Best Effort and Priority Queuing Policies for Buffered Crossbar Switches

Quality of service provision in combined input and crosspoint queued switches without output queueing match

Tour guide has an important role toward the tourism business in Bali, they take care the guests since they arrive until they depart from Bali. Therefore a tour guide should be able to give the best quality of service and also improve it if to provide better service in the future. In order to achieve the best quality of service, the government should create a rule which regulate how a tour guide can be a profession in order to provide a better quality of service to the guests who visit Bali. Bali Regional Rule no 5 year 2008 about Tour Guides is a kind of regulation established by Bali Government as a foundation for a Tour Guide in doing their profession. However, in fact there are so many irrelevant services given by a Tour Guide and it was not based on the regulation and it caused the problems in this thesis. Are there any factors that generate a specific license for a tour guide based on Bali Regional Rule no 5 year 2008 about Tour Guides could not be released? How is the application of punishment ofthose tour guides who did not obey the regulation based on Bali Regional Rule no 5 year 2008 about Tour Guides? This research used empiric approach which means that we are doing an approach by solving the problem that we face during the research. In relation with the regulations and law and also the law theories which relevant applied in this research e.g. theory of obeying the law, theory of authority and theory of product quality. In order to show the government’s authority to apply the law and how the regulation is able to guarantee the law and also to ensure that the government regulation can guarantee the tour guide quality to provide the best quality of services.

This work investigates which algorithm of scheduling algorithm will provide the best QoS for which type of application in addition to how stationary nodes and mobile nodes affect the network in terms of mobility and time. We used variable scheduling algorithms Weighted Fair Queuing (WFQ), Priority Queuing (PQ),First In First Out (FIFO) for different applications including real-time and non-real-time, in the context of mobility and stationery to investigate which algorithm of scheduling will provide the best quality of service with presenting a HetNet based LTE-A architecture including macrocell, picocells and femtocells.

Output queuing is well known for its ability to provide Quality-of-Service (QoS) guarantees. Unfortunately, the high-speed memory requirements of output queued (OQ) switch limit its use for large capacity switching architecture. A lot of work in literature has investigated how to emulate OQ switch with other switch architectures. A novel approach is constructing switches with buffered crossbars. However, most of the presented schemes still need a mild speedup which will incur significant cost for high speed network application. This paper investigates how to build a buffered crossbar switch to emulate OQ switch with no speedup. We first present a 2-dimensional buffered crossbar as a switch fabric and prove that a combined input-crosspoint-output queued (CICOQ) switch with such a fabric can emulate a restrict PIFO-OQ switch with no speedup. Then, we present a pretreatment mechanism used in scheduling input queues. With such a pretreatment mechanism, the CICOQ switch is proved to be able to emulate a general PIFO-OQ switch with no speedup. All scheduling algorithms used in proving OQ emulation are distributed, hence are practical.

Time-Sensitive Networking (TSN) is a series of standards designed to enhance reliable and real-time transmission. Switching architecture is the essential component in TSN switches to guarantee the different quality of service (QoS) requirements. However, most existing TSN switching architectures are based on the fixed queue scheduling such as Input Queue or Output Queue, which leads to complex schedule processes and inefficient memory utilization. Therefore, a flexible and efficient switching architecture is needed in terms of heterogeneous traffics requirements. This paper proposes a Virtual-Queue Switching (VQS) architecture with Parallel Shared Memory (PSM) for TSN switches. First, we develop a virtual queue scheduler using the queue ID and the flow rank. By configuring the queue ID and the flow rank, the VQS architecture supports multiple scheduling strategies. Second, parallel shared memory (PSM) management is designed to ensure that storage of TS flows takes precedence over other flows. All kinds of flows share storage resources in PSM, which improves memory utilization. At last, a scheduling algorithm for IEEE 802.1Qbv based on VQS architecture is designed. Compared From the comparison results with the previous switching

Health Centers providing the best quality of service can affect consumer satisfaction in using services. If the quality of service, facilities, and promotions consumers offer is unsatisfactory, consumers no longer use Health Center services. This research focuses on consumer satisfaction with the services provided by the Health Center after using these services and what attributes need to be improved to increase customer satisfaction. This study aims to determine patient satisfaction with the services provided by Health Center X. The method used in this study is IPA (Importance Performance Analysis). This method, also known as quadrants analysis, aims to measure the relationship between consumer perception and the priority of improving the quality of products or services. Twenty-one attributes or statements represent each service dimension: tangibles, empathy, reliability, responsiveness, and assurance. For the quality of services provided by the Health Center to be improved, the Puskesmas must make improvements as soon as possible to statements that fall into the categories that need improvement, namely the words "Large car or motorcycle parking," "Officers carry out administrative processes quickly and precisely," "The ability of the Health Center to respond to complaints, criticisms, and suggestions from patients," and "Guarantee of trust given by officers to services." Puskesmas gets a customer satisfaction level value of 79.03%, which means that the performance given by the Health Center to customers or patients is included in the Satisfied category.

While observing the various financial institutions in our country we notice the existence of multiple varieties such as: insurance institutions, banks, institutions of social services etc. Among the financial institutions mostly used by businesses and people in general we distinguish the banks. In addition, today’s market tendencies have increased the request for financial bank services. As a result, lately the number of banks in our country has increased. This phenomenon has increased customer service, the quality of service and higher competition among banks. Under these conditions it is necessary that banks use aggressive marketing strategies in order to be successful and competitive among their own kind. Due to the increase in market competition, identifying consumer’s needs and increasing the quality of service has become a very important trend in today’s marketing world. Research has shown that good quality customer service generates better income. While trying to determine what marketing strategies give the edge, academic researchers are trying to figure out what kind of customer service works best in today’s environment so that they can improve it. Based on various studies the quality of service has a huge impact on consumer’s satisfaction and their loyalty, at the same time it is established as a result of comparison that clients do between the expectations they have for service and their perception of the quality of service rendered. (Parasuraman et al., mentioned in Caruana, 2002).The quality of service has a positive effect in the performance of a bank; as a result it gains competitive advantages due to the improvement of quality of service. As such, what clients think of a service overpasses their expectations for the same service. Caruana, 2002; Chumpitaz, 2004). Due to higher internet access in today’s world, the way businesses are managed including the banking business has changed. Consumers are expecting better quality of service, shorter transaction times and better service conditions. However, because the nature of the services, susceptibility, indivisibility, heterogeneity and the quality of services become difficult to be appreciated. DOI: 10.5901/mjss.2013.v4n9p418

A Framework to Facilitate Network Operators to Provide Better Quality of Service in Mobile Networks

Several algorithms have been proposed to provide better Quality of Service (QoS) in networks. Software Defined Networks (SDN) is a new approach in networking that is revolutionizing the traditional networks. Mechanisms such as differentiated services, admission control and traffic engineering methods are used to provide QoS in SDN networks the same as the traditional networks. In addition, because of the programmability of the SDN networks and centralized control on network switches, the ability to implement many of these algorithms is provided. In this paper a new method is presented to provide better Quality of Service in SDN networks using differentiated services. In this method flows entering the network are dynamically assigned to DiffServ Queues at the output port. If needed, flows are moved between the queues so that while preventing increasing delays of existing flows new flows can be accepted by using available capacities of other queues. Simulation results show that in this way, the network utilization is increased.

The industry of telecommunications is being transformed towards 5G technology, because it has to deal with the emerging and existing use cases. Because, 5G wireless networks need rather large data rates and much higher coverage of the dense base station deployment with the bigger capacity, much better Quality of Service - QoS, and the need very low latency [1–3]. The provision of the needed services which are envisioned by 5G technologies need the new service models of deployment, networking architectures, processing technologies and storage to be defined. These technologies will cause the new problems for the cybersecurity of 5G systems and the security of their functionality. The developers and researchers working in this field make their best to secure 5G systems. The researchers showed that 5G systems have the security challenges. The researchers found the vulnerabilities in 5G systems which allow attackers to integrate malicious code into the system and make the different types of the illegitimate actions. MNmap, Battery drain attacks and MiTM can be successfully implemented on 5G. The paper makes the analysis of the existing cyber security problems in 5G technology. Based on the analysis, we suggest the novel Intrusion Detection System - IDS by means of the machine-learning algorithms. In the related papers the scientists offer to use NSL-KDD in order to train IDS. In our paper we offer to train IDS using the big datasets of DOS/DDOS attacks, besides of training using NSL-KDD. The research also offers the methodology of integration of the offered intrusion detection systems into an standard architecture of 5G. The paper also offers the pseudo code of the designed system.

This study discusses the effect of service quality on customer loyalty mediated by customer satisfaction at PT. Maybank Indonesia Finance Jakarta Branch. This research was conducted by using purposive sampling. Data analysis using Smart PLS analysis. The results of the analysis conclude that service quality does not affect customer loyalty. So it can be said, good service quality may not necessarily make the customer loyal to PT. Maybank Indonesia Finance because there are still several factors that can make customers loyal. Service quality has a positive and significant effect on customer satisfaction. So it can be said, good service quality will increase customer satisfaction with PT. Maybank Indonesia Finance. Customer Satisfaction has a positive and significant influence on Customer Loyalty. So it can be said, increasing customer satisfaction will make customers more loyal to PT. Maybank Indonesia Finance. Customer satisfaction can mediate the effect of service quality on customer loyalty. So it can be said, if the quality of service provided is getting better, it will form high customer satisfaction in the minds of customers, then this will further increase customer loyalty at PT. Maybank Indonesia Finance.

Approximate Markov chains for the performance of banyan networks built with basic switches of arbitrary size containing input queues, output queues or a combination of input buffers and output queues are presented. These chains are also extended to model banyans where each link is replaced by a number of parallel links. Comparison with simulations indicates that the chains are reasonably accurate for practical network loads. It is shown that banyans built with switches containing a combination of single input buffers and output queues outperforms banyans built with switches containing only input queues or only output queues. Banyans built with larger nodes are shown to outperform banyans built with smaller nodes. It is shown that banyan-based networks with multiple links can be designed to have extremely low blocking probabilities. >

The various services that are offered by IoT and Cloud Service Providers (CSPs) to the customers today feature a pay-per-use service-charging policy. Customers can choose and avail these services when they want, how they want, and from where they want on demand. Demand for these services has increased drastically over the years among individuals and enterprises worldwide, and thus, it is very important to keep up good Quality of Service (QoS). This chapter highlights the history of internet, the gradual evolution of cloud computing, the reasons behind it, evolution and concepts of the Internet of Things (IoT), CloudIoT and its necessities, and various applications and service fields of CloudIoT. This chapter also precisely highlights various concepts regarding maintenance of good QoS, controversies in QoS maintenance, different parameters that the QoS depends on, various problems faced in maintaining those parameters, and the possible solutions for overcoming those problems. Possible directions towards future works are also highlighted in this chapter.

With the onset of multimedia applications, Quality of Service (QoS) in 802.11-based wireless ad hoc networks has been an essential area to look into. Standard wireless protocols such as IEEE 802.11b and IEEE 802.11e have been deemed unsuitable for multimedia traffic transmission in an ad hoc (multihop) network environment due to the unique network characteristics. As an ad hoc network is infrastructureless and distributed in nature, it gives rise to several challenges in QoS provisioning. In this thesis, we focus on the research of three key areas on QoS in ad hoc networks namely, buffer management in the medium access control (MAC) layer, cross-layer design and flow admission control. Firstly, we study MAC layer buffer management in the IEEE 802.11e protocol. The IEEE 802.11e MAC protocol provides QoS for multimedia traffic by probabilistic priority queueing. Ad hoc networks tend to generate a large volume of network control packets for route maintenance and these control packets are typically queued in the highest priority queue. As a result, higher priority control traffic is always being served, consuming most of the bandwidth and results in poor network performance for data traffic. We examine this problem and propose a dynamic buffer management scheme to mitigate it. By setting different threshold levels in different priority queues, we allow lower priority data traffic to be served when the higher priority control traffic is deemed to be excessive. Simulation of our proposed scheme has shown that our approach yielded better network performance compared to the standard protocol in terms of packet delivery ratio and average delay. Secondly, we study the cross-layer interaction between the MAC and Network layers to identify its impact on QoS. We select the IEEE 802.11e MAC protocol and Ad-hoc On Demand Distance Vector (AODV) routing protocol in our study since they are standardized protocols for wireless networks. In IEEE 802.11e MAC protocol, lower priority traffic has a higher probability of being blocked. Hence, the MAC layer will inform the Network layer of a broken link through the link notification function. In this case, AODV will re-route the paths that traverse this link. As a result, higher priority traffic which shares the same link as the lower priority traffic will undergo the same re-routing procedures. We termed this phenomenon path correlation effect. Under high traffic load, the path correlation effect will be more intense and hence degrade the QoS of higher priority traffic. To break the path correlation effect, we propose a cross-layer design called the Bundled Virtual Circuit (BVC). Our proposed BVC scheme not only addresses the path correlation issues, but also provides priority treatment from the Network layer to the MAC layer. Through our simulations, our proposed cross-layer design approach is proven to provide better network performance than the 802.11e/AODV protocols in terms of packet delivery ratio and delay. Finally, we examine flow admission control at the routing layer in ad hoc networks. Standard routing protocols such as AODV performs routing on a shortest path basis. In the presence of multiple routes, hotspots are likely to form among the intermediate nodes and thus lead to network congestion. In addition, existing routes are not well-protected from the introduction of new routes. We propose a flow admission control algorithm to be used with AODV. Our algorithm allows routes to be created through available bandwidth and congestion estimation. During the route discovery phase, each node will be gauged on its estimated available bandwidth and its backlog of packets in the MAC buffer. If a node does not have sufficient bandwidth, or has too many backlogged packets compared to the requested flow rate, it will not participate in the route discovery process. From simulations, our new scheme is able to provide better network performance than the standard AODV protocol in terms of delay. Our work in this thesis focuses on QoS provisioning in ad hoc networks from the MAC and network layer perspectives. By studying the network characteristics and protocols’ behavior, we investigate the various problems of providing QoS in an ad hoc network environment and propose three different schemes to improve the QoS provisioning at the MAC and network layers. We believe that our work is able to provide some insights to the research area on QoS in ad hoc networks.

Low cost broadband services used widely in the recent years increased the demand for multimedia applications. Many of these applications require different quality of service (QoS) in terms of throughput and delay. In the current resource constrained wireless networks, resource management plays a vital role. In order to handle the resources effectively and to increase the QoS, proper packet scheduling algorithms need to be developed. Low latency queuing (LLQ) is a packet scheduling algorithm which combines strict priority queuing (SPQ) to class-based weighted fair queuing (CBWFQ). In this paper, an enhanced low latency queuing (ELLQ) algorithm is proposed in which an additional SPQ is introduced along with the existing SPQ. Further, the QoS is improved by integrating congestion avoidance algorithm with ELLQ. Simulation results using the OPNET modeller show that the proposed algorithm outperforms the existing algorithm in terms of throughput and delay for the multimedia applications.