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In this paper, we study the uplink (UL) and downlink (DL) ergodic capacity in the bidirectional dynamic network (BDN). By dynamically allocating the numbers of UL and DL remote radio heads (RRHs), BDN facilitates simultaneous UL and DL communications to accommodate the data traffic asymmetry. Assuming that the number of antennas at each RRH (M) is large, we derive the closed-form expressions for the...
Opportunistic Network has become an international hotspot in according with the popularity of various mobile intelligent terminals. But the nodes with limited communication capabilities cannot satisfy the growing of large content data transmission. Aim to these issues, we propose a novel communication capacity calculation model of Opportunistic Network based on the classical Random Direction mobile...
In recent years, as mobile devices increase, the demands for measuring the available bandwidth in a wireless network increase more and more to provide high quality network services. The available bandwidth is one of the most important parameters to determine the sending rate in WAN optimization. Pathload [2] is a technique to measure the available bandwidth by detecting the point where the receiving...
Cloud Radio Access Network (C-RAN) is a novel mobile network architecture which can solve lots of challenges in the next generation mobile communication system, including the demand for higher energy efficiency(EE). In C-RAN EE research field, most of recent work focuses on systematic energy saving and ignores the needs of users. To improve the performance of C-RAN under fronthaul capacity constraint,...
Due to the fluctuation of the bandwidth consumption of mobile users, the availability of a more flexible bandwidth pricing structure becomes important. Unfortunately, most mobile service providers only offer long-term contracts. Hence, wireless bandwidth sharing has a potential to become a niche market. In this paper, we propose the pay-per-second model, in which the price is based on the mobile net...
As the mobile communication systems develop from 2G to 3G, people require a uniform-spectrum, uniform-architecture. Software radio provides a key solution to the interconnection of various communication architectures and radio standards with different spectrum, poor cooperation capability and so on. Sample rate conversion based software radio is a key technology to implement the interconnection. According...
Organizational issues of the backhaul network using Long Term Evolution technology are considered. Backhaul connections for different network segments are analyzed. A model of the backhaul network using Multiprotocol Label Switching technology is proposed to form the transport basis for existing networks. The bandwidth and transporting performance of the network is estimated.
HTTP-based adaptive protocols dominate today's video streaming over the Internet, and operate using multiple quality levels that video players request one segment at a time. Despite their popularity, studies have shown that performance of video streams still suffers from stalls, quality switches and startup delay. In wireless networks, it is well-known that high variability in network bandwidth affects...
A large part of the data transmitted over the Internet today consists of video streaming services, mainly due to the growth of services like Youtube, Skype or WebEx. The need for an adaptive video stream arose as a mobile robot with real-time video streaming capability has been developed. ARC-ROVER is a robot that could connect to the Internet via 3G technology, and that could be controlled over the...
This paper proposes an efficient round-robin-based resource scheduling method performed over both the licensed and unlicensed bands in device-to-device-enabled cellular networks. Simulation results demonstrate that, in terms of the average transmission rate and the blocking ratio, the proposed method is superior to the conventional method.
Mobile Edge Computing (MEC) provides mobile and cloud computing capabilities within the access network. Network Functions Virtualization (NFV) leverages standard IT Virtualization technology to decouple the network functions from the underlying physical infrastructure. Basing on the ICT demand, MEC can be consolidated into NFV, as a network element within access network. This paper presents an architecture...
This paper presents a new mechanism for data transmission over mobile networks. The ultimate goal of designing the next generation mobile network is to have a single network that can support all applications with different data attributes. The proposed mechanism in this paper is inspired by the Mechanism Design Theory that is an emerging branch of game theory and has been used successfully in economics...
The fast pace of innovation in mobile systems is pushing tomorrow's performance level in yesterday's power and area envelope, enabling mobile and embedded devices to support features that were once available only in the realm of desktop computing. In addition, a new debate on hardware-based security and virtualization is taking the mobile industry by stormand impacting many adjacent markets, including...
In the challenging world of mobile devices, there is a huge need for satisfying the requests of millions of mobile users in a single response. Wireless data broadcasting is the most suitable way of disseminating public information to a number of mobile users. The way of disseminating information must be energy and latency efficient enough so that it can cope with the limitations of a mobile device...
We study in this work user impatience by adopting a realistic realization: a user gets impatient when its throughput falls below a certain threshold for a given patience duration. We model such a behavior in a cellular network, transporting elastic flows, for a realistic user configuration with random arrivals, following a Poisson process, and departure after a finite duration, either upon transfer...
Software-defined networking (SDN) and in-network caching are promising technologies in next generation wireless networks. In this paper, motivated by the flow control in SDN, we propose an approach to solve bandwidth provisioning problem in software-defined mobile networks (SDMNs) with jointly considering in-network cache under uncertain flow rate. We present a flow control problem supporting bandwidth...
In this paper, we propose a vertical handover decision algorithm. This algorithm executes the vertical handover based on several network criteria like the network delay, the available bandwidth, the received signal strength, etc. Fuzzy logic system was used to implement the handover initiation module while utility function was chosen for the network selection module. We compare our proposed algorithm...
We experimentally demonstrates a VLC downlink based on two LEDs and one mobile user. A self-adaptive STBC is proposed in this work to suppress the interference between VLC nodes, resulting in a significant mobile feasibility.
We propose a novel low-cost, spectrum efficient mobile fronthaul architecture for spatial densification. For the first time, bi-directional mobile data services following 3GPP release-12/13 standards are delivered using only low-cost colorless WRC-FPLDs in RRHs.
We improve the C-RAN architecture for supporting high-speed railway communication. Results show that the improved architecture significantly reduces the bandwidth consumption brought by base station coordination and achieves higher system capacity.
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