Deferred SPS HARQ-ACK Joint Coding on PUCCH
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Solution Overview
Problem
Existing wireless communication systems face limitations in communication flexibility and efficiency, particularly in handling Semi-Persistent Scheduling (SPS) Hybrid Automatic Repeat Request-Acknowledgement (HARQ-ACK) transmissions, which can lead to inefficiencies and dropped packets.
Innovation Solution
Implementing joint coding and multiplexing techniques for deferred SPS HARQ-ACK on the Physical Uplink Control Channel (PUCCH), allowing for deferred HARQ-ACK transmissions to be combined with normal HARQ-ACK, using a single joint HARQ-ACK codebook and optimizing resource allocation based on payload size and priority.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If separate coding and multiplexing of deferred SPS HARQ-ACK and normal HARQ-ACK are used, then the handling of different HARQ-ACK types is straightforward, but the communication efficiency and capacity are limited
Solution Approach 1:
The patent merges deferred SPS HARQ-ACK and normal HARQ-ACK into a single joint codebook, combining previously separate handling mechanisms into one unified structure. This merging enables more efficient use of PUCCH resources and improves communication capacity by eliminating the need for separate coding and multiplexing processes for different HARQ-ACK types.
2Productivity
If joint coding and multiplexing of deferred SPS HARQ-ACK and normal HARQ-ACK are implemented, then communication capacity and speed are improved, but the complexity of determining PUCCH resources and coding increases
Solution Approach 1:
The patent changes the parameter structure by introducing a unified joint codebook that consolidates multiple HARQ-ACK bits into a single payload. This parameter change simplifies the overall system by reducing the number of separate resource determination processes, even though the internal coding within the joint codebook becomes more sophisticated. The net effect is improved communication capacity with manageable complexity.
3Adaptability or versatility
If deferred HARQ-ACK transmission is supported, then flexibility in handling unavailable slots is improved, but the complexity of managing deferred and non-deferred HARQ-ACK increases
Solution Approach 1:
The patent introduces dynamic HARQ-ACK deferral capability that allows the system to adaptively adjust acknowledgment timing based on slot availability. The joint codebook structure dynamically accommodates both deferred and non-deferred HARQ-ACK bits, enabling flexible response to changing channel conditions and resource availability while maintaining manageable complexity through unified handling.
Data Source
AI summary
A user equipment (UE) is described. The UE includes receiving circuitry configured to receive a first radio resource control (RRC) message comprising first information used for configuring a Semi-Persistent Scheduling (SPS) physical downlink shared channel (PDSCH) configuration, to receive a second RRC message comprising second information used for configuring that deferring of SPS hybrid automatic repeat request-acknowledgement (HARQ-ACK) is supported, and to receive, based on a detection of a physical downlink control channel (PDCCH) carrying a downlink control information (DCI) format with cyclic redundancy check (CRC)scrambled by a first radio network identifier (RNTI) for an activation of the SPS PDSCH, the SPS PDSCH transmission. The UE also includes transmitting circuitry configured to transmit HARQ-ACK information based on a decoding of the SPS PDSCH transmission in a first slot/sub-slot and to defer the HARQ-ACK information transmission in a second slot/sub-slot if the first slot/sub-slot is not available.