Mobile IPv6 route optimization in different address spaces
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorHeikki Mahkonen
Life of this patent
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Abstract
A route optimization method (300, 600) is described herein which is used by an IPv6 mobile node (402, 702) to communicate with another IPv6 node (404, 704) by transmitting and receiving IPv6 traffic within an IPv4/UDP bi-directional tunnel (407, 707) through an IP network (412, 712) without routing the IPv6 traffic through a home agent (410, 708) of the mobile node, wherein at least one of the IPv6 mobile node and the another IPv6 node is located in an IPv4 access network (406a, 406b, 716a, 718b).
Claims22
A mobile node that communicates with another node by transmitting and receiving IPv6 traffic within an IPv4/UDP bi-directional tunnel through an IP network without routing the IPv6 traffic through a home agent of the mobile node, wherein at least one of the mobile node and the another node is located in an IPv4 access network, and wherein when said another node is a correspondent node then said mobile node is operable to:
- determine if said correspondent node has an IPv4 capability;
- if yes, determine if said correspondent node can establish said IPv4/UDP tunnel;
- if yes, establish said IPv4/UDP tunnel with said correspondent node;
- and
- route said IPv6 traffic to said correspondent node within said IPv4/UDP tunnel.
A method for route optimization between a mobile node and another node, where at least one of the mobile node and the another node is located in an IPv4 access network, said method comprising the step of:
- enabling said mobile node to communicate with said another node (404, 704) by transmitting and receiving IPv6 traffic within an IPv4/UDP bi-directional tunnel through an IP network without routing the IPv6 traffic through a home agent of the mobile node, wherein said mobile node and said another node each have an IPv4 and IPv6 capability, and wherein when said another node is a correspondent node then said enabling step further includes:
- determining if said correspondent node has an IPv4 capability;
- if yes, determining if said correspondent node can establish said IPv4/UDP tunnel:
- if yes, establishing said IPv4/UDP tunnel with said correspondent node;
- and
- routing said IPv6 traffic to said correspondent node within said IPv4/UDP tunnel.
A telecommunications network characterized by:
- a mobile node;
- and
- an another node, wherein said mobile node communicates with said another node by transmitting and receiving IPv6 traffic within an IPv4 /UDP bi-directional tunnel through an IP network without routing the IPv6 traffic through a home agent of the mobile node, wherein at least one of the mobile node and the another node is located in an IPv4 access network, and wherein when said another node is a correspondent node, then said mobile node is operable to communicate with said another node by performing the following steps:
- determining if said correspondent node has an IPv4 capability;
- if yes, determining if said correspondent node can establish said IPv4/UDP tunnel;
- if yes, establishing said IPv4/UDP tunnel with said correspondent node;
- and
- routing said IPv6 traffic to said correspondent node within said IPv4/UDP tunnel.
Dependencies are inferred from the claim text.