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    • 3. 发明申请
    • DOWNLINK SCHEDULING IN FRACTIONAL FREQUENCY REUSE (FFR) SYSTEMS
    • 在频率重复(FFR)系统中的下行调度
    • US20110312360A1
    • 2011-12-22
    • US12819191
    • 2010-06-19
    • Ritesh Kumar MadanSiddharth RayNiranjan N. RatnakarArnab Das
    • Ritesh Kumar MadanSiddharth RayNiranjan N. RatnakarArnab Das
    • H04B7/00
    • H04L5/02H04L5/0058H04L5/0078
    • An apparatus and method are disclosed for determining the optimal bandwidth fractions for all the users in each frequency band in a wireless communication system to maximize the net sum of user utilities. User utilities are functions of average rates of users, where different averaging rules can be used for different users. The standard approach of computing an optimal scheduler strategy involves the solution of a convex optimization problem that has a complexity on the order of O(N3) for N flows. This approach is not feasible for online implementation having a large number of flows. The method of the present work employs an efficient computational algorithm that obtains the optimal bandwidth fractions in O(N) time. This feature makes the method suitable for implementation in wideband cellular systems like LTE (Long Term Evolution) and UMB (Ultra Mobile Broadband).
    • 公开了一种用于确定无线通信系统中每个频带中所有用户的最佳带宽分数的装置和方法,以最大化用户实用程序的净和。 用户实用程序是用户的平均速率的函数,其中不同的平均规则可以用于不同的用户。 计算最优调度器策略的标准方法涉及对于N个流具有O(N3)级的复杂度的凸优化问题的解。 这种方法对于具有大量流量的在线实现是不可行的。 本工作的方法采用了一种在O(N)时间内获得最佳带宽分数的有效计算算法。 该特征使得该方法适用于诸如LTE(长期演进)和UMB(超移动宽带)的宽带蜂窝系统中的实现。
    • 5. 发明授权
    • Fiber aided wireless network architecture
    • 光纤辅助无线网络架构
    • US07684709B2
    • 2010-03-23
    • US11540975
    • 2006-09-29
    • Siddharth RayMuriel MedardLizhong Zheng
    • Siddharth RayMuriel MedardLizhong Zheng
    • H04B10/00
    • H04B10/25754
    • A FAWNA that allows high-speed mobile connectivity by leveraging the speed of optical networks. Specifically, SIMO FAWNA, which comprises a SIMO wireless channel interfaced with a fiber channel through wireless-to-optical interfaces. Received wireless signal at each interface are sampled and quantized prior to transmission. The capacity of the FAWNA approaches the capacity of the architecture exponentially with fiber capacity. It is also shown that for a given fiber capacity, there is an optimal method of operating wireless bandwidth and number of interfaces. An optimal method to divide the fiber capacity among the interfaces is shown, which ensures that each interface is allocated a rate so that noise is dominated by front end noise rather than by quantization distortion. A method is also presented in which, rather than dynamically changing rate allocation based on channel state, a less complex, fixed rate allocation may be adopted with very small loss in performance.
    • FAWNA通过利用光网络的速度来实现高速移动连接。 具体来说,SIMO FAWNA包括通过无线到光学接口与光纤通道接口的SIMO无线信道。 在每个接口处的接收到的无线信号在传输之前被采样和量化。 FAWNA的容量以光纤容量指数地接近架构容量。 还表明,对于给定的光纤容量,存在操作无线带宽和接口数量的最佳方法。 示出了在接口之间划分光纤容量的最佳方法,其确保每个接口被分配速率,使得噪声以前端噪声为主,而不是通过量化失真。 还提出了一种方法,其中,不是基于信道状态动态地改变速率分配,而是可以采用较不复杂的固定速率分配,而性能损失非常小。
    • 6. 发明申请
    • SCHEDULING QOS FLOWS IN BROADBAND WIRELESS COMMUNICATION SYSTEMS
    • 在宽带无线通信系统中调度QOS流
    • US20090122717A1
    • 2009-05-14
    • US12264051
    • 2008-11-03
    • Arnab DasRitesh MadanSundeep RanganSanjay ShakkottaiSiddharth Ray
    • Arnab DasRitesh MadanSundeep RanganSanjay ShakkottaiSiddharth Ray
    • H04L12/26
    • H04L47/10H04L47/14H04L47/2441H04L47/283H04L47/30H04L47/70H04L47/762H04L47/803H04L47/824H04W72/12H04W72/1205H04W72/1231
    • Systems and methodologies are described that facilitate enhanced resource scheduling for a wireless communication system. As described herein, packets associated with a common flow that arrive within a predetermined time period following a leading packet associated with the flow can be grouped into respective packet bursts. Subsequently, system bandwidth, transmit power, and/or other communication resources can be scheduled based on an analysis of the respective packet bursts. As provided herein, by analyzing respective packet bursts in lieu of individual packets, computational and resource overhead required for resource scheduling can be significantly reduced. In one example described herein, a resource schedule is determined by selecting one or more flows to be assigned bandwidth from among a plurality of flows based on an analysis of packet bursts respectively associated with the flows. Sufficient bandwidth can subsequently be scheduled for the selected flows for transmission of the respectively associated packet bursts.
    • 描述了促进无线通信系统的增强的资源调度的系统和方法。 如本文所述,与在与流相关联的前导分组之后的预定时间段内到达的公共流相关联的分组可以被分组为相应的分组突发。 随后,可以基于相应分组突发的分析来调度系统带宽,发射功率和/或其他通信资源。 如本文提供的,通过分析各个分组突发来代替各个分组,可以显着地减少资源调度所需的计算和资源开销。 在本文描述的一个示例中,基于与流分别相关联的分组突发的分析,通过从多个流中选择要分配带宽的一个或多个流来确定资源调度。 随后可以为所选择的流调度足够的带宽以传输分别相关联的分组突发。
    • 8. 发明申请
    • LOAD DISTRIBUTION IN A NETWORK OF SMALL-CELL BASE STATIONS
    • 小型基站网络中的负载分配
    • US20140064083A1
    • 2014-03-06
    • US13604748
    • 2012-09-06
    • Siddharth RayMurari SrinivasanMilo Steven Medin
    • Siddharth RayMurari SrinivasanMilo Steven Medin
    • H04W28/08H04W36/22
    • H04W28/08H04W16/08H04W24/08H04W28/0247H04W36/22H04W84/045H04W92/045
    • A network device may make a determination that a first backhaul connection, which serves a first base station, is congested and that a second backhaul connection, which serves a second base station, is not congested. This determination may be made based on a first periodic data cap imposed (on the first backhaul connection, a traffic load on the first backhaul connection, a second periodic data cap imposed on the second backhaul connection, and a traffic load on the second backhaul connection. In response to the determination, the network device may configure a value of a cellular communication parameter utilized by one or both of the base stations. The configuration may comprise periodic adjustments of the value of the cellular communication parameter. The periodic adjustments may cause one or more mobile devices to be cyclically handed-over between the first base station and the second base station.
    • 网络设备可以确定服务于第一基站的第一回程连接被拥塞,并且用于第二基站的第二回程连接不拥塞。 该确定可以基于施加的第一周期性数据上限(在第一回程连接,第一回程连接上的业务负载,施加在第二回程连接上的第二周期性数据上限以及第二回程连接上的业务负载) 响应于该确定,网络设备可以配置由一个或两个基站使用的蜂窝通信参数的值,该配置可以包括对蜂窝通信参数的值的周期性调整,周期性调整可以导致一个 或更多的移动设备在第一基站和第二基站之间循环切换。