Showing papers by "Takeshi Kubo published in 2004"

Mobile network and communication method thereof

Abstract: It is possible to improve data transmission rate of a mobile network. A gateway GW and a plurality of foreign agents FA are connected in a ring shape. There is provided a communication method including: a step (1) of receiving, by the GW, an IP packet destined to a mobile terminal MNa from a partner terminal CN; a step (2) of transmitting, by the GW, the received packet to a link L1 of one side; a step (3) of transmitting, by the FA1, the received packet to a link L2 of one side; a step (4) of transmitting, by the FA1, the received packet further to a link L4 to which MNa is connected if the received packet has a destination address already registered in a visitor list; a step (5) of transmitting, by the FA2, the received packet to a link L3 of one side; a step (6) of terminating the process, by the FA2, if the received packet has a destination address not registered in the visitor list; and a step (7) of discarding, by the GW, the received packet.

Mobile network and its data communication method

Abstract: PROBLEM TO BE SOLVED: To provide a mobile network capable of completing position registration in a destination FA of a mobile terminal in a short period, and to provide its data communication method. SOLUTION: The communication method includes a step in which a destination FA2 recognizes the MAC address of a mobile terminal MN; a step in which the destination FA2 registers the MAC address of the MN in a FHReq message; a step in which the destination FA2 sends the FHReq onto a transfer network; a step in which each FA receives the FHReq, registers, if the MAC address has been registered in its position management list; an IP address corresponding to the MAC address in the FHReq and sends it to the transfer network; a step in which the destination FA2 receives the FHReq and temporarily registers the MAC address and the IP address in its position management list; and a step in which the data sent from an HA to the MN is transferred to the MN, based on the temporarily registered information. COPYRIGHT: (C)2005,JPO&NCIPI

Metro mobile ring for high-speed and scalable micro-mobility management

Abstract: With the growing popularity of WiFi, more businesses and service providers are setting up wireless access points that allow people on the move to access broadband Internet access services as if they were at home or at the office. In this paper, we propose a new micro-mobility management that is designed to cover the size of a metropolitan area. This architecture connects multiple local mobility agents on a flat ring to decentralize the location information of the visiting mobile nodes. Unlike the existing L2 rings such as the token ring, the L3 address of an incoming packet is directly examined for delivery to the destination node. The author implements the proposed method and have shown each performance in various numbers of mobile nodes by measuring the throughput and latency. The author compared the proposed method with the hierarchical network and discussed its advantages in a large-scale network that accommodates tens of thousands of mobile users.