Bulk single crystal of aluminum nitride having an areal planar defect density\u2266100 cm\u22122. A relatively large via, called a \u201cbig via,\u201d is formed on the substrate in the bonding region. In accordance with another aspect of the invention, primal-dual interior point methods can be applied to take advantage of the resulting special structure. If all the significance states are determined to be zero, then run length coding is performed. In one embodiment, the condition also includes a WITHIN element which filters out events received outside of a pre-specified time period. The method includes receiving at the home agent node an IPv6 care-of address, determining that the IPv6 care-of address belongs to the foreign network and that the foreign NAT64 node has a prefix to to generate virtual IPv6 addresses and sending a prefix binding request message to a home NAT64 node to bind the prefix to the home address of the mobile node for translation between IPv6 and IPv4.