公开(公告)号：US20140301409A1

公开(公告)日：2014-10-09

申请号：US14246872

申请日：2014-04-07

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Kumaran Vijayasankar ,  Ram Krishnan ,  Ramanuja Vedantham

IPC: H04L1/16 ,  H04L29/06

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：US20130301649A1

公开(公告)日：2013-11-14

申请号：US13889878

申请日：2013-05-08

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande

IPC: H04L12/413

CPC classification number: H04L12/413 ,  H04B2203/5408 ,  H04B2203/5416 ,  H04B2203/5433 ,  H04B2203/5445

Abstract: Embodiments of methods and systems for Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) with a random backoff time on a Power Line Communication (PLC) network are disclosed. The CSMA/CA method is independent of the algorithm used to update a contention window, so any contention window algorithm is supported. The PLC node runs an energy detection process first and then uses preamble detection only after energy detection is positive, or the node may run both energy detection and preamble detection simultaneously. Upon detection of a possible transmission on a PLC line due to energy detection, the PLC node will freeze a backoff counter decrementing process and will then wait for preamble detection to complete. If no energy is detected on the line, or if no preamble is detected after energy is sensed on the line, then the node will transmit is allowed by the contention window value.

Abstract translation: 公开了在电力线通信（PLC）网络上具有随机退避时间的具有冲突避免的载波侦听多路访问（CSMA / CA）的方法和系统的实施例。 CSMA / CA方法独立于用于更新争用窗口的算法，因此支持任何争用窗口算法。 PLC节点首先运行能量检测过程，然后仅在能量检测为正时才使用前导码检测，或者节点可以同时运行能量检测和前导码检测。 在检测到由于能量检测在PLC线路上发生可能的传输时，PLC节点将冻结退避计数器递减处理，然后等待前导码检测完成。 如果在线路上没有检测到能量，或者如果在线路上感测到能量之后没有检测到前导码，则通过竞争窗口值允许节点发送。

公开(公告)号：US20130279515A1

公开(公告)日：2013-10-24

申请号：US13848056

申请日：2013-03-20

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande

IPC: H04L12/70

CPC classification number: H04L12/413 ,  H04B3/542 ,  H04B2203/5433 ,  H04L12/283 ,  H04L12/40156 ,  H04L47/805 ,  H04L2012/2843

Abstract: Embodiments of methods and systems for overlapping priority contention windows in G3-PLC networks are presented. In one embodiment, a Normal Priority Contention Window (NPCW) is allowed to overlap with a High Priority Contention Window (HPCW). The minimum contention window for the normal priority frames (i.e., NPCW) is equal to or longer than the contention window for high priority frames (i.e., HPCW). By making the NPCW longer than the HPCW, the high priority frames will have a better chance than normal priority frames to get access to the channel on transmission reattempts.

Abstract translation: 介绍了在G3-PLC网络中重叠优先竞争窗口的方法和系统的实施例。 在一个实施例中，允许正常优先权竞争窗口（NPCW）与高优先权争用窗口（HPCW）重叠。 正常优先级帧（即NPCW）的最小竞争窗口等于或大于高优先级帧（即HPCW）的争用窗口。 通过使NPCW比HPCW长，高优先级帧将比正常优先级帧更有可能在传输重新尝试时访问该信道。

公开(公告)号：US20130266081A1

公开(公告)日：2013-10-10

申请号：US13859705

申请日：2013-04-09

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Tarkesh Pande ,  Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Il Han Kim

IPC: H04B3/54

CPC classification number: H04B3/54 ,  H04B2203/5408 ,  H04B2203/5416

Abstract: Embodiments of methods and systems for using both new and older modulation schemes in PLC networks—thereby supporting legacy systems—are disclosed. In one embodiment, common frames that need to be understood by all nodes to support the network will be sent two or more times using different modulation techniques. For example, all broadcast frames, such as beacon requests, beacons, and route requests may be transmitted once with differential modulation and once with coherent modulation. In one configuration, the beacons with differential modulation may be transmitted in one beacon period, and the beacons with coherent modulation may be transmitted in another beacon period. In another configuration, the differential and coherent beacons for a particular tone mask are transmitted one after the other and before any other tone mask beacon is transmitted.

Abstract translation: 公开了在PLC网络中使用新的和较旧的调制方案的方法和系统的实施例，从而支持传统系统。 在一个实施例中，需要被所有节点理解以支持网络的公共帧将使用不同的调制技术被发送两次或更多次。 例如，诸如信标请求，信标和路由请求之类的所有广播帧可以用差分调制发送一次，并且可以用相干调制一次。 在一种配置中，具有差分调制的信标可以在一个信标周期中发送，并且具有相干调制的信标可以在另一个信标周期中发送。 在另一种配置中，用于特定音调掩码的差分和相干信标一个接一个地发送，并且在任何其它音调掩码信标被发送之前传输。

公开(公告)号：US20130104117A1

公开(公告)日：2013-04-25

申请号：US13659866

申请日：2012-10-24

Applicant: Texas Instruments Incorporated

Inventor： Ramanuja Vedantham ,  Kumaran Vijayasankar ,  Ramachandran Ananthakrishnan ,  Susan Yim

IPC: G06F9/44 ,  G06F15/16

CPC classification number: G06F8/654 ,  H04B3/542 ,  H04B2203/5408

Abstract: Systems and methods for implementing data concentrated initiated multicast firmware upgrade in power line communications (PLC) are described. In an illustrative embodiment, a method performed by a PLC device may include forming a group of PLC devices to receive a transmission of a data set, the group being organized according to a hierarchical structure, transmitting the data set to the group of PLC devices, determining whether a PLC device in the lowest level of the hierarchical structure is missing one or more portions of the data set, and retransmitting at least the missing portions of the data set until the lowest level of PLC devices each have the full data set.

Abstract translation: 描述了在电力线通信（PLC）中实现数据集中发起的组播固件升级的系统和方法。 在说明性实施例中，由PLC设备执行的方法可以包括：形成一组PLC设备，以接收数据集的传输，所述数据组的传输是根据层次结构组织的，将数据集发送到PLC设备组， 确定分层结构的最低级别的PLC设备是否缺少数据集的一个或多个部分，并且至少重传数据集的缺失部分，直到最低级别的PLC设备各自具有完整数据集。