Method for Generating Private Keys in Wireless Networks
    1.
    发明申请
    Method for Generating Private Keys in Wireless Networks 有权
    在无线网络中生成私钥的方法

    公开(公告)号:US20120140922A1

    公开(公告)日:2012-06-07

    申请号:US12962449

    申请日:2010-12-07

    IPC分类号: H04W12/04

    摘要: The first and second nodes in a wireless network estimate first and second channel response. The first node quantizes the first channel response to produce a first bit sequence, and a feed-forward message, which is transmit as a feed-forward message to the second node. The second node quantizes the second channel response using the feed-forward message to produce and an estimate of the first bit sequence, a second bit sequence and a feed-back message, which is transmitted to the first node. Then, the first and second nodes delete bits in the respective bit sequences using the feed-back and feed-forward message to generate first and second private keys with low bit mismatch rate.

    摘要翻译: 无线网络中的第一和第二节点估计第一和第二信道响应。 第一节点量化第一信道响应以产生第一比特序列,以及作为前馈消息作为第二节点发送的前馈消息。 第二节点使用前馈消息量化第二信道响应,以产生第一比特序列,第二比特序列和反馈消息的估计,其被发送到第一节点。 然后,第一和第二节点使用反馈和前馈消息删除各个比特序列中的比特,以产生具有低比特失配率的第一和第二私钥。

    Method for generating private keys in wireless networks
    2.
    发明授权
    Method for generating private keys in wireless networks 有权
    在无线网络中生成私钥的方法

    公开(公告)号:US08483387B2

    公开(公告)日:2013-07-09

    申请号:US12962449

    申请日:2010-12-07

    IPC分类号: H04L29/06

    摘要: The first and second nodes in a wireless network estimate first and second channel response. The first node quantizes the first channel response to produce a first bit sequence, and a feed-forward message, which is transmit as a feed-forward message to the second node. The second node quantizes the second channel response using the feed-forward message to produce and an estimate of the first bit sequence, a second bit sequence and a feed-back message, which is transmitted to the first node. Then, the first and second nodes delete bits in the respective bit sequences using the feed-back and feed-forward message to generate first and second private keys with low bit mismatch rate.

    摘要翻译: 无线网络中的第一和第二节点估计第一和第二信道响应。 第一节点量化第一信道响应以产生第一比特序列,以及作为前馈消息作为第二节点发送的前馈消息。 第二节点使用前馈消息量化第二信道响应,以产生第一比特序列,第二比特序列和反馈消息的估计,其被发送到第一节点。 然后,第一和第二节点使用反馈和前馈消息删除各个比特序列中的比特,以产生具有低比特失配率的第一和第二私钥。

    Secure Wireless Communication Using Rate-Adaptive Codes
    4.
    发明申请
    Secure Wireless Communication Using Rate-Adaptive Codes 有权
    使用速率自适应代码的安全无线通信

    公开(公告)号:US20120148046A1

    公开(公告)日:2012-06-14

    申请号:US12965580

    申请日:2010-12-10

    IPC分类号: H04K1/00

    摘要: Data are communicated in a wireless network between a transmitter to a receiver. The transmitter estimates a first channel response between the receiver and the transmitter at the transmitter, and generating a first key based on the first channel response. The data are encoded at the transmitter using a rate-adaptive code to produce encoded data, which is scrambling using the first key before broadcasting. Subsequently, the receiver can estimate a second channel response to generate a second key to be used to descramble the broadcast data.

    摘要翻译: 数据在发射机到接收机之间的无线网络中通信。 发射机估计在发射机处的接收机和发射机之间的第一信道响应,并且基于第一信道响应产生第一密钥。 数据在发射机处使用速率自适应码进行编码,以产生编码数据,编码数据在广播之前使用第一个密钥加扰。 随后,接收机可以估计第二信道响应以产生要用于解扰广播数据的第二密钥。

    Method for Minimizing Undetectable Errors in Data Packets in Communication Systems
    6.
    发明申请
    Method for Minimizing Undetectable Errors in Data Packets in Communication Systems 失效
    最小化通信系统中数据包中不可检测错误的方法

    公开(公告)号:US20120207027A1

    公开(公告)日:2012-08-16

    申请号:US13026336

    申请日:2011-02-14

    IPC分类号: H04L12/26

    摘要: Undetectable errors in packets are minimized by verifying the CRC in each packet, setting a CRC flag to 0 to indicate success, and setting the CRC flag to 1 to indicate failure. If at least one packet in the set of packets fails then generate an error pattern E for each packet by comparing the packet that fails with one packet that passed the CRC verification, and comparing the error pattern to a set of known error patterns. Then, setting a CRC flag to 0 to indicate success and passing the payload of each packet and the CRC flag to the application if the difference is less than a predetermined threshold, and otherwise, setting the CRC flag to 1 to indicate failure.

    摘要翻译: 通过验证每个分组中的CRC,将CRC标志设置为0以指示成功,并将CRC标志设置为1以指示故障,使分组中的不可检测的错误最小化。 如果该组数据包中的至少一个数据包失败,则通过将失败的数据包与通过CRC验证的一个数据包进行比较,并将错误模式与一组已知错误模式进行比较,为每个数据包生成错误模式E. 然后,如果差小于预定阈值,则将CRC标志设置为0以指示成功并将每个分组的有效载荷和CRC标志传递给应用,否则将CRC标志设置为1以指示故障。

    Method for minimizing undetectable errors in data packets in communication systems
    7.
    发明授权
    Method for minimizing undetectable errors in data packets in communication systems 失效
    减少通信系统中数据包不可检测误差的方法

    公开(公告)号:US08537689B2

    公开(公告)日:2013-09-17

    申请号:US13026336

    申请日:2011-02-14

    IPC分类号: H04J1/16

    摘要: Undetectable errors in packets are minimized by verifying the CRC in each packet, setting a CRC flag to 0 to indicate success, and setting the CRC flag to 1 to indicate failure. If at least one packet in the set of packets fails then generate an error pattern E for each packet by comparing the packet that fails with one packet that passed the CRC verification, and comparing the error pattern to a set of known error patterns. Then, setting a CRC flag to 0 to indicate success and passing the payload of each packet and the CRC flag to the application if the difference is less than a predetermined threshold, and otherwise, setting the CRC flag to 1 to indicate failure.

    摘要翻译: 通过验证每个分组中的CRC,将CRC标志设置为0以指示成功,并将CRC标志设置为1以指示故障,使分组中的不可检测的错误最小化。 如果该组数据包中的至少一个数据包失败,则通过将失败的数据包与通过CRC验证的一个数据包进行比较,并将错误模式与一组已知错误模式进行比较,为每个数据包生成错误模式E. 然后,如果差小于预定阈值,则将CRC标志设置为0以指示成功并将每个分组的有效载荷和CRC标志传递给应用,否则将CRC标志设置为1以指示故障。

    Method for scheduling data transmission in hybrid communication networks for transportation safety systems
    8.
    发明授权
    Method for scheduling data transmission in hybrid communication networks for transportation safety systems 有权
    运输安全系统混合通信网络中数据传输调度方法

    公开(公告)号:US08565214B2

    公开(公告)日:2013-10-22

    申请号:US12979777

    申请日:2010-12-28

    IPC分类号: H04W4/00

    CPC分类号: H04W72/1242

    摘要: A hybrid communication network for a transportation safety system includes a fixed wired nodes and mobile wireless nodes. Because the wired nodes operate independently packets transmitted by the wired nodes to the wireless nodes need to be synchronized. A downlink travel time for downlink packets traveling from a controller to the wireless nodes is determined. Then, the controller schedules downlink data intervals (DDI) based on the downlink travel time; and transmits downlink packets to the wireless nodes during the DDI, such that a latency requirement of the transportation safety system is satisfied.

    摘要翻译: 用于运输安全系统的混合通信网络包括固定有线节点和移动无线节点。 由于有线节点独立运行,有线节点传输到无线节点的数据包需要同步。 确定从控制器到无线节点的下行链路分组的下行链路行进时间。 然后,控制器基于下行链路行进时间调度下行链路数据间隔(DDI); 并且在DDI期间向无线节点发送下行链路分组,使得满足运输安全系统的等待时间要求。

    Carrier allocation and time sharing for OFDMA/TDMA networks
    9.
    发明授权
    Carrier allocation and time sharing for OFDMA/TDMA networks 有权
    OFDMA / TDMA网络的载波分配和时间共享

    公开(公告)号:US08472304B2

    公开(公告)日:2013-06-25

    申请号:US12503169

    申请日:2009-07-15

    IPC分类号: H04J11/00

    摘要: A method allocates bandwidth to channels in an orthogonal frequency division multiple access and time division multiple access (TDMA) network. The network includes a master device (master) communicating with a set of slave devices (slaves). The master defines a set Ψm of logical indices ν of a set of N physical subcarriers for a set of M data streams to be allocated to a set of Nd logical data subcarriers according to Ψm={ν|ν=iM+m, i=0,1,2, . . . , d−1}, where d=Nd/M. The set of N data subcarriers is mapped to the set of Nd logical subcarriers according to the logical indices, and the data subcarriers are allocated to the logical subcarriers.

    摘要翻译: 一种方法为正交频分多址和时分多址(TDMA)网络中的信道分配带宽。 网络包括与一组从设备(从站)通信的主设备(主设备)。 主器件根据Psim = {nu | nu = iM + m,i = 1,...,n)定义要分配给一组Nd逻辑数据子载波的一组M个数据流的N个物理子载波的逻辑索引nu的集合Psim, 0,1,2,。 。 。 ,d-1},其中d = Nd / M。 N组数据子载波根据逻辑索引映射到一组Nd逻辑子载波,并将数据副载波分配给逻辑子载波。

    SNR-based blanking scheme for impulsive noise mitigation in wireless networks
    10.
    发明授权
    SNR-based blanking scheme for impulsive noise mitigation in wireless networks 失效
    用于无线网络中脉冲噪声抑制的基于SNR的消隐方案

    公开(公告)号:US08451956B2

    公开(公告)日:2013-05-28

    申请号:US12650410

    申请日:2009-12-30

    IPC分类号: H04B1/10

    摘要: A blanking scheme for mitigating impulsive noise in wireless networks is based on the signal-to-noise ratio (SNR) of symbols. To fully gain the benefits of the SNR-based blanking scheme, two methods are developed, namely a multi-level thresholding scheme in the time-, spatial- and frequency-domains, and a weighted-input error-correction decoding. The symbols are conditioned as a function of the estimated SNR in time-, frequency-, or spatial-domains or combinations therefore, and the conditioning is applied to an amplitude, phase, or energy level, or combinations thereof.

    摘要翻译: 用于减轻无线网络中的脉冲噪声的消隐方案是基于符号的信噪比(SNR)。 为了充分获得基于SNR的消隐方案的优点,开发了两种方法,即时域,空间和频域中的多级阈值方案和加权输入纠错解码。 符号在时间,频率或空间域或组合中作为估计的SNR的函数进行调节,并且将调节应用于幅度,相位或能级或其组合。