Satellite trunked radio service system

In a mobile satellite system including at least one satellite for receiving/transmitting a message from/to a mobile communication system, a method of providing secure access to a closed user group communication, comprising the steps of:

• (a) transmitting a NET radio request indicating the NET radio is being requested for a NET group associated therewith;
• (b) allocating a frequency for the NET radio, and transmitting the frequency to the NET group;
• (c) tuning by the NET group to the frequency in response to said allocating step (b);
• and
• (d) accessing by the NET group the closed user group communication responsive to issuance of a security message for authorized access thereto;
• (e) executing the closed user group communication responsive to said accessing step (d).

In a mobile satellite system including at least one satellite for receiving/transmitting a message from/to a mobile communication system, a method of providing communication between mobile earth terminals (METs) via a dual standby operation permitting communication alternately between a closed user group arrangement (NET radio) and a mobile telephone service (MTS), said method comprising the steps of:

• (a) transmitting, alternately or substantially simultaneously, a MTS request indicating the MTS is being requested or a NET radio request indicating the NET radio is being requested for a NET group associated therewith;
• (b) allocating a frequency for at least one of the MTS and the NET radio, and transmitting the frequency to at least one of the METs and the NET group;
• (c) tuning by the at least one of the METs and the NET group to the frequency in response to said allocating step (b);
• and
• (d) at least one of the METs alternately selecting between the NET radio request representing the NET radio, and the MTS request representing the MTS.

In a mobile satellite system including at least one satellite for receiving/transmitting a message from/to a mobile communication system, a system for providing communication between multiple users in a closed user group arrangement, comprising:

• at least first and second mobile earth terminals (METs) responsively communicable in the mobile satellite system, and adapted to select a closed user group network identifier (NET ID) representing a NET group;
• and
• at least one controller responsively connectable to the first and second METs via the at least one satellite,
• wherein the at least one of the at least first and second METs adapted to transmit a priority message to at least one of the NET group and a priority NET group, and the at least one of the NET group and the priority NET group adapted to receive the priority message as the communication in the closed user group arrangement.

In a mobile satellite system including at least one satellite for receiving/transmitting a message from/to a mobile communication system, a system for providing communication between multiple users in a closed user group arrangement, comprising:

• at least first and second mobile earth terminals (METs) responsively communicable in the mobile satellite system, and adapted to select a closed user group network identifier (NET ID) representing a NET group including at least the first and second METs;
• and
• at least one controller responsively connectable to the first and second METs via the at least one satellite, the at least one controller adapted to receive the NET ID from the first MET, allocate a frequency for the NET group, and transmit the message to the NET group including the second MET to inform the NET group of the allocated frequency and the communication associated therewith, the second MET adapted to tune to the allocated frequency in response to receiving the message, and one of the at least first and second METs designatable as a speaker for the NET group,
• wherein at least one of the first and second METs adapted to generate a security message for authorized access to the communication, and to tune to the allocated frequency for the NET group using the security message.

In a mobile satellite system including at least one satellite for receiving/transmitting a message from/to a mobile communication system, a system for providing satellite communication between multiple users in a closed user group arrangement, comprising:

• at least first and second mobile earth terminals (METs) responsively communicable in the mobile satellite system, and adapted to select a closed user group network identifier (NET ID) representing a NET group including at least the first and second METs;
• and
• at least one controller responsively connectable to the first and second METs via the at least one satellite, the at least one controller adapted to receive the NET ID from the first MET, allocate a frequency for the NET group, and transmit the message to the NET group including the second MET to inform the NET group of the allocated frequency and the communication associated therewith, the second MET adapted to tune to the frequency in response to receiving the message, and one of the at least first and second METs designatable as a speaker for the NET group,
• wherein the system is further adapted to provide dual standby operation permitting communication between the at least one of the first and second METs in at least one of a closed user group arrangement (NET radio) and a mobile telephone service (MTS).

In a mobile communication system for receiving/transmitting a message from/to a mobile communication device, a system for providing communication between multiple users in a closed user group arrangement, comprising:

• at least first and second mobile communication devices responsively communicable in the mobile communication system, and adapted to select a closed user group network identifier (NET ID) representing a NET group;
• and
• at least one controller responsively connectable to the first and second mobile communication devices,
• wherein the at least one of the at least first and second mobile communication devices adapted to transmit a priority message to at least one of the NET group and a priority NET group, and the at least one of the NET group and the priority NET group adapted to receive the priority message as the communication in the closed user group arrangement.

In a mobile communication system for receiving/transmitting a message, a system for providing communication between multiple users in a closed user group arrangement, comprising:

• at least first and second mobile communication devices responsively communicable in the mobile communication system, and adapted to select a closed user group network identifier (NET ID) representing a NET group including at least the first and second METs;
• and
• at least one controller responsively connectable to the first and second mobile communication devices, the at least one controller adapted to receive the NET ID from the first mobile communication device, allocate a frequency for the NET group, and transmit the message to the NET group to inform the NET group of the allocated frequency, the second mobile communication device adapted to tune to the allocated frequency in response to receiving the message, and one of the at least first and second mobile communication devices designatable as a speaker for the NET group,
• wherein at least one of the first and second mobile communication devices adapted to generate a security message for authorized access to the communication, and to tune to the allocated frequency for the NET group using the security message.

In a mobile communication system including for receiving/transmitting a message, a system for providing communication between multiple users in a closed user group arrangement, comprising:

• at least first and second mobile devices responsively communicable in the mobile communication system, and adapted to select a closed user group network identifier (NET ID) representing a NET group including at least the first and second mobile devices;
• and
• at least one controller responsively connectable to the first and second mobile devices, the at least one controller adapted to receive the NET ID from the first mobile device, allocate a frequency for the NET group, and transmit the message to the NET group including the second mobile device to inform the NET group of the allocated frequency and the communication associated therewith, the second mobile device adapted to tune to the frequency in response to receiving the message, and one of the at least first and second mobile devices designatable as a speaker for the NET group,
• wherein the system is further adapted to provide dual standby operation permitting communication between the at least one of the first and second mobile devices in at least one of the closed user group arrangement (NET radio) and a mobile telephone service (MTS).