Wireless Communication Using Unified DCI for Multiple PDSCH Scheduling
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Solution Overview
Problem
Existing wireless communication systems face challenges in high signaling overhead and inefficiencies in scheduling multiple physical downlink shared channels (PDSCHs), particularly in applications requiring consecutive PDSCH transmissions, which affect communication performance and reliability.
Innovation Solution
Implementing a method and apparatus that utilize downlink control information (DCI) to schedule multiple PDSCHs, indicating their number and resource allocation, thereby reducing signaling overhead and enhancing communication reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple PDSCHs are scheduled using separate DCIs according to Rel. 15/16 specifications, then each PDSCH can be individually controlled, but the signaling overhead becomes excessively large
Solution Approach 1:
The patent merges multiple separate DCI signals into a single DCI that schedules multiple PDSCHs simultaneously. This combining approach reduces the total number of control signals transmitted while maintaining the ability to individually control each PDSCH through nested fields within the unified DCI structure.
Solution Approach 2:
The single DCI is designed with multi-functionality to serve multiple purposes - it can schedule multiple PDSCHs, indicate their time domain resource allocations, specify HARQ process numbers, and provide feedback timing information all within one control signal, making it a universal control mechanism.
2Adaptability or versatility
If many DCIs are used to schedule consecutive PDSCH transmissions, then scheduling flexibility is maintained, but communication efficiency decreases due to excessive signaling overhead
Solution Approach 1:
The patent segments the scheduling information within the single DCI using nested fields and indicators. The DCI contains a first indication field for time domain resource allocation, a second indication field for HARQ process number, and a third indication field for feedback timing, allowing flexible configuration of multiple PDSCHs through structured segmentation of control information.
Solution Approach 2:
The patent enables preliminary scheduling by allowing the DCI to indicate multiple future PDSCH transmissions in advance. The time domain resource allocation field can specify resources for multiple slots ahead, and the HARQ process number indication allows pre-configured retransmission plans, reducing the need for real-time control signals.
3Measurement precision
If separate DCIs are used for each PDSCH, then control precision is maintained, but the number of control signals increases significantly
Solution Approach 1:
The patent employs a nested structure where multiple control parameters are nested within the single DCI. The time domain resource allocation, HARQ process number, and feedback timing indicators are nested fields within the same control signal, allowing precise control of multiple PDSCHs without multiplying the number of control signals.
Data Source
AI summary
An apparatus and a method of wireless communication are provided. The method by a user equipment (UE) includes being configured, by abase station, with a downlink control information (DCI) scheduling physical downlink shared channels (PDSCHs) and indicating a number of the PDSCHs. This can solve issues in the prior art, reduce a signaling overhead, provide a method for multiple PDSCH scheduling, provide a good communication performance, and/or provide high reliability.