检索结果-内蒙古大学图书馆

IEEE International Conference on Multimedia Computing and Systems (ICMCS)

作者： Abdelali El Bouchti Abdelkrim Haqiq Computer Networks Mobility and Modeling laboratory e-NGN research group Africa and Middle East FST Hassan 1 University Settat Morocco

ISBN: (纸本)9781467315180

We study in this paper the problem of queueing theoretic of OFDMA-based WiMAX with two classes of connections, connections with High Priority (HP) and connections with Low Priority (LP). The key idea to solve the problem of the mixed priority strategy is the technique of the Shadow server approximation. Specifically, we present a single-cell WiMAX environment in which the base station allocates subchannels to the subscriber stations in its coverage area. The subchannels allocated to a subscriber station are shared by multiple connections at that subscriber station. To ensure the Quality of Service (QoS) performances, a Connection Admission Control (CAC) mechanism is considered at a subscriber station. Then, based on the queueing model, both the connection-level and the packet-level performances are studied and compared with their analogues in the case without CAC. The connection arrival is modeled by a Poisson process and the packet arrival for a connection by a Markov Modulated Poisson Process (MMPP). Several performance measures are derived.

关键词： Queueing analysis OFDM Quality of service Approximation methods Radio spectrum management Servers Numerical models

来源：评论

学校读者我要写书评

暂无评论

Quality of Service analysis of control access scheme of multimedia traffic in HSDPA channel using Markovian Arrival Process and stochastic reward Nets

Quality of Service analysis of control access scheme of mult...

引用

International Conference on Innovative Computing Technology (INTECH)

作者： Abdelali El Bouchti Abdelkrim Haqiq Computer Networks Mobility and Modeling laboratory e-NGN research group Africa and Middle East FST Hassan 1st University Settat Morocco

High Speed Downlink Packet Access (HSDPA) is being increasingly deployed to enhance UMTS Radio Access networks. Scheduling of Node B (base station) buffered user data for transmission over a shared radio channel is a key HSDPA functionality which enables queue management techniques to be utilized to improve Quality of Service (QoS) for mixed `multimedia' services. In this paper, we study a control access scheme of multimedia stream in HSDPA channel. The control scheme consists in putting thresholds in the channel in order to well manage the access of the various packets by giving priority of access to the packets at real time. The RT arrival is modeled by a Poisson process and the NRT arrival by a Markovian Arrival Process (MAP) with two states. We use stochastic reward Nets (SRN) approach to derive QoS metrics of this control. Obtained results show the impact of workload aspects (e.g., arrival rate and service rate) and system capacity on two performance measures: mean response delay and job blocking probability.

关键词： Quality of service Multiaccess communication Spread spectrum communication Stochastic processes Computational modeling Delay Multimedia communication

来源：评论

学校读者我要写书评

暂无评论

Quality of service analysis of access scheme of multimedia traffic in HSDPA channel using stochastic reward Nets

Quality of service analysis of access scheme of multimedia t...

引用

IEEE International Conference on Multimedia Computing and Systems (ICMCS)

作者： Abdelali El Bouchti Abdelkrim Haqiq Computer Networks Mobility and Modeling laboratory e-NGN research group Africa and Middle East FST Hassan 1st University Settat Morocco

ISBN: (纸本)9781467315180

High Speed Downlink Packet Access (HSDPA) is being increasingly deployed to enhance UMTS Radio Access networks. Scheduling of Node B (base station) buffered user data for transmission over a shared radio channel is a key HSDPA functionality which enables queue management techniques to be utilized to improve Quality of Service (QoS) for mixed 'multimedia' services. Thus, we have previously studied a control access scheme of multimedia stream in HSDPA channel using stochastic analytic (SA) approach. In this paper, we use stochastic reward Nets (SRN) approach to derive QoS metrics of access control scheme in HSDPA channel. By comparing with stochastic analytic approach, we show that both approaches are scalable, tractable and give the same results. Obtained results show the impact of workload aspects (e.g., arrival rate and service rate) and system capacity on two performance measures: mean response delay and job blocking probability.

关键词： Subspace constraints Quality of service Delay Servers Multiaccess communication Spread spectrum communication Numerical models

来源：评论

学校读者我要写书评

暂无评论

Analysis of Quality of Service Performances of Connection Admission Control Mechanisms in OFDMA IEEE 802.16 Network using BMAP Queuing

引用

International Journal of computer Science Issues 2012年第1 1-2期9卷 302-310页

作者： El Bouchti, Abdelali Haqiq, Abdelkrim El Kafhali, Said Computer Networks Mobility and Modeling Laboratory E- NGN research group Africa and Middle East FST Hassan 1st University Settat Morocco

In this paper, we consider a single-cell IEEE 802.16 environment in which the base station allocates subchannels to the subscriber stations in its coverage area. The subchannels allocated to a subscriber station are shared by multiple connections at that subscriber station. To ensure the Quality of Service (QoS) performances, two Connection Admission Control (CAC) mechanisms, namely, threshold-based and queue-aware CAC mechanisms are considered at a subscriber station. A queuing analytical framework for these admission control mechanisms is presented considering Orthogonal Frequency Division Multiple Access (OFDMA) based transmission at the physical layer. Then, based on the queuing model, both the connection-level and the packet-level performances are studied and compared with their analogues in the case without CAC. The connection arrival is modeled by a Poisson process and the packet arrival for a connection by Batch Markov Arrival Process (BMAP). We determine analytically and numerically different QoS performance measures (connection blocking probability, average number of ongoing connections, average queue length, packet dropping probability, queue throughput and average packet delay). © 2012 International Journal of computer Science Issues.

关键词： Frequency division multiple access

来源：评论

学校读者我要写书评

暂无评论

Queueing analysis of multiple service classes in orthogonal frequency division multiple access based WiMAX system under connection admission control mechanisms

Queueing analysis of multiple service classes in orthogonal ...

引用

Symposium on Broadband networks and Fast Internet (RELABIRA)

作者： Abdelali El Bouchti Abdelkrim Haqiq Zhor Lhadi Computer Networks Mobility and Modeling laboratory e-NGN research group Africa and Middle East FST Hassan 1st University Settat Morocco

This paper focuses on the study of queueing theoretic problem of OFDMA-based WiMAX with three classes of connections, connections with High Priority (HP), conections with Medium Priority (MP) and connections with Low Priority (LP). The key idea to solve the problem of the mixed priority strategy is the technique of the Shadow server approximation. Specifically, we present a single-cell WiMAX environment in which the base station allocates subchannels to the subscriber stations in its coverage area. The subchannels allocated to a subscriber station are shared by multiple connections at that subscriber station. To ensure the Quality of Service (QoS) performances, two Connection Admission Control (CAC) mechanisms, namely, threshold-based (tb) and queue-aware (qa) CAC schemes are considered at a subscriber station. Then, based on the queueing model, both the connection-level and the packet-level performances are studied and compared with their analogues in the case without CAC. The connection arrival is modeled by a Poisson process and the packet arrival for a connection by a Markov Modulated Poisson Process (MMPP). Several performance measures are derived.

关键词： Servers Analytical models WiMAX IEEE 802.16 Standards Queueing analysis Admission control

来源：评论

学校读者我要写书评

暂无评论

Queueing performance analysis of CAC scheme in OFDMA based WiMAX system

Queueing performance analysis of CAC scheme in OFDMA based W...

引用

3rd International Conference on Next Generation networks and Services, NGNS'2011

作者： Bouchti, Abdelali El Kafhali, Said El Haqiq, Abdelkrim Computer Networks Mobility and Modeling Laboratory E-NGN Research Group Hassan 1st University Settat Morocco

ISBN: (纸本)9781467301398

This paper presents a problem of queueing theoretic performance modeling and analysis of Orthogonal Frequency Division Multiple Access (OFDMA) under broad-band wireless networks. We consider a single-cell WiMAX environment in which the base station allocates subchannels to the subscriber stations in its coverage area. The subchannels allocated to a subscriber station are shared by multiple connections at that subscriber station. To ensure the Quality of Service (QoS) performances, a Connection Admission Control (CAC) scheme is considered at a subscriber station. A queueing analytical framework for these admission control schemes is presented considering OFDMA-based transmission at the physical layer. Then, based on the queueing model, both the connection-level and the packet-level performances are studied and compared with their analogues in the case without CAC. The connection arrival is modeled by a Poisson process and the packet arrival for a connection by a Markov Modulated Poisson Process (MMPP). We determine analytically and numerically different performance parameters. © 2011 IEEE.

关键词： Quality of service

来源：评论

学校读者我要写书评

暂无评论

Access control of multimedia traffic in a 3.5G wireless network

Access control of multimedia traffic in a 3.5G wireless netw...

引用

International Conference on Multimedia Computing and Systems

作者： Bouchti, Abdelali El Haqiq, Abdelkrim Computer Networks Mobility and Modeling Laboratory e-NGN Research Group Africa and Middle East Hassan 1st University Settat Morocco

ISBN: (纸本)9781612847306

The High Speed Downlink Packet Access (HSDPA) is used more in the radio operator interface of the access network of the UMTS. Its principle is to share a common channel (buffer) with high throughput between the users of the cell in order to improve the quality of service of multimedia traffic. In this paper, we propose and study a mechanism of access control to the channel of two types of packets, packets at real time (voice and/or video) and non real time packets (data). The mechanism of control consists in putting thresholds in the channel in order to well manage the access of the various packets by giving priority of access to the packets at real time. The NRT arrival is modeled by a BMAP process and the RT arrival by a Poisson process. We study analytically and numerically the various parameters of performance (loss probability, average delay of packets, average number of packets in the buffer) of this control. © 2011 IEEE.

关键词： Access control

来源：评论

学校读者我要写书评

暂无评论

Access control of multimedia traffic in a 3.5G wireless network

Access control of multimedia traffic in a 3.5G wireless netw...

引用

IEEE International Conference on Multimedia Computing and Systems (ICMCS)

作者： Abdelali El Bouchti Abdelkrim Haqiq Computer Networks Mobility and Modeling laboratory e- NGN research group Settat Morocco

关键词： Markov processes Multiaccess communication Mathematical model Spread spectrum communication Equations Multimedia communication Real time systems

来源：评论

学校读者我要写书评

暂无评论

Queueing performance analysis of CAC scheme in OFDMA based WiMAX system

Queueing performance analysis of CAC scheme in OFDMA based W...

引用

International Conference on Next Generation networks and Services (NGNS)

作者： Abdelali El Bouchti Said El Kafhali Abdelkrim Haqiq Computer Networks Mobility and Modeling laboratory e-NGN research group Africa and Middle East FST Hassan 1st University Settat Morocco Computer Networks Mobility and Modeling laboratory e-NGN research group Africa and Middle East FST Hassan 1st University Settat Morocco Pontificia Universidad Catílica de Valparaiso Chile

关键词： WiMAX Analytical models Delay Markov processes Admission control Queueing analysis

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：