scholarly journals QoE-Aware Scheduling Algorithm for Adaptive HTTP Video Delivery in Wireless Networks

2018 ◽  
Vol 2018 ◽  
pp. 1-16 ◽  
Author(s):  
Frederico Rodrigues ◽  
Ivo Sousa ◽  
Maria Paula Queluz ◽  
António Rodrigues
Keyword(s):  
Wireless Networks ◽  
Radio Channel ◽  
Scheduling Algorithm ◽  
Mobile Network ◽  
Network Capacity ◽  
Superior Performance ◽  
Radio Resources ◽  
Streaming Services ◽  
Client Side

In the last years, the video content consumed by mobile users has increased exponentially. Since mobile network capacity cannot be increased as fast as required, it is crucial to develop intelligent schedulers that allocate radio resources very efficiently and are able to provide a high Quality of Experience (QoE) to most of the users. This paper proposes a new and effective scheduling solution—the Maximum Buffer Filling (MBF) algorithm—which aims to increase the number of satisfied users in video streaming services provided by wireless networks. The MBF algorithm uses the current buffer level at the client side and the radio channel conditions, which are reported to the network by the client, as well as the bitrate of the requested video segment. The proposed scheduling strategy can also fulfill different satisfaction criteria, since it can be tuned to maximize the numbers of users with high QoE levels or to minimize the number of users with low QoE levels. A simulation framework was developed, considering a Long Term Evolution (LTE) scenario, in order to assess the performance of the proposed scheduling scheme and to compare it with other well-known scheduling solutions. The results show the superior performance achieved by the proposed technique, in terms of the number of satisfied and unsatisfied users.

scholarly journals Urban Air Mobility—A 6G Use Case?

2021 ◽  
Vol 2 ◽  
Author(s):  
Shuja Ansari ◽  
Ahmad Taha ◽  
Kia Dashtipour ◽  
Yusuf Sambo ◽  
Qammer H. Abbasi ◽  
...  
Keyword(s):  
Wireless Networks ◽  
Performance Indicators ◽  
Mobile Network ◽  
Key Performance Indicators ◽  
Network Capacity ◽  
Base Station ◽  
Transport Systems ◽  
Urban Air ◽  
Aerial Vehicles ◽  
Aerial Transport

The increasing popularity of Unmanned Aerial Vehicles (UAV) has resulted in exponential growth of the market owing to numerous applications that have been facilitated by advances in battery technology and wireless communications. Given the successes of UAVs thus far, researchers are already gearing towards aerial transport systems that consist of dense deployment of both UAVs and Personal Aerial Vehicles (PAVs) with human passengers. Although the fifth-generation mobile network (5G) key performance indicators have been optimised to support drone use cases for both high data rates and low latency applications, future aerial transport systems will require stricter network key performance indicators to support the expected massive deployment of aerial vehicles taking into account network capacity and distance between the base station and the aerial vehicles, among others. In this article, we present our perspective, vision, architecture, requirements and key performance indicators for future aerial wireless networks supported by 6G for Urban Air Mobility (UAM). Furthermore, we review key enabling technologies and discuss future challenges for incorporating aerial wireless networks in 6G.

scholarly journals Hardware simulation for exponential blind equal throughput algorithm using system generator

2019 ◽  
Vol 9 (1) ◽  
pp. 170
Author(s):  
Yusmardiah Yusuf ◽  
Darmawaty Mohd Ali ◽  
Norsuzila Ya’acob
Keyword(s):  
Real Time ◽  
Scheduling Algorithm ◽  
Base Station ◽  
System Generator ◽  
Channel Quality ◽  
Term Evolution ◽  
Long Time ◽  
Radio Resources ◽  
System Verification

Scheduling mechanism is the process of allocating radio resources to User Equipment (UE) that transmits different flows at the same time. It is performed by the scheduling algorithm implemented in the Long Term Evolution base station, Evolved Node B. Normally, most of the proposed algorithms are not focusing on handling the real-time and non-real-time traffics simultaneously. Thus, UE with bad channel quality may starve due to no resources allocated for quite a long time. To solve the problems, Exponential Blind Equal Throughput (EXP-BET) algorithm is proposed. User with the highest priority metrics is allocated the resources firstly which is calculated using the EXP-BET metric equation. This study investigates the implementation of the EXP-BET scheduling algorithm on the FPGA platform. The metric equation of the EXP-BET is modelled and simulated using System Generator. This design has utilized only 10% of available resources on FPGA. Fixed numbers are used for all the input to the scheduler. The system verification is performed by simulating the hardware co-simulation for the metric value of the EXP-BET metric algorithm. The output from the hardware co-simulation showed that the metric values of EXP-BET produce similar results to the Simulink environment.  Thus, the algorithm is ready for prototyping and Virtex-6 FPGA is chosen as the platform.

scholarly journals Transport Network Capacity Planning And Analysis Operator X Using Overbooking Method In Jombang Rawa Area

2018 ◽  
Vol 19 (1) ◽  
pp. 29
Author(s):  
Erna Temmerman Simanihuruk
Keyword(s):  
Capacity Planning ◽  
High Speed ◽  
Mobile Network ◽  
Network Capacity ◽  
Transport Network ◽  
Communication Services ◽  
Traffic Capacity ◽  
Bandwidth Capacity

The high quality of high-speed communication services is now a requirement for LTE (Long Term Evolution) users, resulting in high traffic capacity requirements. Jombang Rawa area is one area that has a high traffic capacity. To overcome this problem, X operator rolled out a mobile network project called roll out project that aims to provide sufficient LTE network capacity for operator X customers. In the project, the capacity of the transport network is done using a microwave backhaul which aims to support the new LTE site so that there is no bandwidth shortage in the new site path. The method used to obtain the appropriate traffic for the new site path is the overbooking calculation method. Based on Overbooking calculations of 102 sites, there are 22 sites that require a propose bandwidth capacity solution. Using the overbooking method there is a configuration upgrade as a solution to deal with trafficked paths. 

scholarly journals A Prioritized Load Aware Weighted Round Robin (PLAWRR) algorithm in Broadband Wireless Networks

2019 ◽  
Vol 3 (4) ◽  
Author(s):  
Ibrahim Saidu ◽  
Nasir Aliyu Shinkafi ◽  
Abubakar Roko ◽  
A. U. Moyi
Keyword(s):  
Wireless Networks ◽  
Packet Loss ◽  
High Speed ◽  
Scheduling Algorithm ◽  
Round Robin ◽  
Traffic Load ◽  
Superior Performance ◽  
Network Resources ◽  
Broadband Wireless ◽  
Heterogeneous Service

Broadband Wireless networks (BWNs) provide a reliable internet access for the delivery of high-speed multimedia applications. The BWNs such as WiMAX provides quality of service (QoS) support for heterogeneous service classes with diverse QoS requirements. Scheduling algorithm is one of the mechanisms used to assure QoS. The existing scheduling algorithm uses a priority value to prioritize traffics according to varying traffic conditions. However, it wastes network resources due to failure to consider channel conditions; thus, lead to increase in delay and packet loss as well as decrease in throughput. In this paper, a prioritized load aware weighted round robin (PLAWRR) algorithm is proposed to improve resource utilization. The PLAWRR algorithm employs a modified value priority according to not only traffic load but also channel condition and throughput history for traffics prioritization. It also introduces a new dynamic weight according to the prioritization value. The performance of the proposed algorithm is evaluated using simulations. The results show that the proposed PLAWRR achieves superior performance compared to the existing algorithm in terms of delay and packet loss as well as increase in throughput.

Measuring Long Term Superior Performance: Or How to Compare Apples with Oranges

2008 ◽  
Author(s):  
George S. Yip ◽  
Timothy M. Devinney ◽  
Gerry Johnson
Keyword(s):  
Superior Performance

scholarly journals An Optical Fiber Sensor Based on La2O2S:Eu Scintillator for Detecting Ultraviolet Radiation in Real-Time

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3754 ◽  
Author(s):  
Yongji Yan ◽  
Xu Zhang ◽  
Haopeng Li ◽  
Yu Ma ◽  
Tianci Xie ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Response Time ◽  
Electromagnetic Interference ◽  
Uv Light ◽  
Optical Fiber Sensor ◽  
Temperature Response ◽  
Superior Performance ◽  
Fiber Sensor ◽  
Uv Detectors

A novel ultraviolet (UV) optical fiber sensor (UVOFS) based on the scintillating material La2O2S:Eu has been designed, tested, and its performance compared with other scintillating materials and other conventional UV detectors. The UVOFS is based on PMMA (polymethyl methacrylate) optical fiber which includes a scintillating material. Scintillating materials provide a unique opportunity to measure UV light intensity even in the presence of strong electromagnetic interference. Five scintillating materials were compared in order to select the most appropriate one for the UVOFS. The characteristics of the sensor are reported, including a highly linear response to radiation intensity, reproducibility, temperature response, and response time (to pulsed light) based on emission from a UV source (UV fluorescence tube) centered on a wavelength of 308 nm. A direct comparison with the commercially available semiconductor-based UV sensor proves the UVOFS of this investigation shows superior performance in terms of accuracy, long-term reliability, response time and linearity.

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