Due to the special geographic position, the coverage of costal BS cannot reach the further sea area, which, to some extent, affects the communication quality of the users working at sea and thereby cause some loss of users. So, the offshore coverage is a key factor in enhancing operator’s reputation and enlarging user numbers.

    Solutions: Employ Base Station Amplifier or Tower-mounted Amplifier associated with the Base Station Extending System to effectively enhance the BS signals. Meanwhile, adjust some relevant parameters of the BS to expand the BS sea coverage area. Another way is to adopt outdoor repeaters with high output power to fulfill the offshore coverage, thereby providing clear communication environment for the users working at sea.