Discovery Reference Signal Composition Indication in NR-U
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Solution Overview
Problem
In new radio unlicensed spectrum (NR-U) communications, existing technologies face inefficiencies in channel discovery and resource utilization due to inaccurate indication of discovery reference signal (DRS) composition, leading to frequent channel discovery and low resource utilization efficiency.
Innovation Solution
The method involves carrying configuration information in the discovery reference signal, specifically using the common signal block or channel state information-reference signal (CSI-RS) to indicate the inclusion or type of additional signals, such as remaining minimum system information (RMSI), other system information (OSI), and paging messages, to accurately compose the DRS and reduce channel discovery frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the network device aggregates as many signals as possible into the DRS for transmission, then the channel access delay is reduced, but the indication accuracy of DRS composition becomes insufficient, causing frequent channel discovery
Solution Approach 1:
The patent embeds configuration information indicating DRS composition within the DRS itself through nested structures. The common signal block or CSI-RS contains embedded indicators that specify whether RMSI, OSI, or paging messages are present in the aggregated DRS transmission, enabling accurate indication without separate signaling
Solution Approach 2:
The patent introduces configuration information as an intermediary element that mediates between the aggregated signal components and the terminal device. This intermediary carries indication data about DRS composition, allowing the terminal to correctly interpret the aggregated signals without requiring frequent channel re-discovery
2Device complexity
If the network device uses semi-static signaling to indicate DRS composition, then the device complexity is reduced, but the resource utilization efficiency of DRS becomes low due to frequent channel discovery
Solution Approach 1:
The patent transitions from static semi-static signaling to dynamic indication by embedding composition information directly in the DRS transmission. The configuration information can change with each DRS transmission, allowing the network to adapt to varying channel conditions and signal aggregation needs, thereby improving resource utilization efficiency
Solution Approach 2:
The patent merges the DRS transmission with configuration information indication into a single integrated transmission. The configuration information is combined with the common signal block or CSI-RS, eliminating the need for separate signaling messages and reducing overall signaling overhead while improving efficiency
Data Source
AI summary
A communication method and a communications apparatus are disclosed. The method includes: receiving a discovery reference signal from a network device, where the discovery reference signal includes one or more first signals and one or more second signals, and the one or more first signals include at least a common signal block or a channel state information-reference signal (CSI-RS). The one or more first signals may be used to carry configuration information of the one or more second signals, or configuration information of the discovery reference signal may be received from the network device. The corresponding apparatus is also disclosed. By virtue of the disclosed communication method and apparatus, composition of the discovery reference signal can be accurately indicated, to avoid frequent channel discovery, and improve resource utilization efficiency of the discovery reference signal.