MOBILE COMMUNICATION SYSTEM WITH DEVICE HANDOVER AND METHOD OF OPERATION THEREOF

• US 20130196670A1
• Filed: 01/27/2012
• Published: 08/01/2013
• Est. Priority Date: 01/27/2012
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Sungsoo, Kang, Inyup, Lee, Jungwon
• Granted Patent: US 8,588,789 B2
• Time in Patent Office: Days
• US Class Current: 455/440
• CPC Class Codes: G01S 11/06 using intensity measurements
• CPC Class Codes: H04W 36/00837 Determination of triggering parameters for hand-off
• CPC Class Codes: H04W 36/32 by location or mobility data, e.g. speed data
• CPC Class Codes: H04W 64/006 with additional information processing, e.g. for direction or speed determination

Abstract

A method of operation of a mobile communication system includes: receiving a base carrier frequency signal from a cell tower location; generating a power spectral density from the base carrier frequency signal; measuring a Rician K factor from the power spectral density; estimating a line-of-sight Doppler frequency based on the base carrier frequency signal; determining the cell tower location based on the Rician K factor; and activating a handover decision handler based on the cell tower location.

Claims

1. A method of operation of a mobile communication system comprising:

receiving a base carrier frequency signal from a cell tower location;

generating a power spectral density from the base carrier frequency signal;

measuring a Rician K factor from the power spectral density;

estimating a line-of-sight Doppler frequency based on the base carrier frequency signal;

determining the cell tower location based on the Rician K factor; and

activating a handover decision handler based on the cell tower location.

2. The method as claimed in claim 1 wherein estimating the line-of-sight Doppler frequency includes estimating the line-of-sight Doppler frequency based on the power spectral density.

3. The method as claimed in claim 1 further comprising counting samples of the base carrier frequency signal with a channel tap for generation of the power spectral density.

4. The method as claimed in claim 1 wherein measuring the Rician K factor includes determining power magnitudes of the power spectral density.

5. The method as claimed in claim 1 further comprising a line-of-sight frequency based on the power spectral density.

6. The method as claimed in claim 1 wherein determining the cell tower location includes determining a mobile intercept angle of the mobile device.

7. A method as claimed in claim 1 wherein determining the cell tower location includes determining a mobile speed of the mobile device.

8. A mobile communication system comprising:

an antenna for receiving a base carrier frequency signal;

a digital conditioner unit for generating a power spectral density from the base carrier frequency signal;

a digital signal processor for measuring a Rician K factor based on the power spectral density;

a finite state machine for estimating a line-of-sight Doppler frequency based on the base carrier frequency signal;

a central processor unit for determining the cell tower location based in the Rician K factor; and

a device control unit for activating a handover decision based on the cell tower location.

9. The system as claimed in claim 8 wherein the finite state machine is estimating the line-of-sight Doppler frequency based on the power spectral density.

10. The system as claimed in claim 8 further comprising a signal bridge unit for counting samples of the base carrier frequency signal with a channel tap for generation of the power spectral density.

11. The system as claimed in claim 8 wherein the digital signal processor is determining power magnitudes of the power spectral density.

12. The system as claimed in claim 8 further comprising an analog to digital converter for estimating a line-of-sight frequency based on the power spectral density.

13. The system as claimed in claim 8 further comprising a radio frequency receiver for determining a mobile intercept angle of the mobile device.

14. A method of operation of a mobile communication system comprising:

receiving a base carrier frequency signal from cell tower locations;

generating a power spectral density from the base carrier frequency signal;

measuring a Rician K factor from the power spectral density;

estimating a dominant relative line-of-sight Doppler frequency of the power spectral density of the base carrier frequency signal from each pair of the cell tower locations;

estimating an estimated peak Doppler frequency based on the dominant relative line-of-sight Doppler frequency of the power spectral density from the pairs of the cell tower locations; and

activating a handover decision handler to analyze the dominant relative line-of-sight Doppler frequency and the estimated peak Doppler frequency for execution of a mobile device handover relative to the cell tower locations.

15. The method as claimed in claim 14 further comprising calculating an arrival angle of the base carrier frequency signal to the mobile device from each of the cell tower locations.

16. The method as claimed in claim 14 wherein activating the handover decision handler to calculate the power magnitudes includes estimating dominant relative line-of-sight Doppler frequency based on the dominant relative line-of-sight Doppler frequency of the power spectral density.

17. The method as claimed in claim 14 wherein estimating the estimated peak Doppler frequency includes estimating the estimated peak Doppler frequency based on the power magnitudes between the pairs of the cell tower locations.

18. The method as claimed in claim 14 determining the Rician K factor of the power spectral density from each of the cell tower locations.

19. The method as claimed in claim 14 further comprising counting samples of the base carrier frequency signal with a channel tap for generation of the power spectral density of each of the cell tower locations.

20. The method as claimed in claim 14 wherein activating the handover decision handler includes the handover decision handler storing outputs of a calculator module.