考虑光学开放接入网(optical open access network)中的公平性,将最大-最小公平算法用到双向服务等级协议(D-SLA)中,提出了一种基于以太无源光学网络(EPON)的易于实现的双向服务等级协议公平带宽分配算法。算法使用了两轮分配,通过分级...考虑光学开放接入网(optical open access network)中的公平性,将最大-最小公平算法用到双向服务等级协议(D-SLA)中,提出了一种基于以太无源光学网络(EPON)的易于实现的双向服务等级协议公平带宽分配算法。算法使用了两轮分配,通过分级管理确定首要SLA和次要SLA,对业务提供商和用户进行分级区别对待,实现同时满足双方的公平性需求。仿真结果表明,本文算法能够实现对运营商和用户的双向公平,通过公平性指数评估公平性,本文算法的公平性优于其它算法,具有合理性和实用性。展开更多
A low cost of die area and power consumption CMOS image sensor readout circuit with fixed pattern noise(FPN) cancellation is proposed.By using only one coupling capacitor and switch in the double FPN cancelling correl...A low cost of die area and power consumption CMOS image sensor readout circuit with fixed pattern noise(FPN) cancellation is proposed.By using only one coupling capacitor and switch in the double FPN cancelling correlative double sampling(CDS),pixel FPN is cancelled and column FPN is stored and eliminated by the sampleand-hold operation of digitally programmable gain amplifier(DPGA).The bandwidth balance technology based on operational amplifier(op-amp) sharing is also introduced to decrease the power dissi...展开更多
文摘考虑光学开放接入网(optical open access network)中的公平性,将最大-最小公平算法用到双向服务等级协议(D-SLA)中,提出了一种基于以太无源光学网络(EPON)的易于实现的双向服务等级协议公平带宽分配算法。算法使用了两轮分配,通过分级管理确定首要SLA和次要SLA,对业务提供商和用户进行分级区别对待,实现同时满足双方的公平性需求。仿真结果表明,本文算法能够实现对运营商和用户的双向公平,通过公平性指数评估公平性,本文算法的公平性优于其它算法,具有合理性和实用性。
基金Supported by National Natural Science Foundation of China (No.60806010,No.60976030)Tianjin Innovation Special Funds for Science and Technology (No.05FZZDGX00200)
文摘A low cost of die area and power consumption CMOS image sensor readout circuit with fixed pattern noise(FPN) cancellation is proposed.By using only one coupling capacitor and switch in the double FPN cancelling correlative double sampling(CDS),pixel FPN is cancelled and column FPN is stored and eliminated by the sampleand-hold operation of digitally programmable gain amplifier(DPGA).The bandwidth balance technology based on operational amplifier(op-amp) sharing is also introduced to decrease the power dissi...