Methods And Apparatus Of Location Reporting Relations Between Wi-Fi Calling Capability And Cellular Network Registration

摘要

Various solutions for location reporting relations between Wi-Fi calling capability and cellular network registration are described. A processor of an apparatus detects that a subscriber identity associated with the apparatus is out of network coverage. The processor then obtains an identity (ID) of a last wireless network among one or more wireless networks that the apparatus camped on under the subscriber identity. The processor also reports at least the ID to a service provider. In reporting at least the ID, the processor may report the ID and at least a timestamp in a Cellular Network Information (CNI) header field of a Session Initiation Protocol (SIP) header.