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As the rapid growth of the data traffic, the mobile cellular network is under unprecedented operation pressure. Various of small cells with relay technologies have been proposed to bypass increased data with the status of the limited base station so far. Therefore, vehicular small cell gradually are attracting the attention of the researchers. In this paper, we discuss the communication model of the...
In Mobile Opportunistic Networks, there are special cases of multicast in which destinations (except the total number) are not predetermined. E.g., a person tries to find another three players to play poker without knowing them. Achieving efficient data routing in this scenario (target any k destinations among m of them) can be very challenge due to (1) no predetermined destinations, (2) extra delay...
In this paper, we develop a simple closed-form generalized likelihood ratio test (GLRT) detector for a multi-relay amplify-and-forward (AF) cooperative network employing noncoherent M-ary frequency-shift keying (M-FSK). The proposed detector is robust in the sense that it does not require any prior knowledge about the channels such as the variance of the additive white Gaussian noise, the fading model,...
In this paper, we study the outage probability performance of a very well-known bidirectional protocol based on decode-and-forward relaying: physical-layer network coding (PNC). We first derive an exact closed-form outage probability expression for the PNC protocol. To provide more insight, we also derive asymptotic outage probability expression. Finally, the validity of the derived expressions is...
With rising concerns on user privacy over the Internet, anonymous communication systems that hide the identity of a participant from its partner or third parties are highly desired. Existing approaches either rely on a relative small set of pre-selected relay servers to redirect the messages, or use structured peer-to-peer systems to multicast messages among a set of relay groups. The pre-selection...
We study the optimum maximum-likelihood (ML) detection and sub-optimum detection with limited channel state information (CSI) for a multi-branch dual-hop cooperative diversity network which consists of a source, multiple relays, and a destination without a direct source-destination path. With the limited CSI, the signalling overhead at each relay is reduced by 50%. We first derive the optimum ML detection...
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