Switching from a priority-based reselection mechanism to a rank-based reselection mechanism

An apparatus for wireless communication of a user equipment (UE), comprising:

• means for receiving a priority list associated with preferred radio frequencies from a serving base station, each radio frequency of the preferred radio frequencies associated with a first set of neighbor base stations operating on a first radio access technology (RAT);
• means for determining if the UE is able to reselect to the first RAT;
• means for selecting between different inter-RAT (IRAT) cell reselection mechanisms based on whether the UE is able to reselect to the first RAT, the different IRAT cell reselection including a priority-based IRAT cell reselection procedure and a rank-based IRAT cell reselection procedure;
• means for performing the priority-based IRAT cell reselection procedure based on the priority list for reselecting to a base station of the first set of neighbor base stations when the UE is able to reselect to the first RAT;
• and
• means for performing the rank-based IRAT cell reselection procedure based on signal strength when the UE is unable to reselect to the first RAT, the rank-based IRAT cell reselection procedure being performed independent of the priority list.

An apparatus for wireless communication of a user equipment (UE), comprising:

• a memory;
• and
• at least one processor coupled to the memory and configured to:
• receive a priority list associated with preferred radio frequencies from a serving base station, each radio frequency of the preferred radio frequencies associated with a first set of neighbor base stations operating on a first radio access technology (RAT);
• determine if the UE is able to reselect to the first RAT;
• select between different inter-RAT (IRAT) cell reselection mechanisms based on whether the UE is able to reselect to the first RAT, the different IRAT cell reselection including a priority-based IRAT cell reselection procedure and a rank-based IRAT cell reselection procedure;
• perform the priority-based IRAT cell reselection procedure based on the priority list for reselecting to a base station of the first set of neighbor base stations when the UE is able to reselect to the first RAT;
• and
• perform the rank-based IRAT cell reselection procedure based on signal strength when the UE is unable to reselect to the first RAT, the rank-based IRAT cell reselection procedure being performed independent of the priority list.

A computer-readable medium storing computer executable code of a user equipment (UE), comprising code to:

• receive a priority list associated with preferred radio frequencies from a serving base station, each radio frequency of the preferred radio frequencies associated with a first set of neighbor base stations operating on a first radio access technology (RAT);
• determine if the UE is able to reselect to the first RAT;
• select between different inter-RAT (IRAT) cell reselection mechanisms based on whether the UE is able to reselect to the first RAT, the different IRAT cell reselection including a priority-based IRAT cell reselection procedure and a rank-based IRAT cell reselection procedure;
• performing the priority-based IRAT cell reselection procedure based on the priority list for reselecting to a base station of the first set of neighbor base stations when the UE is able to reselect to the first RAT;
• and
• perform the rank-based IRAT cell reselection procedure based on signal strength when the UE is unable to reselect to the first RAT, the rank-based IRAT cell reselection procedure being performed independent of the priority list.