Transmission manner of the ATM electrolysis cell which minds passive optical network, the ATM communication device, the optical subscriber device and optical network device

摘要

PROBLEM TO BE SOLVED: To make uni-cast, broadcast, and multicast through an ATM-PON (asynchronous transfer mode passive optical network) without causing any security problem, increasing the traffic, nor reducing the bands assigned to each ONU(optical network unit). ;SOLUTION: An OSU 102 stores the ONU_-ID and cryptographic key of each ONU and the identification information and cryptographic key of each ELAN(emulated local area network) on a table 110 and a cryptographic key table 115. At the time of making broadcast, an ATM cell is sent to a PON by adding the purport to the cell as an ONU_-ID and, at the time of making multicast, the ATM cell is sent to the PON by adding the purport to the cell as an ONU_-ID by performing enciphering with the cryptographic key corresponding to an objective ELAN after adding the identification information of the ELAN to the ATM cell. At the time of making uni-cast, an ATM cell is sent to the PON by adding the ONU_-ID of the ONU to the cell after enciphering.;COPYRIGHT: (C)1999,JPO