Method and apparatus for dynamic control of talk groups in a wireless network

In a communication system having a transceiver acting as a master and a plurality of communication devices each potentially acting as slaves to the master, a method of communication comprising the steps at a slave of:

• transmitting a communication request from a first slave of the plurality of communication devices to communicate with at least a second slave of the plurality of communication devices while the master polls the slaves;
• receiving communication resource parameters for communication between the first slave and at least the second slave;
• transmitting an acknowledgement to the master from the first slave and from at least the second slave;
• communicating by the first slave with at least the second slave creating a slave talk group;
• and
• transmitting during the re-polling interval a request to terminate communication between the first slave and at least the second slave when the master polls the slaves at the re-polling interval,
• wherein at the direction of the master the first slave communicates with at least the second slave on a second communication resource while the master polls the slave talk group on a first communication resource at the re-polling interval, the slave talk group temporarily reverting to the first communication resource at the re-polling interval during a parked mode.

A transceiver device acting as a master among a plurality of communication devices potentially acting as slaves to the master, the transceiver device comprising:

• a transmitter;
• a receiver coupled to the transmitter;
• and
• a processor coupled to the transmitter and receiver and programmed to:
• poll the slaves at a first interval;
• receive a communication request from a first slave of the plurality of communication devices to communicate with at least a second slave of the plurality of communication devices when the master polls the slaves;
• designate communication parameters for communication between the first slave and at least the second slave;
• and
• poll at a re-polling interval at a second interval the first slave and at least the second slave to confirm the termination of communication between the first slave and at least the second slave,
• wherein the processor is further programmed to direct the first slave to communicate with at least the second slave on a second communication resource while the master polls the first slave and at least the second slave on a first communication resource at the re-polling interval, wherein the first slave and at least the second slave revert to communication on the first communication resource at the re-polling interval.

A communication device acting as a slave among a plurality of slaves and among a transceiver acting as a potential master to the slave, the slave comprising:

• a transmitter;
• a receiver coupled to the transmitter;
• and
• a processor coupled to the transmitter and receiver and programmed to:
• if attempting to initiate communication with at least a first slave among the plurality of slaves, then transmit a communication request to the potential master during a first polling interval to establish communication between the communication device and at least the first slave and then receive communication resource parameters for communication between the communication device and at least the first slave from the potential master;
• or
• if at least the first slave among the plurality of slaves is attempting to initiate communications with the communication device, then receive communication resource parameters for communication between the communication device and at least the first slave after a transmission by at least the first slave of a communication request to the potential master when the potential master polls the plurality of slaves at the first polling interval;
• and
• communicate under the communication resources parameters with at least the first slave among the plurality of slaves in a parked mode, wherein the parked mode requires the communication device to transmit to the potential master a termination confirmation at a second polling interval that confirms termination of communication with at least the first slave when the communication device terminates communication with at least the first slave,
• wherein the communication device communicates with at least the first slave creating a slave talk group after the potential master initiates the start of communication between the communication device and at least the first slave, and further wherein members of the slave talk group transmit on a first communication resource a termination confirmation at the direction of the potential master when at least one of the members of the slave talk group requests a call termination of another member of the slave talk group on a second communication resource and when the potential master polls the slave talk group at the second interval by sending a broadcast signal directing predetermined members of the slave talk group to transmit the termination confirmation on the first communication resource.

A communication device acting as a slave among a plurality of slaves and among a transceiver acting as a potential master to the slave, the slave comprising:

• a transmitter;
• a receiver coupled to the transmitter;
• and
• a processor coupled to the transmitter and receiver and programmed to:
• if attempting to initiate communication with at least a first slave among the plurality of slaves, then transmit a communication request to the potential master during a first polling interval to establish communication between the communication device and at least the first slave and then receive communication resource parameters for communication between the communication device and at least the first slave from the potential master;
• or
• if at least the first slave among the plurality of slaves is attempting to initiate communications with the communication device, then receive communication resource parameters for communication between the communication device and at least the first slave after a transmission by at least the first slave of a communication request to the potential master when the potential master polls the plurality of slaves at the first polling interval;
• and
• communicate under the communication resources parameters with at least the first slave among the plurality of slaves in a parked mode, wherein the parked mode requires the communication device to transmit to the potential master a termination confirmation at a second polling interval that confirms termination of communication with at least the first slave when the communication device terminates communication with at least the first slave,
• wherein the communication device communicates with at least the first slave creating a slave talk group after the potential master initiates the start of communication between the communication device and at least the first slave, and further wherein the communication device transmits on a second communication resource a call termination request to at least the first slave and the first slave responds to the call termination on the second communication resource, whereupon the communication device and at least the first slave transmit a termination confirmation on a first communication resource.