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公开(公告)号：US20130083789A1
公开(公告)日：2013-04-04
申请号：US13633834
申请日：2012-10-02
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Jin-Meng Ho
IPC: H04W56/00
CPC classification number: H04W56/003 , H04W56/001 , H04W56/0015 , H04W56/002
Abstract: Embodiments provide a method to accommodate clock drift and guard time in a distributed fashion. A first device is adapted to communicate with a second device. A clock in the first device is synchronized to a clock in the second device using beacon or/and acknowledgement frames from the second device. A nominal guard time is computed that accounts for clock drift in the first and second devices during a nominal synchronization interval. An additional guard time is computed that accounts for clock drift in the first and second devices during an additional interval beyond the nominal synchronization interval. An available transmission interval is determined within an allocation interval for transmissions between the devices, wherein the beginning and/or the end of the available transmission interval are selected by accounting for the nominal guard time and/or the additional guard time. One or more frames are transmitted within the available transmission interval.
Abstract translation: 实施例提供了以分布式方式适应时钟漂移和保护时间的方法。 第一设备适于与第二设备通信。 第一设备中的时钟使用来自第二设备的信标或/和确认帧与第二设备中的时钟同步。 计算在额定同步间隔期间考虑第一和第二设备中的时钟漂移的标称保护时间。 计算额外的保护时间，其在超过标称同步间隔的附加间隔期间考虑第一和第二设备中的时钟漂移。 在用于设备之间的传输的分配间隔内确定可用传输间隔，其中通过计算标称保护时间和/或附加保护时间来选择可用传输间隔的开始和/或结束。 在可用传输间隔内传输一个或多个帧。
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公开(公告)号：US10334530B2
公开(公告)日：2019-06-25
申请号：US16100982
申请日：2018-08-10
Applicant: Texas Instruments Incorporated
Inventor： Jin-Meng Ho
Abstract: A system and method for managing power in a subnet having a hub in communication with one or more nodes is disclosed. The hub and nodes communicate using one or more non-contention access methods, such as scheduled, polled or posted access. The node may enter a sleep or hibernation state while no scheduled, polled or posted allocation interval is pending. The hibernation state allows the node to hibernate through one or more entire beacon periods. In the sleep state, the node may be asleep between any scheduled, polled and posted allocation intervals for the node or during another node's scheduled allocation interval in a current beacon period. By selecting which access scheme is in use, the node and hub can increase the node's chances to be in hibernation or sleep state and minimize power consumption.
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公开(公告)号：US10080195B2
公开(公告)日：2018-09-18
申请号：US15783422
申请日：2017-10-13
Applicant: Texas Instruments Incorporated
Inventor： Jin-Meng Ho
CPC classification number: H04W52/0235 , H04W48/16 , H04W52/0216 , H04W52/0248 , H04W72/0413 , H04W72/042 , H04W74/006 , H04W74/06 , Y02D70/00
Abstract: A system and method for managing power in a subnet having a hub in communication with one or more nodes is disclosed. The hub and nodes communicate using one or more non-contention access methods, such as scheduled, polled or posted access. The node may enter a sleep or hibernation state while no scheduled, polled or posted allocation interval is pending. The hibernation state allows the node to hibernate through one or more entire beacon periods. In the sleep state, the node may be asleep between any scheduled, polled and posted allocation intervals for the node or during another node's scheduled allocation interval in a current beacon period. By selecting which access scheme is in use, the node and hub can increase the node's chances to be in hibernation or sleep state and minimize power consumption.
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公开(公告)号：US09756661B2
公开(公告)日：2017-09-05
申请号：US14567410
申请日：2014-12-11
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Jin-Meng Ho
CPC classification number: H04W74/06 , H04J3/1682 , H04L67/12
Abstract: A system and method for providing communications between a hub (medical controller) and a node (an implant) are disclosed. The hub selects an operating channel within a channel group in accordance with applicable regulations, and transmits signals to facilitate communications with nodes. A node sequentially tunes to individual channels within the group, monitoring each channel for a hub transmission during a monitoring period. If a hub transmission is detected, the node stays on the current channel. Otherwise, the node tunes to a next channel in the channel group. The hub transmission may be directed to unconnected nodes, to a single connected node, or to a group of connected nodes. The node transmits a first frame to the hub at a designated transmission time and receives a response. The node reports an emergency by sequentially transmitting emergency frames on each of the channels until receiving an acknowledgment from the hub.
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公开(公告)号：US09560024B2
公开(公告)日：2017-01-31
申请号：US14593628
申请日：2015-01-09
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Jin-Meng Ho
CPC classification number: H04L63/0428 , H04L9/0844 , H04L9/0869 , H04L9/3242 , H04L63/061
Abstract: A system and method for establishing a pairwise temporal key (PTK) between two devices based on a shared master key and using a single message authentication codes (MAC) algorithm is disclosed. The devices use the shared master key to independently compute four MACs representing the desired PTK, a KCK, and a first and a second KMAC. The Responder sends its first KMAC to the Initiator, which retains the computed PTK only if it verifies that the received first KMAC equals its computed first KMAC and hence that the Responder indeed possesses the purportedly shared master key. The Initiator sends a third message including the second KMAC to the Responder. The Responder retains the computed PTK only if it has verified that the received second KMAC equals its computed second KMAC and hence that the Initiator indeed possesses the purportedly shared master key.
Abstract translation: 公开了一种基于共享主密钥和使用单个消息认证码（MAC）算法在两个设备之间建立成对时间密钥（PTK）的系统和方法。 这些设备使用共享主密钥来独立地计算表示期望的PTK，KCK和第一和第二KMAC的四个MAC。 响应者将其第一个KMAC发送到启动器，该启动器仅在验证接收到的第一个KMAC等于其计算的第一个KMAC时保留计算的PTK，并且因此响应者确实拥有所谓的共享主密钥。 发起方将第二个消息包括第二个KMAC发送给响应者。 响应者只有在已经验证接收到的第二个KMAC等于其计算的第二个KMAC的情况下才保留计算的PTK，因此启动器确实拥有所谓的共享主密钥。
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Patent Agency Ranking
公开(公告)号：US09374444B2
公开(公告)日：2016-06-21
申请号：US14567700
申请日：2014-12-11
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Jin-Meng Ho
CPC classification number: H04L69/22 , G06Q10/06 , G06Q50/32 , H04B13/005 , H04L9/0861 , H04W72/0446
Abstract: A system and method for providing a variety of medium access and power management methods are disclosed. A defined frame structure allows a hub and a node to use said methods for secured or unsecured communications with each other. Contended access is available during a random access phase. The node uses an alternate doubling of a backoff counter to reduce interference and resolve collisions with other nodes attempting to communicate with the hub in the random access phase. Non-contended access is also available, and the hub may schedule reoccurring or one-time allocation intervals for the node. The hub and the node may also establish polled and posted allocation intervals on an as needed basis. The node manages power usage by being at active mode at times during the beacon period when the node is expected to transmit or receive frames.
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37.发明授权公开(公告)号：US09306743B2
公开(公告)日：2016-04-05
申请号：US13969133
申请日：2013-08-16
Applicant: Texas Instruments Incorporated
Inventor： Jin-Meng Ho
CPC classification number: H04L9/3268 , B60R25/10 , B60R25/24 , G07C9/00007 , H04L9/0827 , H04L9/0861 , H04L9/0891 , H04L9/0894 , H04L9/3226 , H04L2209/84
Abstract: Embodiments of the invention provide methods for key fob to control unit verification, retention, and revocation. After an initial pairing between a key fob and a control unit, the devices share a secret operation key (OpKey). For verification, the key fob sends the 8 lowest-order bits of a 128-bit counter and some bits of an AES-128, OpKey encrypted value of the counter to the control unit. For key revocation and retention, the control unit is prompted to enter an OpKey retention and revocation mode. Subsequently, each of the remaining or new key fobs is prompted by the user to send a verification message to the control unit. When the control unit is prompted to exit the OpKey retention and revocation mode, it retains the OpKeys of only the key fobs that sent a valid verification message immediately before entering and exiting the OpKey retention and revocation mode.
Abstract translation: 本发明的实施例提供了用于控制单元验证，保留和撤销的密钥卡的方法。 在密钥卡和控制单元之间的初始配对之后，设备共享秘密操作密钥（OpKey）。 为了验证，密钥卡将128位计数器的8个最低位和计数器的AES-128，OpKey加密值的一些位发送到控制单元。 对于关键撤销和保留，提示控制单元进入OpKey保留和撤销模式。 随后，用户提示剩余或新的密钥卡中的每一个向控制单元发送验证消息。 当控制单元被提示退出OpKey保留和撤销模式时，它仅保留在进入和退出OpKey保留和撤销模式之前立即发送有效验证消息的密钥框的OpKey。
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公开(公告)号：US20160072589A1
公开(公告)日：2016-03-10
申请号：US14828233
申请日：2015-08-17
Applicant: Texas Instruments Incorporated
Inventor： Jin-Meng Ho
IPC: H04B15/00
Abstract: A system and method for minimizing or preventing interference between wireless networks is disclosed. A network hub broadcasts a beacon signal within repeating beacon periods. The position of the beacon signal shifts within each beacon period based upon a predetermined pseudo-random sequence. The beacon signal includes data identifying the current beacon shift sequence and the current phase of the sequence. Neighboring hubs independently or jointly determine and broadcast their own beacon shift sequences and phases for their respective networks from a predetermined list. Nodes connected with the network hubs are assigned allocation intervals having a start time that is set relative to the beacon signal. The start time and duration of the allocation interval wraps around the beacon period if the allocation-interval would otherwise start or continue in a next beacon period.
Abstract translation: 公开了一种用于最小化或防止无线网络之间的干扰的系统和方法。 网络中心在重复信标周期内广播信标信号。 信标信号的位置基于预定的伪随机序列在每个信标周期内移动。 信标信号包括识别当前信标移位序列和序列的当前相位的数据。 相邻集线器从预定列表独立地或联合地确定并广播它们自己的各自网络的信标移位序列和相位。 与网络集线器连接的节点被分配具有相对于信标信号设置的开始时间的分配间隔。 如果分配间隔否则将在下一个信标周期中开始或继续，则分配间隔的开始时间和持续时间卷绕信标周期。
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公开(公告)号：US09258783B2
公开(公告)日：2016-02-09
申请号：US14174460
申请日：2014-02-06
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Jin-Meng Ho
CPC classification number: H04W52/0235 , H04W48/16 , H04W52/0216 , H04W52/0248 , H04W72/0413 , H04W72/042 , H04W74/006 , H04W74/06 , Y02D70/00
Abstract: A system and method for managing power in a subnet having a hub in communication with one or more nodes is disclosed. The hub and nodes communicate using one or more non-contention access methods, such as scheduled, polled or posted access. The node may enter a sleep or hibernation state while no scheduled, polled or posted allocation interval is pending. The hibernation state allows the node to hibernate through one or more entire beacon periods. In the sleep state, the node may be asleep between any scheduled, polled and posted allocation intervals for the node or during another node's scheduled allocation interval in a current beacon period. By selecting which access scheme is in use, the node and hub can increase the node's chances to be in hibernation or sleep state and minimize power consumption.
Abstract translation: 公开了一种用于管理具有与一个或多个节点通信的集线器的子网中的电力的系统和方法。 集线器和节点使用一个或多个非争用访问方法进行通信，例如安排，轮询或发布访问。 节点可能进入睡眠或休眠状态，而没有调度，轮询或发布的分配间隔未决。 休眠状态允许节点通过一个或多个整个信标周期进行休眠。 在睡眠状态下，节点可以在节点的任何调度，轮询和发布的分配间隔之间或在当前信标周期中的另一节点的调度分配间隔期间睡眠。 通过选择使用哪种接入方案，节点和集线器可以增加节点处于休眠或休眠状态的机会，并最大限度地降低功耗。
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40.发明申请公开(公告)号：US20140161252A1
公开(公告)日：2014-06-12
申请号：US13969133
申请日：2013-08-16
Applicant: Texas Instruments Incorporated
Inventor： Jin-Meng Ho
CPC classification number: H04L9/3268 , B60R25/10 , B60R25/24 , G07C9/00007 , H04L9/0827 , H04L9/0861 , H04L9/0891 , H04L9/0894 , H04L9/3226 , H04L2209/84
Abstract: Embodiments of the invention provide methods for key fob to control unit verification, retention, and revocation. After an initial pairing between a key fob and a control unit, the devices share a secret operation key (OpKey). For verification, the key fob sends the 8 lowest-order bits of a 128-bit counter and some bits of an AES-128, OpKey encrypted value of the counter to the control unit. For key revocation and retention, the control unit is prompted to enter an OpKey retention and revocation mode. Subsequently, each of the remaining or new key fobs is prompted by the user to send a verification message to the control unit. When the control unit is prompted to exit the OpKey retention and revocation mode, it retains the OpKeys of only the key fobs that sent a valid verification message immediately before entering and exiting the OpKey retention and revocation mode.
Abstract translation: 本发明的实施例提供了用于控制单元验证，保留和撤销的密钥卡的方法。 在密钥卡和控制单元之间的初始配对之后，设备共享秘密操作密钥（OpKey）。 为了验证，密钥卡将128位计数器的8个最低位和计数器的AES-128，OpKey加密值的一些位发送到控制单元。 对于关键撤销和保留，提示控制单元进入OpKey保留和撤销模式。 随后，用户提示剩余或新的密钥卡中的每一个向控制单元发送验证消息。 当控制单元被提示退出OpKey保留和撤销模式时，它仅保留在进入和退出OpKey保留和撤销模式之前立即发送有效验证消息的密钥框的OpKey。
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