VoIP services for ocean fishery vessels over integrated wireless and wireline networks

To support maritime voice service for mobile users on ocean fishery vessels, it is a promising approach to integrate heterogeneous wireless and wireline networks including maritime wireless mesh network (WMN), satellite mobile network, and Internet. In such a networking environment, the ship-to-ship and ship-to-shore VoIP calls traverse different networking paths. When applying traditional Mobile IP and SIP protocols directly without differentiating these two kinds of VoIP services, it is challenging to support them cost-effectively with acceptable QoS. To deal with the faced technical challenges, this paper proposes to employ dual IP addresses and dual SIP addresses for user mobility and VoIP session managements. With such a proposal, best data path selection can be achieved during VoIP call setup and data delivery by differentiating two kinds of VoIP calls. The reduced involvement of satellite link with best data path selection yields the benefits of decreased data transmission delay and lower calling charge for maritime VoIP services over such an integrated wireless/wireline network.