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    High performance scheduling methods and apparatus for leveraging diversity in relay-enabled wireless networks
    21.
    发明授权
    High performance scheduling methods and apparatus for leveraging diversity in relay-enabled wireless networks 有权
    高性能调度方法和装置，用于在继电器使能的无线网络中利用分集

    公开(公告)号：US08170031B2

    公开(公告)日：2012-05-01

    申请号：US12277086

    申请日：2008-11-24

    Applicant: Karthikeyan Sundaresan

    Inventor： Karthikeyan Sundaresan

    IPC: H04L12/28 ,  H04W4/00

    CPC classification number: H04W72/1257 ,  H04B7/2606 ,  H04L5/0023 ,  H04L5/0053 ,  H04L5/0058 ,  H04W84/047

    Abstract: Apparatus and methods are described for scheduling transmission resources in a relay-enabled orthogonal frequency-division multiple access (OFDMA) wireless communications system. Schedulers are described which address the problem of determining the optimal transmission schedule across two hops in the presence of finite user buffers with methods that provide approximate solutions with worst-case performance guarantees and average-case performance that is close to the optimal. The solutions formulate the diversity scheduling problem as an integer program. The weights used in the formulation incorporate the various diversity gains. The integer program is relaxed to a linear program and solved. The resulting fractional solutions are then rounded to integral values. In the process, if buffer or channel feasibility is violated, such violations are addressed through appropriate mechanisms that provide performance guarantees. The relay hop fractional variables are rounded to integral values first. Then the access hop flow is updated based on the rounded relay hop flow. Finally, the access hop variables are rounded to integral values to provide the resulting flow schedule.

    Abstract translation: 描述了用于在中继使能的正交频分多址（OFDMA）无线通信系统中调度传输资源的装置和方法。 描述了调度器，其解决了在存在有限用户缓冲器的情况下在两个跳上确定最佳传输调度的问题，其中提供具有最差情况性能保证的近似解决方案和接近最优的平均情况性能的方法。 该解决方案作为一个整数程序来形成分集调度问题。 配方中使用的权重包含各种多样性收益。 整数程序放宽到线性程序并解决。 然后将所得到的分数解被舍入到整数值。 在此过程中，如果违反缓冲区或渠道可行性，则通过提供性能保证的适当机制来解决此类违规行为。 中继跳分数变量首先舍入为积分值。 然后根据舍入的中继跳数来更新接入跳数。 最后，访问跳变量被四舍五入为整数值，以提供最终的流程。

    Integrated scheduling of unicast and multicast traffic in relay-enabled wireless networks
    22.
    发明授权
    Integrated scheduling of unicast and multicast traffic in relay-enabled wireless networks 有权
    支持中继的无线网络中单播和组播流量的综合调度

    公开(公告)号：US08098609B2

    公开(公告)日：2012-01-17

    申请号：US12368287

    申请日：2009-02-09

    Applicant: Karthikeyan Sundaresan ,  Sampath Rangarajan

    Inventor： Karthikeyan Sundaresan ,  Sampath Rangarajan

    IPC: H04H20/71

    CPC classification number: H04W72/1257 ,  H04B7/026 ,  H04B7/0689 ,  H04B7/2606 ,  H04L5/0007 ,  H04W84/047

    Abstract: A wireless network with integrated scheduling of unicast and multicast users in a relay-enabled two-hop wireless network is disclosed. In this system, users with finite buffers are considered and scheduled over multiple channels in an OFDMA-based wireless network. The gain-specific and efficient scheduling system helps leverage diversity and spatial reuse gains from these networks. The system is applicable to both unicast and multicast traffic and leverages diversity and spatial reuse gains simultaneously to optimize the target network with both unicast and multicast flows. The integrated scheduling system strikes a good balance in delivering efficient performance to unicast and multicast flows.

    Abstract translation: 公开了一种在具有中继功能的双跳无线网络中的单播和组播用户的集成调度的无线网络。 在该系统中，在基于OFDMA的无线网络中，通过多个信道考虑并调度有限缓冲区的用户。 增益特定且高效的调度系统有助于利用这些网络的多样性和空间重用增益。 该系统适用于单播和组播流量，同时利用分集和空间重用增益来优化单播和组播流的目标网络。 综合调度系统在向单播和组播流提供高效性能方面取得了很好的平衡。

    Controlled Dissemination of Information in Mobile Networks
    23.
    发明申请
    Controlled Dissemination of Information in Mobile Networks 审中-公开
    控制传播移动网络信息

    公开(公告)号：US20090310783A1

    公开(公告)日：2009-12-17

    申请号：US12371976

    申请日：2009-02-17

    Applicant: Ravindranath Kokku ,  Karthikeyan Sundaresan ,  Guofei Jiang

    Inventor： Ravindranath Kokku ,  Karthikeyan Sundaresan ,  Guofei Jiang

    IPC: H04K1/00 ,  H04L9/28

    CPC classification number: H04L9/083 ,  G06Q20/3672 ,  G06Q20/3829 ,  H04L2209/601 ,  H04L2209/80

    Abstract: The present invention discloses systems and methods for controlled dissemination of information in mobile networks using encrypted broadcasts that are decrypted at the device. An encryption key is generated corresponding to a particular category or granularity of information. The information is encrypted before it is broadcast to the sector. A user within the sector sends a key request across the network, in response to which the encryption key is sent to the user. The user can decrypt the encrypted information received in the broadcast. Additionally, a credit-checking mechanism may be employed to ensure that the user has sufficient credit to purchase the key. In one embodiment, the information to be disseminated is divided into a plurality of categories, wherein each category corresponds to a granularity of information. The encryption key is one in a set of encryption keys, each of said set of encryption keys being assigned to a particular hierarchical level corresponding to a particular granularity of information.

    Abstract translation: 本发明公开了使用在设备处被解密的加密广播来在移动网络中控制信息传播的系统和方法。 生成对应于特定类别或信息粒度的加密密钥。 信息在广播到该扇区之前被加密。 扇区内的用户通过网络发送密钥请求，响应于该密钥请求向用户发送加密密钥。 用户可以对广播中接收的加密信息进行解密。 此外，可以采用信用检查机制来确保用户具有足够的信用来购买密钥。 在一个实施例中，要传播的信息被分成多个类别，其中每个类别对应于信息的粒度。 加密密钥是一组加密密钥中的一个，所述一组加密密钥中的每一个被分配给与特定信息粒度相对应的特定层级。

    Femtocell resource management for interference mitigation
    24.
    发明授权
    Femtocell resource management for interference mitigation 有权
    用于干扰减轻的毫微微小区资源管理

    公开(公告)号：US08767580B2

    公开(公告)日：2014-07-01

    申请号：US13408487

    申请日：2012-02-29

    Applicant: Karthikeyan Sundaresan ,  Mustafa Arslan ,  Jongwon Yoon

    Inventor： Karthikeyan Sundaresan ,  Mustafa Arslan ,  Jongwon Yoon

    IPC: H04J1/08 ,  G08C15/00 ,  H04W4/00 ,  H04W40/00 ,  H04W72/00 ,  H04B7/00 ,  H04W72/06 ,  H04W28/04 ,  H04W28/06 ,  H04W84/04 ,  H04W24/10

    CPC classification number: H04W72/06 ,  H04W24/10 ,  H04W28/04 ,  H04W28/06 ,  H04W72/00 ,  H04W74/085 ,  H04W84/045

    Abstract: Methods and systems for managing resources in femtocells are disclosed. One method includes transmitting at least one frame including a first zone of resources on which a set of base stations including at least one femtocell base station and base stations that are adjacent to the femtocell base station implement transmission of signals to impose interference. The one or more frames further includes a second zone dedicated for measuring throughput of mobile stations served by the femtocell base station without interference. The mobile stations are categorized by determining throughputs of the mobile stations with interference based on the transmission of signals on the first zone. Resources of at least one additional frame are configured based on the categorization. Further, the additional frame(s) are transmitted in a cell of the femtocell base station in accordance with the configuration.

    Abstract translation: 公开了用于管理毫微微小区资源的方法和系统。 一种方法包括发送包括第一资源区域的至少一个帧，其中包括至少一个毫微微小区基站的一组基站和与毫微微小区基站相邻的基站实现信号的发送以施加干扰。 该一个或多个帧还包括专用于测量由毫微微小区基站服务的移动站的吞吐量而不受干扰的第二区域。 通过基于第一区域上的信号的传输来确定具有干扰的移动站的吞吐量来对移动站进行分类。 基于分类配置至少一个附加帧的资源。 此外，根据该配置，在毫微微小区基站的小区中发送附加帧。

    Methods and systems for allocation of macro cell resources in a distributed femto cell network and a distributed relay station network
    26.
    发明授权
    Methods and systems for allocation of macro cell resources in a distributed femto cell network and a distributed relay station network 有权
    在分布式毫微微小区网络和分布式中继站网络中分配宏小区资源的方法和系统

    公开(公告)号：US08311005B2

    公开(公告)日：2012-11-13

    申请号：US12567163

    申请日：2009-09-25

    Applicant: Karthikeyan Sundaresan ,  Sampath Rangarajan

    Inventor： Karthikeyan Sundaresan ,  Sampath Rangarajan

    IPC: H04W4/00

    CPC classification number: H04W72/04 ,  H04L5/0023 ,  H04W72/042 ,  H04W72/0486 ,  H04W84/045

    Abstract: Methods and systems for reusing macro cell resources in femto cell base stations or relay stations in a non-collaborative manner are disclosed. In addition, orthogonal resource allocation between a macro cell base station and femto cell base stations/relay stations may be dynamically adjusted by considering user-population variance. Moreover, an additional level of spatial reuse by femto cell base stations or relay stations can be provided by employing macro cell user location information.

    Abstract translation: 公开了以非协作方式在毫微微小区基站或中继站中重用宏小区资源的方法和系统。 此外，可以通过考虑用户群体方差来动态地调整宏小区基站和毫微微小区基站/中继站之间的正交资源分配。 此外，可以通过使用宏小区用户位置信息来提供毫微微小区基站或中继站的附加级别的空间重用。

    SYSTEMS AND METHODS FOR LEVERAGING SPATIAL REUSE IN OFDMA RELAY NETWORKS
    30.
    发明申请
    SYSTEMS AND METHODS FOR LEVERAGING SPATIAL REUSE IN OFDMA RELAY NETWORKS 有权
    在OFDMA继电器网络中利用空间重用的系统和方法

    公开(公告)号：US20100046414A1

    公开(公告)日：2010-02-25

    申请号：US12388398

    申请日：2009-02-18

    Applicant: Karthikeyan Sundaresan

    Inventor： Karthikeyan Sundaresan

    IPC: H04B7/14 ,  H04W72/04

    CPC classification number: H04W72/1231 ,  H04B7/2606 ,  H04L5/0037 ,  H04W72/04 ,  H04W84/047 ,  H04W88/04

    Abstract: Systems and methods for scheduling transmission that leverages both diversity and spatial reuse gains in the presence of finite user buffers in a two-hop wireless relay setting are disclosed. The system includes partitioning a set of relays to enable spatial reuse while accounting for half-duplex nature of relays, and assigning and reusing of channels to the relays (and associated users) in the two partitions to maximize the aggregate system throughput while ensuring proportional fairness.

    Abstract translation: 公开了用于在两跳无线中继设置中存在有限用户缓冲器的情况下利用分集和空间重用增益的调度传输的系统和方法。 该系统包括划分一组中继以实现空间重用，同时考虑中继的半双工性质，以及分配和重用两个分区中的中继（和关联用户）的信道，以最大限度地提高总体系统吞吐量同时确保比例公平性 。

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