Method and apparatus for establishing a private conversation for more than two mobile units in a trunked system
First Claim
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1. A method for establishing a group private conversation in a trunked radio frequency system including at least first, second and third radios, a plurality of communication channels, and a system controller, the method comprising the steps of:
- (a) transmitting a first message from the first radio to the system controller requesting that a confidential communication channel be established so that the first radio can communicate with the second radio;
(b) selecting one from among the plurality of communication channels as the confidential communication channel to be used to establish a communication link between the first and second radios; and
(c) transmitting a second message from either the first or second radio to the system controller requesting that the third radio join the communication link established on the confidential communication channel.
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Abstract
A method for establishing a private group conversation includes the step of sending a message from a first radio requesting that an exclusive channel be established with a second radio (step 302). Once the exclusive channel has been established, either one of the first or second radios can then send a message to the system controller (104) requesting that a third radio be added to the conversation taking place via the exclusive channel (step 306).
16 Citations
14 Claims
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1. A method for establishing a group private conversation in a trunked radio frequency system including at least first, second and third radios, a plurality of communication channels, and a system controller, the method comprising the steps of:
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(a) transmitting a first message from the first radio to the system controller requesting that a confidential communication channel be established so that the first radio can communicate with the second radio; (b) selecting one from among the plurality of communication channels as the confidential communication channel to be used to establish a communication link between the first and second radios; and (c) transmitting a second message from either the first or second radio to the system controller requesting that the third radio join the communication link established on the confidential communication channel. - View Dependent Claims (2, 3, 4, 5)
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6. A trunked radio communication system having a system controller and a plurality of communication channels, comprising:
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first, second and third radios each having a transmitter and receiver for transmitting and receiving messages; a system controller; a plurality of radio frequency repeaters each providing a radio frequency communication channel, the plurality of repeaters are under the control of the system controller; the system controller, in response to the reception of a first message from the first radio, assigning one of the plurality of radio frequency repeaters as the repeater that provides a confidential communication channel for establishing a communication link between the first and second radios; and the system controller assigning the third radio to the confidential communication channel in response to receiving a second message from either the first or second radios thereby joining the third radio to the communication link established between the first and second radios. - View Dependent Claims (7, 8, 9)
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10. A method for establishing an exclusive communication channel between a plurality of radios operating in a trunked radio communication system, comprising the steps of:
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(a) transmitting a first message from one of the plurality of radios requesting that an exclusive communication channel be assigned; (b) providing the exclusive communication channel in response to the first message transmitted in step (a); (c) establishing a communication link between the radio that transmitted the first message in step (a) and another radio from among the plurality of radios using the exclusive communication channel; and (d) transmitting a second message from one of the two radios using the exclusive communication channel in step (c) requesting that a third radio from among the plurality of radios join the communication link established on the exclusive communication channel. - View Dependent Claims (11, 12, 13, 14)
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Specification