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EP0700226A2
Expired / Lapsed
EP
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Method and apparatus for atomatically selecting a radio talkgroup
Assignee: Motorola Solutions Inc
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Filing: 1995-08-17
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Granted: —
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Expires: 2015-08-17
Abstract
Abstract A communication system (100) has automatic selection of talkgroups based on geographically defined areas. The system (100) includes wireless two-way communication units (120) capable of communicating with each other within a coverage area 205. A particular communication unit 120 is automatically caused to operate as a member of a particular talkgroup when that particular communication unit (120) is within a particular area of operation (207), which particular area of operation (207) is smaller than, and contained within, the coverage area (205).
Inventors
- 👤 Larry M. Peterson
- 👤 Timothy J. Sherburne
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 23:07
CPC Classifications
H; H04; H04W; H04W84/00; H04W84/02; H04W84/04; H04W84/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
77 words
A method comprising the steps of: providing a plurality of wireless two-way communication units capable of communicating with one another within a first area of operation; and automatically causing a particular member of the plurality of wireless two-way communication units to operate as a member of a particular talkgroup when that particular member is within a particular second area of operation, which second area of operation is smaller than, and contained within, the first area of operation.
Claim 2
Dependent Claim
66 words
The method of claim 1, wherein the step of automatically causing a particular member of the plurality of wireless two-way communication units to operate as a member of a particular talkgroup includes the steps of: determining a present location of the particular member; and using the present location of the particular member to determine when the particular member is within the particular second area of operation.
Claim 3
Dependent Claim
33 words
The method of claim 2, wherein the step of using the present location includes the step of providing, by the particular member, the present location of the particular member to a system controller.
Claim 4
Dependent Claim
45 words
The method of claim 3, wherein the step of causing a particular member of the plurality of wireless two-way communication units to operate as a member of a particular talkgroup further includes the step of receiving from the system controller information regarding the particular talkgroup.
Claim 5
Dependent Claim
37 words
The method of claim 3, wherein the step of providing the present locations includes the steps of: receiving information from a global positioning system; and determining position parameters based on information received from the global positioning system.
Claim 6
Dependent Claim
123 words
In a radio communication system, a method for automatically selecting a radio talkgroup, the method comprising the steps of: providing a plurality of wireless two-way communication units capable of communicating with one another within a first area of operation; defining a second area of operation, which second area of operation is smaller than and contained within the first area of operation; providing talkgroup identification information that corresponds to the second area of operation; determining present locations of the plurality of wireless two-way communication units; and when one of the plurality of wireless two-way communication units is within the second area of operation, automatically causing the one communication unit to operate using the talkgroup identification information that corresponds to the second area of operation.
Claim 7
Dependent Claim
48 words
The method of claim 6, wherein the step of determining present locations includes the steps of: obtaining, by the one communication unit, present location information from a source external to the radio communication system; and providing, by the one communication unit, present location information to a system controller.
Claim 8
Dependent Claim
41 words
The method of claim 7, wherein the step of providing, by the one communication unit, present location includes the steps of: receiving information from a global positioning system; and determining position parameters based on information received from the global positioning system.
Claim 9
Dependent Claim
93 words
A radio communication system having automatic selection of radio talkgroup, comprising: a database having associations of talkgroup and geographically defined subregions, including an association of a particular talkgroup and a particular geographically defined subregion; and a communication unit having a receiver for receiving a signal indicating a present location of the communication unit; wherein the communication unit is responsive to the signal received by the receiver, indicating a present location of the communication unit, to initiate automatic selection of the particular talkgroup when the present location corresponds to the particular geographically defined subregion.
Claim 10
Dependent Claim
16 words
The radio communication system of claim 9, wherein the receiver is a global positioning system receiver.
References Cited (Backward Citations)
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