Patent US6701150B1 successfully refreshed from Google Patents.
US6701150B1
Expired / Lapsed
US
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Network driven cell switching and handoff with load balancing for wireless systems
Assignee: RPX Clearinghouse LLC
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Filing: 2000-10-13
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Granted: 2004-03-02
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Expires: 2020-10-13
Abstract
Abstract One of a plurality of base stations is selected by a network entity, such as a mobile control point, for communicating with a respective remote station. Transmission channel quality information associated with at least two of the base stations is received at predefined intervals. Loading information associated with the base stations is received at further predefined intervals. A respective one of the base stations is selected as a function of the quality information and the loading information. An indication that the respective remote station is to commence communication with the selected one of the at least two base stations is sent to the respective remote station.
Inventors
- 👤 Wei Huang
- 👤 Hang Zhang
- 👤 Mo-Han Fong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:39
CPC Classifications
H; H04; H04W; H04W48/00; H04W48/20; H04W36/00; H04W36/08; H04W36/16; H04W36/20
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
225 words
A method of selecting one of a plurality of base stations for communicating with a respective remote station, said method comprising the steps of: receiving, at predefined intervals, transmission channel quality information associated with at least two of said plurality of base stations; receiving, at further predefined intervals, loading information associated with said at least two base stations; selecting a respective one of said at least two base stations as a function of said quality information and said loading information; and sending, to said respective remote station, an indication that said respective remote station is to commence communication with said selected one of said at least two base stations, said selecting step including selecting said respective one of said at least two base stations having a greatest k value, wherein said k value is defined by the relation: K i ∝ f 1 ( C / I ) i f 2 ( L i ) , wherein i is a respective index associated with a particular one of said at least two base stations, f 1 and f 2 are functions, (C/I) i is a carrier to interference ratio (C/I) of a forward link transmission channel associated with said particular base station, and i i is a function of number of packets that are stored in a buffer of said particular base station.
Claim 2
Independent Claim
225 words
A method of selecting one of a plurality of base stations for communicating with a respective remote station, said method comprising the steps of: receiving, at predefined intervals, transmission channel quality information associated with at least two of said plurality of base stations; receiving, at further predefined intervals, loading information associated with said at least two base stations; selecting a respective one of said at least two base stations as a function of said quality information and said loading information; and sending, to said respective remote station, an indication that said respective remote station is to commence communication with said selected one of said at least two base stations, said selecting step including selecting said respective one of said at least two base stations having a greatest k value, wherein said k value is defined by the relation: K i ∝ f 1 ( C / I ) i f 2 ( L i ) , wherein i is a respective index associated with a particular one of said at least two base stations, f 1 and f 2 are functions, (C/I) i is a carrier to interference ratio (C/I) of a forward link transmission channel associated with said particular base station, and i i is a function of number of packets that are stored in a buffer of said particular base station.
Claim 3
Dependent Claim
24 words
The method of claim 1 wherein said receiving transmission channel quality information step includes receiving said transmission channel quality information from said remote station.
Claim 4
Dependent Claim
23 words
The method of claim 2 wherein said remote station comprises at least one of: a mobile station (ms) and a stationary wireless station.
Claim 5
Dependent Claim
37 words
The method of claim 3 wherein said mobile station comprises at least one of: a cellular telephone, a wireless telephone, a personal digital assistant (pda), a handheld wireless communication device, and a pocket sized wireless communication device.
Claim 6
Dependent Claim
17 words
The method of claim 1 wherein said predefined intervals each comprise at least one time slot interval.
Claim 7
Dependent Claim
39 words
The method of claim 1 wherein said quality information associated with a particular one of said at least two base stations comprises a carrier to interference ratio (c/i) of a forward link transmission channel for said particular base station.
Claim 8
Dependent Claim
25 words
The method of claim 1 wherein said receiving loading information step includes receiving said loading information from said at least two base transceiver stations (bts).
Claim 9
Dependent Claim
18 words
The method of claim 1 wherein said further predefined intervals each comprise at least one time slot interval.
Claim 10
Dependent Claim
40 words
The method of claim 1 wherein said loading information associated with a particular one of said at least two base stations is a function of a number of packets that are stored in a buffer of said particular base station.
Claim 11
Dependent Claim
32 words
The method of claim 1 wherein said respective one of said at least two base stations has a greatest ratio of transmission channel quality information associated therewith to loading information associated therewith.
Claim 12
Dependent Claim
16 words
The method of claim 1 wherein said functions f 1 and f 2 are linear functions.
Claim 13
Dependent Claim
47 words
The method of claim 1 wherein said sending step includes sending, to said respective remote station, an indication that said respective remote station is to terminate communication with a further one of said at least two base stations that is currently communicating with said respective remote station.
Claim 14
Dependent Claim
32 words
The method of claim 1 further comprising the step of sending, to said selected base station, an indication that said selected base station is to commence communication with said respective remote station.
Claim 15
Dependent Claim
47 words
The method of claim 1 further comprising the step of sending, to a further one of said at least two base stations that is currently communicating with said respective remote station, an indication that said further base station is to terminate communication with said respective remote station.
Claim 16
Independent Claim
232 words
An apparatus of selecting one of a plurality of base stations for communicating with a respective remote station, said apparatus comprising: means for receiving, at predefined intervals, transmission channel quality information associated with at least two of said plurality of base stations; means for receiving, at further predefined intervals, loading information associated with said at least two base stations; means for selecting a respective one of said at least two base stations as a function of said quality information and said loading information; and means for sending, to said respective remote station, an indication that said respective remote station is to commence communication with said selected one of said at least two base stations, said selecting means including means for selecting said respective one of said at least two base stations having a greatest k value, wherein said k value is defined by the relation: K i ∝ f 1 ( C / I ) i f 2 ( L i ) , wherein i is a respective index associated with a particular one of said at least two base stations, f 1 and f 2 are functions, (C/I) i is a carrier to interference ratio (C/I) of a forward link transmission channel associated with said particular base station, and i i is a function of number of packets that are stored in a buffer of said particular base station.
Claim 17
Independent Claim
232 words
An apparatus of selecting one of a plurality of base stations for communicating with a respective remote station, said apparatus comprising: means for receiving, at predefined intervals, transmission channel quality information associated with at least two of said plurality of base stations; means for receiving, at further predefined intervals, loading information associated with said at least two base stations; means for selecting a respective one of said at least two base stations as a function of said quality information and said loading information; and means for sending, to said respective remote station, an indication that said respective remote station is to commence communication with said selected one of said at least two base stations, said selecting means including means for selecting said respective one of said at least two base stations having a greatest k value, wherein said k value is defined by the relation: K i ∝ f 1 ( C / I ) i f 2 ( L i ) , wherein i is a respective index associated with a particular one of said at least two base stations, f 1 and f 2 are functions, (C/I) i is a carrier to interference ratio (C/I) of a forward link transmission channel associated with said particular base station, and i i is a function of number of packets that are stored in a buffer of said particular base station.
Claim 18
Dependent Claim
26 words
The apparatus of claim 15 wherein said receiving transmission channel quality information means includes means for receiving said transmission channel quality information from said remote station.
Claim 19
Dependent Claim
23 words
The apparatus of claim 16 wherein said remote station comprises at least one of: a mobile station (ms) and a stationary wireless station.
Claim 20
Dependent Claim
37 words
The apparatus of claim 17 wherein said mobile station comprises at least one of: a cellular telephone, a wireless telephone, a personal digital assistant (pda), a handheld wireless communication device, and a pocket sized wireless communication device.
Claim 21
Dependent Claim
17 words
The apparatus of claim 15 wherein said predefined intervals each comprise at least one time slot interval.
Claim 22
Dependent Claim
39 words
The apparatus of claim 15 wherein said quality information associated with a particular one of said at least two base stations comprises a carrier to interference ratio (c/i) of a forward link transmission channel for said particular base station.
Claim 23
Dependent Claim
27 words
The apparatus of claim 15 wherein said receiving loading information means includes means for receiving said loading information from said at least two base transceiver stations (bts).
Claim 24
Dependent Claim
18 words
The apparatus of claim 15 wherein said further predefined intervals each comprise at least one time slot interval.
Claim 25
Dependent Claim
40 words
The apparatus of claim 15 wherein said loading information associated with a particular one of said at least two base stations is a function of a number of packets that are stored in a buffer of said particular base station.
Claim 26
Dependent Claim
32 words
The apparatus of claim 15 wherein said respective one of said at least two base stations has a greatest ratio of transmission channel quality information associated therewith to loading information associated therewith.
Claim 27
Dependent Claim
16 words
The apparatus of claim 15 wherein said functions f 1 and f 2 are linear functions.
Claim 28
Dependent Claim
47 words
The apparatus of claim 15 wherein said sending means includes sending, to said respective remote station, an indication that said respective remote station is to terminate communication with a further one of said at least two base stations that is currently communicating with said respective remote station.
Claim 29
Dependent Claim
31 words
The apparatus of claim 15 further comprising means for sending, to said selected base station, an indication that said selected base station is to commence communication with said respective remote station.
Claim 30
Dependent Claim
46 words
The apparatus of claim 15 further comprising means for sending, to a further one of said at least two base stations that is currently communicating with said respective remote station, an indication that said further base station is to terminate communication with said respective remote station.
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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) | 2007-03-02 | 2007-09-01 | 2008-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-03-02 | 2011-09-01 | 2012-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-03-02 | 2015-09-01 | 2016-03-02 | $7700.00 | Window Closed / Lapsed |