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Caching on the edge has been recognized as an effective solution to tackle the backhaul constraint of network densification. However, most related works ignored user mobility in wireless networks, which is unreasonable under the background of network densification. For a more flexible and context-aware caching decision, the concept of caching on the edge can be extended to mobile edge computing (MEC)...
The emerging 5G wireless networks will pose extreme requirements such as high throughput and low latency. Caching as a promising technology can effectively decrease latency and provide customized services based on group users behaviour (GUB). In this paper, we carry out the energy efficiency analysis in the cache-enabled hyper cellular networks (HCNs), where the macro cells and small cells (SCs) are...
The densification of small cells (SCs) and caching at the edge are two promising approaches to improve the network throughput, reduce end-to-end delay and backhaul cost in future 5G wireless networks. However, current analysis and design only focus on the system state at a certain time, neglecting the temporal-spatial fluctuation of traffic and the content popularity variations, which are often affected...
With the worldwide evolution of 4G generation and revolution in the information and communications technology(ICT) field to meet the exponential increase of mobile data traffic in the 2020 era, the hybrid satellite and terrestrial network based on the soft defined features is proposed from a perspective of 5G. In this paper, an end-to-end architecture of hybrid satellite and terrestrial network under...
The network densification of small cells (SCs) is a promising way to cope with the explosive growth of future traffic demands in 5G networks. However, the overall power consumption and the backhaul limitation of the network have become the key factors affecting the network performance and users’ quality-of-experience, which have great importance in 5G wireless networks. Due to the complexity of 5G...
Over the last decade, the explosive increase in demand of high-data-rate video services and massive access machine type communication (MTC) requests have become the main challenges for the future 5G wireless network. The hybrid satellite terrestrial network based on the control and user plane (C/U) separation concept is expected to support flexible and customized resource scheduling and management...
One of the main purpose for heterogeneous networks (HetNet) is to reduce the power consumption for various spectrum allocation schemes. Large-scale user behavior in a two-tier HetNet is considered for the energy-efficient spectrum allocation, which characterizes the macro BSs that guarantee traffic requirements in non-hotspot regions and micro BSs that guarantee traffic requirements in hotspot regions...
This paper proposes a space-time scheduling algorithm that improves the throughput performance of millimeter-wave wireless personal/local area network(mmWave WPAN/WLAN) systems. The upcoming mmWave WPAN/WLAN systems are designed to support high definition TV (HDTV) transmission, high speed wireless docking and gaming, etc. These data-rate-greedy applications require Gbits/s or even multi-Gbits/s transmission...
A scheme transmitting superposition coding (SC), which superimposes unicast data to multicast data, using opportunistic multicast scheduling (OMS) scheme, is proposed and its performance is evaluated and simulated in this paper. Although the scheme is a little weaker than traditional scheme using QPSK modulation method in bit error rate (BER) performance, its throughput and system time delay promote...
The system characteristics of time division duplex-long term evolution (TDD-LTE) system and different inter-cell interference coordination (ICIC) algorithms are analyzed. Dynamic TDD-LTE system level simulator based on OPNET software is established to investigate the system performances with and without the interference coordination algorithms. Simulation results indicate that adopting the interference...
This paper presents a resource allocation framework for the transmission of heterogeneous services in two-hop orthogonal frequency division multiplexing (OFDM) cooperative relay systems. An optimal adaptive power and subcarrier allocation scheme is proposed to maximize the system throughput while satisfying the quality of service (QoS) requirements of both the real-time (RT) and nonreal-time (NRT)...
In this paper a novel Weighted Proportional Fair (WPF) scheduling algorithm is proposed. Traditional Proportional Fair (PF) algorithm cannot exploit the inherent near-far diversity given by pathloss and cannot achieve maximum best-effort service utility under multicell scenario. WPF overcomes this deficiency. The weight value and weight factor are introduced to WPF which enable WPF utilizing near-far...
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