5G NR Scheduling Using Default Tables for Pre-RRC Uplink
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 5G wireless communication systems, there is a need for efficient scheduling of uplink and downlink transmissions, particularly in new radio (NR) systems, where terminals must determine time-domain resources for PUSCH or PDSCH transmission before establishing an RRC connection, as existing methods rely on pre-configured tables that may not account for the terminal's minimum processing time or default modes.
Innovation Solution
The method involves using downlink control information (DCI) through a control resource set (CORESET) to indicate time-domain resources for PUSCH or PDSCH transmission, with the base station determining and communicating these resources based on the position of the CORESET in a slot, employing default time-domain resource assignment tables to ensure accurate scheduling even before RRC configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If pre-configured tables are used for time-domain resource assignment before RRC connection, then scheduling can be performed without prior configuration, but the terminal's minimum processing time requirements may not be met
Solution Approach 1:
The patent changes the parameters of time-domain resource assignment by introducing multiple default tables with different K2 values (slot offsets) and corresponding PUSCH mapping types. The base station selects appropriate tables based on CORESET position and terminal capability, ensuring that the selected time-domain resources meet the terminal's minimum processing time requirements while enabling scheduling before RRC connection is established.
2Device complexity
If a single default time-domain resource assignment table is used, then the system is simple to implement, but it cannot adapt to different terminal processing capabilities and CORESET positions
Solution Approach 1:
The patent segments the time-domain resource assignment into multiple default tables (first default table, second default table, third default table, etc.), each containing different K2 values and PUSCH mapping type combinations. This segmentation allows the system to select the most appropriate table based on terminal processing capability and CORESET position, achieving adaptability without requiring a single complex configuration.
Solution Approach 2:
The patent introduces dynamic selection mechanisms where the base station determines which default table to use based on terminal capability information and CORESET position. The system dynamically adapts the time-domain resource assignment parameters (K2 values, PUSCH mapping types) to match the specific terminal and scenario, rather than using a static single-table approach.
3Productivity
If time-domain resources are assigned without considering CORESET position, then the scheduling process is simplified, but the terminal may not have sufficient processing time to prepare transmissions
Solution Approach 1:
The patent performs preliminary determination of appropriate default tables based on terminal capability and CORESET position before actual resource assignment. By pre-establishing multiple tables with different K2 values and PUSCH mapping types, and selecting the suitable one in advance, the system ensures that the terminal receives time-domain resources that provide sufficient processing time, avoiding transmission failures due to insufficient preparation time.
Data Source
AI summary
The present disclosure relates to a communication technique for converging, with an IoT technology, a 5G communication system for supporting a higher data transfer rate than 4G systems, and a system therefor. The present disclosure may be applied to 5G communication technology and IoT related technology-based intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, health care, digital education, retail, security and safety related services, etc.). The present invention relates to a scheduling method and apparatus for uplink data transmission and downlink data reception.