Monitoring and control of transmit power in a multi-modem wireless communication device
A method ( 100 ) for limiting transmission power of a communication device ( 600 ) having a plurality of transceivers ( 610, 615 ). The method can include determining a desired maximum transmission power and determining a plurality of power contribution factors. Each of the power contribution factors can be associated with a respective one of the transceivers. The method also can include determining an expected transmission power based on, at least in part, a sum of the power contribution factors. Further, responsive to the expected transmission power exceeding the desired maximum transmission power, the power contribution for at least one of the transceivers can be selectively reduced or terminated.
1. A method for limiting transmission power of a communication device having a plurality of transceivers, comprising:
determining a desired maximum transmission power;
determining a plurality of power contribution factors, each of the power contribution factors associated with a respective one of the transceivers and being determined based on an estimated bit rate of a data stream allocated to the respective transceiver;
determining an expected transmission power based on, at least in part, a sum of the power contribution factors;
responsive to the expected transmission power exceeding the desired maximum transmission power, selectively reducing or terminating the power contribution for at least one of the transceivers by re-assigning a service currently active on the transceiver to a second of the transceivers; and
wherein selectively reducing or terminating the power contribution for at least one of the transceivers comprises:
prioritizing each of a plurality of services active on the communication device; and
reducing the power contribution for at least one of the services having a low priority.
2. The method of claim 1 , wherein selectively reducing the power contribution comprises reducing a bit rate of a data stream for the at least one of the transceivers.
3. The method of claim 1 , wherein selectively reducing the power contribution comprises reducing a duty cycle of a data stream for the at least one of the transceivers.
4. The method of claim 1 , wherein selectively terminating the power contribution comprises halting communication on at least one of the transceivers.
5. The method of claim 1 , wherein prioritizing the services comprises determining a quality of service class associated with each of the services.
6. The method of claim 1 , wherein reducing the power contribution for at least one of the services having a low priority comprises reducing a bit rate of a service data stream for the service.
7. The method of claim 1 , wherein reducing the power contribution for at least one of the services having a low priority comprises reducing a duty cycle of a service data stream for the service.
8. The method of claim 1 , wherein selectively reducing or terminating the power contribution for at least one of the transceivers by re-assigning a service currently active on the transceiver to a second of the transceivers comprises:
selectively reducing the power contribution for at least one of the transceivers by re-assigning a first service currently active on the transceiver to a second of the transceivers;
the method further comprising granting a new service request pursuant to reducing the power contribution for at least one of the transceivers.
9. A method for limiting transmission power of a communication device having a plurality of transceivers, comprising:
receiving a request for an increase in instantaneous transmit power of a service data stream being transmitted by a first of the transceivers;
determining a desired maximum transmission power;
determining a plurality of power contribution factors, each of the power contribution factors associated with a respective one of the transceivers;
determining an expected transmission power based on, at least in part, a sum of the power contribution factors that are based on estimated bit rates of data streams;
responsive to the expected transmission power exceeding the desired maximum transmission power, selectively reducing the power contribution for at least one of the transceivers by reducing a bit rate of a service data stream being transmitted by a second of the transceivers without terminating the service data stream being transmitted by the second transceiver;
increasing an energy per bit of the service data stream being transmitted by the first transceiver; and
wherein selectively reducing or terminating the power contribution for at least one of the transceivers comprises:
prioritizing each of a plurality of services active on the communication device; and
reducing the power contribution for at least one of the services having a low priority.
10. A communication device, comprising:
a plurality of transceivers; and
a controller that:
determines a desired maximum transmission power;
determines a plurality of power contribution factors, each of the power contribution factors associated with a respective one of the transceivers and being determined based on an estimated bit rate of a data stream allocated to the respective transceiver;
determines an expected transmission power based on, at least in part, a sum of the power contribution factors;
responsive to the expected transmission power exceeding the desired maximum transmission power, selectively reduces or terminates the power contribution for at least one of the transceivers by re-assigning a service currently active on the transceiver to a second of the transceivers; and
wherein the controller prioritizes each of a plurality of services active on the communication device and reduces the power contribution for at least one of the services having a low priority.
11. The communication device of claim 10 , wherein the controller selectively reduces a bit rate of a data stream for the at least one of the transceivers in order to selectively reduce the power contribution.
12. The communication device of claim 10 , wherein the controller selectively reduces a duty cycle of a data stream for the at least one of the transceivers in order to selectively reduce the power contribution.
13. The communication device of claim 10 , wherein the controller prioritizes the services by determining a quality of service class associated with each of the services.
14. The communication device of claim 10 , wherein the controller reduces a bit rate of a service data stream for the service having the low priority.
15. The communication device of claim 10 , wherein the controller reduces a duty cycle of a service data stream for the service having the low priority.
16. A communication device comprising:
a plurality of transceivers; and
a controller that:
receives a request for an increase in instantaneous transmit power of a service data stream being transmitted by a first of the transceivers;
determines a desired maximum transmission power;
determines a plurality of power contribution factors, each of the power contribution factors associated with a respective one of the transceivers;
determines an expected transmission power based on, at least in part, a sum of the power contribution factors that are based on estimated bit rates of data streams;
responsive to the expected transmission power exceeding the desired maximum transmission power, selectively reduces the power contribution for at least one of the transceivers by reducing a bit rate of a service data stream being transmitted by a second of the transceivers without terminating the service data stream being transmitted by the second transceiver, and increases an energy per bit of the service data stream being transmitted by the first transceiver; and
wherein the controller prioritizes each of a plurality of services active on the communication device and reduces the power contribution for at least one of the services having a low priority.
17. A non-transitory program storage device readable by a machine, having stored thereon a program of instructions executable by the machine to perform method steps for limiting transmission power of a communication device having a plurality of transceivers, said method steps comprising:
determining a desired maximum transmission power;
determining a plurality of power contribution factors, each of the power contribution factors associated with a respective one of the transceivers and being determined based on an estimated bit rate of a data stream allocated to the respective transceiver;
determining an expected transmission power based on, at least in part, a sum of the power contribution factors;
responsive to the expected transmission power exceeding the desired maximum transmission power, selectively reducing or terminating the power contribution for at least one of the transceivers by re-assigning a service currently active on the transceiver to a second of the transceivers; and
wherein selectively reducing or terminating the power contribution for at least one of the transceivers comprises:
prioritizing each of a plurality of services active on the communication device; and
reducing the power contribution for at least one of the services having a low priority.