公开(公告)号：US06826192B2

公开(公告)日：2004-11-30

申请号：US09766001

申请日：2001-01-19

申请人： Akira Shimamura ,  Yoshihiro Uchida ,  Makoto Adachi ,  Yoshiyuki Tokoi ,  Hirotoshi Mori ,  Hajime Yamashita

发明人： Akira Shimamura ,  Yoshihiro Uchida ,  Makoto Adachi ,  Yoshiyuki Tokoi ,  Hirotoshi Mori ,  Hajime Yamashita

IPC分类号： H04L1228

CPC分类号： H04L49/3081 ,  H04J2203/0089 ,  H04L2012/5654 ,  H04Q11/0478

摘要： Disclosed is an interface apparatus in a communication network for converting a frame, which has been received from a digital transmission line and has overhead and a payload, to ATM cells, assembling a frame using ATM cells that have been received from an ATM network, and sending the assembled frame to a digital transmission line. The apparatus includes cell conversion zone specifying means for defining, as a cell conversion zone, the smallest possible portion of a frame that contains the overhead data and payload, and generating a signal that specifies the cell conversion zone; pointer creation means for creating a pointer which specifies a predetermined position of the cell conversion zone as a reference position; and cell conversion means for converting data in the cell conversion zone into cells based upon the signal that specifies the cell conversion zone, and for inserting this pointer, which indicates the reference position of the cell conversion zone, in a prescribed cell. On the ATM-cell receiving side, the apparatus detects pointers, assembles ATM cells into a frame based upon the pointers and transmits the frame.

摘要翻译： 公开了一种通信网络中的接口装置，用于将已经从数字传输线接收并且具有开销和有效载荷的帧转换到ATM信元，使用从ATM网络接收的ATM信元组装帧，以及 将组装的帧发送到数字传输线。 该装置包括：小区转换区域指定装置，用于将包含开销数据和有效载荷的帧的最小可能部分定义为小区转换区，并产生指定小区转换区的信号; 指针创建装置，用于创建指定小区转换区的预定位置作为参考位置的指针; 以及单元转换装置，用于基于指定单元转换区的信号将单元转换区中的数据转换为单元，并将用于指示单元转换区的参考位置的指针插入到规定的单元中。 在ATM信元接收侧，设备检测指针，基于指针将ATM信元组装成帧，并发送帧。