公开(公告)号：US20070055877A1

公开(公告)日：2007-03-08

申请号：US10554946

申请日：2004-04-06

申请人： Joakim Persson ,  Christian Gehrmann

发明人： Joakim Persson ,  Christian Gehrmann

IPC分类号： H04L9/00

CPC分类号： H04L63/0272 ,  H04L9/0844 ,  H04L9/0891 ,  H04L63/0442 ,  H04L63/061 ,  H04L63/065 ,  H04L63/0823 ,  H04L63/083 ,  H04L67/104 ,  H04L67/1044 ,  H04L67/1065 ,  H04L2209/80 ,  H04W12/003 ,  H04W76/10 ,  H04W92/18

摘要： Disclosed is a method of establishing a secured peer-to-peer communication between two communications devices, each communications device having stored a respective set of previously established security associations with other communications devices. The method comprises determining whether the two communications devices have a common security association in their respective sets of established security associations; if the devices have determined a common security association, protecting the communications link between the two communications device based on the determined common security association; otherwise establishing a new security association between the two communications devices, and protecting the communications link based on the new security association; and extending the sets of previously established security associations of the two communications devices to the corresponding other exchanging corresponding key data.

摘要翻译： 公开了一种在两个通信设备之间建立安全的对等通信的方法，每个通信设备已经存储了与其他通信设备的先前建立的安全关联的相应集合。 该方法包括确定两个通信设备在其各自的建立的安全关联集合中是否具有公共安全关联; 如果设备已经确定了公共安全关联，则基于所确定的公共安全关联来保护两个通信设备之间的通信链路; 否则在两个通信设备之间建立新的安全关联，并且基于新的安全关联来保护通信链路; 并且将两个通信设备的先前建立的安全关联的集合扩展到相应的其他交换对应的密钥数据。

公开(公告)号：US06988197B1

公开(公告)日：2006-01-17

申请号：US09632933

申请日：2000-08-04

申请人： Joakim Persson ,  Bernard Smeets ,  Tobias Melin

发明人： Joakim Persson ,  Bernard Smeets ,  Tobias Melin

IPC分类号： H04L9/00

CPC分类号： H04L9/3273 ,  H04L2209/80

摘要： In a communication system, an authentication ciphering offset (ACO) is generated as a function of one or more parameters, wherein at least one of the one or more parameters is derived from earlier-computed values of the ACO. This enables each device to avoid generating an ACO value that is out of synchronization with a counterpart ACO value generated in another communication device.

摘要翻译： 在通信系统中，作为一个或多个参数的函数产生认证加密偏移（ACO），其中所述一个或多个参数中的至少一个是从较早计算出的ACO值导出的。 这使得每个设备避免产生与另一通信设备中生成的对应ACO值不同步的ACO值。

公开(公告)号：US06947560B1

公开(公告)日：2005-09-20

申请号：US09461766

申请日：1999-12-15

申请人： Ben Smeets ,  Mattias Hansson ,  Joakim Persson

发明人： Ben Smeets ,  Mattias Hansson ,  Joakim Persson

IPC分类号： G09C1/00 ,  H04L9/08 ,  H04L9/16

CPC分类号： G06Q20/3829 ,  H04L9/0861

摘要： The present invention includes a method and device for calculating an encryption key, K′c, for use in the initialization of an encryption algorithm. The present invention discloses a method for calculating the encryption key, K′c(x), by obtaining a ciphering key, Kc(x), determining a maximum ciphering key length, L, based on the requirements of the two devices wishing to communicate, and determining a maximum usable encryption key length, Lmax. The ciphering key, Kc(x), is then manipulated through an addition function or an exclusively-or function with a polynomial g1(x). The result is multiplied with a polynomial g2(x), which spreads the starting points of said encryption key, K′c(x). The encryption key is thus determined according to K′c(x)=g2(L)(x)[Kc(x) mod g1(L)(x)]. The method of calculating the encryption key, K′c, ensures that a maximum ciphering key length is not exceeded. In addition, the method provides new possible starting points each time a new encryption key, K′c, is generated.

摘要翻译： 本发明包括用于计算加密密钥的方法和装置，用于加密算法的初始化。 本发明公开了一种通过获得加密密钥K C（x）来计算加密密钥K'C（x）的方法，确定最大加密密钥 长度L，基于希望通信的两个设备的要求，以及确定最大可用加密密钥长度L最大值。 然后，通过加法函数或具有多项式g 1（x）的排他或函数来操纵加密密钥K（x）。 结果乘以扩展所述加密密钥K'C（x）的起始点的多项式g <2>（x）。 因此，根据K'（x）= g 2（L）（x）[K C（C））确定加密密钥 （x）mod g <1>（L）（x）]。 计算加密密钥的方法K'确保不超过最大加密密钥长度。 另外，每当生成新的加密密钥K'时，该方法提供新的可能的起始点。

公开(公告)号：US06914947B2

公开(公告)日：2005-07-05

申请号：US09795934

申请日：2001-02-28

申请人： Joakim Persson ,  Leif Wilhelmsson

发明人： Joakim Persson ,  Leif Wilhelmsson

IPC分类号： H04L1/00 ,  H04L7/00 ,  H04L7/04 ,  H04L27/06

CPC分类号： H04L1/0061 ,  H04L1/205 ,  H04L7/0083 ,  H04L7/048

摘要： A method for maintaining synchronization between a transmitter and a receiver is disclosed. The method offsets time drift which causes a degradation in the quality of communication between a transmitter and a receiver. The method comprises using a first sampling time to obtain a first sequence of hard decision symbols for decoding contents of a portion of a received packet, switching to a second sampling time upon degradation in a reliability of the symbols, and using the second sampling time to obtain a second sequence of hard decision symbols for decoding contents of a remaining portion of the received packet.

摘要翻译： 公开了一种用于维持发射机和接收机之间的同步的方法。 该方法抵消导致发射机和接收机之间通信质量下降的时间漂移​​。 该方法包括使用第一采样时间来获得用于解码接收分组的一部分的内容的硬判决符号的第一序列，在符号的可靠性劣化时切换到第二采样时间，并且使用第二采样时间 获得用于解码接收到的分组的剩余部分的内容的硬判决符号的第二序列。

公开(公告)号：US06587500B1

公开(公告)日：2003-07-01

申请号：US09453485

申请日：1999-12-17

申请人： Joakim Persson ,  Leif Wilhelmsson

发明人： Joakim Persson ,  Leif Wilhelmsson

IPC分类号： H04L2730

CPC分类号： H04L7/042

摘要： A method and apparatus for improving bit error performance within a hard decision radio interface processing environment is provided, whereby a sampling unit collects a number of samples per channel symbol of an input signal to generate a number of sampling streams, and a correlator computes a correlation value of each of the number of sampling streams with a predetermined bit sequence. The correlation values are fed into a threshold comparator which utilizes a variable threshold value to generate threshold comparator values or trigger output values. By examining a set of trigger output values, a phase decision unit determines the optimum sampling timing or sampling phase.

摘要翻译： 提供了一种用于在硬决策无线电接口处理环境中改善比特误差性能的方法和装置，由此采样单元收集每个信道符号的输入信号的数量样本以产生多个采样流，并且相关器计算相关性 具有预定比特序列的每个采样流的值。 相关值被馈送到阈值比较器，阈值比较器利用可变阈值来产生阈值比较器值或触发输出值。 通过检查一组触发输出值，相位决定单元确定最佳采样定时或采样相位。

公开(公告)号：US06421803B1

公开(公告)日：2002-07-16

申请号：US09411025

申请日：1999-10-04

申请人： Joakim Persson ,  Leif Wilhelmsson

发明人： Joakim Persson ,  Leif Wilhelmsson

IPC分类号： H03M1300

CPC分类号： H04L1/1812 ,  H04L1/1835 ,  H04L1/1874

摘要： A telecommunications system and method for performing error detection on received data packets and error correction on only those data packets that were received in error without the need for retransmission of the data packets or parity checking bits. At the transmitter, the complete data packet is divided into a number of data units (DUs). The DUs are encoded for both error detection and error correction. Both the error correction and error detection parity check bits are separately combined into one or more blocks. Thereafter, the DUs and the block(s) containing the combined parity check bits are transmitted to the receiver. If the receiver determines that a received DU does not contain any errors, the error correction parity check bits for that DU are generated and their effect on the combined error correction parity check bits removed. Thereafter, the remaining error correction parity check bits, which now only contains information about the DUs actually in error, are used to correct the erroneous DUs.

摘要翻译： 对接收到的数据分组进行错误检测的电信系统和方法，仅对那些在不需要重传数据分组或奇偶校验位的情况下错误地接收到的数据分组进行纠错。 在发射机处，完整的数据包被分成多个数据单元（DU）。 DU被编码用于错误检测和纠错。 错误校正和错误检测奇偶校验位都分别组合成一个或多个块。 此后，将DU和包含组合奇偶校验位的块发送到接收机。 如果接收机确定接收的DU不包含任何错误，则生成该DU的纠错奇偶校验位，并且它们对组合的纠错奇偶校验位的影响被去除。 此后，剩余的纠错奇偶校验位现在仅包含有关实际上错误的DU的信息，用于校正错误的DU。

公开(公告)号：US20140106915A1

公开(公告)日：2014-04-17

申请号：US14124080

申请日：2012-06-07

申请人： Michael Kistler ,  Markus Maag ,  Christoph Schiedt ,  Pär Martinsson ,  Joakim Persson ,  Michael Trevor ,  Nick Downes

发明人： Michael Kistler ,  Markus Maag ,  Christoph Schiedt ,  Pär Martinsson ,  Joakim Persson ,  Michael Trevor ,  Nick Downes

IPC分类号： F16H7/08

CPC分类号： F16H7/08 ,  B27B17/14

摘要： To facilitate the demounting of a chain (3) from a chainsaw, the saw has a lever arm preferably in the form of hinged cover (11) arranged to displace the sprocket (15) towards the guide bar (2) the other upon opening of the cover (11). Upon closing the cover (11), the sprocket (15) is displaced in the opposite direction to pre-tension the chain (3). The sprocket (15, 115) may be driven over a gear transmission (27, 127), which when the chain (3, 103) is running at ordinary cutting speed uses resulting forces to automatically tension the chain (3, 103) by displacing the sprocket (15, 115) away from the guide bar (2, 102). A ratchet mechanism (34) may be provided to maintain the chain tension upon reduction of the chain speed by preventing the sprocket (15) from moving toward the guide bar (2).Alternatively, a mechanism for automatically tensioning the chain (3, 238) of a chainsaw includes a driving inner sprocket (76, 201), and an outer ring member (77, 204) surrounding the inner sprocket (76, 201). A spring (64, 87, 228) may be provided for assisting the ratchet mechanism or as a substitute therefore.

摘要翻译： 为了便于从链锯拆卸链条（3），锯具有杠杆臂，优选地为铰接盖（11）的形式，该铰链盖（11）布置成在链条（3）打开时将链轮（15）移向导杆 盖（11）。 在关闭盖（11）时，链轮（15）沿相反方向移位以预紧链条（3）。 链轮（15,115）可以被驱动通过齿轮传动装置（27,127），当齿轮传动装置（3,103）以普通的切割速度运行时，齿轮传动装置（27,127）使用所产生的力来通过移动来自动拉紧链条（3,103） 所述链轮（15,115）远离所述导杆（2,102）。 可以设置棘轮机构（34），以通过防止链轮（15）朝向导杆（2）移动而在链条速度降低时保持链条张力。 或者，用于自动张紧链锯（2,3,238）的机构包括驱动内链轮（76,201）和围绕内链轮（76,201）的外环构件（77,204）。 可以设置弹簧（64,87,228），用于辅助棘轮机构或作为替代物。

公开(公告)号：US07949302B2

公开(公告)日：2011-05-24

申请号：US12357983

申请日：2009-01-22

申请人： Leif Wilhelmsson ,  Joakim Persson ,  Jacobus Haartsen

发明人： Leif Wilhelmsson ,  Joakim Persson ,  Jacobus Haartsen

IPC分类号： H04B7/00

CPC分类号： H04W36/30 ,  H04W36/06

摘要： A dynamic carrier selection method and system permit units operating on a first carrier to change to a second carrier when performance of the first carrier becomes unacceptable. Carrier quality measurements are taken in which carrier quality is a function of interference and multi-path fading and carrier-signal strength. The carriers are ranked according to measured quality in a carrier candidate list. The carrier candidate list is used to permit units to determine which carrier they should switch to when the carrier there currently operating on is determined to have unacceptable performance. Carrier measurements are retaken in response to a carrier change by unit or a predetermined time period having elapsed.

摘要翻译： 当第一载波的性能变得不可接受时，动态载波选择方法和系统允许在第一载波上操作以改变到第二载波的单元。 采用载波质量测量，其中载波质量是干扰和多径衰落和载波信号强度的函数。 运营商根据载波候选列表中的测量质量进行排序。 运营商候选人名单用于允许单位确定当当前运营的运营商确定具有不可接受的性能时应该切换到哪个运营商。 响应于载波改变单位或经过预定时间段来重新载波测量。

公开(公告)号：US20090176453A1

公开(公告)日：2009-07-09

申请号：US12357983

申请日：2009-01-22

申请人： Leif Wilhelmsson ,  Joakim Persson ,  Jacobus Haartsen

发明人： Leif Wilhelmsson ,  Joakim Persson ,  Jacobus Haartsen

IPC分类号： H04B7/00 ,  H04B1/00

CPC分类号： H04W36/30 ,  H04W36/06

摘要： A dynamic carrier selection method and system permit units operating on a first carrier to change to a second carrier when performance of the first carrier becomes unacceptable. Carrier quality measurements are taken in which carrier quality is a function of interference and multi-path fading and carrier-signal strength. The carriers are ranked according to measured quality in a carrier candidate list. The carrier candidate list is used to permit units to determine which carrier they should switch to when the carrier there currently operating on is determined to have unacceptable performance. Carrier measurements are retaken in response to a carrier change by unit or a predetermined time period having elapsed.

摘要翻译： 当第一载波的性能变得不可接受时，动态载波选择方法和系统允许在第一载波上操作以改变到第二载波的单元。 采用载波质量测量，其中载波质量是干扰和多径衰落和载波信号强度的函数。 运营商根据载波候选列表中的测量质量进行排序。 运营商候选人名单用于允许单位确定当当前运营的运营商确定具有不可接受的性能时应该切换到哪个运营商。 响应于载波改变单位或经过预定时间段来重新载波测量。

公开(公告)号：US20080203750A1

公开(公告)日：2008-08-28

申请号：US10567449

申请日：2004-07-06

申请人： Arnaud Premartin ,  Olivier Veuillot ,  Hans Odin ,  Joakim Persson

发明人： Arnaud Premartin ,  Olivier Veuillot ,  Hans Odin ,  Joakim Persson

IPC分类号： B60P3/07 ,  B60R9/10

CPC分类号： B60R9/06 ,  B60R9/10 ,  Y10S224/924

摘要： A load carrier for coupling to a vehicle. The load carrier includes a loading frame and a supporting arch that extends substantially upwardly from and transversely to the loading frame. The supporting arch is divisible into first and second arch parts, each of which arch parts is pivotally coupled to the loading frame such that, when divided, each of the first and second arch parts is configured to be pivoted down to a storage position lying substantially level with the loading frame. The arch parts are configured to be interlocked to each other into an in-use position, in which the first and said second arch parts substantially alone form the supporting arch.

摘要翻译： 用于联接到车辆的负载载体。 负载载体包括装载框架和从装载框架基本向上延伸并且横向于从装载框架延伸的支撑拱顶。 支撑拱可以分成第一和第二拱形部分，每个拱形部分都枢转地联接到装载框架，使得当被分割时，第一和第二拱形部分中的每一个被构造成向下枢转到基本上位于的存储位置 水平与装载框架。 拱形部分构造成彼此互锁成为使用位置，其中第一和第二拱形件基本上单独形成支撑拱。