公开(公告)号：US09503156B2

公开(公告)日：2016-11-22

申请号：US15045909

申请日：2016-02-17

Applicant: Texas Instruments Incorporated

Inventor： Ramanuja Vedantham ,  Anand Dabak ,  Tarkesh Pande

IPC: H04B3/00 ,  H04B3/54 ,  H04L5/14

CPC classification number: H04B3/54 ,  H04B3/546 ,  H04B2203/5408 ,  H04B2203/5433 ,  H04B2203/5445 ,  H04L5/14

Abstract: Systems and methods for enabling co-existence among power line communications (PLC) technologies are described. In some embodiments, a method performed by a PLC device, such as a PLC gateway, may include searching for and detecting a co-existence preamble on a PLC network while not transmitting or receiving frames. The device waits a time period before attempting transmission of a frame if the coexistence preamble is detected and is not followed by a native preamble. Transmissions are resumed to the PLC network after expiration of the time period.

Abstract translation: 描述了实现电力线通信（PLC）技术共存的系统和方法。 在一些实施例中，由诸如PLC网关的PLC设备执行的方法可以包括在不发送或接收帧的情况下在PLC网络上搜索和检测共存前导码。 如果检测到共存前导码，则设备在尝试发送帧之前等待一段时间，并且不跟随本机前同步码。 传输在该时间段到期后恢复到PLC网络。

公开(公告)号：US20160330213A1

公开(公告)日：2016-11-10

申请号：US15216291

申请日：2016-07-21

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande

IPC: H04L29/06

CPC classification number: H04L63/123 ,  G06F15/177 ,  H04B3/54 ,  H04B3/542 ,  H04B2203/5408 ,  H04L9/0819 ,  H04L9/30 ,  H04L9/3242 ,  H04L63/0428 ,  H04L63/061 ,  H04L63/0876 ,  H04L2209/24

Abstract: Embodiments of the invention provide systems and methods for a cipher then segment approach in a Power Line Communication (PLC). A node or device generates frames to be transmitted to a destination node in the PLC network. A processor in the node is configured to generate a data payload comprising data to be sent to the destination node. The processor divides the data payload into two or more payload segments and encrypts the payload segments. The processor creates a frame for each of the encrypted payload segments, wherein each frame comprises a message integrity code. The processor creates a segment identifier for each frame using the message integrity code and an authentication key that is shared with the destination PLC node. The segment identifier is added to each frame.

公开(公告)号：US09438309B2

公开(公告)日：2016-09-06

申请号：US14990471

申请日：2016-01-07

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Il Han Kim

IPC: H04B3/00 ,  H04B3/54 ,  H04B3/46

CPC classification number: H04B3/54 ,  H04B3/46 ,  H04B3/542 ,  H04B2203/5495

Abstract: Apparatus (and related methods) for a power line communication network include a processor configured to receive beacons over a communication interface. The processor determines a link quality indicator (LQI) for each received beacon and ignores the beacons for at most a predetermined maximum number of beacon receptions when each LQI is below a threshold. The processor responds to a received beacon if the LQI for such received beacon exceeds the threshold or if a predetermined maximum number of beacons have been received with LQIs below the threshold.

Abstract translation: 用于电力线通信网络的装置（和相关方法）包括被配置为通过通信接口接收信标的处理器。 处理器为每个接收到的信标确定链路质量指示符（LQI），并且当每个LQI低于阈值时，忽略至多一个预定最大数量的信标接收的信标。 如果用于这种接收到的信标的LQI超过阈值，或者如果已经接收到具有低于阈值的LQI的预定最大数量的信标，则处理器响应于所接收的信标。

公开(公告)号：US20160080169A1

公开(公告)日：2016-03-17

申请号：US14949069

申请日：2015-11-23

Applicant: Texas Instruments Incorporated

Inventor： Ramanuja Vedantham ,  Kumaran Vijayasankar

IPC: H04L12/413 ,  H04L1/00 ,  H04L5/00 ,  H04B3/54

CPC classification number: H04L12/413 ,  H04B3/54 ,  H04B2203/5408 ,  H04B2203/5425 ,  H04L1/0002 ,  H04L5/0007 ,  H04W74/0816

Abstract: Transmission over a communication channel using carrier sense multiple access collision avoidance (CSMA/CA) may be performed by determining for each frame if the communication channel is busy after a backoff time proportional to a randomly generated number within a contention window (CW). When the channel is not busy, a frame of data may be transmitted. When the channel is busy, the device may periodically determine if the communication channel is busy after subsequent backoff times. The value of CW is adjusted for each subsequent backoff time using a fairness protocol, in which the value of CW is increased until the value of CW reaches a maximum CW value; and then the value of CW is held until a fairness number of backoff repetitions reaches a fairness threshold; then the value of CW is reduced incrementally until the value of CW reaches a minimum CW value.

Abstract translation: 如果通信信道在竞争窗口（CW）中与随机生成的数字成比例的退避时间之后通信信道为忙，则可以通过确定每个帧来执行使用载波侦听多址冲突避免（CSMA / CA）的通信信道上的传输。 当信道不忙时，可以发送一帧数据。 当信道繁忙时，设备可以在后续的退避时间周期性地确定通信信道是否正在占线。 使用公平协议对每个后续退避时间调整CW的值，其中CW的值增加，直到CW的值达到最大CW值; 然后持续CW的值，直到公平的退避次数达到公平阈值; 则CW的值逐渐减小，直到CW的值达到最小CW值。

公开(公告)号：US09143983B2

公开(公告)日：2015-09-22

申请号：US14301656

申请日：2014-06-11

Applicant: Texas Instruments Incorporated

Inventor： Ariton E Xhafa ,  Yanjun Sun ,  Ramanuja Vedantham

IPC: H04L12/43 ,  H04W28/06 ,  H04L1/18 ,  H04W84/12 ,  H04W88/06 ,  H04W28/04 ,  H04W84/18

CPC classification number: H04W28/065 ,  H04L1/1854 ,  H04W28/04 ,  H04W84/12 ,  H04W84/18 ,  H04W88/06

Abstract: A wireless combination (combo) device is coupled to an antenna for communicating via a first wireless network over a first band. A packet aggregator is coupled to the first wireless transceiver configures a frame aggregated packet for at least a portion of activities on the first wireless network. The frame aggregated packet includes a plurality of data packets and a dummy packet or spoofing so that said frame aggregated packet is extended in time or indicates an extension sufficient to overlap a Tx time interval or Rx time interval for communications occurring over a second wireless network. The first wireless network and said second wireless network are overlapping networks.

Abstract translation: 无线组合（组合）设备被耦合到天线，用于经由第一频带经由第一无线网络进行通信。 耦合到第一无线收发器的分组聚合器为第一无线网络上的活动的至少一部分配置帧聚合分组。 帧聚合分组包括多个数据分组和虚拟分组或欺骗，使得所述帧聚合分组在时间上被扩展或指示足以与通过第二无线网络发生的通信的Tx时间间隔或Rx时间间隔重叠的扩展。 第一无线网络和所述第二无线网络是重叠的网络。

公开(公告)号：US20150172073A1

公开(公告)日：2015-06-18

申请号：US14631669

申请日：2015-02-25

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham

IPC: H04L12/413 ,  H04L5/00 ,  H04L27/26 ,  H04B3/54

CPC classification number: H04L12/413 ,  H04B3/542 ,  H04B3/544 ,  H04B2203/5408 ,  H04B2203/5454 ,  H04L1/0041 ,  H04L1/0065 ,  H04L1/0067 ,  H04L1/08 ,  H04L1/1671 ,  H04L1/18 ,  H04L5/0044 ,  H04L5/0094 ,  H04L27/2601 ,  H04L27/2646

Abstract: Segmented frames of data may be transmitted from a transmitting device using conflict free slots (CFS) within a carrier sense multiple access with collision avoidance (CSMA/CA) protocol on a noisy media. At a receiver, a segmented frame of data is received. The data is represented by a plurality of tones. If requested by the transmitter, a tone map response command is prepared that specifies a set of optimized tone map parameters by analyzing the received frame of data. Any previously determined tone map response commands to the transmitting device are deleted. A sequence of frame segments may be received in conflict free slots, but only one tone map response is transmitted to the transmitting device after receiving the entire sequence of frame segments.

Abstract translation: 数据帧可以在具有冲突避免（CSMA / CA）协议的载波侦听多路访问中使用无冲突时隙（CFS）从发送设备发送。 在接收机处，接收分段的数据帧。 数据由多个音调表示。 如果由发射机请求，则通过分析接收的数据帧来准备一个音调映射响应命令，该命令指定一组优化的音调映射参数。 任何先前确定的发送设备的音调映射响应命令被删除。 可以在无冲突时隙中接收帧序列，但是在接收到整个帧段序列之后，只有一个音调映射响应被发送到发送设备。

公开(公告)号：US20150016393A1

公开(公告)日：2015-01-15

申请号：US14496923

申请日：2014-09-25

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Ariton E. Xhafa ,  Yanjun Sun ,  Ramanuja Vedantham

IPC: H04W72/12

CPC classification number: H04W72/1215 ,  H04W4/80 ,  H04W16/14 ,  H04W84/12 ,  H04W88/06

Abstract: Embodiments provide systems and methods to optimize the time when to receive transmissions from dissimilar wireless networks, and hence, improve the overall network throughput and avoid access point transmission rate fall-back mechanism having an avalanche effect during coexistence of dissimilar wireless network technologies. A receiver comprises at least two dissimilar network technology subsystems and is able to receive transmissions from dissimilar wireless network technology subsystems during a predetermined reception window.

Abstract translation: 实施例提供了用于优化从不同的无线网络接收传输的时间的系统和方法，并且因此提高了整体网络吞吐量，并且避免了在不同的无线网络技术共存期间具有雪崩效应的接入点传输速率下降机制。 接收机包括至少两个不同的网络技术子系统，并且能够在预定的接收窗口期间从不同的无线网络技术子系统接收传输。

公开(公告)号：US20140293984A1

公开(公告)日：2014-10-02

申请号：US14301656

申请日：2014-06-11

Applicant: Texas Instruments Incorporated

Inventor： Ariton E. Xhafa ,  Yanjun Sun ,  Ramanuja Vedantham

IPC: H04W28/06 ,  H04W88/06 ,  H04W84/12

CPC classification number: H04W28/065 ,  H04L1/1854 ,  H04W28/04 ,  H04W84/12 ,  H04W84/18 ,  H04W88/06

Abstract: A wireless combination (combo) device is coupled to an antenna for communicating via a first wireless network over a first band. A packet aggregator is coupled to the first wireless transceiver configures a frame aggregated packet for at least a portion of activities on the first wireless network. The frame aggregated packet includes a plurality of data packets and a dummy packet or spoofing so that said frame aggregated packet is extended in time or indicates an extension sufficient to overlap a Tx time interval or Rx time interval for communications occurring over a second wireless network. The first wireless network and said second wireless network are overlapping networks.

Abstract translation: 无线组合（组合）设备被耦合到天线，用于经由第一频带经由第一无线网络进行通信。 耦合到第一无线收发器的分组聚合器为第一无线网络上的活动的至少一部分配置帧聚合分组。 帧聚合分组包括多个数据分组和虚拟分组或欺骗，使得所述帧聚合分组在时间上被扩展或指示足以与通过第二无线网络发生的通信的Tx时间间隔或Rx时间间隔重叠的扩展。 第一无线网络和所述第二无线网络是重叠的网络。

公开(公告)号：US20140056369A1

公开(公告)日：2014-02-27

申请号：US13971638

申请日：2013-08-20

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Ramanuja Vedantham ,  Kumaran Vijayasankar ,  Xiaolin Lu

IPC: H04B3/54

CPC classification number: H04B3/544 ,  H04B2203/5408 ,  H04B2203/5445

Abstract: A power line communication device connected to a power line communication network that includes a transceiver to transmit messages to a plurality of nodes on the network and to receive messages from the plurality of nodes on the network, and a processor coupled to the transceiver to evaluate received messages and generate messages to transmit. The processor, upon receiving a promotion needed message from an additional power line communication (PLC) device joining the network, is to determine whether data communication has already been established with a base node of the network, determine whether the device is already seeking promotion to be a switch node or has already been promoted to the switch node, and determine a signal quality of the received promotion needed message from the additional PLC device joining the network. Based on those determinations, the processor is to adjust a frequency at which to transmit a promotion request based on a number of promotion requests received from the plurality of other nodes on the network and a number of promotion needed messages received.

Abstract translation: 一种连接到电力线通信网络的电力线通信设备，该电力线通信网络包括：收发器，用于向所述网络上的多个节点发送消息并从所述网络上的所述多个节点接收消息;以及处理器，耦合到所述收发器以评估接收到的 消息并生成要发送的消息。 处理器在接收到来自加入网络的附加电力线通信（PLC）设备的促销需求消息时，是确定数据通信是否已经与网络的基站节点建立，确定设备是否已经在寻求促销 作为交换节点，或者已经被提升到交换节点，并且从加入网络的附加PLC设备确定接收到的促销所需消息的信号质量。 基于这些确定，处理器是基于从网络上的多个其他节点接收到的促销请求的数量以及接收到的促销所需消息的数量来调整用于发送促销请求的频率。

公开(公告)号：US20140029583A1

公开(公告)日：2014-01-30

申请号：US13748083

申请日：2013-01-23

Applicant: Texas Instruments Incorporated

Inventor： Ariton E. Xhafa ,  Yanjun Sun ,  Ramanuja Vedantham

IPC: H04W88/06

CPC classification number: H04W72/1215 ,  H04W4/80 ,  H04W16/14 ,  H04W84/12 ,  H04W88/06

Abstract: Embodiments provide systems and methods to optimize the time when to transmit a silencing frame, and hence, improve the overall network throughput and avoid access point transmission rate fall-back mechanism having an avalanche effect during coexistence of dissimilar wireless network technologies. A device comprises at least two dissimilar network technology subsystems, at least one subsystem of which is lower priority than at least another of the dissimilar subsystems. In some embodiments, a device is able to transmit a silencing frame during a transmission window within a lower priority technology network interval. In other embodiments, a device calculates a transmission window, the transmission window to occur within a lower priority technology network interval, and transmits a silencing frame during the transmission window. In further embodiments, a device is able to calculate a transmission window to occur during a lower priority technology network interval, and transmit a silencing frame during the calculated transmission window.

Abstract translation: 实施例提供了用于优化传输消音帧的时间的系统和方法，从而提高整体网络吞吐量，并避免在不同的无线网络技术共存期间具有雪崩效应的接入点传输速率回退机制。 一种设备包括至少两个不同的网络技术子系统，其至少一个子系统的优先级低于至少另一个不同子系统。 在一些实施例中，设备能够在较低优先级技术网络间隔内的传输窗口期间传输消音帧。 在其他实施例中，设备计算发送窗口，发送窗口发生在较低优先级的技术网络间隔内，并且在发送窗口期间发送消音帧。 在另外的实施例中，设备能够计算在较低优先级技术网络间隔期间发生的传输窗口，并且在计算的传输窗口期间传送消音帧。