System and method for dynamic cell searching

• US 8,554,163 B2
• Filed: 12/07/2009
• Issued: 10/08/2013
• Est. Priority Date: 12/07/2009
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Deshpande, Yogen N., Umatt, Bhupesh M.
• Primary Examiner(s): Rego, Dominic E
• Application Number:
  US12/632,705
• Publication Number:
  US 20110136530A1
• Time in Patent Office: 1,401 Days
• Field of Search: 455/67.11, 455/226.1, 455/63.3, 455/450, 455/135, 455/161.3, 455/277.2, 455/115.3, 455/134, 455/226.2, 455/522, 455 68- 70, 455/126, 455/127.1, 455/226.3, 455/422.1, 455/424, 455436-444, 370/344, 370/468, 370/395.4, 370/331
• US Class Current: 455/135
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 36/0088 Scheduling hand-off measurements
• CPC Class Codes: H04W 52/0251 using monitoring of local events, e.g. events related to user activity
• CPC Class Codes: H04W 52/0277 according to available power supply, e.g. switching off when a low battery condition is detected
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Systems and methods for signal detection are dynamic cell searching are disclosed. In one embodiment, the period according to which a channel is monitored is dynamically adjusted according to a condition of an electronic device. In another embodiment, between a first and second monitoring of a channel of a first cell, the amount of time searching for an second cell is dynamically adjusted according to a charging condition of an electronic device.

Claims

1. A method of determining channel conditions at an electronic device, the method comprising:

periodically, according to a first period determining a channel condition of a first channel, wherein the channel condition comprises at least one of a received signal power or a signal-to-noise ratio, and wherein the first channel is a channel of a serving cell;

determining a condition of the electronic device, wherein the determining comprises;

determining a speed of the electronic device,

determining whether the electronic device is receiving power from an external power supply, and

determining a battery charge level of the electronic device;

selecting a second period different from the first period based at least in part on the determined condition of the electronic device;

periodically, according to the second period, determining the channel condition of the first channel; and

initiating service with a second channel, wherein the second channel is a channel serving a neighboring cell, based at least in part on the determined channel condition.

2. The method of claim 1, wherein the second period is shorter than the first period.

3. The method of claim 1, wherein the condition of the electronic device is a Boolean condition.

4. The method of claim 1, wherein the condition of the electronic device is a non-Boolean condition.

5. The method of claim 1, wherein selecting the second period comprises using a look-up table.

6. The method of claim 1, wherein selecting the second period comprises using an equation including the condition as at least one input variable.

7. The method of claim 1, wherein the serving cell and the neighboring cell are cells of the same technology.

8. The method of claim 1, wherein the serving cell and the neighboring cell are cells of different technologies.

9. The method of claim 1, wherein the serving cell and the neighboring cell are cells in the same service provider network.

10. The method of claim 1, wherein the serving cell and the neighboring cell are cells of different service provider networks.

11. An electronic device comprising:

a transceiver configured to wirelessly communicate over at least one channel;

a jack configured to connect the electronic device to an external power supply;

a battery;

a velocity sensor; and

a processor configured to;

periodically, according to a first period, determine a channel condition of a first channel, wherein the channel condition comprises at least one of a received signal power or a signal-to-noise ratio, and wherein the first channel is a channel of a serving cell;

determine a condition of the electronic device, wherein the determining comprises;

determine a velocity of the electronic device,

determine whether the electronic device is receiving power from an external power supply, and

determine a battery charge level of the electronic device;

select a second period different from the first period based at least in part on the determined condition of the electronic device;

periodically, according to the second period, determine the channel condition of the first channel; and

initiate service with a second channel, wherein the second channel is a channel serving a neighboring cell, based at least in part on the determined channel condition.

12. The electronic device of claim 11, wherein the velocity sensor comprises at least one of a global positioning system (GPS), an accelerometer, or an adaptive pilot filtering module.

13. The electronic device of claim 11, further comprising a power interface for wirelessly receiving power via electromagnetic waves from the external power supply, wherein the charging condition of the electronic device is indicative of whether the electronic device is receiving power from the external power supply.

14. An electronic device comprising:

means for periodically, according to a first period, determining a channel condition of a first channel, wherein the channel condition comprises at least one of a received signal power or a signal-to-noise ratio, and wherein the first channel is one a channel of a serving cell;

means for determining a condition of the electronic device, wherein the determining comprises;

determining a speed of the electronic device,

determining whether the electronic device is receiving power from an external power supply, and

determining a battery charge level of the electronic device;

means for selecting a second period different from the first period based at least in part on the determined condition of the electronic device;

means for periodically, according to the second period, determining the channel condition of the first channel; and

means for initiating service with a second channel, wherein the second channel is a channel serving a neighboring cell, based at least in part on the determined channel condition.

15. A computer-readable medium storing instructions which, when executed by one or more processors, causes a computer to perform a method of determining channel conditions at an electronic device, the method comprising:

periodically, according to a first period, determining a channel condition of a first channel, wherein the channel condition comprises at least one of a received signal power or a signal-to-noise ratio, and wherein the first channel is a channel of a serving cell;

determining a condition of the electronic device, wherein the determining comprises;

determining a speed of the electronic device,

determining whether the electronic device is receiving power from an external power supply, and

determining a battery charge level of the electronic device;

selecting a second period different from the first period based at least in part on the determined condition of the electronic device;

periodically, according to the second period, determining the channel condition of the first channel; and

initiating service with a second channel, wherein the second channel is a channel serving a neighboring cell, based at least in part on the determined channel condition.