# US 2014/0153479 A1 · System and Method for Time Saving Cell Search for Mobile Devices in Single and Multiple Radio Technology Communication Systems

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- Number: US 2014/0153479 A1
- Document ID: US20140153479A1
- Status: Published application
- Kind: A1
- Application number: 13/690,820
- Filed: 2012-11-30
- Published: 2014-06-05
- Earliest claimed: 2012-11-30
- Inventors: Faical Aiouaz; Fal Gao
- Web page: https://patentgrep.com/patent/US20140153479A1

## CPC

- H04W 48/16: Discovering, processing access restriction or access information
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A cellular device has a stacked protocol, with an upper layer and a lower layer. The lower layer includes a multiple carrier detection unit, a memory and a digital processing system. The multiple carrier detection unit receives a plurality of wireless carrier signals and provides a respective plurality of output digital streams. The memory is used to store a target cell search list, and the digital processing system processes the digital streams in parallel based upon parameters within the target cell search list. The parameters may include a frequency indicator and a radio access technology (RAT) indicator. The lower layer controls the multiple carrier detection unit to detect the wireless carrier signals based upon the frequencies and RATs in the target cell search list.

## Claims

### Claim at position 1

1-9. (canceled)

### Claim 10

A cellular device comprising a stacked protocol having an upper layer in communications with a lower layer, the cellular device comprising:
a multiple carrier detection unit configured to receive a plurality of wireless carrier signals and providing a respective plurality of output digital streams, wherein the upper layer is configured to (i) generate a plurality of cell search parameter sets for a respective plurality of target searches and (ii) provide the plurality of cell search parameter sets to the lower layer, and wherein the lower layer is configured to control the multiple carrier detection unit to detect the wireless carrier signals according to the frequencies in the cell search parameter sets; and
a digital processing system in communication with the multiple carrier detection unit, the digital processing system configured to process the digital streams according to the cell search parameter sets to generate signal processing results for each of the respective target searches,
wherein the upper layer is configured to receive at least one of the signal processing results, and cause the cellular device to (i) camp on at least one cell corresponding to the at least one signal processing result and (ii) connect to the at least one cell.

### Claim 11 (depends on 10)

The cellular device of claim 10 wherein the digital processing system processes the digital streams in parallel.

### Claim 12 (depends on 10)

The cellular device of claim 10 wherein the digital processing system processes the digital streams in real time.

### Claim 13 (depends on 10)

The cellular device of claim 10 where each cell search parameter set includes frequency information.

### Claim 14

(canceled)

### Claim 15 (depends on 10)

The cellular device of claim 10 further comprising a plurality of antennas electrically connected to the multiple carrier detection unit.

### Claim 16 (depends on 13)

The cellular device of claim 13 wherein each cell search parameter set further includes an indicator of one or multiple radio access technologies (RATs), and the digital processing system is configured to process the digital streams according to the RATs.

### Claim at position 9

17-18. (canceled)

### Claim 19 (depends on 10)

The cellular device of claim 10 wherein the upper layer is further configured to interrupt the lower layer in response to at least one of the signal processing results to stop processing a current cell search parameter set and causing the lower layer to process it previously unprocessed cell search parameter set.