HARQ Identifier Logic for Base Station Carrier Aggregation
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Solution Overview
Problem
Current multicarrier communication systems face challenges in efficiently managing carrier aggregation and hybrid automatic repeat request operations, particularly in supporting diverse radio conditions and modulation schemes, which affects data transmission reliability and efficiency.
Innovation Solution
The implementation of orthogonal frequency division multiplexing (OFDM) with dynamic modulation and coding schemes, along with carrier aggregation techniques, allows for flexible transmission mechanisms and improved channel state information management, enabling efficient data transmission across multiple carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If carrier aggregation and dynamic modulation schemes are implemented, then data transmission efficiency and reliability are improved, but system complexity increases
Solution Approach 1:
The patent segments the system into distinct functional modules: a determining module that identifies HARQ process IDs, a receiving module that processes transport blocks, and a transmitting module that sends ACK/NACK signals. This segmentation allows complex HARQ management across multiple carriers to be handled through coordinated simple operations in each module, improving reliability while managing system complexity.
Solution Approach 2:
The patent implements a universal HARQ process ID determination mechanism that works across multiple component carriers with different modulation schemes and radio conditions. The same core logic (determining HARQ ID based on transport block reception) is applied universally across all carriers, enabling the system to handle diverse transmission scenarios with a unified approach, thereby improving reliability without proportionally increasing complexity.
2Productivity
If multiple component carriers with diverse modulation schemes are used, then data transmission efficiency is improved, but management complexity increases
Solution Approach 1:
The patent applies local quality by allowing each component carrier to have its own modulation scheme and transmission characteristics tailored to its specific radio conditions, while the HARQ management mechanism provides a unified framework. Each carrier can be optimized locally for its conditions (different modulations, coding rates) without requiring a completely separate management system for each, thus improving overall transmission efficiency while controlling management complexity through the standardized HARQ process ID assignment.
Data Source
AI summary
A base station transmits a radio resource control message. The radio resource control message comprises a periodicity parameter indicating a number of symbols. A downlink control information is transmitted. The downlink control information indicates activation of a periodic resource allocation. The downlink control information comprises one or more fields indicating a numerology. Transport block associated with a hybrid automatic repeat request (HARQ) process identifier is received a via radio resources associated with the periodic resource allocation. The HARQ identifier is based on the numerology and the number of symbols.