Uplink Reference Signal Merging on Single Antenna Port
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Solution Overview
Problem
Current wireless communication systems face limitations in improving communication flexibility and efficiency, particularly in the design of procedures for efficient uplink transmissions in 5G communication systems.
Innovation Solution
The implementation of user equipment (UE) and base stations that utilize multiple reference signals (RSs) associated with Transmission Reception Points (TRPs) on a UL antenna port, with these RSs defined by a common sequence or different sequences based on parameters configured by higher layers, allowing for efficient control and scheduling of uplink transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple reference signals are transmitted on a single antenna port, then uplink transmission flexibility and efficiency are improved, but device complexity increases
Solution Approach 1:
The patent combines multiple reference signals (DM-RS and SRS) onto a single uplink antenna port, allowing the UE to transmit multiple RSs with different beam indices through one port. This merging approach enables flexible beam management and uplink transmission without requiring separate antenna ports for each reference signal, thus improving adaptability while controlling device complexity.
Solution Approach 2:
The single uplink antenna port is designed to serve multiple functions by transmitting different types of reference signals (DM-RS for demodulation, SRS for channel sounding) with different beam indices. This multi-functionality allows the system to achieve diverse uplink transmission scenarios and beam management capabilities through a unified port structure.
2Measurement precision
If multiple reference signals with different sequences are used, then measurement precision is improved, but loss of information increases
Solution Approach 1:
The patent applies different sequence configurations (common sequence or different sequences) to different reference signals based on their specific purposes. DM-RS may use a common sequence optimized for demodulation, while SRS can use different sequences optimized for channel sounding. This local quality differentiation improves measurement precision for each specific function while managing overall information overhead.
Solution Approach 2:
The system dynamically changes sequence parameters (sequence initialization, cyclic shifts) for different reference signals based on higher layer configurations and transmission requirements. This parameter flexibility allows precise channel measurement through differentiated sequences while efficiently managing the information overhead through configurable parameters rather than fixed structures.
Data Source
AI summary
A user equipment (UE) is described. The UE includes a higher layer processor configured to acquire a first dedicated radio resource control (RRC) configuration and a second dedicated RRC configuration. The first dedicated RRC configuration specifies a configuration of a first physical downlink control channel (PDCCH) which indicates a slot format. The second dedicated RRC configuration specifies a configuration of repetition of a physical uplink shared channel (PUSCH). The UE also includes PDCCH receiving circuitry configured to monitor the first PDCCH. The UE further includes PUSCH transmitting circuitry configured to transmit the PUSCH with the repetition. In a case that the first PDCCH indicates that a symbol for the PUSCH in a slot is other than either downlink or uplink, the PUSCH is not transmitted in the slot and the PUSCH in the slot is counted as one of the repetition.