Multi-PUSCH PDSCH Scheduling via Single DCI Grouping
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in efficiently scheduling physical uplink shared channels (PUSCH) and physical downlink shared channels (PDSCH) due to limitations in existing multiple-access technologies, which affect resource utilization and power consumption.
Innovation Solution
The proposed solution involves a method where user equipment (UE) and base stations exchange indications of transmission schedules for multiple PUSCHs or PDSCHs, including a time gap, using downlink control information (DCI) to optimize scheduling, reducing channel access overhead and power consumption by enabling multi-PUSCH and multi-PDSCH scheduling with time domain resource allocation tables and interleaving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple individual PUSCH/PDSCH transmissions are scheduled separately, then channel access control and resource allocation are simplified, but DCI overhead and power consumption increase
Solution Approach 1:
The patent combines multiple individual PUSCH/PDSCH transmissions into a single group that is scheduled by one DCI message. This merging approach reduces the number of DCI messages required, thereby reducing DCI overhead and power consumption while maintaining simplified scheduling control. The base station groups multiple channel transmissions and assigns a single DCI to control the entire group, eliminating the need for separate DCI messages for each individual transmission.
Solution Approach 2:
The patent creates a universal DCI structure that can schedule multiple PUSCH/PDSCH transmissions simultaneously. This multi-functional DCI message serves the role of multiple individual DCI messages, enabling a single control signal to manage multiple channel allocations. The universal DCI format includes fields that can represent multiple time-domain resource allocations, making it applicable to various scheduling scenarios without requiring separate specialized DCI messages for each transmission.
2Adaptability or versatility
If multiple individual PUSCH/PDSCH transmissions are scheduled separately, then resource allocation flexibility is maintained, but resource utilization efficiency decreases
Solution Approach 1:
The patent merges multiple resource allocations into a single DCI-managed group, allowing the system to allocate multiple PUSCH/PDSCH resources simultaneously through one control message. This combining approach improves resource utilization efficiency by reducing the overhead associated with multiple separate allocations while maintaining the ability to flexibly assign different time-domain resources within the group. The base station can efficiently manage multiple resources in parallel without the proportional increase in control overhead that would otherwise occur.
Solution Approach 2:
The patent introduces a new dimension of grouping in the scheduling structure, where multiple PUSCH/PDSCH transmissions are organized into cohorts that share a common DCI. This dimensional reorganization allows the system to maintain resource allocation flexibility at the group level while improving overall resource utilization efficiency. The time-domain resource allocation fields in the DCI can specify multiple different time slots and durations, providing flexibility without requiring separate DCI messages for each transmission.
3Loss of time
If time gap is reduced for frequent transmissions, then latency is decreased, but channel access overhead and power consumption increase
Solution Approach 1:
The patent combines multiple frequent transmissions into a single DCI-scheduled group, allowing reduced time gaps between transmissions without proportionally increasing power consumption. By grouping multiple PUSCH/PDSCH transmissions under one DCI, the system can maintain short intervals between consecutive transmissions (low latency) while avoiding the need to repeatedly activate power-intensive DCI processing for each individual transmission. The single DCI remains valid across the group, reducing the cumulative power overhead.
Solution Approach 2:
The patent enables continuous transmission sequences within a DCI group with minimal gaps, maintaining high utilization of the communication channel. The time domain resource allocation fields allow specifications of consecutive or near-consecutive time slots, ensuring continuous useful action (data transmission) with reduced idle time. This continuity approach minimizes latency while the grouping mechanism ensures that power consumption does not scale linearly with the number of transmissions, as the DCI overhead is amortized across the entire group.
Data Source
AI summary
The present disclosure relates to methods and devices for wireless communication of an apparatus, e.g., a UE and/or a base station. The apparatus may receive, from a base station, an indication of a plurality of transmission schedules for at least one of a plurality of PUSCHs or a plurality of PDSCHs, the indication including a time gap prior to a transmission of each of the plurality of PUSCHs or each of the plurality of PDSCHs. The apparatus may also receive, from the base station, DCI identifying at least one transmission schedule for at least one PUSCH of the plurality of PUSCHs or at least one PDSCH of the plurality of PDSCHs. Further, the apparatus may transmit, to the base station, the at least one PUSCH or receive, from the base station, the at least one PDSCH based on the at least one transmission schedule in the received DCI.