We consider an integrated-services communication network handling, in particular, best-effort data traffic and rate-regulated, delaysensitive variable bit-rate (VBR) traffic. From the user’s perspective, the pricing mechanism of the network may provide an incentive for the user to transmit best-effort packets in the real-time VBR channel, i.e., transmit best-effort packets “in-band” using some ...

In this paper, image transmission in underwater channels is considered. The images are encoded with forward error correction using an unequal error protection technique together with the Reed-Solomon codes and dynamic bit-rate allocation before transmitted. This paper proposes a novel rate allocation scheme for efficient image bit stream transmission in underwater acoustic channels with optimum...

This paper introduces a new differential spatial modulation (DSM) scheme which subsumes both the previously introduced DSM and high-rate spatial modulation (HR-SM) for wireless multiple input multiple output (MIMO) transmission. By combining the codeword design method of the HR-SM scheme with the encoding method of the DSM scheme, we develop a high-rate differential spatial modulation (HR-DSM) ...

It is important to transmit pictures efficiently in most Web sites, especially for those users with low bandwidth connections. In this demonstration, we propose a system which progressively transmits images using a very low transmission rate (as low as 15% in some cases). The transmitted images maintain a reasonable picture quality for the users to browse images quickly. Interested readers can ...

We introduce a specific transport and transmission scheme for video-on-demand (VoD) called constant-rate transmission and transport (CRTT). CRTT establishes a constant bit-rate (CBR) virtual channel between the video provider and the viewer’s set-top box (STB) and then transmits cells from the provider into this channel at a constant rate. Since we assume that the number of cells in a frame is ...

Regulating the transmission rate of non real-time applications offers enhanced flexibility for QoS management and capacity control on a CDMA link. For a system working at saturation conditions, i.e., with the highest number of on-going transmissions, controlling data rates can further enhance its capacity. A more thorough investigation of this possibility and the trade-offs involved is presente...

In ATM-based communication networks, the transmission links that interconnect the network nodes do not necessarily operate at the same transmission speeds. If the speed of the incoming link in a node exceeds the speed of the outgoing link, a rate adaptation buffer must be provided in order to avoid frequent cell loss. This paper presents an analytical queueing analysis of a rate adaptation buff...

Second-order neurons L1-3 of the locust ocellar pathway make inhibitory synapses with each other. Although the synapses transmit graded potentials, transmission depresses rapidly and completely so that a synapse only transmits when the presynaptic terminal depolarizes rapidly. The rate at which a presynaptic neuron depolarizes determines the rate at which a postsynaptic neuron hyperpolarizes, a...