Patent US5493696A successfully refreshed from Google Patents.
US5493696A
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Method for locating a subscriber unit that is in close proximity to a requesting subscriber unit in a wide area communication system
Assignee: Google Technology Holdings LLC
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Filing: 1994-05-31
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Granted: 1996-02-20
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Expires: 2014-05-31
Abstract
Abstract In a wide area communication system that includes a central controller, a plurality of sites, and a plurality of subscriber units, a requesting subscriber unit can locate a neighboring subscriber unit in the following manner. Each of the plurality of subscriber units registers with the central controller. The central controller stores registration information in a database. When the requesting subscriber unit transmits a request for a subscriber identification of a neighboring subscriber unit, the central controller determines whether the neighboring subscriber unit exists. When the neighboring subscriber unit exists, the central controller transmits the subscriber identification of the neighboring subscriber unit to the requesting subscriber unit.
Inventors
- 👤 Herbert R. Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:27
CPC Classifications
H; H04; H04W; H04W8/00; H04W8/005; H04W4/00; H04W4/02; H04W4/06; H04W4/08
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
152 words
In a wide area communication system that includes a central controller, a plurality of sites, and a plurality of subscriber units each having a respective subscriber identification, a method of locating at least one neighboring subscriber unit, the method comprising the steps of: registering, by the plurality of subscriber units in the wide area communication system, with the central controller, by providing registration information; storing in a database, by the central controller, the registration information; transmitting, by a requesting subscriber unit to the central controller, a request for a subscriber identification of at least one neighboring subscriber unit; upon receipt of the request, determining, by the central controller, based on the request, whether the at least one neighboring subscriber unit exists; and when the at least one neighboring subscriber unit exists, transmitting by the central controller, the subscriber identification of the at least one neighboring subscriber unit, to the requesting subscriber unit.
Claim 2
Dependent Claim
152 words
In a wide area communication system that includes a central controller, a plurality of sites, and a plurality of subscriber units each having a respective subscriber identification, a method of locating at least one neighboring subscriber unit, the method comprising the steps of: registering, by the plurality of subscriber units in the wide area communication system, with the central controller, by providing registration information; storing in a database, by the central controller, the registration information; transmitting, by a requesting subscriber unit to the central controller, a request for a subscriber identification of at least one neighboring subscriber unit; upon receipt of the request, determining, by the central controller, based on the request, whether the at least one neighboring subscriber unit exists; and when the at least one neighboring subscriber unit exists, transmitting by the central controller, the subscriber identification of the at least one neighboring subscriber unit, to the requesting subscriber unit.
Claim 3
Dependent Claim
39 words
The method of claim 1 further including the step of: when the at least one neighboring subscriber unit does not exist, transmitting, by the central controller, information indicating that the at least one neighboring subscriber unit does not exist.
Claim 4
Dependent Claim
79 words
The method of claim 1 wherein the step of determining whether the at least one neighboring subscriber unit exists further includes the steps of: searching the database for possible neighboring subscriber units based on the request; reviewing the registration information of each registered subscriber unit; and when the registration information of at least one of the registered subscriber units indicates a possible neighboring subscriber unit, identifying the possible neighboring subscriber unit as the at least one neighboring subscriber unit.
Claim 5
Dependent Claim
58 words
The method of claim 1 further including the steps of: upon receipt of the subscriber identification of the at least one neighboring subscriber unit, selecting, by the requesting subscriber unit, one of the at least one neighboring subscriber units to produce a selected neighboring subscriber unit; and contacting, by the requesting subscriber unit, the selected neighboring subscriber unit.
Claim 6
Dependent Claim
33 words
The method of claim 1 wherein the request specifies identification of at least one registered neighboring subscriber unit having a site affiliation that substantially matches a site affiliation of the requesting subscriber unit.
Claim 7
Dependent Claim
47 words
The method of claim 1 wherein the request specifies identification of at least one registered neighboring subscriber unit having a site affiliation that substantially matches a site affiliation of the requesting subscriber unit or a site affiliation adjacent to the site affiliation of the requesting subscriber unit.
Claim 8
Dependent Claim
17 words
The method of claim 1, wherein the registration information includes subscriber id, site affiliation, and affiliation status.
Claim 9
Dependent Claim
79 words
The method of claim 7 wherein the step of determining whether the at least one neighboring subscriber unit exists further includes the steps of: searching the database for possible neighboring subscriber units based on the request; reviewing the affiliation status of each registered subscriber unit; and when the affiliation status of at least one of the registered subscriber units indicates a possible neighboring subscriber unit, identifying the possible neighboring subscriber unit as the at least one neighboring subscriber unit.
Claim 10
Dependent Claim
13 words
The method of claim 7, wherein the registration information further includes talkgroup id.
Claim 11
Dependent Claim
23 words
The method of claim 9 wherein the request specifies identification of at least one registered neighboring subscriber unit having a specific talkgroup id.
Claim 12
Dependent Claim
33 words
The method of claim 9 wherein the request specifies identification of at least one registered neighboring subscriber unit having a talkgroup id that substantially matches one of a specific set of talkgroup ids.
Claim 13
Dependent Claim
132 words
In a wide area communication system that includes a central controller, a plurality of sites, and a plurality of subscriber units each having a respective subscriber identification, a method for the central controller to locate at least one neighboring subscriber unit of a requesting subscriber unit, the method comprising the steps of: receiving registration information from registering subscriber units to produce received registration information; storing the received registration information in a database; receiving a request from a requesting subscriber unit, for a subscriber identification of at least one neighboring subscriber unit; determining, based on the request, whether the at least one neighboring subscriber unit exists; and when the at least one neighboring subscriber unit exists, transmitting to the requesting subscriber unit, the Subscriber identification of the at least one neighboring subscriber unit.
Claim 14
Dependent Claim
132 words
In a wide area communication system that includes a central controller, a plurality of sites, and a plurality of subscriber units each having a respective subscriber identification, a method for the central controller to locate at least one neighboring subscriber unit of a requesting subscriber unit, the method comprising the steps of: receiving registration information from registering subscriber units to produce received registration information; storing the received registration information in a database; receiving a request from a requesting subscriber unit, for a subscriber identification of at least one neighboring subscriber unit; determining, based on the request, whether the at least one neighboring subscriber unit exists; and when the at least one neighboring subscriber unit exists, transmitting to the requesting subscriber unit, the Subscriber identification of the at least one neighboring subscriber unit.
Claim 15
Dependent Claim
40 words
The method of claim 12 further including the step of: when the at least one neighboring subscriber unit does not exist, transmitting to the requesting subscriber unit, information indicating that the at least one neighboring subscriber unit does not exist.
Claim 16
Dependent Claim
77 words
The method of claim 12 wherein the step of determining whether the at least one neighboring subscriber unit exists further includes the steps of: searching the database for possible neighboring subscriber units based on the request; reviewing registration information of registered subscriber units; and when the registration information of at least one of the registered subscriber units indicates a possible neighboring subscriber unit, identifying the possible neighboring subscriber unit as the at least one neighboring subscriber unit.
Claim 17
Dependent Claim
50 words
The method of claim 12 further including the steps of: selecting, by the central controller, one of the at least one neighboring subscriber units to produce a selected neighboring subscriber unit; and initiating, by the central controller, a call between the requesting subscriber unit and the selected neighboring subscriber unit.
Claim 18
Dependent Claim
17 words
The method of claim 12, wherein the registration information includes subscriber id, site affiliation, and affiliation status.
Claim 19
Dependent Claim
13 words
The method of claim 16 wherein the registration information further includes talkgroup id.
Claim 20
Dependent Claim
77 words
The method of claim 16 wherein the step of determining whether the at least one neighboring subscriber unit exists further includes the steps of: searching the database for possible neighboring subscriber units based on the request; reviewing affiliation status of registered subscriber units; and when the affiliation status of at least one of the registered subscriber units indicates a possible neighboring subscriber unit, identifying the possible neighboring subscriber unit as the at least one neighboring subscriber unit.
Claim 21
Dependent Claim
121 words
In a wide area communication system that includes a central controller, a plurality of sites, and a plurality of subscriber units each having a respective subscriber identification, a method for a requesting subscriber unit of the plurality of subscriber units to locate at least one neighboring subscriber unit, the method comprising the steps of: transmitting, by the plurality of subscriber units, registration information to the central controller; transmitting, by the requesting subscriber unit, a request to the central controller for a subscriber identification of at least one neighboring subscriber unit; and when the at least one neighboring subscriber unit exists, receiving, by the requesting subscriber unit from the central controller, the subscriber identification of the at least one neighboring subscriber unit.
Claim 22
Dependent Claim
121 words
In a wide area communication system that includes a central controller, a plurality of sites, and a plurality of subscriber units each having a respective subscriber identification, a method for a requesting subscriber unit of the plurality of subscriber units to locate at least one neighboring subscriber unit, the method comprising the steps of: transmitting, by the plurality of subscriber units, registration information to the central controller; transmitting, by the requesting subscriber unit, a request to the central controller for a subscriber identification of at least one neighboring subscriber unit; and when the at least one neighboring subscriber unit exists, receiving, by the requesting subscriber unit from the central controller, the subscriber identification of the at least one neighboring subscriber unit.
Claim 23
Dependent Claim
44 words
The method of claim 19 further including the step of: when the at least one neighboring subscriber unit does not exist, receiving, by the requesting subscriber unit from the central controller, information indicating that the at least one neighboring subscriber unit does not exist.
Claim 24
Dependent Claim
58 words
The method of claim 19 further including the steps of: upon receipt of the subscriber identification of the at least one neighboring subscriber unit, selecting, by the requesting subscriber unit, one of the at least one neighboring subscriber units to produce a selected neighboring subscriber unit; and contacting, by the requesting subscriber unit, the selected neighboring subscriber unit.
Claim 25
Dependent Claim
31 words
The method of claim 19 wherein the request specifies identification of at least one neighboring subscriber unit having a site affiliation that substantially matches site affiliation of the requesting subscriber unit.
Claim 26
Dependent Claim
45 words
The method of claim 19 wherein the request specifies identification of at least one neighboring subscriber unit having a site affiliation that substantially matches site affiliation of the requesting subscriber unit or a site affiliation adjacent to the site affiliation of the requesting subscriber unit.
Claim 27
Dependent Claim
17 words
The method of claim 19, wherein the registration information includes subscriber id, site affiliation, and affiliation status.
Claim 28
Dependent Claim
13 words
The method of claim 24, wherein the registration information further includes talkgroup id.
Claim 29
Dependent Claim
22 words
The method of claim 25 wherein the request specifies identification of at least one neighboring subscriber unit having a specific talkgroup id.
Claim 30
Dependent Claim
32 words
The method of claim 25 wherein the request specifies identification of at least one neighboring subscriber unit having a talkgroup id that substantially matches one of a specific set of talkgroup ids.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-02-19 | 1999-08-21 | 2000-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-19 | 2003-08-21 | 2004-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-02-19 | 2007-08-21 | 2008-02-20 | $7700.00 | Window Closed / Lapsed |