allocating different RBGs to different terminals, thereby resolving the contradiction between maintaining low PAPR and increasing the number of multiplexed terminals.
2Loss of energy
If transmission is made using the entire bandwidth in a single carrier, then low PAPR is achieved, but bandwidth utilization efficiency is reduced
Solution Approach 1:
The patent enables different resource block groups to be allocated to different terminals based on their specific requirements and channel conditions. This local quality approach allows each terminal to receive signals in optimally allocated frequency regions while maintaining the single carrier structure, thereby improving bandwidth utilization efficiency without increasing PAPR.
Data Source
AI summary
In user terminal 20, reception section 204 receives one or more downlink signals mapped to a plurality of signal transmission points in a single carrier, and extraction section 214 extracts at least one of the one or more downlink signals that is assigned to at least one of the signal transmission points that belongs to a resource block group associated with user terminal 20, in which the resource block group is in units of a predetermined number of signal transmission points and the at least one of the one or more downlink signals is extracted based on a definition of the resource block group. This processing makes it possible to multiplex downlink signals for a plurality of terminals in a single-carrier transmission.