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Primary Ovarian Small Cell Carcinoma of Pulmonary Type: Analysis of 6 Cases and Review of 31 Cases in the Literatures 被引量:1
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作者 Xu Chen Hong-Ling Liu +1 位作者 Jin-Sui Wang Feng-Hui Zhao 《Chinese Medical Sciences Journal》 CAS CSCD 2023年第2期130-137,共8页
Objective Primary ovarian small cell carcinoma of pulmonary type(SCCOPT)is a rare ovarian tumor with a poor prognosis.The platinum-based chemotherapy is the standard treatment.However,there is little research on the c... Objective Primary ovarian small cell carcinoma of pulmonary type(SCCOPT)is a rare ovarian tumor with a poor prognosis.The platinum-based chemotherapy is the standard treatment.However,there is little research on the clinical characteristics of SCCOPT and the potential benefits of other treatments due to its low incidence.The study aims to investigate clinicopathological characteristics and treatment of SCCOPT.Methods We summarized the clinical,imaging,laboratorical and pathological characteristics of 37 SCCOPT cases,in which 6 cases were admitted to the Gansu Provincial Hospital from the year of 2008 to 2022 and 31 cases reported in 17 English and 3 Chinese literatures.Results The median age of the studied SCCOPT cases(n=37)was 56.00(range,22-80)years.Almost 80%of them had a stageⅢorⅣtumor.All patients underwent an operation and postoperative chemotherapy.Nevertheless,all cases had a poor prognosis,with a median overall survival time of 12 months.Immunohistochemical y,the SCCOPT of all patients showed positive expressions of epithelial markers,such as CD56 and sex-determining region of Y chromosome-related high-mobility-group box 2(SOX-2),and negative expressions of estrogen receptor,progesterone receptor,vimentin,Leu-7,and somatostatin receptor 2.The tumor of above 80%cases expressed synaptophysin.Only a few cases expressed neuron-specific enolase,chromogranin A,and thyroid transcription factor-1.Conclusions SCCOPT had a poor prognosis.SOX-2 could be a biomarker to be used to diagnose SCCOPT. 展开更多
关键词 small cell carcinoma of the ovary primary ovarian small cell carcinoma of pulmonary type sex-determining region of Y chromosome-related high-mobility-group box 2 adjuvant chemotherapy
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Enhanced Power Allocation Scheme in Ultra-Dense Small Cell Network 被引量:8
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作者 GAO Yuehong CHENG Lei +2 位作者 ZHANG Xin ZHU Yajun ZHANG Yunfei 《China Communications》 SCIE CSCD 2016年第2期21-29,共9页
A feasible design of ultra-dense Small cell network involves an effective solution to the interference coordination especially in cell edge. In this paper, we propose a channel state and interference aware power alloc... A feasible design of ultra-dense Small cell network involves an effective solution to the interference coordination especially in cell edge. In this paper, we propose a channel state and interference aware power allocation scheme(PAG) as an enhanced solution to improve the system performance, especially for the cell-edge users. Cournot model in Non-cooperative game is employed for power adjustment in Small cell clusters to increase cell-edge users' throughput by considering the power limitation and interference coordination. Additionally, we take iterative Water Filling scheme as a comparison to clarify that the PAG scheme has struck a favorable balance between system efficiency and fairness. Simulation results show that the proposed scheme contributes to the enhancement of edge users' throughput and cells' coverage. Moreover, the scheme is observed to show a stronger adaptability in denser Small cell networks. 展开更多
关键词 Ultra-dense small cell Interferencecoordination Non-cooperative game Utilityfunction
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移动通信Small Cell基站供电解决方案与趋势分析 被引量:6
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作者 胡先红 刘明明 《中兴通讯技术》 2017年第4期51-55,共5页
小型分布式基站Small Cell数量的快速上升对供电方案提出了"零占地"、易部署等新的需求。针对不同的Small Cell基站应用场景,提出了相应的供电解决方案,包括本地交流(AC)供电、本地直流(DC)48 V供电、本地AC和DC 48 V混合供电... 小型分布式基站Small Cell数量的快速上升对供电方案提出了"零占地"、易部署等新的需求。针对不同的Small Cell基站应用场景,提出了相应的供电解决方案,包括本地交流(AC)供电、本地直流(DC)48 V供电、本地AC和DC 48 V混合供电、DC拉远供电、以太网供电(POE)供电等。此外,还指出了Small Cell基站供电方案的发展趋势,包括:小型化、模块化、高效节能、绿色、共享、智能互联等。 展开更多
关键词 smallcell 供电解决方案 零占地 模块化
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10G PON承载LTE Small Cell和WLAN的发展应用 被引量:5
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作者 钟秀芳 郭林 +1 位作者 邵岩 贾武 《信息通信技术》 2013年第2期5-8,共4页
PON技术具有多业务接入能力,利用PON技术承载Small Cell和WLAN有效解决了移动覆盖盲点、数据分流的难点。文章在PON技术承载Small Cell和WLAN技术的基础上,针对用户和业务对高带宽的需求及LTE技术的发展,阐述LTE时代利用10G PON技术承载... PON技术具有多业务接入能力,利用PON技术承载Small Cell和WLAN有效解决了移动覆盖盲点、数据分流的难点。文章在PON技术承载Small Cell和WLAN技术的基础上,针对用户和业务对高带宽的需求及LTE技术的发展,阐述LTE时代利用10G PON技术承载Small Cell及WLAN,并给出具体的应用场景,分析其应用优势,提出相关应用建议,消除LTE发展带来的PON承载Small Cell及WLAN的带宽瓶颈问题。 展开更多
关键词 10G无源光纤网络 small cell 无线局域网 长期演进
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Small Cell标准化研究进展及长期演进策略 被引量:2
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作者 曹亘 范斌 +1 位作者 贾川 李福昌 《邮电设计技术》 2015年第9期22-25,共4页
介绍Small Cell全球市场快速发展趋势,总结Small Cell类型及部署场景的发展趋势。介绍3GPP从R8起开始Small Cell相关标准化制定工作,特别在R12阶段,Small Cell标准课题在物理层关键技术和高层网络架构有突破性研究进展。物理层关键技术... 介绍Small Cell全球市场快速发展趋势,总结Small Cell类型及部署场景的发展趋势。介绍3GPP从R8起开始Small Cell相关标准化制定工作,特别在R12阶段,Small Cell标准课题在物理层关键技术和高层网络架构有突破性研究进展。物理层关键技术主要包括Small Cell物理层频谱效率增强、关断及发现技术、基于空口的同步方案;而高层网络架构主要研究用户面与控制面分离的候选架构。最后,展望Small Cell技术演进和网络部署前景,提出中国联通LIGHT-Net研究计划,加快宏微协同组网方案的应用部署。 展开更多
关键词 small cell 网络管理 部署策略
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Advanced Coverage Optimization Techniques for Small Cell Clusters 被引量:2
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作者 HUANG Liang ZHOU Yiqing +3 位作者 WANG Yuanyuan HAN Xue SHI Jinglin CHEN Xunxun 《China Communications》 SCIE CSCD 2015年第8期111-122,共12页
Coverage challenge for small considered to be a optlmlzation is a main cell clusters which are promising solution to provide seamless cellular coverage for large indoor or outdoor areas. This paper focuses on small ce... Coverage challenge for small considered to be a optlmlzation is a main cell clusters which are promising solution to provide seamless cellular coverage for large indoor or outdoor areas. This paper focuses on small cell cluster coverage problems and proposes both centralized and distributed self-optimization methods. Modified Particle swarm optimization (MPSO) is introduced to centralized optimization which employs particle swarm optimization (PSO) and introduces a heuristic power control scheme to accelerate the algorithm to search tbr the global optimum solution. Distributed coverage optimization is modeled as a non-cooperative game, with a utility function considering both throughput and interference. An iterative power control algorithm is then proposed using game theory (DGT) which converges to Nash Equilibrium (NE). Simulation results show that both MPSO and DGT have excellent performance in coverage optimization and outperform optimization using simulated annealing algorithm (SA), reaching higher coverage ratio and throughput while with less iterations. 展开更多
关键词 small cell cluster coverage op- timization particle swarm optimization gametheory
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超密集Small Cell网络下TD-LTE同频干扰电源抑制方法研究 被引量:2
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作者 陈海燕 袁超伟 《现代电子技术》 北大核心 2017年第18期181-183,186,共4页
传统动态ICIC方法通过频率协调避免同一资源被调度,实现同频干扰的抑制,但是该方法在负载过高的环境下,不能完成有效抑制。针对描述的情况,融合同频干扰抑制以及数字同频干扰抑制,提出TD-LTE同时同频双工同频干扰电源抑制方法。其硬件... 传统动态ICIC方法通过频率协调避免同一资源被调度,实现同频干扰的抑制,但是该方法在负载过高的环境下,不能完成有效抑制。针对描述的情况,融合同频干扰抑制以及数字同频干扰抑制,提出TD-LTE同时同频双工同频干扰电源抑制方法。其硬件包括数字模块、同频模块以及同频干扰重建模块,对各模块的组成结构进行设计。给出了该方法的软件流程过程。实验检测结果表明,所提方法具有较高的同频干扰抑制性能,可增加小区边缘用户的吞吐量,增强频带利用率。 展开更多
关键词 超密集small cell网络 TD-LTE同频干扰 电源 抑制
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Outage Performance and Optimal Design of MIMO-NOMA Enhanced Small Cell Networks with Imperfect Channel-State Information 被引量:2
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作者 Zheng Shi Hong Wang +3 位作者 Yaru Fu Guanghua Yang Shaodan Ma Xinrong Ye 《China Communications》 SCIE CSCD 2021年第10期107-128,共22页
This paper focuses on boosting the performance of small cell networks(SCNs)by integrating multiple-input multiple-output(MIMO)and nonorthogonal multiple access(NOMA)in consideration of imperfect channel-state informat... This paper focuses on boosting the performance of small cell networks(SCNs)by integrating multiple-input multiple-output(MIMO)and nonorthogonal multiple access(NOMA)in consideration of imperfect channel-state information(CSI).The estimation error and the spatial randomness of base stations(BSs)are characterized by using Kronecker model and Poisson point process(PPP),respectively.The outage probabilities of MIMO-NOMA enhanced SCNs are first derived in closed-form by taking into account two grouping policies,including random grouping and distance-based grouping.It is revealed that the average outage probabilities are irrelevant to the intensity of BSs in the interference-limited regime,while the outage performance deteriorates if the intensity is sufficiently low.Besides,as the channel uncertainty lessens,the asymptotic analyses manifest that the target rates must be restricted up to a bound to achieve an arbitrarily low outage probability in the absence of the inter-cell interference.Moreover,highly correlated estimation error ameliorates the outage performance under a low quality of CSI,otherwise it behaves oppositely.Afterwards,the goodput is maximized by choosing appropriate precoding matrix,receiver filters and transmission rates.In the end,the numerical results verify our analysis and corroborate the superiority of our proposed algorithm. 展开更多
关键词 imperfect channel-state information(CSI) multiple-input multiple-output(MIMO) non-orthogonal multiple access(NOMA) small cell networks(SCNs)
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Energy Efficient Switch Policy for Small Cells 被引量:1
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作者 GAN Xiaoying WANG Luyang +4 位作者 FENG Xinxin LIU Jing YU Hui ZHANG Zhizhong LIU Haitao 《China Communications》 SCIE CSCD 2015年第1期78-88,共11页
Switch policy is essential for small cells to properly serve variable number of users in an energy efficient way.However,frequently switching small cell base stations(SBSs) may increase the network operating cost,espe... Switch policy is essential for small cells to properly serve variable number of users in an energy efficient way.However,frequently switching small cell base stations(SBSs) may increase the network operating cost,especially when there is an nonnegligible start-up energy cost.To this end,by observing the variety of user number,we focus on the design of a switch policy which minimize the cumulative energy consumption.A given user transmission rate is guaranteed and the capability of SBSs are limited as well.According to the knowledge on user number variety,we classify the energy consumption problem into two cases.In complete information case,to minimize the cumulative energy consumption,an offline solution is proposed according to critical segments.A heuristic algorithm for incomplete information case(HAIIC) is proposed by tracking the difference of cumulative energy consumption.The upper bound of the Energy Consumption Ratio(ECR) for HAIIC is derived as well.In addition,a practical Q-learning based probabilistic policy is proposed.Simulation results show that the proposed HAIIC algorithm is able to save energy efficiently. 展开更多
关键词 heterogeneous network small cell switch policy Q-LEARNING
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A Distributed User Association and Resource Allocation Method in Cache-Enabled Small Cell Networks 被引量:2
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作者 Gongye Ren Hua Qu +2 位作者 Jihong Zhao Shuyuan Zhao Zhirong Luan 《China Communications》 SCIE CSCD 2017年第10期95-107,共13页
Cache-enabled small cell networks have been regarded as a promising approach for network operators to cope with the explosive data traffic growth in future 5 G networks. However, the user association and resource allo... Cache-enabled small cell networks have been regarded as a promising approach for network operators to cope with the explosive data traffic growth in future 5 G networks. However, the user association and resource allocation mechanism has not been thoroughly studied under given content placement situation. In this paper, we formulate the joint optimization problem of user association and resource allocation as a mixed integer nonlinear programming(MINLP) problem aiming at deriving a balance between the total utility of data rates and the total data rates retrieved from caches. To solve this problem, we propose a distributed relaxing-rounding method. Simulation results demonstrate that the distributed relaxing-rounding method outperforms traditional max-SINR method and range-expansion method in terms of both total utility of data rates and total data rates retrieved from caches in practical scenarios. In addition, effects of storage and backhaul capacities on the performance are also studied. 展开更多
关键词 proactive caching user association resource allocation distributed algorithm dual decomposition small cell networks
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Expression of PD1 and BTLA on the CD8^+T Cell and γδT Cell Subsets in Peripheral Blood of Non-Small Cell Lung Cancer Patients 被引量:2
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作者 鲍轶 莫娟芬 +1 位作者 吴加元 曹晨曦 《Chinese Medical Sciences Journal》 CAS CSCD 2019年第4期248-255,共8页
Objective To investigate the expression and regulation of programmed cell death protein 1(PD1),B lymphocyte and T lymphocyte attenuator(BTLA)in peripheral blood of patients with non-small cell lung cancer(NSCLC);to ex... Objective To investigate the expression and regulation of programmed cell death protein 1(PD1),B lymphocyte and T lymphocyte attenuator(BTLA)in peripheral blood of patients with non-small cell lung cancer(NSCLC);to examine the correlation of the mRNA levels between PD and BTLA in NSCLC.Methods Flow cytometry was used to detect the expression of PD1 and BTLA on the surfaces of CD8^+T cells andγδ+T cells in the peripheral blood samples collected from 32 in-patients with stage IV NSCLC and 30 healthy individuals.We compared the expression of PD1 and BTLA on the surfaces ofγδ+T cells in the NSCLC patients with bone metastasis before and after the treatment of zoledronic acid.The correlations of PD1 and BTLA,as well as their ligands were analyzed using Pearson correlation analysis with the cBioPortal data platform.Results The frequency of PD1 on the surfaces of CD8^+T cells was significantly higher than that of theγδT cells in both healthy controls(t=2.324,P=0.024)and NSCLC patients(t=2.498,P=0.015).The frequency of PD1 on CD8^+T cells,rather than onγδ+T cells,was significantly upregulated in advanced NSCLC patients compared with that in healthy controls(t=4.829,P<0.001).The PD1+BTLA+γδT cells of the healthy controls were significantly lower than that of the NSCLC patients(t=2.422,P=0.0185).No differences in percentage of PD1+γδ+and BTLA+γδ+T cells were observed in 7 NSCLC patients with bone metastasis before and after zoledronic acid treatment.PD1 was positively correlated with BTLA in both lung adenocarcinoma(r=0.54;P<0.05)and lung squamous cell carcinoma(r=0.78;P<0.05).Conclusions The upregulation of co-inhibitory molecules occurs on the surfaces of both CD8^+T cells andγδT cells in advanced NSCLC,suggesting that these molecules were involved in regulating the inactivation of CD8^+T cells andγδ+T cells,immune escape and tumor invasion. 展开更多
关键词 CD8^+T cell γδT cell programmed cell death protein 1 B and T lymphocyte attenuator non-small cell lung cancer
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Small Cell发现技术的研究分析
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作者 王振 李贵勇 《电子技术应用》 北大核心 2015年第12期15-17,21,共4页
Small Cell技术是LTE中一项重要的新兴技术,是服务热点区域,企业级用户及室内增强覆盖的必要部署手段,主要用于提升网络容量,优化网络部署。主要通过对LTE-A标准及OFDM技术的研究,同时结合Small Cell的特性,分析了当前Small Cell发现技... Small Cell技术是LTE中一项重要的新兴技术,是服务热点区域,企业级用户及室内增强覆盖的必要部署手段,主要用于提升网络容量,优化网络部署。主要通过对LTE-A标准及OFDM技术的研究,同时结合Small Cell的特性,分析了当前Small Cell发现技术的相关研究现状,最后通过对比对其进行了总结与展望。 展开更多
关键词 小小区 干扰 同步信号 发现信号
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Efficient Resource Allocation Scheme to Maximise Number of Users with Quality of Service Demands in Small Cells
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作者 LIU Peng LI Jiandong LI Hongyan WANG Kan MENG Yun 《China Communications》 SCIE CSCD 2014年第1期34-45,共12页
Small cells have been regarded as an appealing technique to boost resource reuse ratio. On the other hand, their large-scale and self-organised tendency would complicate the interference environment of mobile networks... Small cells have been regarded as an appealing technique to boost resource reuse ratio. On the other hand, their large-scale and self-organised tendency would complicate the interference environment of mobile networks. Meanwhile, traffic class is booming in recent years, which leads to higher demand for net- work designers on Quality of Service (QoS) provision, and therefore users' diverse re- quirements may not be guaranteed in sucff'an interference limited scenario. To maximise the number of users with QoS demands as well as resource reuse ratio, we formulate the resource allocation problem into a multi-objective l0 norm form. It is shown to be NP hard, and an iterative method is employed to approach the optimal solution. Because of its limit of being not adaptive to large-scale networks, we also design a heuristic method based on chordal graph, which, however, could result in per- formance loss when the size of networks is small. Finally, by combining these two meth- ods, we devise a hybrid algorithm such that the allocation performs both efficiently and effectively. Simulation results illustrate the performance of our proposed methods in terms of outage probability and resource reuse ratio. 展开更多
关键词 resource allocation small cells quality of service traffic class chordal graph
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Optimal Deployment Density for Maximum Coverage of Drone Small Cells
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作者 Chao Dong Jiejie Xie +3 位作者 Haipeng Dai Qihui Wu Zhen Qin Zhiyong Feng 《China Communications》 SCIE CSCD 2018年第5期25-40,共16页
With the proliferation of small and mini drones, Drone Small Cells(DSCs) can cooperative multiple drones to provide communication service for ground users as emergency means or supplementary ones of traditional terres... With the proliferation of small and mini drones, Drone Small Cells(DSCs) can cooperative multiple drones to provide communication service for ground users as emergency means or supplementary ones of traditional terrestrial cellular networks. In this paper, we study the fundamental problem of optimizing the deployment density of DSCs to achieve the maximum coverage performance. Most related works do not consider cumulative inter-cell interference when studying the coverage performance of DSCs. First, we derive an approximate and closed-form expression of the cumulative inter-cell interference which comes from both probabilistic Line-of-Sight(Lo S) and Non-Line-of-Sight(NLo S) links. Then, we analyze the coverage performance of DSCs and derive the transcendental function of optimal deployment density to obtain the maximum coverage. Last, we propose an algorithm to get the optimal deployment density with low complexity. We conduct both field experiments and Matlab simulations to verify the correctness of theoretical analysis. In addition, we show the impact of some factors on the relation between the deployment density and coverage performance through extensive numerical simulations. 展开更多
关键词 drone small cells deployment density coverage ratio inter-cell interference
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Small Cell中移动性增强方案研究现状分析 被引量:2
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作者 王东军 符媛柯 +1 位作者 唐伦 陈前斌 《电信科学》 北大核心 2014年第1期73-82,共10页
小蜂窝网络是由比传统宏蜂窝基站发射功率更小的低功率节点形成的多层蜂窝网络。作为LTE-Advanced技术研究的重要内容之一,小蜂窝的发展越来越受到业界的关注。分析评估了移动性管理中多种移动状态估计(MSE)方案的性能指标,同时分析评... 小蜂窝网络是由比传统宏蜂窝基站发射功率更小的低功率节点形成的多层蜂窝网络。作为LTE-Advanced技术研究的重要内容之一,小蜂窝的发展越来越受到业界的关注。分析评估了移动性管理中多种移动状态估计(MSE)方案的性能指标,同时分析评估了蜂窝切换中所涉及的切换指令的保护方案性能以及蜂窝切换方案性能,最后对小蜂窝网络移动性管理面临的挑战和未来的研究方向做出总结。 展开更多
关键词 小蜂窝 LTE-ADVANCED 移动性管理 移动状态估计 切换
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Small Cell Enhancement物理层关键技术研究 被引量:3
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作者 周代卫 周宇 孙向前 《移动通信》 2015年第3期36-41,共6页
作为移动网络解决热点覆盖和数据分流的有效途径,Small Cell在实际部署时仍面临着小区间干扰、移动性管理、回程承载、负荷均衡、维护和优化等难题。为有效克服和优化这些问题,在其演进技术Small Cell Enhancement中,分别从提高频谱效... 作为移动网络解决热点覆盖和数据分流的有效途径,Small Cell在实际部署时仍面临着小区间干扰、移动性管理、回程承载、负荷均衡、维护和优化等难题。为有效克服和优化这些问题,在其演进技术Small Cell Enhancement中,分别从提高频谱效率和协作能力2个方向在关键的物理层提出了一系列潜在技术方案,从而进一步提高系统容量、均衡系统负载,同时更好地兼容现有LTE/LTE-A网络体系。 展开更多
关键词 small cell Enhancement物理层 频谱效率 高效协作
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基于减少切换次数的Small Cell基站布署方法 被引量:1
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作者 邓先德 席志红 《邮电设计技术》 2018年第1期72-75,共4页
最新的LTE/LTE-A网络架构中引入了Small Cell概念,通过增加小型基站的布署来提高热点区域内的通信容量和覆盖范围。小基站的布署将不可避免地引入更多的切换,若将用户终端较多的热点区域内的切换次数降到最低,网络整体性能将得到有效提... 最新的LTE/LTE-A网络架构中引入了Small Cell概念,通过增加小型基站的布署来提高热点区域内的通信容量和覆盖范围。小基站的布署将不可避免地引入更多的切换,若将用户终端较多的热点区域内的切换次数降到最低,网络整体性能将得到有效提升。基于A3切换算法,通过理论分析和NS3软件的仿真验证,发现选择合适的拓扑形状,并且使拓扑与路径保持合理的相对位置关系,可以降低单位长度上的切换次数;同时,当用户终端所在的路径经过多个拓扑单元时,不合理的斜率路径可能会引入不必要的切换次数。 展开更多
关键词 small cell 布署方法 A3切换算法 切换次数 NS3
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Treatment of Skin Reaction Induced by Nivolumab Combined with Radiotherapy in Non-small Cell Lung Cancer:A Case Report 被引量:4
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作者 Zhimei Zhao Shichao Liu +3 位作者 Xiajuan Xu Zhongfa Zhang Keke Nie Youxin Ji 《Chinese Medical Sciences Journal》 CAS CSCD 2018年第3期183-187,共5页
Skin reaction or dermatological toxicities induced by immunotherapy is common.It usually manifests skin rash or erythema and can be cured by skin lotion or steroid.Nivolumab,a human IgG4 programmed cell death protein ... Skin reaction or dermatological toxicities induced by immunotherapy is common.It usually manifests skin rash or erythema and can be cured by skin lotion or steroid.Nivolumab,a human IgG4 programmed cell death protein 1(PD-1)inhibitor,blocks T cells activation preventing signal and allows the immune system to clear cancer cells.Nivolumab was approved in the second-line therapy in squamous cell lung cancer by FDA,with less than 10%unusual skin reaction,like sensory neuropathy,peeling skin,erythema multiforme,vitiligo,and psoriasis.Radiotherapy could aggravate this skin reaction through inflammatory response and promotion of immunity.The combined treatment of anti-PD-1 and radiotherapy represented a new promising therapeutic approach in many studies,but the risk of side effects may be high.We reported a patient with advanced squamous cell lung cancer who suffered from serious skin immune-related adverse events when he was treated with nivolumab and radiotherapy.The immune overreaction of the treatment of anti-PD-1 treatment and radiotherapy might cause these serious skin adverse events.Our report warranted careful workup to reduce the risk of side effects by combinative therapy with anti-PD-1 and radiotherapy. 展开更多
关键词 SKIN reaction nivolumab IMMUNOTHERAPY RADIOTHERAPY NON-small cell LUNG cancer
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Small Cell Enhancement关键技术研究 被引量:2
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作者 周代卫 高瑞 +1 位作者 周宇 孙向前 《电信网技术》 2015年第7期47-51,共5页
作为移动网络解决热点覆盖和数据分流的有效途径,Small Cell Enhancement的网络部署主要考虑了4种预估场景,但网络接口间的非理想回传环境将导致实际应用中多方面的问题,而双连接和移动性锚点将从多个技术层面很好地解决这些问题,并能... 作为移动网络解决热点覆盖和数据分流的有效途径,Small Cell Enhancement的网络部署主要考虑了4种预估场景,但网络接口间的非理想回传环境将导致实际应用中多方面的问题,而双连接和移动性锚点将从多个技术层面很好地解决这些问题,并能指明若干未来发展和改进方向。 展开更多
关键词 small cell Enhancement应用场景 双连接移动性锚点
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面向未来超密集Small Cell网络的系统级仿真实现 被引量:4
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作者 李伟 李辉宇 李冰琪 《电视技术》 北大核心 2015年第22期38-43,共6页
在充分理解无线通信系统级仿真以及超密集Small Cell技术的基础上,利用Visual Studio 2010实现了Small Cell的三维双带模型,搭建了面向未来超密集Small Cell网络的系统级仿真平台。仿真验证了平台中的Small Cell双带模型拓扑结构,重点... 在充分理解无线通信系统级仿真以及超密集Small Cell技术的基础上,利用Visual Studio 2010实现了Small Cell的三维双带模型,搭建了面向未来超密集Small Cell网络的系统级仿真平台。仿真验证了平台中的Small Cell双带模型拓扑结构,重点分析了3GPP提出的3种功率控制方案对超密集Small Cell网络性能的影响。仿真结果表明,功率控制方案的仿真性能与理论分析相吻合,证实该平台达到了系统设计的相关要求。该仿真平台为分析超密集Small Cell网络的性能提供了技术手段,评估结果对Small Cell前期部署及后期优化具有指导意义。 展开更多
关键词 small cell 超密集网络 系统级仿真 干扰管理 功率控制 3GPP
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