Patent US5901356A successfully refreshed from Google Patents.
US5901356A
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Channel allocation pattern in a cellular communications system
Assignee: RPX Clearinghouse LLC
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Filing: 1995-07-28
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Granted: 1999-05-04
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Expires: 2015-07-28
Abstract
Abstract A method of allocating channels in a cellular system in which sectored base sites serve subscribers equipped with directional antennas. A plurality of available communication channels is divided into channel subsets. Base sites are arranged in clusters, and within each cluster: the number of channel subsets is equal to the number of base sites, is greater than the number of sectors per base site and is not a multiple of the number of sectors per base site; each channel subset is allocated once in each of the different sector directions; and the allocation pattern is not repeated within the cluster, whereby to minimize co-channel interference.
Inventors
- 👤 John Edward Hudson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:39
CPC Classifications
H; H04; H04W; H04W16/00; H04W16/02; H04W16/12; H04W16/24; H04W28/00; H04W28/16
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
118 words
A method of defining a channel allocation pattern in a cellular communications system in which sectored base sites having sectors pointing in different directions serve directional subscribers, the method including providing a plurality of available channels which is divided into channel subsets and arranging the base sites in clusters wherein within each said cluster: the number of channel subsets is equal to the number of base sites, is greater than the number of sectors per base site and is not a multiple of the number of sectors per base site; each channel subset is allocated once in each of the different sector directions, and; the allocation pattern is not repeated within the cluster, whereby to minimise co-channel interference.
Claim 2
Independent Claim
118 words
A method of defining a channel allocation pattern in a cellular communications system in which sectored base sites having sectors pointing in different directions serve directional subscribers, the method including providing a plurality of available channels which is divided into channel subsets and arranging the base sites in clusters wherein within each said cluster: the number of channel subsets is equal to the number of base sites, is greater than the number of sectors per base site and is not a multiple of the number of sectors per base site; each channel subset is allocated once in each of the different sector directions, and; the allocation pattern is not repeated within the cluster, whereby to minimise co-channel interference.
Claim 3
Dependent Claim
36 words
A method of defining a channel allocation pattern as claimed in claim 1 wherein the channel subsets allocated to the sectors of one base site are a rotation of those applied to an adjacent base site.
Claim 4
Dependent Claim
19 words
A method of defining a channel allocation pattern as claimed in claim 1 wherein the base sites edge-excite cells.
Claim 5
Dependent Claim
46 words
A method of defining a channel allocation pattern as claimed in claim 3 wherein a tessellating pattern of cells, each cell using a different channel subset, is repeated across an area and the sectored base sites are overlaid on this pattern at intersections of the cells.
Claim 6
Dependent Claim
36 words
A method of defining a channel allocation pattern as claimed in claim 3 wherein the base sites are tri-sectored and the clusters comprise four base sites, four channel subsets being used within each of the clusters.
Claim 7
Dependent Claim
36 words
A method of defining a channel allocation pattern as claimed in claim 3 wherein the base sites are tri-sectored and the clusters comprise seven base sites, seven channel subsets being used within each of the clusters.
Claim 8
Dependent Claim
35 words
A method of defining a channel allocation pattern as claimed in claim 4 wherein the base sites are tri-sectored and the clusters comprise four base sites, four channels being used within each of the clusters.
Claim 9
Dependent Claim
35 words
A method of defining a channel allocation pattern as claimed in claim 4 wherein the base sites are tri-sectored and the clusters comprise seven base sites, seven channels being used within each of the clusters.
Claim 10
Dependent Claim
116 words
A cellular communications system in which sectored base sites having sectors pointing in different directions serve directional subscribers, the base sites being arranged in clusters, there being a plurality of available channels which is divided into channel subsets and wherein the pattern of channels allocated within each said cluster is such that: the number of channel subsets is equal to the number of base sites, is greater than the number of sectors per base site and is not a multiple of the number of sectors per base site; each channel subset is allocated once in each of the different sector directions, and; the allocation pattern is not repeated within the cluster, whereby to minimise co-channel interference.
Claim 11
Dependent Claim
116 words
A cellular communications system in which sectored base sites having sectors pointing in different directions serve directional subscribers, the base sites being arranged in clusters, there being a plurality of available channels which is divided into channel subsets and wherein the pattern of channels allocated within each said cluster is such that: the number of channel subsets is equal to the number of base sites, is greater than the number of sectors per base site and is not a multiple of the number of sectors per base site; each channel subset is allocated once in each of the different sector directions, and; the allocation pattern is not repeated within the cluster, whereby to minimise co-channel interference.
Claim 12
Dependent Claim
17 words
A cellular communications system as claimed in claim 9 in which the directional subscribers are fixed subscribers.
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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) | 2002-05-03 | 2002-11-02 | 2003-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-05-03 | 2006-11-02 | 2007-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-05-03 | 2010-11-02 | 2011-05-04 | $7700.00 | Window Closed / Lapsed |