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The skyrocketing increase of mobile traffic exacerbates the stringent demand for high spectrum efficient communications. In this paper, a spectrum reuse scheme is proposed for heterogeneous networks (HetNets) using Stackelberg game approach to decrease cross-tier interference, thereby effectively improving spectrum efficiency. The macro base stations (BSs), acting as leader in the game, allocate a...
Base station (BS) sleeping has been proved to be an effective technique for saving energy consumption in cellular networks. However, BSs in sleeping mode might cause coverage holes, which have a negative impact on the connectivity of the network. In order to overcome this problem, we propose a combined coordinated multi-point (CoMP) transmission and BS sleeping scheme under the heterogeneous networks...
In heterogeneous networks (HetNets), due to transmit power disparity between macro and pico base stations (BSs), the conventional strongest downlink (DL) reference signal received power (RSRP) based user association results in high uplink (UL) interference. Such interference degrades the UL performance especially in terms of energy efficiency. In this paper, we propose Joint Uplink and Downlink User...
Joint relay selection and spectrum allocation scheme with multiple source-destination pairs and multiple potential relays in cooperative relay networks is proposed in this paper. In cooperative relay networks, the selected relay nodes and spectrum resource allocated to each source-destination pair have great impact on the system performance. It is an optimization problem for which relay nodes are...
In cooperative relay networks with multiple users and multiple potential relays, which relay nodes are selected has great impact on the system performance. It is an optimization problem for selecting suitable relay nodes. The exhaustive search can solve this problem but the complexity will increase factorially with the network size, i.e., the number of users and the number of relays in the network...
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