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US5940760A
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Method and apparatus to reduce non-public mode search time in a mobile station
Assignee: Nokia Oyj
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Filing: 1997-05-16
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Granted: 1999-08-17
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Expires: 2017-05-16
Abstract
Abstract In an embodiment of this invention that is suitable for practicing in an IS-136 or similarly compliant system, a method for operating a mobile station (10) includes steps of (A) receiving a Control Channel Selection Parameters message with the mobile station; (B) storing a SCANINTERVAL value received with the message in a memory (24) of the mobile station; in response to a user specifying a new system during an execution of a Non-Public System, Digital Control Channel (NPS-DCCH) selection procedure, (C) modifying the stored SCANINTERVAL value so as to indicate a measurement interval equal to a period of one Hyperframe; (D) performing signal strength measurements on a channel of the user-specified system using the modified SCANINTERVAL value; and, at the termination of the signal strength measurements, (E) restoring the SCANINTERVAL value to the value received in the Control Channel Selection Parameters message. The step of storing also stores a DELAY value received with the Control Channel Selection Parameters message, and in one embodiment the step of measuring ignores the stored DELAY value, while in another embodiment the step of modifying also modifies the stored DELAY value to have a value that is less than an amount of time that the mobile station has already been camped on a current DCCH.
Inventors
- 👤 Ari Uistola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:01
CPC Classifications
H; H04; H04W; H04W24/00; H04W48/00; H04W48/16; H04W48/18
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
177 words
A method for operating a mobile station, comprising steps of: storing information in the mobile station, the stored information being information that is received from a currently serving system for indicating at least a channel measurement interval to be employed when performing signal strength measurements; in response to a user specifying a new system, modifying the stored information so as to indicate a minimum channel measurement interval; performing signal strength measurements on a channel of the user-specified system using the minimum channel measurement interval; and at the termination of the signal strength measurements, restoring the stored information to the information that was received from the currently serving system; wherein the step of storing also stores further information for indicating a minimum amount of time that the mobile station must came on a current control channel before selecting a new control channel, and wherein the step of modifying also modifies the further information to have a value that is less than an amount of time that the mobile station has already been camped on a current control channel.
Claim 2
Independent Claim
177 words
A method for operating a mobile station, comprising steps of: storing information in the mobile station, the stored information being information that is received from a currently serving system for indicating at least a channel measurement interval to be employed when performing signal strength measurements; in response to a user specifying a new system, modifying the stored information so as to indicate a minimum channel measurement interval; performing signal strength measurements on a channel of the user-specified system using the minimum channel measurement interval; and at the termination of the signal strength measurements, restoring the stored information to the information that was received from the currently serving system; wherein the step of storing also stores further information for indicating a minimum amount of time that the mobile station must came on a current control channel before selecting a new control channel, and wherein the step of modifying also modifies the further information to have a value that is less than an amount of time that the mobile station has already been camped on a current control channel.
Claim 3
Dependent Claim
17 words
A method as in claim 1, wherein the user specifies a residential system or a private system.
Claim 4
Dependent Claim
22 words
A method as in claim 1, wherein the user specifies one of a public system, a residential system, or a private system.
Claim 5
Dependent Claim
18 words
A method as in claim 1, wherein the step of performing signal strength measurements ignores the further information.
Claim 6
Dependent Claim
184 words
A mobile station, comprising: a RF transceiver for bidirectionally communicating with base stations of public or autonomous communications systems; a user interface for displaying information to a user and for receiving an input from a user; a memory for storing information, the stored information including information received from a currently serving system for specifying at least one parameter that affects a time required to perform signal strength measurements on frequency channels; and a controller coupled to an output of said transceiver, to said user interface, and to said memory, said controller operating under the control of a stored program in said memory for modifying, in response to information entered by a user for specifying a new system, the at least one stored parameter from its original value so as to minimize the time required to perform signal strength measurements, for performing signal strength measurements on a channel of the user-specified system using the modified at least one stored parameter, and, in response to a termination of the signal strength measurements, for restoring said at least one parameter in said memory to its original value.
Claim 7
Dependent Claim
184 words
A mobile station, comprising: a RF transceiver for bidirectionally communicating with base stations of public or autonomous communications systems; a user interface for displaying information to a user and for receiving an input from a user; a memory for storing information, the stored information including information received from a currently serving system for specifying at least one parameter that affects a time required to perform signal strength measurements on frequency channels; and a controller coupled to an output of said transceiver, to said user interface, and to said memory, said controller operating under the control of a stored program in said memory for modifying, in response to information entered by a user for specifying a new system, the at least one stored parameter from its original value so as to minimize the time required to perform signal strength measurements, for performing signal strength measurements on a channel of the user-specified system using the modified at least one stored parameter, and, in response to a termination of the signal strength measurements, for restoring said at least one parameter in said memory to its original value.
Claim 8
Dependent Claim
18 words
A mobile station as in claim 5, wherein the user specifies a residential system or a private system.
Claim 9
Dependent Claim
23 words
A mobile station as in claim 5, wherein the user specifies one of a public system, a residential system, or a private system.
Claim 10
Dependent Claim
31 words
A mobile station as in claim 5, wherein said at least one parameter specifies a basic measurement interval between measurements for each frequency channel identified as requiring a signal strength measurement.
Claim 11
Dependent Claim
20 words
A mobile station as in claim 8, wherein said at least one stored parameter is expressed in units of Hyperframes.
Claim 12
Dependent Claim
28 words
A mobile station as in claim 9, wherein said at least one stored parameter is modified to indicate a time interval equal to a duration of one Hyperframe.
Claim 13
Dependent Claim
37 words
A mobile station as in claim 5, wherein said at least one stored parameter specifies a minimum amount of time that the mobile station must camp on a current control channel before selecting a new control channel.
Claim 14
Independent Claim
117 words
A method for operating a mobile station, comprising steps of: receiving a Control Channel Selection Parameters message with the mobile station; storing a SCANINTERVAL value received with the message in a memory of the mobile station; in response to a user specifying a new system during an execution of a Non-Public System, Digital Control Channel (NPS-DCCH) selection procedure, modifying the stored SCANINTERVAL value so as to indicate a measurement interval equal to a period of one Hyperframe; performing signal strength measurements on a channel of the user-specified system using the modified SCANINTERVAL value; and at the termination of the signal strength measurements, restoring the SCANINTERVAL value to the value received in the Control Channel Selection Parameters message.
Claim 15
Independent Claim
117 words
A method for operating a mobile station, comprising steps of: receiving a Control Channel Selection Parameters message with the mobile station; storing a SCANINTERVAL value received with the message in a memory of the mobile station; in response to a user specifying a new system during an execution of a Non-Public System, Digital Control Channel (NPS-DCCH) selection procedure, modifying the stored SCANINTERVAL value so as to indicate a measurement interval equal to a period of one Hyperframe; performing signal strength measurements on a channel of the user-specified system using the modified SCANINTERVAL value; and at the termination of the signal strength measurements, restoring the SCANINTERVAL value to the value received in the Control Channel Selection Parameters message.
Claim 16
Dependent Claim
35 words
A method as in claim 12, wherein the step of storing also stores a DELAY value received with the Control Channel Selection Parameters message, and wherein the step of measuring ignores the stored DELAY value.
Claim 17
Dependent Claim
60 words
A method as in claim 12, wherein the step of storing also stores a DELAY value received with the Control Channel Selection Parameters message, and wherein the step of modifying also modifies the stored DELAY value to have a value that is less than an amount of time that the mobile station has already been camped on a current DCCH.
Claim 18
Dependent Claim
75 words
A method as in claim 12, wherein if during the execution of the step of performing signal strength measurements the mobile station receives a second Control Channel Selection Parameters message, the method further comprises the steps of: buffering at least a portion of the second Control Channel Selection Parameters message; and at the termination of the signal strength measurements, restoring the SCANINTERVAL value to the value received in the second Control Channel Selection Parameters message.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-08-16 | 2003-02-15 | 2003-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-08-16 | 2007-02-15 | 2007-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-08-16 | 2011-02-15 | 2011-08-17 | $7700.00 | Window Closed / Lapsed |