Method and system for broadcast message transmission in mobile systems
First Claim
1. A method for dynamically changing transmission parameters of messages broadcast by a vehicle via a broadcast transmission channel, the method comprising:
- collecting vehicle information about the vehicle;
placing the collected information in a message to be broadcast by the vehicle;
monitoring broadcast transmission channel characteristics;
dynamically adjusting the transmission parameters of the message including how often the message to be broadcast via the broadcast transmission channel, based on the monitored broadcast transmission channel characteristics;
broadcasting the message by the vehicle via the broadcast transmission channel, using the adjusted transmission parameters of the message, anda first set of transmission parameters when the broadcast transmission channel is lightly loaded;
using a second set of transmission parameters when the broadcast transmission channel is moderately loaded; and
using a third set of transmission parameters when the broadcast transmission channel is heavily loaded.
1 Assignment
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Accused Products
Abstract
A method and device for dynamically changing transmission parameters of broadcast messages transmitted and received by a mobile unit. The method and device include monitoring transmission channel characteristics; dynamically adjusting the transmission parameters of a message based on the monitored transmission channel characteristics; and broadcasting the message using the adjusted transmission parameters. The transmission parameters may include one or more of transmission power, error code rate, and modulation rate. The transmission channel characteristics include one or more of the group consisting of received message density, channel congestion, detected number of message collisions, and signal to interference ratio.
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Citations
21 Claims
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1. A method for dynamically changing transmission parameters of messages broadcast by a vehicle via a broadcast transmission channel, the method comprising:
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collecting vehicle information about the vehicle; placing the collected information in a message to be broadcast by the vehicle; monitoring broadcast transmission channel characteristics; dynamically adjusting the transmission parameters of the message including how often the message to be broadcast via the broadcast transmission channel, based on the monitored broadcast transmission channel characteristics; broadcasting the message by the vehicle via the broadcast transmission channel, using the adjusted transmission parameters of the message, and a first set of transmission parameters when the broadcast transmission channel is lightly loaded;
using a second set of transmission parameters when the broadcast transmission channel is moderately loaded; and
using a third set of transmission parameters when the broadcast transmission channel is heavily loaded. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 20, 21)
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12. A mobile device for wirelessly communicating messages broadcast at a transmission rate comprising:
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an input port for receiving vehicle information about a vehicle; a radio transceiver for placing the collected information in a message to be broadcast and for receiving and transmitting the broadcast messages; a processor for monitoring transmission channel characteristics, dynamically adjusting the transmission parameters of a message including how often the message to be broadcast, based on the monitored transmission channel characteristics; and
transmitting the message using the adjusted transmission parameters, anda first set of transmission parameters when the broadcast transmission channel is lightly loaded;
using a second set of transmission parameters when the broadcast transmission channel is moderately loaded; and
using a third set of transmission parameters when the broadcast transmission channel is heavily loaded. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification