DMRS Sharing in Repeated Wireless Transmission to Cut Overhead
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Solution Overview
Problem
In existing wireless communication systems, the use of different DMRS for each actual repetition during nominal repetition segmentation leads to excessive resource and power consumption, reducing the available resources for data transmission.
Innovation Solution
A method where DMRS is shared among actual repetitions based on a trigger condition, such as channel quality or frequency hopping status, to optimize resource allocation and improve channel coverage and code rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a different DMRS is used for each actual repetition, then reliable demodulation is ensured, but resource consumption and power consumption become excessive
Solution Approach 1:
The patent merges the DMRS resources across multiple actual repetitions by determining that repetitions share a common DMRS based on trigger conditions. This combining approach reduces the total number of DMRS instances from one per repetition to a shared set, directly reducing power consumption and resource usage while maintaining demodulation capability through the shared reference signal.
2Measurement precision
If a different DMRS is used for each actual repetition, then accurate channel estimation is achieved, but available resources for data transmission are reduced
Solution Approach 1:
The patent combines DMRS resources across multiple repetitions by establishing sharing relationships based on trigger conditions. This merging reduces the quantity of reference signals from individual instances per repetition to a shared set, thereby increasing available resources for data transmission while preserving channel estimation accuracy through the shared DMRS structure.
3Productivity
If DMRS sharing is implemented without conditions, then resource efficiency is maximized, but demodulation reliability may be compromised under poor channel conditions
Solution Approach 1:
The patent introduces dynamic trigger conditions that adaptively control DMRS sharing based on channel quality indicators, signal-to-noise ratios, and frequency hopping status. This dynamic mechanism allows the system to switch between sharing and non-sharing modes according to real-time channel conditions, maximizing resource efficiency when conditions permit while ensuring demodulation reliability when conditions deteriorate.
Solution Approach 2:
The patent implements feedback-based trigger conditions that monitor channel quality, SNR, and frequency hopping status to determine whether DMRS sharing should be activated. This feedback mechanism ensures that resource efficiency is optimized under good conditions while automatically protecting demodulation reliability when channel conditions indicate potential problems.
Data Source
AI summary
A data transmission apparatus, a data transmission device, and a storage medium implement a method belonging in the technical field of wireless communications, where the method comprises: on the basis of a trigger condition, determining to perform demodulation reference signal (DMRS) sharing during a data transmission process. Thus, on the basis of signal state information received within a continuous period of time, it is determined whether to start a mechanism for terminating data retransmission. Thus, by means of the data transmission method, during a data transmission process, on the basis of a pre-set trigger condition, a plurality of actual repetitions are triggered at an appropriate time to share DMRSs, such that the DMRS overhead is reduced, and more channel resources and transmission power are distributed for data transmission, thereby improving the encoding rate and the coverage of channels.