Abstract:
해상 광대역 통신을 지원하는 해상통신 장치 및 해상통신 장치의 동작 방법이 개시된다. 해상 광대역 통신을 지원하는 해상통신 장치는 복수 개의 타 해상통신 장치로부터 타 해상통신 장치에 관한 제1 상태정보를 각각 수신하고, 상기 각각의 제1 상태정보에 기초하여, 상기 복수 개의 타 해상통신 장치 중 하나의 타 해상통신 장치를 결정하며, 상기 결정된 타 해상통신 장치에 접속하는 지상방향접속모듈과, 상기 복수 개의 타 해상통신 장치로 해상통신 장치에 관한 제2 상태정보를 발생하는 해상방향접속모듈을 포함한다.
Abstract:
The present invention relates to a device and method which performs wireless communication using a multiple-directional antenna. A vehicle according to the present invention comprises two or more communication devices. A communication device A of at least two communication devices includes a directional antenna group 1. The other communication device B includes a directional antenna group 2. The communication device A performs the directional antenna selection control of the directional antenna group 1 included in the communication device A according to the connection of a network of the communication device B. According to the present invention, a direction of a wireless signal is explored using a multiple-directional antenna. Wireless communication relay is performed using one or more antenna of the other communication device if one communication device is connected to a satellite network, a base station, or the other vessel using multiple communication devices. The present invention performs a role of a base station or an access point (AC). [Reference numerals] (AA) Land(or marine) base station; (BB) Satellite station; (CC) Other vessel; (DD) Vessel1; (EE) Vessel2
Abstract:
Disclosed is a wireless LAN based extended multi-hop relay network system for extending a land network service. This system includes a gate node which is connected to a wired service network or a wireless service network and performs a mutual communication conversion with a wireless LAN network, a relay node which is wirelessly connected to the gate node or another relay node and extends the wireless LAN network, and an extension network operating server which operates and manages the extended wireless LAN network. [Reference numerals] (100) Wired service network; (200) Wireless service network; (300) Gate node; (400,500) Relay node; (600) Extension network operating server
Abstract:
본 발명의 일 실시예에 따른 안테나 스위칭 시스템은 무선 신호 수신용으로 선박에 장착되는 다수의 지향성 안테나; 상기 다수의 지향성 안테나 들 중에 하나를 선택하는 안테나 스위치; 상기 안테나 스위치를 통해 상기 지향성 안테나와 연결되어, 수신 신호의 세기를 추출하는 모뎀; 및 상기 수신 신호의 세기, 송신측 선박 및 자신의 GPS/DR 정보에 기초하여 상기 안테나 스위치로 안테나 선택 신호를 출력하는 스위칭 판단부를 포함한다.
Abstract:
The present invention relates to a method and an apparatus of performing direction search and wireless communications by using multiple wireless channels, which is multiple frequency bands, in a wireless communications system, configured to use a plurality of directional antennas facing in different directions, to assign sequentially along the direction one by one in the frequency bands which are predetermined to the directional antennas, to compare the strength of signals received by the directional antennas, and to perform direction search and wireless communications of radio signals through the directional antenna having the most high strength of the received signal by comparing the strength of the received signals of the directional antenna. Therefore, the present invention can provide a frequency diversity effect in an environment where the received signal is severely changed by distance according to the frequency band by the interference of sea reflected wave such as sea.
Abstract:
The present invention relates to a wireless channel allocating device and method in a maritime communication system. The wireless channel allocating device in the maritime communication system according to the present invention allocates a wireless channel which is different from a wireless channel of an adjacent relay station based on the location information of the relay station to request connection and determines the change of the allocated wireless channel according to the number of the relay stations using the same wireless channel.