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Multimedia applications can be offered to mobile users on the IEEE 802.11 WLAN, if their bandwidth, delay and jitter requirements are met, even in the presence of handoffs. Applications such as VoIP require a delay of less than 150 msecs and packet loss less than 3%. Studies have shown that the latencies achieved by existing handoff implementations can exceed 200 ms and packet loss can exceed 10%...
This paper proposes a multi-channel token ring media access control (MAC) protocol (MCTRP) for inter-vehicle communications (IVC). Through adaptive ring coordination and channel scheduling, vehicles are autonomously organized into multiple rings operating on different service channels. Based on the multi-channel ring structure, emergency messages can be disseminated with a low delay. With the token...
Mobile IPTV is a technology that enables users to transmit and receive multimedia traffic anywhere and anytime, using any device. However, in a wireless environment, the network capacity often does not reliably support high-quality high-bandwidth IPTV service traffic. In this paper, a novel resource allocation scheme for Qos-guaranteed mobile IPTV that considers the TV viewing behavior of the user...
IP over TETRA is a solid and robust platform for secure and reliable data communications in the field of public safety and in for other PMR applications. In the paper the basic concepts of WAP application over TETRA network are presented. WAP over TETRA trial architecture is shown and an example of Web application ldquodangerous goodsrdquo is demonstrated. TETRA enhanced data services offered by TETRA...
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