Ship to shore maritime communication for e-Navigation using IEEE 802.16e

Choi, Myeong Soo; Jeong, Min Ah; Jeon, Sung Min; Kim, Ju Hyeon; Kim, Cheol Ho; Lee, Hye Jin; Park, Hye Min; Choo, Jong Yun; Lee, Seong Ro

doi:10.1109/ictc.2013.6675472

Cited by 6 publications

(2 citation statements)

References 5 publications

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“…SYAN differs from regular channel environments in that they are sealed and contain metallic structures needed for operations, both of which factors are notorious for hindering signals [1]. Metallic structures cut off and reflect RF and this result in multipath propagation and long delay time due to the reflected signals.…”

Section: Syan Communication Channel Modelmentioning

confidence: 99%

“…Wireless communication and Ubiquitous Sensor Network (USN) are most actively utilized in ship construction yards with main yard as a center of communication. Ship and Yard Area Network (SYAN) is the most actively researched subject among other IT technology researches for shipyards [1]. Wired or cable network may be utilized for such environments, but it is too expensive and difficult to maintain, especially in cruise ships or digital ships.…”

Section: Introductionmentioning

confidence: 99%

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An OFCDM System in Ship and Yard Area Network

Jun¹,

Lee²

2015

IJIEE

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Abstract-Ship and yard area environments contain materials mainly composed of metals, which also are applied to the interior structures. Such environments embody air channels characterized by several multipath propagation delays and long maximum delay time. Channel models for ship and yard area network are proposed, and existing communication systems Zigbee, Wifi, and Wibro are evaluated in the channel models. The existing systems such as orthogonal frequency division multiplexing (OFDM) and code division multiple access (CDMA) are combined to produce different variations of orthogonal frequency and code division multiplexing (OFCDM) for experimentation and application. The performance of proposed OFCDM was experimented in ship and yard area network environments. propose OFCDM system which has three versions in Section III. The results of the proposed system in SYAN channel model are shown in Section IV. In the last section, conclusions are reached. Index Terms-OFCDM II. SYAN COMMUNICATION CHANNEL MODELSYAN differs from regular channel environments in that they are sealed and contain metallic structures needed for operations, both of which factors are notorious for hindering signals [1]. Metallic structures cut off and reflect RF and this result in multipath propagation and long delay time due to the reflected signals. A channel environment resembling that of downtown city centers is substituted for the Wibro system in order to satisfy the condition of long delay time. Downtown city centers satisfy the condition of long delay time because the signals must travel through large, high buildings in city centers. It also possesses a certain amount of multipath propagation due to densely locate buildings, but it is not as significant as that in SYAN environments [9]. Thus, a channel environment resembling those of interior factories environment is applied to Wibro channel environment [10]. Factory environment is applied because of its desirable characteristics similar to those of shipyards for containing metallic structures that create multipath propagations [9], [10]. As indicated in Fig. 3, model OFCDM I is a model where Two-Dimensional (2D) spreader and 2D de-spreader blocks of the CDMA functions are added on the existing OFDM communication system. 2D spreaders expand the time and frequency of data. A symbol of OFDM from transmitter indicated in Fig. 4(a) is spread 4 times in terms of time using time code and spread 2 times in terms of frequency using frequency code as shown in Fig. 4(b). Consequently, Fig. 4(c) shows the data is expanded 8 times in terms of time and frequency. Finally, IFFT of OFDM is applied and sent. In the receiver, 2D spreader combines the data using time code, and executes final decision of the combined data using the frequency code to print data as indicated in Fig. 5.Performance is improved by increasing data's SNR by using the method above of expanding the data in terms of time and frequency from in the transmitter, and combining data in the receiver. As indicated in Fig. 6, model OFCD...

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Section: Syan Communication Channel Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An OFCDM System in Ship and Yard Area Network

Jun¹,

Lee²

2015

IJIEE

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Research on the scheme of radio cooperative spectrum sensing for offshore ships based on trust degree in Ad Hoc network mode

Zhang

Chai

et al. 2021

J. Phys.: Conf. Ser.

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Radio communication is an important part of maritime communication. As the number of ships in the offshore area continues to increase, spectrum resources appear to be particularly tight. In this work, a trust-based cooperative spectrum sensing scheme in Ad Hoc network is proposed to improve the accuracy and reliability of maritime radio communications. This scheme first divides the ship nodes into different subnets according to the Ad Hoc network protocol. And after the malicious ship nodes are selected based on actual conditions, a trust-based collaborative spectrum sensing fusion method will be given, that is, a smaller trust weight is given to malicious nodes, the method will be more trustworthy to receive the spectrum occupancy information provided by ship nodes with a higher degree of trust. Simulations have been performed to illustrate the high detection probability of the proposed spectrum sensing scheme. Therefore, it is feasible and beneficial to apply the proposed spectrum sensing scheme to improve the trustworthiness of maritime radio communication.

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