-
公开(公告)号：US09894189B2
公开(公告)日：2018-02-13
申请号：US15419045
申请日：2017-01-30
Applicant: Texas Instruments Incorporated
Inventor： Gang Xu , Ramanuja Vedantham , Kumaran Vijayasankar , Anand G. Dabak , Tarkesh Pande , Il Han Kim , Xiaolin Lu
CPC classification number: H04L69/22 , H04B3/54 , H04B3/542 , H04B2203/5408
Abstract: In a disclosed embodiment, a method for communication in a network includes receiving, at a first device registered to the network, a physical layer (PHY) frame that includes a PHY header and a MAC header. The PHY frame may further include a MAC payload. The PHY header includes a destination address field. The method further includes comparing a network address of the first device to the destination address field to determine whether the destination address field stores a value having the same number of bits as the network address. When the comparison indicates that the value stored by the destination address field does not have the same number of bits as the network address, the method skips decoding the MAC header and the MAC payload.
-
公开(公告)号：US09774535B2
公开(公告)日：2017-09-26
申请号：US15462703
申请日：2017-03-17
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Kumaran Vijayasankar , Ramanuja Vedantham , Anand G. Dabak , Tarkesh Pande , Il Han Kim
IPC: H04L12/24 , H04L12/801 , H04L12/835 , H04B3/54
CPC classification number: H04L47/266 , H04B3/542 , H04B2203/5408 , H04L47/12 , H04L47/127 , H04L47/30 , H04L47/32 , Y02D50/10
Abstract: A method of powerline communications in a powerline communications (PLC) network including a first node and at least a second node. The first node transmits a data frame to the second node over a PLC channel. The second node has a data buffer for storing received information. The second node runs a flow control algorithm which determines a current congestion condition or a projected congestion condition of the data buffer based on at least one congestion parameter. The current congestion condition and projected congestion condition include nearly congested and fully congested. When the current or projected congestion condition is either nearly congested or fully congested, the second node transmits a BUSY including frame over the PLC channel to at least the first node. The first node defers transmitting of any frames to the second node for a congestion clearing wait time.
-
公开(公告)号：US09774471B2
公开(公告)日：2017-09-26
申请号：US15353223
申请日：2016-11-16
Applicant: Texas Instruments Incorporated
Inventor： Ramanuja Vedantham , Kumaran Vijayasankar
IPC: H04L12/413 , H04W74/08 , H04B3/54 , H04L1/00 , H04L5/00
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.
-
公开(公告)号：US09742785B2
公开(公告)日：2017-08-22
申请号：US15216291
申请日：2016-07-21
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Kumaran Vijayasankar , Ramanuja Vedantham , Tarkesh Pande
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：US09654302B2
公开(公告)日：2017-05-16
申请号：US15192932
申请日：2016-06-24
Applicant: Texas Instruments Incorporated
Inventor： Kumaran Vijayasankar , Ramanuja Vedantham , Anand G. Dabak
IPC: H04L12/413 , H04B3/54 , H04L29/06
CPC classification number: H04L12/413 , H04B3/54 , H04B3/542 , H04B2203/5408 , H04B2203/5433 , H04L69/02
Abstract: Power Line Communications (PLC) device for enhanced carrier sense multiple access (CSMA) protocols are described. The PLC device includes a modem, an AC interface and a PLC engine. The engine is configured for transmitting PLC packets over a plurality of electrical wires using a particular channel. Transmitting a normal priority packet may include attempting to access a communications channel to transmit a frame after a backoff time proportional to a randomly generated number within a contention window (CW), the CW having an initial value carried over from a previous transmission of a different frame. Additionally or alternatively, some of techniques described herein may facilitate the spreading of the time over which devices attempt to transmit packets, thereby reducing the probability of collisions using, for example, Additive Decrease Multiplicative Increase (ADMI) mechanisms.
-
Patent Agency Ranking
公开(公告)号：US09641219B2
公开(公告)日：2017-05-02
申请号：US14886961
申请日：2015-10-19
Applicant: Texas Instruments Incorporated
Inventor： Tarkesh Pande , Anand Dabak , Kumaran Vijayasankar , Ramanuja Vedantham , Il Han Kim
CPC classification number: H04B3/54 , H04B2203/5416 , H04L5/0094 , H04L27/04 , H04L27/18 , H04L27/2602 , H04L27/32
Abstract: Systems and methods for routing protocols for power line communications (PLC) are described. In some embodiments, a method performed by a PLC device, such as a PLC meter, may include selecting one or more transmit sub-bands on which to transmit frames, where the transmit sub-bands comprise groups of carrier frequencies. The PLC device then generates a frame comprising a tone map that indicates which transmit sub-bands are used to carry data for the frame. The tone map using two bits per transmit sub-band to indicate a status of each transmit sub-band. The PLC device then transmits the frame on the selected transmit sub-bands. A resolution bit and a mode bit may be used to provide additional information about the transmit sub-bands, such as an amount of power adjustment that has been applied to carrier frequencies and whether dummy bits are transmitted on unused carrier frequencies.
-
公开(公告)号：US09615315B2
公开(公告)日：2017-04-04
申请号：US15013062
申请日：2016-02-02
Applicant: Texas Instruments Incorporated
Inventor： Kumaran Vijayasankar , Ramanuja Vedantham , Robert Liang
CPC classification number: H04W48/10 , H04B3/542 , H04B2203/5408 , H04B2203/5416 , H04B2203/5433 , H04L41/0631 , H04L69/324 , H04W4/80 , H04W12/06 , H04W24/04 , H04W48/16 , H04W48/17
Abstract: Disclosed embodiments include a system having one or more member devices coupled to a network and a power line communication (PLC) device. The PLC device is configured to identify available bootstrapping agents that correspond to the one or more member devices, each available bootstrapping agent having a corresponding personal area network (PAN) identifier, identify a target network having a PAN identifier to join, select a target bootstrapping agent from available bootstrapping agents associated with the target PAN identifier to use for a join process with the target network, attempt to join the target network using the target bootstrapping agent, and when the attempt to join is successful, transmit and receive PLC signals over at least one power line associated with the target network using a particular frequency band and a modulation scheme.
-
68.发明授权System and method for avoiding hidden node collisions in a communication network 有权避免通信网络隐藏节点冲突的系统和方法公开(公告)号：US09450708B2
公开(公告)日：2016-09-20
申请号：US14246872
申请日：2014-04-07
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Kumaran Vijayasankar , Ram Krishnan , Ramanuja Vedantham
CPC classification number: H04L1/16 , H04L1/1671 , H04L69/324
Abstract: Method and apparatus for avoiding hidden node collisions in a communication network. A network communication device includes a packet transmitter. The packet transmitter is configured to subdivide a packet to be transmitted via a communication network into a plurality of segments based on the packet exceeding a predetermined maximum size, and to sequentially transmit the segments via the communication network. The packet transmitter is also configured to construct an acknowledgement packet responsive to reception of each segment of a packet received via the communication network. The acknowledgement packet includes a field indicating whether an additional segment of the packet is to be transmitted via the communication network. The packet transmitter is further configured to transmit the acknowledgement packet via the communication network.
Abstract translation: 用于避免通信网络中的隐藏节点冲突的方法和装置。 网络通信设备包括分组发射机。 分组发送器被配置为基于超过预定最大大小的分组将要经由通信网络发送的分组分割成多个分段，并且经由通信网络顺序发送分组。 分组发射机还被配置为响应于经由通信网络接收到的分组的每个分段的接收来构造确认分组。 确认分组包括指示是否要经由通信网络发送分组的附加分段的字段。 分组发射机还被配置为经由通信网络发送确认分组。
-
公开(公告)号：US20160119027A1
公开(公告)日：2016-04-28
申请号：US14990471
申请日：2016-01-07
Applicant: Texas Instruments Incorporated
Inventor： Kumaran Vijayasankar , Ramanuja Vedantham , IL Han Kim
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：US09276764B2
公开(公告)日：2016-03-01
申请号：US14706118
申请日：2015-05-07
Applicant: Texas Instruments Incorporated
Inventor： Kumaran Vijayasankar , Ramanuja Vedantham , Anand G. Dabak
IPC: H04L12/413 , H04B3/54 , H04L29/06
CPC classification number: H04L12/413 , H04B3/54 , H04B3/542 , H04B2203/5408 , H04B2203/5433 , H04L69/02
Abstract: Systems and methods for enhanced carrier sense multiple access (CSMA) protocols are described. In various implementations, these systems and methods may be applicable to Power Line Communications (PLC). For example, a method may include attempting to access a communications channel to transmit a frame after a backoff time proportional to a randomly generated number within a contention window (CW), the CW having an initial value carried over from a previous transmission of a different frame. Additionally or alternatively, some of techniques described herein may facilitate the spreading of the time over which devices attempt to transmit packets, thereby reducing the probability of collisions using, for example, Additive Decrease Multiplicative Increase (ADMI) mechanisms.
-
-
-
-
-
-
-
-
-
Search Results
155
records
(took 0.023 seconds)
