US6961583B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wireless network system selection mechanism within a mobile station
Assignee: Samsung Electronics Co Ltd
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Filing: 1999-05-24
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Granted: 2005-11-01
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Expires: 2019-05-24
Abstract
Abstract A multi-mode mobile station independently determines the radio signal quality of a serving mobile system by evaluating the error rate associated with the received forward-link-channel messages. In response to a determination that the calculated error rate is greater than an acceptable threshold level, the mobile station then attempts to access an alternative service system capable of providing better and more reliable telecommunications service.
Inventors
- 👤 Bryan Jeffery Moles
- 👤 Nim Keung Leung
- 👤 Sing-Wai Wu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:23
CPC Classifications
H; H04; H04W; H04W36/00; H04W36/24; H04W36/30; H04W36/14; H04W88/00; H04W88/02; H04W88/06
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
188 words
A multi-mode mobile station comprising: a radio frequency (RF) module capable of accessing a first radio system using a preferred radio protocol and further capable of accessing a second radio system using a less-preferred radio protocol; and processing circuitry associated with said RF module capable of determining the quality of first control channel signals received from said first radio system and determining the quality of second control channel signals received from said second radio system, wherein said processing circuitry determines the quality of said first control channel signals by determining a number of control messages received during a predetermined time period in a first control channel in which said first control channel signals are transmitted and further determining if said number of received control messages exceeds a minimum threshold value, and said processing circuitry, in response to a determination that the quality of said first control channel signals is sufficient to prevent said multi-mode mobile station from losing access to said first radio system, further determines from the quality of said first control channel signals whether said first radio system is able to provide an optimum signal quality.
Claim 2
Dependent Claim
188 words
A multi-mode mobile station comprising: a radio frequency (RF) module capable of accessing a first radio system using a preferred radio protocol and further capable of accessing a second radio system using a less-preferred radio protocol; and processing circuitry associated with said RF module capable of determining the quality of first control channel signals received from said first radio system and determining the quality of second control channel signals received from said second radio system, wherein said processing circuitry determines the quality of said first control channel signals by determining a number of control messages received during a predetermined time period in a first control channel in which said first control channel signals are transmitted and further determining if said number of received control messages exceeds a minimum threshold value, and said processing circuitry, in response to a determination that the quality of said first control channel signals is sufficient to prevent said multi-mode mobile station from losing access to said first radio system, further determines from the quality of said first control channel signals whether said first radio system is able to provide an optimum signal quality.
Claim 3
Dependent Claim
62 words
The multi-mode mobile station as set forth in claim 1 , wherein said processing circuitry, in response to a determination that said first radio system is not able to provide an optimum signal quality, determines from the quality of said second control channel signals whether said second radio system is able to provide a better radio service than said first radio system.
Claim 4
Dependent Claim
54 words
The multi-mode mobile station as set forth in claim 2 , wherein said processing circuitry, in response to a determination that said second radio system is able to provide a better radio service than said first radio system, causes said RF module to access said second radio system instead of said first radio system.
Claim 5
Dependent Claim
43 words
The multi-mode mobile station as set forth in claim 3 , wherein said first control channel signals comprise at least one of: 1) pilot channel signals associated with said first radio system and 2) paging channel signals associated with said first radio system.
Claim 6
Dependent Claim
43 words
The multi-mode mobile station as set forth in claim 4 , wherein said second control channel signals comprise at least one of: 1) pilot channel signals associated with said second radio system and 2) paging channel signals associated with said second radio system.
Claim 7
Dependent Claim
37 words
The multi-mode mobile station as set forth in claim 1 , wherein said processing circuitry further determines the quality of said first control channel signals by determining a bit error rate associated with said received control messages.
Claim 8
Dependent Claim
31 words
The multi-mode mobile station as set forth in claim 6 , wherein said preferred radio protocol is a digital radio protocol and said less-preferred radio protocol is an analog radio protocol.
Claim 9
Dependent Claim
23 words
The multi-mode mobile station as set forth in claim 7 , wherein said preferred radio protocol is code division multiple access (CDMA) protocol.
Claim 10
Dependent Claim
23 words
The multi-mode mobile station as set forth in claim 7 , wherein said less-preferred radio protocol is Advanced Mobile Phone System (AMPS) protocol.
Claim 11
Independent Claim
162 words
A method of operating a multi-mode mobile station capable of accessing a first radio system using a preferred radio protocol and capable of accessing a second radio system using a less-preferred radio protocol, the method comprising the steps of: determining the quality of first control channel signals received from the first radio system by determining a number of control messages received during a predetermined time period in a first control channel in which the first control channel signals are transmitted and determining if the number of received control messages exceeds a minimum threshold value; determining the quality of second control channel signals received from the second radio system; and in response to a determination that the quality of the first control channel signals is sufficient to prevent the multi-mode mobile station from losing access to the first radio system, determining from the quality of the first control channel signals whether the first radio system is able to provide an optimum signal quality.
Claim 12
Independent Claim
162 words
A method of operating a multi-mode mobile station capable of accessing a first radio system using a preferred radio protocol and capable of accessing a second radio system using a less-preferred radio protocol, the method comprising the steps of: determining the quality of first control channel signals received from the first radio system by determining a number of control messages received during a predetermined time period in a first control channel in which the first control channel signals are transmitted and determining if the number of received control messages exceeds a minimum threshold value; determining the quality of second control channel signals received from the second radio system; and in response to a determination that the quality of the first control channel signals is sufficient to prevent the multi-mode mobile station from losing access to the first radio system, determining from the quality of the first control channel signals whether the first radio system is able to provide an optimum signal quality.
Claim 13
Dependent Claim
61 words
The method as set forth in claim 10 , further comprising the step, in response to a determination that the first radio system is not able to provide an optimum signal quality, of determining from the quality of the second control channel signals whether the second radio system is able to provide a better radio service than the first radio system.
Claim 14
Dependent Claim
53 words
The method as set forth in claim 11 , further comprising the step, in response to a determination that the second radio system is able to provide a better radio service than the first radio system, of causing the RF module to access the second radio system instead of the first radio system.
Claim 15
Dependent Claim
41 words
The method as set forth in claim 12 , wherein the first control channel signals comprise at least one of: 1) pilot channel signals associated with the first radio system and 2) paging channel signals associated with the first radio system.
Claim 16
Dependent Claim
41 words
The method as set forth in claim 13 , wherein the second control channel signals comprise at least one of: 1) pilot channel signals associated with the second radio system and 2) paging channel signals associated with the second radio system.
Claim 17
Dependent Claim
35 words
The method as set forth in claim 10 , further comprising the step of determining the quality of the first control channel signals by determining a bit error rate associated with the received control messages.
Claim 18
Dependent Claim
24 words
The method as set forth in claim 15 , wherein the preferred radio protocol and the less-preferred radio protocol is an analog radio protocol.
Claim 19
Dependent Claim
21 words
The method as set forth in claim 16 , wherein the preferred radio protocol is code division multiple access (CDMA) protocol.
Claim 20
Dependent Claim
21 words
The method as set forth in claim 16 , wherein the less-preferred radio protocol is Advanced Mobile Phone System (AMPS) protocol.
References Cited (Backward Citations)
US5119502A
Cited
US5504803A
Cited
US5842122A
Cited
US5548818A
Cited
US5535430A
Cited
US5722078A
Cited
US5754542A
Cited
US5950127A
Cited
US6085085A
Cited
US6021328A
Cited
US6006106A
Cited
US5999816A
Cited
US6011978A
Cited
US6625132B1
Cited
US6188897B1
Cited
US6748215B1
Cited
EP1424862A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2008-10-31 | 2009-05-02 | 2009-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2012-10-31 | 2013-05-02 | 2013-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2016-10-31 | 2017-05-02 | 2017-11-01 | $7700.00 | Window Closed / Lapsed |