DROPPED CALL DETECTION ALGORITHM
Original Publication Date: 1997-Sep-01
Included in the Prior Art Database: 2002-Jun-04
The IRIDIUM@ system provides global cellular telephony coverage via a constellation of 66 satel- lites positioned in low earth orbit. In such a system, the primary ends of the call are normally a satellite providing a connection to the user on the ground and a telephone switch providing an interconnection into the PSTN (Public Switched Telephone Network). See Figure 1. Each of these entities can directly see their end of the call. As such, they can determine directly if a call resource is still being used and release the resources being used if the call is ended.