• Journal of Korea Multimedia Society
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• v.11 no.11
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• pp.1536-1546
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• 2008

RSVP-capable router supporting guaranteed services on the internet generally uses a packet scheduler based on the Weighted Fair Queuing (WFQ) algorithm to secure required qualities of traffic flows. A RSVP-capable router based on the LOFQ (Latency optimized fair queuing) algorithm had been proposed to improve the performance of the WFQ-based RSVP-router, but it required not only the RESV message to be expanded but also its performance could be evaluated only through simulation. This paper proposed a LOFQ based RSVP-capable router using the conventional RESV message and developed an algorithm to analyze the performance of the LOFQ based RSVP-capable routers. The performance evaluation using the developed algorithm showed that in terms of performance improvement the proposed router is inferior to the one using the expanded RESV message under a small packet size, but on the range of a large packet size both routers provide the same improvement.

• The KIPS Transactions:PartC
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• v.14C no.2
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• pp.155-162
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• 2007

WFQ (Weighted Fair Queuing) is the most popular fair queuing algorithm, but it had the inherent drawback of a poor bandwidth utilization, particularly under the traffic requiring a low rate but tight delay bound such as internet phone, It was recently identified that the poor utilization is mainly due to non optimized latency of a flow and then LOFQ(Latency-Optimized Fair Queuing) to overcome the drawback was introduced, LOFQ was also improved through introducing an occupied resource optimization function and the implementation complexity of recursive resource transformation was reduced with revising the transformation scheme. However, the performance of LOFQ has been evaluated by means of simulation, so that there are some difficulties in evaluating the performance in the terms of the accuracy and evaluation time, In this paper, we develop how to analytically compute the bandwidth utilization in LOFQ.

• East Asian Journal of Business Economics (EAJBE)
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• v.9 no.2
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• pp.43-54
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• 2021

Purpose - This study aims to build other studies and research on the perception and association of fair hiring policy and employee job satisfaction. The reviews and further research of the performance appraisal and employee satisfaction topics provided a basis to conduct this study based on the challenges that result from equality hiring perception on the performance appraisal on the job satisfaction by employees. Research design, data, and methodology - The author collected many textual contexts from mostly peer-reviewed academic journals, which means that academic comprehensive integrity can be obtained by qualitative approach for this study with discussing and following a constructive review analysis. The content analysis aims to determine a textural dataset in the longtime frame from the newest textural information. Result - There is little doubt that this study was significant and relevant to the relationship between fair hiring policy and worker's job satisfaction, indicating that an organization that practices a fair hiring policy positively affects employee job satisfaction. After all, the employee needs are well catered for and meet appropriately. Conclusion - This study suggests that fairness extensively relies on the organization's ability to identify and eliminate any form of performance challenges regarding equity and has proved and determined the significant relationship between fair hiring policy and employees' job satisfaction

• Korea Trade Review
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• v.44 no.1
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• pp.57-73
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• 2019

The purposes of this study are to propose exhibition planning and management skills of trade fair organizers and to provide suggestions on the direction of government policies related to fair items. This study analyzes exhibitor objectives of exhibition participation and exhibition choice attributes using revised importance-performance analysis. This research uses visitor level, organizer services and market attraction of hosting country, as explanatory variables affecting companies' trade show choices. It also utilizes sales and non-sales purposes of participants as variables of exhibitors' objectives. As a result of the empirical analysis and examination of prior research, this study presents some recommendations for exhibition organizers and governments of hosting countries. First, the exhibition organizer should consider the importance of the number of visitors. Thus, the organizer should focus on prior marketing activities to attract visitors. Second, the organizer should make a trade fair plan in compliance with participants' needs. Third, policy authorities should provide environment of free competition among players.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.28 no.4C
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• pp.343-355
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• 2003

Fair bandwidth allocations at routers protect adaptive flows from non-adaptive ones and may simplify end-to end congestion control. However, traditional fair bandwidth allocation mechanisms, like Weighted Fair Queueing and Flow Random Early Drop, maintain state, manage buffera and perform packet scheduling on a per-flow basis. These mechanisms are more complex and less scalable than simple FIFO queueing when they are used in the interi or of a high-speed network. Recently, to overcome the implementation complexity problem and address the scalability and robustness, several fair bandwidth allocation mechanisms without per-flow state in the interior routers are proposed. Core-Stateless Fair Queueing and Rainbow Fair Queuing are approximates fair queueing in the core-stateless networks. In this paper, we proposed simple Layered Fair Queueing (SLFQ), another core-stateless mechanism to approximate fair bandwidth allocation without per-flow state. SLFQ use simple layered scheme for packet labeling and has simpler packet dropping algorithm than other core-stateless fair bandwidth allocation mechanisms. We presente simulations and evaluated the performance of SLFQ in comparison to other schemes. We also discussed other are as to which SLFQ is applicable.

• Journal of Korea Multimedia Society
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• v.10 no.7
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• pp.893-901
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• 2007

Since real-time multimedia applications requiring duality-of-service guarantees are spreading over mobile and wireless networks, energy efficiency in wireless channels is becoming more important. Energy consumption in the channels can be reduced with decreasing the rate of scheduler's outgoing link by means of Dynamic Modulation Scaling (DMS). This paper proposes a fair queuing algorithm, termed Rate Efficient Fair Queuing (REFQ), in order to reduce the outgoing link's rate, which is based on the Latency-Optimized Fair Queuing algorithm developed to enhance Weighted Fair Queuing (WFQ). The performance evaluation result shows that REFQ does decrease the link rate by up to 35% in comparison with that in WFQ, which results in reducing the energy consumption by up to 90% when applied to the DMS based radio modem.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.33 no.6A
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• pp.643-651
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• 2008

In this paper, we analyze the performance of normalized SNR based proportional fair scheduling with partial feedback information for multiuser MIMO-OFDMA systems. The closed form expression on the downlink capacity of the selective partial CQI feedback scheme is derived and its asymptotic behavior is investigated. From the performance analysis and numerical results, it is found that the optimal growth rate of downlink capacity can be achieved with bounded average feedback overhead irrespective of the number of users.

• Journal of Digital Convergence
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• v.14 no.4
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• pp.315-324
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• 2016

This study, investigating the differences of public hospital employees' communication, motivation, mutual trust, working conditions, fair compensation, job satisfaction, is to identify the factors affecting organizational performance. Through this, an alternative is suggested, which can maximize organizational performance of hospital employees. The period was from October 5 to October 31, 2014 to collect the data from 232 subjects working in public hospitals. ANOVA and regression analysis were conducted and the finding shows that communication, motivation, mutual trust, working conditions, fair compensation, job satisfaction have a significant difference (p<0.05) based on job categories. In addition, the factors affecting organizational performance were communication and fair compensation (p<0.001) for nursing job, age and employment type (p<0.05) and fair compensation (p<0.001) for Medical Support, motivation and fair compensation (p<0.001) for administrative job. The efforts to improve human resource management in their organization which is able to inspire a sense of belonging should be followed.

• ETRI Journal
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• v.40 no.5
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• pp.624-633
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• 2018

Fair bandwidth allocation (FBA) has been studied in optical burst switching (OBS) networks, with the main idea being to map the max-min fairness in traditional IP networks to the fair-loss probability in OBS networks. This approach has proven to be fair in terms of the bandwidth allocation for differential connections, but the use of the ErlangB formula to calculate the theoretical loss probability has made this approach applicable only to Poisson flows. Furthermore, it is necessary to have a reasonable fairness measure to evaluate FBA models. This article proposes an approach involving throughput-based-FBA, called TFBA, and recommends a new fairness measure that is based on the ratio of the actual throughput to the allocated bandwidth. An analytical model for the performance of the output link with TFBA is also proposed.

• Journal of Korea Multimedia Society
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• v.10 no.1
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• pp.83-93
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• 2007

WFQ (Weighted Fair Queuing) is the most popular fair queuing algorithm, but it had the inherent drawback of a poet bandwidth utilization, particularly under the traffic requiring a low rate but tight delay bound such as internet phone. It was recently identified that the poor utilization is mainly due to the non-optimized latency of a flow and then LOFQ(Latency-Optimized Fair Queuing) to overcome the drawback was introduced. In this paper, we improve the performance of LOFQ by introducing an occupied resource optimization function and reduce the implementation complexity of recursive resource transformation by revising the transformation scheme. We also prove the superiority of LOFQ over WFQ in terms of utilization. The simulation result shows that the improved LOFQ provides $20{\sim}30%$ higher utilization than that in the legacy LOFQ.