CSTDMA-SOTDMA double-system AIS transceiver

Abstract

The invention relates to a CSTDMA-SOTDMA double-system AIS transceiver which consists of a baseband control module, an external interface module, a GPS module, an AIS radio-frequency transmission module and a power supply module. The realization of the CSTDMA-SOTDMA double-system function is based on the combination of hardware and baseband control module software. According to the presetting of equipment, the CSTDMA-SOTDMA double-system AIS transceiver selects a system and runs, and when a base station instruction is received or the special skip condition is met, the CSTDMA-SOTDMA double-system AIS transceiver is switched to another system. The invention has the advantages that the use system of the equipment is automatically switched by a built-in running environment or according to an external instruction, the equipment can both have the advantages of the CSTDMA access system and the SOTDMA access system, the CSTDMA access mode is used in crowded territorial water, the interference to channels can be effectively reduced, the AIS function of large ships is not influenced, the transceiver is switched to the SOTDMA mode by the instruction in the territorial waters controlled by old-model base stations, one equipment can have the characteristics of two systems simultaneously, and the compatibility problem can be effectively solved.

Description

technical field [0001] The invention relates to the field of ship-borne automatic identification system (AIS), in particular to a CLASS_B type CSTDMA-SOTDMA dual-mode AIS transceiver suitable for use on small non-SOLAS convention ships. Background technique [0002] In the current field of marine vessel safety, AIS is the most important part. AIS equipment currently on the market basically adopts a single access method: one of CSTDMA or SOTDMA, both of which have their own characteristics in use, and SOTDMA has greater accuracy in time slot access and compatibility with AIS applications. Advantages, while CSTDMA has excellent channel protection characteristics, and its operation has the least impact on large ships in the channel. It has a high degree of safety in crowded places and is extremely suitable for national conditions. [0003] If the AIS equipment can combine the advantages of CSTDMA access system and SOTDMA access system, and use CSTDMA access mode in the crowded...

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Problems solved by technology

[0003] If the AIS equipment can combine the advantages of CSTDMA access system and SOTDMA access system, and use CSTDMA access mode in the crowded sea area of ​​ships, it can effectively reduce the interference to the channel without affecting the AIS function of large ships. In the sea area controlled by the old base station , by ordering to switch to SOTDMA mode, one device can have the characteristics of two standards at the same time, which can effectively solve the compatibility problem, but currently there is no such device in China that is used in this technical field

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