AN ENHANCED MOBILE INTERNET PROTOCOL VERSION 6 (IPV6) WITH MULTICAST FUNCTION AND HIERARCHICAL DESIGN

摘要

THE PROPOSED HANDOVER SCHEME ACCORDING TO THE PRESENT INVENTION IS AN ENHANCEMENT OF THE EXISTING MOBILE IPv6 PROTOCOL; IT INTEGRATES HIERARCHICAL CONCEPT AND MULTICAST FUNCTION. HIERARCHICAL DESIGN WAS USED TO SHIELD THE MICRO MOBILITY FROM MACRO MOBILITY IN ORDER TO REDUCE LOCATION UPDATE SIGNAL AND SIGNALING TRAFFIC WITHIN MICRO LEVEL NETWORK. WHILE MULTICASTING IS USED TO SEND PACKETS TO MOBILE NODE (6) THROUGH BASE STATIONS (4,5) THAT ARE NEAR TO MOBILE NODE (6) . THIS WILL REDUCE HANDOVER DELAY THAT CAUSES PACKET LOST WHEN MOBILE NODE (6) IS ROAMING. (THE MOST ILLUSTRATIVE FIGURE IS FIGURE 1)