Patent USRE36078E successfully refreshed from Google Patents.
USRE36078E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Handover method for mobile radio system
Assignee: Telefonaktiebolaget LM Ericsson AB
•
Filing: 1997-09-26
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Granted: 1999-02-02
•
Expires: 2017-09-26
Abstract
Abstract The invention relates to a method in mobile radio systems in which the responsibility for transmitting message information to a mobile station (MS 1 , MS 2 ) is handed over from at least a first base station transmitter (B ma , B mb ) to at least a second base station transmitter (B na , B nb ). In accordance with the invention, the same radio channel is used, if possible, before and after the handover for transmitting message information to the mobile station. If the same radio channel can be utilized, the handover takes place without the mobile station being informed beforehand of the handover by a special signal or order or the like. In digital mobile radio systems with digital transmission of message information by digital modulation of the radio signals, the transmission is preferably started from a second base station transmitter before the transmission is terminated from a first base station transmitter. During a transmission time substantially the same message information is transmitted to the mobile station from both at least one first and one second base station transmitter.
Inventors
- 👤 Jan-Erik Uddenfeldt
- 👤 Alex K. Raith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:41
CPC Classifications
H; H04; H04M; H04M15/00; H04M15/82; H04M15/825; H04W; H04W36/00; H04W36/0005; H04W36/0083; H04M2215/00; H04M2215/32; H04M2215/78; H04M2215/7853; H04W36/08
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
142 words
A method of communication in a cellular mobile radio system having a plurality of base station transmitters and mobile stations comprising the steps of: transmitting, from a first base station transmitter, radio signals digitally modulated with message information to a mobile station; while transmitting the radio signals from the first base station transmitter to the mobile station, beginning to transmit from a second base station transmitter to the mobile station radio signals digitally modulated with substantially the same message information; .Iadd.combining, in said mobile station, information transmitted by said first base station transmitter and information transmitted by said second base station transmitter to reconstruct said message information; .Iaddend.and terminating the transmission from the first base station transmitter to the mobile station while continuing to transmit from the second base station transmitter radio signals digitally modulated with message information to the mobile station.
Claim 2
Independent Claim
142 words
A method of communication in a cellular mobile radio system having a plurality of base station transmitters and mobile stations comprising the steps of: transmitting, from a first base station transmitter, radio signals digitally modulated with message information to a mobile station; while transmitting the radio signals from the first base station transmitter to the mobile station, beginning to transmit from a second base station transmitter to the mobile station radio signals digitally modulated with substantially the same message information; .Iadd.combining, in said mobile station, information transmitted by said first base station transmitter and information transmitted by said second base station transmitter to reconstruct said message information; .Iaddend.and terminating the transmission from the first base station transmitter to the mobile station while continuing to transmit from the second base station transmitter radio signals digitally modulated with message information to the mobile station.
Claim 3
Dependent Claim
43 words
A method according to claim 1 comprising the step of: transmitting, from a third base station transmitter to the mobile station, radio signals digitally modulated with substantially the same message information as the signals transmitted by the first or second base station transmitters.
Claim 4
Dependent Claim
41 words
A method according to claim 1 further comprising the step of: transmitting, from a fourth base station transmitter to the mobile station, radio signals digitally modulated with substantially the same message information as the signals from the second base station transmitter.
Claim 5
Independent Claim
139 words
A method of communication in a cellular mobile radio system having a plurality of base station transmitters and mobile stations comprising the steps of: transmitting, from a first base station transmitter for a first cell, radio signals digitally modulated with message information to a mobile station; while transmitting the radio signals from the first base station transmitter to the mobile station, beginning to transmit, from a second base station transmitter for a second cell to the mobile station, radio signals digitally modulated with substantially the same message information; .Iadd.combining, in said mobile station, information transmitted by said first base station transmitter and information transmitted by said second base station transmitter to reconstruct said message information; .Iaddend.and terminating the transmission from the first base station transmitter to the mobile station while continuing to transmit from the second base station transmitter.
Claim 6
Independent Claim
139 words
A method of communication in a cellular mobile radio system having a plurality of base station transmitters and mobile stations comprising the steps of: transmitting, from a first base station transmitter for a first cell, radio signals digitally modulated with message information to a mobile station; while transmitting the radio signals from the first base station transmitter to the mobile station, beginning to transmit, from a second base station transmitter for a second cell to the mobile station, radio signals digitally modulated with substantially the same message information; .Iadd.combining, in said mobile station, information transmitted by said first base station transmitter and information transmitted by said second base station transmitter to reconstruct said message information; .Iaddend.and terminating the transmission from the first base station transmitter to the mobile station while continuing to transmit from the second base station transmitter.
Claim 7
Dependent Claim
45 words
A method according to claim 4 further comprising the step of: transmitting, from a third base station transmitter to the mobile station, radio signals digitally modulated with substantially the same message information to as the signals transmitted by the first or second base station transmitters.
Claim 8
Dependent Claim
40 words
A method according to claim 4 comprising the step of: transmitting, from a fourth base station transmitter to the mobile station, radio signals digitally modulated with substantially the same message information as the signals from the second base station transmitter.
Claim 9
Independent Claim
156 words
A method of communication in a cellular mobile radio system having a plurality of base station transmitters and mobile stations comprising the steps of: transmitting, from a first base station transmitter to a mobile station, radio signals digitally modulated with message information to . .the.!. .Iadd.a .Iaddend.mobile station; transmitting, from a second base station transmitter . .to the mobile station.!., radio signals digitally modulated with substantially the same message information to . .the.!. .Iadd.a .Iaddend.mobile station; .Iadd.combining, in said mobile station, information transmitted by said first base station transmitter and information transmitted by said second base station transmitter to reconstruct said message information; .Iaddend.and before terminating the transmission from the first or second base station transmitter of the digitally modulated radio signals to the mobile station, beginning to transmit from a third base station transmitter radio signals digitally modulated with substantially the same message information as the signals from the first and second base station transmitters.
Claim 10
Independent Claim
156 words
A method of communication in a cellular mobile radio system having a plurality of base station transmitters and mobile stations comprising the steps of: transmitting, from a first base station transmitter to a mobile station, radio signals digitally modulated with message information to . .the.!. .Iadd.a .Iaddend.mobile station; transmitting, from a second base station transmitter . .to the mobile station.!., radio signals digitally modulated with substantially the same message information to . .the.!. .Iadd.a .Iaddend.mobile station; .Iadd.combining, in said mobile station, information transmitted by said first base station transmitter and information transmitted by said second base station transmitter to reconstruct said message information; .Iaddend.and before terminating the transmission from the first or second base station transmitter of the digitally modulated radio signals to the mobile station, beginning to transmit from a third base station transmitter radio signals digitally modulated with substantially the same message information as the signals from the first and second base station transmitters.
Claim 11
Dependent Claim
50 words
A method according to claim 7 further comprising the step of: terminating the transmission from the first base station transmitter to the mobile station while continuing to transmit from the second and third base station transmitters radio signals digitally modulated with substantially the same message information to the mobile station.
Claim 12
Dependent Claim
41 words
A method according to claim 7 further comprising the step of: terminating the transmission from the second base station transmitter while continuing to transmit from the third base station transmitters radio signals digitally modulated with message information to the mobile station.
Claim 13
Dependent Claim
96 words
A method according to claim 7 further comprising the steps of: before terminating the transmission of the digitally modulated signals from the second base station transmitter, beginning to transmit from a fourth base station transmitter to the mobile station radio signals digitally modulated with substantially the same message information as the signals from the second and third base station transmitters; and terminating the transmission from the second base station transmitter while continuing to transmit from the third and fourth base station transmitters radio signals digitally modulated with substantially the same message information to the mobile station.
Claim 14
Independent Claim
145 words
A method of communication in a cellular mobile radio system having a plurality of base station transmitters and mobile stations comprising the steps of: transmitting, from a first base station transmitter, for a first cell radio signals digitally modulated with message information to a mobile station; transmitting from a second base station transmitter radio signals digitally modulated with substantially the same message information to the mobile station; . .and.!. before terminating the transmission from the first or second base station transmitter to the mobile station, beginning to transmit from a third base station transmitter for a second cell radio signals digitally modulated with substantially the same message information as the signals from the first and second base station transmitters.Iadd.; and combining, in said mobile station, information transmitted by at least two of said first, second and third base station transmitters to reconstruct said message information.Iaddend..
Claim 15
Independent Claim
145 words
A method of communication in a cellular mobile radio system having a plurality of base station transmitters and mobile stations comprising the steps of: transmitting, from a first base station transmitter, for a first cell radio signals digitally modulated with message information to a mobile station; transmitting from a second base station transmitter radio signals digitally modulated with substantially the same message information to the mobile station; . .and.!. before terminating the transmission from the first or second base station transmitter to the mobile station, beginning to transmit from a third base station transmitter for a second cell radio signals digitally modulated with substantially the same message information as the signals from the first and second base station transmitters.Iadd.; and combining, in said mobile station, information transmitted by at least two of said first, second and third base station transmitters to reconstruct said message information.Iaddend..
Claim 16
Dependent Claim
46 words
A method according to claim 11 further comprising the step of: terminating the transmission from the first base station transmitter while continuing to transmit from the second and third base station transmitters radio signals digitally modulated with substantially the same message information to the mobile station.
Claim 17
Dependent Claim
41 words
A method according to claim 11 further comprising the step of: terminating the transmission from the second base station transmitter while continuing to transmit from the third base station transmitter radio signals digitally modulated with message information to the mobile station.
Claim 18
Dependent Claim
91 words
A method according to claim 11 further comprising the step of: before terminating the transmission from the second base station transmitter, beginning to transmit from a fourth base station transmitter to the mobile station radio signals digitally modulated with substantially the same message information as the signals from the second and third base station transmitters; and terminating the transmission from the second base station transmitter while continuing to transmit from the third and fourth base station transmitters radio signals digitally modulated with substantially the same message information to the mobile station.
Claim 19
Independent Claim
173 words
A method of communication in a cellular mobile radio system having a plurality of base station transmitters and mobile stations comprising the steps of: transmitting, from a first base station transmitter, radio signals digitally modulated with message information to a mobile station; transmitting, from a second base station transmitter, radio signals digitally modulated with substantially the same message information to the mobile station; before terminating the transmission from the first or second base station transmitter to the mobile station, beginning to transmit from a third base station transmitter radio signals digitally modulated with substantially the same message information as the signals from the first and second base station transmitters; . .and.!. .Iadd.combining, in said mobile station, information transmitted by at least two of said first, second and third base station transmitters to reconstruct said message information; and .Iaddend. terminating the transmission from the first base station transmitter while continuing to transmit from the second and third base station transmitters radio signals digitally modulated with substantially the same message information to the mobile station.
Claim 20
Independent Claim
173 words
A method of communication in a cellular mobile radio system having a plurality of base station transmitters and mobile stations comprising the steps of: transmitting, from a first base station transmitter, radio signals digitally modulated with message information to a mobile station; transmitting, from a second base station transmitter, radio signals digitally modulated with substantially the same message information to the mobile station; before terminating the transmission from the first or second base station transmitter to the mobile station, beginning to transmit from a third base station transmitter radio signals digitally modulated with substantially the same message information as the signals from the first and second base station transmitters; . .and.!. .Iadd.combining, in said mobile station, information transmitted by at least two of said first, second and third base station transmitters to reconstruct said message information; and .Iaddend. terminating the transmission from the first base station transmitter while continuing to transmit from the second and third base station transmitters radio signals digitally modulated with substantially the same message information to the mobile station.
Claim 21
Dependent Claim
41 words
A method according to claim 15 further comprising the step of: terminating the transmission from the second base station transmitter while continuing to transmit from the third base station transmitter radio signals digitally modulated with message information to the mobile station.
Claim 22
Dependent Claim
91 words
A method according to claim 15 further comprising the steps of: before terminating the transmission from the second base station transmitter, beginning to transmit from a fourth base station transmitter to the mobile station radio signals digitally modulated with substantially the same message information as the signals from the second and third base station transmitters; and terminating the transmission from the second base station transmitter while continuing to transmit from the third and fourth base station transmitters radio signals digitally modulated with substantially the same message information to the mobile station.
Claim 23
Independent Claim
181 words
A method of communication in a cellular mobile radio system having a plurality of base station transmitters and mobile stations comprising the steps of: transmitting, from a first base station transmitter for a first cell, radio signals digitally modulated with message information to a mobile station; transmitting, from a second base station transmitter, radio signals digitally modulated with substantially the same message information to the mobile station; before terminating the transmission from the first or second base station transmitter to the mobile station, beginning to transmit from a third base station transmitter for a second cell radio signals digitally modulated with substantially the same message information as the signals from the first and second base station transmitters; . .and.!. .Iadd.combining, in said mobile station, information transmitted by at least two of said first, second and third base station transmitters to reconstruct said message information; and .Iaddend. terminating the transmission from the first base station transmitter while continuing to transmit from the second and third base station transmitters radio signals digitally modulated with substantially the same message information to the mobile station.
Claim 24
Independent Claim
181 words
A method of communication in a cellular mobile radio system having a plurality of base station transmitters and mobile stations comprising the steps of: transmitting, from a first base station transmitter for a first cell, radio signals digitally modulated with message information to a mobile station; transmitting, from a second base station transmitter, radio signals digitally modulated with substantially the same message information to the mobile station; before terminating the transmission from the first or second base station transmitter to the mobile station, beginning to transmit from a third base station transmitter for a second cell radio signals digitally modulated with substantially the same message information as the signals from the first and second base station transmitters; . .and.!. .Iadd.combining, in said mobile station, information transmitted by at least two of said first, second and third base station transmitters to reconstruct said message information; and .Iaddend. terminating the transmission from the first base station transmitter while continuing to transmit from the second and third base station transmitters radio signals digitally modulated with substantially the same message information to the mobile station.
Claim 25
Dependent Claim
41 words
A method according to claim 18 further comprising the step of: terminating the transmission from the second base station transmitter while continuing to transmit from the third base station transmitter radio signals digitally modulated with message information to the mobile station.
Claim 26
Dependent Claim
91 words
A method according to claim 18 further comprising the steps of: before terminating the transmission from the second base station transmitter, beginning to transmit from a fourth base station transmitter to the mobile station radio signals digitally modulated with substantially the same message information as the signals from the second and third base station transmitters; and terminating the transmission from the second base station transmitter while continuing to transmit from the third and fourth base station transmitters radio signals digitally modulated with substantially the same message information to the mobile station.
Claim 27
Independent Claim
117 words
A method of communication in a cellular mobile radio system having a plurality of base station transmitters and mobile stations comprising the steps of: transmitting to a mobile station, from each of a first base station transmitter, a second base station transmitter and a third base station transmitter, radio signals digitally modulated with substantially the same message information; . .and.!. .Iadd.combining, in said mobile station, information transmitted by at least two of said first, second and third base station transmitters to reconstruct said message information; and .Iaddend. terminating the transmission of the digitally modulated signals from the first base station transmitter to the mobile station while continuing to transmit from the second and third base station transmitters..Iadd.
Claim 28
Independent Claim
117 words
A method of communication in a cellular mobile radio system having a plurality of base station transmitters and mobile stations comprising the steps of: transmitting to a mobile station, from each of a first base station transmitter, a second base station transmitter and a third base station transmitter, radio signals digitally modulated with substantially the same message information; . .and.!. .Iadd.combining, in said mobile station, information transmitted by at least two of said first, second and third base station transmitters to reconstruct said message information; and .Iaddend. terminating the transmission of the digitally modulated signals from the first base station transmitter to the mobile station while continuing to transmit from the second and third base station transmitters..Iadd.
Claim 29
Independent Claim
174 words
A method of communication in a cellular mobile radio system having a plurality of base station transmitters and mobile stations comprising the steps of: transmitting, from a first base station transmitter, radio signals digitally modulated with message information to a mobile station; while transmitting the radio signals from the first base station transmitter to the mobile station, beginning to transmit from a second base station transmitter to the mobile station radio signals digitally modulated with substantially the same message information; receiving, at said mobile station, radio signals from both said first and said second base station; performing, at said mobile station, a correlation between said received radio signals and a predetermined pattern; combining, in said mobile station, information transmitted by said first base station transmitter and information transmitted by said second base station transmitter to reconstruct said message information; and terminating the transmission from the first base station transmitter to the mobile station while continuing to transmit from the second base station transmitter radio signals digitally modulated with message information to the mobile station..Iaddend..Iadd.
Claim 30
Independent Claim
174 words
A method of communication in a cellular mobile radio system having a plurality of base station transmitters and mobile stations comprising the steps of: transmitting, from a first base station transmitter, radio signals digitally modulated with message information to a mobile station; while transmitting the radio signals from the first base station transmitter to the mobile station, beginning to transmit from a second base station transmitter to the mobile station radio signals digitally modulated with substantially the same message information; receiving, at said mobile station, radio signals from both said first and said second base station; performing, at said mobile station, a correlation between said received radio signals and a predetermined pattern; combining, in said mobile station, information transmitted by said first base station transmitter and information transmitted by said second base station transmitter to reconstruct said message information; and terminating the transmission from the first base station transmitter to the mobile station while continuing to transmit from the second base station transmitter radio signals digitally modulated with message information to the mobile station..Iaddend..Iadd.
Claim 31
Independent Claim
161 words
A method of communication in a cellular mobile radio system having a plurality of base station transmitters and mobile stations comprising the steps of: transmitting, from a first base station transmitter, radio signals digitally modulated with message information to a mobile station; while transmitting the radio signals from the first base station transmitter to the mobile station, beginning to transmit from a second base station transmitter to the mobile station radio signals digitally modulated with substantially the same message information; combining, in said mobile station, information transmitted by said first base station transmitter and information transmitted by said second base station transmitter using information received from a strongest signal path as well as other signal paths received within a reception window to reconstruct said message information; and terminating the transmission from the first base station transmitter to the mobile station while continuing to transmit from the second base station transmitter radio signals digitally modulated with message information to the mobile station..Iaddend..Iadd.
Claim 32
Independent Claim
161 words
A method of communication in a cellular mobile radio system having a plurality of base station transmitters and mobile stations comprising the steps of: transmitting, from a first base station transmitter, radio signals digitally modulated with message information to a mobile station; while transmitting the radio signals from the first base station transmitter to the mobile station, beginning to transmit from a second base station transmitter to the mobile station radio signals digitally modulated with substantially the same message information; combining, in said mobile station, information transmitted by said first base station transmitter and information transmitted by said second base station transmitter using information received from a strongest signal path as well as other signal paths received within a reception window to reconstruct said message information; and terminating the transmission from the first base station transmitter to the mobile station while continuing to transmit from the second base station transmitter radio signals digitally modulated with message information to the mobile station..Iaddend..Iadd.
Claim 33
Independent Claim
34 words
The method of any one of claims 1, 4, 7, 11, 15, 18, and 21 wherein said step of combining further comprises the step of: using an adaptive equalizer to reconstruct said message information..Iaddend.
References Cited (Backward Citations)
US2745953A
Cited
JPS45882Y1
Cited
DE2022425A1
Cited
US3819872A
Cited
US4057758A
Cited
US4097804A
Cited
US4112257A
Cited
US4255814A
Cited
US4211894A
Cited
US4152647A
Cited
US4222115A
Cited
US4308429A
Cited
DE3012141A1
Cited
EP0040731A1
Cited
US4398063A
Cited
JPS5773539A
Cited
US4383332A
Cited
US4490830A
Cited
EP0072479A2
Cited
EP0072984A1
Cited
JPS58111443A
Cited
JPS58159083A
Cited
US4644560A
Cited
US4516269A
Cited
US4475246A
Cited
US4596042A
Cited
JPS59176935A
Cited
US4633519A
Cited
JPS59212041A
Cited
US4642633A
Cited
JPS6042950A
Cited
JPS6052131A
Cited
US4667202A
Cited
US4697260A
Cited
JPS61171269A
Cited
US4675863A
Cited
US5124698A
Cited
US4670899A
Cited
WO1987001897A1
Cited
JPS62132444A
Cited
US4696052A
Cited
US4696051A
Cited
US4718109A
Cited
US4765753A
Cited
US4715048A
Cited
US4698839A
Cited
US4901307A
Cited
US4737978A
Cited
US4718081A
Cited
US4771448A
Cited
EP0274857B1
Cited
US4723266A
Cited
US4852090A
Cited
US4856048A
Cited
US4759051A
Cited
US5095531A
Cited
US4850032A
Cited
US4955082A
Cited
US4811380A
Cited
US5109528A
Cited
US5048059A
Cited
US4984247A
Cited
US4930140A
Cited
WO1990013187A1
Cited
WO1991007020A1
Cited
US5265119A
Cited
US5267262A
Cited
US5109390A
Cited
US5485486A
Cited
US5056109A
Cited
US5257283A
Cited
US5101501A
Cited
US5022049A
Cited
US5126748A
Cited
US5103459B1
Cited
US5103459A
Cited
US5091942A
Cited
US5513176A
Cited
US5280472A
Cited
US5128959A
Cited
US5179571A
Cited
US5267261A
Cited
US5509035A
Cited
US5437055A
Cited
US5490165A
Cited
US5461639A
Cited
US5383219A
Cited
US5452473A
Cited
US5519761A
Cited
US5475870A
Cited
US5528593A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2002-02-01 | 2002-08-03 | 2003-02-02 | $2000.00 | Window Closed / Lapsed |
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