Uplink DMRS Configuration for Multi-Waveform Resource Multiplexing
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Solution Overview
Problem
Current methods for transmitting uplink demodulation reference signals in communication systems, such as 5G, cannot simultaneously support multiple DMRS sequence types and resource multiplexing between terminal devices using different or the same uplink waveforms, leading to inefficient resource utilization.
Innovation Solution
A method and device that enable a terminal device to receive and transmit uplink demodulation reference signals by determining configuration parameters based on received DMRS configuration information, allowing it to support multiple DMRS sequence types and resource multiplexing between terminal devices using different or the same uplink waveforms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sequence-based orthogonal transmission is supported in multiplexing scenarios with different waveforms, then resource multiplexing capability is improved, but terminal device complexity increases due to needing to support various sequence types simultaneously
Solution Approach 1:
The patent applies dynamics by making the DMRS sequence type adaptable and configurable rather than fixed. The terminal device can dynamically select and support multiple DMRS sequence types (e.g., Zadoff-Chu sequences, pseudo-random sequences) based on configuration from the network, allowing the system to adapt to different waveform requirements without permanently supporting all sequence types simultaneously, thus reducing device complexity while maintaining versatility.
Solution Approach 2:
The patent changes the parameter of DMRS sequence type from a fixed value to a configurable parameter. By receiving configuration information from the network that indicates which DMRS sequence type to use, the terminal device can adjust its behavior to match the required waveform (CP-OFDM or DFT-S-OFDM) without having to permanently support all sequence types, resolving the contradiction between adaptability and device complexity.
2Adaptability or versatility
If multiple DMRS sequence types are supported simultaneously, then waveform multiplexing flexibility is improved, but configuration management complexity increases
Solution Approach 1:
The patent introduces configuration information from the network as an intermediary that mediates between the terminal device and multiple DMRS sequence types. Instead of the terminal device managing multiple sequence types directly, the network provides configuration indications that tell the terminal which sequence type to use for each transmission, simplifying configuration management while maintaining waveform multiplexing flexibility.
Data Source
AI summary
A method for transmitting uplink demodulation reference signal (DMRS) includes: receiving, by a terminal device, first DMRS configuration information sent by a network device, the first DMRS configuration information indicating a type of a DMRS sequence; receiving, by the terminal device, second DMRS configuration information sent by the network device, the second DMRS configuration information indicating at least one configuration parameter of: an antenna port configuration of DMRS, a physical resource configuration of DMRS, or a sequence configuration of DMRS; determining, by the terminal device, a configuration parameter indicated by the second DMRS configuration information according to the first DMRS configuration information; determining, by the terminal device, a transmission parameter of DMRS according to the configuration parameter indicated by the second DMRS configuration information; and transmitting, by the terminal device, DMRS to the network device according to the transmission parameter.