Patent ID: 7979586
Filing Date: 2011-07-12
Classification: H04L

Abstract:
1. An information processing system comprising: an information processor; a server; and a communication processor for performing processing on communications between said information processor and said server; said information processor including: a history packet transmitter for transmitting via a port of said communication processor a history packet as a packet for leaving a transmission history in said communication processor; a request packet transmitter for transmitting to said server, via a port different from a history port as the port of a communication processor where said history packet has passed, one or more request packets as packets for requesting transmission of a return packet as a packet to be transmitted from said server; a return packet receiver for receiving a return packet transmitted from said server via said history port; a packet transmission controller for controlling transmission of a request packet by said request packet transmitter by using a binary search method based on reception of a return packet by said return packet receiver; and a port keeping time detector for detecting the port keeping time of said communication processor based on reception of a return packet by said return packet receiver; said server including: a request packet receiver for receiving said request packet; and a return packet transmitter for transmitting said return packet to said history port upon reception of a request packet by said request packet receiver.