A communication device on a time equivalence assurance network that guarantees the receiving sequence of packets sent to all users so that even if a user session is re-sent, a function operates to alleviate the resultant effects and make the send and receive timing approach the initial timing. An edge communication device on a provider network identifies the sessions of each user subscriber terminal, and stores and monitors the time information attached by a sequence information attachment function. Even if a packet is resent, the packet will at this time be resent with attached sequence information based on the past time originally attached to the packet, and not sequence information based on the current resending time.