Trunked multi-site dispatch network for trunking radios
First Claim
1. A dispatch-type of communication system having a plurality of radio cells networked together, comprising:
- a plurality of radio cells, each including a processor for controlling a respective plurality of repeaters for servicing a plurality of radio transceivers in a predefined geographical area, and each including a modem and plural voice ports;
a hub arbitrator having a programmed processor, a switching network and a plurality of modems;
a plurality of voice lines coupled between the voice ports of each said radio cell and the hub arbitrator switching network via a public switched network;
a data line, separate from said voice lines, coupled between a modem of each respective radio cell and a respective modem of said hub arbitrator, via said public switched network; and
said hub arbitrator processor and each said radio cell processor being programmed to transmit and receive via said data lines, packets of data including a field dedicated to identifying a group of transceivers associated with at least one said radio cell, and said hub arbitrator processor being programmed to select one said voice line between a radio cell transmitting a voice message and a plurality of radio cells receiving said voice message.
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Accused Products
Abstract
A system for networking dispatch-type of communications. A plurality of radio cells are coupled to a centralized hub controller via the public switched telephone network. The radio cells are networked together via the hub controller using one or more telephone voice lines and a respective data line for providing communications between each radio cell and the hub controller. Data packets are transferred between the radio cells and the hub controller on the data lines to set up a path for the dispatch communications on the telephone voice lines. The hub controller carries out a trunking function of the telephone voice lines so that the number of voice lines are minimized, while yet preventing blocking of dispatch communications.
136 Citations
30 Claims
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1. A dispatch-type of communication system having a plurality of radio cells networked together, comprising:
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a plurality of radio cells, each including a processor for controlling a respective plurality of repeaters for servicing a plurality of radio transceivers in a predefined geographical area, and each including a modem and plural voice ports; a hub arbitrator having a programmed processor, a switching network and a plurality of modems; a plurality of voice lines coupled between the voice ports of each said radio cell and the hub arbitrator switching network via a public switched network; a data line, separate from said voice lines, coupled between a modem of each respective radio cell and a respective modem of said hub arbitrator, via said public switched network; and said hub arbitrator processor and each said radio cell processor being programmed to transmit and receive via said data lines, packets of data including a field dedicated to identifying a group of transceivers associated with at least one said radio cell, and said hub arbitrator processor being programmed to select one said voice line between a radio cell transmitting a voice message and a plurality of radio cells receiving said voice message.
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2. A dispatch-type of communication system having a plurality of radio cells networked together, comprising:
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a plurality of radio cells, each serving a respective plurality of dispatch-type radios, each said radio cell including a processor and a plurality of repeaters for trunking dispatch communications; a programmed hub controller; a respective data line and at least one respective voice line connecting each said radio cell to said hub controller, said data lines and said voice lines being maintained off-hook to thereby expedite communications; and said hub controller having a connection bridge for connecting an incoming voice line to plural outgoing voice lines to thereby broadcast an originating voice message from one said radio cell to plural destination radio cells, said hub controller being programmed to maintain a busy/idle table of the voice lines, and said hub controller being programmed to respond to a key request of a radio to select an idle voice line coupled to each destination radio cell for transmission of a voice message following the key request, and to idle the voice line in response to a dekey request of the radio. - View Dependent Claims (3, 4)
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5. A dispatch-type communication system having a plurality of radio cells networked together, comprising:
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a first radio cell having a plurality of radios and a plurality of repeaters for trunking communications to said radios; a second radio cell having a plurality of radios and a plurality of repeaters for trunking communications to said radios associated with said second radio cell; and a programmed central controller coupled to said first radio cell and said second radio cell by respective telephone lines, said central controller being programmed to select respective idle telephone lines connected to said first and second radio cells in response to dispatch-type of communications therebetween. - View Dependent Claims (6, 7, 8, 9)
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10. In a dispatch-type of communication system having a plurality of radio cells networked together, a method of trunking voice lines coupled between said radio cells, comprising the steps of:
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placing at least two voice lines coupled to each said radio cell in an operational mode for carrying voice signals; receiving by a first radio cell originating a unidirectional voice message, an identification of a first voice line of the plurality of voice lines on which to transmit voice signals; receiving by at least one second radio cell an identification of one voice line of the plurality of voice lines on which to receive the transmitted voice signals; receiving by said first and second radio cells an identification of a second voice line on which to carry a voice message in response to the transmitted voice message; and transmitting a unidirectional response voice message over said second voice line from said second radio cell to said first radio cell. - View Dependent Claims (11, 12, 13, 14)
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15. A method of carrying out a dispatch-type of communication in which a push-to-talk action in one radio cell results in a message broadcast to a destination radio cell, comprising the steps of:
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in response to a push-to-talk request in said one radio cell, transferring a data request to a central controller; selecting by said central controller a first idle voice line connected to said one radio cell; transmitting by said central controller to said destination radio cell an identification of an originating communication corresponding to said push-to-talk request; selecting by said destination radio cell, based on the identification of said originating communication, at least one destination radio receiver; and allowing by said central controller a broadcast of voice signals associated with the push-to-talk communication from said one radio cell via the selected telephone voice line to said selected destination radio receiver to receive the voice signals. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification