Virtual addresses and their use?

RE: Virtual addresses and their use?

Eirik Midttun — Thu, 14 Dec 2017 23:26:50 GMT

The Label UUID is used as additional data for the MIC, so when a message sent to a virtual address (hash) is received it is checked against all registered Label UUIDs for authentication.

RE: Virtual addresses and their use?

SørenHN — Thu, 14 Dec 2017 15:30:21 GMT

If I understand you correctly, Virtual Addresses are just another kind of Group Address but with many more address available?

What will happen if to UUID's will have the same hash? Will the network think the two nodes with the same address hashes is the same device or are there some built in process for handling this situation?

RE: Virtual addresses and their use?

Eirik Midttun — Thu, 14 Dec 2017 13:04:21 GMT

Good question; the confusion is understandable.

You are right about the Group Addresses. In addition to the 16k addresses that are classified as a group address there is an extension mechanism called Label UUID. A virtual address is a hash of the Label UUID. It means that a virtual address can correspond to many Label UUIDs, but in reality this is unlikely. And it greatly improves the address processing, dealing with 16 bits (mesh address) instead of 128 bits (Label UUID)

Source: www.bluetooth.com/.../mesh-faq