Cellular IP Phone(BMP)
Original Publication Date: 2002-Oct-09
Included in the Prior Art Database: 2003-Jun-21
To realize movable IP Cellular Phone with minimum delay on using Mobile IP protocol of IPv4. This invention can reduce many number of Router/Switch path against current mobile IP. According to Mobile IP on Internet protocol version 4(IPv4) , remote agent sends IP packet to Home Router. Then Home Router transfer this packet to Agent through current conected router. (Fig.1) This invention is constituted with following 3 functions. 1) Ask "available to connect to call for cellular IP phone which Home Router manages itself on demand. 2) Mobile IP Key Station is wireless LAN access point and has function of transmission after/during movement on demand.