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Methods and systems for joining a sub-talkgroup of a first talkgroup

  • US 9,750,059 B2
  • Filed: 11/10/2015
  • Issued: 08/29/2017
  • Est. Priority Date: 11/10/2014
  • Status: Active Grant
First Claim
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1. A first mobile radio that is a member of a first talkgroup, the first mobile radio comprising:

  • an infrastructure wireless communication interface for communicating with an infrastructure radio access network (RAN);

    a short-range wireless communication interface for communicating with an ad-hoc network;

    a processor; and

    data storage containing instructions executable by the processor for causing the first mobile radio to carry out a set of functions, the set of functions comprising;

    receiving, via a provisioning process or via the infrastructure wireless communication interface from the RAN while within wireless communication range of the RAN, a talkgroup-specific security token associated with and shared by all group mobile radios in a first talkgroup to which the first mobile radio is subscribed via the infrastructure wireless communication interface and RAN;

    detecting, via the short-range wireless communication interface, a second mobile radio;

    authenticating, via the short-range wireless communication interface, the second mobile radio using the talkgroup-specific security token and, when successful, adding an identity of the second mobile radio to a sub-talkgroup set of mobile radios of the first talkgroup; and

    selectively transmitting one or more of voice data, image data, and video data to one of the first talkgroup via the infrastructure wireless communication interface and the sub-talkgroup set of mobile radios of the first talkgroup via the short-range wireless communication interface, and not the other, as a function of an input or condition at the first mobile radio.

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