US4726050A — Scanning receiver allocation method and apparatus…

Claim 1

Independent Claim 156 words

A method of scanning receiver allocation in a cellular radiotelephone system consisting of a plurality of remote telephone units at least one of which is engaged in two way commuications with another telephone unit via fixed equipment covering geographically distinct areas by radio, the engaged remote telephone unit requiring a handoff from serving fixed equipment in one area to fixed equipment in another area, comprising the steps of: obtaining a voice channel transceiver identification from at least one link list; determining which voice channel transceiver of the fixed equipment may be available for use as a temporary scanning receiver in an area not serving the engaged remote telephone unit; selecting at least one said available voice channel transceiver; and instructing said selecting voice channel transceiver to tune to a radio frequency currently in use by the engaged remote telephone unit and to measure the received signal strength of the engaged remote unit on said radio frequency.

Claim 2

Independent Claim 156 words

A method of scanning receiver allocation in a cellular radiotelephone system consisting of a plurality of remote telephone units at least one of which is engaged in two way commuications with another telephone unit via fixed equipment covering geographically distinct areas by radio, the engaged remote telephone unit requiring a handoff from serving fixed equipment in one area to fixed equipment in another area, comprising the steps of: obtaining a voice channel transceiver identification from at least one link list; determining which voice channel transceiver of the fixed equipment may be available for use as a temporary scanning receiver in an area not serving the engaged remote telephone unit; selecting at least one said available voice channel transceiver; and instructing said selecting voice channel transceiver to tune to a radio frequency currently in use by the engaged remote telephone unit and to measure the received signal strength of the engaged remote unit on said radio frequency.

Claim 3

Dependent Claim 36 words

A method in accordance with the method of claim 1 further comprising the step of recalling said voice channel transceiver identification from one of at least two reuse lists within said at least one link list.

Claim 4

Dependent Claim 58 words

A method in accordance with the method of claim 2 further comprising the step of returning said voice channel transceiver identification to said one of at least two reuse lists of said at least one link list in accordance with a predetermined radio frequency reuse pattern and an association of said voice channel transceiver with a primary antenna.

Claim 5

Dependent Claim 32 words

A method in accordance with the method of claim 2 further comprising the step of selecting said voice channel transceiver identification from a preferred one of said at least two reuse lists.

Claim 6

Dependent Claim 31 words

A method in accordance with the method of claim 4 wherein said step of selecting said voice channel transceiver identification further comprises the step of selecting on a first-in, first-out basis.

Claim 7

Dependent Claim 28 words

A method in accordance with the method of claim 1 further comprising the step of returning said voice channel transceiver identification to said at least one link list.

Claim 8

Dependent Claim 78 words

A method in accordance with the method of claim 6 wherein said step of returning a voice channel transceiver identification to said in at least one link list further comprises the step of selecting a guard timing link list for said transceiver identification storage if said voice channel transceiver is in a guard timing mode and selecting an idle channel link list for said transceiver identification storage if said voice channel transceiver is in an idle channel mode.

Claim 9

Dependent Claim 43 words

A method in accordance with the method of claim 1 wherein said step of selecting at least one available voice channel transceiver further comprises the step of obtaining a representation of available voice channel transceivers in areas not serving the engaged remote unit.

Claim 10

Dependent Claim 35 words

A method in accordance with the method of claim 8 further comprising the step of mapping said obtained representation into one of a plurality of predeterminedly selected geographic area patterns of available voice channel transceivers.

Claim 11

Dependent Claim 55 words

A method in accordance with the method of claim 1 further comprising the step of aborting said step of instructing said at least one selected voice channel transceiver to tune to a radio frequency if said selected voice channel transceiver were simultaneously selected to serve a second remote telephone unit as a voice channel transceiver.

Claim 12

Dependent Claim 180 words

A base site controller for a cellular radiotelephone system which consists of a plurality of remote telephone units at least one of which may be engaged in two way communications with another telephone unit via fixed equipment, including at least one base site controller and a plurality of voice channel transceivers, covering geographically distinct areas by radio, the engaged remote telephone unit requiring a handoff from serving fixed equipment in one area to fixed equipment in another area, the base site controller comprising: means for obtaining a voice channel transceiver identification from at least one link list; means for determining which voice channel transceivers may be available for use as a temporary scanning receiver in at least one area not serving the engaged remote telephone unit; means for selecting at least one said available voice channel transceiver; and means for instructing said at least one selected voice channel transceiver to tune to a radio frequency currently in use by the engaged remote telephone unit and to measure the received signal strength of the engaged remote unit on said radio frequency.

Claim 13

Dependent Claim 180 words

A base site controller for a cellular radiotelephone system which consists of a plurality of remote telephone units at least one of which may be engaged in two way communications with another telephone unit via fixed equipment, including at least one base site controller and a plurality of voice channel transceivers, covering geographically distinct areas by radio, the engaged remote telephone unit requiring a handoff from serving fixed equipment in one area to fixed equipment in another area, the base site controller comprising: means for obtaining a voice channel transceiver identification from at least one link list; means for determining which voice channel transceivers may be available for use as a temporary scanning receiver in at least one area not serving the engaged remote telephone unit; means for selecting at least one said available voice channel transceiver; and means for instructing said at least one selected voice channel transceiver to tune to a radio frequency currently in use by the engaged remote telephone unit and to measure the received signal strength of the engaged remote unit on said radio frequency.

Claim 14

Dependent Claim 41 words

A base site controller in accordance with claim 11 wherein said means for recalling further comprises second means for recalling said voice channel transceiver identification from one of at least two reuse lists in within said at least one link list.

Claim 15

Dependent Claim 61 words

A base site controller in accordance with claim 12 wherein said means for determining further comprises means for returning said voice channel transceiver identification to said one of at least two reuse lists of said at least one link list in accordance with a predetermined radio frequency reuse pattern and an association of said voice channel transceiver with a primary antenna.

Claim 16

Dependent Claim 37 words

A base site controller in accordance with claim 12 wherein said first means for recalling further comprises third means for recalling said voice channel transceiver identification from a preferred one of said at least two reuse lists.

Claim 17

Dependent Claim 31 words

A base site controller in accordance with claim 14 wherein said third means for recalling said voice channel transceiver identification further comprises fourth means for recalling on a first-in, first-out basis.

Claim 18

Dependent Claim 76 words

A base site controller in accordance with claim 11 wherein said first means for recalling a voice channel transceiver identification in at least one link list further comprises means for selecting a guard timing link list for said transceiver identification storage if said voice channel transceiver is in a guard timing mode and for selecting an idle channel link list for said transceiver identification storage if said voice channel transceiver is in an idle channel mode.

Claim 19

Dependent Claim 41 words

A base site controller in accordance with claim 11 wherein said means for selecting at least one available voice channel transceiver further comprises means for obtaining a representation of available voice channel transceivers in areas not serving the engaged remote unit.

Claim 20

Dependent Claim 33 words

A base site controller in accordance with claim 17 further comprising means for mapping said obtained representation into one of a plurality of predeterminedly selected geographic area patterns of available voice channel transceivers.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1991-02-15	1991-08-17	1992-02-16	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1995-02-15	1995-08-17	1996-02-16	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1999-02-15	1999-08-17	2000-02-16	$7700.00	Window Closed / Lapsed

Scanning receiver allocation method and apparatus for cellular radiotelephone systems

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