METHODS FOR RAPIDLY SWITCHING BETWEEN DIFFERENT RATS AND COMMUNICATIONS APPARATUSES UTILIZING THE SAME

摘要

A communications apparatus includes an RF signal processing device, a baseband signal processing device and a processor. The processor controls operations of the RF signal processing device and the baseband signal processing device, camps on a first cell of a first RAT, receives a predetermined set of system information (SI) from one or more second cells of a second RAT and stores the predetermined set of SI in an SI early-reading database. When performing a RAT change procedure to switch from the first RAT to the second RAT is required, the processor further retrieves the predetermined set of SI of a target cell of the second RAT from the SI early-reading database and performs the RAT change procedure to camp on the target cell based on the retrieved predetermined set of SI.

主权项

1. A communications apparatus in a network environment comprising a plurality of cells belonging to different radio access technologies (RATs), comprising:
a radio frequency (RF) signal processing device, processing a plurality of RF signals to generate a plurality of baseband signals; a baseband signal processing device, processing the baseband signals; and a processor, for controlling operations of the RF signal processing device and the baseband signal processing device, wherein when camping on a first cell of a first RAT, the processor further receives a predetermined set of system information (SI) from one or more second cells of a second RAT and stores the predetermined set of SI in an SI early-reading database, and when performing a RAT change procedure to switch from the first RAT to the second RAT is required, the processor further retrieves the predetermined set of SI of a target cell of the second RAT from the SI early-reading database and performs the RAT change procedure to camp on the target cell based on the retrieved predetermined set of SI.