PDSCH Rate Matching via Dynamic DCI Indicator Bitwidth
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems, such as 5G NR and LTE, face challenges in efficiently performing rate matching for the physical downlink shared channel (PDSCH) due to varying transmission requirements and interference management across different services and frequency domains.
Innovation Solution
The method involves monitoring for different downlink control information (DCI) formats, determining the bitwidth of the rate matching indicator field, and performing PDSCH rate matching based on the format and indicator field to optimize resource allocation and interference management for PDSCH scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If rate matching is performed using fixed DCI formats, then the structure is simple, but the system cannot adapt to varying transmission requirements and service types
Solution Approach 1:
The patent introduces dynamic rate matching by allowing the rate matching indicator field bitwidth to vary based on DCI format type. Different DCI formats (e.g., format 1_0, 1_1, 1_2) are assigned different bitwidths (0, 1, or 2 bits) for the rate matching indicator, enabling the system to adapt to varying transmission requirements while maintaining a manageable complexity through standardized configuration rules.
2Measurement precision
If rate matching indicator field bitwidth is increased, then rate matching precision is improved, but DCI format size and processing complexity increase
Solution Approach 1:
The patent applies local quality by assigning different bitwidths to the rate matching indicator field based on the specific DCI format requirements. Instead of using a uniform bitwidth for all DCI formats, the system uses 0 bits for format 1_0, 1 bit for format 1_1, and 2 bits for format 1_2, optimizing the balance between rate matching precision and DCI format size for each specific case.
Solution Approach 2:
The patent changes the parameter of rate matching indicator bitwidth dynamically based on the DCI format type. The system configurations allow the bitwidth to be set to different values (0, 1, or 2) depending on the DCI format, enabling precise control over rate matching while managing the overall complexity through parameterization rather than fixed complex processing.
3Adaptability or versatility
If multiple DCI formats are monitored, then scheduling flexibility is improved, but monitoring and processing complexity increases
Solution Approach 1:
The patent implements universality by defining a unified rate matching procedure that handles multiple DCI formats (1_0, 1_1, 1_2) through a single set of configuration rules. The UE monitors for multiple DCI formats but processes them using the same logical framework, where the bitwidth determination and rate matching execution follow consistent patterns, thereby reducing the actual processing complexity despite the multi-format capability.
Data Source
AI summary
Aspects of the present disclosure provide apparatus, methods, processing systems, and computer readable mediums for performing rate matching for a physical downlink shared channel (PDSCH). An example method generally includes monitoring for at least first and second downlink control information (DCI) formats for scheduling a physical downlink shared channel (PDSCH), determining a bitwidth of a rate matching indicator field of at least one of the first DCI format or the second DCI format, and performing PDSCH rate matching for a PDSCH scheduled by a DCI of the first or second DCI format based, at least in part, on the rate matching indicator field in the DCI or a format of the DCI.