Method and system for transitioning between radio access technologies (RATS)

摘要

A method in a wireless communications device having a first protocol stack for use with a first radio access technology (RAT) and a second protocol stack for use with a second RAT, the first protocol stack comprising a reordering component associated with a first layer of the first protocol stack and arranged to implement a data reordering queue, the method for transitioning from the first RAT to the second RAT, the method comprising: determining that the device should transition from the first RAT to the second RAT; in response to determining that the device should transition, determining that data is present in a reordering queue implemented by the reordering component; sending the data present in the reordering queue to a second layer which is higher than the first layer; and attempting transitioning from the first RAT to the second RAT.

主权项

1. A method in a wireless communications device having a first protocol stack for use with a first radio access technology and a second protocol stack for use with a second radio access technology, the first protocol stack comprising a reordering component associated with a first layer of the first protocol stack and a timer associated with the reordering component, the method for performing a handover from the first radio access technology to the second radio access technology, the method comprising:
determining that the device should perform a handover from the first radio access technology to the second radio access technology; in response to determining that the device should perform a handover and before handover commences:
determining that the timer is running; andstopping the timer; and thereafter attempting a handover from the first radio access technology to the second radio access technology.