Terminal, base station, communication system and communication method

Abstract

The invention discloses a terminal, a base station, a communication system and a communication method. The terminal comprises a time service module and an awakening module. The time service module issynchronized with all base station clocks in a wide area network. The awakening module is used for opening a listening state at predetermined time. Through arranging the time service module and opening the listening state at the predetermined time, the technical problem of how to make the low-power-consumption wide area network system ensure the time delay (real-time performance) of a downlink command or data while maintaining low power consumption is solved so that the technical effect of ensuring the availability and the stability of time synchronization without affecting power consumption is achieved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of the Internet of Things, and specifically relate to a terminal, a base station, a communication system, and a communication method. Background technique [0002] Low Power Wide Area Network (LPWAN) is a wireless network communication technology optimized for machine-to-machine (M2M) communication scenarios in IoT applications. It usually has the characteristics of battery power supply, ultra-low power consumption, low data volume, low speed, low communication frequency, large-capacity access, and a single base station coverage distance of tens of kilometers. It is a key supporting technology for the Internet of Things. [0003] In the existing LPWAN technology, in order to achieve low power consumption of the terminal, there is only one or a small number of interactions between the terminal and the base station each time. This means that there is a long interval between two communica...

AI Technical Summary

Problems solved by technology

However, there are still problems, mainly because the time synchronization achieved by this method is actually exchanged at the cost of "increasing interaction on the communication protocol"

This will lead to the following problems: (1) In order to achieve synchronization, more communication channel resources will be occupied, thereby reducing the load capacity of the entire network; (2) During the time synchronization between the terminal and the base station, the terminal is basically unreachable ; (3) When the terminal moves (roams) between multiple base stations, the terminal needs to resynchronize with the base station, which makes the terminal unreachable for a longer and unpredictable time

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