British Telecommunications Corporation

British Telecommunications Public Limited Company

John Patterson

John R King

Peter Hovell

John Robert King

An address resolver system that assists a node in an IPv6 network to select an address for connectivity with a node in an IPv4 network when both DSTM and NAT-PT transition mechanisms are available. Native connectivity can be achieved by preferring an encapsulation or tunnelling mechanism such as DSTM where possible over a translation mechanism such as NAT-PT. A range of encapsulation and translation mechanisms are envisaged. The resolver determines capabilities of the node and of the application that requires the address in order to make the selection.

System for selecting a connectivity mechanism

An interface for use between two IPv6 domains separated by an IPv4 domain includes a protocol converter, an encapsulator/un-encapsulator and a controller.

Packet network interfacing

A tunnel is established across an IPv4 domain for the transport of packets from a source host on one IPv6 domain to a destination host on another IPv6 domain, there being respective interfaces between the IPv4 domain and the IPv6 domains.

Growing community of inventors

Ipswich, United Kingdom

John Patterson