Data transmission/reception apparatus and method for inserting and extracting maintenance management data
A data transmission/reception apparatus including a network layer device section for performing a process corresponding to a physical layer of an OSI reference model is provided. The apparatus includes a maintenance management data insertion/extraction section for inserting maintenance management data into data to be transmitted, transmitting the data to be transmitted, and extracting the maintenance management data from received data, wherein the maintenance management data insertion/extraction section performs the insertion and extraction of the maintenance management data with respect to the network layer device section.
1. A data transmission/reception apparatus connected to a network in which data is transmitted and received, comprising:
a network layer device section for performing a process corresponding to a physical layer;
a maintenance management data insertion/extraction section for inserting maintenance management data into data to be transmitted, transmitting the data to be transmitted, and extracting maintenance management data from received data;
an inserted data identification section for identifying whether the data inserted in frame format is the maintenance management data or user data by using information on the maintenance management data in a start field delimiter field of a frame, the frame including the start field delimiter field and a preamble field other than a network layer 2 frame of the frame; and
a set value extension determination section for determining whether a set value of an existing field in the frame format is an extended value, wherein
the maintenance management data insertion/extraction section performs insertion and extraction of the maintenance management data with respect to the network layer device section, in a frame format of data processed in the network layer device section, the maintenance management data or user data is inserted into a prescribed field therein, and
when it is determined that the set value is not the extended value by the set value extension determination section, the maintenance management data insertion/extraction section inserts and extracts the maintenance management data in another network layer device section corresponding to a data link layer.