Terminal Codebook Multiplexing for Overlapping HARQ-ACK Slots
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Solution Overview
Problem
There is a need to develop a method for generating a codebook that handles the overlap of slots containing codebooks for response signals in dynamically-scheduled and semi-statically-scheduled signals across different cells in radio communication systems, particularly in the context of 5G and New Radio (NR) technologies, where existing solutions do not effectively manage the overlap of dynamic and semi-persistent scheduling for HARQ-ACK feedback.
Innovation Solution
A terminal and radio communication method that multiplexes and transmits codebooks for response signals from dynamically-scheduled and semi-statically-scheduled signals across different cells, allowing for the overlap of HARQ-ACK slots on different carriers, thereby reducing latency and improving communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If slots containing codebooks for response signals in dynamically-scheduled and semi-statically-scheduled signals overlap in different cells, then communication flexibility and resource utilization are improved, but codebook generation complexity and scheduling management difficulty increase
Solution Approach 1:
The patent segments the overlapping slots into a first slot containing a first codebook for dynamically-scheduled signals and a second slot containing a second codebook for semi-statically-scheduled signals. This segmentation allows independent processing and management of different codebook types, reducing the overall complexity while enabling efficient multiplexing across different cells
Solution Approach 2:
The patent resolves the overlap conflict by transitioning to another dimension - multiplexing the first and second codebooks in the frequency domain across different cells. Instead of handling temporal overlap directly, the solution uses spatial (cell) and frequency dimensions to accommodate both codebooks simultaneously, improving resource utilization without increasing processing complexity
2Loss of time
If HARQ-ACK feedback is transmitted for overlapping slots in different cells, then latency is reduced and communication quality is improved, but transmission resource management becomes more complex
Solution Approach 1:
The patent merges the transmission of the first codebook and second codebook into a single multiplexed transmission across different cells. This combining approach enables simultaneous HARQ-ACK feedback for both dynamically and semi-statically scheduled signals, reducing latency while managing transmission resources through unified multiplexing control
Data Source
AI summary
This terminal includes: a control unit that multiplexes a first code book for a response signal of a signal that is included in a first slot and is dynamically scheduled, and a second code book for a response signal of a signal that is included in a second slot and that is semi-dynamically scheduled, the second slot being an uplink cell slot different from the first slot and overlapping with the first slot; and a transmission unit that transmits the first code book and the second code book that have been multiplexed.