A method for regrouping multiple groups and a device are provided. The method includes: receiving, by a first group management functional entity, a group regrouping creation message sent by first UE, where the group regrouping creation message includes identifiers of N MCPTT groups, and the group regrouping creation message is used to request the first group management functional entity to create, according to the identifiers of the N MCPTT groups, a temporary group which is initiated by a first MCPTT user and into which the N MCPTT groups are regrouped; and the first MCPTT user belongs to at least one MCPTT group of the N MCPTT groups; and configuring information about the temporary group, where the information about the temporary group includes an identifier of the temporary group into which the N MCPTT groups are regrouped, and the identifiers of the N MCPTT groups.

A method and subscriber unit provide mission critical talkgroup service while minimizing truncation and delay when at least one member talkgroup radio is on a Broadband LTE (Long Term Evolution) system. A dual-mode subscriber unit preferably obtains LMR coverage map data to predict the entry point and remaining duration for when the subscriber unit will operate in the backup LTE system. The subscriber unit falls back to the LTE system when the subscriber unit is out of the coverage area of the LMR system. Because the subscriber unit set the connected state prior to using the LTE network and continuously optimizes RRC mode parameters, audio truncation and call delay are greatly reduced without draining the battery of the subscriber unit.

A system is disclosed in which a mobile communication device establishes device-to-device (D2D) communication with another mobile communication device, and searches for a communication network whilst engaged in the D2D communication. When it finds a communication network, the mobile communication device indicates that it is engaged in the D2D communication. The mobile communication device continues, or does not continue, the D2D communication based on an authorisation by the communication network.

Methods and apparatus for supporting multiple emergency users in a push-to-talk group. The methods include receiving a first emergency alert from a first user device in the push-to-talk group; receiving a second emergency alert from a second user device in the push-to-talk group; causing the first emergency alert and second emergency alert to be provided to each of the console devices in the push-to-talk group; receiving, from the first user device, a first communication and receiving, from the second user device, a second communication; causing the first communication and the second communication to each of the console devices in the push-to-talk group. The methods further include receiving, from a first console device, a selection of one of the first user device and the first emergency alert; and, in response subsequently selectively routing a third communication from the first user device to the first console device and not to a second console device in the push-to-talk group.

Methods and apparatus for supporting multiple emergency users in a push-to-talk group. The methods include receiving a first emergency alert from a first user device in the push-to-talk group; receiving a second emergency alert from a second user device in the push-to-talk group; causing the first emergency alert and second emergency alert to be provided to each of the console devices in the push-to-talk group; receiving, from the first user device, a first communication and receiving, from the second user device, a second communication; causing the first communication and the second communication to each of the console devices in the push-to-talk group. The methods further include receiving, from a first console device, a selection of one of the first user device and the first emergency alert; and, in response subsequently selectively routing a third communication from the first user device to the first console device and not to a second console device in the push-to-talk group.

Applications such as interworking between mission critical push-to-talk (MCPTT) and terrestrial trunked radio (TETRA) networks is not feasible due to absence of vendor-independent protocol for location information exchange between the MCPTT and TETRA networks. The disclosure herein generally relates to telecommunication networks, and, more particularly, to a method and a network for location information exchange between the MCPTT and TETRA networks. Protocols are defined for facilitating location information exchange between a MCPTT server and a TETRA location server, for various triggers including Periodic, CellChange, Immediate Request, PowerOn, and EnterService. In the event of any of these triggers, an Interworking Module (IM) situated between the MCPTT server and the TETRA location server performs mapping between Session Initiation Protocol (SIP) messages from the MCPTT and Location Information Protocol (LIP) messages from the TETRA location server to facilitate the location information exchange between the MCPTT server and the TETRA location server.

The present invention introduces a system, which comprises a telecommunication network structure, which can be called as an intelligent combination of Push-To-Talk (i.e. Direct Mode Operation, DMO) communication technique and cellular network application. The DMO can be set as a preferred choice if it is available. The subscriber devices retransmit (i.e. forward) the data message further until the message reaches the called subscriber terminal. The total cumulative hop between subscriber terminals may comprise both DMO-based hops and cellular connections. ID means are provided, and telemetric information can be sent from the terminals. The invention allows emergency information submissions from the terminals, and forced broadcast information from an administrator to the terminals as well. Dynamic Talk Groups (DTG) can be defined based on geographic locations on each registered user.

One embodiment is directed to a system comprising a first converter unit configured to receive a first modulated enterprise signal from an enterprise base station, demodulate the first modulated enterprise signal, extract enterprise data from the demodulated enterprise signal, and transmit the enterprise data to a modem over a wideband wireless communication network. The system further comprises a second converter unit configured to receive the enterprise data from the modem. The modem is configured receive the enterprise data from the wideband wireless communication network. The system is configured to create a second modulated enterprise signal corresponding to the first modulated enterprise signal using the enterprise data and wirelessly transmit the second modulated enterprise signal to an enterprise mobile station.

A system is disclosed in which a mobile communication device establishes device-to-device (D2D) communication with another mobile communication device, and searches for a communication network whilst engaged in the D2D communication. When it finds a communication network, the mobile communication device indicates that it is engaged in the D2D communication. The mobile communication device continues, or does not continue, the D2D communication based on an authorisation by the communication network.

One embodiment is directed to a system comprising a first converter unit configured to receive a first modulated enterprise signal from an enterprise base station, demodulate the first modulated enterprise signal, extract enterprise data from the demodulated enterprise signal, and transmit the enterprise data to a modem over a wideband wireless communication network. The system further comprises a second converter unit configured to receive the enterprise data from the modem. The modem is configured receive the enterprise data from the wideband wireless communication network. The system is configured to create a second modulated enterprise signal corresponding to the first modulated enterprise signal using the enterprise data and wirelessly transmit the second modulated enterprise signal to an enterprise mobile station.