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US 6,633,754 B1Granted
Systems and methods for increasing emergency call access speed in radiocommunication systems
AssigneeEricsson Inc.
InventorAlex K. Raith
Life of this patent
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Abstract
The handling of emergency calls, e.g., 911 calls, should be performed on an expedited basis. Various techniques are described herein to expedite system access to radiocommunication systems when processing an emergency call. For example, control channel locking, origination message content, and retransmission rules are modified to reduce access time.
Claims23
A method for locking to a control channel in a radiocommunication system comprising the steps of:
- storing a set of preferences for evaluating candidate control channels in a remote station;
- identifying, in said remote station, a call to be placed as an emergency call;
- ignoring said set of preferences when evaluating a control channel for said emergency call;
- and
- locking to said control channel if said control channel is received by said remote station at a predetermined signal strength.
2 more elements
A remote station comprising:
- a receiver for receiving data over an air interface;
- a memory for storing preferences associated with control channel selection;
- and
- a processor for determining if a call is an emergency call and, based on a result of said determination, selectively ignoring said stored preferences and commanding said receiver to listen to a control channel which is received at a predetermined received signal strength.
1 more element
A system for locking to a control channel in a radiocommunication system comprising:
- means for storing a set of preferences for evaluating candidate control channels in a remote station;
- means for identifying, in said remote station, a call to be placed as an emergency call;
- means for ignoring said set of preferences when evaluating a control channel for said emergency call;
- and
- means for locking to said control channel if said control channel is received by said remote station at a predetermined signal strength.
2 more elements
Dependencies are inferred from the claim text.