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Mobile infostation network is proposed as a new network paradigm to provide users with wireless data services, and a good tradeoff between the connectivity requirement and economic investment can be achieved. Mobile infostation network can offload delay-tolerant traffic from cellular network leaving more resource for mobile real-time applications. Under the mobile infostation network architecture,...
Mobile infostation networks which achieve content distribution by exploiting the opportunistic contact among mobile users (MUs) and access points (APs) have attracted a lot of attention in the last few years. It is found that cooperation either between APs or MUs has a great impact on the network performance. However, in most of the existing works wherever cooperation is involved, cooperation among...
We consider a cognitive relay network (CRN) where the secondary users (SUs) are involved as cooperative relays in a primary user's (PU) communication. To avoid generating interference to PU transmissions, it is assumed that SUs can transmit only when the PU's channel is idle. On one hand, SUs use some relay powers to speed up the PU's transmissions. Consequently, PU's buffer will be depleted faster,...
Through one-to-one and face-to-face interviews and focus groups, it is found that the life cycle of an online game can be divided into four stages-Trying Stage, Indulging Stage, Retaining Stage, and Leaving Stage-on the basis of how the players like or indulge in as well as how much time and energy the players spend on it. The online-game life cycle contains not only the above typical four stages...
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