Method for realizing time synchronization between base stations as well as system and communication terminal therefor

Abstract

The embodiment of the invention discloses a method for realizing time synchronization between base stations, a system and a communication terminal therefor, which can still realize time synchronization between the base stations without adding a receiver for the slave base station and without periodically interrupting the service and under the circumstance that a slave base station can not obtain a time reference base station signal or no communication terminal is provided under the slave base station. The method provided by the embodiment of the invention comprises the following steps: the slave base station sends a report request for measuring a clock reference base station needed to be tracked to the communication terminal working under the slave base station, the measurement type carried in the request is a relative time delay of a downward Preamble signal between the slave base station and a clock reference base station, the report type is a periodic report, and the report period is the period of the idle synchronization; and the clock for the slave base station is adjusted by the slave base station according to the received measured report result of the communication terminal. The technical proposal provided by the embodiment of the invention can be used for time synchronization between the base stations in the wireless communication field.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a method and system for realizing time synchronization between base stations and a communication terminal. Background technique [0002] In modern wireless communications, a large number of requirements for indoor coverage and remote area coverage have emerged, and base stations have begun to be miniaturized and low-cost. In a scenario where indoor coverage is required, traditional synchronization acquisition mechanisms, such as the Global Positioning System (GPS, Global Positioning System), cannot solve the synchronization problem well. [0003] The GPS global positioning system is divided into: space part - GPS satellite constellation, ground control part - ground monitoring system and user equipment part - GPS signal receiver. The GPS satellite constellation and the ground monitoring system work together to provide accurate time signals to the ground. After recei...

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Problems solved by technology

[0006] In the process of realizing the present invention, the inventor found that the coverage area between the base stations of the same operator and the same technical system can only overlap in a small part, especially at the central position of the base station, that is, at the receiving antenna of the base station. Signals to other base stations, and in the scenario where coverage is required in remote areas, it is necessary to increase the receiver of the base station to receive the signal of the time reference base station. Therefore, the time synchronization is obtained by receiving the signal of the time reference base station in the area from the base station method, which can only be used in rare cases; and synchronization is a continuous and periodic process that requires periodic interruption of business to achieve synchronization, which will affect the complexity of system implementation and normal business performance

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