PUSCH Transmission Across Multiple TRPs with SRS Resource Set Mapping
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently transmitting and receiving physical uplink shared channels (PUSCH) and sounding reference signals (SRS) between terminals and multiple transmit-receive points (TRPs), leading to resource shortages and increased latency.
Innovation Solution
A method and apparatus for transmitting and receiving PUSCHs and SRSs involve configuring multiple SRS resource sets and using downlink control information (DCI) with SRS resource indicators (SRIs) to schedule PUSCH transmissions across multiple TRPs, optimizing data transmission and reducing signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple SRS resource sets and DCI with SRI fields are used to schedule PUSCH transmissions across multiple TRPs, then data transmission reliability is improved, but device complexity increases
Solution Approach 1:
The patent segments the SRS resources into multiple resource sets, where each set is associated with a specific TRP. The DCI message is segmented to include multiple SRI fields, with each field indicating an SRS resource from a specific set. This segmentation allows the terminal to independently manage and transmit PUSCH to different TRPs using different SRS resources, thereby improving transmission reliability through diversity while maintaining manageable complexity through structured organization.
Solution Approach 2:
The patent introduces an additional dimension by configuring multiple SRS resource sets rather than using a single set. This multi-dimensional approach allows the system to select SRS resources from different sets corresponding to different TRPs, creating a multi-dimensional transmission space that enhances reliability. The DCI message structure is extended to include multiple SRI fields to match this dimensional expansion.
2Productivity
If multiple SRS resource sets are configured for PUSCH transmission to multiple TRPs, then communication efficiency is improved, but signaling overhead increases
Solution Approach 1:
The patent makes the DCI message structure universal by designing it to accommodate multiple SRI fields that can reference SRS resources from multiple different sets. This multi-functional DCI structure can dynamically indicate SRS resources from any configured set, allowing the system to adapt to different transmission scenarios (single TRP or multiple TRPs) without requiring separate signaling mechanisms, thereby improving communication efficiency while controlling signaling overhead through a unified approach.
Data Source
AI summary
Disclosed are a method and a device for transmitting or receiving a PUSCH in a wireless communication system. A method for transmitting a physical uplink shared channel (PUSCH) according to an embodiment of the present disclosure may comprise the steps of: receiving first configuration information related to a sounding reference signal (SRS) from a base station; receiving downlink control information (DCI) for PUSCH scheduling from the base station; and transmitting the PUSCH to the base station. On the basis that the first configuration information includes information relating to multiple SRS resource sets, the PUSCH is transmitted at N (N is a natural number) transmission occasions (TOs), and the DCI includes multiple SRS resource indicator (SRI) fields, the PUSCH may be transmitted at each of the TOs on the basis of an SRS resource in an SRS resource set identified by one SRI field among the multiple SRI fields related to each of the TOs.