Communication method using mobile IPv6 in NAT-PT environment and storage medium thereof
AssigneeElectronics and Telecommunications Research Institute
InventorsJoo-Chul Lee, Myung-Ki Shin, Hee-Cheol Lee, Hyoung-Jun Kim, Ki-Shic Park
Life of this patent
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Abstract
Disclosed is a communication method using the mobile IPv6 in the NAT-PT environment, and a recording medium storing the method. An NAT-PT (Network Address Translation-Protocol Translation) box as a substitute for an IPv4 node in the communication method performs an RR (Return Routability) process and a BU (Binding Update) process with an IPv6 node to allow data communication between the IPv4 node and the IPv6 node. Therefore, mobility support using the mobile IPv6 is provided in the network with the mixed IPv4 and IPv6.
Claims8
A method of an NAT-PT (Network Address Translation-Protocol Translation) box for an TPv6 node in an IPv6 network to communicate with a foreign IPv4 node in an IPv4 network, the method comprising:
- (a) allowing the NAT-PT box to receive an RR (Return Routability) request transmitted to the IPv4 node from the IPv6 node when the IPv6 node moves from a home network in the IPv6 network to another network in the IPv6, and perform an RR process which includes responding to the RR request to determine whether a changed address of the IPv6 node is a reachable address while communicating with the IPv4 node, as a substitute for the IPv4 node without allowing the IPv4 node to respond to the RR, wherein the NAT-PT box stores key conversion notice data related to the IPv4 node and generates at least one parameter and a Care-of keygen token for the RR process in response to the RR request and includes the at least one parameter and the Care-of keygen token in an outgoing message to the IPv6 node;
- (b) allowing the NAT-PT box to receive a BU (Binding Update) message transmitted to the IPv4 node from the IPv6 node, and perform a BU process as a substitute for the IPv4 node;
- and
- (c) allowing the NAT-PT box to use BU information generated when performing the BU process, and perform data communication between the IPv6 node and the IPv4 node.
A method of an NAT-PT (Network Address Translation Protocol Translation) box for an IPv6 node in an IPv6 network to communicate with a foreign IPv4 node in an IPv4 network, the method comprising:
- (a) allowing an NAT-PT box to snatch an RR (Return Routability) request transmitted to the IPv4 node from the IPv6 node when the IPv6 node moves from a home network in the IPv6 network to another network in the IPv6, and perform an RR process which includes responding to the RR request to determine whether a changed address of the IPv6 node is a reachable address while communicating with the IPv4 node, as a substitute for the IPv4 node without allowing the IPv4 node to respond to the RR request, wherein the NAT-PT box stores key conversion notice data related to the IPv4 node and generates at least one parameter and a Care-of keygen token for the RR process in response to the RR request and includes the at least one parameter and the Care-of keygen token in an outgoing message to the IPv6 node;
- (b) allowing the NAT-PT box to snatch a BU (Binding Update) message transmitted to the IPv4 node from the IPv6 node, store information on an HA (Home Address) and a COA (Care of Address) of the IPv6 node in a binding cache table, and transmit a BA (Binding Acknowledge) message to the IPv6 node;
- and
- (c) allowing the NAT-PT box to use the information on the HA and the COA of the IIPv6 node stored in the binding cache table, and perform data communication between the IPv6 node and the IPv4 node.
Dependencies are inferred from the claim text.