DS-CDMA system outer loop power control and improvement for multi-service

When a new user accesses the CDMA system, the load will change drastically, and therefore, the advanced outer loop power control （OLPC） technology has to be adopted to enrich the target signal interference ratio （Silt） and improve the system performance. The existing problems about DS-CDMA outer loop power control for multi-service are introduced and the power control theoretical model is analyzed. System simulation is adopted on how to obtain the theoretical performance and parameter optimization of the power control algorithm. The OLPC algorithm is improved and the performance comparisons between the old algorithm and the improved algorithm are given. The results show good performance of the improved OLPC algorithm and prove the validity of the improved method for multi-service.

SERVICE-AWARE BASED FUZZY ADMISSION CONTROL SCHEME IN MULTI-SERVICE NETWORKS

Multi-service aggregated transmission is the direction of IP network. Providing different Quality of Service (QoS) assurance for different services has become a crucial problem in future network. Admission control is a vital function for multi-service IP network. This paper proposes a novel fuzzy admission control scheme based on coarse granularity service-aware technique. Different service has discriminative sensitivity to the same QoS characteristic parameter in general. The traffic class can be perceived by the service request parameter and the proposed QoS function. And requirements of dif- ferent applications can be met by maintaining the life parameter. From simulation results, the proposed scheme shows a better QoS provisioning than those traditional fuzzy logic based methods under the same admission probability.

Study on Task Assignment of Two-stage Multi-service Capability Port Logistics Service Providers

This paper mainly studies the problem of multi-task assignment of providers in port logistics service supply chain.As a core enterprise,port plays the role of logistics service integrator.With the continuous development of industrial integration,logistics service providers not only provide one kind of logistics service,but also develop into composite suppliers who capable of providing a variety of logistics services.This paper studies the task assignment problem of multi-service capability providers in the port logistics service supply chain.The two-stage logistics service provider task assignment model was built,which is based on the mixed evaluation method(including MOORA and FMEA)and the multi-objective planning method.Eventually,the effectiveness of the model method was verified by combining with an example.

COMBINED ADMISSION CONTROL AND SCHEDULING IN MULTI-SERVICE NETWORKS

Providing the required metrics for different service respectively is a basic characteristic in multi-service networks. The different service can be accessed and forwarded differently to provide the different transmission performance. The state information between admission control and scheduling can be exchanged each other by the defined correlation coefficient to adjust the flow distribution in progress. The priority queue length measured by scheduler implicitly can describe the priority flows load. And the fair rate can describe the non-priority flows load. Different admission decision will be made according to the state of scheduler to assure the time-delay upper threshold for the priority flows under heavy load and the fairness for elastic flows in light load, respectively. The stability condition was conduced and proved. Simulation results show the policy can ensure both the delay for the priority flows and the minimal throughput for non-priority flows.

THE STUDY OF SCP OVERLOAD CONTROL IN MULTI-SERVICE ENVIRONMENT

This paper first gives a SCP abstract model, then SCP’s overload detection and maximum processing capability are discussed quantitatively. Based upon dynamic adjustment, a new two-level SCP overload control algorithm is proposed. Theoretical analysis and simulation prove the algorithm’s effectiveness and fairness.

DESIGN OF MULTI-SERVICE SDH NETWORKS: FORMULATION AND HEURISTICS

Multi-service SDH networks support both packet- and circuit-switched traffic. Optimal design of such a network means to guarantee the circuit connections and configure a logical packet-switched topology with lowest congestion. This letter first formulates the problem as a mixed integer linear programming, which achieves optimal solution but has high computation. Then a heuristic algorithm is proposed to yield near-optimal solution efficiently. Performance of the algorithm is verified by an example.

STUDY ON THE ACCOUNT-SHARING STRATEGY FOR MULTI-SERVICES IN IMS ONLINE CHARGING MECHANISM

A prepaid subscriber is allowed to simultaneously implement multiple services in online charging mechanism of IP Multimedia Subsystem (IMS). It is a noteworthy discussion to effectively distribute the limited account resources among concurrent services. An account-sharing algorithm is proposed for multi-services,which introduces resource reclamation and redistribution processes based on the resource reservation of standard specifications and dynamically adjusts them according to the changes of Quality of Service (QoS). Three performance indexes are investigated in the simulation experiments, which are average number of accommodated sessions, average number of completed ses- sions, and average number of iterations per accommodated session. The results show that in the normal QoS level, the three indexes of the proposed algorithm averagely increase by 18.7%, 5.4%, and 3.1% compared with the Prepaid Credit Distribution (PCD) algorithm, and by 2.1%, 1.0%, and 1.8% compared with the Prepaid Credit Reclaim (PCR) algorithm. In the poor QoS level, the performance advantages are greater, which averagely increase by 29.1%, 7.1%, and 2.8% compared with PCD, and by 9.4%, 4.1%, and 3.6% compared with PCR.

Echo-state-network classification based multi-services awareness in high-speed optical passive networks

With the challenge of great growing of services diversity,service-oriented supporting ability is required by current high-speed passive optical network( PON). Aimed at enhancing the quality of service( Qo S) brought by diversified-services,this study proposes an echo state network( ESN)based multi-service awareness mechanism in 10-Gigabite ethernet passive optical network( 10GEPON). In the proposed approach,distributed architecture is adopted to realize this ESN based multi-service awareness. According to the network architecture of 10G-EPON,where a main ESN is running in OLT and a number of ESN agents works in ONUs. The main-ESN plays the main function of service-awareness from the total view of various kinds of services in 10G-EPON system,by full ESN training. Then,the reservoir information of well-trained ESN in OLT will be broadcasted to all ONUs and those ESN agents working in ONUs are allowed to conduct independent service-awareness function. Thus,resources allocation and transport policy are both determined only in ONUs. Simulation results show that the proposed mechanism is able to better support the ability of multiple services.

煤矿信息综合承载网标准研究制定

为满足煤矿监控、定位、视频、音频、远控、5G等不同业务对时延、可靠性、带宽等指标的不同需求,煤矿信息综合承载网应具有下列功能:①网络切片功能,支持FlexE接口技术或信道化子接口技术,将端口带宽资源划分到不同网络切片中;不同网络切片之间的业务彼此隔离承载,互不影响。②网络切片在线带宽扩容功能,带宽调整过程中业务不出现丢包。③网络切片设置掉电保护功能。④符合IEEE 802.3和TCP/IP协议,支持IPv6协议和IPv6业务承载,支持IPv4、IPv6业务同时承载。⑤支持万兆光接口、千兆光接口、10/100/1000 Mbit/s自适应接口,核心与汇聚节点宜支持5万兆及以上光接口。⑥宜采用环形或双环结构。⑦业务质量实时监测功能,实时监测指定业务的时延、抖动和丢包率情况。⑧1588v2时钟同步功能,支持5G基站业务接入。煤矿信息综合承载网的主要技术指标应满足下列要求:①光端口传输距离应≥20 km;电端口传输距离应≥100 m。②骨干网传输速率应≥10 Gbit/s;接入网传输速率应≥1 Gbit/s。③不同帧长的丢包率均≤0.01%(在70%网络流量负载条件下)。④单节点传输时延应≤1 ms(当以太网帧帧长度为1518 byte时)。⑤节点转发抖动≤100μs。⑥单接口支持切片数量应≥5。⑦FlexE接口技术最小带宽应≤1 Gbit/s;信道化子接口技术最小带宽应≤2 Mbit/s。⑧网络重构自愈时间应≤50 ms。⑨在电网停电后,承载网设备在备用电源下的连续工作时间应≥4 h。

杜甫“陷贼”补辨

杜甫从鄜州潜回长安的实际心思可归纳为三端:一是使自己由“逃难者”变为“国难承受者”即沦陷区“长安民”的一员;二是出于对国家命运的关心,亲自感受、观察叛军占领下的长安形势;三是潜回长安,实际上是向官军靠拢。杜甫诗中“此道昔归顺”句,句意是“逃脱叛军占领下的长安归向朝廷”,“归顺”系用肃宗诏书中语。杜甫《奉谢口敕放三司推问状》中“贼庭”指叛军占领区。

建筑文化事业与旗手高介华

该文回顾建筑与文化学术讨论会从1989年第一届在湖南长沙岳麓书院举办起,到第十五届的历程,论及“中国建筑文化研究文库”出版的划时代的历史意义、科学意义和文化意义。阐述了中国建筑文化事业的旗手高介华先生的卓越贡献,表达了以高先生为榜样,将中国建筑文化事业继续发扬光大的决心。

城轨领域综合承载的列车以太网通信网络应用

本文介绍了常用交换式以太网环网与线性网拓扑的优缺点,并以实际应用项目为依托,介绍了列车通信网络承载信号系统通信网络的方案。该方案可以承载整车的通信网络,为智慧城轨列车通信综合承载提供了一种发展方向。

IP承载网络技术演进方向研究

互联网业务的快速发展对IP承载网络提出了确定性、高可靠性、大带宽、弹性连接等新要求,而运营商业务本身的发展对IP承载网络提出了降本增效、差异化承载、安全可信的需求。基于业务演进对网络的需求、IP新技术的发展,对IP承载网络演进方向开展讨论,旨在打造高质量、差异化承载底座,满足多样化业务需求,提升网络价值,降低网络运营成本,筑牢网络安全底座,保障网络安全。

面向铁路5G-R和GSM-R系统的SPN承载方案研究与试验

基于铁路5G-R、GSM-R系统业务场景和全球商用部署的SPN创新承载技术,面向铁路5G-R系统特殊应用,建立小颗粒硬管道业务模型和L3VPN到边缘的分组业务模型,提出采用SPN双平面组网并综合承载现网GSM-R业务的E1CBROver小颗粒硬管道方案。SPN综合承载方案满足5G-R、GSM-R系统铁路行车控制类业务高可靠、高安全的硬隔离承载需求,以及5G-R系统大带宽视频数据业务灵活调度、智能运维的演进需求。提出的方案已完成基于SPN的5G-R、GSM-R基站和核心网端到端功能及可靠性试验验证,试验结果指标优于标准要求,证明面向铁路5G-R、GSM-R系统的SPN综合承载方案安全可行。

5G承载网数字孪生典型场景与应用方案探索

近年来,数字孪生技术在承载网智能化管控领域的应用成为一个新的热点和研究方向。国内外各研究机构纷纷开展相关应用场景的探索、标准化研究等工作,产业生态正逐步形成。基于当前的信息通信领域数字孪生技术研究,分析了5G承载网管控面临的新挑战,探索了数字孪生技术在5G承载网的应用场景和需求。基于这些典型应用场景,提出了数字孪生应用服务方案设计,以及仿真器和模拟器组件的功能和数据描述。最后列举了5G网络切片资源划分和变更仿真功能的应用案例。

互联网重点应用服务端算力分布及其对用户感知的影响

互联网应用在服务端的算力分布会对用户感知产生一定影响。选取互联网头部应用,以流量作为主要度量,通过采集和分析现网数据,研究其服务端的算力分布情况和流量远距离绕转情况。同时,结合用户感知数据,对流量绕转与实际感知进行关联分析。分析发现,互联网应用的服务端算力分布存在不平衡现象,服务调度中也存在非最优调度。互联网应用方应与运营商密切协作,减少流量绕转,协同改善用户感知和网络效率。

威廉·施特恩的形而上学人格主义

威廉·施特恩认为,只有当形而上学存在时,科学和价值哲学才会存在,因此,应充分地阐明价值领域的内在有效性和规范。他在发展其价值哲学时,从“先验价值理论”入手,认为主体自身与价值相关联,价值不是独立的存在。关于“自身价值”“辐射性价值”和“服务性价值”的区分,为施特恩的价值哲学提供了决定性的方向。“自身价值”概念是其价值哲学的关键,在他看来,以自我为中心是所有价值学的基本事实。在其中,价值内省起着决定性的作用,是处于价值宇宙中心的人确认其自身的中心价值和非中心价值的行为。

A Bitcoin Address Multi-Classification Mechanism Based on Bipartite Graph-Based Maximization Consensus

Bitcoin is widely used as the most classic electronic currency for various electronic services such as exchanges,gambling,marketplaces,and also scams such as high-yield investment projects.Identifying the services operated by a Bitcoin address can help determine the risk level of that address and build an alert model accordingly.Feature engineering can also be used to flesh out labeled addresses and to analyze the current state of Bitcoin in a small way.In this paper,we address the problem of identifying multiple classes of Bitcoin services,and for the poor classification of individual addresses that do not have significant features,we propose a Bitcoin address identification scheme based on joint multi-model prediction using the mapping relationship between addresses and entities.The innovation of the method is to(1)Extract as many valuable features as possible when an address is given to facilitate the multi-class service identification task.(2)Unlike the general supervised model approach,this paper proposes a joint prediction scheme for multiple learners based on address-entity mapping relationships.Specifically,after obtaining the overall features,the address classification and entity clustering tasks are performed separately,and the results are subjected to graph-basedmaximization consensus.The final result ismade to baseline the individual address classification results while satisfying the constraint of having similarly behaving entities as far as possible.By testing and evaluating over 26,000 Bitcoin addresses,our feature extraction method captures more useful features.In addition,the combined multi-learner model obtained results that exceeded the baseline classifier reaching an accuracy of 77.4%.

新莽至东汉初年南阳汉画中的门吏服装考

新莽至东汉初年的南阳陈棚彩绘画像石墓中出现了大量的门吏形象,反映了南阳地区这一时期不同身份门吏的服装特点。根据门吏所持物品不同,可将其分为拥盾门吏、执笏门吏、执戟门吏、执棨戟门吏、执金吾门吏和拥彗门吏。拥盾门吏多为门亭长,戴武弁大冠;执笏门吏多为门大夫,戴进贤冠;执戟门吏与执棨戟门吏为郎官形象,戴武弁大冠;拥彗门吏为门卒,戴赤色平上帻;执金吾门吏为执金吾,戴赤色介帻。门亭长等皆为汉代门者,因此在汉画像中多以门吏形象出现在墓门或门柱上,以起到宿卫亡灵的作用。其服装亦与各自的身份相称。

基于IUV-5G的FlexE虚拟组网设计

5G技术的快速发展正在推动网络的升级和转型,其中5G承载网作为5G网络的重要组成部分,需要具备高速、高效、灵活等特点。为了满足这些要求,FlexE技术成为当前5G承载网中的热门话题之一。探讨了FlexE技术在5G网络中的应用,同时考虑到云计算、5G通信和数据中心应用中出现的传输带宽有限和网络管理困难等问题,使用FlexE技术标准和原理进行分析,基于IUV-5G虚拟仿真平台并结合5G网络切片技术,验证了在SPN设备上采用FlexE技术进行组网设计的可行性。