To meet the booming development of diversified services and new applications in the future, the fifth-generation mobile conmmnication system （5G） has arisen. Resources are increasingly scarce in the @namic time-vary...To meet the booming development of diversified services and new applications in the future, the fifth-generation mobile conmmnication system （5G） has arisen. Resources are increasingly scarce in the @namic time-varying of 5G networks. Allocating resources effectively and ensuring quality of service （QoS） requirements of multi-seiwices come to be a research focus. In this paper, we utilize effective capacity to build a utility function with multi-QoS metrics, including rate, delay bound and packet loss ratio. Taking advantage of opportunity cost （OC）, we also propose a multi-QoS guaranteed resource allocation algm＇ithm for multi-services to consider the future condition of system. In the algorithm, according to different business characteristics and the theory of OC, we propose different selection conditions for QoS users and best effort （BE） users to choose more reasonable resources. Finally, simulation results show that our proposed algorithm achieves superior system utility and relatively better fairness in multi-service scenarios.展开更多
针对异构认知无线电网络(cognitive radio networks,CRN)共存的情况,提出了FQMAC(fair and Qo S guaranted MAC)协议。采用信标帧同步,将时间划分为信标周期,在信标周期内分别进行信道感知、信道协商和数据传输;将被其他异构网络的次用...针对异构认知无线电网络(cognitive radio networks,CRN)共存的情况,提出了FQMAC(fair and Qo S guaranted MAC)协议。采用信标帧同步,将时间划分为信标周期,在信标周期内分别进行信道感知、信道协商和数据传输;将被其他异构网络的次用户(secondary user,SU)占用的信道也作为可用信道。根据信道质量将所有可用信道划分等级,根据次用户业务特征将次用户划分等级。等级高的次用户优先预约等级高的信道。对信道协商阶段的合理时长通过建立马尔可夫链模型进行了理论分析,得出其合理时长的理论值。仿真实验结果证明FQMAC可以较好地提升网络的吞吐量,保障了用户的Qo S(quality of service),并实现了较好的公平性。展开更多
当前分布式多媒体系统技术在飞速发展,其核心问题是多媒体流的服务质量(QoS)保证。对于由QoS控制来实现QoS保证,国际上不同组织和团体提出了不同的控制机制和策略。比较著名的有:1)ISO/OSI提出的基于ODP分布式环境的QoS控制,但至今仍停...当前分布式多媒体系统技术在飞速发展,其核心问题是多媒体流的服务质量(QoS)保证。对于由QoS控制来实现QoS保证,国际上不同组织和团体提出了不同的控制机制和策略。比较著名的有:1)ISO/OSI提出的基于ODP分布式环境的QoS控制,但至今仍停留在只给出了用户层的QoS参数说明和编程接口阶段,具体实现QoS控制策略并未提出;2)ATM论坛也提出了QoS控制的策略和实现[3],ATM控制是“连接预定”型(connection and reservation)。展开更多
基金supported by the National Science and Technology Major Project under Grant No.2016ZX03001009-003the Nature and Science Foundation of China under Grants Nos.61471068111 Project of China B16006
文摘To meet the booming development of diversified services and new applications in the future, the fifth-generation mobile conmmnication system （5G） has arisen. Resources are increasingly scarce in the @namic time-varying of 5G networks. Allocating resources effectively and ensuring quality of service （QoS） requirements of multi-seiwices come to be a research focus. In this paper, we utilize effective capacity to build a utility function with multi-QoS metrics, including rate, delay bound and packet loss ratio. Taking advantage of opportunity cost （OC）, we also propose a multi-QoS guaranteed resource allocation algm＇ithm for multi-services to consider the future condition of system. In the algorithm, according to different business characteristics and the theory of OC, we propose different selection conditions for QoS users and best effort （BE） users to choose more reasonable resources. Finally, simulation results show that our proposed algorithm achieves superior system utility and relatively better fairness in multi-service scenarios.
文摘针对异构认知无线电网络(cognitive radio networks,CRN)共存的情况,提出了FQMAC(fair and Qo S guaranted MAC)协议。采用信标帧同步,将时间划分为信标周期,在信标周期内分别进行信道感知、信道协商和数据传输;将被其他异构网络的次用户(secondary user,SU)占用的信道也作为可用信道。根据信道质量将所有可用信道划分等级,根据次用户业务特征将次用户划分等级。等级高的次用户优先预约等级高的信道。对信道协商阶段的合理时长通过建立马尔可夫链模型进行了理论分析,得出其合理时长的理论值。仿真实验结果证明FQMAC可以较好地提升网络的吞吐量,保障了用户的Qo S(quality of service),并实现了较好的公平性。
文摘当前分布式多媒体系统技术在飞速发展,其核心问题是多媒体流的服务质量(QoS)保证。对于由QoS控制来实现QoS保证,国际上不同组织和团体提出了不同的控制机制和策略。比较著名的有:1)ISO/OSI提出的基于ODP分布式环境的QoS控制,但至今仍停留在只给出了用户层的QoS参数说明和编程接口阶段,具体实现QoS控制策略并未提出;2)ATM论坛也提出了QoS控制的策略和实现[3],ATM控制是“连接预定”型(connection and reservation)。
