Mobile communication system with device handover and method of operation thereof

• US 8,588,789 B2
• Filed: 01/27/2012
• Issued: 11/19/2013
• Est. Priority Date: 01/27/2012
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Sungsoo, Kang, Inyup, Lee, Jungwon
• Primary Examiner(s): Kim, Wesley
• Assistant Examiner(s): NGUYEN, DINH
• Application Number:
  US13/360,547
• Publication Number:
  US 20130196670A1
• Time in Patent Office: 662 Days
• Field of Search: 455/404.2, 455/418, 455/419, 455/420, 455/425, 455/432.1, 455436-439, 455/440, 455441-444, 4554561-4566, 455/523, 340/988, 342450-465, 370/310, 370/310.2, 370/328, 370/331, 370/332, 370/338
• 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 36/322 by location 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 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.

2. The method as claimed in claim 1 further comprising calculating an arrival angle of the base carrier frequency signal to the mobile device from each of the cell tower locations.

3. The method as claimed in claim 1 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.

4. The method as claimed in claim 1 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.

5. The method as claimed in claim 1 further comprising determining the Rician K factor of the power spectral density from each of the cell tower locations.

6. 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 of each of the cell tower locations.

7. The method as claimed in claim 1 wherein activating the handover decision handler includes the handover decision handler storing outputs of a calculator module.

8. A mobile communication system comprising:

an antenna for receiving a base carrier frequency signal from cell tower locations;

a digital conditioner unit, coupled to the antenna, configured to generate a power spectral density from the base carrier frequency signal;

a digital signal processor, coupled to the digital conditioner unit, for measuring a Rician K factor from the power spectral density;

a finite state machine, coupled to the digital signal processor, configured to estimate 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;

a central processor unit, coupled to the finite state machine, configured to estimate 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

a device control unit, coupled to the central processor unit, configured to activate 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.

9. The system as claimed in claim 8 further comprising a radio frequency receiver, coupled to the antenna, configured to calculate an arrival angle of the base carrier frequency signal to the mobile device from each of the cell tower locations.

10. The system as claimed in claim 8 wherein the finite state machine is configured to estimate the dominant relative line of sight Doppler frequency based on the dominant relative line of sight Doppler frequency of the power spectral density.

11. The system as claimed in claim 8 wherein the central processor unit is configured to estimate the estimated peak Doppler frequency based on the power magnitudes between the pairs of the cell tower locations.

12. The system as claimed in claim 8 wherein the digital signal processor is configured to determine the Rician K factor of the power spectral density from each of the cell tower locations.

13. The system as claimed in claim 8 further comprising a signal bridge unit, coupled to the antenna, configured to count 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.

14. The system as claimed in claim 8 wherein the device control unit includes a handover decision handler configured to store outputs of a calculator module.