US6163680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two way radio communication system and method for establishing communication
Assignee: Motorola Solutions Inc
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Filing: 1998-06-17
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Granted: 2000-12-19
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Expires: 2018-06-17
Abstract
Abstract A two way radio communication system (20) includes a plurality of radio units (22, 24, 26, 28, 30) communicating via at least one communication resource (34, 36). At least one first radio unit (22, 24, 26, 28, 30) of the plurality of radio units includes a receiver (48) for monitoring available resources of the at least one communication resource (34, 36) and a processor (46) for maintaining a prioritized list (45) of said available at least one communication resources and for selecting the highest priority available communication resource when the at least one radio unit (22, 24, 26, 28, 30) wishes to enter into communication with at least one second radio unit of the plurality of radio units. In this manner, an optimized communication resource is selected for the communication.
Inventors
- 👤 Matthew Bridle
- 👤 Antony John Wray
- 👤 Rafael Carmon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:15
CPC Classifications
H; H04; H04W; H04W84/00; H04W84/02; H04W84/04; H04W84/08; H04W72/00; H04W72/30; H04W40/00; H04W40/24; H04W40/248; H04W84/18
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
172 words
A two way radio communication system having a plurality of radio units communicating via at least one communication resource wherein at least one first radio unit of said plurality of radio units comprises; a receiver for monitoring available resources of said at least one communication resource; and a processor for maintaining a prioritised list of said available at least one communication resources and for selecting a highest priority available communication resource when said at least one first radio unit wishes to enter into communication with at least one second radio unit of said plurality of radio units; and a transmitter to transmit said prioritised list to said at least one second radio unit wherein said at least one second radio unit receives said prioritised list, determines a preferred available at least one communication resource for communication between said at least one first radio unit and said at least one second radio unit and transmits information on said preferred available at least one communication resource to said at least one first radio unit.
Claim 2
Dependent Claim
172 words
A two way radio communication system having a plurality of radio units communicating via at least one communication resource wherein at least one first radio unit of said plurality of radio units comprises; a receiver for monitoring available resources of said at least one communication resource; and a processor for maintaining a prioritised list of said available at least one communication resources and for selecting a highest priority available communication resource when said at least one first radio unit wishes to enter into communication with at least one second radio unit of said plurality of radio units; and a transmitter to transmit said prioritised list to said at least one second radio unit wherein said at least one second radio unit receives said prioritised list, determines a preferred available at least one communication resource for communication between said at least one first radio unit and said at least one second radio unit and transmits information on said preferred available at least one communication resource to said at least one first radio unit.
Claim 3
Dependent Claim
46 words
A two way radio communication system according to claim 1 wherein the prioritised list of the first radio unit includes at least one predetermined preferred communication resource for attempting to enter into communication with at least one second radio unit of the plurality of radio units.
Claim 4
Dependent Claim
48 words
A two way radio communication system according to claim 1 wherein the first radio unit determines whether at least one communication resource is available by monitoring a signal strength of said at least one communication resource and calculating whether said signal strength exceeds a predetermined threshold signal level.
Claim 5
Dependent Claim
36 words
A two way radio communication system according to claim 3 wherein said signal strength monitoring of said at least one communication resource is used to determine the priority of said available at least one communication resource.
Claim 6
Dependent Claim
23 words
A two way radio communication system according to claim 1 wherein the first radio unit monitors only said higher priority available communication resources.
Claim 7
Dependent Claim
48 words
A two way radio communication system according to claim 1 wherein the list of available communication resource is a binary sequence of all of the communication resources such that individual elements of the binary sequence are indicative of either an available or non-available at least one communication resource.
Claim 8
Dependent Claim
60 words
A two way radio communication system according to claim 1, wherein the first radio unit communicates with a first group of radio units from a plurality of groups such that the plurality of groups exceeds the communication resources within the communication system and the first radio unit transmits the same information to the radio units assigned to the first group.
Claim 9
Dependent Claim
61 words
A two way radio communication system as claimed in claim 7 wherein the first radio unit continues to transmit to said second radio units on the selected at least one communication resource for a predetermined hang up time after a communication terminates to allow said second radio units within the same group to maintain the radio connection link for further communications.
Claim 10
Dependent Claim
84 words
A two way radio communication system as claimed in claim 7 wherein the first radio unit transmits a first signal indicative of the preferred at least one communication resource of the first radio unit to the first group of radio units to set up a call, the first group of radio units receive the signal and a third radio unit of the first group of radio units transmits a second signal indicating that the preferred signal is not acceptable to the third radio unit.
Claim 11
Dependent Claim
50 words
A two way radio communication system as claimed in claim 9 wherein the first radio unit and first group of radio units monitor the communication resources to receive a transmission of the second signal and select the preferred at least one communication resource when a second signal is not forthcoming.
Claim 12
Dependent Claim
41 words
A two way communication system as claimed in claim 1, wherein the at least one communication resource is frequency channel and the communication system is a Time Division Multiplex Access (TDMA) communication system operating in a direct mode of operation (DMO).
Claim 13
Dependent Claim
16 words
A radio transceiver for use in a two way radio communication system according to claim 1.
Claim 14
Independent Claim
184 words
A method of operating a two way radio communication system having a plurality of radio units communicating via at least one communication resource the method comprising the steps of: monitoring available resources of said at least one communication resource by a first radio unit; maintaining a prioritised list of said available resources; selecting a highest priority available communication resource when said first radio unit wishes to enter into communication with at least one second radio unit of said plurality of radio units; transmitting said prioritised list from said first radio unit to said at least one second radio unit; receiving said prioritised list at said at least one second radio unit; determining a preferred available communication resource for communication between said first radio unit and said at least one second radio unit at said at least one second radio unit; transmitting said preferred available communication resource from said at least one second radio unit to said first radio unit; and establishing a radio connection on a selected communication resource for communicating between said first radio unit and said at least one second radio unit.
Claim 15
Independent Claim
184 words
A method of operating a two way radio communication system having a plurality of radio units communicating via at least one communication resource the method comprising the steps of: monitoring available resources of said at least one communication resource by a first radio unit; maintaining a prioritised list of said available resources; selecting a highest priority available communication resource when said first radio unit wishes to enter into communication with at least one second radio unit of said plurality of radio units; transmitting said prioritised list from said first radio unit to said at least one second radio unit; receiving said prioritised list at said at least one second radio unit; determining a preferred available communication resource for communication between said first radio unit and said at least one second radio unit at said at least one second radio unit; transmitting said preferred available communication resource from said at least one second radio unit to said first radio unit; and establishing a radio connection on a selected communication resource for communicating between said first radio unit and said at least one second radio unit.
Claim 16
Dependent Claim
48 words
A method of operating a two way radio communication system according to claim 13, further comprising the steps of: determining whether at least one communication resource is available by monitoring a signal strength of said resource; and calculating whether said signal strength exceeds a predetermined threshold signal level.
Claim 17
Dependent Claim
34 words
A method of operating a two way radio communication system according to claim 14, wherein said signal strength monitoring of said communication resources is used to determine the priority of said available communication resources.
Claim 18
Dependent Claim
27 words
A method of operating a two way radio communication system according to claim 13, wherein the first radio unit monitors only said higher priority available communication resources.
Claim 19
Dependent Claim
50 words
A method of operating a two way radio communication system unit according to claim 13, wherein the list of available communication resource is a binary sequence of all of the communication resources such that individual elements of the binary sequence are indicative of either an available or non-available communication resource.
Claim 20
Dependent Claim
71 words
A method of operating a two way radio communication system unit according to claim 13, wherein the first radio unit communicates with a first group of radio units from a plurality of groups such that the plurality of groups exceeds the communication resources within the communication system, the method further comprising the step: transmitting the same information from the first radio unit to the radio units assigned to the first group.
Claim 21
Dependent Claim
70 words
A method of operating a two way radio communication system unit according to claim 18 further comprising the step of: continuing to transmit from the first radio unit to said second radio units on the selected at least one communication resource for a predetermined hang up time after a communication terminates thereby allowing said second radio units within the same group to maintain the radio connection link for further communications.
Claim 22
Dependent Claim
103 words
A method of operating a two way radio communication system unit according to claim 18 the method further comprising the step of: transmitting a first signal indicative of the preferred at least one communication resource from the first radio unit of the first radio unit to the first group of radio units to set up a call; receiving at the first group of radio units the first signal; and transmitting a second signal from a third radio unit of the first group of radio units such that the second signal indicates that the preferred signal is not acceptable to the third radio unit.
Claim 23
Dependent Claim
53 words
A method of operating a two way radio communication system unit according to claim 18 the method further comprising the steps of: monitoring the communication resources by the first radio unit and first group of radio units; and selecting the preferred at least one communication resource when a second signal is not forthcoming.
Claim 24
Dependent Claim
46 words
A method of operating a two way radio communication system unit according to claim 13, wherein the at least one communication resource is frequency channel and the communication system is a Time Division Multiplex Access (TDMA) communication system operating in a direct mode of operation (DMO).
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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) | 2003-12-19 | 2004-06-19 | 2004-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-12-19 | 2008-06-19 | 2008-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-12-19 | 2012-06-19 | 2012-12-19 | $7700.00 | Window Closed / Lapsed |