US 2015/0092709 A1 · METHOD AND APPARATUS FOR LTE CELL SEARCH USING MULTIPLE RECEIVERS OF A MOBILE DEVICE

Abstract

A method using multiple receivers of a wireless communication device to accelerate cell selection and reselection is disclosed. Multiple receivers of the wireless device are used to implement carrier aggregation in LTE connected mode. The multiple receivers of the wireless device are used to search for cells concurrently across multiple radio frequency bands and/or multiple radio access technologies during cell selection and/or cell reselection procedures. A first receiver and a second receiver of the wireless device each search for cells over different radio frequency bands simultaneously, and accordingly the cell selection and reselection time is effectively reduced compared to using only one receiver. Multiple receivers are also used concurrently, in parallel, to accelerate inter-frequency cell detection and measurement and for inter-RAT searches and measurements.

Claims20

Dependent claims

A mobile device configurable for fast cell selection and reselection using multiple receivers, the mobile device comprising:

wireless circuitry comprising at least a first receiver, a second receiver, and a transmitter;
and
one or more processors communicatively coupled to the wireless circuitry and to a storage medium for storing program code that, when executed by the one or more processors, causes the mobile device to:
search concurrently a first set of cells associated with a first radio access technology (RAT) using the first receiver and a second set of cells associated with a second RAT using the second receiver;
generate a list of candidate frequencies for cell acquisition;
and
select a cell on which to camp using the list of candidate frequencies for cell acquisition.

4 more elements

A non-transitory machine-readable medium storing instructions that, when executed by one or more processors of a wireless device, cause the wireless device to:

determine a received signal code power (RSCP) of a present serving LTE cell;
and
when the RSCP of the present serving LTE cell falls below a first threshold and exceeds a second threshold:
perform an LTE inter-frequency cell detection and measurement procedure concurrently for a first set of LTE cells using a first receiver and for a second set of LTE cells using a second receiver, wherein the first set of LTE cells differs from the second set of LTE cells;
and
select a new serving LTE cell based on LTE inter-frequency cell detection and measurement data obtained for the first set of LTE cells and the second set of LTE cells.

3 more elements

Dependencies are inferred from the claim text.

Method and apparatus for lte cell search using multiple receivers of a mobile device

Life of this patent

Method and apparatus for lte cell search using multiple receivers of a mobile device

Life of this patent

Abstract

Claims20