Abstract:
Optical superchannel methods and systems that couple two or more local oscillators into a single coherent receiver front end to receive multiple optical subcarriers are shown and described. With multiple local oscillators coupled into a single coherent receiver and appropriate optical selective filtering of the superchannel signal, non-neighboring subcarriers may be received by the single coherent optical receiver.
Abstract:
A method by an optical network unit ONU includes, for downstream transmission, using a first tunable laser for coherent detection on a sub-band basis to increase receiver sensitivity and reduce analog-to-digital conversion ADC and digital signal processor DSP requirements within the ONU, and for upstream transmission, using a second tunable laser and using an optical signal beating between the first and second tunable lasers to generate a tunable radio frequency RF signal source for upstream multi-band OFDMA signal generation thereby avoiding need for an otherwise more costly RF clock source within the ONU, enabling low-speed digital-to-analog conversion DAC operation and rendering the ONU colorless in both optical and radio frequency RF domains.
Abstract:
A method implemented in a user equipment used in a multi-user multiple input multiple output (MU-MIMO) wireless communications system is disclosed. The method includes receiving from a base station an indication of a first modulation type for the user equipment, receiving a first data signal for the user equipment, receiving a second data signal for a co-scheduled user equipment, where a second modulation type for the co-scheduled user equipment is unknown to the user equipment, and deciding the second modulation type. Other methods, systems, and apparatuses also are disclosed.
Abstract:
Systems and methods are disclosed for scheduling one or more queries for execution with one or more cloud computers by applying a service level agreement (SLA) analysis using an SLA-tree data structure to each query in a query queue; using the SLA-tree data structure to determine an overall profit in the query queue; and generating a profit-oriented schedule to select the next query for execution by the cloud computers.
Abstract:
A method includes performing quantum state tomography from the statistics of a collection of measurements, each of which has only two possible outcomes and has the feature of being a measurement of a single qubit. By carefully choosing the measurements it becomes possible to infer the state of a quantum system from the statistics. Moreover, the function which computes the state from the measurement statistics can be computed efficiently in the dimension of the underlying system. Reconstructing the quantum state is performed in accordance with the following expression: ρ = ( 2 d ∑ i = 1 d 2 - 1 p i P i + ( 1 - p i ) ( 1 - P i ) ) - ( d 2 - 2 d ) I d , where d is the dimension of the quantum mechanical system, ρ is the state of the quantum mechanical system, Id denotes the identity operator, Pi is one of the plurality of measurement projectors, and pi is the probability for the measurement projector Pi.
Abstract translation:一种方法包括从测量集合的统计量中进行量子态断层摄影,每个测量集合仅具有两个可能的结果,并且具有作为单个量子位的测量的特征。 通过仔细选择测量,可以从统计学中推断量子系统的状态。 此外,可以在基础系统的维度中有效地计算从测量统计量计算状态的函数。 根据以下表达式进行重构量子态:&rgr; =(2 dΣ i = 1 d 2 - 1(t)]]>其中,d是维度(1-p i) 的量子力学系统 是量子力学系统的状态,Id表示识别算子,Pi是多个测量投影仪之一,pi是测量投影仪Pi的概率。
Abstract:
A computer implemented method employing experience transfer to improve the efficiencies of an exemplary configuration tuning in computing systems. The method employs a Bayesian network guided tuning algorithm to discover the optimal configuration setting. After the tuning has been completed, a Bayesian network is obtained that records the parameter dependencies in the original system. Such parameter dependency knowledge has been successfully embedded to accelerate the configuration searches in other systems. Experimental results have demonstrated that with the help of transferred experiences we can achieve significant time savings for the configuration tuning task.
Abstract:
For each path in a first plurality of paths in said communication network, a respective first weighted path length is determined based at least in part on a number of pure wireless links in the path. From among the first plurality of paths, a second plurality of paths having first weighted path lengths less than a threshold value is selected. For each path in the second plurality, a respective second weighted path length is determined based at least in part on a number of pure optical links in the path, and from among the second plurality of paths, a transmission path is selected having a highest second weighted path length. Information is transmitted via the transmission path.
Abstract:
Systems and methods are disclosed to partition a multicast group into a plurality of partitions where each partition has a mutually exclusive subset of users or clients; scheduling beam transmission with switched beamforming antennas; and performing the multicast transmission in accordance with the beam scheduling.
Abstract:
A user equipment (UE) used in a multi-user (MU)-multiple input multiple output (MIMO) orthogonal frequency division multiple access (OFDMA) system is disclosed. The UE includes a receiving unit to receive from a base station an indication of an estimate of or an upper-bound on the total number of MU-MIMO user equipments (|S|) that are scheduled on a sub-band by the base station, wherein the sub-band includes one or more resource units, a calculation unit to calculate channel quality based on the indication of the estimate of or the upper-bound on the total number of MU-MIMO user equipments, and a transmission unit to transmit to the base station an indication of the channel quality. Other methods and apparatuses also are disclosed.
Abstract translation:公开了在多用户(MU) - 多输入多输出(MIMO)正交频分多址(OFDMA)系统中使用的用户设备(UE)。 UE包括:接收单元,用于从基站接收由基站在子带上调度的MU-MIMO用户设备(| S |)的总数的估计或上限的指示; 其特征在于,所述子带包括一个以上的资源单元,基于MU-MIMO用户设备的总数的估计或上限的指示来计算信道质量的计算单元,以及发送单元 向基站提供信道质量的指示。 还公开了其它方法和装置。
Abstract:
Systems and methods are disclosed for a swap-based multitenant database load balancing (SWAT) by finding an optimal swap set that eliminates hotspots, and finding a sequencing and parallelization of swap executions for the multi-tenant database.