Single-DCI SDM PUSCH Scheduling with Unified SRS Resource Set
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently supporting simultaneous transmission of multiple physical uplink shared channels (PUSCHs) using multiple UE panels, particularly in 5G NR systems, due to limitations in SRS resource configurations and scheduling mechanisms.
Innovation Solution
The implementation of an exclusive SRS resource set configured for codebook-based or non-codebook-based simultaneous PUSCH transmissions, utilizing various mapping strategies and signaling methods to facilitate simultaneous PUSCH transmissions across multiple UE panels, including beamforming, power control, and precoding matrix indications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple SRS resource sets are configured for simultaneous PUSCH transmissions, then the capability for simultaneous PUSCH transmissions is improved, but the device complexity and signaling overhead increase
Solution Approach 1:
The patent combines multiple SRS resource sets into a single unified SRS resource set that can support both codebook-based and non-codebook-based simultaneous PUSCH transmissions. This merging approach maintains the capability for simultaneous transmissions while reducing the complexity of managing multiple separate resource sets and their associated signaling overhead.
Solution Approach 2:
The patent creates a universal SRS resource set structure that can serve multiple functions - supporting both codebook-based and non-codebook-based PUSCH transmissions, as well as accommodating multiple UE panels. This multi-functional design eliminates the need for separate dedicated resource sets for different transmission modes, thereby reducing overall system complexity.
2Productivity
If multiple UE panels are used for simultaneous PUSCH transmissions, then the peak data rates and number of layers are increased, but the scheduling mechanism complexity increases
Solution Approach 1:
The patent segments the single SRS resource set into multiple SRS resource groups, where each group can be associated with a specific UE panel or transmission mode. This segmentation allows the scheduling mechanism to efficiently manage multiple panels by working with organized groups rather than individual resources, reducing scheduling complexity while maintaining high data rates.
Solution Approach 2:
The patent introduces a new organizational dimension by creating SRS resource groups and associations with UE panels, transforming the management approach from individual resource handling to group-based panel association. This dimensional change simplifies the scheduling mechanism by providing a structured hierarchy that naturally accommodates multiple panels without increasing complexity.
Data Source
AI summary
Systems and methods for single downlink control information (DCI) based simultaneous physical uplink shared channel (PUSCH) transmission with spatial division multiplexing (SDM) using a sounding reference signal (SRS) resource set are disclosed herein. The SRS resource set may be an exclusive (e.g., single) SRS resource set for either a non-codebook-based or a codebook-based simultaneous physical uplink shared channel (PUSCH) operation. In each case, a user equipment (UE) transmits the SRS resource(s) of the SRS resource set, receives a DCI from the network that schedules a first PUSCH transmission on a first UE panel and a simultaneous second PUSCH transmission on a second UE panel, and then transmits the (simultaneous) PUSCH transmissions as scheduled. Related network-side functionality is also discussed. In cases, SRS resources (and/or one or more SRS ports used by the SRS resource) are mapped to a particular UE panel. In other cases, SRS resources use both UE panels.