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51. 发明授权

US07613796B2 System and method for creating improved overlay network with an efficient distributed data structure 有权
标题翻译：用于创建具有高效分布式数据结构的改进覆盖网络的系统和方法
公开(公告)号：US07613796B2
公开(公告)日：2009-11-03
申请号：US10356961
申请日：2003-02-03
申请人： Nicholas J. Harvey , Michael B. Jones , Stefan Saroiu , Marvin M. Theimer , Alastair Wolman , Atul Adya
发明人： Nicholas J. Harvey , Michael B. Jones , Stefan Saroiu , Marvin M. Theimer , Alastair Wolman , Atul Adya
IPC分类号： G06F15/177
CPC分类号： H04L45/00 , H04L12/56 , H04L67/104 , H04L67/1065 , H04L69/329
摘要： A system and method for using skip nets to build and maintain overlay networks for peer-to-peer systems. A skip net is a distributed data structure that can be used to avoid some of the disadvantages of distributed hash tables by organizing data by key ordering. Skip nets can use logarithmic state per node and probabilistically support searches, insertions and deletions in logarithmic time.
摘要翻译：一种使用跳过网络构建和维护对等系统的覆盖网络的系统和方法。跳过网络是一种分布式数据结构，可以通过按键排序组织数据来避免分布式哈希表的一些缺点。跳过网络可以使用每个节点的对数状态，概率地支持对数时间的搜索，插入和删除。

52. 发明授权

US07603460B2 Detecting and diagnosing performance problems in a wireless network through neighbor collaboration 有权
标题翻译：通过邻居协作检测和诊断无线网络中的性能问题
公开(公告)号：US07603460B2
公开(公告)日：2009-10-13
申请号：US11047189
申请日：2005-01-31
申请人： Atul Adya , Paramvir Bahl , Ranveer Chandra , Lili Qiu
发明人： Atul Adya , Paramvir Bahl , Ranveer Chandra , Lili Qiu
IPC分类号： G06F15/173
CPC分类号： H04W24/08 , H04W88/02 , H04W88/08
摘要： Systems and methods are described for detecting and diagnosing performance problems in wireless communications networks. Diagnostic programs execute on a wireless device, neighboring devices, and a wireless access point to collaborate in diagnosing network problems. The neighboring devices eavesdrop on a diagnostic session between the device and the access point to determine problems at the device, the access point, and in the wireless medium. Data from the eavesdropping devices can be summarized and sent to a network administrator for further action. The diagnostic programs are described to contain a passive component for detecting problems, and an active component for running the diagnostic techniques.
摘要翻译：描述了用于检测和诊断无线通信网络中的性能问题的系统和方法。诊断程序在无线设备，相邻设备和无线接入点上执行以协作诊断网络问题。相邻设备窃听设备和接入点之间的诊断会话，以确定设备，接入点和无线介质中的问题。来自窃听设备的数据可以被汇总并发送给网络管理员进行进一步的操作。诊断程序被描述为包含用于检测问题的被动组件，以及用于运行诊断技术的活动组件。

53. 发明申请

US20090083407A1 CRISSCROSS CANCELLATION PROTOCOL 失效
公开(公告)号：US20090083407A1
公开(公告)日：2009-03-26
申请号：US11858140
申请日：2007-09-20
申请人： Atul Adya , Alastair Wolman , John D. Dunagan
发明人： Atul Adya , Alastair Wolman , John D. Dunagan
IPC分类号： G06F15/173 , G06F15/16
CPC分类号： H04L65/1003 , H04L43/10 , H04L67/14 , H04L67/142
摘要： Technologies, systems, and methods for ordered message delivery that avoid message races or crisscrosses between communicating nodes. For example, if Node A sends message 3 towards Node B and, shortly thereafter, Node B sends message X to Node A, Node A would like to know whether or not message X reflects Node B's state after receiving message 3. If Node B received message 3 prior to sending message X, then proper state may be maintained between the nodes. But if messages 3 and X crisscrossed, or if message 3 was never properly received by Node B, then the state between the nodes may be corrupt. Technologies, systems, and methods are provided to avoid such corruption.
摘要翻译：用于有序消息传递的技术，系统和方法，可避免通信节点之间的消息种族或交叉。例如，如果节点A向节点B发送消息3，并且此后不久，节点B向节点A发送消息X，则节点A想要知道消息X是否在接收到消息3之后反映节点B的状态。如果节点B接收到消息3在发送消息X之前，则可以在节点之间保持适当的状态。但如果消息3和X十字交叉，或者如果节点B从未正确接收到消息3，则节点之间的状态可能已损坏。提供了技术，系统和方法来避免这种腐败。

54. 发明授权

US07509423B2 Locating potentially identical objects across multiple computers based on stochastic partitioning of workload 有权
公开(公告)号：US07509423B2
公开(公告)日：2009-03-24
申请号：US10992024
申请日：2004-11-18
申请人： John R. Douceur , Marvin M. Theimer , Atul Adya , William J. Bolosky
发明人： John R. Douceur , Marvin M. Theimer , Atul Adya , William J. Bolosky
IPC分类号： G06F15/13
CPC分类号： G06F17/30156 , Y10S707/99944 , Y10S707/99946 , Y10S707/99952 , Y10S707/99953
摘要： Potentially identical objects (e.g., files) are located across multiple computers based on stochastic partitioning of workload. For each of a plurality of objects stored on a plurality of computers in a network, a portion of object information corresponding to the object is selected. The object information can be generated in a variety of manners (e.g., based on hashing the object, based on characteristics of the object, and so forth). Any of a variety of portions of the object information can be used (e.g., the least significant bits of the object information). A stochastic partitioning process is then used to identify which of the plurality of computers to communicate the object information to for identification of potentially identical objects on the plurality of computers.

55. 发明授权

US07505970B2 Serverless distributed file system 有权
公开(公告)号：US07505970B2
公开(公告)日：2009-03-17
申请号：US10959701
申请日：2004-10-06
申请人： Atul Adya , William J. Bolosky , Gerald Cermak , John R. Douceur , Marvin M. Theimer , Roger P. Wattenhofer
发明人： Atul Adya , William J. Bolosky , Gerald Cermak , John R. Douceur , Marvin M. Theimer , Roger P. Wattenhofer
IPC分类号： G06F7/00 , G06F17/30
CPC分类号： G06F17/30094 , G06F17/30171 , G06F17/30899 , G06F2201/825 , H04L63/0823 , H04L63/123 , Y10S707/956 , Y10S707/99931 , Y10S707/99938
摘要： A serverless distributed file system manages the storage of files and directories using one or more directory groups. The directories may be managed using Byzantine-fault-tolerant groups, whereas files are managed without using Byzantine-fault-tolerant groups. Additionally, the file system may employ a hierarchical namespace to store files. Furthermore, the directory group may employ a plurality of locks to control access to objects (e.g., files and directories) in each directory.

56. 发明申请

US20090019288A1 SECURE RECOVERY IN A SERVERLESS DISTRIBUTED FILE SYSTEM 有权
标题翻译：在无刷分布式文件系统中的安全恢复
公开(公告)号：US20090019288A1
公开(公告)日：2009-01-15
申请号：US12235343
申请日：2008-09-22
申请人： Miguel Oom Temudo de Castro , Atul Adya , John R. Douceur , William J. Bolosky
发明人： Miguel Oom Temudo de Castro , Atul Adya , John R. Douceur , William J. Bolosky
IPC分类号： H04L29/00 , G06F21/00
CPC分类号： H04L63/0435 , G06F17/30194 , G06F21/40 , G06F21/62 , G06F2221/2101 , H04L9/3236 , H04L9/3247 , H04L9/3255 , H04L63/0442 , H04L63/0823
摘要： 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 3f+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.
摘要翻译：如果认证者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表示系统可容忍的许多故障。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器，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。

57. 发明申请

US20060142033A1 Multi-radio unification protocol 有权
公开(公告)号：US20060142033A1
公开(公告)日：2006-06-29
申请号：US11361126
申请日：2006-02-24
申请人： Alastair Wolman , Atul Adya , Paramvir Bahl , Jitendra Padhye , Lidong Zhou
发明人： Alastair Wolman , Atul Adya , Paramvir Bahl , Jitendra Padhye , Lidong Zhou
IPC分类号： H04Q7/20
CPC分类号： H04W92/18 , H04L29/06 , H04L69/14 , H04W72/08 , H04W74/02 , H04W80/04 , H04W84/12 , H04W84/18 , H04W88/04 , H04W88/06
摘要： An invention is disclosed whereby a wireless network node, equipped with two or more radio transceivers statically tuned to non-interfering frequency channels, can make decisions regarding which channel to use when communicating with a neighboring wireless node. A multi-radio unification protocol implemented in a wireless node coordinates the use of multiple wireless network interface cards and provides a virtual layer that hides the multiple physical network interfaces from higher layers of a node's network protocol stack. The invention is applicable to wireless networks generally, including those in which some nodes do not have multiple radios or do not recognize the multi-radio unification protocol. The invention makes possible simultaneous transmissions using available channels, thereby reducing interference and delay while increasing the overall capacity of the network.

58. 发明申请

US20060068769A1 Detecting and diagnosing performance problems in a wireless network through neighbor collaboration 有权
公开(公告)号：US20060068769A1
公开(公告)日：2006-03-30
申请号：US11047189
申请日：2005-01-31
申请人： Atul Adya , Paramvir Bahl , Ranveer Chandra , Lili Qiu
发明人： Atul Adya , Paramvir Bahl , Ranveer Chandra , Lili Qiu
IPC分类号： H04M3/00
CPC分类号： H04W24/08 , H04W88/02 , H04W88/08
摘要： Systems and methods are described for detecting and diagnosing performance problems in wireless communications networks. Diagnostic programs execute on a wireless device, neighboring devices, and a wireless access point to collaborate in diagnosing network problems. The neighboring devices eavesdrop on a diagnostic session between the device and the access point to determine problems at the device, the access point, and in the wireless medium. Data from the eavesdropping devices can be summarized and sent to a network administrator for further action. The diagnostic programs are described to contain a passive component for detecting problems, and an active component for running the diagnostic techniques.

59. 发明申请

US20050289169A1 Lossless recovery for computer systems with map assisted state transfer 有权
标题翻译：具有地图辅助状态转移的计算机系统的无损恢复
公开(公告)号：US20050289169A1
公开(公告)日：2005-12-29
申请号：US10978280
申请日：2004-10-29
申请人： Atul Adya , Jacob Lorch , Ronnie Chaiken , William Bolosky
发明人： Atul Adya , Jacob Lorch , Ronnie Chaiken , William Bolosky
IPC分类号： G06F17/00
CPC分类号： G06F11/1482 , G06F11/203 , Y10S707/99942 , Y10S707/99944 , Y10S707/99953
摘要： An architecture and implementation for losslessly restarting subsystems in a distributed file system is described. By partitioning functionality and logging appropriately across the kernel and user-level boundaries on a client, the user-level subsystem may be made losslessly restartable. A particular use of transactions achieves efficiency while retaining simplicity. Practical mechanisms for supporting state-based recovery in replicated state machines and like replica are described. In particular, a map assisted state transfer may include receiving one or more state updates, marshaling one or more active data-structures into a marshaled shadow, applying the received state updates to the marshaled shadow and re-instantiating the active data-structures by unmarshaling the marshaled shadow. While active data-structures may include invariance relationships, the marshaled shadow may be structured to support independence from invariance relationships between the shadows of the active data-structures, as well as efficient incremental state update application and unmarshaling to re-instantiate the active data-structures.
摘要翻译：描述了在分布式文件系统中无损重新启动子系统的架构和实现。通过在客户端上的内核和用户级别边界之间适当分区功能和日志记录，用户级子系统可以无损重新启动。交易的特定用途在保持简单性的同时实现效率。描述了在复制状态机中支持状态恢复的实际机制，例如副本。特别地，地图辅助状态传送可以包括接收一个或多个状态更新，将一个或多个活动数据结构封送到封送的阴影中，将接收的状态更新应用于封送的阴影，并通过解组合来重新实例化活动数据结构封闭的阴影。虽然活动的数据结构可能包括不变性关系，但是组织的阴影可以被构造为支持独立于活动数据结构的阴影之间的不变性关系，以及有效的增量状态更新应用和解组以重新实例化活动数据 - 结构。

60. 发明授权

US06981138B2 Encrypted key cache 有权
公开(公告)号：US06981138B2
公开(公告)日：2005-12-27
申请号：US09817812
申请日：2001-03-26
申请人： John R. Douceur , Atul Adya , William J. Bolosky , Marvin M. Theimer
发明人： John R. Douceur , Atul Adya , William J. Bolosky , Marvin M. Theimer
IPC分类号： H04L9/08 , H04L9/30 , H04L9/00
CPC分类号： H04L9/0825 , H04L9/0894
摘要： A file that has been encrypted using a symmetric key and that has a corresponding access control entry with the symmetric key encrypted using the public key of a public/private key pair can be accessed. An encrypted key cache is also accessed to determine whether an access control entry to symmetric key mapping exists in the cache for the access control entry corresponding to the file. If such a mapping exists in the cache, then the mapped-to symmetric key is obtained form the cache, otherwise the encrypted symmetric key is decrypted using the private key of the public/private key pair. The encrypted key cache itself can also be encrypted and stored as an encrypted file.

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