Abstract: Disclosed are techniques for wireless communication. In an aspect, a wireless communications device detects a trigger to communicate via non-terrestrial network (NTN) connectivity, determines whether one or more obstructions are estimated to be blocking a subset of NTN space vehicles of a set of NTN space vehicles expected to be in view of the wireless communications device at a current location of the wireless communications device, and transmits, in response to a determination that the one or more obstructions are estimated to be blocking the subset of NTN space vehicles, at least one message towards at least one NTN space vehicle of the set of NTN space vehicles other than the subset of NTN space vehicles.

Abstract: The present invention comprises a system and method for status notification. The method comprises receiving a subscription message from a first endpoint requesting status data for a second endpoint; detecting a change in status data of the second endpoint; and notifying the first endpoint of the change in status. The subscription message comprises a resource identifier associated with the second endpoint.

Abstract: A method for facilitating communication in a Session Initiation Protocol (SIP) environment is provided that includes receiving, by a first endpoint, dialog and presence information associated with a second endpoint. The first and second endpoints are operable to conduct a SIP communication system. The method also includes identifying the dialog and presence information associated with the second endpoint.