DCI Format Segmentation for 2-Step Random Access Scheduling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently transmitting downlink control information (DCI) during the 2-step random access procedure in NR, particularly in scheduling the downlink shared channel effectively.
Innovation Solution
A method is introduced where a network device determines the format of DCI used for scheduling the downlink shared channel in a 2-step random access procedure. This involves determining an identifier for scrambling the cyclic redundancy check (CRC) of the DCI format, which can be either a common or specific identifier. The network device then transmits information regarding the scheduled downlink shared channel with the formatted DCI and scrambled CRC on a downlink control channel to terminal devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If DCI format and identifier are optimized for msgB scheduling, then scheduling efficiency is improved, but device complexity increases
Solution Approach 1:
The patent segments the DCI format into different types (first DCI format and second DCI format) with distinct identifier sets. The first DCI format uses a first set of identifiers while the second DCI format uses a second set of identifiers. This segmentation allows the system to optimize scheduling efficiency for msgB while maintaining manageable complexity through structured differentiation of control information formats.
Solution Approach 2:
The patent introduces dynamic determination of DCI format based on scheduling needs. The network device dynamically selects between first and second DCI formats depending on the specific scheduling requirements for downlink shared channel in 2-step random access procedure. This dynamic approach enables optimization of scheduling efficiency while adapting to different operational contexts.
2Adaptability or versatility
If multiple identifiers are used for DCI CRC scrambling, then adaptability is improved, but signaling overhead increases
Solution Approach 1:
The patent segments identifiers into distinct sets associated with different DCI formats. The first set of identifiers is paired with the first DCI format while the second set is paired with the second DCI format. This segmentation enables the system to adapt to different scheduling scenarios by selecting appropriate identifier sets, while the structured organization prevents unnecessary signaling overhead by using identifiers only when needed.
Solution Approach 2:
The patent changes the parameter of identifier selection based on the DCI format being transmitted. By dynamically adjusting which identifier set is used depending on whether the first or second DCI format is employed, the system achieves adaptability to different scheduling needs while minimizing signaling overhead through parameter-based differentiation rather than explicit signaling.
Data Source
AI summary
Methods and apparatuses for downlink control information. A method at a network device comprises determining a format of downlink control information (DCI) used for scheduling of downlink shared channel in a 2-step random access procedure. The method further comprises determining an identifier used for scrambling cyclic redundancy check (CRC) of the format of DCI. The identifier comprises at least one of a common identifier or a specific identifier. The method further comprises transmitting information regarding a scheduled downlink shared channel with the format of DCI with the CRC scrambled by the identifier on a downlink control channel to at least one terminal device.