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This paper investigates the use of WiFi and mobile device-to-device networks, with vehicular ad hoc networks being a typical example, as a complementary means to offload and reduce the traffic load of cellular networks. A novel cooperative content dissemination strategy is proposed for a heterogeneous network consisting of different types of devices with different levels of mobility, ranging from...
This paper studies a concurrent transmissions MAC (CT-MAC) protocol with power control and improves the best value of collision domain to make it more suitable for direct sequence ultra-wideband (DS-UWB) system. CT-MAC protocol realizes multi-channel transmission by identifying users with different spreading codes. In CT-MAC protocol, nodes of network calculate collision domain each time when they...
The wireless data transmission network in space capsule is gradually becoming important with the development of communication and aerospace technology. Ad hoc network and Ultra Wideband (UWB) are the current hotspots in the wireless communication. However, relevant research on data network is not enough and the system model of network is not quite complete or mature. In this paper, a wireless data...
In this paper, we investigate a new power allocation scheme for a multi-user orthogonal frequency division multiplex (OFDM) system, in which two cooperative power sources (CPS) coordinately transmit their power to multiple orthogonal subchannels. In order to maximize the sum rate, a closed form solution is obtained by analytical derivation. Based on the derived solution, we present a novel joint optimal...
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