The ZigBee Alliance has announced a liaison agreement with the Fairhair Alliance, a group pushing for IPv6 in the “Internet of Buildings,” that will see the pair collaborate on standards unification in connected buildings. The move comes a week after the Thread Group announced its push into the commercial space, expanding beyond its initial smart home focus. ZigBee and Thread have a complex history, and on the face of it, this common strategic goal looks like a decent opportunity for the two groups to merge. With ZigBee offering an established low-power wireless mesh protocol, but Thread holding the marketing advantage of being the hot new thing (with the benefit of its Nest/Google/Alphabet backing), a merger like that seen with AllSeen…