Terminal Cell Search via Network Pre-Selection
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Solution Overview
Problem
Conventional communication technologies fail to provide an efficient and fast communication network search and access method for user terminals in high-speed moving states, leading to reduced user experience.
Innovation Solution
A communication network search method where a terminal device sends location and network type information to a network device, which responds with pre-selected cells, allowing the terminal to sift and search target cells based on motion status and location information, reducing power consumption and search time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device performs comprehensive cell search in all possible cells, then the coverage is complete, but the search time and power consumption increase significantly
Solution Approach 1:
The network device performs preliminary actions by pre-calculating and providing the terminal device with a limited set of candidate cells based on location information and motion status. This preliminary filtering reduces the search space before the actual cell search operation, thereby reducing search time while maintaining reliability.
Solution Approach 2:
Instead of treating all cells uniformly, the patent applies local quality by identifying and focusing search efforts on specific candidate cells that are most likely to be accessible based on the terminal's location and motion characteristics. This localized approach improves efficiency without compromising overall search completeness.
2Reliability
If the terminal device performs comprehensive cell search in all possible cells, then the coverage is complete, but the power consumption increases significantly
Solution Approach 1:
The network device performs preliminary actions by pre-calculating and providing the terminal device with a limited set of candidate cells based on location information and motion status. This preliminary filtering reduces the search space before the actual cell search operation, thereby reducing power consumption while maintaining reliability.
Solution Approach 2:
Instead of treating all cells uniformly, the patent applies local quality by identifying and focusing search efforts on specific candidate cells that are most likely to be accessible based on the terminal's location and motion characteristics. This localized approach improves efficiency without compromising overall search completeness.
3Productivity
If the terminal device uses location information to filter cells, then the search efficiency improves, but the device complexity increases
Solution Approach 1:
The network device acts as an intermediary that performs the complex cell filtering operation. It receives location information and motion status from the terminal, calculates the candidate cell set using sophisticated algorithms, and provides the filtered results to the terminal. This transfers the complexity from the terminal to the network, improving terminal search efficiency without significantly increasing terminal device complexity.
4Measurement precision
If the terminal device considers motion status information, then the cell search accuracy improves, but the processing complexity increases
Solution Approach 1:
The network device serves as an intermediary that processes motion status information to determine candidate cells. It incorporates velocity, acceleration, and trajectory data into its cell filtering algorithm, performing complex processing centrally rather than at the terminal. This improves cell search accuracy while minimizing the processing complexity burden on the terminal device.
Data Source
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AI summary
Embodiments of this application disclose a communication network search method and an apparatus. The method includes: A terminal device sends a first message to a network device. Herein, the first message includes a communication network type of the terminal device and first location information that is used during the sending of the first message. The terminal device receives a second message sent by the network device. Herein, the second message includes N cell identifiers, the N cell identifiers are used to mark N pre-selected cells, and the N pre-selected cells are determined by the network device based on the first location information and the communication network type. The terminal device determines M target cells in the N pre-selected cells based on second location information and motion status information that are used during the receiving of the second message. The terminal device searches for the M target cells. According to the embodiments of this application, communication network search and access efficiency can be improved, and user experience of the terminal device can be improved.