US5890067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-beam antenna arrays for base stations in which the channel follows the mobile unit
Assignee: Microsoft Technology Licensing LLC
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Filing: 1996-06-26
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Granted: 1999-03-30
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Expires: 2016-06-26
Abstract
Abstract Cells in a radio telephone scheme are covered by beam-spots generated by multi-beam antenna system. Forward communication channels follow mobile units as they move between beam-spots. Additionally, each cell is divided into zones based on the mobile traffic patterns within the cell. Typically, there will be a high density zone covered by many, small area beam-spots, a medium density zone covered by two or three medium sized beam-spots, and a low density zone covered by one large beam-spot. As the mobile traffic patterns change throughout the day, multi-beam antenna dynamically reconfigures the zone and beam-spot layout for each cell, thereby keeping a nearly optimal zone and beam-spot configuration despite varying mobile traffic patterns.
Inventors
- 👤 Chu Rui Chang
- 👤 Hua Jiang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:56
CPC Classifications
H; H04; H04W; H04W16/00; H04W16/24; H04W16/28; H04W16/02; H04W16/04
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
101 words
A method of communicating between a base station and a mobile unit located within a cell of a cellular communication system comprising the steps of: radiating an array of geographically spaced beam-spots within the cell, each of said beam-spots having a plurality of communication channels and at least one of the communication channels being assigned to the mobile unit; sensing, at the base station, received signal strength of the mobile unit communicating in the cell; and radiating the communication channels assigned to the mobile unit to a selected number of beam-spots based on the received signal strength from the mobile unit.
Claim 2
Independent Claim
101 words
A method of communicating between a base station and a mobile unit located within a cell of a cellular communication system comprising the steps of: radiating an array of geographically spaced beam-spots within the cell, each of said beam-spots having a plurality of communication channels and at least one of the communication channels being assigned to the mobile unit; sensing, at the base station, received signal strength of the mobile unit communicating in the cell; and radiating the communication channels assigned to the mobile unit to a selected number of beam-spots based on the received signal strength from the mobile unit.
Claim 3
Dependent Claim
23 words
The method of claim 1, including the step of selecting the number of beam-spots based on a dwell time of the mobile unit.
Claim 4
Dependent Claim
18 words
The method of claim 1, wherein the selected beam-spots are determined according to the greatest received signal strength.
Claim 5
Dependent Claim
25 words
The method of communicating as defined in claim 1, wherein the method of communicating is applied to a plurality of cells arranged in a network.
Claim 6
Dependent Claim
37 words
The method of claim 1, the step of radiating an array of geographically spaced beam-spots includes the substep of rearranging the array of geographically spaced beam-spots based on a traffic pattern of mobile units within the cell.
Claim 7
Independent Claim
150 words
A method of communicating with a mobile unit in a cell of a radio telephone system, comprising the steps of: radiating an array of geographically spaced beam-spots, each of said beam-spots having a plurality of communication channels; selectively activating at least one channel, within each beam-spot, assigned to mobile units using the telephone system, the step of selectively activating including the substep of deactivating the channels assigned to the mobile unit in a first one of the beam-spots which the mobile unit has left and activating the channels in a second one of the beam-spots being entered by the mobile unit; monitoring traffic patterns in the cell; determining, based on the monitoring step, whether the traffic patterns have changed by more than a predetermined amount; controlling a multi-beam antenna array to reform the beam-spots in accordance with a change in traffic patterns if the change has exceeded the predetermined amount.
Claim 8
Independent Claim
150 words
A method of communicating with a mobile unit in a cell of a radio telephone system, comprising the steps of: radiating an array of geographically spaced beam-spots, each of said beam-spots having a plurality of communication channels; selectively activating at least one channel, within each beam-spot, assigned to mobile units using the telephone system, the step of selectively activating including the substep of deactivating the channels assigned to the mobile unit in a first one of the beam-spots which the mobile unit has left and activating the channels in a second one of the beam-spots being entered by the mobile unit; monitoring traffic patterns in the cell; determining, based on the monitoring step, whether the traffic patterns have changed by more than a predetermined amount; controlling a multi-beam antenna array to reform the beam-spots in accordance with a change in traffic patterns if the change has exceeded the predetermined amount.
Claim 9
Dependent Claim
29 words
The method of claim 6, wherein the step of monitoring further includes the step of sensing the traffic load by monitoring the number of active channels in the beam-spots.
Claim 10
Dependent Claim
20 words
The method according to claim 7, wherein the determination step includes the substep of analyzing changes in average mobile density.
Claim 11
Dependent Claim
25 words
The method of communicating as defined in claim 6, wherein the method of communicating is applied to a plurality of cells arranged in a network.
Claim 12
Independent Claim
132 words
A method of communicating with a mobile unit in a cell of a radio telephone system comprising the steps of: radiating an array of geographically spaced beam-spots, each of said beam-spots having a plurality of communication channels; selectively activating at least one channel, within each beam-spot, assigned to mobile units using the telephone system, the step of selectively activating including the substep of deactivating channels associated with beam-spots the mobile unit has passed and activating channels the mobile unit is estimated to enter; monitoring traffic patterns in the cell; determining, based on the monitoring step, whether the traffic patterns have changed by more than a predetermined amount; controlling a multi-beam antenna array to reform the beam-spots in accordance with a change in traffic patterns if the change has exceeded the predetermined amount.
Claim 13
Independent Claim
132 words
A method of communicating with a mobile unit in a cell of a radio telephone system comprising the steps of: radiating an array of geographically spaced beam-spots, each of said beam-spots having a plurality of communication channels; selectively activating at least one channel, within each beam-spot, assigned to mobile units using the telephone system, the step of selectively activating including the substep of deactivating channels associated with beam-spots the mobile unit has passed and activating channels the mobile unit is estimated to enter; monitoring traffic patterns in the cell; determining, based on the monitoring step, whether the traffic patterns have changed by more than a predetermined amount; controlling a multi-beam antenna array to reform the beam-spots in accordance with a change in traffic patterns if the change has exceeded the predetermined amount.
Claim 14
Dependent Claim
29 words
The method of claim 10, wherein the step of monitoring further includes the step of sensing the traffic load by monitoring the number of active channels in the beam-spots.
Claim 15
Dependent Claim
21 words
The method according to claim 10, wherein the determination step includes the substep of analyzing changes in average mobile unit density.
Claim 16
Dependent Claim
29 words
The method of claim 10, wherein the substep of analyzing which beam-spot the mobile unit will enter includes the substep of detecting a previous direction of the mobile unit.
Claim 17
Dependent Claim
25 words
The method of communicating as defined in claim 10, wherein the method of communicating is applied to a plurality of cells arranged in a network.
Claim 18
Dependent Claim
77 words
A radio-based telephone system comprising: an adaptive antenna array for providing reconfigurable beam-spots within a predefined area, each beam-spot containing one or more channels assigned to mobile units using the telephone system; and control means for selectively activating the channels to deactivate the channel assigned to the mobile unit when a mobile unit exits a first beam-spot and to activate the channel assigned to the mobile unit when the mobile unit enters a second of the beam-spots.
Claim 19
Dependent Claim
77 words
A radio-based telephone system comprising: an adaptive antenna array for providing reconfigurable beam-spots within a predefined area, each beam-spot containing one or more channels assigned to mobile units using the telephone system; and control means for selectively activating the channels to deactivate the channel assigned to the mobile unit when a mobile unit exits a first beam-spot and to activate the channel assigned to the mobile unit when the mobile unit enters a second of the beam-spots.
Claim 20
Dependent Claim
15 words
The telephone system of claim 15, further including receivers for determining the exiting and entering.
Claim 21
Dependent Claim
41 words
The telephone system of claim 16, wherein the receivers further include means for measuring signal strength from the mobile units, and wherein the control means includes means for activating the channel assigned to the mobile unit based on the strongest signal.
Claim 22
Dependent Claim
145 words
A cell in a radio telephone network comprising: base station means for controlling mobile unit telephone traffic in a cell, the base station including: means for dividing the cell into zones arranged according to the number and location of mobile units within the cell, one of the zones being a high capacity zone, and one of the zones being a lower capacity zone; means for covering the zones with beam-spots, the number of beam-spots and the size of each beam-spot within the zones being determined according to traffic patterns of the mobile units within the zones; wherein the means for dividing further includes means for reconfiguring the zones based on a change in the traffic patterns within the cell and the means for covering including means for reconfiguring the beam-spots based on a change in the traffic patterns of the mobile units within the zones.
Claim 23
Dependent Claim
145 words
A cell in a radio telephone network comprising: base station means for controlling mobile unit telephone traffic in a cell, the base station including: means for dividing the cell into zones arranged according to the number and location of mobile units within the cell, one of the zones being a high capacity zone, and one of the zones being a lower capacity zone; means for covering the zones with beam-spots, the number of beam-spots and the size of each beam-spot within the zones being determined according to traffic patterns of the mobile units within the zones; wherein the means for dividing further includes means for reconfiguring the zones based on a change in the traffic patterns within the cell and the means for covering including means for reconfiguring the beam-spots based on a change in the traffic patterns of the mobile units within the zones.
Claim 24
Dependent Claim
16 words
The cell of claim 18, further comprising a plurality of base stations arranged in a network.
Claim 25
Dependent Claim
57 words
The cell of claim 18, further including control means for selectively activating channels assigned to the mobile units to deactivate the channels assigned to a mobile unit when the mobile unit exits a first of the beam-spots and to activate the channels assigned to the mobile unit when the mobile unit enters a second of the beam-spots.
Claim 26
Independent Claim
124 words
A method of communicating with mobile units in a cell of a radio telephone system, comprising the steps of: dividing the cell into zones arranged according to a number and location of mobile units within the cell, one of the zones being a high capacity zone, and one of the zones being a lower capacity zone; covering the zones with beam-spots, the number of beam-spots and the size of each beam-spot within the zones being determined according to traffic patterns of the mobile units within the zones; reconfiguring the zones based on a change in the traffic patterns of the mobile units within the cell and reconfiguring the beam-spots based on a change in the traffic patterns of the mobile units within the zones.
Claim 27
Independent Claim
124 words
A method of communicating with mobile units in a cell of a radio telephone system, comprising the steps of: dividing the cell into zones arranged according to a number and location of mobile units within the cell, one of the zones being a high capacity zone, and one of the zones being a lower capacity zone; covering the zones with beam-spots, the number of beam-spots and the size of each beam-spot within the zones being determined according to traffic patterns of the mobile units within the zones; reconfiguring the zones based on a change in the traffic patterns of the mobile units within the cell and reconfiguring the beam-spots based on a change in the traffic patterns of the mobile units within the zones.
Claim 28
Dependent Claim
57 words
The method of claim 21, further including the step of selectively activating channels assigned to the mobile units to deactivate the channels assigned to a mobile unit when the mobile unit exits a first of the beam-spots and to activate the channels assigned to the mobile unit when the mobile unit enters a second of the beam-spots.
Claim 29
Dependent Claim
24 words
The method of claim 21, the step of reconfiguring the zones and the step of reconfiguring the beam-spots being based on previous traffic patterns.
References Cited (Backward Citations)
US5095531A
Cited
US5109528A
Cited
JPH02180438A
Cited
US5140695A
Cited
GB2242806A
Cited
US5265263A
Cited
US5276907A
Cited
US5504937A
Cited
WO1992016061A1
Cited
US5392453A
Cited
EP0562743A1
Cited
US5345499A
Cited
US5396645A
Cited
EP0589279A2
Cited
US5457810A
Cited
US5423066A
Cited
US5339086A
Cited
US5499395A
Cited
EP0647978A2
Cited
US5714957A
Cited
WO1995028813A1
Cited
US5649293A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-03-29 | 2002-09-28 | 2003-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-03-29 | 2006-09-28 | 2007-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-03-29 | 2010-09-28 | 2011-03-30 | $7700.00 | Window Closed / Lapsed |