Wireless mobile simulcast system, synchronizing method and synchronizing equipment
A synchronization equipment, wireless technology, applied in the direction of synchronization device, wireless communication, electrical components, etc., can solve the problem of infeasibility
Inactive Publication Date: 2013-01-23
KIRISUN COMM
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Problems solved by technology
[0005] Most of the current wireless mobile co-frequency co-broadcast system base stations use GPS signals as the time-base synchronization signal of the entire network, which is reliable and feasible in outdoor environments, but for co-frequency co-broadcast networks with shorter distances similar to indoors , the solution is not feasible due to the inability to receive GPS satellite signals
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[0054] The staff will use the synchronization equipment to perform time calibration (also called "time synchronization") on the repeaters of each base station in turn. This calibration is automatically carried out in the air. Every time the calibration is completed, the synchronization equipment will prompt through the display screen or sound, etc. The method notifies the staff that the clock synchronization process of the current base station is completed, so that the staff can perform time calibration on all the base stations in the network. After that, the network can work normally. When the working time of the network exceeds the synchronization time maintained by the high-precision clock, the staff need to repeat the time calibration process for each base station.
[0055] To sum up, the present invention adopts the synchronization equipment and the method of the repeater's own high-stability clock to realize network synchronization, so as to be better applied to the occas...
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The invention provides a wireless mobile simulcast system, a synchronizing method and synchronizing equipment. The system is composed of at least one base station, an interphone and the synchronizing equipment, wherein the base station is composed of a transferring platform and a link machine; the synchronizing equipment is in wireless communication link with the base station and is used for transmitting time synchronization information to the transferring platform; and the transferring platform is used for adjusting a local clock according to the received time synchronization information. The high-stability clocks of the synchronizing equipment and the transferring platform are used for realizing network synchronization, and thus the wireless mobile simulcast system can be better applied to emergency communication network occasions with short time and short distance; and after the synchronizing equipment is used for adjusting the local clocks of the base stations in a common-frequency simulcast network, the base stations can normally work within the synchronous maintenance time of the high-precision clocks, so that the wireless mobile simulcast system is especially suitable for emergency communication occasions needing temporary common-frequency simulcast base stations.
Description
technical field [0001] The invention relates to the field of wireless mobile communication, in particular to a wireless mobile simulcast system, a synchronization method and a synchronization device. Background technique [0002] The wireless mobile simulcast system is to establish multiple same-frequency repeaters in an area, and use links to connect these repeaters. Each repeater is responsible for a certain range of coverage. In this way, multiple same-frequency repeaters and links A wide range of simulcast coverage can be achieved through the connection. [0003] However, if multiple repeaters are simply installed in order to achieve the purpose of a simulcast system, then the overlapping area between each repeater will inevitably produce co-channel interference. Assuming that two co-frequency relay stations A and B are working at the same time, there will be an interference blind area and an interference howling area near the iso-strong line of the two areas. In sever...
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IPC IPC(8): H04W56/00
Inventor 何洁姚忠邦
Owner KIRISUN COMM