Multi-TRP PUSCH Scheduling With SRS Resource Set Selection
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Solution Overview
Problem
The 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), particularly in high-data traffic scenarios, which affect reliability and increase signaling overhead.
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 manage transmission occasions, enabling reliable communication between terminals and multiple TRPs with reduced signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple SRS resource sets and DCI with SRI fields are configured for managing PUSCH transmission between terminal and multiple TRPs, then transmission reliability is improved, but signaling overhead 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 the SRS resource set for a particular PUSCH transmission occasion. This segmentation allows the terminal to reliably transmit to multiple TRPs while the network can selectively configure only the necessary SRS resources, managing signaling overhead.
Solution Approach 2:
The patent employs dynamic indication of SRI fields in DCI messages to select appropriate SRS resource sets for different PUSCH transmission occasions. The network can dynamically adjust which TRPs receive PUSCH transmissions based on channel conditions and traffic requirements, improving reliability without permanently configuring all possible SRS resources, thus balancing reliability with signaling overhead.
2Reliability
If PUSCH is transmitted in multiple transmission occasions to multiple TRPs, then data transmission reliability is enhanced, but device complexity increases
Solution Approach 1:
The patent creates a universal framework where a single DCI message structure with multiple SRI fields can handle transmissions to multiple TRPs. The terminal uses a unified procedure to interpret the DCI, select SRS resources from configured sets, and transmit PUSCH to multiple TRPs, reducing the need for separate specialized mechanisms for each TRP and thereby managing device complexity.
Solution Approach 2:
The network pre-configures multiple SRS resource sets before PUSCH transmission. The terminal stores these configurations and simply needs to select the appropriate resources based on SRI fields in the DCI message, rather than performing complex resource selection algorithms in real-time, thus reducing device complexity while maintaining multi-TRP transmission capability.
3Adaptability or versatility
If multiple SRS resource sets are configured for different TRPs, then adaptability to multi-TRP scenarios is improved, but configuration complexity increases
Solution Approach 1:
The patent segments SRS resources into distinct resource sets, each associated with a specific TRP through configuration parameters. This segmentation provides clear structure for multi-TRP scenarios, making the configuration more manageable and adaptable. Each SRS resource set can be independently configured and activated based on network requirements, improving adaptability while maintaining organizational simplicity.
Solution Approach 2:
The patent introduces SRS resource sets as an intermediary layer between the terminal and multiple TRPs. These resource sets act as pre-prepared configurations that simplify the interaction with multiple TRPs. The network configures these intermediary structures once, and they can be reused across multiple transmission occasions, reducing configuration complexity while maintaining high adaptability to different multi-TRP scenarios.
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.