As the digitization is integrated into daily life, media including video and audio are heavily transferred over the Internet nowadays.\nVoice-over-Internet Protocol (VoIP), the most popular and mature technology, becomes the focus attracting many researches and\ninvestments. However, most of the existing studies focused on a one-to-one communication model in a homogeneous network,\ninstead of one-to-many broadcastingmodel among diverse embedded devices in a heterogeneous network. In this paper,we present\nthe implementation of a VoIP broadcasting service on the open sourceââ?¬â?Linphoneââ?¬â?in a heterogeneous network environment,\nincluding WiFi, 3G, and LAN networks. The proposed system featuring VoIP broadcasting over heterogeneous networks can be\nintegrated with heterogeneous agile devices, such as embedded devices or mobile phones. VoIP broadcasting over heterogeneous\nnetworks can be integrated into modern smartphones or other embedded devices; thus when users run in a traditional AM/FM\nsignal unreachable area, they still can receive the broadcast voice through the IP network. Also, comprehensive evaluations are\nconducted to verify the effectiveness of the proposed implementation
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