Disclosed is a method for interworking between an ACR and a PDE in a position recognition system based on a portable Internet and a system therefor. A scheme for TCP/IP-based socket connection between the PDE and the ACR is defined. A data packet transmitted and received between the PDE and the ACR is...http://www.google.com.hk/patents/US7957281?utm_source=gb-gplus-share專利 US7957281 - Method for interworking between access control router and position determination entity in position recognition system based on portable internet and system therefor
