US Patent 9584661 Extended efficient usage of emergency services keys
Patent 9584661 was granted and assigned to Telecommunication Systems, Inc. on February, 2017 by the United States Patent and Trademark Office.
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An emergency services key (e.g., ESQK or ESRK) is guaranteed to be available from a limited size ESQK pool. A plurality of ESQKs are grouped into a pool of emergency service keys “ESQK Pool ID”, each including anywhere from 1 to N number of ESQKs. Each ESQK preferably has a “Timestamp”, information relating to the specific emergency E911 call (“Call Data ID”), a guard timer, and an optional hold timer. The ESQK having a Call Data ID=“NULL”, and having the oldest Timestamp, is chosen for selection. If no such ESQK has both Call Data ID=NULL and the oldest Timestamp is found, then the ESQK with merely the oldest Timestamp is selected. The timestamp is reset to a current time plus a guard timer, or hold timer if desired.
US Patent 09584661 Extended efficient usage of emergency services keys US Patent 9584661 Extended efficient usage of emergency services keys
US Patent 09584661 Extended efficient usage of emergency services keys
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