RSSI Measurement Configuration for 5G NR Terminals
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Solution Overview
Problem
Current RSSI measurement methods in NR communications systems are complex and power-intensive, particularly when the synchronization signal block sending period is small, leading to high complexity and power overheads.
Innovation Solution
A method where a network device sends a synchronization signal block and an RSSI measurement configuration message indicating a time resource for measurement, which includes specific downlink symbols, allowing a terminal device to measure received signal power using a transmit beam for each synchronization signal block, thereby reducing complexity and power overheads while maintaining precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the terminal device measures all symbols in the 5 millisecond time window including the synchronization signal burst set, then the RSSI measurement precision is improved, but the measurement complexity and power overheads increase
Solution Approach 1:
The patent segments the measurement time window into specific downlink symbols within a timeslot, rather than measuring all symbols in the 5 millisecond window. The network device indicates specific downlink symbols for RSSI measurement through measurement configuration information, dividing the measurement task into targeted symbol-level measurements that reduce overall complexity while maintaining precision
Solution Approach 2:
The patent applies partial action by measuring only the necessary downlink symbols that contain synchronization signal blocks or other relevant signals, rather than measuring all symbols in the time window. This partial measurement approach is sufficient for obtaining accurate RSSI values while significantly reducing measurement complexity and power consumption
2Measurement precision
If the terminal device measures all symbols in the 5 millisecond time window including the synchronization signal burst set, then the RSSI measurement precision is improved, but the power overheads increase
Solution Approach 1:
The measurement process is segmented to focus only on specific downlink symbols indicated by the network device, rather than continuously measuring all symbols in the 5 millisecond window. This segmentation reduces the total measurement duration and power consumption while maintaining measurement accuracy
Solution Approach 2:
The patent implements periodic measurement action by having the terminal device measure only at specific downlink symbols within the timeslot structure, rather than continuous measurement. The network device configures periodic measurement opportunities through measurement configuration information, reducing power overheads by enabling the device to enter low-power states between measurement points
3Adaptability or versatility
If the network device sends a maximum quantity L of synchronization signal blocks in a 5 millisecond time window, then the beam scanning capability is improved, but the measurement complexity increases
Solution Approach 1:
The patent segments the beam scanning process into discrete synchronization signal blocks transmitted at specific downlink symbols within a timeslot. The network device indicates which specific symbols contain synchronization signal blocks through measurement configuration information, allowing the terminal device to focus measurements on these segmented time points rather than scanning continuously, thus reducing complexity while maintaining beam scanning capability
Solution Approach 2:
The network device performs preliminary action by pre-configuring the terminal device with measurement configuration information that indicates specific downlink symbols for RSSI measurement. This preliminary configuration allows the terminal device to prepare for measurements at predetermined locations, reducing the complexity of real-time decision-making during the measurement process
Data Source
AI summary
An RSSI measurement method, a network device, and a terminal device are disclosed. The method includes receiving, by a terminal device, an RSSI measurement configuration message, where the measurement configuration message includes indication information of a time resource for RSSI measurement, and the time resource includes first downlink symbols and second downlink symbols in a timeslot in which a synchronization signal block is located, and measuring a received signal power on the first downlink symbols and the second downlink symbols, where the first downlink symbols include downlink symbols in which the synchronization signal block is located, and where the second downlink symbols include at least one downlink symbol other than the first downlink symbols.