US6647261B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Idle handoff method taking into account critical system jobs
Assignee: NXP BV
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Filing: 2000-07-20
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Granted: 2003-11-11
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Expires: 2020-07-20
Abstract
Abstract A cellular radio communication system has a number of cells covered by base stations communicating with mobile communication devices. The mobile communication device performs an idle handoff method. In the idle handoff method, the communication mobile device receives paging messages from a first base station, and initiates idle handoff from the first base station to a second base station if it is established that no other, critical idle-mode process with the first base station is being performed.
Inventors
- 👤 Debarag Narayan Banerjee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:12
CPC Classifications
H; H04; H04W; H04W48/00; H04W48/20; H04W36/00; H04W68/00; H04W76/00; H04W76/20; H04W76/28
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
95 words
In a mobile communication device comprised in a cellular radio communication system that further comprises a plurality of base stations an idle-mode handoff method, said method comprising: operating a physical layer software process; operating a data link layer software process; operating a call control software process; receiving paging messages from a first base station; and determining, within the mobile communication device, whether a critical idle-mode process is running in the call control layer software process; initiating an idle-mode handoff process from said first base station to a second base station if the determination is affirmative.
Claim 2
Dependent Claim
95 words
In a mobile communication device comprised in a cellular radio communication system that further comprises a plurality of base stations an idle-mode handoff method, said method comprising: operating a physical layer software process; operating a data link layer software process; operating a call control software process; receiving paging messages from a first base station; and determining, within the mobile communication device, whether a critical idle-mode process is running in the call control layer software process; initiating an idle-mode handoff process from said first base station to a second base station if the determination is affirmative.
Claim 3
Dependent Claim
90 words
A method as claimed in claim 1 , further comprising determining a first signal quality measure that is characteristic of a first paging channel that is associated with said first base station, said paging messages being received through said first paging channel, determining a second signal quality measure that is characteristic of a second paging channel that is associated with said second base station, and actually performing said idle-mode process if it is established that said first signal quality measure is worse than a minimum quality to sustain a communication.
Claim 4
Dependent Claim
21 words
A method as claimed in claim 2 , wherein said first and second signal quality measures are paging message error rates.
Claim 5
Dependent Claim
26 words
A method as claimed in claim 3 , wherein said paging message error rates are determined as a running average over a given period of time.
Claim 6
Dependent Claim
38 words
A method as claimed in claim 2 , wherein said first and second signal quality measures are determined on the basis of intervals between receiving valid paging signals and invalid paging signals over a given period of time.
Claim 7
Dependent Claim
19 words
A method as claimed in claim 2 , wherein said first and second signal quality measures are signal strengths.
Claim 8
Dependent Claim
40 words
A method as claimed in claim 2 , wherein said radio communication system is a code division multiple access system and said paging channels are slotted mode transmitted channels on respective pilot signals of said first and second base stations.
Claim 9
Dependent Claim
71 words
A method as claimed in claim 2 , wherein said idle-mode handoff process comprises a lower layer software process, and said other idle-mode process, when being performed, is a higher layer software layer process, said lower layer software process acquires said first and second signal quality measures, and said higher layer software process initiates said idle mode handoff process on the basis of said acquired first and second signal quality measures.
Claim 10
Dependent Claim
26 words
A method as claimed in claim 8 , wherein said higher layer software process retrieves said acquired first and second signal quality measures through inter-process communication.
Claim 11
Dependent Claim
19 words
A method as claimed in claim 8 , wherein said higher layer software process is a call control process.
Claim 12
Dependent Claim
25 words
A method as claimed in claim 7 , wherein said mobile communication device adopts a sleep mode between reception of said slotted mode transmitted channels.
Claim 13
Dependent Claim
104 words
A cellular radio communication system comprising: a plurality of cells having base stations covering said cells; and a mobile communication device comprising means for receiving paging messages from a first base station, and means for operating a physical layer software process; means for operating a data link layer software process; means for operating a call control layer software process; means for determining, within the mobile communication device, whether a critical idle-mode process is running in the call control layer software process; and means for initiating an idle-mode handoff process from said first base station to a second base station if the determination is affirmative.
Claim 14
Dependent Claim
104 words
A cellular radio communication system comprising: a plurality of cells having base stations covering said cells; and a mobile communication device comprising means for receiving paging messages from a first base station, and means for operating a physical layer software process; means for operating a data link layer software process; means for operating a call control layer software process; means for determining, within the mobile communication device, whether a critical idle-mode process is running in the call control layer software process; and means for initiating an idle-mode handoff process from said first base station to a second base station if the determination is affirmative.
Claim 15
Dependent Claim
92 words
A mobile communication device for use in a cellular radio communication system having a plurality of cells with base stations covering said cells, said mobile communication device comprising: means for receiving paging messages from a first base station; means for operating a physical layer software process; means for operating a data link layer software process; means for operating a call control layer software process; and means for initiating an idle-mode handoff process from said first base station to a second base station responsive to an affirmative determination by the means for determining.
Claim 16
Dependent Claim
92 words
A mobile communication device for use in a cellular radio communication system having a plurality of cells with base stations covering said cells, said mobile communication device comprising: means for receiving paging messages from a first base station; means for operating a physical layer software process; means for operating a data link layer software process; means for operating a call control layer software process; and means for initiating an idle-mode handoff process from said first base station to a second base station responsive to an affirmative determination by the means for determining.
Claim 17
Dependent Claim
98 words
A mobile communication device as claimed in claim 13 , further comprising means for determining a first signal quality measure that is characteristic of a first paging channel that is associated with said first base station, said paging messages being received through said first paging channel, means for determining a second signal quality measure that is characteristic of a second paging channel that is associated with said second base station, and means for actually performing said idle-mode process if it is established that said first signal quality measure is worse than a minimum quality to sustain a communication.
Claim 18
Dependent Claim
23 words
A mobile communication device as claimed in claim 14 , wherein said first and second signal quality measures are paging message error rates.
Claim 19
Dependent Claim
33 words
A mobile communication device as claimed in claim 15 , said mobile communication device being configured to determine said paging message error rates as a running average over a given period of time.
Claim 20
Dependent Claim
45 words
A mobile communication device as claimed in claim 14 , said mobile communication device being configured to determine said first and second signal quality measures on the basis of intervals between receiving valid paging signals and invalid paging signals over a given period of time.
Claim 21
Dependent Claim
21 words
A mobile communication device as claimed in claim 14 , wherein said first and second signal quality measures are signal strengths.
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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) | 2006-11-10 | 2007-05-12 | 2007-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-11-10 | 2011-05-12 | 2011-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-11-10 | 2015-05-12 | 2015-11-11 | $7700.00 | Window Closed / Lapsed |