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    • 1. 发明申请
    • Method and system for estimating average bandwidth in a communication network based on transmission control protocol
    • 基于传输控制协议估计通信网络平均带宽的方法和系统
    • US20060209838A1
    • 2006-09-21
    • US11377719
    • 2006-03-17
    • Young-Ha JungSe-Hun Hwang
    • Young-Ha JungSe-Hun Hwang
    • H04L12/56
    • H04L47/10H04L43/0852H04L43/0894
    • A method and system for estimating an average bandwidth in a wired/wireless communication network with a time-varying rate are provided. In a TCP network, differences between inter-arrival times and sequence numbers of current and previous Acks are calculated. The estimated bandwidth of the previous Ack and a sample bandwidth of the current Ack are calculated. The inter-arrival time of the current Ack is compared with the inter-arrival time of the previous Ack. A first weight to be multiplied by the estimated bandwidth of the previous Ack and a second weight to be multiplied by the sample bandwidth of the current Ack, according to the comparison, are determined. The bandwidth of the current Ack is estimated by weighting the estimated bandwidth of the previous Ack with the first weight, and weighting the sample bandwidth of the current Ack with the second weight.
    • 提供了一种用于以时变率估计有线/无线通信网络中的平均带宽的方法和系统。 在TCP网络中,计算当前和以前的Ack的到达之间时间和序列号之间的差异。 计算先前Ack的估计带宽和当前Ack的采样带宽。 将当前Ack的到达时间与之前的Ack的到达时间进行比较。 确定要乘以先前Ack的估计带宽的第一权重和要乘以当前Ack的采样带宽的第二权重,根据比较。 通过用第一权重对先前的Ack的估计带宽进行加权来估计当前Ack的带宽,并用第二权重对当前Ack的采样带宽进行加权。
    • 2. 发明申请
    • Method and apparatus for security of IP security tunnel using public key infrastructure in mobile communication network
    • 用于移动通信网络中使用公钥基础设施的IP安全隧道安全的方法和装置
    • US20060105741A1
    • 2006-05-18
    • US11281677
    • 2005-11-18
    • Dong-Wook SuhSe-Hun HwangBok-Jin Moon
    • Dong-Wook SuhSe-Hun HwangBok-Jin Moon
    • H04M3/16
    • H04M3/16H04L63/0442H04L63/0471H04L63/0823H04L63/164H04M7/006H04M2203/609H04M2207/18H04W12/001H04W12/04H04W12/06
    • A method and apparatus is provided for security of an IP security tunnel using public key infrastructure, including the steps of receiving a request message which relates to a security service requested by a mobile node, determining if there is security association (SA) for the security service and determining if there is a public key related to a peer address when the SA does not exist, sending a certificate request message to a certificate authority (CA) when the public key does not exist and receiving a certificate response message which has a certificate that includes a public key. The method further includes the steps of performing an internet key exchange and SA establishment procedure with a peer corresponding to the peer address by using the certificate, completing the internet key exchange and the SA establishment, and encrypting a packet received from the mobile node, transmitting the encrypted packet to the peer, decrypting a packet received from the peer, and transmitting the decrypted packet to the mobile node.
    • 提供了一种使用公钥基础设施的IP安全隧道的安全性的方法和装置,包括以下步骤:接收与移动节点请求的安全服务相关的请求消息,确定是否存在安全性的安全关联(SA) 服务,并且当SA不存在时确定是否存在与对等体地址相关的公共密钥,当公共密钥不存在时向证书颁发机构(CA)发送证书请求消息,并且接收到具有证书的证书响应消息 包括一个公钥。 该方法还包括以下步骤:通过使用证书,完成互联网密钥交换和SA建立,与对端地址相对应的对等体执行因特网密钥交换和SA建立过程,以及加密从移动节点接收的分组,发送 将加密的分组发送到对等体,解密从对等体接收的分组,以及将解密的分组发送到移动节点。