Method and arrangement for connection re-establishment in a telecommunication system

A method in a network node to be comprised in a network for controlling connection re-establishment between the network and a user equipment, said network serving the user equipment in a first cell comprised in the network, the method comprising:

• sending a configuration message to the user equipment, the configuration message defining one or more conditions to be fulfilled in order for the user equipment to apply a fast re-establishment procedure, wherein the one or more conditions comprise one or more of the following conditions:
• a condition that is defined to be fulfilled when, based on a received signal from a neighboring cell, the user equipment is within the coverage of said neighboring cell;
• a condition that is defined to be fulfilled when the received signal from said neighboring cell is stronger than a threshold value;
• and
• a condition that is defined to be fulfilled when, based on the received signal from said neighboring cell, a measurement event or measurement report is triggered for said neighboring cell;
• configuring the user equipment to evaluate said one or more conditions upon detection of connectivity problems towards the first cell;
• and
• configuring the user equipment to apply the fast re-establishment procedure or a normal re-establishment procedure with respect to said neighboring cell depending on if said one or more conditions are fulfilled for said neighboring cell, wherein the fast re-establishment procedure initiates connection re-establishment to said neighboring cell faster if said one or more conditions are fulfilled than the normal re-establishment procedure that the user equipment would otherwise apply if said one or more conditions were not fulfilled.

A user equipment adapted for controlling connection re-establishment between said user equipment and a when said user equipment is being served in a first cell comprised in said network, said user equipment comprising:

• a receiver, the receiver configured to:
• receive a configuration message from the network, the configuration message defining one or more conditions to be fulfilled in order to apply a fast re-establishment procedure, wherein the one or more conditions comprise one or more of the following conditions:
• a condition that is defined to be fulfilled when, based on a received signal from a neighboring cell, the user equipment is within the coverage of said neighboring cell;
• a condition that is defined to be fulfilled when the received signal from said neighboring cell is stronger than a threshold value;
• and
• a condition that is defined to be fulfilled when, based on the received signal from said neighboring cell, a measurement event or measurement report is triggered for said neighboring cell;
• and
• processing circuitry, the processing circuitry configured to:
• upon detection of connectivity problems towards the first cell, evaluate said one or more conditions;
• and
• apply the fast re-establishment procedure or a normal re-establishment procedure with respect to said neighboring cell depending on whether the one or more conditions are fulfilled for said neighboring cell, wherein the fast re-establishment procedure initiates connection re-establishment to said neighboring cell faster if said one or more conditions are fulfilled than the normal re-establishment procedure that said user equipment would otherwise apply if said one or more conditions were not fulfilled.

An arrangement in a network node, the arrangement comprising:

• a transmitter, the transmitter configured to:
• send a configuration message to the user equipment, the configuration message defining one or more conditions to be fulfilled in order for the user equipment to apply a fast re-establishment procedure, wherein the one or more conditions comprise one or more of the following conditions:
• a condition that is defined to be fulfilled when, based on a received signal from a neighboring cell, the user equipment is within the coverage of said neighboring cell;
• a condition that is defined to be fulfilled when the received signal from said neighboring cell is stronger than a threshold value;
• and
• a condition that is defined to be fulfilled when, based on the received signal from said neighboring cell, a measurement event or measurement report is triggered for said neighboring cell;
• and
• processing circuitry, the processing circuitry configured to:
• configure the user equipment to evaluate said one or more conditions upon detection of connectivity problems towards a first cell, and
• configure the user equipment to apply the fast re-establishment procedure or a normal re-establishment procedure with respect to said neighboring cell depending on if said one or more conditions are fulfilled for said neighboring cell, wherein the fast re-establishment procedure initiates connection re-establishment to said neighboring cell faster if said one or more conditions are fulfilled than the normal re-establishment procedure that the user equipment would otherwise apply if said one or more conditions were not fulfilled.