The rapid growth of IP traffic has contributed to wide deployment of optical devices in elastic optical network.However,the passband shape of wavelength selective switches(WSSs)that are used in reconfigurable optical ...The rapid growth of IP traffic has contributed to wide deployment of optical devices in elastic optical network.However,the passband shape of wavelength selective switches(WSSs)that are used in reconfigurable optical add-drop multiplexer(ROADM)/optical cross connect(OXC)is not ideal,causing the narrowing of spectrum.Spectral narrowing will lead to signal impairment.Therefore,guard-bands need to be inserted between adjacent paths which will cause the waste of resources.In this paper,we propose a service-based intelligent aggregation node selection and area division(ANS-AD)algorithm.For the rationality of the aggregation node selection,the ANS-AD algorithm chooses the aggregation nodes according to historical traffic information based on big data analysis.Then the ANS-AD algorithm divides the topology into areas according to the result of the aggregation node selection.Based on the ANS-AD algorithm,we propose a time-domain and spectral-domain flow aggregation(TS-FA)algorithm.For the purpose of reducing resources'waste,the TS-FA algorithm attempts to reduce the insertion of guard-bands by time-domain and spectral-domain flow aggregation.Moreover,we design a time-domain and spectral-domain flow aggregation module on software defined optical network(SDON)architecture.Finally,a simulation is designed to evaluate the performance of the proposed algorithms and the results show that our proposed algorithms can effectively reduce the resource waste.展开更多
提出了一种采用逻辑接口的基于TPMIPv6(transient binding for proxy mobile IPv6)的域间切换管理方案.逻辑接口从2个物理接口抽象出来,上层需知道这个逻辑接口;2个物理接口对上层透明,在切换时分别与2个MAG(mo-bile access gateway)相...提出了一种采用逻辑接口的基于TPMIPv6(transient binding for proxy mobile IPv6)的域间切换管理方案.逻辑接口从2个物理接口抽象出来,上层需知道这个逻辑接口;2个物理接口对上层透明,在切换时分别与2个MAG(mo-bile access gateway)相连;后一接口在进行预注册时,前一接口仍保持原来的通信.流移动管理由LMA(local mobileanchor)控制,以避免切换过程中物理接口的中断.分析结果表明,与已有的域间切换方案相比,建议方案的切换时延更小.展开更多
基金funded by ZTE Industry-Academia-Research Cooperation Funds under Grant No.2017110031005226
文摘The rapid growth of IP traffic has contributed to wide deployment of optical devices in elastic optical network.However,the passband shape of wavelength selective switches(WSSs)that are used in reconfigurable optical add-drop multiplexer(ROADM)/optical cross connect(OXC)is not ideal,causing the narrowing of spectrum.Spectral narrowing will lead to signal impairment.Therefore,guard-bands need to be inserted between adjacent paths which will cause the waste of resources.In this paper,we propose a service-based intelligent aggregation node selection and area division(ANS-AD)algorithm.For the rationality of the aggregation node selection,the ANS-AD algorithm chooses the aggregation nodes according to historical traffic information based on big data analysis.Then the ANS-AD algorithm divides the topology into areas according to the result of the aggregation node selection.Based on the ANS-AD algorithm,we propose a time-domain and spectral-domain flow aggregation(TS-FA)algorithm.For the purpose of reducing resources'waste,the TS-FA algorithm attempts to reduce the insertion of guard-bands by time-domain and spectral-domain flow aggregation.Moreover,we design a time-domain and spectral-domain flow aggregation module on software defined optical network(SDON)architecture.Finally,a simulation is designed to evaluate the performance of the proposed algorithms and the results show that our proposed algorithms can effectively reduce the resource waste.
文摘基于IP核的技术设计了一种快速数字电平转换电路.采用电压-电流-电压的方式实现不同电压域的电平转换,引入单稳态延时电路和快慢速通道提高电平转换速度和降低静态功耗,并给出了与标准CMOS工艺兼容的扩展漏极高压MOS管的优化设计.仿真结果表明:在将-5^+5 V电压域的数字电平转换成0^+12V的电压域时,其延时可低于10 ns.
文摘提出了一种采用逻辑接口的基于TPMIPv6(transient binding for proxy mobile IPv6)的域间切换管理方案.逻辑接口从2个物理接口抽象出来,上层需知道这个逻辑接口;2个物理接口对上层透明,在切换时分别与2个MAG(mo-bile access gateway)相连;后一接口在进行预注册时,前一接口仍保持原来的通信.流移动管理由LMA(local mobileanchor)控制,以避免切换过程中物理接口的中断.分析结果表明,与已有的域间切换方案相比,建议方案的切换时延更小.
