Beam-Aware DCI Scheduling Across Time Units for URLLC Reliability
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Solution Overview
Problem
High-frequency channels in new generation communication systems attenuate quickly, necessitating efficient beam-based data transmission to ensure low latency and high reliability for URLLC services, which existing methods struggle to achieve.
Innovation Solution
A method and device for indicating transmission by generating DCI signaling that schedules transmission blocks (TBs) in multiple designated time units, specifying start and end symbols, beam indication information, and antenna panel identifiers to optimize beam usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam-based data transmission is used to combat high-frequency channel attenuation, then coverage and reliability are improved, but system complexity and overhead increase
Solution Approach 1:
The patent segments the beam indication information into two parts: a first beam indication information carried in DCI format 0_2/1_2 for primary beam direction, and a second beam indication information for secondary beam directions. This segmentation allows the system to provide comprehensive beam coverage while keeping the overhead of each individual indication manageable, thus improving reliability without excessive complexity increase.
Solution Approach 2:
The patent introduces a new dimension for beam indication by embedding beam direction information within the SRS resource indication field of DCI format 0_2/1_2. This dimensional approach allows multiple beam directions to be indicated simultaneously through resource allocation, reducing the need for separate signaling fields and thereby managing system complexity while improving communication reliability.
2Reliability
If multiple beam directions are indicated for different time units, then transmission reliability is improved, but signaling overhead increases
Solution Approach 1:
The patent makes the SRS resource indication field serve multiple functions: it simultaneously indicates SRS resources for uplink transmission and embedded beam indication information. This multi-functionality allows the system to convey multiple beam directions for different time units without adding separate dedicated signaling fields, thus improving transmission reliability while controlling signaling overhead.
Solution Approach 2:
The patent changes the interpretation and encoding parameters of the SRS resource indication field to include beam direction information. By modifying how this existing field is parameterized and decoded, the system can indicate multiple beam directions without increasing the raw signaling bits, thereby reducing overhead while improving reliability.
3Productivity
If DCI format 0_2/1_2 is used for scheduling, then flexibility and efficiency are improved, but compatibility and robustness deteriorate
Solution Approach 1:
The patent applies prior cushioning by maintaining compatibility with existing DCI format structures and decoding procedures while embedding additional beam indication information. This approach cushions against potential robustness issues by ensuring that existing receivers can still decode the DCI formats, while new functionality is added in a backward-compatible manner, thus preserving both efficiency and robustness.
Data Source
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AI summary
Provided are a transmission indication method and apparatus. Said method is applied to a base station, and comprises: determining the transmission of one or more TBs on a first number of specified time units, the first number being an integer greater than 1; generating first downlink control information (DCI) signaling, the first DCI signaling being used for indicating the transmission of the TBs in each of the specified time units; and sending the first DCI signaling to a terminal, so that the terminal transmits the TBs in each of the specified time units according to the first DCI signaling. Therefore, the disclosure indicates, by means of DCI, the transmission of TBs in different time units by using different beam directions, and also improves the communication robustness.