Method and system for saving dropped calls
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorBo Hellander
Life of this patent
Estimating the term…
Abstract
A method and system for reconnecting dropped calls in a mobile telecommunications network. Upon detecting a call drop of an ongoing call, a mobile station involved in the call transmits a call reconnect request to a target cell in the network. The target cell can be selected from a neighboring cell list received from a serving cell during the call. In response to the call reconnect request, a target switching node associated with the target cell locates the call and reconnects the mobile station to the call using a traffic channel in the target cell.
Claims24
A method for reconnecting dropped calls in a mobile telecommunications network, comprising the steps of:
- receiving a neighboring cell list identifying a plurality of cells at a mobile station;
- measuring a signal quality of at least one signal transmitted from at least one of the cells identified in the neighboring cell list;
- detecting at the mobile station a radio path loss of a call involving the mobile station;
- selecting a target cell based on said signal quality measurement;
- transmitting a call reconnect request from the mobile station to the target cell;
- requesting an identification of a serving switching node involved in the call from a remote database in response to the call reconnect request;
- and
- reconnecting the mobile station to the call in response to the call reconnect request.
A cellular telecommunications system, comprising:
- a serving switching node through which a call involving a mobile station is routed;
- a serving base station associated with the serving switching node, said first base station in radio contact with a mobile station prior to a loss of said radio contact;
- a target base station receiving a call re-connection request from the mobile station after said loss of radio contact;
- and
- a target switching node controlling said target base station, said target switching node assigning a traffic channel in the target base station for use by the mobile station and requesting an identification of the switching node involved in the call from a remote database in response to the call reconnect request, and wherein the target switching node establishes a radio connection on said traffic channel between said call and said mobile station in response to the call re-connection.
A method for reconnecting dropped calls in a mobile telecommunications system, comprising the steps of:
- detecting at a mobile station a call drop of a call involving the mobile station, said call drop including a loss of a radio link between the mobile station and a serving communication station;
- transmitting a call reconnect request from the mobile station to a target communication station associated with a target switching node in response to the detection of the call drop;
- requesting an identification of the switching node involved in the call from a remote database in response to the call reconnect request;
- locating the call, in response to the call reconnect request, at a switching node involved in the call, wherein said switching node involved in the call differs from the target switching node;
- and
- reconnecting the mobile station to the call using a radio link between the mobile station and the target communication station.
Dependencies are inferred from the claim text.