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    • 12. 发明申请
    • Method for providing message transmission in H.323 communication system
    • 在H.323通信系统中提供消息传输的方法
    • US20070074022A1
    • 2007-03-29
    • US11491006
    • 2006-07-21
    • Qi WangXiaosong LeiChaohui MaHaifeng WangBo WuHaiyang LiuQin Zhang
    • Qi WangXiaosong LeiChaohui MaHaifeng WangBo WuHaiyang LiuQin Zhang
    • H04L9/00
    • H04L63/061H04L29/06027H04L63/08H04L63/0884H04L65/1009H04M7/0078
    • The present invention provides a method for providing message transmission in H.323 communication system. The method includes: the first endpoint and second endpoint confirming authentication information through a GK; according to said authentication information, the first endpoint and second endpoint exchanging message directly. Since H.235 protocol of ITU-T describes the authentication and privacy technique used in H.323 systems and provides security service for message transmission in GK-routed model, the present invention can guarantee the security of the authentication information. The functions of middle entities need not to be modified for applying the method provided by the present invention because Diffie-Hellman key exchange technology is adopted in this method. The present invention increases the network scalability of the symmetric key system by adopting negotiation mode. The present invention designates and improves the security framework of message transmission in direct-routed model of H.323 system, thereby improving the security of H.323 system.
    • 本发明提供了一种在H.323通信系统中提供消息传输的方法。 该方法包括:第一端点和第二端点通过GK确认认证信息; 根据所述验证信息,第一端点和第二端点直接交换消息。 由于ITU-T的H.235协议描述了H.323系统中使用的认证和隐私技术,并为GK路由模型中的消息传输提供安全服务,本发明可以保证认证信息的安全性。 由于本方法采用Diffie-Hellman密钥交换技术,中间实体的功能不需要修改,适用于本发明提供的方法。 本发明通过采用协商模式提高对称密钥系统的网络可扩展性。 本发明指定并改进了H.323系统直接路由模型中消息传输的安全框架,从而提高了H.323系统的安全性。
    • 16. 发明授权
    • Apparatus and method for interferometric frequency modulation to exploit cooperative interference in wireless communications
    • 用于干扰频率调制的装置和方法,以利用无线通信中的协作干扰
    • US08351871B2
    • 2013-01-08
    • US12428852
    • 2009-04-23
    • Haiyang LiuHenrik Holm
    • Haiyang LiuHenrik Holm
    • H04B1/66
    • H04L27/233
    • A method includes receiving a first wireless signal and demodulating data in the first wireless signal using a first demodulation technique. The method also includes receiving multiple second wireless signals simultaneously (where the second wireless signals interfere to produce an interfered signal) and demodulating data in the interfered signal using a second demodulation technique. The method could also include (i) determining that a single transmitter transmitted the first wireless signal and selecting the first demodulation technique in response and (ii) determining that multiple transmitters transmitted the second wireless signals and selecting the second demodulation technique in response. Determining that the single transmitter transmitted the first wireless signal could include determining that a fundamental frequency of the first wireless signal is below a threshold. Determining that the multiple transmitters transmitted the second wireless signals could include determining that a fundamental frequency of the interfered signal is above the threshold.
    • 一种方法包括使用第一解调技术接收第一无线信号和解调第一无线信号中的数据。 该方法还包括同时接收多个第二无线信号(其中第二无线信号干扰产生干扰信号)和使用第二解调技术解调干扰信号中的数据。 该方法还可以包括(i)确定单个发射机发送第一无线信号并响应于选择第一解调技术,以及(ii)确定多个发射机发射第二无线信号并响应选择第二解调技术。 确定发射第一无线信号的单个发射机可以包括确定第一无线信号的基频低于阈值。 确定发射第二无线信号的多个发射机可以包括确定干扰信号的基频高于阈值。
    • 17. 发明授权
    • Apparatus and method for medium access control in wireless communication networks
    • 无线通信网络中媒体接入控制的装置和方法
    • US07995526B2
    • 2011-08-09
    • US12107928
    • 2008-04-23
    • Haiyang LiuRamakrishna Budampati
    • Haiyang LiuRamakrishna Budampati
    • H04W72/00H04W16/14
    • H04W72/02H04W72/0406
    • A method includes identifying a white space at a first wireless node and selecting a channel in the identified white space. The white space includes at least one frequency or frequency band not in use (like a licensed frequency or frequency band). The method also includes identifying at the first wireless node a channel access factor for each of multiple wireless nodes including the first wireless node. The method further includes determining if the first wireless node has a specified channel access factor. In addition, the method includes transmitting data from the first wireless node on the channel when the first wireless node has the specified channel access factor. The channel access factors can be identified and the determination whether the first wireless node has the specified channel access factor can be performed without using control signals transmitted between the wireless nodes. The channel access factor could represent a hash function value.
    • 一种方法包括识别第一无线节点处的白色空间并选择所识别的空白区域中的信道。 白色空间包括至少一个未使用的频率或频带(如许可频率或频带)。 该方法还包括在第一无线节点处识别包括第一无线节点的多个无线节点中的每一个的信道接入因子。 该方法还包括确定第一无线节点是否具有指定的信道接入因子。 此外,该方法包括当第一无线节点具有指定的信道接入因子时,在信道上从第一无线节点发送数据。 可以识别信道接入因子,并且可以在不使用在无线节点之间传输的控制信号的情况下执行确定第一无线节点是否具有指定的信道接入因子。 通道访问因子可以表示散列函数值。
    • 19. 发明申请
    • APPARATUS AND METHOD FOR INTERFEROMETRIC FREQUENCY MODULATION TO EXPLOIT COOPERATIVE INTERFERENCE IN WIRELESS COMMUNICATIONS
    • 用于在无线通信中开展合作干扰的干扰频率调制的装置和方法
    • US20100272090A1
    • 2010-10-28
    • US12428852
    • 2009-04-23
    • Haiyang LiuHenrik Holm
    • Haiyang LiuHenrik Holm
    • H04J1/00
    • H04L27/233
    • A method includes receiving a first wireless signal and demodulating data in the first wireless signal using a first demodulation technique. The method also includes receiving multiple second wireless signals simultaneously (where the second wireless signals interfere to produce an interfered signal) and demodulating data in the interfered signal using a second demodulation technique. The method could also include (i) determining that a single transmitter transmitted the first wireless signal and selecting the first demodulation technique in response and (ii) determining that multiple transmitters transmitted the second wireless signals and selecting the second demodulation technique in response. Determining that the single transmitter transmitted the first wireless signal could include determining that a fundamental frequency of the first wireless signal is below a threshold. Determining that the multiple transmitters transmitted the second wireless signals could include determining that a fundamental frequency of the interfered signal is above the threshold.
    • 一种方法包括使用第一解调技术接收第一无线信号和解调第一无线信号中的数据。 该方法还包括同时接收多个第二无线信号(其中第二无线信号干扰产生干扰信号)和使用第二解调技术解调干扰信号中的数据。 该方法还可以包括(i)确定单个发射机发送第一无线信号并响应于选择第一解调技术,以及(ii)确定多个发射机发射第二无线信号并响应选择第二解调技术。 确定发射第一无线信号的单个发射机可以包括确定第一无线信号的基频低于阈值。 确定发射第二无线信号的多个发射机可以包括确定干扰信号的基频高于阈值。