Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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SANETconf: an IP configuration protocol for a shipborne ad-hoc network (SANET)

SANETconf: 선박 애드혹 네트워크를 위한 IP 할당 프로토콜

  • Yun, Changho (Korea Research Institute of Ships & Ocean Engineering (KRISO))
  • Received : 2018.12.17
  • Accepted : 2019.01.20
  • Published : 2019.02.28
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Abstract

Additional frequencies are allocated in maritime digital data exchange to alleviate overload of the VHF data link. The shipborne ad-hoc network (SANET) for this frequencies was subsequently proposed, which provides various IP-based services to ships on behalf of satellite communications. In SANET, a ship should determine its own IP address to achieve IP connectivity to the shore. Accordingly, this paper proposes a SANET configuration (SANETconf) protocol as an IP configuration protocol. SANETconf propagates non-overlapping IP addresses across the network from the shore to ships. A ship obtains its IP address by exchanging Request and Response messages with its neighbors. Therefore, SANETconf eliminates the process of DAD and managing the movement of ships. Extensive simulations were performed to verify the applicability of SANETconf. Based on results, 85% of the ships can determine their own IP address within one frame. Also, SANETconf has a high resource efficiency by using 0.024 percent of resources for IP configuration.

해상 초단파 대역 데이터 링크의 과부하를 경감시키고, 디지털 데이터 교환에 사용하기 위해 추가적으로 주파수가 할당되었다. 이어서 이 주파수 대역에 적용할 수 있는 선박용 애드혹 네트워크 기술 (shipborne ad-hoc network; SANET)이 제안되었다. SANET은 고가의 위성 통신을 대신하여 해상에서도 선박국에 다양한 IP 기반의 데이터 서비스를 제공하기 위해 개발되었다. SANET에서는 육상 국으로의 IP 연결성 (connectivity)을 제공하기 위해, 선박국이 자신의 IP 주소를 할당받는 것이 우선적이다. 본 논문에서는 선박국들이 스스로 자신의 IP 주소를 할당할 수 있는 SANET configuration (SANETconf) 프로토콜을 제안한다. SANETconf는 중복되지 않는 다수의 IP 주소들을 육상국에서 선박국들에 이어지는 트리 형태로 네트워크 전반에 전파한다. 선박국은 IP 주소를 할당할 수 있는 자신의 이웃과 간단한 요청(Request) 및 응답(Response) 메시지 교환을 통해 자신의 IP 주소를 할당한다. 따라서 SANETconf는 IP 충돌 방지 (Duplicate Address Detection) 과정과 선박국의 이동에 의해 발생하는 네트워크의 분리나 통합에 따른 처리 과정을 완전히 배제할 수 있다. 이 프로토콜의 SANET의 적용가능성을 검증하기 위해 다양한 모의시험을 수행하였다. 모의시험 결과, SANETconf를 이용하여 네트워크의 85퍼센트의 선박국들이 한 프레임 (1분) 내에 자신의 IP 주소를 결정할 수 있음을 확인하였다. 또한, 선박국들은 자신의 IP 주소를 할당하는데 네트워크 리소스의 0.024 퍼센트만 사용하여 SANETconf가 네트워크 리소스의 효율성이 높음이 확인되었다.

Keywords

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Fig. 2 SANET architecture [14].

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Fig. 3 The procedures of the SANETconf.

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Fig. 4 The SANET topology for simulations.

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Fig. 5 The IP allocation rate of the SANETconf. (a) The IP allocation rate according to TIP. (b) The IP allocation rate according to ω.

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Fig. 6 The IP allocation time of the SANETconf. (a) The IP allocation time according to TIP. (b) The IP allocation time according to ω.

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Fig. 7 The message overhead of the SANETconf. (a) The message overhead according to TIP. (b) The message overhead according to ω.

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Fig. 1 The concept of the SANETconf.

Table. 1 SANETconf parameters description.

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Table. 2 AODV parameters values.

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  1. SANET-CC : 해상 네트워크를 위한 구역 IP 할당 프로토콜 vol.26, pp.4, 2019, https://doi.org/10.13088/jiis.2020.26.4.087