A synchronization method and device
A technology of synchronous head and reference position, which is applied in the field of communication, can solve the problems of vehicle-mounted equipment synchronization, low availability of individual equipment, and inability of individual equipment, so as to achieve the effect of improving availability
Active Publication Date: 2021-04-27
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology
When using the existing method for synchronization, if the individual equipment is within the signal coverage of the cell established by the vehicle equipment, it can communicate with the vehicle equipment to achieve synchronization, such as figure 1 As shown, the individual soldier device 1 can be synchronized with the vehicle-mounted device; but if the individual soldier device moves outside the signal coverage of the cell established by the vehicle-mounted device, the individual soldier device cannot be synchronized with the vehicle-mounted device, as shown in figure 1 As shown, the individual device 2 cannot be synchronized with the vehicle device
At this time, the target terminal signal acquisition error will be caused, resulting in positioning failure and low availability of individual equipment
Method used
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[0025] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0026] In the prior art, the individual equipment is synchronized based on the synchronization signal sent by the vehicle equipment. When the individual equipment is outside the coverage area of the vehicle cell, the individual equipment cannot be synchronized with the vehicle equipment, so that the individual equipment cannot The target mobile terminal (the mobile terminal that needs to be positioned) performs positioning, and the availability of individual equipment is low; therefore, embodiments of the present invention provide a synchronization method to solve the above problems; details are as follows:
[0027] Since the coverage of the public network cell (which may refer to the cell created by the base station) is relative...
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Embodiments of the present invention provide a synchronization method and device. The method is applied to active positioning equipment. The active positioning equipment includes individual equipment and vehicle-mounted equipment, including: the individual equipment performs cell search, and determines the corresponding Signal strength, cells include public network cells and / or vehicle-mounted cells; determine the cell with the strongest signal strength, and receive the downlink signal sent by the cell with the strongest signal strength; according to the downlink signal, determine that the cell with the strongest signal strength corresponds to the master clock synchronization The current position of the head; adjust the local clock of the individual device by adopting the method that the current position is close to the reference position, so that the individual device and the vehicle-mounted device are synchronized; where the reference position is the corresponding master of the vehicle-mounted device determined for the first time after the individual device is started. The location of the clock synchronization header. Therefore, no matter whether the individual equipment is within the coverage of the vehicle cell or not, the individual equipment can be synchronized with the vehicle equipment, thereby improving the availability of the individual equipment.
Description
technical field [0001] The present invention relates to the technical field of communication, in particular to a synchronization method and a synchronization device. Background technique [0002] At present, active positioning equipment is usually used to find the position of the target mobile terminal. The active positioning equipment includes: vehicle-mounted equipment and individual equipment; wherein, the process of locating the position of the target mobile terminal is as follows: the vehicle-mounted equipment establishes FDD (Frequency Division Duplex, Frequency Division Duplex) standard cells, or TDD (Time Division Duplexing, Time Division Duplex) standard cells, absorb all nearby mobile terminals (that is, allow all mobile terminals to access the established cells), according to the mobile terminal IMSI (International MobileSubscriberIdentificationNumber, International Mobile Subscriber Identification Number), releases mobile terminals that do not need positioning to...
Claims
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IPC IPC(8): H04W56/00H04B17/318
CPCH04W56/001H04W64/00H04B17/318
Inventor 李青
Owner DATANG MOBILE COMM EQUIP CO LTD