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US6304559B1
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Wireless communications protocol
Assignee: Northrop Grumman Systems Corp
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Filing: 2000-05-11
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Granted: 2001-10-16
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Expires: 2020-05-11
Abstract
Abstract A method for implementing a timed division multiple access protocol for digital communications between a radio transceiver and a repeater or another radio transceiver has the steps of dividing a radio communication into a plurality of frames having a predetermined length of time; dividing each frame into: a plurality of downlink slots, each downlink slot containing a transmission from the repeater to the transceiver; and a plurality of uplink slots, each uplink slot containing a transmission from the transceiver to the repeater.
Inventors
- 👤 William Edward Jacklin
- 👤 Scott Alan Stratmoen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:18
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/14; H04B7/15; H04B7/155; H04B7/15528; H04B7/24; H04B7/26; H04B7/2603; H04B7/2606; H04B7/2643; H04B7/2656
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
170 words
A method for implementing a time division multiple access protocol for full duplex communication between a repeater and at least one radio transceiver, the method comprising the steps of: a) segmenting a voice communication into a plurality of frames having a predetermined length of time; b) segmenting each frame into: i) a plurality of downlink slots each downlink slot for supporting the voice communication from the repeater to the transceiver(s) therein; ii) a plurality of uplink slots each uplink slot for supporting the voice communication from the transceiver(s) to the repeater therein; iii) wherein each of the downlink and uplink slots are segmented into: (1) a bit synchronization field for timing acquisition; (2) a slot field for slot acquisition; (3) a header field for control information; (4) a data field for digital audio and digital data information; (5) a CRC field for error detection; (6) a slot gap field for accommodating clock inaccuracies; and c) transmitting the voice communication between the repeater and the transceiver(s) in full duplex transmission mode.
Claim 2
Independent Claim
170 words
A method for implementing a time division multiple access protocol for full duplex communication between a repeater and at least one radio transceiver, the method comprising the steps of: a) segmenting a voice communication into a plurality of frames having a predetermined length of time; b) segmenting each frame into: i) a plurality of downlink slots each downlink slot for supporting the voice communication from the repeater to the transceiver(s) therein; ii) a plurality of uplink slots each uplink slot for supporting the voice communication from the transceiver(s) to the repeater therein; iii) wherein each of the downlink and uplink slots are segmented into: (1) a bit synchronization field for timing acquisition; (2) a slot field for slot acquisition; (3) a header field for control information; (4) a data field for digital audio and digital data information; (5) a CRC field for error detection; (6) a slot gap field for accommodating clock inaccuracies; and c) transmitting the voice communication between the repeater and the transceiver(s) in full duplex transmission mode.
Claim 3
Dependent Claim
18 words
The method of claim 1 wherein step a) comprises segmenting a digital communication into the plurality of frames.
Claim 4
Dependent Claim
18 words
The method of claim 1 wherein step a) comprises segmenting a data communication into the plurality of frames.
Claim 5
Dependent Claim
28 words
The method of claim 1 wherein step b) comprises further comprises forming a frame gap intermediate adjacent frames to prevent adjacent frames from overlapping due to clock inaccuracies.
Claim 6
Dependent Claim
44 words
The method of claim 1 wherein step b) further comprises segmenting the header field into: a) a message type field; b) a message subtype field; c) an ID field; d) a reserved field; e) a first modifier field; and f) a second modifier field.
Claim 7
Dependent Claim
23 words
The method of claim 1 wherein step b) further comprises segmenting each of the downrank and uplink slots into a 16-bit CRC field.
Claim 8
Dependent Claim
39 words
The method of claim 1 wherein step c) further comprises: a) the radio transceiver(s) transmitting information via an available uplink slot to the repeater; and b) the repeater transmitting information via a corresponding downlink slot to the radio transceiver(s).
Claim 9
Independent Claim
188 words
A method for implementing a time division multiple access protocol for full duplex communication between a repeater and at least one radio transceiver, the method comprising the steps of: a) segmenting a communication into a plurality of frames having a predetermined length of time; b) segmenting each frame into: i) a plurality of downlink slots, each downlink slot for supporting the communication from the repeater to the transceiver(s) therein; ii) a plurality of uplink slots, each uplink slot for supporting the communication from the transceiver(s) to the repeater therein; iii) wherein each of the downlink and uplink slots are segmented into: (1) a bit synchronization field for timing acquisition; (2) a slot field for slot acquisition; (3) a header field for control information, the header field being segmentable into an 8-bit message type header field for facilitating identification of at least 256 different message types; (4) a data field for digital audio and digital data information; (5) a CRC field for error detection; (6) a slot gap field for accommodating clock inaccuracies; and c) transmitting the communication between the repeater and the transceiver(s) in full duplex transmission mode.
Claim 10
Independent Claim
188 words
A method for implementing a time division multiple access protocol for full duplex communication between a repeater and at least one radio transceiver, the method comprising the steps of: a) segmenting a communication into a plurality of frames having a predetermined length of time; b) segmenting each frame into: i) a plurality of downlink slots, each downlink slot for supporting the communication from the repeater to the transceiver(s) therein; ii) a plurality of uplink slots, each uplink slot for supporting the communication from the transceiver(s) to the repeater therein; iii) wherein each of the downlink and uplink slots are segmented into: (1) a bit synchronization field for timing acquisition; (2) a slot field for slot acquisition; (3) a header field for control information, the header field being segmentable into an 8-bit message type header field for facilitating identification of at least 256 different message types; (4) a data field for digital audio and digital data information; (5) a CRC field for error detection; (6) a slot gap field for accommodating clock inaccuracies; and c) transmitting the communication between the repeater and the transceiver(s) in full duplex transmission mode.
Claim 11
Independent Claim
119 words
A method for implementing a time division multiple access protocol for full duplex communication between a repeater and at least one radio transceiver, the method comprising the steps of: a) segmenting a voice communication into a plurality of frames; b) segmenting each frame into a plurality of downlink and uplink slots; c) supporting the voice communication from the repeater to the transceiver(s) with each downlink slot; d) determining when each uplink slot is available for access thereto via the repeater; e) selectively accessing each uplink slot via utilizing a control algorithm for supporting the voice communication from the transceiver(s) to the repeater; and f) transmitting the voice communication between the repeater and the transceiver(s) in full duplex transmission mode.
Claim 12
Independent Claim
119 words
A method for implementing a time division multiple access protocol for full duplex communication between a repeater and at least one radio transceiver, the method comprising the steps of: a) segmenting a voice communication into a plurality of frames; b) segmenting each frame into a plurality of downlink and uplink slots; c) supporting the voice communication from the repeater to the transceiver(s) with each downlink slot; d) determining when each uplink slot is available for access thereto via the repeater; e) selectively accessing each uplink slot via utilizing a control algorithm for supporting the voice communication from the transceiver(s) to the repeater; and f) transmitting the voice communication between the repeater and the transceiver(s) in full duplex transmission mode.
Claim 13
Dependent Claim
18 words
The method of claim 9 wherein step a) comprises segmenting a digital communication into the plurality of frames.
Claim 14
Dependent Claim
18 words
The method of claim 9 wherein step a) comprises segmenting a data communication into the plurality of frames.
Claim 15
Dependent Claim
25 words
The method of claim 9 wherein step a) comprises segmenting the communication into the plurality of frames each having a length of approximately 5.12 milliseconds.
Claim 16
Dependent Claim
26 words
The method of claim 9 wherein step b) comprises segmenting each of the frames into the plurality of paired downlink and uplink slots having corresponding indices.
Claim 17
Dependent Claim
16 words
The method of claim 9 wherein the control algorithm is a Medium Access Control (MAC) algorithm.
Claim 18
Dependent Claim
38 words
The method of claim 9 wherein step b) further comprises: a) defining a downlink slot D o ; and b) the repeater transmitting information via the downlink slot D o to the radio transceiver(s) without the uplink slots.
Claim 19
Dependent Claim
27 words
The method of claim 9 wherein step b) further comprises forming a frame gap intermediate adjacent frames to prevent adjacent frames from overlapping due to clock inaccuracies.
Claim 20
Dependent Claim
28 words
The method of claim 9 wherein step b) further comprises forming a frame gap intermediate adjacent frames to facilitate synthesizer re-programming in a frequency hopping spread spectrum system.
Claim 21
Dependent Claim
69 words
The method of claim 9 wherein step b) further comprises segmenting each of the downlink and uplink slots into: a) a bit synchronization field for timing acquisition; b) a slot field for slot acquisition; c) a header field for control information; d) a data field for digital audio and digital data information; e) a CRC field for error detection; and f) a slot gap field for accommodating clock inaccuracies.
Claim 22
Dependent Claim
44 words
The method of claim 18 wherein step c) further comprises segmenting the header field into: a) a message type field; b) a message subtype field; c) an ID field; d) a reserved field; e) a first modifier field; and f) a second modifier field.
Claim 23
Dependent Claim
34 words
The method of claim 19 wherein step a) further comprises segmenting each of the downlink and uplink slots into an 8-bit message type field to facilitate identification of at least 256 different message types.
Claim 24
Dependent Claim
23 words
The method of claim 18 wherein step b) further comprises segmenting each of the downlink and uplink slots into a 16-bit CRC field.
Claim 25
Dependent Claim
39 words
The method of claim 9 wherein step c) further comprises: a) the radio transceiver(s) transmitting information via an available uplink slot to the repeater; and b) the repeater transmitting information via a corresponding downlink slot to the radio transceiver(s).
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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) | 2004-10-15 | 2005-04-16 | 2005-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-10-15 | 2009-04-16 | 2009-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-10-15 | 2013-04-16 | 2013-10-16 | $7700.00 | Window Closed / Lapsed |