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Aiming at meeting the application requirements of low time delay and packet lose rate of wireless HD video PAN, an Video Point Coordination Function (VPCF) mechanism for MAC layer scheduling based on IEEE 802.11 PCF is proposed in this paper. TSP service periods are allocated to video station, which has burst video frames to transfer, and the number of needed CBAP (Slot Period Transmission), is evaluated...
The development of telehaptic communication protocols has gained widespread focus over the past decade. Several protocols have been proposed for carrying out telehaptic activities over a shared network. However, a comprehensive analysis of the impact of the network crosstraffic on the telehaptic stream, and the feasibility of Quality of Service (QoS) compliance, is lacking in the literature. In this...
This paper compares congestion controls of Multi-Path TCP (MPTCP) from a view point of Quality of Experience for Web services (Web-QoE) under heterogeneous environment; it assesses Web-QoE by experiments with subjects. The authors treat the four controls (LIA, OLIA, BALIA, WVEGAS) and evaluate Web-QoE by using Web usability. In addition to QoE, they also measure QoS and fairness. Their experiments...
In this paper, we evaluate QoS (Quality of Service) and QoE (Quality of Experience) characteristics of 2K and 4K video distribution using MPEG-DASH (Dynamic Adaptive Streaming over HTTP). Evaluation results conclude that smaller playout buffer size contributes to QoE improvement.
Network Function Virtualization is an emerging paradigm to allow the creation, at software level, of complex network services by composing simpler ones. However, this paradigm shift exposes network services to faults and bottlenecks in the complex software virtualization infrastructure they rely on. Thus, NFV services require effective anomaly detection systems to detect the occurrence of network...
In order to optimize power consumption in the network, techniques to adjust the link capacity to the demand has been proposed recently. These techniques are known as Adaptive Link Rate (ALR). This paper proposes that is feasible to establish an appropriate link rate to transport one or more flows efficiently, in terms of power consumption without impacting performance, in a network with a limited...
In a world of the global communications, with continuous expansion to new horizons, which requires anytime and anywhere access to information sources, the need to manage the communication requirements is a very important issue. Traditional IP networks are facing difficulties in ensuring, to a user, a specific bandwidth[1] level for network access. Related to this matter, in this article we are proposing...
With the rapid development of the Internet, especially in recent years, the development of mobile Internet is increasingly rapid. Message push, which is an important way for mobile client to publish information and make communication, plays a significant role in mobile Internet. MQTT protocol is one of the implementation technologies of message push in Android system with low power consumption and...
The standard and real-time communication technology is an unalloyed inevitability for the development of Internet of Things (IoT) applications. However, the selection of a standard and effective messaging protocol is a challenging and daunting task for any organisation because it depends on the nature of the IoT system and its messaging requirements. Copious messaging protocols have been developed...
In this paper a physical layer transmission method based on the channel prediction and users quality-of-service(QoS) is proposed. The time-varying Rayleigh fading channel is predicted by back propagation neural network (BPNN), which will serve as judging whether the system secure transmission capacity is redundant. Then a scheme to choose the best physical layer security coding under the secure transmission...
Most of IoT applications include large number of distributed sensors which are interesting in specific geographical area. A large number of IoT entities have multiple relations and dynamic connections with each other. And there are many group communication requirements. Flexible multicast mechanism will be essential in such environments but it is difficult to satisfy verious requirements by means...
This paper studies appropriate values of EDCA parameters of the author's wireless LAN base station based on Quality of Experience (QoE) for Web Services by experiments with subjects. The base station reduces the traffic of a Web service without degradation of QoE; it utilizes EDCA as QoS control. However, appropriate EDCA parameter value have never been studied. This paper evaluates QoE and measures...
This paper proposes a radio resource management scheme for the multi-RAT (Multiple Radio Access Technology) unit based MHN-E (Mobile Hotspot Network Enhancement) network that provides a millimeter-wave (mmWave) backhaul link of high-speed railway communications. We designed when multi-RAT unit configuration procedure is triggered and how it works, also explained detailed multi-RAT unit bearer configuration...
We consider a full-duplex (FD) system where the uplink (UL) and downlink (DL) users are simultaneously served in the same bandwidth. We propose a new design that incorporates the power allocation for UL users and a joint beamforming and non-orthogonal multiple access for DL users under the effects of both residual self-interference and cochannel interference. In particular, a sum rate maximization...
The quality of service multicast routing problem (QoSMRP) is a very interesting research issue for transmission in communication networks. It is known to be an NP-hard problem, so many heuristic algorithms have been employed for solving this problem. This paper proposes two hybrid approaches based on the hybridization of Firefly algorithm (FA) with Quantum Evolutionary algorithm (QEA) to solve the...
Vehicular ad hoc network (VANET) is a particular class of mobile ad hoc network (MANET) that utilizes moving cars as nodes to establish wireless communications and exchange information between them without the need of infrastructure. VANET is a promising technology used to provide safety, efficiency, and comfort to the road users. Routing protocol has become one of the most challenging tasks for VANET...
This article presents a platform combining hardware and software for smart power consumption monitoring, controlling, and planning in urban scenarios. The system integrates a hardware controller for energy efficiency, a communication protocol to improve data transmission, and a software module for planning and managing home devices. The proposed solution is implemented applying Internet of Things...
In this work, we model route updates as part of Quality of Service (QoS) Virtual Network Function (VNF) in Software-Defined Networking (SDN) architecture. In SDN, the control plane and the data plane are decoupled. This allows high flexibility by providing abstractions for network management applications and being directly programmable. However, reconfiguration and updates of a network are sometimes...
The thriving success of the Cloud Industry greatly relies on the fact that virtual resources are as good as bare metal resources when it comes to ensuring a given level of quality of service. Thanks to the isolation provided by virtualisation techniques based on hypervisors, a big physical resource can be spatially multiplexed into smaller virtual resources which are easier to sell. Unfortunately,...
Ego-network concept has been systematically studied, since this kind of network employs only locally available information to analyze its structure. Degree, closeness, and betweenness are widely studied centrality measures. Among the three measures presented, betweenness centrality in ego-networks is the most used in several fields such as Wireless Mesh Networks, Wireless Sensor Networks, and Delay...
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