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    • 2. 发明授权
    • Method and apparatus for power control in wireless networks
    • 无线网络中功率控制的方法和装置
    • US5956649A
    • 1999-09-21
    • US182906
    • 1998-10-29
    • Debasis MitraJohn A. Morrison
    • Debasis MitraJohn A. Morrison
    • H04B1/04H04B7/005H04B7/26H04W52/00H04W52/24H04W52/34H04B17/00
    • H04W52/343H04W52/24H04W52/265H04W52/346
    • A method and apparatus use a set of parameters characterizing an interference signal at a base unit for determining power levels for signals transmitted from a communications device to the base unit. The set of parameters comprises second or higher order statistics characterizing the interference signal, and the parameters are used to determine a desired power level for signals received at the base unit. The desired power level is communicated to a communications device via a pilot signal transmitted by the base unit at a predetermined level. The predetermined level and the power of the received pilot signal are used to compute a path gain between the base unit and communications device. The path gain and desired power level are then used to determine the power level of signals transmitted from the communications device to the base unit.
    • 方法和装置使用表征基站单元处的干扰信号的一组参数来确定从通信设备发送到基站单元的信号的功率电平。 这组参数包括表征干扰信号的第二或更高阶统计量,并且参数用于确定在基本单元处接收的信号的期望功率电平。 所需的功率电平经由基本单元以预定电平发送的导频信号传送到通信设备。 接收到的导频信号的预定电平和功率用于计算基本单元和通信设备之间的路径增益。 路径增益和期望功率电平然后用于确定从通信设备发送到基站的信号的功率电平。
    • 3. 发明授权
    • Method for power control in wireless networks for communicating multiple
information classes
    • 用于无线网络中用于传达多个信息类的功率控制的方法
    • US5732328A
    • 1998-03-24
    • US812627
    • 1997-03-07
    • Debasis MitraJohn A. Morrison
    • Debasis MitraJohn A. Morrison
    • H04B1/04H04B7/005H04B7/26H04W52/00H04W52/24H04W52/34H04B1/00H04B7/00
    • H04B7/2628H04W52/04H04W52/24H04W52/343H04W52/346
    • Transmission power of a wireless terminal for transmitting a signal representing information of a particular information class to a base station capable of receiving signals for a plurality of information classes is determined based on a probability measure indicating received signal outage durations that would likely occur over a time interval. Moreover, the transmission power is determined to achieve probable signal outage durations according to the measure that are tolerable for the particular information class to be transmitted. The probability measure is further based on an enhanced characterization of a variation and mean of the detected signal interference magnitude over a time interval. Respective differences in the tolerable signal outage intervals for different information classes, such as voice, audio or video or data, and the corresponding enhanced interference characterization enable transmission of signals representing the information classes at desirably respective low power levels while still providing an acceptable quality of service relative to conventional power control techniques. Such low transmission powers tend to contribute less interference to the communication system and enable greater communication capacity.
    • 基于表示在一段时间内可能发生的接收信号中断持续时间的概率测量,确定用于将表示特定信息类别的信号的信号发送到能够接收多个信息类别的信号的基站的无线终端的发送功率 间隔。 此外,根据对要发送的特定信息类可容忍的测量,确定发送功率以实现可能的信号中断持续时间。 概率测量还基于对时间间隔内检测到的信号干扰幅度的变化和平均值的增强表征。 用于不同信息类别(例如语音,音频或视频或数据)的可容忍的信号中断间隔的相应差异以及相应的增强的干扰特性使得能够以希望的相应的低功率电平传输表示信息类别的信号,同时仍然提供可接受的质量 服务相对于传统的功率控制技术。 这种低传输功率倾向于对通信系统贡献较少的干扰并且能够实现更大的通信能力。
    • 5. 发明授权
    • Time scale separated network management and network provisioning optimizations
    • 时间分隔网络管理和网络配置优化
    • US08953938B2
    • 2015-02-10
    • US11679515
    • 2007-02-27
    • Debasis MitraQiong Wang
    • Debasis MitraQiong Wang
    • H04Q11/00H04L12/24
    • H04L41/0806
    • A communication network is configured to implement time scale separated management and provisioning optimizations, for example, in a core optical network coupled to multiple data networks. Network management optimizations are performed at respective points in time separated by intervals of a first time scale, and network provisioning optimizations are performed at respective points in time separated by intervals of a second time scale, with the intervals of the second time scale being on average substantially longer than the intervals of the first time scale. Moreover, at least a given one of the intervals of the second time scale has a length which is determined based on results of performance of one or more of the network management optimizations. The core optical network may be configured utilizing information specified by the network management and network provisioning optimizations.
    • 通信网络被配置为实现例如在耦合到多个数据网络的核心光网络中的时间分隔的管理和供应优化。 网络管理优化在由第一时间尺度的间隔分开的各个时间点执行,并且网络供应优化在由第二时间尺度的间隔分开的各个时间点执行,第二时间间隔的平均值是平均的 比第一时间刻度的间隔长得多。 此外,第二时间刻度的至少一个间隔中的给定的一个具有基于一个或多个网络管理优化的性能的结果确定的长度。 可以利用由网络管理和网络配置优化指定的信息来配置核心光网络。
    • 7. 发明申请
    • Techniques for network traffic engineering
    • 网络流量工程技术
    • US20050008014A1
    • 2005-01-13
    • US10614738
    • 2003-07-07
    • Debasis MitraIraj SanieeAnwar WalidIndra Widjaja
    • Debasis MitraIraj SanieeAnwar WalidIndra Widjaja
    • H04L12/28H04L12/56
    • H04L45/00H04L45/124
    • In a traffic engineering technique, a determination is made as to whether any path of a number of predetermined paths meets requirements corresponding to a request. The predetermined paths are determined by substantially maximizing carried demand using at least traffic demand estimates and network topology information and by performing routing for the substantially maximized carried demand. If a given path meeting the requirements is found, a connection on the given path is created, if possible. The predetermined paths are determined through offline TE techniques referred to herein as offline design-based routing (DBR). The requirements for the path may include a destination address and a bandwidth. The offline DBR techniques can include uncertain static demand information or dynamic connections. The offline DBR techniques may be used with adaptive DBR techniques, such that paths are determined offline if possible but can also use shortest path first (SPF), constrained SPF (CSPF) or other techniques during an online path determination. An improvement to a conventional CSPF technique is also presented.
    • 在交通工程技术中,确定多个预定路径的任何路径是否满足与请求相对应的要求。 通过使用至少业务需求估计和网络拓扑信息并且通过执行基本上最大化的携带需求的路由,基本上最大化承载需求来确定预定路径。 如果找到满足要求的给定路径,则可以创建给定路径上的连接。 通过本文中称为基于离线设计的路由(DBR)的离线TE技术确定预定路径。 路径的要求可以包括目的地址和带宽。 离线DBR技术可以包括不确定的静态需求信息或动态连接。 离线DBR技术可以与自适应DBR技术一起使用,使得如果可能的话,路径被确定离线,但是在线路径确定期间也可以使用最短路径优先(SPF),约束SPF(CSPF)或其他技术。 还提出了对常规CSPF技术的改进。
    • 9. 发明授权
    • Multicommodity flow method for designing traffic distribution on a multiple-service packetized network
    • 用于设计多业务分组网络上的流量分配的多业务流方法
    • US06721270B1
    • 2004-04-13
    • US09370826
    • 1999-08-09
    • Debasis MitraKajamalai Gopalaswamy Ramakrishnan
    • Debasis MitraKajamalai Gopalaswamy Ramakrishnan
    • H04L1228
    • H04L49/25H04L49/205H04L2012/562H04L2012/5621H04L2012/5623H04L2012/5632H04L2012/5638H04L2012/5684H04Q11/0478
    • A method is described for solving traffic engineering problems in a network. In one aspect, the invention is used in a network that has at least one QoS service class and at least one class of service that is not a QoS class. Bandwidth is allocated to service routes in the QoS service class so as to optimize a figure of merit such as network revenue. Then a new allocation is made so as to minimize network usage without departing too far from the optimal value of the figure of merit. A residual network consists of that bandwidth that remains unallocated, on each link of the network. Bandwidth for non-QoS traffic is allocated to routes on the residual network. In a second aspect, the invention involves the use of optimization techniques to allocate bandwidth among service routes in one or more service classes in response to a set of demands in each class. The demands are calculated so as to take into account an effective bandwidth associated with the pertinent class, and so as to make allowance for the stochastic behavior of the traffic demands that occur in practice.
    • 描述了一种解决网络中流量工程问题的方法。 一方面,本发明用于具有至少一个QoS服务类别和不是QoS类别的至少一类服务的网络。 带宽被分配给QoS服务类中的服务路由,以优化诸如网络收入的品质因数。 然后进行新的分配,以便最小化网络使用,而不会偏离品质因数的最佳值。 残留网络由在网络的每个链路上保持未分配的带宽组成。 非QoS流量的带宽被分配给剩余网络上的路由。 在第二方面,本发明涉及使用优化技术来响应于每个类中的一组需求来在一个或多个服务类别中的服务路由之间分配带宽。 计算要求,以考虑与相关班级相关的有效带宽,并对实际发生的交通需求的随机行为进行补贴。