CC2530: CC2530 with Z-Stack

There is no specific KeepAlive message for ZED in Zigbee spec. Do you mean to config polling rate?

I'm not sure about that function. My purpose is Parent device periodic checks End Device is alive or not. I see a mode is NWK_PARENT_INFO_MAC_DATA_POLL which uses the end device's MAC POLL request as the keep-alive notification. So could you tell me more detail about this mode?

You can find some information about NWK_PARENT_INFO_MAC_DATA_POLL in ZGlobals.c as the followings:

//======= Child Aging PARENT ROUTER (ZR/ZC) configuration ========
// You can setup a router to support Child Table Aging in 1 of 2 modes of
// operation. The first mode is NWK_PARENT_INFO_ORPHAN_NOTIFICATION and it
// expects end devices to use orphan scan periodically as a means of a keep-alive
// notification to the parent. The other mode is NWK_PARENT_INFO_MAC_DATA_POLL
// which uses the end device's MAC POLL request as the keep-alive notification.
// The first method is preferred for new devices, where the end devices provide
// support for it (which will be manditory in future Zigbee Home Automation
// Specifications).
// The second method is compatible with older end devices without the need for
// specific child aging support.
//
// The method supported by the router (or coordinator) is determined at build time
// by setting zgNwkParentInformation to either NWK_PARENT_INFO_ORPHAN_NOTIFICATION
// or NWK_PARENT_INFO_MAC_DATA_POLL.
//
// End device built with Child Table Aging support both methods, the method is
// determined by the parent and communicated at run-time.
#if ( ZG_BUILD_RTR_TYPE )
uint8 zgNwkParentInformation = NWK_PARENT_INFO_MAC_DATA_POLL;
#else
uint8 zgNwkParentInformation = NWK_PARENT_INFO_UNDEFINED;
#endif