Reference Signal Indication Method Reducing Signaling Overhead
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Solution Overview
Problem
In 5G mobile communication systems, the dynamic and frequent changes in reference signal patterns lead to significant signaling indication overheads, resulting in lower service transmission rates due to the need for frequent indication of Demodulation Reference Signal (DMRS) patterns through high-layer RRC and physical-layer DCI information.
Innovation Solution
Implementing a method where the network device does not transmit reference signal indication information when using a default or unchanged DMRS pattern, reducing transmission times and bit overhead by configuring a target reference signal pattern for later transmission occasions and only transmitting indication information when the pattern changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the reference signal pattern is changed dynamically and frequently to meet different service requirements, then the system adaptability is improved, but the signaling indication overhead increases significantly
Solution Approach 1:
The patent implements dynamic reference signal pattern indication where the network device can flexibly select and indicate different DMRS patterns (first pattern or second pattern) based on current transmission requirements. This allows the system to adapt to different services and channel conditions while only transmitting indication information when pattern changes are needed, thus maintaining adaptability while reducing overhead.
2Measurement precision
If the reference signal indication information is transmitted frequently to indicate pattern changes, then the reference signal pattern indication accuracy is improved, but the service transmission rate decreases
Solution Approach 1:
The patent employs periodic or event-driven indication transmission where reference signal pattern indication information is transmitted only when the pattern actually changes. The network device determines whether to transmit indication information based on comparison between current and previous patterns, avoiding redundant transmissions during unchanged periods and thus preserving service transmission rate while maintaining indication accuracy when needed.
3Adaptability or versatility
If the DMRS pattern is made flexible to support multiple functions, then the system versatility is improved, but the device complexity increases
Solution Approach 1:
The patent utilizes parameter changes in the indication information to convey different DMRS pattern selections. By modifying specific parameters within the indication message (such as pattern type indicators), the system can support multiple DMRS patterns and functions without requiring fundamentally different indication mechanisms, thus managing complexity while maintaining versatility.
Data Source
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AI summary
A reference signal indication method, a network device and a terminal device are provided. The method includes: configuring a target reference signal pattern to be used for a terminal device in later transmission occasions, wherein the target reference signal pattern is a reference signal pattern selected from multiple predefined reference signal patterns; and not transmitting reference signal indication information to the terminal device, in a case that the target reference signal pattern is a default reference signal pattern; or not transmitting the reference signal indication information to the terminal device, in a case that the target reference signal pattern is the same as a reference signal pattern indicated by a previous piece of reference signal indication information.