Reference Signal Transmission Switching in NR Systems
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Solution Overview
Problem
Current transmission efficiency in Next-Generation Radio (NR) systems is not sufficiently improved by existing technologies, as they often require unnecessary transmission of reference signals, which can be omitted in certain conditions.
Innovation Solution
A communication system that switches the transmission of reference signals based on condition determination, allowing for zero power transmission and improved frequency efficiency by omitting reference signals when not necessary for decoding, using a mechanism where the first communication device determines whether to transmit a reference signal and the second communication device performs equalization based on previously acquired channel information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reference signals are transmitted in all conditions to ensure reliable channel estimation, then decoding reliability is improved, but transmission efficiency and power consumption deteriorate due to unnecessary transmissions
Solution Approach 1:
The patent applies dynamics by making the reference signal transmission status adjustable and switchable based on channel conditions. The system dynamically determines whether to transmit reference signals by evaluating channel variation characteristics, allowing the transmission behavior to adapt to changing conditions rather than following a fixed pattern. This resolves the contradiction by enabling reliable decoding when needed while improving transmission efficiency when channel conditions permit.
Solution Approach 2:
The patent changes the parameter of reference signal transmission status between two states: transmission and non-transmission. By switching this parameter based on channel variation determination, the system achieves both reliability (when transmission occurs) and efficiency (when transmission is omitted). The channel variation characteristics serve as the basis for changing this critical parameter.
2Measurement precision
If reference signals are transmitted continuously to maintain accurate channel information, then channel estimation accuracy is improved, but power consumption increases due to continuous transmissions
Solution Approach 1:
The patent implements periodic action by transmitting reference signals only at specific intervals rather than continuously. The system determines channel variation characteristics and transmits reference signals periodically based on these characteristics, omitting transmissions when channel conditions remain stable. This approach maintains channel estimation accuracy when needed while significantly reducing power consumption during stable periods.
Solution Approach 2:
The system performs self-service by using previously acquired channel information to determine whether new reference signal transmissions are necessary. The communication device evaluates channel variation characteristics using existing channel information and makes autonomous decisions about transmission timing, eliminating the need for continuous external reference signals while maintaining estimation accuracy.
3Adaptability or versatility
If reference signals are transmitted in every time slot to handle channel variations, then adaptability to channel changes is improved, but frequency efficiency deteriorates due to wasted transmission resources
Solution Approach 1:
The patent applies dynamics by making reference signal transmission adaptive to actual channel conditions rather than following a static schedule. The system dynamically evaluates channel variation characteristics in each time slot and adjusts transmission decisions accordingly, transmitting only when channel changes warrant it. This maintains adaptability to channel changes while avoiding waste of frequency resources during stable periods.
Solution Approach 2:
The patent applies local quality by treating different time slots differently based on their specific channel conditions. Instead of uniform transmission across all slots, the system evaluates and applies different transmission decisions to each time slot based on local channel variation characteristics. This ensures adaptability where needed while preserving frequency efficiency where conditions permit.
Data Source
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AI summary
A communication device includes a control unit that switches whether or not to transmit a first reference signal using a scheduled resource scheduled to be used to transmit a reference signal.