Method and apparatus for controlling power during a dispatch group call

In a wireless communication system, the communication system providing communication services for a plurality of mobile stations, wherein the plurality of mobile stations are in communication with a base station via a first communication resource, and wherein the base station is in communication with the plurality of mobile stations via a second communication resource, an apparatus for controlling power during a dispatch group call, the apparatus comprising:

• a receiving unit being operable to receive transmissions from the plurality of mobile stations via the first communication resource;
• and
• a controller operatively coupled to the receiving unit, the controller comprising a processor and a memory operatively coupled to the processor,
• the controller being programmed to provide a power request authorization to at least one of the plurality of mobile stations based on a power requirement of each of the plurality of mobile stations;
• the controller being programmed to monitor for a transmission from the plurality of mobile stations via the first communication resource during a time period,
• the controller being programmed to adjust transmission power associated with the second communication resource based on the transmission from the plurality of mobile stations via the first communication resource,
• the controller being programmed to determine whether the transmission power associated with the second communication resource is above a transmission power threshold, and the controller being programmed to terminate transmissions to the plurality of mobile stations via the second communication resource in response to a failure to receive the transmission from the plurality of mobile stations via the first communication resource during the time period and a failure to detect the transmission power associated with the second communication resource being above the transmission power threshold.

In a wireless communication system for providing communication services for a plurality of mobile stations, wherein the plurality of mobile stations are in communication with a base station via a first communication resource, and wherein the base station is in communication with the plurality of mobile stations via a second communication resource, and wherein a processor operates in accordance with a computer program embodied on a computer-readable medium for controlling power during a group dispatch call, the computer program comprising:

• a first routine that directs the processor to monitor for a transmission from the plurality of mobile stations via the first communication resource during a time period, wherein the first routine comprises a routine that directs the processor to provide a power request authorization to at least one of the plurality of mobile stations based on a power requirement of each of the plurality of mobile stations;
• a second routine that directs the processor to adjust transmission power associated with the second communication resource based on the transmission from the plurality of mobile stations via the first communication resource;
• a third routine that directs the processor to determine whether the transmission power associated with the second communication resource is above a transmission power threshold;
• and
• a fourth routine that directs the processor to terminate transmissions to the plurality of mobile stations via the second communication resource in response to a failure to receive the transmission from the plurality of mobile stations via the first communication resource during the time period and a failure to detect the transmission power associated with the second communication resource being above the transmission power threshold.

In a wireless communication system, the communication system providing communication services for a plurality of mobile stations, wherein the plurality of mobile stations are in communication with a base station via a first communication resource, and wherein the base station is in communication with the plurality of mobile stations via a second communication resource, a method for controlling power during a dispatch group call, the method comprising:

• storing a first transmission value and a second transmission value associated with each of the plurality of mobile stations, the first transmission value corresponding to a first transmission and the second transmission value corresponding to a second transmission from the respective mobile stations;
• providing a power request authorization to one of the plurality of mobile stations based on the first transmission value and the second transmission value;
• monitoring for a third transmission from the plurality of mobile stations via the first communication resource during a time period;
• adjusting transmission power associated with the second communication resource based on the third transmission from the plurality of mobile stations via the first communication resource;
• determining whether the transmission power associated with the second communication resource is above a transmission power threshold;
• and
• terminating transmissions to the plurality of mobile stations via the second communication resource in response to a failure to receive the third transmission from the plurality of mobile stations via the first communication resource during the time period and a failure to detect the transmission power associated with the second communication resource being above the transmission power threshold.