Uplink Repetition SRI Signaling for Multi-Receiver PUSCH
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Solution Overview
Problem
There is currently no scheme for indicating a sounding reference signal (SRS) resource to be used by a terminal device when transmitting the same physical uplink shared channel (PUSCH) to multiple receivers, which hinders support for uplink repetitions in 5G technology.
Innovation Solution
A method for indicating an SRS resource to be used by the terminal device, including a first indication for the number of transmission layers and a first SRS resource, and optionally a second indication for a second SRS resource, allowing uplink repetitions to multiple receivers and/or beam directions, thereby improving coding rate and resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uplink repetitions are transmitted to multiple receivers, then reliability is improved, but device complexity increases due to lack of SRS resource indication scheme
Solution Approach 1:
The patent introduces SRS resource indicator (SRI) information as an intermediary element that mediates between the terminal device and multiple receivers. The SRI information contains indication information that guides the terminal device on which SRS resource to use for uplink repetitions, thereby resolving the complexity issue while maintaining reliability improvement through multi-receiver transmission
2Adaptability or versatility
If SRS resource indication is added to support multiple receivers, then adaptability is improved, but information loss increases due to additional indication overhead
Solution Approach 1:
The patent segments the SRS resource indication into specific SRI information fields that are separately handled. By dividing the indication mechanism into structured segments (SRI information containing indication information), the system achieves adaptability for multiple receivers while managing information overhead through organized data structure rather than unstructured additions
3Manufacturing precision
If multiple SRS resources are indicated for different transmissions, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple SRS resources and their corresponding indication information before actual uplink transmission. The terminal device receives and stores the SRI information in advance, which then guides the selection of appropriate SRS resources during transmission. This preliminary setup enables precise transmission control without requiring complex real-time decision-making at the terminal device
Data Source
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AI summary
A transmission method, a terminal device, a network device, and a communication system are provided. The method includes the following. A terminal device receives sounding reference signal (SRS) resource indicator (SRI) information, where the SRI information is indicative of an SRS resource to be used by the terminal device for uplink repetitions. The SRI information includes a first indication and/or at least one second indication, where the first indication indicates the number of transmission layers and a first SRS resource to be used by the terminal device for a first transmission in the uplink repetitions, and the second indication indicates a second SRS resource to be used by the terminal device for a second transmission in the uplink repetitions. A receiver and/or a beam direction for the first transmission is different from a receiver and/or a beam direction for the second transmission.