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With the emergence of 3D mobile and VR devices, mobile 3D video services are becoming increasingly important for video service providers, such as Youtube and Netflix, while multi-view 3D videos have the potential to inspire a variety of innovative applications. However, enabling multi- view 3D video services may overwhelm WiFi networks when every view of a video are multicasted. In this paper, therefore,...
This paper studies a wireless network consisting of multiple transmitter-receiver pairs sharing the same spectrum where interference is regarded as noise. Previously, the throughput region of such a network was characterized for either one time slot or an infinite time horizon. This work aims to close the gap by investigating the throughput region for transmissions over a finite time horizon. We derive...
The mismatch between user demand and service supply creates a congestion in mobile wireless networks. The literature has a strong evidence that user behavior is highly predictable. Taking advantage of user demand predictability allows the carrier to apply proactive caching in order to smooth out the network load. Moreover, harnessing the information about user mobility enhances carrier's caching decision...
Optimization of resource allocation is fundamental to implement orthogonal frequency division multiple access (OFDMA), which energy efficiency (EE) is very much desired. Wireless network virtualization recently emerges to flexibly enable high data rate services, but optimal cross-layer design with OFDMA remains open. While energy efficiency (EE) is a critical issue for OFDMA systems, the appropriate...
Heterogeneous wireless networks (HetNets) provide a powerful approach to meet the dramatic mobile traffic growth, but also impose a significant challenge on backhaul. Caching and multicasting at macro and pico base stations (BSs) are two promising methods to support massive content delivery and reduce backhaul load in HetNets. In this paper, we jointly consider caching and multicasting in a large-scale...
Transitional Region Phenomenon leads to the existence of lossy links in wireless networks, which results in a transmission between two users who are theoretically connected under the Deterministic Network Model cannot be guaranteed. Therefore, we focus on a more practical network model - Probabilistic Network Model (PNM) which can better characterize the lossy links in wireless networks. To be specific,...
The correlation of interference has been well quantified in Poisson networks where the interferers are independent of each other. However, there exists dependence among the base stations (BSs) in wireless networks. In view of this, we study the interference correlation in non-Poisson networks where the interferers are distributed as a Matern cluster process (MCP) and a second-order cluster process...
This paper investigates the secrecy connectivity probability for wireless networks with transmit antenna selection in the presence of randomly located eavesdroppers. Firstly, we propose an antenna selection scheme for use at the base station with a half-duplex receiver to enhance secrecy connectivity performance. Then in order to further improve the secrecy connectivity, a full-duplex (FD) receiver,...
Caching at base stations (BSs) is a promising way to offload traffic and eliminate backhaul bottleneck in heterogeneous networks (HetNets). In this paper, we investigate the optimal content placement maximizing the successful offloading probability in a cache- enabled HetNet where a tier of multi-antenna macro BSs (MBSs) is overlaid with a tier of helpers with caches. Based on probabilistic caching...
With the explosive development of social networks, users' behaviors are prone to be socially connected. Social Network Operator (SNO) can effectively collect communication data which reflects users' social behaviors and construct a social graph which precisely characterize relationship among users. Users who exert online influence on their friends can potentially affect their friends' demand for wireless...
Machine-to-machine (M2M) communications have attracted great attention from both academia and industry. In this paper, with recent advances in wireless network virtualization and software- defined networking (SDN), we propose a novel framework for M2M communications in software- defined cellular networks with wireless network virtualization. In the proposed framework, according to different functions...
In this paper, we address a power-efficient resource allocation problem in virtualized wireless networks (VWNs) using non-orthogonal multiple access (NOMA). In this set-up, the resources of one base station (BS) are shared among different service providers (slices), where the minimum reserved rate is considered for each slice for guaranteeing their isolation. The formulated resource allocation problem...
Heterogenous wireless networks (Hetnets) provide a powerful approach to meet the massive growth in traffic demands, but also impose a significant challenge on backhaul. Caching at small base stations (BSs) and wireless small cell backhaul have been proposed as attractive solutions to address this new challenge. In this paper, we consider the optimal caching and user association to minimize the total...
This work studies the problems of feedback allocation and scheduling for a multichannel downlink cellular network under limited and delayed feedback. We consider a realistic scenario where a fixed and small number of link states can be reported to the base- station (BS) per time-slot. We study the trade- off between knowing at the BS a small number of accurate link states (i.e. that can be...
To meet the ever-increasing demands on higher throughput and better network delay performance, 60 GHZ networking is proposed as a promising solution for the next generation of wireless communications. To successfully deploy such networks, its important to understand their performance first. However, due to the unique fading characteristic of the 60 GHz channel, the characterization of the corresponding...
Wireless network virtualization has emerged as a promising technology to provide a variety of services and applications for future wireless network as by enabling a more effective exploitation of network resources. In a mobile virtual network (MVN), both infrastructure provider (InP) and service provider (SP) must have a complementary relationship, as their revenues are mutually dependent. The trading...
When social behaviors are considered into ad hoc wireless networks, the users prefer to forward the traffic from their social contacts. In this way, the network capacity is highly related with the social characteristics. To this end, we apply a social contact based wireless network model and explore its throughput capacity. The wireless network capacity will get improved when the contacts are located...
One of the main challenges on the next generation local wireless networks lies in providing scalable media access control protocols in order to support the predicted high density. Research results have indicated that the current backoff mechanism is ineffective for dense networks, even more under the foreseen growing charge for the next five years. This paper investigates the proposal of the contention...
The worldwide mobile traffic is growing rapidly and more than 90% of the internet traffic relies on the Transmission Control Protocol (TCP) protocol, which is known to have a poor performance over unreliable wireless networks. One of the promising TCP enhancement mechanisms that are being considered by the wireless network operators is the Split-TCP. It is also quite well known that the Split-TCP...
Wireless network virtualization has emerged as a promising technology to provide multifarious services and applications for future wireless networks due to its efficient exploitation of network resources. In a mobile virtual network (MVN), a network operator (NO) benefits from leasing physical resources, such as subcarriers, to multiple service providers (SPs), whom then make profits from offering...
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