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.

基于SD-WAN混合链路实现规模无关快速路由切换的设计

软件定义广域网(Software Defined Wide Area Network,SD-WAN)作为被应用于广域网连接的新型网络技术,使用混合链路为广域网流量提供多条Overlay转发路径,配合智能应用选路等技术为网络流量提供最优路径动态选择的能力。提出了一种基于混合链路多Overlay隧道实现网络规模解耦下快速路由切换的新型设计,在广域网链路中断后提供路由收敛时间确定性上界保证,给出关键的数据结构及工作流程,对相关工程实施具备较好的指导作用。

基于SD-WAN的企业快速组网探究与应用

企业广域网组网技术,具有传输效率不高、网络延迟大等缺陷,不能满足现代企业高效率传输要求。SD-WAN是当前较为先进的企业组网技术,优势颇多,将其应用在企业中,不仅可以和现有的多协议标记交换(Multi-Protocol Lab Switching,MPLS)实现无缝对接,保证业务的连续性,还能在端到端监控网络状态。鉴于此,本文即围绕SD-WAN展开,对基于SD-WAN的企业快速组网深入研究。

Network pharmacology to decipher the mechanism of Danggui Longhui Wan against chronic myeloid leukemia

Chronic myeloid leukemia(CML)is a hematopoietic myeloproliferative disorder.The Chinese prescription Danggui Longhui Wan(DGLHW)has been utilized in CML treatment,but its underlying mechanisms remain unclear.In this study,we gathered 794 constituents,1249 drug targets,1654 disease genes and 129 intersection genes.GO and KEGG were used to analyze the function of these genes.Compatibility of prescription study showed that monarch drug,minister drug,assistant and guide drug played a synergistic role in the treatment of CML.In addition,we obtained 20 hub genes and 12 key components.Molecular docking indicated that the main compounds and core proteins had good binding ability.The results of this study also showed that DGLHW might play a role in the treatment of CML by affecting MAPK,PI3K/AKT,FoxO and p53 signaling pathways.

Network pharmacology and molecular docking analysis reveal insights into the molecular mechanism of Gualou Qumai Wan in clear cell renal cell carcinoma

Background:To initially clarify the potential therapeutic targets and pharmacological mechanism regarding Gualou Qumai Wan(GQW),a kind of traditional Chinese medicine(TCM),in clear cell renal cell carcinoma(ccRCC)by virtue of the network pharmacology analysis and molecular docking analysis.Methods:The screening of bioactive components and targets of GQW was based on the Traditional Chinese Medicine System Pharmacology(TCMSP)and the UniProt platform served for standardizing their targets.Online Mendelian Inheritance in Man(OMIM),PharmGkb,TTD,DrugBank and GeneCards databases were searched to collect the disease targets of ccRCC.Cytoscape assisted in constructing herb-compound-target(H-C-T)networks.The STRING database was searched for constructing the target protein-protein interaction(PPI)networks,while the R programming language served for analyzing GO functional terms and the KEGG pathways related to potential targets.Analyses of core genes related to survival and tumor microenvironment(TME)were conducted respectively based on the GEPIA2 database and TIMER 2.0 database.Human Protein Atlas(HPA)and The Cancer Genome Atlas(TCGA)helped to obtain core genes’protein expression as well as transcriptome expression level.Autodock Vina software validated the molecular docking regarding GQW components and pivotal targets.Results:The constructed H-C-T networks mainly had 33 compounds and 65 targets.A topological analysis of the PPI network identified that ESR1,AKT1,HIF1A,PTGS2,TP53 and VEGFA serve as core targets in the way GQW affects ccRCC.According to the GO and KEGG pathway enrichment analyses,the effects of GQW are mediated by genes related to hypoxia and oxidative stress as well as the Chemical carcinogenesis-receptor activation and PI3K-Akt signaling pathways.AKT1 shows a close relation to the recruitment of various immune cells and can remarkably affect disease prognosis according to reports.Molecular docking and molecular dynamics simulations showed that diosgenin has higher affinity with core targets.Conclusion:The study makes a comprehensive explanation of the biological activity,potential targets,as well as molecular mechanism regarding GQW against ccRCC,which promisingly assists in revealing the action mechanism of TCM formulae in disease treatment and the respective and scientific basis.

基于SD-WAN组网的中小企业数智化应用研究

引言中小企业在经济体系中占据核心地位,其数字化转型对于提升企业竞争力和促进经济创新至关重要。本文探讨了SD-WAN(软件定义广域网)技术在企业数智化转型升级中的应用,分析了企业数智化组网存在的问题,介绍了SD-WAN的总体架构及其特性。以F集团为例,其数智化实践结果表明,SD-WAN组网技术可满足AGV多基地的网络全覆盖,有效提升了网络效率与安全性,并降低了企业的整体建设成本,为企业数智化发展提供了积极的探索与实践。

SD-WAN结合边缘智能在纸板生产车间的研究和实践

文章研究了软件定义广域网(Software-Defined Wide Area Networking,SD-WAN)结合边缘智能在瓦楞纸板生产车间中的应用。该研究的目标是提升瓦楞纸板生产车间的网络性能、安全性和管理效率。通过使用SD-WAN技术,该车间可以实现网络虚拟化、智能路由和实时监控,从而提高网络通信的可靠性和稳定性。SD-WAN与边缘智能的结合使网络资源得以高效利用,优化路由决策,并实现主动的网络管理。该研究对于推动工业环境中的网络技术发展具有重要意义,为瓦楞纸板制造业提供了提高生产效率、降低成本以及提升运营灵活性的机遇。

基于WAN环境的一种数据传输方式的实现

文中在一种基于ＷＷＷ的分布式信息系统的背景下，提出一种在广域网（ＷＡＮ）的环境中安全传输数据的解决方案。利用ＰＢ的数据管理技术，实现了方便、灵活的数据传输。数据传输功能是从分布的各节点的数据库中向总数据库传输数据，为系统提供数据基础。

高效灵活的双WAN口路由器应用详解

双WAN口路由器技术已成熟,合理应用好双WAN口路由器能构建高效灵活的网络。在对多款该类型路由器进行了真实网络环境下的调试后,达到了稳定运行的目标,并以Cisco公司生产的一款企业级路由器为蓝本,详细介绍了该类型路由器与一般路由器相比所独具的五大功能的实现方法,具有高速、安全、稳定的特点,为广大中小企业提供了低成本的网络接入方案。

六味地黄丸调节肠道微生物组平衡抑制卵巢早衰小鼠的氧化应激

背景:研究表明,卵巢早衰患者肠道菌群结构发生变化,肠道菌群失调可能是卵巢早衰发生的重要机制之一。目的:探讨六味地黄丸对环磷酰胺诱导卵巢早衰小鼠氧化应激和肠道微生物群的影响。方法:45只雌性ICR小鼠随机分为3组:空白组(正常小鼠)、模型组(卵巢早衰小鼠)、六味地黄丸组,后2组小鼠一次性腹腔注射环磷酰胺(120 mg/kg)制备卵巢早衰小鼠模型,造模成功后六味地黄丸组小鼠连续灌胃六味地黄丸(1.56 g/kg)28 d,其余2组灌胃等量生理盐水28 d,灌胃结束后取材。每周记录小鼠体质量,计算卵巢指数,苏木精-伊红染色观察小鼠卵泡的发育情况,ELISA法检测血清抗苗勒管激素、雌二醇、促卵泡激素、超氧化物歧化酶、谷胱甘肽过氧化物酶和丙二醛水平,并通过16S rDNA测序检测所有小鼠的肠道微生物组。结果与结论:(1)模型组小鼠的毛发疏松,活力及抓力下降,体质量几乎无增长,卵巢指数下降;六味地黄丸治疗后小鼠的体质量高于模型组,卵巢指数也随之升高(P<0.05)。(2)模型组小鼠动情周期紊乱;六味地黄丸能恢复卵巢早衰小鼠的发情周期,减少闭锁卵泡数量。(3)模型组小鼠血清中促卵泡激素、丙二醛水平显著升高(P<0.01),血清雌二醇、抗苗勒管激素、超氧化物歧化酶和谷胱甘肽过氧化物酶水平显著下降(P<0.01);六味地黄丸组小鼠血清促卵泡激素、丙二醛水平显著降低(P<0.01),雌二醇、抗苗勒管激素、超氧化物歧化酶、谷胱甘肽过氧化物酶水平升高。(4)根据16S rDNA测序结果,六味地黄丸可调控肠道微生物群的丰度和多样性,可增加有益菌的相对丰度,KEGG通路分析显示,肠道微生物群与代谢途径、次生代谢产物的生物合成、不同环境中的微生物代谢、氨基酸的生物合成等通路受六味地黄丸的调控。(5)结论:肠道微生物组的改变可能是六味地黄丸治疗卵巢早衰的潜在机制之一。六味地黄丸能调节肠道微生物组结构,增加有益菌数量,减少有害菌数量,从而改善肠道微生态平衡。这种调节作用有助于降低氧化应激水平,进一步抑制卵巢早衰小鼠卵巢氧化应激。

一种面向SD-WAN的协议无感知快速源路由转发方案

针对OpenFlow协议依赖的局限性,提出一种将协议无感知转发(POF)技术应用在软件定义广域网(SD-WAN)环境下的快速源路由转发方案。该方案利用POF的高可编程性特征,通过重构源路由包头字段来封装完整的转发路径,采用POF提供的流指令集实现交换机的包处理算法,且在多级流表设计中采用流水线的方式。通过抽象和重用相同的匹配逻辑,减少了整个网络中的流表条目数,提高系统的转发效率和扩展性。基于Mininet搭建了POF实验平台并在单链路拓扑和多播树拓扑2种环境下通过泛洪流量进行测试,实验结果表明,将POF技术运用在SD-WAN中能够获得更好的源路由转发性能。

FreeS/WAN IPSec安全技术在数字图书馆虚拟专用网控制信息访问中的实现

随着现代图书馆物理馆舍和虚拟馆藏不断扩张,信息安全问题日显突出。Internet协议(IP)是数字图书馆网络赖以构建的基础。然而,IP本身却并不明安全的。因此,要解决数字图书馆的安全问题,必须首先解决的IP的安全问题。本文拟采用VPN解决方案,引入FreeS/WAN IPSec来解决数字图书馆信息访问中的安全问题。

SD-WAN服务持续升级 带来云网络新业态

众所周知,SD-WAN于2015年前后出现,到2018年开始规模商用,经过这几年的发展,已经成为企业组网市场上最热门的业务之一。在海外市场,由于MPLS VPN等专线类业务与SD-WAN差价很大,而且企业上云已经达到了一定规模(企业上云比例超过80%),因此近几年SD-WAN的业务已经从增量市场走向了存量专线替代;而在国内市场,由于企业上云还处在快速增长期,新增的组网需求较为强烈,从我国企业上云比例在40%~50%之间的现状来看,目前SD-WAN的增长主要还是增量的连接需求。