Multi-TTI Scheduling in Unlicensed Band Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently scheduling and transmitting data in unlicensed bands, particularly in supporting multiple transmission time intervals (TTIs) and ensuring reliable communication in scenarios like autonomous driving vehicles.
Innovation Solution
A method and apparatus for transmitting and receiving signals in a wireless communication system that involves receiving scheduling information for consecutive TTIs, with the processor determining the starting and ending symbols based on a combination of a first symbol index and the number of consecutive symbols, allowing for efficient data transmission across multiple TTIs in an unlicensed band.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data is transmitted across multiple consecutive TTIs in unlicensed bands, then communication capacity and reliability are improved, but scheduling complexity and resource management difficulty increase
Solution Approach 1:
The patent segments the scheduling information into two distinct parts: a first indicator value indicating the starting symbol index, and a second indicator value indicating the number of consecutive symbols. This segmentation allows the system to efficiently represent multi-TTI data transmissions without requiring complex scheduling messages, thereby improving communication reliability while keeping scheduling complexity manageable.
Solution Approach 2:
The patent introduces a new dimension for resource allocation by using symbol-level granularity across multiple TTIs. Instead of allocating resources at the traditional TTI level, the system allocates specific symbols within TTIs, enabling more flexible and efficient spectrum utilization in unlicensed bands while maintaining straightforward scheduling mechanisms.
2Productivity
If symbol-level resource allocation is implemented across multiple TTIs, then spectrum utilization efficiency is improved, but signaling overhead and processing requirements increase
Solution Approach 1:
The patent merges the starting symbol index and the number of consecutive symbols into a compact scheduling information structure that can be transmitted efficiently. By combining these two indicator values in a unified signaling format, the system achieves fine-grained symbol-level resource allocation across multiple TTIs while minimizing signaling overhead and avoiding excessive processing requirements.
Data Source
AI summary
The present invention relates to a wireless communication system and, specifically, to a method and an apparatus therefor, the method comprising the steps of: receiving scheduling information for a plurality of consecutive transmission time intervals (TTIs) and transmitting data on the basis of the scheduling information, wherein the scheduling information includes a combination of a first symbol index and the number of consecutive symbols, the data is transmitted from a starting symbol of a first TTI (starting TTI) among the plurality of consecutive TTIs to an ending symbol of the last TTI on the basis of the scheduling information, and the index of the starting symbol and the index of the ending symbol are determined on the basis of the combination of the first symbol index and the number of the consecutive symbols.