公开(公告)号：US20130343404A1

公开(公告)日：2013-12-26

申请号：US13923097

申请日：2013-06-20

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande

IPC: H04B3/54

CPC classification number: H04B3/544 ,  H04B2203/5408 ,  H04B2203/5433 ,  H04B2203/5445 ,  H04L12/413

Abstract: Systems and methods for setting a Network Allocation Vector (NAV) in a PLC node are disclosed. In a PLC standard, coexistence is achieved by having the nodes detect a common preamble and backing off by a Coexistence InterFrame Space (cEIFS) time period to help the node to avoid interfering with the other technologies. In one embodiment, a PHY primitive is sent from the PHY to the MAC know that there has been a preamble detection. A two-level indication may be used—one indication after receiving the preamble and other indication after decoding the entire frame. The MAC sets NAV to EIFS if a native preamble is detected. The MAC sets NAV to cEIFS if only a coexistence preamble is detected or if a non-native preamble is detected.

Abstract translation: 公布了在PLC节点中设置网络分配向量（NAV）的系统和方法。 在PLC标准中，通过使节点检测到公共前同步码并通过共存帧间空间（cEIFS）时间段进行后退来实现共存，以帮助节点避免干扰其他技术。 在一个实施例中，PHY原语从PHY发送到MAC，知道已经有前导码检测。 可以使用两级指示 - 在解码整个帧之后接收到前导码和其他指示之后的一个指示。 如果检测到本机前导码，则MAC将NAV设置为EIFS。 如果仅检测到共存前导码或者是否检测到非本地前导码，则MAC将NAV设置为cEIFS。

公开(公告)号：US20130294531A1

公开(公告)日：2013-11-07

申请号：US13659870

申请日：2012-10-24

Applicant: Texas Instruments Incorporated

Inventor： Ramanuja Vedantham ,  Anand Dabak ,  Tarkesh Pande

IPC: H04B3/54

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 detecting a communication from foreign PLC device on a PLC network in response to a foreign preamble received by the PLC device, terminating transmissions to the PLC network for a network-specific co-existence Extended Interframe Space (cEIFS) time period in response to the foreign preamble, and resuming transmissions to the PLC network after expiration of the network-specific time period.

公开(公告)号：US20130254615A1

公开(公告)日：2013-09-26

申请号：US13848054

申请日：2013-03-20

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Kumaran Vijayasankar ,  Tarkesh Pande ,  Ramanuja Vedantham

IPC: H04L12/70 ,  H04L1/08 ,  H03M13/09

CPC classification number: H04L1/005 ,  G06F11/1004 ,  H03M13/09 ,  H03M13/1515 ,  H04B3/542 ,  H04B3/544 ,  H04B2203/5408 ,  H04L1/0057 ,  H04L1/0061 ,  H04L1/0071 ,  H04L1/08 ,  H04L1/1607 ,  H04L47/10

Abstract: Embodiments of methods and systems are presented for generating PHY frames with multiple Reed-Solomon encoded blocks in PLC networks. In one embodiment, a MAC layer divides a data frame from a higher level into data blocks. The MAC layer may add a MAC header and/or an error-detection code to each data block. The MAC layer then passes the data blocks to a PHY layer to be individually Reed-Solomon encoded and combined into a single PHY frame for transmission on a PLC network. In other embodiments, the MAC layer passes a single data frame to the PHY layer, which divides the MAC data frame into segments to be individually Reed-Solomon encoded. The individual Reed-Solomon encoded segments are combined into a single PHY frame for transmission on a PLC network.

Abstract translation: 提出了用于在PLC网络中生成具有多个Reed-Solomon编码块的PHY帧的方法和系统的实施例。 在一个实施例中，MAC层将数据帧从较高级划分成数据块。 MAC层可以向每个数据块添加MAC报头和/或错误检测码。 然后，MAC层将数据块传送到PHY层，以单独进行Reed-Solomon编码并组合成单个PHY帧，以在PLC网络上传输。 在其他实施例中，MAC层将单个数据帧传递到PHY层，该PHY层将MAC数据帧划分成单独的Reed-Solomon编码的段。 单独的Reed-Solomon编码段被组合成单个PHY帧以在PLC网络上传输。