WiMAX distributed scheduling can be modeled as two procedures：three-way handshaking procedure and data subframe scheduling procedure.Due to manipulating data transmission directly,data subframe scheduling has a close...WiMAX distributed scheduling can be modeled as two procedures：three-way handshaking procedure and data subframe scheduling procedure.Due to manipulating data transmission directly,data subframe scheduling has a closer relationship with user Quality of Service（QoS） satisfaction,and has more severe impact on network performance,compared with handshaking procedure.A QoS guaranteed Throughput-Efficiency Optimal distributed data subframe Scheduling scheme,named as QoS-TEOS,is proposed.QoS-TEOS achieves QoS guarantee through modeling services into different ranks and assigning them with corresponding priorities.A service with higher priority is scheduled ahead of that with lower priority and offered with high QoS quality.Same kinds of services that request similar QoS quality are classified into one service set.Different service sets are scheduled with different strategies.QoS-TEOS promotes network performance through improving network throughput and efficiency.Theoretical analysis shows that the scheduled data transmission should balance data generation rate from upper layer and transmission rate of physical layer,to avoid network throughput and efficiency declining.Simulation results show that QoS-TEOS works excellently to achieve throughput-efficiency optimization and guarantee a high QoS.展开更多
为解决IEEE802．16-2004标准中Mesh模式缺乏QoS（Quality of Service）保证机制的问题，提出了新的支持QoS保证的WiMAX（Worldwide Interoperability for MicrowaveAccess）Mesh网络架构。该架构使用原标准已有业务分类，定义了动态业...为解决IEEE802．16-2004标准中Mesh模式缺乏QoS（Quality of Service）保证机制的问题，提出了新的支持QoS保证的WiMAX（Worldwide Interoperability for MicrowaveAccess）Mesh网络架构。该架构使用原标准已有业务分类，定义了动态业务流建立的协议流程。通过拓展分布式管理消息实现了动态业务管理消息在WiMAX Mesh中的传递。改进Mesh模式下数据子帧分配方法，提供了不同业务的数据调度。改进的分布式调度消息可以快速地、完成业务流建立，数据子帧的分配方法则对不同级别业务提供了吞吐量和时延方面的支持。该架构设计可以有效地实现WiMAX Mesh网络服务质量保证。展开更多
为解决IEEE 802.16-2004标准中Mesh模式缺乏QoS(Quality of Service)保证机制的问题,提出了新的支持QoS保证的WiMAX(Worldwide Interoperability for Microwave Access)Mesh网络架构。该架构使用原标准已有业务分类,定义了动态业务流建...为解决IEEE 802.16-2004标准中Mesh模式缺乏QoS(Quality of Service)保证机制的问题,提出了新的支持QoS保证的WiMAX(Worldwide Interoperability for Microwave Access)Mesh网络架构。该架构使用原标准已有业务分类,定义了动态业务流建立的协议流程。通过拓展分布式管理消息实现了动态业务管理消息在WiMAX Mesh中的传递。改进Mesh模式下数据子帧分配方法,提供了不同业务的数据调度。改进的分布式调度消息可以快速地`完成业务流建立,数据子帧的分配方法则对不同级别业务提供了吞吐量和时延方面的支持。该架构设计可以有效地实现WiMAX Mesh网络服务质量保证。展开更多
在多跳中继的Wi Max Mesh网络中,当发送功率和信道带宽为定值时,用户接入链路的速率取决于用户到中继的距离,对于接入层中继位置的设计可以提高整个网络的吞吐量和进行无视距通信(Non Line Of Sight,NLOS)具有重要的意义。本文将该问题...在多跳中继的Wi Max Mesh网络中,当发送功率和信道带宽为定值时,用户接入链路的速率取决于用户到中继的距离,对于接入层中继位置的设计可以提高整个网络的吞吐量和进行无视距通信(Non Line Of Sight,NLOS)具有重要的意义。本文将该问题转化为空间最少簇的问题,算法首先根据用户位置的信息来划分出每个单个簇,然后在每个单个簇中生成符合的覆盖圆,寻找覆盖圆的圆心,得出中继的位置。模拟实验结果表明,与该问题已有算法MIS相比本文算法部署的中继的个数减少了51%,与算法HS相比减少了23%。通过使用较少的中继,本文算法较好地保证了网络的性能、提高了网络用户吞吐量。展开更多
基金Supported by Intel Project under Grant No.4507336215Huawei Project under Grant No.YBCB2007025the University of Science and Technology of China Innovation Foundation under Grant No.KD2008053.
文摘WiMAX distributed scheduling can be modeled as two procedures：three-way handshaking procedure and data subframe scheduling procedure.Due to manipulating data transmission directly,data subframe scheduling has a closer relationship with user Quality of Service（QoS） satisfaction,and has more severe impact on network performance,compared with handshaking procedure.A QoS guaranteed Throughput-Efficiency Optimal distributed data subframe Scheduling scheme,named as QoS-TEOS,is proposed.QoS-TEOS achieves QoS guarantee through modeling services into different ranks and assigning them with corresponding priorities.A service with higher priority is scheduled ahead of that with lower priority and offered with high QoS quality.Same kinds of services that request similar QoS quality are classified into one service set.Different service sets are scheduled with different strategies.QoS-TEOS promotes network performance through improving network throughput and efficiency.Theoretical analysis shows that the scheduled data transmission should balance data generation rate from upper layer and transmission rate of physical layer,to avoid network throughput and efficiency declining.Simulation results show that QoS-TEOS works excellently to achieve throughput-efficiency optimization and guarantee a high QoS.
文摘为解决IEEE802．16-2004标准中Mesh模式缺乏QoS（Quality of Service）保证机制的问题，提出了新的支持QoS保证的WiMAX（Worldwide Interoperability for MicrowaveAccess）Mesh网络架构。该架构使用原标准已有业务分类，定义了动态业务流建立的协议流程。通过拓展分布式管理消息实现了动态业务管理消息在WiMAX Mesh中的传递。改进Mesh模式下数据子帧分配方法，提供了不同业务的数据调度。改进的分布式调度消息可以快速地、完成业务流建立，数据子帧的分配方法则对不同级别业务提供了吞吐量和时延方面的支持。该架构设计可以有效地实现WiMAX Mesh网络服务质量保证。
文摘为解决IEEE 802.16-2004标准中Mesh模式缺乏QoS(Quality of Service)保证机制的问题,提出了新的支持QoS保证的WiMAX(Worldwide Interoperability for Microwave Access)Mesh网络架构。该架构使用原标准已有业务分类,定义了动态业务流建立的协议流程。通过拓展分布式管理消息实现了动态业务管理消息在WiMAX Mesh中的传递。改进Mesh模式下数据子帧分配方法,提供了不同业务的数据调度。改进的分布式调度消息可以快速地`完成业务流建立,数据子帧的分配方法则对不同级别业务提供了吞吐量和时延方面的支持。该架构设计可以有效地实现WiMAX Mesh网络服务质量保证。
文摘在多跳中继的Wi Max Mesh网络中,当发送功率和信道带宽为定值时,用户接入链路的速率取决于用户到中继的距离,对于接入层中继位置的设计可以提高整个网络的吞吐量和进行无视距通信(Non Line Of Sight,NLOS)具有重要的意义。本文将该问题转化为空间最少簇的问题,算法首先根据用户位置的信息来划分出每个单个簇,然后在每个单个簇中生成符合的覆盖圆,寻找覆盖圆的圆心,得出中继的位置。模拟实验结果表明,与该问题已有算法MIS相比本文算法部署的中继的个数减少了51%,与算法HS相比减少了23%。通过使用较少的中继,本文算法较好地保证了网络的性能、提高了网络用户吞吐量。
