Configured Grant HARQ Scheduling for Multiple PUSCH Transmissions
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Solution Overview
Problem
Existing wireless communication systems face challenges in specifying periodic grants for multiple uplink/downlink transmissions, particularly in the higher frequency range above 52.6 GHz, where higher subcarrier spacings and shorter slot lengths complicate scheduling operations.
Innovation Solution
The proposed solution involves a processor in user equipment (UE) and base stations that manage semi-persistent scheduling (SPS) and configured grant (CG) configurations for multiple physical downlink shared channel (PDSCH) and physical uplink shared channel (PUSCH) transmissions. These configurations include parameters for the number of hybrid automatic repeat request (HARQ) processes, allowing the UE to determine the maximum number of transmissions within a single period and validate downlink control information (DCI) for resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple UL/DL transmissions are scheduled in a single period of configured grant, then productivity is improved, but device complexity increases
Solution Approach 1:
The patent segments the scheduling period into multiple transmission opportunities, allowing multiple UL/DL transmissions within a single configured grant period. Each transmission is associated with specific time domain resources and HARQ process identifiers, enabling the system to handle multiple transmissions systematically without overwhelming complexity.
Solution Approach 2:
The patent introduces dynamic validation mechanisms where the UE validates DCI transmissions to determine time domain resources for each transmission. This dynamic approach allows the system to adapt to different scheduling conditions while maintaining manageable complexity through standardized validation procedures.
2Speed
If higher subcarrier spacings are used, then speed is improved, but device complexity increases
Solution Approach 1:
The patent accommodates higher subcarrier spacings by modifying the configured grant parameters to include multiple time domain resources within a single period. This parameter adjustment allows the system to support higher data rates while managing the increased scheduling complexity through structured resource allocation and validation mechanisms.
3Productivity
If multiple PDSCH transmissions are transmitted within a single SPS period, then productivity is improved, but reliability decreases
Solution Approach 1:
The patent segments the SPS period into multiple transmission slots, each with its own HARQ process identifier. This segmentation allows independent error handling for each transmission, maintaining reliability while enabling multiple transmissions within a single period to improve throughput.
Solution Approach 2:
The patent implements HARQ feedback mechanisms for each PDSCH transmission within the SPS period. The UE validates DCI transmissions and tracks HARQ process states, enabling reliable error correction and retransmission management for multiple transmissions without compromising overall reliability.
Data Source
AI summary
A user equipment (UE) is configured to receive from a base station a semi-persistent scheduling (SPS) configuration for physical downlink shared channel (PDSCH) transmissions wherein multiple PDSCHs are transmitted within a single period of the SPS, the SPS configuration including a parameter for a number of hybrid automatic repeat request (HARQ) processes associated with the SPS configuration, receive from the base station a downlink control information (DCI) transmission for activating the SPS configuration, the DCI including a HARQ process ID for one of the PDSCH transmissions in the SPS configuration, wherein the UE determines a maximum number of PDSCH transmissions allowed within the single period based on the parameter for the number of HARQ processes associated with the SPS configuration, validate the DCI to determine time domain resources to use for the PDSCH transmission and receive from the base station the multiple PDSCH transmissions within the single SPS period.