Terminal Device High-Precision Time Information Acquisition
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Solution Overview
Problem
Existing communication systems, such as 4G and 5G mobile communication systems, face challenges in providing high-precision time information to terminal devices, especially when a terminal device of a later version accesses a network device of an earlier version.
Innovation Solution
A communication method and apparatus that enable a terminal device to obtain higher-precision time information by receiving first information from a first network device indicating that a second network device has more precise time information, and then receiving this time information from the second network device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a terminal device of a later version accesses a network device of an earlier version, then the terminal device can access the network, but the terminal device cannot obtain high-precision time information
Solution Approach 1:
The patent introduces a first network device as an intermediary between the terminal device and the second network device. The first network device receives indication information from the second network device about its time information precision capability, then forwards this information to the terminal device. This intermediary mechanism allows the terminal device to identify and access high-precision time information sources without requiring direct compatibility with newer network device versions, thus resolving the contradiction between time precision and version compatibility.
2Adaptability or versatility
If network devices of different versions provide time information, then broader device compatibility is achieved, but time information precision varies and cannot meet high-precision service requirements
Solution Approach 1:
The patent segments the network device functionality into two parts: older network devices can continue providing basic time information services, while newer network devices provide high-precision time information services. The terminal device, guided by the first network device, can selectively access the appropriate precision level based on service requirements. This segmentation allows both old and new network devices to coexist and serve different precision needs simultaneously.
Solution Approach 2:
The patent changes the parameter of time information precision by introducing indication information that communicates the precision capability of the second network device to the terminal device. This parameter change allows the system to dynamically select between different precision levels (standard precision from first network device or high precision from second network device) based on service requirements, thereby resolving the contradiction between universal compatibility and high-precision requirements.
Data Source
AI summary
A communication method and apparatus. A terminal device determines, based on first information received from a first network device, that a second network device has first time information, where the first time information is time information having precision that is higher than precision of second time information of the first network device. The terminal device obtains the first time information of the second network device based on the first information. The terminal device obtains high-precision time information to improve communication reliability.