Subband Precoding for Wireless Scheduling Efficiency
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Solution Overview
Problem
Current wireless communication systems, such as LTE, face challenges in efficiently performing downlink scheduling due to limitations in resource allocation and precoding methods, which affect data transmission efficiency and flexibility, especially in next-generation systems requiring improved competitiveness, cost reduction, and increased service availability.
Innovation Solution
The method involves a user equipment (UE) receiving information about resource blocks allocated in a wideband and precoders indicated in units of subbands from a base station, configuring these resource blocks into subbands, and applying the precoders to transmit uplink signals through these subbands, enabling efficient downlink scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If downlink scheduling is performed using traditional wideband resource allocation methods, then system compatibility and simplicity are maintained, but data transmission efficiency and flexibility are limited
Solution Approach 1:
The patent divides the wideband frequency spectrum into multiple subbands, allowing independent scheduling and precoding application for each subband. This segmentation enables the system to achieve frequency-selective scheduling benefits while maintaining compatibility with existing wideband resource allocation frameworks, thus improving data transmission efficiency without proportionally increasing scheduling complexity
Solution Approach 2:
The patent applies different precoding matrices to different subbands based on local channel conditions. By configuring subband-specific precoding information and applying it to corresponding resource blocks within each subband, the system optimizes transmission quality locally in each frequency region while maintaining overall system coordination, thereby enhancing transmission efficiency without requiring complete reconfiguration of the scheduling system
2Productivity
If subband-specific precoding is applied to improve transmission efficiency, then data transmission efficiency increases, but resource allocation complexity increases
Solution Approach 1:
The patent performs preliminary configuration of subband information, including determining subband boundaries and configuring precoding matrices for each subband before actual data transmission. By pre-configuring subband-specific parameters and storing them for later use, the system reduces the operational complexity during actual resource allocation while maintaining the efficiency benefits of subband-specific precoding
Solution Approach 2:
The patent enables the user equipment to self-determine subband information based on received wideband resource block allocation and subband configuration parameters. The UE autonomously maps resource blocks to specific subbands and applies the appropriate precoding matrices without requiring detailed step-by-step instructions from the base station, thereby simplifying the resource allocation process while maintaining subband optimization
Data Source
AI summary
Disclosed in the present application is a method for a terminal transmitting an uplink signal in a wireless communication system. Particularly, the method comprises the steps of: receiving, from the base station, allocation information for resource blocks in a wideband and information on precoders indicated in sub-band units; configuring the allocated resource blocks into sub-bands including two or more continuous resource blocks; and transmitting the uplink signal through the sub-bands to the base station by applying the precoders to corresponding sub-bands.