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    • 67. 发明授权
    • Error correction apparatus and method
    • 纠错装置及方法
    • US5898708A
    • 1999-04-27
    • US491257
    • 1995-06-16
    • Toru TateishiKatsumi MuranoTakayasu AokiHiroaki Sato
    • Toru TateishiKatsumi MuranoTakayasu AokiHiroaki Sato
    • G06F11/10H03M13/00H03M13/15H03M13/47H04L1/00
    • H03M13/151H03M13/47
    • When a receiver unit receives second data composed of check bits and first data obtained by encoding information bits indicating the communication contents by way of a first generator matrix based on a first generating polynomial, and then further encoding the first data by way of a second generator matrix of an irreducible standard form based on a second generating polynomial, an error location detector decodes the second data received by way of a second check matrix that is orthogonal to the second generator matrix so as to detect errors produced in the first data. A dummy syndrome generator generates a dummy syndrome of the error produced in the information bits based on the detected error location and on the first generating polynomial. A syndrome generator takes the product of the data obtained by excluding the check bits from the second data received by the receiver unit and the first check matrix that is orthogonal to the first generator matrix so as to generate a syndrome that indicates the error syndrome produced in the information bits. Finally, an error corrector corrects errors produced in the information bits if the dummy syndrome generated by the dummy syndrome generator is the same as the syndrome generated by the syndrome generator.
    • 当接收机单元接收由校验位组成的第二数据和通过基于第一生成多项式通过第一生成矩阵编码指示通信内容的信息比特而获得的第一数据,然后通过第二生成器对第一数据进行编码 基于第二生成多项式的不可约标准形式的矩阵,误差位置检测器通过与第二生成矩阵正交的第二校验矩阵来接收的第二数据进行解码,以便检测在第一数据中产生的错误。 虚拟综合征发生器基于检测到的误差位置和第一生成多项式产生在信息比特中产生的误差的虚拟综合征。 校正子发生器通过从由接收器单元接收的第二数据和与第一生成器矩阵正交的第一校验矩阵排除校验位而获得的数据的乘积,以产生指示在 信息位。 最后,如果由虚拟综合征发生器产生的虚拟综合征与综合征发生器产生的综合征相同,则误差校正器校正信息位中产生的误差。
    • 68. 发明授权
    • Mobile communication system with access function to computer network
    • 具有访问功能的移动通信系统到计算机网络
    • US5983090A
    • 1999-11-09
    • US829938
    • 1997-04-01
    • Takayasu Aoki
    • Takayasu Aoki
    • H04W8/26H04Q7/38
    • H04W8/26
    • In a mobile communication system, when a mobile station (PS1 to PSj) makes a request for connection to a service provider (SP), a base station (BS1 to BSn) acquires an IP address "IP1" assigned for the base stations and assigns to the requesting mobile station an IP address "IP2" for the mobile stations that has been acquired in advance in place of the IP address "IP1". When data transfer is started, the base station changes the source address in data sent by the mobile station from "IP2" to "IP1" and then transfers the resulting data to the service provider. On the other hand, the base station changes the destination address of data sent by the service provider from "IP1" for the base stations to "IP2" for the mobile stations for subsequent transfer to the mobile station.
    • 在移动通信系统中,当移动台(PS1〜PSj)作出与服务提供商(SP)的连接的请求时,基站(BS1〜BSn)获取分配给基站的IP地址“IP1” 向提出请求的移动台发送用于代替IP地址“IP1”而事先获取的移动台的IP地址“IP2”。 当数据传输开始时,基站将移动台发送的数据中的源地址从“IP2”更改为“IP1”,然后将结果数据传送到服务提供商。 另一方面,基站将用于基站的数据“IP1”的服务提供商发送的数据的目的地地址更改为移动站的后续传送到移动站的“IP2”。