NTN Cell Reselection Using Sub-Area Frequency Measurement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional terrestrial networks face challenges in providing seamless coverage in areas where base stations cannot be deployed, leading to excessive energy consumption in terminal devices due to the need to measure a large number of frequencies for cell reselection in non-terrestrial networks.
Innovation Solution
Implementing area configuration information to determine sub-areas within a cell, allowing measurements to be performed based on neighboring frequencies and cells within that sub-area, and utilizing configuration information to deactivate or reduce the priority of certain cells to minimize energy consumption and accelerate reselection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the terminal device measures all neighboring frequencies in the NTN cell coverage area, then cell reselection accuracy is improved, but energy consumption increases
Solution Approach 1:
The patent divides the NTN cell coverage area into multiple sub-areas, each associated with specific neighboring frequencies. Instead of measuring all neighboring frequencies across the entire coverage area, the terminal device determines its current sub-area and only measures the neighboring frequencies relevant to that sub-area. This segmentation approach maintains measurement accuracy for the device's current location while reducing overall energy consumption.
Solution Approach 2:
The patent implements local quality by providing different neighboring frequency information for different sub-areas within the NTN cell coverage. Each sub-area has its own set of relevant neighboring frequencies configured by the network device. The terminal device adapts its measurement behavior to the local characteristics of its current sub-area, measuring only the frequencies that are actually relevant for cell reselection in that specific location.
2Reliability
If the terminal device measures all neighboring frequencies, then reselection reliability is improved, but measurement time increases
Solution Approach 1:
The patent segments the measurement task by dividing the coverage area into sub-areas and associating specific neighboring frequencies with each sub-area. The terminal device performs measurements only on the neighboring frequencies relevant to its current sub-area, rather than exhaustively measuring all possible neighboring frequencies across the entire NTN cell coverage. This reduces measurement time while maintaining reliability for the device's current location.
3Quantity of substance
If the network device provides neighboring frequency information for all sub-areas, then measurement completeness is improved, but information transmission overhead increases
Solution Approach 1:
The network device performs preliminary action by configuring and providing neighboring frequency information for all sub-areas in advance, before the terminal device needs to perform measurements. This allows the terminal device to quickly determine its current sub-area and access the pre-configured relevant neighboring frequencies without requiring extensive real-time information exchange, thus reducing transmission overhead while maintaining measurement completeness.
Data Source
AI summary
Embodiments of this application provide a communication method, device, and system, to reduce energy consumption of a terminal device and accelerate reselection performed by the terminal device. In this solution, a network device determines a plurality of sub-areas, and sends area configuration information to the terminal device. The terminal device receives the area configuration information, determines a first sub-area based on the area configuration information, and performs measurement based on information about one or more neighboring frequencies corresponding to the first sub-area. A geographical area range including the plurality of sub-areas includes a coverage area of a first cell, the area configuration information indicates information about the plurality of sub-areas, and the first sub-area is a sub-area in which the terminal device is currently located in the plurality of sub-areas.