Mobile terminated call establishment during inter radio access technology (IRAT) re-direction

摘要

Mobile terminated call establishment during inter radio access technology (IRAT) re-direction. Handovers between different respective radio access technologies (RATs) may be performed (e.g., IRAT redirection procedure) such that a given wireless communication device may be in communication with a given RAT cell, and then switch from that RAT cell to another RAT cell (e.g., a target RAT cell). This transition may be from a 3G cell to a target 4G cell. During such a redirection procedure, there may be some instances in which the target RAT cell may not be available immediately, and a device can check back with the first/original RAT cell during the search for the target RAT cell. That is to say, there may be some duration of time during the search for the target RAT cell in which that particular cell may not be available, and the device checks for pages in the first/original RAT cell.

主权项

1. An apparatus comprising:
a processor; and a radio, the radio and the processor configured to:
support communication with at least one wireless communication device based on each of a plurality of radio access technologies (RATs);monitor for paging information associated with a first of the plurality of RATs during search for a second of the plurality of RATs when performing an inter radio access technology (IRAT) redirection procedure to transition from the first of the plurality of RATs to the second of the plurality of RATs;abort the IRAT redirection procedure and support the communication only based on the first of the plurality of RATs when paging information associated with the first of the plurality of RATs is detected by the radio during the search for the second of the plurality of RATs; andcontinue the IRAT redirection procedure to transition from the first of the plurality of RATs to the second of the plurality of RATs when no paging information associated with the first of the plurality of RATs is detected by the radio during the search for the second of the plurality of RATs.