Mobile radio device having adaptive position transmitting capabilities
First Claim
1. In a radio network including a mobile radio, a method of scheduling the transmission by the mobile radio of a position message including a computed position of the mobile radio, the method comprising the steps of:
- (a) periodically determining a network loading parameter indicating a level of transmission activity on the radio network; and
(b) determining when to transmit the position message from the mobile radio across the network as a function of the network loading parameter;
wherein steps (a) and (b) are determined by the mobile radio.
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Accused Products
Abstract
An Adaptive Position Transmission Algorithm (APTA) for mobile radio device where position information is required, using any transmission medium such as high frequency (HF), very high frequency (VHF), ultra high frequency (UHF), Satellite Communications (SATCOM), etc. A mobile radio device employing the APTA provides accurate and automatic position reporting and thus, in a tactical environment improves situation awareness and reduces the probability of fratricide. A mobile radio device employing the APTA also reduces the number of options available to the user thereby simplifying the operation thereof while improving overall performance in most applications. The APTA accomplishes this by monitoring position, time and radio network parameters to determine when stand alone messages will be transmitted. The APTA factors radio network loading with movement and periodic thresholds. As radio network loading increases, the movement and periodic thresholds are increased to reduce the impact of position reporting on the radio network. The APTA also incorporates a time limit which prevents the radio from transmitting too often. This time limit is based on radio network loading.
20 Citations
31 Claims
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1. In a radio network including a mobile radio, a method of scheduling the transmission by the mobile radio of a position message including a computed position of the mobile radio, the method comprising the steps of:
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(a) periodically determining a network loading parameter indicating a level of transmission activity on the radio network; and
(b) determining when to transmit the position message from the mobile radio across the network as a function of the network loading parameter;
wherein steps (a) and (b) are determined by the mobile radio. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
(b1) limiting a rate at which scheduled position messages are transmitted by setting a minimum time between transmission of a most recently transmitted position message and transmission of a next scheduled position message, the minimum time being set as a function of the network loading parameter. -
4. The method of claim 3, wherein step (b) further includes:
(b2) transmitting a position message when a time since transmission of the most recently transmitted position message is greater than the minimum time and the distance traveled by the mobile radio since transmission of the most recently transmitted position message a movement threshold.
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5. The method of claim 4, wherein step (b) includes:
(b3) setting the movement threshold as a function of the network loading parameter.
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6. The method of claim 1, wherein step (b) includes:
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(b1) setting a duration of a periodic time interval as a function of the network loading parameter;
(b2) initializing a start time of the periodic time interval when a most recently transmitted position message is transmitted; and
(b3) transmitting a position message when a time since transmission of the most recently transmitted position message is greater than the periodic time interval.
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7. The method of claim 1, wherein step (b) includes:
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(b1) setting a movement threshold as a function of the network loading parameter; and
(b2) transmitting a position message when the distance traveled by the mobile radio since transmission of a most recently transmitted position message is greater than the movement threshold.
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8. The method of claim 1, wherein the mobile radio is capable of automatically transmitting position messages with voice or data messages and scheduling transmission of stand-alone position messages, wherein:
step (b) includes scheduling transmission of a next stand-alone position message as a function of;
a minimum time elapsed since transmission of a most recently transmitted position message;
a periodic time interval; and
a minimum distance traveled by the mobile radio since transmission of the most recently transmitted position message, wherein the minimum time, the periodic time interval and the minimum distance are parameters whose values are set as a function of the network loading parameter.
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9. The method of claim 8, wherein step (b) further includes transmitting a stand-alone position message if a time since transmission of the most recently transmitted position message is greater than the minimum time and, either the time since transmission of the most recently transmitted position message is greater than the periodic time interval or the distance traveled by the mobile radio since transmission of the most recently transmitted position message is greater than the minimum distance.
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10. The method of claim 8, wherein step (a) includes periodically determining an idle time as a percentage of time of no network activity during a predetermined time period, and step (b) includes increasing the minimum time, the periodic time interval and the minimum distance as idle time decreases.
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11. The method of claim 8, wherein the most recently transmitted position message is a stand-alone position message or a position message transmitted with a voice or data message.
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12. The method of claim 8, wherein the mobile radio is configurable to be in one of a plurality of movement modes, wherein the minimum distance is set as a function of the movement mode.
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13. The method of claim 1, wherein the position message includes a satellite navigation situation awareness message.
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14. In a radio network including a mobile radio, a method of transmitting a position message including a position of the mobile radio, the method comprising the steps of:
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(a) initializing a start time of a periodic time interval when a most recently transmitted position message is transmitted; and
(b) transmitting the position message based upon a joint consideration of a time and a distance traveled by the mobile radio since transmission of the most recently transmitted position message, wherein the position message is transmitted when at least one of the time since transmission of the most recently transmitted position message is greater than the periodic time interval and the distance traveled by the mobile radio since transmission of the most recently transmitted position message is greater than a movement threshold. - View Dependent Claims (15)
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16. In a radio network including a mobile radio, a method of transmitting a position message including a position of the mobile radio, the method comprising the steps of:
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(a) setting a minimum time between transmission of a most recently transmitted position message and transmission of a next scheduled position message; and
(b) transmitting the position message when a time since transmission of the most recently transmitted position message is greater than the minimum time and the distance traveled by the mobile radio since transmission of the most recently transmitted position message is greater than a movement threshold, thereby limiting a rate at which scheduled position messages are transmitted when the mobile radio is moving rapidly.
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17. A mobile radio capable of transmitting, across a radio network, position messages that indicate the position of the mobile radio, comprising:
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a receiver adapted to receive navigation data;
a processor coupled to said receiver and responsive to the navigation data to determine a position of the mobile radio, said processor periodically determining a network loading parameter indicating a level of transmission activity on the radio network and scheduling a time to transmit a position message from the mobile radio across the radio network as a function of the network loading parameter; and
a transmitter coupled to said processor and adapted to transmit across the radio network the position message indicating the position of the mobile radio. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
the mobile radio is capable of automatically transmitting position messages with voice or data messages and scheduling transmission of stand-alone position messages; and
said processor schedules transmission of a next stand-alone position message as a function of;
a minimum time elapsed since transmission of a most recently transmitted position message;
a periodic time interval; and
a minimum distance traveled by the mobile radio since transmission of the most recently transmitted position message, wherein the minimum time, the periodic time interval and the minimum distance are parameters whose values are set as a function of the network loading parameter.
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25. The radio of claim 24, wherein said processor schedules transmission of a stand-alone position message if a time since transmission of the most recently transmitted position message is greater than the minimum time and, either the time since transmission of the most recently transmitted position message is greater than the periodic time interval, or the distance traveled by the mobile radio since transmission of the most recently transmitted position message is greater than the minimum distance.
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26. The radio of claim 24, wherein said processor periodically determines an idle time as a percentage of time of no network activity during a predetermined time period and increases the minimum time, the periodic time interval and the minimum distance as idle time decreases.
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27. The radio of claim 24, wherein the most recently transmitted position message is a stand-alone position message or a position message transmitted with a voice or data message.
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28. The radio of claim 24, wherein the mobile radio is configurable to be in one of a plurality of movement modes, wherein the minimum distance is set as a function of the movement mode.
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29. A mobile radio capable of transmitting, across a radio network, position messages that include the position of the mobile radio, comprising:
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a receiver adapted to receive navigation data;
a processor coupled to said receiver and responsive to the navigation data to determine a position of the mobile radio, said processor scheduling a time to transmit a position message based upon a joint consideration of a time and a distance traveled by the mobile radio since transmission of a most recently transmitted position message, wherein the position message is transmitted when at least one of the time since transmission of the most recently transmitted position message is greater than a predetermined time interval and the distance traveled by the mobile radio since transmission of the most recently transmitted position message is greater than a movement threshold; and
a transmitter coupled to said processor and adapted to transmit across the radio network the position message indicating the position of the mobile radio. - View Dependent Claims (30)
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31. A mobile radio capable of transmitting, across a radio network, position messages that include the position of the mobile radio, comprising:
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a receiver adapted to receive navigation data;
a processor coupled to said receiver and responsive to the navigation data to determine a position of the mobile radio, said processor setting a minimum time between transmission of a most recently transmitted position message and transmission of a next scheduled position message, and scheduling a time to transmit a position message when a time since transmission of the most recently transmitted position message is greater than the minimum time and the distance traveled by the mobile radio since transmission. of the most recently transmitted position message is greater than a movement threshold; and
a transmitter coupled to said processor and adapted to transmit across the radio network the position message indicating the position of the mobile radio.
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Specification