HARQ-ACK Codebook Generation for Dynamic 5G Slot Signaling
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently generating HARQ-ACK codebooks, which are crucial for data transmission efficiency and resource management in 5G networks.
Innovation Solution
A method for generating a dynamic or semi-static HARQ-ACK codebook in a wireless communication system, where the number of bits and bit locations are determined based on information signaled by the physical downlink control channel (PDCCH), with specific rules for determining the last PDCCH in case of ambiguity, and handling semi-persistent scheduling (SPS) PDSCH releases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic TDD is used to vary the number of OFDM symbols according to data traffic directions, then spectral efficiency is improved, but the complexity of slot configuration management increases
Solution Approach 1:
The patent implements dynamic TDD by allowing the base station to vary the number of downlink and uplink OFDM symbols in each slot according to real-time data traffic conditions. The slot configuration is no longer static but dynamically adjusted through DCI signaling, enabling the system to adapt to changing traffic patterns and improve spectral efficiency while managing complexity through standardized dynamic signaling procedures.
2Productivity
If the number of HARQ-ACK bits is dynamically determined based on PDCCH information, then resource utilization is improved, but the complexity of codebook generation increases
Solution Approach 1:
The patent employs preliminary action by having the base station pre-configure the terminal with codebook generation rules and parameters through higher-layer signaling before actual HARQ-ACK transmission. The terminal uses these pre-configured rules to dynamically determine the number of HARQ-ACK bits and their bit locations based on PDCCH information, eliminating the need for complex real-time negotiations and reducing generation complexity while improving resource utilization.
3Length of stationary object
If beamforming and massive MIMO technologies are deployed to alleviate path loss, then transmission distance is improved, but the complexity of signal processing increases
Solution Approach 1:
The patent combines beamforming and massive MIMO technologies to achieve both path loss mitigation and extended transmission distance. By merging spatial filtering (beamforming) with multiple antenna elements (massive MIMO), the system achieves coherent signal combining that extends transmission distance while the standardized signal processing procedures and resource allocation mechanisms keep the overall system complexity manageable through efficient resource utilization.
Data Source
AI summary
Disclosed is a base station in a wireless communication system. Each base station in wireless communication comprises: a communication module; and a processor. The processor generates a hybrid automatic repeat request (HARQ)-ACK codebook comprising one or more bits and indicating whether or not reception of a channel or signal is successful, and transmits the HARQ-ACK codebook to the base station.