Patent US5953665A successfully refreshed from Google Patents.
US5953665A
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Method and apparatus for digital control channel (DCCH) scanning and selection in a cellular telecommunications network
Assignee: Nokia Technologies Oy
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Filing: 1996-12-26
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Granted: 1999-09-14
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Expires: 2016-12-26
Abstract
Abstract A method for selecting a digital control channel (DCCH) for a mobile station operating in a cellular system. In the method, after a first DCCH meeting rssi requirements has been located, a search is made for a more preferable second DCCH before camping on the first DCCH. If a more preferred second DCCH is found, the mobile station then camps on the second DCCH. The method includes the process of performing a quick reselection on available digital control channels(DCCH) at points in the selection process, when a first DCCH that meets received signal strength (rssi) criteria at the mobile station has been located using a conventional process, but a more preferable second DCCH could possibly still be found. In an embodiment of the invention the quick reselection may be performed on DCCHs included in a neighbor cell list received on the first DCCH.
Inventors
- 👤 Ilpo Mattila
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:22
CPC Classifications
H; H04; H04W; H04W48/00; H04W48/16; H04W48/20
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
155 words
A method for selecting a digital control channel (DCCH) for a mobile station operating in a cellular system, said method comprising the steps of: determining a first digital control channel (DCCH) from a set of control channels, wherein said first DCCH meets at least one predetermined system DCCH selection requirement; reading, in response to determining said first DCCH, a neighbor cell list from said first DCCH, wherein said neighbor cell list identifies at least one other DCCH; determining whether a second DCCH that is more preferred for selection by the mobile station than said first DCCH is included in said neighbor cell list; and, if it is so determined, camping on said second DCCH without beforehand camping on said first DCCH; else if it is determined that a second DCCH more preferred for selection by the mobile station than said first DCCH is not included in said neighbor cell list; camping on said first DCCH.
Claim 2
Independent Claim
155 words
A method for selecting a digital control channel (DCCH) for a mobile station operating in a cellular system, said method comprising the steps of: determining a first digital control channel (DCCH) from a set of control channels, wherein said first DCCH meets at least one predetermined system DCCH selection requirement; reading, in response to determining said first DCCH, a neighbor cell list from said first DCCH, wherein said neighbor cell list identifies at least one other DCCH; determining whether a second DCCH that is more preferred for selection by the mobile station than said first DCCH is included in said neighbor cell list; and, if it is so determined, camping on said second DCCH without beforehand camping on said first DCCH; else if it is determined that a second DCCH more preferred for selection by the mobile station than said first DCCH is not included in said neighbor cell list; camping on said first DCCH.
Claim 3
Dependent Claim
39 words
The method of claim 1, wherein said step of determining a first DCCH comprises determining a first digital control channel (DCCH) from a set of control channels included in a last used DCCH list stored in the mobile station.
Claim 4
Dependent Claim
31 words
The method of claim 1, wherein said step of determining a first DCCH comprises determining a first digital control channel (DCCH) from DCCH information received over an analog control channel (ACCH).
Claim 5
Dependent Claim
42 words
The method of claim 1, wherein said step of determining a first DCCH comprises determining a first digital control channel (DCCH) from DCCH information received over a communications channel upon termination of a call between the mobile station and the cellular system.
Claim 6
Dependent Claim
77 words
The method of claim 1, wherein said step of determining a first DCCH comprises determining whether said first DCCH has a received signal strength (rssi) at the mobile station that meets a predetermined system DCCH selection requirement, and wherein said step of determining a second DCCH comprises determining whether a DCCH having a rssi at the mobile station that is a predetermined level above the rssi of said first DCCH is included in said neighbor cell list.
Claim 7
Dependent Claim
39 words
The method of claim 5, wherein said step of determining a first DCCH comprises determining a first digital control channel (DCCH) from a set of control channels included in a last used DCCH list stored in the mobile station.
Claim 8
Dependent Claim
30 words
The method of claim 5, wherein said step of determining a first DCCH comprises determining a first digital control channel (DCCH) from DCCH information received over an analog control channel(ACCH).
Claim 9
Dependent Claim
42 words
The method of claim 5, wherein said step of determining a first DCCH comprises determining a first digital control channel (DCCH) from DCCH information received over a communications channel upon termination of a call between the mobile station and the cellular system.
Claim 10
Dependent Claim
70 words
The method of claim 1, wherein said step of determining a second DCCH comprises the steps of: selecting a plurality of selected DCCHs from said neighbor cell list; measuring a rssi for each of said plurality of selected DCCHs; and determining whether a DCCH having a rssi at the mobile station that is a predetermined level above the rssi of said first DCCH is included in said neighbor cell list.
Claim 11
Independent Claim
156 words
An apparatus for selecting a digital control channel (DCCH) for a mobile station operating in a cellular system, said apparatus comprising: means for determining a first digital control channel (DCCH) from a set of control channels, wherein said first DCCH meets at least one predetermined system DCCH selection requirement; means for reading, in response to a determination made by said means for determining said first DCCH, a neighbor cell list from said first DCCH, wherein said neighbor cell list identifies a plurality of other DCCHs; means for determining whether a second DCCH more preferred for selection by the mobile station than said first DCCH is included in said plurality of other DCCHs; means for camping on said second DCCH in response to a positive determination in said means for determining, without beforehand camping on said first DCCH; and means for camping on said first DCCH in response to a negative determination in said means for determining.
Claim 12
Independent Claim
156 words
An apparatus for selecting a digital control channel (DCCH) for a mobile station operating in a cellular system, said apparatus comprising: means for determining a first digital control channel (DCCH) from a set of control channels, wherein said first DCCH meets at least one predetermined system DCCH selection requirement; means for reading, in response to a determination made by said means for determining said first DCCH, a neighbor cell list from said first DCCH, wherein said neighbor cell list identifies a plurality of other DCCHs; means for determining whether a second DCCH more preferred for selection by the mobile station than said first DCCH is included in said plurality of other DCCHs; means for camping on said second DCCH in response to a positive determination in said means for determining, without beforehand camping on said first DCCH; and means for camping on said first DCCH in response to a negative determination in said means for determining.
Claim 13
Dependent Claim
40 words
The apparatus of claim 10, wherein said means for determining a first DCCH comprises means for determining a first digital control channel(DCCH) from a set of control channels included in a last used DCCH list stored in the mobile station.
Claim 14
Dependent Claim
31 words
The apparatus of claim 10, wherein said means for determining a first DCCH comprises means for determining a first digital control channel(DCCH) from DCCH information received over an analog control channel(ACCH).
Claim 15
Dependent Claim
43 words
The apparatus of claim 10, wherein said means for determining a first DCCH comprises means for determining a first digital control channel(DCCH) from DCCH information received over a communications channel upon termination of a call between the mobile station and the cellular system.
Claim 16
Dependent Claim
81 words
The apparatus of claim 10, wherein said means for determining a first DCCH comprises means for determining whether said first DCCH has an received signal strength(rssi) at the mobile station that meets a predetermined system DCCH selection requirement, and, wherein said means for determining a second DCCH comprises means for determining whether a DCCH having a rssi at the mobile station that is a predetermined level above the rssi of said first DCCH is included in said plurality of other DCCHs.
Claim 17
Dependent Claim
40 words
The apparatus of claim 14, wherein said means for determining a first DCCH comprises: means for determining a first digital control channel(DCCH) from a set of control channels included in a last used DCCH list stored in the mobile station.
Claim 18
Dependent Claim
31 words
The apparatus of claim 14, wherein said means for determining a first DCCH comprises: means for determining a first digital control channel(DCCH) from DCCH information received over an analog control channel(ACCH).
Claim 19
Dependent Claim
42 words
The apparatus of claim 14, wherein said means determining a first DCCH comprises: means for determining a first digital control channel(DCCH) from DCCH information received over a communications channel upon termination of a call between the mobile station and the cellular system.
Claim 20
Dependent Claim
73 words
The apparatus of claim 10, wherein said means for determining a second DCCH comprises: means for selecting a plurality of selected DCCHs from said plurality of other DCCHs; means for measuring a rssi for each of said plurality of selected DCCHs; and means for determining whether a DCCH having a rssi at the mobile station a predetermined level above the rssi of said first DCCH is included in said plurality of selected DCCHs.
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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) | 2002-09-13 | 2003-03-15 | 2003-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-09-13 | 2007-03-15 | 2007-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-09-13 | 2011-03-15 | 2011-09-14 | $7700.00 | Window Closed / Lapsed |