The embodiments of the present invention disclose a call processing method and device. The call processing method comprises: sending, by a repeater of the first site, a first call establishment request to a repeater of the second site according to a call request initiated by a first terminal, the first call establishment request comprising an identification of the second terminal; determining, by the repeater of the first site, whether a second call establishment request is received before a call establishment response sent by the repeater of the second site is received, the second call establishment request being sent by the repeater of the second site according to a call request initiated by the second terminal; and if yes, sending, by the repeater of the first site, a call collision notification to the first terminal to notify the first terminal to delay the call.

A communications assembly, comprising a first device (130) operable for a public mobile radio network (168) such as a cellular telephony network, a second device (102) operable for a private mobile radio network (166) such as a TETRA network and a communications interface module (170) configured to provide a communications conduit between said first (130) and second (102) devices over a local communications medium is disclosed. The communications interface module (170) is configured to route a communication originating at said first device (130) through said communications interface module (170) to said second device (130) for transmission over said private mobile radio network (166). Optionally or additionally a communication initiated at said communications interface module (170) is routed to said first device (130) for transmission over said public mobile radio network (168). The communications interface module (170) may be further configured to provide a communications conduit between said first (130) and second (102) devices over the local communications medium for routing a communication received at said first device (130) from said public mobile radio network (166) through said communications interface module to said second device. Further optionally or additionally a communication received at said second device (102) from said private mobile radio network (168) may be routed through said communications interface module (170) to said first device (130).

A trunking communication system, a server, an access network and a trunking communication method are disclosed. The system includes a trunking management server and an access network, the trunking management server includes a trunking call service control module and a connected trunking call media gateway module, where: the trunking call media gateway module is configured to receive service data sent through the access network by a trunking UE, and forward the service data according to a communication type of the service data for implementing user plane communication of the trunking UE; and the trunking call service control module is configured to receive a communication request sent through the access network by a trunking UE, and perform call control and bearer management on the trunking UE according to a communication type of the communication request for implementing control plane communication of the trunking UE.

A method, Group Application Server, and mobile device are provided that coordinate an operation of multiple mobile devices of a same user in a group call. When the multiple mobile devices join the group call, a first mobile device of the multiple mobile devices determines that it is an active device and provides an indication of such to the Group Application Server. In response to receiving the indication, the Group Application Server identifies a second mobile device, of the multiple mobile devices, that is a non-active device and one or more of modifies subsequent communications with the second mobile device or conveys a behavior modification message to the second mobile device. In another embodiment of the present invention, the first mobile device may indicate that it is the active device directly to the second mobile device and the second mobile device modify its behavior accordingly.

A method, Group Application Server, and mobile device are provided that coordinate an operation of multiple mobile devices of a same user in a group call. When the multiple mobile devices join the group call, a first mobile device of the multiple mobile devices determines that it is an active device and provides an indication of such to the Group Application Server. In response to receiving the indication, the Group Application Server identifies a second mobile device, of the multiple mobile devices, that is a non-active device and one or more of modifies subsequent communications with the second mobile device or conveys a behavior modification message to the second mobile device. In another embodiment of the present invention, the first mobile device may indicate that it is the active device directly to the second mobile device and the second mobile device modify its behavior accordingly.

An exemplary system and method for dynamic channel allocation in an LMR system includes using one or more preference indicators to dynamically determine a channel allocation priority to be used for channel allocation when channel allocation requests are received. The preference indicators may include a channel failure indicator (e.g. a channel health indicator based on repeater failures), a channel priority indicator, a radio frequency interference indicator, a high reflected power indicator, an excessive current drain indicator, a loss of backbone communications indicator, and a channel usage indicator. If more than one preference indicator is used, the channel priority ranking may be determined using any of a variety of weightings and prioritizations of the various preference indicators to dynamically generate the channel allocation priority. The dynamic channel allocation system may include one or more site controllers, servers, and/or one or more processors configured to implement the method of dynamic channel allocation.

A device, method and system for scanning communication systems of different types is provided. A mobile device comprises: first and second transceivers to communicate first and second communication systems of different types; a memory storing first and second scan lists for scanning first and second channels on the first and second communication systems; and a controller configured to: communicate, using the first transceiver, an indication of the first and second scan lists to a gateway device configured as a proxy for the mobile device to communicate with the first communication systems; receive, using the first transceiver, from the gateway device, a reply indicating that the gateway device is capable of scanning the first communication systems using the first scan list, but is not capable of scanning the second communication systems; and control the second transceiver to scan the one or more second communication systems using the second scan list.

A device, method and system for scanning communication systems of different types is provided. A mobile device comprises: first and second transceivers to communicate first and second communication systems of different types; a memory storing first and second scan lists for scanning first and second channels on the first and second communication systems; and a controller configured to: communicate, using the first transceiver, an indication of the first and second scan lists to a gateway device configured as a proxy for the mobile device to communicate with the first communication systems; receive, using the first transceiver, from the gateway device, a reply indicating that the gateway device is capable of scanning the first communication systems using the first scan list, but is not capable of scanning the second communication systems; and control the second transceiver to scan the one or more second communication systems using the second scan list.

A method is provided that allows for prioritizing Push-To-Talk (PTT) service in a roamed network. PTT service is enabled for a mobile device at a first network. The mobile device roams to a second network that is of an older generation than the first network. It is determined that the mobile device has an active PTT subscription. PTT service is prioritized for the mobile device over circuit switched services on the second network.

One example Land Mobile Radio (LMR) base station includes a network interface and an electronic processor. The electronic processor is configured to receive profile information of a plurality of fifth generation (5G)/Long Term Evolution (LTE) communication devices. The profile information of the plurality of 5G/LTE communication devices may be transmitted (i) over a background gateway communication channel to an LMR communication network that includes the LMR base station and (ii) in response to the 5G/LTE software defined network detecting a fault condition of the first 5G/LTE communication network. The electronic processor is further configured to broadcast a capture beacon based on the profile information and compliant with at least some characteristics of a 5G/LTE communication protocol. The capture beacon is configured to be received by the 5G/LTE communication device to reconfigure the 5G/LTE communication device for communication compliant with an LMR communication protocol.