IP Library Granted Patent US 8,208,927
Granted Patent B2
US 8,208,927 · App. 13/178,252 · Granted Jun 26, 2012

Method of system access to a wireless network

Assignee: Research In Motion Limited
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Quick Facts
Patent No.
US 8,208,927
App. No.
13/178,252
Granted
Jun 26, 2012
Kind
B2
Abstract

A method is performed by a wireless device. The method includes (a) preselecting a set of the base stations; (b) selecting a reverse link cost according to a preselected reverse link cost metric; (c) selecting a base station from the set of base stations; and (d) sending a probe signal at the selected reverse link cost to the selected base station. If a response is not received from the selected base station within a preselected time period and not all the base stations have been sent a probe signal at substantially the selected reverse link cost, then steps (c) through (d) are repeated with a different one of the base stations at substantially the selected reverse link cost. If a response is received from the selected base station within the timeout period, then the responding base station is selected to provide access to the wireless network.

Claims (26)

1. A method performed by a wireless device for accessing a wireless network through network base stations, comprising:

(a) selecting a reverse link cost according to an initial reverse link cost metric;

(b) selecting a base station from a set of base stations;

(c) sending a probe signal at the selected reverse link cost to the selected base station;

(d) if a response is not received from the selected base station within a timeout period and not all the base stations have been sent a probe signal at substantially the selected reverse link cost, then repeating steps (b) through (c) with a different one of the base stations at substantially the selected reverse link cost; and

(e) if a response is received from the selected base station within the timeout period, then selecting the responding base station to provide access to the wireless network.

2. The method of claim 1 wherein step (d) includes:

if a response is not received from the selected base station within the timeout period and all the base stations have been sent a probe signal at substantially the selected reverse link cost, then increasing the selected reverse link cost and repeating steps (b) through (d).

3. The method of claim 1 wherein, in step (b), the selecting of a base station is in accordance with a base station ranking based on the base stations' respective power consumptions.

4. The method of claim 1 wherein, in step (b), the selecting of a base station is in accordance with a base station ranking based on the base stations' respective signal strengths.

5. The method of claim 1 wherein, in step (b), the selecting of a base station is in accordance with a base station ranking based on the base stations' respective coding complexities.

6. The method of claim 1 wherein, in step (b), the selecting of a base station is in accordance with a base station ranking based on the base stations' respective modulation types.

7. The method of claim 1 wherein, in step (b), the selecting of a base station is in accordance with a base station ranking based on the base stations' respective member subscriber access costs.

8. The method of claim 1 wherein, in step (b), the selecting of a base station is in accordance with a base station ranking based on the base stations' respective bandwidths.

9. The method of claim 1 wherein, in step (b), the selecting of a base station is in accordance with a base station ranking based on the base stations' respective throughput.

10. The method of claim 1 wherein, in step (b), the selecting of a base station is in accordance with a base station ranking based on the base stations' respective latencies.

11. The method of claim 1 wherein, in step (b), the selecting of a base station is in accordance with a base station ranking based on the base stations' respective loads.

12. The method of claim 1 wherein, in step (b), the selecting of a base station is in accordance with a base station ranking based on forward link quality values, for the respective base stations, that are determined by the wireless device.

13. The method of claim 1 wherein, in step (b), the selecting of a base station is in accordance with a base station ranking based on forward link quality values, for the respective base stations, that are provided to the mobile device by each respective base station.

14. The method of claim 1 wherein the initial reverse link cost metric is power consumption by the mobile device.

15. The method of claim 1 wherein the initial reverse link cost metric is transmitted power by the mobile device.

16. The method of claim 1 wherein the initial reverse link cost metric is interference level at the mobile device.

17. The method of claim 1 wherein the initial reverse link cost metric is coding type by the mobile device.

18. The method of claim 1 wherein the initial reverse link cost metric is modulation type by the mobile device.

19. The method of claim 1 wherein the initial reverse link cost metric is network subscriber access cost by the mobile device.

20. The method of claim 1 wherein the initial reverse link cost metric is throughput by the mobile device.

Assignments (2)
CHANGE OF NAME Recorded Oct 24, 2014
From: RESEARCH IN MOTION LIMITED
To: BLACKBERRY LIMITED
Reel/Frame 034045/0741 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 26, 2011
From: ZHAO, WEN; JIN, XIN
To: RESEARCH IN MOTION LIMITED
Reel/Frame 026651/0198 →
Continuity (5)
Continuation 12715001 · Mar 1, 2010
Continuation 11607578 · Dec 1, 2006
Continuation 10498025
Provisional Application 60336687 · Dec 7, 2001
Related Publication 20110269501A1 · Nov 3, 2011