Mobile communication system with device handover and method of operation thereof

• US 9,049,638 B2
• Filed: 09/25/2013
• Issued: 06/02/2015
• 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): NGUYEN, DINH
• Application Number:
  US14/036,797
• Publication Number:
  US 20140024381A1
• Time in Patent Office: 615 Days
• Field of Search: 340/988, 342450-465, 370/310, 370/310.2, 370/328, 370/331, 370/332, 370/338, 455/404.2, 455/418, 455/419, 455/420, 455/425, 455/432.1, 455436-439, 455/440, 455441-444, 4554561-4566, 455/523
• US Class Current: 1/1
• 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 for representing the base carrier frequency signal between a mobile device and 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 frequency and a Doppler frequency based on the power spectral density according to the Rician K factor;

determining a movement for representing direction and speed of the mobile device relative to the cell tower location with a central processor unit based on the line-of-sight frequency, the Doppler frequency, and the Rician K factor; and

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

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 estimating 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. The 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 for representing the base carrier frequency signal between a mobile device and a cell tower location;

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 frequency and a Doppler frequency based on the power spectral density according to the Rician K factor;

a central processor unit for determining a movement for representing direction and speed of the mobile device relative to the cell tower location based on the line-of-sight frequency, the Doppler frequency, and the Rician K factor; and

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

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. The system as claimed in claim 8 further comprising a controller for determining a mobile speed of the mobile device.