Molecular communication is a new nano-scale communication paradigm that enables nanomachines to communicate with each other by emitting molecules to their surrounding environment. Nanonetworks are also envisioned to be composed of a number of nanomachines with molecular communication capability that are deployed in an environment to share specific molecular information such as odor, flavour, li...

ion levels for communication modeling Table 1 summarizes the semantics associated with Colif’s communication channels, or generalized nets, at the various abstraction levels. The service, message, and driver levels collectively constitute what is usually called the system level. Three features characterize communication channels: medium, data type, and behavior. The medium is the infrastructure...

Many WDM architectures are based onJixed wavelength channels which require the lasers to be tuned to their channels accurately. Achieving this task is difJicult and costly especially in the distributed environments. Robust WDM is an approach that tolerates large laser wavelength variations, due to temperature drifts and manufacturing tolerances. A reservation-based medium access protocol is use...

In this thesis we investigate the capacity of multi-user wireless communication channels. We first establish a duality relationship between the Gaussian broadcast and multiple-access channels. This relationship allows us to characterize the capacity region of the Gaussian broadcast channel in terms of the dual Gaussian multiple-access channel, and vice versa. This relationship holds for constan...

Optical transmission technology is studied actively in order to realize high-speed transmission and broadband networks. However, conventional packet-based switching technology cannot realize the true high quality communication for each connection. Then we propose λ computing environment which has the virtual channels utilizing optical fibers connecting computing nodes. So we can offer the high-...

normal 0 false false false en-us x-none ar-sa microsoftinternetexplorer4 introduction: providing free access to the latest research and more publishing channels, open access (oa) is hoped to decrease the south countries' information poverty and professional isolation. due to its particular importance, it is necessary to investigate how they exploit open access resources. methods: applying a cit...

Covert network timing channels control time between transmissions of packets in overt network communication and transmits hidden messages. This paper presents an overview of different concepts of covert timing channels such as types, features and properties. There is range of terms used for security of information such as encryption, covert channels, network steganography or information hiding ...