The Quality of Service (QoS) term is refer to capability of network to prioritization and service distinguish for providing
better service to some service classes and call types.
Because of the lack of resources, from one side, and user's mobility
from the other, provision of QoS guarantees is considered at the head of the challenges that wireless cellular mobile network systems face.
Call Admission Control (CAC) is used for providing and achieving QoS guarantees in wireless systems.
This paper proposes a new CAC algorithm with priority index for providing and achieving QoS guarantees on the call level in
wireless systems in terms of new call blocking probabilities using multiple thresholds to determinate the number of acceptable new calls of each type of service.
Results of simulation provided in this paper show that the application of proposed new CAC algorithm with priority index on
the New Call Bounding Scheme (NCBS) provides a new CAC scheme which has better performance in terms of new call blocking
Probabilities and guarantees any desired level of QoS for new call types with the keeping priority of handoff calls.
Providing a good Quality of Service (QoS) for all users is a big challenge in Cellular Networks, as soon as the number of users increases the demand on Internet service increases too especially with using the current technology of today. While on mov
e a user needs Internet connectivity with good Quality of Service and minimum call dropping probability.
Cellular IP presents a good solution mobility as it supports highly mobile users, users' needs are becoming larger and more multifarious (files downloading, video streaming, sending an e-mail….) there for the need for efficient way to improve QoS is necessity.
Bandwidth is the most important factor in Cellular IP Networks, for improving QoS in Cellular IP Networks a model for bandwidth management is presented in this paper, the model presented here is based on borrowing bandwidth reserved to non-real-time users using Particle Swarm Optimization (PSO) the proposed model preserves a low bandwidth threshold for the ongoing non-real-time calls. This threshold is the security limit that keeps non-real-time calls from being dropped. This research models handoff process and proposes a technique that gives the lowest percentage of dropped and blocked hand offs. Simulation results show the efficacy of the proposed model.
This Paper discusses the mathematical modeling of the source traffic using Poisson, Pareto, and Weibull distributions along with performance comparison considering these three types of traffic generators: (1) Poisson distribution for modeling the BL
( Pos BL ) and Exponential distribution for modeling the GT ( Exp GT ), the corresponding traffic generator represented by / Pos Exp BL GT ; (2) Pareto distribution for modeling the BL ( Par BL ) and Pareto distribution for modeling the GT ( Par GT ), the corresponding traffic
generator represented by / Par Par BL GT ; and (3) Pareto distribution for modeling the BL ( Par BL ) and Weibull distribution for modeling the GT ( Wb GT ), the traffic generator represented by / Par Wb BL GT . Nonbursty traffic was modeled vsing Poisson distribution for burst length and exponential distribution for gap
time whereas bursty traffic modeling was achieved through heavy tailed Pareto and Weibull distributions.
The comparison between the three traffic generators has been verified through simulation for six sources Examining the simulation results for Allowed Cell Rate (ACR) and Memory Access which indicate the performance of the switch under / Pos Exp BL GT , / Par Par BL GT , and / Par Wb BL GT traffic generators, It is seen that the switch offers best performance under / Par Wb BL GT traffic generators.
This research aims to study the relation between the usage of computer and the quality of service in the managerial office in TISHREEN university by measuring the. A questionnaire of (169) copies has distributed to employees in the university, and an
other questionnaire has distributed to (247) college students in the university.
The main finding of the research can be summarized as follows:
- The average of usage the computer in the office and the average of service’s responsiveness and service’s reliability is low.
- There is a positive relation between the usage of computer and the quality of services that produce in the managerial office in TESHREEN University.
The study aimed to investigate labor turnover rate effect on tourism service quality, by determining labor turnover rate effect on service quality dimensions (reliability, sympathy). The study conducted on sample of managers ,labor and hotel customer
s in in the Syrian Coast.
The study results show that labor turnover rate affects tourism service quality. Whereas there is a relationship between labor turnover rate and service quality. and that there is an acceptable relationship between reliability and the labor turnover rate and a weak relationship between sympathy and the labor turnover rate.
Long Term Evolution “LTE” is considered to be one of the most
important and latest communication technologies falling under the fourth
generation of cellular communications technology 4G. LTE supports
high-speed and large bandwidth which makes it
a great candidate to
providing the potential to improve the Quality of Service "QoS"
associated with specific types of data transfer. As a consequence,
researchers have paid their attentions to this type of networks. In fact, it
was a great challenge for researchers to achieve a good level of QoS for
all users as the LTE provides Audio and Data transmission to users at the
same time.
The aim of the research is to identify the level of internal service quality and job
satisfaction in the Holiday Beach property in Tartous, as well as to identify the role of
internal service quality in its various dimensions to achieve job satisfa
ction among workers
at the facility. The research is applied in 2015 on a sample of (55) employee. To achieve the
aim of the research, a questionnaire is designed consisting of two parts; the first dealt with
job satisfaction, and included (23) terms, and the second part dealt with the quality of
internal service including (18) terms. The research reached several conclusions, including:
The level of quality of internal services is a medium degree, and that the degree of job
satisfaction for workers about the quality of internal services is medium, and the presence of
a statistically significant relationship between the quality of internal services and job
satisfaction for workers in the facility. The research also found that there are no statistically
significant differences in the answers of the research sample members about the quality of
internal service depending on the sex variable, and the presence of statistically significant
differences depending on the educational qualification variable for of high studies graduates.
Results also showed that there were no statistically significant differences in the research
sample answers about the degree of job satisfaction among workers at the facility depending
on the variables (sex, educational qualification). The research also made several proposals,
including: providing high facilities in the internal service, which will positively reflect on the
satisfaction of the employees on the one hand, and on the external service on the other hand.
In this paper the tracking model in WiMAX Relay Station'
Directional antenna are implemented by OPNET Modeler to Direct
the beam toward users.
This study aims to verify the factors affecting Pharmacists’ loyality towards ASIA’s agent in Lattakia. It aims to determine the effects of quality of service dimensions (reliability, responsiveness, assurance, empathy and tangibility), service avail
ability, service completion, service professionalism on pharmacists’ satisfaction, and to determine the effect of pharmacists’ satisfaction on their loyality to ASIA’s agent in Lattakia. It also aims to determine whether there are significant differences in pharmacists’ satisfaction due to demographic factors.
The research aims to recognize theimpact oflogistic activities in improving services
Establishments.Particularly of Tartousport In Syria's current circumstances. And that is,
how the workers in Tartous Port envision it.
The researchdepended on the
descriptive, analytic method and it used a
questionnaire for 200Employees who work for the general company of Tatous Port.
The research incloses the impact oflogistics activities (Transport,Warehousing,
Supplying, Use of information Technology) in improving of services establishments in:
(Speed of sesponse, Interest, Tangibility, Reliabitity, Safety).
The most important findings of the research are: -. The transport level of Tartous
Port was weak, but the stowage levels wareacceptable. – The Supply Systems
wasacceptable.
In light of these results the researcher suggests some of recommendations which can
contribute, if applied, in improving the quality of PortService.
