The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
For the next-generation mobile communication system, enlarging the system capacity by allowing the use of non-orthogonal user multiplexing has been suggested. In a downlink multicarrier non-orthogonal multiple access (NOMA) system, single or multiple users are allocated to each subband. In NOMA scheduling, a proportional fair (PF) algorithm, where users with few allocated resources are selected on...
The number of Machine to Machine (M2M) applications is increasing rapidly especially in cellular communication systems. These applications should support a very high number of stations (STAs) and facilitate communication without any human intervention. To fulfill these requirements random access protocols are a possible choice. Carrier sense multiple access collision avoidance (CSMA/CA) protocol with...
In a Non Uniform Memory Access (NUMA) system, I/O to a local device is more efficient than I/O to a remote device. A device connected to the same socket having the CPU and memory offers a closer proximity for I/O operations. Modern microprocessors also support on-chip I/O interconnects with which the processor may drive I/O to a local device from the processor cache, without the need to interact with...
Given that there are overgrowing demands for video streaming application in the downlink Long Term Evolution Advanced (LTE-A), effective scheduling of these delay-sensitive real-time packets are critical. However, there remains a challenge where (re)transmission of video packets in the downlink LTE-A may subject to numerous impairments including outdated Channel Quality Information (CQI) report. This...
Data collection and transmission are the fundamental operations of Wireless Sensor Networks (WSNs). A key challenge in effective data collection and transmission is to schedule and synchronize the activities of the nodes with the global clock. This paper proposes the Bandwidth Efficient Hybrid Synchronization Data Aggregation Algorithm (BESDA) using spanning tree mechanism (SPT). It uses static sink...
The latest 4G wireless technology, Long Term Evolution (LTE), is expected to be a promising wireless network for smart grid communications due to its high data rate and low delay. The needs of real time communications in the smart grid require reliable, confident and well tested wireless networks. Scheduling is one of the mechanisms which has a crucial role on the smart grid performance since it is...
In a dynamic access network, multiple secondary users access and share channels that are not used by the primary users. Uncoordinated and random channel access by the secondary users access leads to decreased secondary network throughput as users in the close proximity interfere with each other. In order to better utilize the channels, we propose a scheduling technique that assigns unique time slots...
The era of cloud based multimedia applications has lead to a huge increase in the no. of requests on cloud. The increased no. of requests on cloud leads to an increased workload, making workload balancing an important QoS Parameter. Workload Balancing also leads to a judicious use of resources like electricity etc. and thus promotes the concept of Green IT. The paper presents a new Load Balanced Resource...
Controlling the latency and throughput is a crucial part of designing an I/O scheduler that can provide guaranteed quality-of-service of a shared storage resource to multiple competing applications. Previously proposed I/O schedulers have mainly focused on ensuring proportional bandwidth allocation and a user-defined latency. However, the algorithms are not optimized for high-speed storage with restricted...
The SSD is adopted to improve the IO performanceof the storage system in the data center, the throughput allocation for clients is a challenging problem. We need to find a throughput allocation method, which can determine the throughput allocations of clients on each server, while both providing the fair allocations for clients and maximizing the utilization of system throughput resource in the entire...
This paper proposes a novel Resource Scheduling (RS) method by using Hybrid Broadcasting and Cellular Networks (HBCN). In this approach, the hot or common information is assigned with higher priority levels and is preferentially scheduled. The Equivalent Throughput (ET) and fairness are redefined and discussed. Simulations show the ETs of the networks are improved by using the proposed algorithms,...
Scheduling Bag-of-Tasks (BoT) applications on the cloud can be more challenging than grid and cluster environments. This is because a user may have a budgetary constraint or a deadline for executing the BoT application in order to keep the overall execution costs low. The research in this paper is motivated to investigate task scheduling on the cloud, given two hard constraints based on a user-defined...
Long Term Evolution (LTE) is the standard developed by the 3rd Generation Partnership Project (3GPP) to address the ITU's 4G requirements. For the first time, we have technology convergence in a generation of cellular communication systems. LTE promises data transmission of about 100 Mbps and its advanced version (LTE-A) goes even further with more than 1 Gbps in the downlink channel. Such very high...
In this paper, we consider an energy harvesting multiple access channel (MAC) where the transmitters are powered by energy harvested from the ambient environment. We assume that the energy harvesting processes at the transmitters can be modeled as independent Bernoulli processes with parameters λis, and the channel states between the transmitters and the receiver are independent Bernoulli processes...
LTE uplink has two major scheduling algorithms, namely, Best CQI (BCQI) algorithm and Proportional Fairness (PF) algorithm. PF algorithm provides less system throughput than BCQI algorithm, however, unlike BCQI algorithm it considers users with poor channel condition for allocation process. In this paper, a new scheduling algorithm called as Opportunistic Dual Metric (ODM) Scheduling Algorithm is...
This paper addresses the problem of joint routing and backhaul link scheduling in a dense small cell network using 60GHz multi-hop backhaul, coordinated by a local Cloud-RAN central unit. Our objective is to optimally select the backhaul links and paths to be activated in time domain to enhance the cell throughput and to minimize the total delay, considering the backhaul channel conditions and the...
Multi-processor systems-on-chips are widely adopted in implementing modern streaming applications to satisfy the ever increasing computing requirements. Predictable memory hierarchies, which make memory access predictable, can better satisfy the strict timing requirements of streaming applications. However, different levels of the memory hierarchy vary in latency and capacity. Hence, the system performance...
A new scheduling and link adaptation scheme is designed for a heterogeneous wireless network where a) different links are using the shared media with various throughput requirement based on their applications, b) links have different characteristics, c) various bit error rate constraints are to be considered at the receivers, d) based on the available power supplies different average transmission...
In this paper, we assess the performance gains of mobility on the downlink of cellular data networks. These gains are only due to the elastic nature of traffic and thus observed even under a blind, fair scheduling scheme: data are more likely transmitted when users are close to the base stations, in good radio conditions. This phenomenon is further amplified by opportunistic scheduling schemes that...
Reducing energy consumption over mobile networks and devices is an important and challenging issue. On the one hand, power is a limited resource on mobile devices and its usage should be optimized. On the other hand, energy consumption constitutes an important item within operating expenditure (OPEX) for network providers. In the literature, many studies are dedicated to evaluate scheduling mechanisms...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.