Conditional cell releasing

1 . An apparatus comprising at least one processor and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to at least perform:

determining conditional cell release information indicative of at least one condition based on which a configured cell of a cell group of a mobile communication network is to be released;

releasing the configured cell based, at least in part, on the conditional cell release information by de-configuring a link between the apparatus and the configured cell;

indicating an execution of the release of the configured cell to a master node of the mobile communication network,

wherein the least one condition comprises:

at least one Ax measurement event of the mobile communication network;

a lack of data in a transmission buffer; and

a loss of coverage provided by the configured cell,

wherein indicating an execution of the release of the configured cell comprises sending a respective radio resource control (RRC) signaling message indicating the releasing to a respective master node of the mobile communication network via a reliable communication link, wherein the indication comprises a confirmation message to the mobile communication network that the apparatus has released the configured cell based, at least in part, on the previously obtained reconfiguration information comprising the at least one condition, the confirmation message comprising an Uplink Information Transfer Multi-Radio Dual Connectivity (ULInformationTransferMRDC) message that includes an indication of Conditional Primary Secondary Cell Release (CPR) execution via a binary value to enable the respective master node to obtain the indication of the execution of the release of the configured cell.

2 . The apparatus according to claim 1 , the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus further to perform:

obtaining reconfiguration information indicative of one or more conditions based on which the releasing of the configured cell is to be performed, wherein the conditional cell release information is determined based, at least in part, on the reconfiguration information.

3 . The apparatus according to claim 1 , the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus further to perform:

indicating an execution of the release of the configured cell.

4 . The apparatus according to claim 2 , wherein the reconfiguration information is further indicative of bearer remapping information enabling a remapping of one or more configured bearers, wherein the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus further to perform:

releasing of the one or more bearers of the configured cell based, at least in part, on the bearer remapping information.

5 . The apparatus according to claim 1 , wherein when it is determined that a respective cell to which the apparatus may change has a better channel quality than a cell to which the mobile device might establish a link in case the configured cell is released, then instead of releasing the cell, changing of the configured cell to another cell of a secondary cell group is performed.

6 . The apparatus according to claim 4 , wherein the releasing of the one or more bearers is performed via a master node of the mobile communication network, wherein for releasing, dedicated signaling is used between the apparatus and the master node via radio resource control (RRC) messages.

7 . The apparatus according to claim 2 , wherein the reconfiguration information is obtained when the cell is configured.

8 . The apparatus according to claim 1 , wherein the configured cell is a PSCell of the mobile communication network.

9 . The apparatus according to claim 1 , the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus further to perform prior to determining conditional cell release information:

determining conditional cell change information indicative of at least one change condition from a configured cell to another cell; and

changing the configured cell to the another cell based, at least in part, on the conditional cell change information; and

postponing the determining of the conditional cell release information until the changing of the configured cell to the another cell is completed.

10 . A method comprising:

determining conditional cell release information indicative of at least one condition based on which a configured cell of a cell group of a mobile communication network is to be released;

releasing the configured cell based, at least in part, on the conditional cell release information by de-configuring a link between an apparatus and the configured cell; and

indicating an execution of the release of the configured cell to a master node of the mobile communication network,

wherein the least one condition comprises:

at least one Ax measurement event of the mobile communication network;

a lack of data in a transmission buffer; and

a loss of coverage provided by the configured cell,

wherein indicating an execution of the release of the configured cell comprises sending a respective radio resource control (RRC) signaling message indicating the releasing to a respective master node of the mobile communication network via a reliable communication link, wherein the indication comprises a confirmation message to the mobile communication network that the apparatus has released the configured cell based, at least in part, on the previously obtained reconfiguration information comprising the at least one condition, the confirmation message comprising an Uplink Information Transfer Multi-Radio Dual Connectivity (ULInformationTransferMRDC) message that includes an indication of Conditional Primary Secondary Cell Release (CPR) execution via a binary value to enable the respective master node to obtain the indication of the execution of the release of the configured cell.

11 . The method of claim 10 , wherein the at least one Ax measurement event of the mobile communication network is that a serving of the apparatus by a respective cell group becomes worse than a pre-defined threshold, the threshold comprising a minimum quality a respective channel may have.

12 . The method of claim 11 , wherein the determining of the conditional cell release information comprises checking one or more measurements of one or more Conditional Primary Secondary Cell Change (CPC) target cells at the respective time, the checking comprising determining that any of the one or more CPC target cells is better than a serving by the configured cell of the cell group than a pre-defined or defined according to pre-determined rules threshold, and postponing the releasing of the configured cell.