Communication device and logical link abnormality detection method

A logical link abnormality detection method executed by a communication device transferring and receiving data via a plurality of logical links, comprising the steps of:

• segmenting transmission data as being associated with each of the plurality of logical links;
• transmitting the segmented transmission data via one of the plurality of logical links associated with this segmented transmission data;
• receiving data via each of the plurality of logical links;
• and
• judging, within a predetermined period of time since the data were received via any one of the plurality of logical links, if the data are not received via at least one of the remaining ones of the plurality of the logical links, the at least one of the remaining ones of the plurality of logical link to be an abnormal logical link.

An SCTP communication device transferring and receiving data to and from a opposite communication device by use of SCTP (Stream Control Transmission Protocol), comprising:

• a link configuring unit configuring a plurality of associations between said SCTP communication device itself and the opposite communication device;
• a segmenting unit segmenting transmission data as being associated with each of the plurality of associations;
• and
• a transmission unit transmitting the segmented transmission data via one of the plurality of associations associated with this segmented transmission data.