How does a Device/Service Discovery process work?
top Device discovery is the process whereby a ZigBee device can discover other ZigBee devices by initiating queries that are broadcast or unicast addressed. Service discovery is the process whereby services available on endpoints at the receiving device are discovered by external devices. Service means the interfaces described by means of Device Descriptors set. Service discovery can be accomplished by issuing a query for each endpoint on a given device, by using a match service feature (either broadcast or unicast) or by having devices announce themselves when they join the network. Service discovery utilizes the complex, user, node or power descriptors plus the simple descriptor further addressed by the endpoint (for the connected application object). The service discovery process in ZigBee is critical for successfully interfacing devices within the network. Through specific requests for descriptors on specified nodes, broadcast requests for service matching and the ability to ask a
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