Android Wear Bluetooth communication protocol?

[AC Question]

Hi, does anyone know if there is any information about what communication protocol is used between Android wear watches and Android phones? I'm working on developing a wearable device and we already have notifications working with iOS devices via Bluetooth LE by using ANCS. We would like to achieve the same with Android phones and as there are already a number of Android wear watches out there, I presume there is a Bluetooth protocol defined by google that is being used between them that we could implement, rather than having to come up with our own custom protocol?