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Optimal resource allocation elegantly kaizens bandwidth utilization in present-day communications systems carrying distinctive traffic types with specific quality of service (QoS) requirements, whose fulfillment may elevate users' quality of Experience (QoE). This paper investigates the QoE of users running real-life real-time and delay-tolerant applications by implementing an Internet-connected real-world...
BLE based Accessory-Smartphone communication (WBANs/WPANs), used for health-care, infotainment and many other applications, usually operate in dynamic environment (varying number of sensors, wireless conditions, etc.). These devices are typically configured in connection-oriented hub-and-spoke model with the Master controller. With an end-objective of optimizing the capacity of BLE (Bluetooth Low...
Cloud based datacenters will be most suitable candidates for future software defined networking. The QoS requirements for shared data centers, hosting diverse applications could be successfully achieved through SDN architecture. This paper provides an extension of our previously proposed scheme QAMO that was aimed at achieving tangible QoS in datacenters through controlling bandwidth reservation in...
IEEE 802.11e is an extension for media access control in wireless network. It is used for different Quality of Service requirement for different transmission application. But it assumes that all terminals operate in the same transmission speed. But when terminals use different transmission speeds, the access mechanism, EDCA, can not perform to its design purposes. Because the parameters designed for...
Device-to-Device (D2D) communication assisted with relay transmission could efficiently optimize the system performance when D2D users are too far away from each other. In this paper, considering the individual QoS requirements, we propose a cross-layer relay selection algorithm which combines channel state information (CSI) at physical layer with queue state information (QSI) of buffer for each relay...
Diff Serv network architecture is the first choice for QoS of network. As a network buffer resource management, active queue management is the key technology to differentiated services. On the basis of the RIO-C (RED with IN/OUT and couple queue), this paper proposes a queue management algorithm INRIO-C (Improved nonlinear RIO-C). This algorithm takes nonlinear characteristics between the average...
Nowadays, LTE-based femtocell technology is a promising solution offering high-speed services, enhanced indoor coverage and increased system capacity. In such multi-user wireless communication systems, intelligently allocating resources is the substantial aim towards interference mitigation and enhancing power and spectral efficiencies. In this paper, we propose a joint power and channel allocation...
The growth of new advanced services over Internet, including HD and 4K unicast video, made possible by the development of fixed and mobile broadband and ultra-broadband access, in turn poses important requirements on the evolution of IP transport networks. Sustainability of the Internet ecosystem in the presence of increasing traffic volumes, changing traffic patterns and more demanding application...
This work experimentally demonstrates how to control and manage user Quality of Service (QoS) by acting on the switching on-off of the optical Gigabit Ethernet (GbE) interfaces in a wide area network test bed including routers and GPON accesses. The QoS is monitored at the user location by means of active probes developed in the framework of the FP7 MPLANE project. The network topology is managed...
The packet scheduling problem has been deeply studied for lot of years by researchers in the computer science and telecommunications fields as an important solution that decides the order in which packets are sent over a link in order to provide QoS on a network. Recently, the packet scheduling has become again a challenging topic due to the massive use of wireless technologies (e.g. WiFi, LTE, 4G/5G),...
This paper evaluates the quality of service (QoS) in Wi-Fi networks considering medium access control algorithms. It provides the wireless local area networks (WLAN) traffic analysis based on hotspot statistics. It also studies the distribution of physical layer frame arrival time and channel utilization time. The results show the presence of self-similar distribution dramatically influencing the...
Mobile network traffic has grown exponentially in recent years, and it is expected that this trend will continue in the future. Important driving forces include new affordable smartphones, and the many new connected devices on the market. Also, the rollout of faster HSPA+ and LTE networks is expected to improve the customer experience. Therefore, the efficient management of the expected huge data...
Device-to-device (D2D) communications as an underlay of a LTE-A (4G) network can reduce the traffic load as well as power consumption in cellular networks by way of utilizing peer-to-peer links for users in proximity of each other. This would enable other cellular users to increment their traffic, and the aggregate traffic for all users can be significantly increased without requiring additional spectrum...
New sophisticated solutions are required in next generation networks to provide appropriate quality of service for users. The introduction of small cells in Long Term Evolution (LTE) raises numerous problems along with undoubted advantages to the engineers and researchers. In this paper a new handover decision algorithm is described for two-tier macrocell-small cell LTE-Advanced (LTE-A) using network...
To enhance the QoS performance in saturated multihop adhoc networks, it is essential to have cooperative algorithms for MAC layer contention resolution and TCP layer congestion control. This paper proposes a cross layer approach that modifies the back off mechanism and congestion control technique using Fibonacci sequence. Due to the golden section property of Fibonacci sequence, contention and congestion...
Access Point (AP) selection in WiFi hotspots is driven by stations and it is based on the measured strongest RSSI (Received Signal Strength Indicator) level: any station connects to the AP that provides the higher physical data rate. Although simple and effective in low crowded scenarios with low-medium traffic load, this strategy performs inefficiently when the number of mobile users is high and...
The performance management is specified Quality of services (QoS) parameters is throughput, jitter, packet loss and delay. Network performance (NP) is very challenging to predict and guarantee in QoS performance because many service and applications rapidly increased. From that, Broadband wired assessment was conducted among 5 regions in Malaysia with 25 locations. Assessment is to benchmarking network...
In this paper we propose a utility-based scheduling mechanism for mixed traffic in wireless networks to mitigate the problem that current scheduling algorithms cannot have a good performance in mixed traffic. The proposed algorithm called UBSA (Utility-Based Scheduling Algorithm) works in wired-wireless hybrid networks. Packets of diverse QoS (Quality of Service) classes are allocated to different...
As the wireless medium is becoming more and more congested, a better use of the scarce frequency spectrum is needed to deliver the required Quality of Service (QoS) to clients. Especially in unlicensed bands, wireless systems suffer from intra-network interference [1], e.g., in professional wireless conferencing environments [2]. Therefore, cognitive solutions are being developed, both on radio and...
We study the resource scheduling for Wireless Sensor Network (WSN) based on Single Carrier Frequency Division Multiple Access (SC-FDMA) technique. This work distinguishes itself from the existing work in: 1) the scheduling for a relay network, 2) the scheduling for multimedia-enabled sensor nodes taking into account diverse QoS characteristics such as delay sensitive (DS), rate sensitive (RS), best...
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