Communication quality assuring method for use in packet communication system, and packet communication apparatus with transfer delay assurance function

摘要

A packet communication apparatus using a timer for always completing the transmission of a received packet within a delay assurance time length assurable by itself. The packet communication apparatus notifies information on the delay assurance time length to a destination side packet communication apparatus, while the destination side packet communication apparatus determines a received packet buffering quantity in communication with the origination side packet communication apparatus on the basis of the information notified. This optimizes a received packet buffering quantity in the destination side packet communication apparatus in a packet communication system, thus enabling the assurance of a necessary communication quality at a low cost.