US5301188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shared-carrier frequency hopping
Assignee: Motorola Solutions Inc
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Filing: 1992-08-10
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Granted: 1994-04-05
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Expires: 2012-08-10
Abstract
Abstract In a TDMA cellular network, there is provided a mechanism for shared-carrier frequency-hopping. It comprises: allocating on a frame basis within a reuse diameter to one coverage area during certain timeslot(s) at least one from a pool of TDM-frame-hopped carriers and allocating on a frame basis within that carrier reuse diameter to another coverage area during certain other, substantially non-overlapping timeslot(s) that frame-hopped carrier, all in substantially non-interfering time-synchronism with any proximal reuse of that carrier, whereby the advantages of frequency hopping are obtained. Stated differently, it comprises: at one instant in time, allocating within a reuse diameter to one coverage area at least one of a plurality of hopped carriers and at that same instant in time, allocating within that carrier reuse diameter to another coverage area another of that plurality of hopped carriers, all in time-synchronism with any proximal reuse of that carrier. The control and access carriers may also be included in the hopping pool, causing certain timeslots to be hopped on a sequence different from the others. The pool of hopped carriers is further apportioned among co-located sites into hopping groups, thereby reducing intra-system synchronization requirements. To solve the near/far problem, TDM timeslots bordering hopping boundaries are preferentially allocated to less distant mobile users.
Inventors
- 👤 Michael D. Kotzin
- 👤 Stephen L. Spear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:45
CPC Classifications
H; H04; H04J; H04J4/00; H04W; H04W16/00; H04W16/02; H04W16/12; H04B; H04B7/00; H04B7/24; H04B7/26; H04B7/2621; H04J13/00; H04W16/24
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
51 words
A method of shared-carrier frequency-hopping comprising: allocating to a first coverage area within a carrier reuse diameter, during a first time interval, a first carrier of a plurality of hopped carriers; and allocating within said carrier reuse diameter to a second coverage area, during a second time interval, said first carrier.
Claim 2
Independent Claim
51 words
A method of shared-carrier frequency-hopping comprising: allocating to a first coverage area within a carrier reuse diameter, during a first time interval, a first carrier of a plurality of hopped carriers; and allocating within said carrier reuse diameter to a second coverage area, during a second time interval, said first carrier.
Claim 3
Independent Claim
60 words
A method of shared-carrier frequency-hopping comprising: regularly allocating to a first coverage area within a carrier reuse diameter, during a first time interval, one carrier from a pool of hopped carriers; and regularly allocating within said carrier reuse diameter to a second coverage area, during a second time interval, said first carrier, whereby the advantages of frequency hopping are obtained.
Claim 4
Independent Claim
60 words
A method of shared-carrier frequency-hopping comprising: regularly allocating to a first coverage area within a carrier reuse diameter, during a first time interval, one carrier from a pool of hopped carriers; and regularly allocating within said carrier reuse diameter to a second coverage area, during a second time interval, said first carrier, whereby the advantages of frequency hopping are obtained.
Claim 5
Independent Claim
69 words
A method of shared-carrier frequency-hopping comprising: allocating to a first coverage area on a frame basis within a carrier reuse diameter, during a first TDM timeslot, a first TDM-frame-hopped carrier from a pool of TDM-frame-hopped carriers; and allocating on a frame basis within said carrier reuse diameter to a second coverage area, during a second TDM timeslot, said first TDM-frame-hopped carrier, whereby the advantages of frequency hopping are obtained.
Claim 6
Independent Claim
69 words
A method of shared-carrier frequency-hopping comprising: allocating to a first coverage area on a frame basis within a carrier reuse diameter, during a first TDM timeslot, a first TDM-frame-hopped carrier from a pool of TDM-frame-hopped carriers; and allocating on a frame basis within said carrier reuse diameter to a second coverage area, during a second TDM timeslot, said first TDM-frame-hopped carrier, whereby the advantages of frequency hopping are obtained.
Claim 7
Dependent Claim
21 words
A method as claimed in claim 2 above, wherein control and access carriers comprise part of the pool of hopped carriers.
Claim 8
Dependent Claim
26 words
A method as claimed in claim 2 above, wherein certain time intervals of control and access carriers are hopped on a sequence different from the others.
Claim 9
Dependent Claim
22 words
A method as claimed in claim 2 above, wherein the pool of hopped carriers is apportioned among co-located sites into hopping groups.
Claim 10
Dependent Claim
39 words
A method as claimed in claim 2 above, wherein the number of carriers per coverage area made available for hopping through pooling exceeds the number that would be available per coverage area if allocated fixedly to that coverage area.
Claim 11
Dependent Claim
25 words
A method as claimed in claim 2 above, wherein hopping carriers over fixed carriers are preferentially allocated to those mobile users experiencing deteriorating signal conditions.
Claim 12
Dependent Claim
25 words
A method as claimed in claim 3 above, wherein at least one TDM timeslot not bordering hopping boundaries is preferentially allocated to distant mobile users.
Claim 13
Dependent Claim
22 words
A method as claimed in claim 3 above, wherein TDM timeslots bordering hopping boundaries are preferentially allocated to less distant mobile users.
Claim 14
Dependent Claim
23 words
A method as claimed in claim 3 above, wherein TDM timeslots bordering TDM frame boundaries are preferentially allocated to less distant mobile users.
Claim 15
Dependent Claim
25 words
A method as claimed in claim 3 above, wherein certain timeslots of control and access carriers are hopped on a sequence different from the others.
Claim 16
Independent Claim
56 words
An apparatus for shared-carrier frequency-hopping comprising: means for allocating to a first coverage area within a carrier reuse diameter, during a first time interval, a first of a plurality of hopped carriers operatively coupled with means for allocating within said carrier reuse diameter to a second coverage area, during a second time interval, said first carrier.
Claim 17
Independent Claim
56 words
An apparatus for shared-carrier frequency-hopping comprising: means for allocating to a first coverage area within a carrier reuse diameter, during a first time interval, a first of a plurality of hopped carriers operatively coupled with means for allocating within said carrier reuse diameter to a second coverage area, during a second time interval, said first carrier.
Claim 18
Independent Claim
66 words
An apparatus for shared-carrier frequency-hopping comprising: means for regularly allocating to a first coverage area within a carrier reuse diameter, during a first time interval, one carrier from a pool of hopped carriers operatively coupled with means for regularly allocating within said carrier reuse diameter to a second coverage area, during a second time interval, said first carrier, whereby the advantages of frequency hopping are obtained.
Claim 19
Independent Claim
66 words
An apparatus for shared-carrier frequency-hopping comprising: means for regularly allocating to a first coverage area within a carrier reuse diameter, during a first time interval, one carrier from a pool of hopped carriers operatively coupled with means for regularly allocating within said carrier reuse diameter to a second coverage area, during a second time interval, said first carrier, whereby the advantages of frequency hopping are obtained.
Claim 20
Independent Claim
74 words
An apparatus for shared-carrier frequency-hopping comprising: means for allocating to a first coverage area on a frame basis within a reuse diameter, during a first TDM timeslot, a first TDM-frame-hopped carrier from a pool of TDM-frame-hopped carriers operatively coupled with means for allocating on a frame basis within said carrier reuse diameter to a second coverage area, during a second TDM timeslot, said first TDM-frame-hopped carrier, whereby the advantages of frequency hopping are obtained.
Claim 21
Independent Claim
74 words
An apparatus for shared-carrier frequency-hopping comprising: means for allocating to a first coverage area on a frame basis within a reuse diameter, during a first TDM timeslot, a first TDM-frame-hopped carrier from a pool of TDM-frame-hopped carriers operatively coupled with means for allocating on a frame basis within said carrier reuse diameter to a second coverage area, during a second TDM timeslot, said first TDM-frame-hopped carrier, whereby the advantages of frequency hopping are obtained.
Claim 22
Dependent Claim
25 words
An apparatus as claimed in claim 14 above, wherein certain time intervals of control and access carriers comprise part of the pool of hopped carriers.
Claim 23
Dependent Claim
23 words
An apparatus as claimed in claim 14 above, wherein pooled control and access carriers are hopped on a sequence different from the others.
Claim 24
Dependent Claim
22 words
An apparatus as claimed in claim 14 above, wherein the pool of hopped carriers is apportioned among co-located sites into hopping groups.
Claim 25
Dependent Claim
39 words
An apparatus as claimed in claim 14 above, wherein the number of carriers per coverage area made available for hopping through pooling exceeds the number that would be available per coverage area if allocated fixedly to that coverage area.
Claim 26
Dependent Claim
25 words
An apparatus as claimed in claim 15 above, wherein at least one TDM timeslot not bordering hopping boundaries is preferentially allocated to distant mobile users.
Claim 27
Dependent Claim
22 words
An apparatus as claimed in claim 15 above, wherein TDM timeslots bordering hopping boundaries are preferentially allocated to less distant mobile users.
Claim 28
Dependent Claim
23 words
An apparatus as claimed in claim 15 above, wherein TDM timeslots bordering TDM frame boundaries are preferentially allocated to less distant mobile users.
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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) | 1997-04-04 | 1997-10-04 | 1998-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-04-04 | 2001-10-04 | 2002-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-04-04 | 2005-10-04 | 2006-04-05 | $7700.00 | Window Closed / Lapsed |