Spatial Multiplexing SRS and PUSCH Antenna Port Segmentation
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Solution Overview
Problem
Current wireless communication technologies face challenges in simultaneously transmitting a sounding reference signal (SRS) and a physical uplink shared channel (PUSCH) without collision, leading to dropped transmissions and limitations in low latency and grant-free transmissions, especially in contexts requiring simultaneous uplink communications.
Innovation Solution
The implementation of spatial multiplexing techniques allows for the simultaneous transmission of SRS and PUSCH using different antenna ports or physical antennas, enabling the UE to configure and signal its capability for spatial multiplexing, thereby reducing dropped transmissions and facilitating antenna switching for improved channel throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spatial multiplexing of SRS and PUSCH is implemented using different antenna ports, then transmission reliability is improved, but device complexity increases
Solution Approach 1:
The patent segments the uplink transmission by separating SRS and PUSCH onto different antenna ports. The UE transmits SRS on one antenna port while simultaneously transmitting PUSCH on another antenna port, avoiding collision and improving transmission reliability through spatial diversity.
Solution Approach 2:
The patent introduces a spatial dimension (different antenna ports) to resolve the time-frequency resource collision between SRS and PUSCH. By moving the separation from temporal/frequency domain to spatial domain, both signals can transmit simultaneously without interference.
2Productivity
If simultaneous SRS and PUSCH transmission is enabled, then productivity is improved, but loss of information increases due to potential collisions
Solution Approach 1:
The patent segments the transmission resources by assigning different antenna ports to SRS and PUSCH. This segmentation allows both signals to occupy the same time-frequency resources without collision, eliminating dropped transmissions and improving overall transmission efficiency.
Solution Approach 2:
The patent uses antenna port as an intermediary dimension to mediate the resource allocation between SRS and PUSCH. By introducing this additional degree of freedom, the system can accommodate simultaneous transmissions that would otherwise collide in the time-frequency domain.
3Adaptability or versatility
If antenna switching is implemented for PUSCH, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic antenna switching for PUSCH transmissions. The UE can switch between different antenna ports for PUSCH based on channel conditions, SRS transmission requirements, and network configuration, providing adaptability while managing complexity through standardized procedures.
Data Source
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AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration that indicates whether the UE is to spatially multiplex multiple uplink transmissions, wherein the multiple uplink transmissions are a sounding reference signal (SRS) and a physical uplink shared channel (PUSCH) communication. In some aspects, the user equipment may configure the multiple uplink transmissions based at least in part on the configuration. Numerous other aspects are provided.