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    Power efficient channel scheduling in a wireless network
    13.
    发明授权
    Power efficient channel scheduling in a wireless network 有权
    在无线网络规划电力有效信道分配

    公开(公告)号：EP1357704B1

    公开(公告)日：2008-07-16

    申请号：EP03007307.6

    申请日：2003-03-31

    Applicant: MICROSOFT CORPORATION

    Inventor： Bahl, Paramvir ,  Adya, Atul ,  Padhye, Jitendra D.

    IPC: H04L12/28 ,  H04L12/56 ,  H04Q7/38

    CPC classification number: H04W52/0216 ,  H04W52/0219 ,  H04W52/0241 ,  H04W52/46 ,  H04W72/14 ,  H04W84/12 ,  H04W88/04 ,  H04W88/06 ,  Y02D70/1226 ,  Y02D70/142

    Abstract: A method and system for optimizing channel access scheduling for multiple wireless computing devices over a wireless network improves channel access efficiency with respect to a primary channel. An access point, or host computer, includes a host transceiver for receiving control information from the wireless computing devices over a low power channel. Upon receiving the control information, the access point applies a scheduling algorithm to schedule channel access for the wireless computing devices to transmit data over the primary communication channel. The wireless computing devices include a low power radio for receiving scheduling information via the low power channel during idle periods. When the scheduling information is received, the wireless computing device activates its primary channel network interface components to communicate data through the primary channel. When the computing device is idle, the device is configured to power down all of its components with the exception of the circuitry required to power the low power channel. As such, the low power channel is maintained in an active state for receiving scheduling information, such as an access schedule, during both idle and non-idle periods.

    Secure recovery in a serverless distributed file system
    15.
    发明公开
    Secure recovery in a serverless distributed file system 有权
    在分布式文件系统的安全恢复，而不服务器

    公开(公告)号：EP1426848A2

    公开(公告)日：2004-06-09

    申请号：EP03026963.3

    申请日：2003-11-25

    Applicant: MICROSOFT CORPORATION

    Inventor： Temudo de Castro, Miguel Oom ,  Adya, Atul ,  Douceur, John R. ,  Bolosky, William J.

    IPC: G06F1/00

    CPC classification number: H04L63/0435 ,  G06F17/30194 ,  G06F21/40 ,  G06F21/62 ,  G06F2221/2101 ,  H04L9/3236 ,  H04L9/3247 ,  H04L9/3255 ,  H04L63/0442 ,  H04L63/0823

    Abstract: Systems and methods for secure file writes after a catastrophic event are allowed over an unauthenticated channel in a serverless distributed file system if an authenticator accompanies the secure file writes. The authenticator can be a power-of-attorney certificate with time limitations, a vector of message authenticated code, or a single message authenticator with secured with a secret shared among members of the serverless distributed file system. The serverless distributed file system includes at least 3 f + 1 participating computer members, with f representing a number of faults tolerable by the system. The group requires at least one authenticator for file creation and file uploads. Any changes to files stored among the members can be made over an unauthenticated channel if the file changes are secured by the authenticator and the group is able to verify the authenticator.

    Power efficient channel scheduling in a wireless network
    16.
    发明公开
    Power efficient channel scheduling in a wireless network 有权
    Leizungseffiziente Kanalzuteilungsplanung在einem drahtlosen Netzwerk

    公开(公告)号：EP1357704A2

    公开(公告)日：2003-10-29

    申请号：EP03007307.6

    申请日：2003-03-31

    Applicant: MICROSOFT CORPORATION

    Inventor： Bahl, Paramvir ,  Adya, Atul ,  Padhye, Jitendra D.

    IPC: H04L12/28 ,  H04L12/56

    CPC classification number: H04W52/0216 ,  H04W52/0219 ,  H04W52/0241 ,  H04W52/46 ,  H04W72/14 ,  H04W84/12 ,  H04W88/04 ,  H04W88/06 ,  Y02D70/1226 ,  Y02D70/142

    Abstract: A method and system for optimizing channel access scheduling for multiple wireless computing devices over a wireless network improves channel access efficiency with respect to a primary channel. An access point, or host computer, includes a host transceiver for receiving control information from the wireless computing devices over a low power channel. Upon receiving the control information, the access point applies a scheduling algorithm to schedule channel access for the wireless computing devices to transmit data over the primary communication channel. The wireless computing devices include a low power radio for receiving scheduling information via the low power channel during idle periods. When the scheduling information is received, the wireless computing device activates its primary channel network interface components to communicate data through the primary channel. When the computing device is idle, the device is configured to power down all of its components with the exception of the circuitry required to power the low power channel. As such, the low power channel is maintained in an active state for receiving scheduling information, such as an access schedule, during both idle and non-idle periods.

    Abstract translation: 用于通过无线网络优化多个无线计算设备的信道接入调度的方法和系统提高了相对于主信道的信道接入效率。 接入点或主机包括主机收发器，用于通过低功率信道从无线计算设备接收控制信息。 在接收到控制信息时，接入点应用调度算法来调度无线计算设备的信道接入以通过主通信信道发送数据。 无线计算设备包括用于在空闲时段期间经由低功率信道接收调度信息的低功率无线电。 当接收到调度信息时，无线计算设备激活其主要信道网络接口组件以通过主要信道传送数据。 当计算设备空闲时，除了为低功率通道供电所需的电路之外，该设备被配置为关闭其所有组件的电源。 因此，在空闲和非空闲时段期间，低功率信道被维持在活动状态以用于接收调度信息，例如访问调度。

    Secure recovery in a serverless distributed file system
    17.
    发明公开
    Secure recovery in a serverless distributed file system 审中-公开
    在einem verteilten中的Sichere Wiederherstellung Dateisystem ohne服务器

    公开(公告)号：EP1526700A3

    公开(公告)日：2014-03-19

    申请号：EP05001147.7

    申请日：2003-11-25

    Applicant: MICROSOFT CORPORATION

    Inventor： Temudo de Castro, Miguel, Oom ,  Adya, Atul ,  Douceur, John, R. ,  Bolosky, William, J.

    IPC: G06F21/40 ,  H04L9/32 ,  G06F21/62 ,  H04L29/06

    CPC classification number: H04L63/0435 ,  G06F17/30194 ,  G06F21/40 ,  G06F21/62 ,  G06F2221/2101 ,  H04L9/3236 ,  H04L9/3247 ,  H04L9/3255 ,  H04L63/0442 ,  H04L63/0823

    Abstract: Systems and methods for secure file writes after a catastrophic event are allowed over an unauthenticated channel in a serverless distributed file system if an authenticator accompanies the secure file writes. The authenticator can be a power-of-attorney certificate with time limitations, a vector of message authenticated code, or a single message authenticator with secured with a secret shared among members of the serverless distributed file system. The serverless distributed file system includes at least 3 f + 1 participating computer members, with f representing a number of faults tolerable by the system. The group requires at least one authenticator for file creation and file uploads. Any changes to files stored among the members can be made over an unauthenticated channel if the file changes are secured by the authenticator and the group is able to verify the authenticator.

    Abstract translation: 如果验证器伴随着安全文件写入，则在无故障分布式文件系统中，通过未经身份验证的通道允许灾难性事件之后的安全文件写入的系统和方法。 验证器可以是具有时间限制的授权证书，消息认证代码的向量，或者具有在无服务器分布式文件系统的成员之间共享的秘密的单个消息认证器。 无服务器分布式文件系统至少包括3f + 1个参与的计算机成员，其中f表示系统可容忍的多个故障。 该组至少需要一个身份验证器用于文件创建和文件上传。 如果文件更改由验证者保护，并且该组能够验证验证者，则可以通过未经身份验证的通道对存储在成员中的文件进行任何更改。

    Collaboratively locating disconnected clients and rogue access points in a wireless network
    20.
    发明公开
    Collaboratively locating disconnected clients and rogue access points in a wireless network 有权
    无党派合作的客户和未经授权的Zuganspunkten定位在无线网络

    公开(公告)号：EP1641183A3

    公开(公告)日：2010-11-10

    申请号：EP05108255.0

    申请日：2005-09-08

    Applicant: Microsoft Corporation

    Inventor： Adya, Atul ,  Qiu, Lili ,  Bahl, Paramvir ,  Chandra, Ranveer

    IPC: H04L12/28

    CPC classification number: H04W12/12 ,  H04W24/08 ,  H04W64/00

    Abstract: Methods are described for using collaboration of neighboring wireless devices to enable location of disconnected wireless devices and rogue wireless access points. A central server computes the locations of the neighboring clients and uses those locations to estimate the location of a disconnected client. These techniques may take advantage of the beaconing and probing mechanisms of IEEE 802.11 to ensure that connected clients do not pay unnecessary overheads for detecting disconnected clients. Methods are also described for detecting and locating rogue devices by collaboratively collecting information from neighboring devices and comparing the information to a database.

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