公开(公告)号：US09614579B2

公开(公告)日：2017-04-04

申请号：US14813093

申请日：2015-07-29

Applicant: Texas Instruments Incorporated

Inventor： Chao-Fang Shih ,  Ariton E. Xhafa ,  Jianwei Zhou

IPC: H04B1/7143 ,  H04B1/715

CPC classification number: H04B1/7143 ,  H04B1/715 ,  H04B2001/7154

Abstract: A device operated in a network using a channel hopping communication protocol may select a channel for each transmission by first generating and storing a sequence of pseudo-random index numbers. A list of good channels is selected from a plurality of channels. For each channel hop, one of the good channels is selected from the list of good channels for use by a transceiver in the device by using an index number selected from the sequence of pseudo-random index numbers. The list of good channels may be revised periodically and channels may be selected from the list of good channels for use by the transceiver without revising the sequence of pseudo-random index numbers.

公开(公告)号：US09614580B2

公开(公告)日：2017-04-04

申请号：US14993552

申请日：2016-01-12

Applicant: Texas Instruments Incorporated

Inventor： Chao-Fang Shih ,  Ariton E. Xhafa ,  Jianwei Zhou

IPC: H04B1/00 ,  H04B1/7143

CPC classification number: H04B1/7143

Abstract: Disclosed examples include methods and network devices for communicating in a wireless network, in which the device generates frequency hopping sequence y(j) having a prime number sequence length p, using cyclotomic classes in a field of p or using a baby-step giant-step algorithm, where y(0)=p−1 and the remaining sequence values y(j)=logα(j) mod (p−1). In certain examples, α=2 and the sequence is generated without solving logarithms using one or more algorithms to conserve memory and processing complexity for low power wireless sensors or other IEEE 802.15.4e based networks using Time-Slotted Channel Hopping (TSCH) communications.

公开(公告)号：US20170257138A1

公开(公告)日：2017-09-07

申请号：US15057155

申请日：2016-03-01

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Chao-Fang Shih ,  Ariton E. Xhafa ,  Jianwei Zhou

IPC: H04B1/713

CPC classification number: H04B1/7143

Abstract: An optimal frequency hopping sequence (FHS) is proposed. The FHSs can be generated with low computation complexity using the disclosed FHS generation mechanism. The sequence generation according to the embodiments provides a way to generate optimal FHS when channel-number is power of 2 using only 1 sequence. This gives an efficient way to generate optimal FHSs with frequent used channel-numbers for example, channel-numbers 2, 4, 8, 16, and others. These FHSs also provide good interfering probability when channel-number is not a power of 2. This makes TSCH with blacklisting more suitable for IEEE 802.15.4e networks operating in the presence of interference due to decrease in power consumption.

公开(公告)号：US20160072548A1

公开(公告)日：2016-03-10

申请号：US14813093

申请日：2015-07-29

Applicant: Texas Instruments Incorporated

Inventor： Chao-Fang Shih ,  Ariton E. Xhafa ,  Jianwei Zhou

IPC: H04B1/7143 ,  H04B1/715

CPC classification number: H04B1/7143 ,  H04B1/715 ,  H04B2001/7154

Abstract: A device operated in a network using a channel hopping communication protocol may select a channel for each transmission by first generating and storing a sequence of pseudo-random index numbers. A list of good channels is selected from a plurality of channels. For each channel hop, one of the good channels is selected from the list of good channels for use by a transceiver in the device by using an index number selected from the sequence of pseudo-random index numbers. The list of good channels may be revised periodically and channels may be selected from the list of good channels for use by the transceiver without revising the sequence of pseudo-random index numbers.

Abstract translation: 使用信道跳频通信协议在网络中操作的设备可以通过首先生成并存储伪随机索引序列序列来为每个传输选择一个信道。 从多个通道中选择好的频道列表。 对于每个信道跳，通过使用从伪随机索引序列序列中选择的索引号，从设备中的收发器使用的良好信道列表中选择一个良好信道。 可以定期修改良好频道的列表，并且可以从收发机使用的良好频道列表中选择频道，而不修改伪随机索引号序列。

公开(公告)号：US20160204827A1

公开(公告)日：2016-07-14

申请号：US14993552

申请日：2016-01-12

Applicant: Texas Instruments Incorporated

Inventor： Chao-Fang Shih ,  Ariton E. Xhafa ,  Jianwei Zhou

IPC: H04B1/7143

CPC classification number: H04B1/7143

Abstract: Disclosed examples include methods and network devices for communicating in a wireless network, in which the device generates frequency hopping sequence y(j) having a prime number sequence length p, using cyclotomic classes in a field of p or using a baby-step giant-step algorithm, where y(0)=p−1 and the remaining sequence values y(j)=logα(j) mod (p−1). In certain examples, α=2 and the sequence is generated without solving logarithms using one or more algorithms to conserve memory and processing complexity for low power wireless sensors or other IEEE 802.15.4e based networks using Time-Slotted Channel Hopping (TSCH) communications.

Abstract translation: 公开的示例包括用于在无线网络中进行通信的方法和网络设备，其中设备使用p字段中的循环类生成具有素数序列长度p的跳频序列y（j） 其中y（0）= p-1，剩余的序列值y（j）=logα（j）mod（p-1）。 在某些示例中，α= 2，并且使用一个或多个算法来生成序列而不使用一个或多个算法来节省使用时隙信道跳跃（TSCH）通信的低功率无线传感器或其他基于IEEE 802.15.4e的网络的存储器和处理复杂度。