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In opportunistic mobile networks (OppNets), nodes should be in listening state to discover the neighbors for opportunistic message forwarding. While in OppNets, contacts between nodes are sparse, most of nodes' energy is consumed in idle listening state, which highlights the need for energy saving in contact probing. Duty cycle operation can be applied to address this problem. However, it may cause...
In this paper, we investigate the sustainable resource allocation for green Cloud Radio Access Networks (C-RAN) powered by renewable energy. Specifically, the Base Station pool (BS pool) in the C-RAN distributes data to a set of remote radio heads (RRHs) with energy harvesting (EH) capability, and allocates sub-carriers to the selected RRHs for downlink transmissions, by jointly considering the user...
Rate adaptation is one of the key factors to improve the performance of the link layer of IEEE 802.11 WLAN. Yet most of the existing rate adaptation policies and algorithms do not consider the effect of the losses due to collisions. To mitigate the effect of collisions, a rate adaptation scheme based on the receiver's SNR is proposed in this paper. It reflects the link condition correctly even when...
Multicast is a spectrum-efficient way to support emerging multimedia services over wireless network, where a group of users receive messages over a common wireless channel. Cooperative transmission is a promising technology to improve multicast performance by exploring the cooperative diversity. Different from conventional cooperative multicast schemes, we take the heterogeneity of the multicast group...
In order to guarantee the QoS for multimedia data transmission over wireless ad hoc network, the data flow entering the node was regulated by leaky bucket, and the node provided rate-latency service for the flow. We had derived the end-to-end upper jitter bound for wireless ad hoc network based on the existing link throughput model using network calculus theory, for grid network topologies, all simulated...
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