云计算在短信业务中的应用探讨

分析了短信系统云化的必要性,并从系统云化部署的便利性和云资源使用的高效性两方面考虑设计了云化短信系统的总体架构,并基于资源、业务量和短信业务特征提出了云平台资源的调度策略,对云计算技术在短信业务系统中的应用进行了探讨。     

算力网络资源协同调度探索与应用

算力网络融合了多区域、多层级的算力资源。针对面向用户差异化需求下全域大范围多层次算力资源的弹性灵活调度问题，设计了一个算力网络资源协同调度平台。针对差异化业务需求，该平台可以形成多公有云与私有云之间的算力资源调度策略以及算网资源协同调度策略，实现资源的自动最优分配。同时，该平台能够自动发现、纳管算力资源，并基于新的资源池情况实现分配策略的自动调整，实现用户无感业务扩缩容，以此弹性调度算力资源。     

一种基于SOA的流程调度技术在高分减灾应用示范系统中的应用

针对减灾业务应用多样性、突发性、高时效性、资源共享性等特点,基于现有分布式并行计算平台软件Platform,结合SOA系统架构和流程,实现SOA流程与云平台流程的结合,研究面向高分减灾业务运行的多层级调度策略与协同计算关键技术,完成动态调度业务流程,提供在虚拟化环境下的高性能处理及协同计算能力以及对减灾业务和计算资源进行多层级调度能力。     

小卫星业务调度路由优化

针对小卫星通信链路交换频繁和低资源利用率的问题，提出了一种基于调度的小卫星路由优化策略。建立起小卫星星座模型，根据其运行方向(与赤道平面近似垂直)和所在维度确定链路的实时连接策略，优化其路由路径。面对持续增长的网络业务与有限的星上资源的矛盾，将业务数据包分类为实时性数据包和非实时性数据包，实行加权轮询调度保证其服务质量和资源的利用率。仿真结果证明，相比已有小卫星路由算法，优化的路由算法可以有效减小数据传输时延并增加系统吞吐量。     

基于中继辅助的不等发射功率调度算法的公平性研究

在多用户分集系统中，基于最大化吞吐量的调度算法可使系统获得较高的吞吐量性能，有效的调度可提高系统的用户服务率，提高特定用户的数据传输率，降低单位数据的通信开销。但是，采用最大化系统吞吐量的调度方式没有直接考虑每个用户的需求，故调度算法的公平性问题值得探讨。研究了基于中继辅助调度的中断调度策略和随机选择调度策略的公平性问题，并对结果进行了详细的比较。     

P2PVoD系统中基于节点服务能力的数据调度算法

P2P流媒体系统的数据调度算法直接影响系统整体性能和服务质量,一直是P2P流媒体系统研究的核心和热点问题。本文在给出了节点服务能力的定义和计算方法后,结合BT中的RarestFirst策略和VoD业务特点,提出了一种适合P2PVoD系统的基于节点服务能力的推拉相结合的数据调度算法。本算法考虑了节点的异构性和流媒体业务的时问敏感性,充分利用了推拉两种调度模式的优点,能更好的利用节点资源,减轻服务器负载,减小系统传输延迟。     

基于IEEE802.16e的多级别业务调度算法研究

在IEEE802.16e标准中,保证QoS的调度算法一直是人们研究的热点,它涉及到从单一业务到多级别业务的调度服务.对多级别业务调度的支持是保证系统性能的重要技术之一.本文针对多级别业务常用的分层调度和联合调度策略,从系统吞吐量、QoS性能和公平性等方面对之进行的仿真分析和性能比较.仿真结果表明联合调度策略综合性能较好.     

蜂窝网络中切换业务优先的资源调度算法

下一代无线蜂窝网络将提供具有不同服务质量要求的多种类型的业务,同时为了提高频率资源利用率,小区的划分越来越小,切换也越来越频繁。本文在针对多业务类型、切换频繁的蜂窝网络,提出了一种切换业务优先的分层资源调度策略。在调度过程中,优先考虑切换业务的数据包,从而降低了切换掉话率,系统整体性能得到提高。     

基于态势感知的OTT智能调度研究与实践

针对现网OTT业务传统调度系统存在的痛点，从运营商的角度提出了一种基于态势感知的智能调度设想，构建了智能调度系统的框架，搭建了智能调度系统原型并投入现网应用，极大提升了OTT业务调度的智能化和精准度，进一步增强OTT业务系统整体运维和运营能力。     

混合业务场景下的合作博弈动态资源管理策略

LTE系统对各类多媒体业务的承载能力对其未来应用至关重要。面向混合业务场景，本文建立了合作博弈模型描述各类业务之间的关系，并提出了一种动态资源管理策略。系统根据当前业务状态为各类业务分配所需资源，进而，根据业务属性确定各个用户的调度优先级。结果表明所提出的资源管理策略能够有效提高系统频谱效率及各类业务的服务质量。     

An emulator framework for a new radio resource management for QoSguaranteed services in W-CDMA systems

In the context of third-generation (3G) systems a mix of services with different requirements are expected. Consequently, packet scheduling mechanisms for quality of service (QoS) guarantees will play a key role. This paper proposes a new scheduling strategy that makes consistent the target quality in the radio link with the priority level assigned to each user. The performance of such a strategy is assessed by system level simulations and, in order to gain more insight into the difficulties of this optimization problem, it is compared to other alternatives. This work is part of the Wineglass project, within the Fifth Framework Program of the European Commission (IST), where a real time demonstrator including the radio resource management tasks is being developed. Thus, an implementation approach of the proposed scheduling is also described. The implementation is based on lookup tables and this approach is validated by simulation     

基于满意度准则采用混合波束成型预编码的调度方法

为了满足未来无线宽带网络中多种服务质量(QoS)要求业务并存的需求,该文提出一种多天线下行系统中结合混合波束成型预编码技术基于满意度的调度方法。该调度方法联合考虑用户的QoS要求及其信道质量,灵活地使用随机波束成型和迫零波束成型预编码技术,并通过惩罚机制避免特定用户占用超出其需求的带宽,更有效地为用户分配令其满意的资源,使各种QoS要求的用户获得满意的服务。仿真结果证明,与现有的方法相比,该文提出的方法在保证用户服务质量的同时,能更好地利用系统资源。     

HSDPA中支持实时业务的调度算法在吞吐量方面的仿真分析

随着移动通信技术的飞速发展,未来的移动通信系统将以数据业务为主,所以无线分组调度算法将成为影响系统性能和保证用户服务质量的关键所在。在HSDPA系统中无线资源管理是通过分组调度算法来实现的。理想的调度算法应满足各类业务的QoS要求和用户之间的公平性,使系统资源利用率达到最大。主要介绍了EXP算法和M-LWDF算法,并对两种算法在吞吐量方面进行了仿真分析,说明了M-LWDF算法具有更高的吞吐量。     

A cellular neural network and utility-based radio resource scheduler for multimedia CDMA communication systems

The paper proposes a cellular neural network and utility (CNNU)-based radio resource scheduler for multimedia CDMA communication systems supporting differentiated quality-of-service (QoS). Here, we define a relevant utility function for each connection, which is its radio resource function weighted by a QoS requirement deviation function and a fairness compensation function. We also propose cellular neural networks (CNN) to design the utility-based radio resource scheduler according to the Lyapunov method to solve the constrained optimization problem. The CNN is powerful for complicated optimization problems and has been proved that it can rapidly converge to a desired equilibrium; the utility-based scheduling algorithm can efficiently utilize the radio resource for system, keep the QoS requirements of connections guaranteed, and provide the weighted fairness for connections. Therefore, the CNNUbased scheduler, which determines a radio resource assignment vector for all connections by maximizing an overall system utility, can achieve high system throughput and keep the performance measures of all connections to meet their QoS requirements. Simulation results show that the CNNU-based scheduler attains the average system throughput greater than the EXP [9] and the HOLPRO [5] scheduling schemes by an amount of 23% and 33%, respectively, in the QoS guaranteed region.     

一种基于QoS下行资源调度的改进算法

针对LTE系统中用户无线承载QoS要求的不同,提出了一种考虑用户QoS的下行链路资源动态调度改进算法.改进算法在比例公平算法的基础上引入承载的QoS权重值,通过计算出的承载调度值的大小来决定调度承载的顺序.仿真结果表明,改进调度算法可以有效地满足承载的QoS要求,同时保证了用户间的公平性和系统的吞吐量.     

A QoS Aware Dynamic Scheduling Scheme Using Fuzzy Inference System for IEEE 802.16 Networks

Providing quality of service (QoS) for diverse multimedia services is an important issue in IEEE 802.16 (WiMAX) networks. A scheduling mechanism that satisfies the QoS requirements has become more important for multimedia networks. In addition, scheduling algorithms for wireless networks are much more complex than that of wired networks because of channel quality variations and radio resource limits. This paper introduces a QoS Aware Scheduling System, based on fuzzy logic, for traffic management in WiMAX point-to-multi-point (PMP) networks. The proposed method attempts to guarantee delay and throughput QoS criteria. It considers QoS criteria and radio quality of each user in decision making processes. A series of simulation experiments have been carried out to evaluate the performance of the proposed scheduling system. The results show that the proposed method performs effectively to achieve QoS criteria and attains significant system performance for different types of traffic.     

Efficient radio resource management for wireless multimedia communications: a multidimensional QoS-based packet scheduler

Future wireless multimedia systems will support a variety of services with diverse range of capabilities and bit rates. For these systems, it is highly desired for real-time conversational and non-real-time services to efficiently share the available channels and bandwidth in an optimized way. The partitioned resource shaping with either fixed or a slow changing dynamic, proposed for conventional packet scheduling techniques, proves difficult and inefficient under fast-changing dynamics of radio channel and traffic. By taking into account almost all the aspects (dimensions) of quality-of-service (QoS) provisioning, the proposed unified fast dynamic multidimensional QoS-based packet scheduler (MQPS) in this paper elegantly and efficiently encapsulates features of many possible packet scheduling strategies. MQPS applies an optimization and tuning mechanism to packet scheduling weights to adopt the most appropriate packet scheduling and channel assignment strategy in response to the varying traffic and radio channel conditions. As an example, the technique is applied to a high-speed downlink packet access (HSDPA) system. It is shown that MQPS provides significantly better performance than existing techniques by satisfying all the requirements of a successful QoS provisioning to maximum possible level simultaneously.     

H-CRAN网络下联合拥塞控制和资源分配的网络切片动态资源调度策略

针对异构云无线接入网络(H-CRAN)网络下基于网络切片的在线无线资源动态优化问题,该文通过综合考虑业务接入控制、拥塞控制、资源分配和复用,建立一个以最大化网络平均和吞吐量为目标,受限于基站(BS)发射功率、系统稳定性、不同切片的服务质量(QoS)需求和资源分配等约束的随机优化模型,并进而提出了一种联合拥塞控制和资源分配的网络切片动态资源调度算法。该算法会在每个资源调度时隙内动态地为性能需求各异的网络切片中的用户分配资源。仿真结果表明,该文算法能在满足各切片用户QoS需求和维持网络稳定的基础上,提升网络整体吞吐量,并且还可通过调整控制参量的取值实现时延和吞吐量间的动态平衡。     

A Cross-Layer Packet Scheduling Scheme for Multimedia Broadcasting via Satellite Digital Multimedia Broadcasting System [Advances in Mobile Multimedia]

In recent years, multimedia content broadcasting via satellite has attracted increased attention. The satellite digital multimedia broadcasting (S-DMB) system has emerged as one of the most promising alternatives for the efficient delivery of multimedia broadcast multicast service (MBMS). The design of an efficient radio resource management (RRM) strategy, especially the packet scheduling scheme, becomes a key technique for provisioning multimedia services at required quality of service (QoS) in S-DMB. In this article, we propose a novel cross-layer packet scheduling scheme that consists of a combined delay and rate differentiation (CDRD) service prioritization algorithm and a dynamic rate matching (DRM)-based resource allocation algorithm. The proposed scheme considers multiple key factors that span from the application layer to the physical layer, aiming at simultaneously guaranteeing diverse QoS while utilizing radio resources efficiently under the system power and resource constraints. Simulation results demonstrate that the proposed cross-layer scheme achieves significantly better performance than existing schemes in queuing delay, jitter, and channel utilization.     

基于传输块调度的WCDMA上行负荷控制算法

在WCDMA系统中,小区的无线资源管理通常是在无线网络控制器(RNC)节点内完成.然而,专用传输信道上传输格式可以逐帧改变,基于传输格式的快速变化实际上构成一种无线资源控制能力。这种控制能力是由UE和Node B的MAC实体以及物理层协同完成的,完全不需要三层信令参与。该文根据WCDMA专用传输信道传输格式的快速变化能力,结合基于类的QoS策略,针对上行信道提出一种负荷控制算法,用以支持全分组业务。研究结果表明,在多业务环境下,各个用户能公平共享无线资源、同时能够实现实时业务时延保证。