Radio frequency multicasting
First Claim
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1. A method for communicating land mobile radio (LMR) content, the method comprising:
- assigning a different traffic multicast Internet Protocol (IP) address to each of a plurality of talk groups;
identifying at least one talk group of said plurality of talk groups having an active communication within a communication site;
determining if an LMR unit, which is not currently participating in the active communication, is a subscriber to said identified talk group;
identifying a traffic multicast IP address that is assigned to said identified talk group;
communicating said traffic multicast IP address to said LMR unit only if it is determined that said LMR unit is a subscriber to said identified talk group;
encapsulating the LMR content within IP packets; and
transmitting the IP packets to or from said LMR unit and at least two other LMR units that are participating in said active communication using said traffic multicast IP address.
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Abstract
A method for radio frequency multicasting and a multicast site architecture are provided. The method includes assigning a different traffic multicast Internet Protocol (IP) address to each of a plurality of groups of LMR users and encapsulating the LMR content within IP packets. The method further includes transmitting the IP packets to one of the plurality of groups of LMR users using at least one of the assigned traffic multicast IP addresses.
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Citations
16 Claims
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1. A method for communicating land mobile radio (LMR) content, the method comprising:
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assigning a different traffic multicast Internet Protocol (IP) address to each of a plurality of talk groups; identifying at least one talk group of said plurality of talk groups having an active communication within a communication site; determining if an LMR unit, which is not currently participating in the active communication, is a subscriber to said identified talk group; identifying a traffic multicast IP address that is assigned to said identified talk group; communicating said traffic multicast IP address to said LMR unit only if it is determined that said LMR unit is a subscriber to said identified talk group; encapsulating the LMR content within IP packets; and transmitting the IP packets to or from said LMR unit and at least two other LMR units that are participating in said active communication using said traffic multicast IP address. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for providing land mobile radio (LMR) radio frequency (RF) communication, the method comprising:
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monitoring at least one control stream to detect a particular control multicast Internet Protocol (IP) address, the control stream comprising call control and signaling information; identifying, at a controller of a communication site, at least one talkgroup of a plurality of talkgroups having an active communication within said communication site; determining, at said controller, if an LMR unit, which is not currently participating in said active communication, is a subscriber to said talkgroup; identifying, at said controller, a traffic multicast IP address that is assigned to said talkgroup; communicating said traffic multicast IP address from said controller to said LMR unit only if it is determined that said LMR unit is a subscriber to said talkgroup; communicating encapsulated LMR content between said LMR unit and at least two other LMR units that are participating in said active communication using said traffic multicast IP address. - View Dependent Claims (14, 15, 16)
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Specification