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As (M2M) Machine-To-Machine, communication continues to grow rapidly, a full study on overload control approach to manage the data and signaling of H2H traffic from massive MTC devices is required. In this paper, a new M2M resource-scheduling algorithm for Long Term Evolution (LTE) is proposed. It provides Quality of Service (QoS) guarantee to Guaranteed Bit Rate (GBR) services, we set priorities...
We define the concept of degree of schedulability to characterize the schedulability and performance of soft real-time systems. The degree of schedulability of a system is given in terms of the two factors 1) Percentage of Missed Dead- lines (PoMD); and 2) Degradation of the Quality of Service (DoQoS). Our work is set as a model-based framework for hierarchical scheduling systems where we introduce...
In this paper, we consider a coordinated multipoint (CoMP) dynamic cell selection (DCS) scheme in order to improve performances of sleeping cell users. According to this DCS, packets for user equipments (UEs) in a sleeping cell are randomly forwarded to the potential active base stations (BSs) by the packet serving gateway (PSG) and UEs in the sleeping cell dynamically select these active BSs to be...
The fast-developing services in internet pose challenges to the efficient transmission of various types of data, so an effective packet scheduling scheme is needed to meet the Qos constraints of heterogeneous services. In this article, the priority-queuing model is used to study the performances of various strategies based on delay sensitivity and packets length. And the non-preemptive short-packet-first...
For scheduling services with different features and Qos constraints, this paper proposes a hybrid scheduling strategy, in which delay-sensitive services are granted preemptive priority and non-delay-sensitive services are granted non-preemptive priority. Theoretical analysis verified that preemptive scheme results in longer waiting length of queue.
Currently, DiffServ is still evolving, the definition of the model has not yet finalized, and DiffServ implementation of IP QoS Assurance is still at the stage of experiments and research. The biggest problem exists in DiffServ is how to provide users with the services of different properties of the number and hierarchical distinction, at the same time there is multicast to achieve more complex and...
The existing IEEE 802.16 is a series of Wireless Broadband standards known as WiMAX as an important technology for providing high-speed Internet access to home and business subscribers in a wide area cellular network. It has defined real time and non-real time services. But the standard does not specify transmission scheduling schemes to support the services. In order to support the delay sensitive...
This paper proposes a new scheduling algorithm for IEEE 802.16-2005 Broadband Wireless Metropolitan Area Networks in TDD mode. The proposed algorithm focuses on solving the problem of handling high priority traffic in congested networks while minimizing starvation conditions for other served classes. In this work, a detailed simulation study is carried out for the proposed scheduling algorithm as...
The aim of this work is to use simulation and queueing theory to analyze the current status of the check-in process in an airport and identifying ways to improve its performance. In applications involving stochastic events, demand cannot be determined explicitly beforehand. For those applications, computer simulation is often used to predict resource demands. Queueing results provided a first order...
In IEEE 802.11e, a centralized polling based channel access mechanism is provided for the quality-of-service (QoS) provision of real-time applications. In order to improve bandwidth efficiency of polling for uplink variable bit rate (VBR) sources, it has previously been proposed in, e.g., ARROW, that the amount of backlogged traffic is fed back for exact bandwidth allocation. However, due to that...
The paper analyses the load imbalance problem and the QoS-based fault-tolerant scheduling algorithm in Grid Resource Scheduling, and proposes a new scheduling algorithm based on the priority of a task-based parameters of Qos constrained scheduling strategy. The method is based on using the generalized stochastic Petri nets with inhibitor arc to establish the grid scheduling model and improve the Min-Min...
This paper proposes a new scheduling algorithm for IEEE 802.16-2005 Broadband Wireless Metropolitan Area Networks in TDD mode. The proposed algorithm focuses on solving the problem of handling high priority traffic in congested networks while minimizing starvation conditions for other served classes. In this work, a detailed simulation study is carried out for the proposed scheduling algorithm as...
We study the problem of multiple packet bundling in multi-carrier cellular networks for VoIP and data traffic. In a time-slotted system such as the cdma2000 1xEV-DO downlink, part of a time-slot may not be fully utilized, if the packet sizes are small, as in the case of real-time VoIP traffic. Packet bundling can alleviate such a problem by sharing a time slot among multiple users, as proposed in...
In this paper, based on analyzing the two existing queue scheduling algorithms WRR and DWRR, an improved scheduling algorithm, called DWRR+, is presented, which is the resolution for the fairness of bandwidth allocation of the WRR algorithm. The ns-2 simulations show that the improved scheduling algorithm not only offers the service of the minimum guaranteed bandwidth but also implements the fair...
Energy efficiency is of critical importance in future wireless communication systems where networked low-power devices relying on batteries should be able to communicate transparently. We present a novel cross-layer energy-adaptive scheduling and queue management framework EAED (Energy Aware Early Detection) for minimizing energy consumption in WLAN mesh networks. EAED aims at saving energy by delaying...
In a service-oriented architecture, how to analyze the feasibility of service composition according to the requirements of service consumers has become a problem that must be solved in service composition. A method for analyzing feasibility of requirement driven service composition is proposed. Based on the support function at different stages in the lifecycle of service composition, the composition...
The provisioning of fairness among various networking and communication applications is an important quality-of-service (QoS) demand and becomes a challenging research topic. Deficit Round Robin (DRR) is a promising fair scheduling mechanism owing to its low complexity and excellent ability of achieving a good degree of fairness in terms of throughput. Although self-similar traffic has been found...
Providing quality of service in broadband wireless access systems is an important issue. Fair throughput scheduling is one scheduling algorithm that is able to guarantee equal throughput in the long term for all users within one cell by allocating a resource to the user with the lowest throughput averaged over a past interval. The throughput that can be obtained by a user depends on the signal to...
The job scheduling strategy influences the QoS of data grid immediately. This paper firstly summarizes and defines data grid models and the process of job scheduling, simultaneously analyzes the time and cost of job execution in the data grid, then proposes a design proposal of the job scheduling simulator of data grid based on a grid simulator named GridSim, and introduces the architecture, process...
Weighted fair queueing (WFQ) is a practical scheduling discipline for supporting differentiated quality-of-service (QoS) in computer networks and communication systems. Analytical models are important tools for system performance evaluation and resource optimization. However, there is not any comprehensive model reported in the open literature for analytically investigating the performance behaviors...
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