Uplink power control for channel aggregation in a communication network
View Patent ↗A system and method for uplink power control for aggregated channels in a communication network includes a step 300 of defining power scaling parameters to be used to derive power scaling factors to be applied to associated aggregated uplink channels. A next step 302 includes providing the power scaling parameters to user equipment. A next step 304 includes applying power scaling factors derived from the power scaling parameters to the associated aggregated uplink channels when the user equipment will exceed a maximum transmit power.
1. A method for uplink power control for aggregated channels in a communication network, the method comprising the step of:
defining power scaling parameters to be used to derive power scaling factors to be applied to associated aggregated uplink channels;
providing the power scaling parameters to user equipment; and
applying power scaling factors derived from the power scaling parameters to the associated aggregated uplink channels when the user equipment will exceed a maximum transmit power;
wherein defining includes an eNodeB-defined priority list and can direct the UE to drop certain transmissions based on the eNodeB-defined priority list.
2. The method of claim 1 , wherein the providing step includes providing the power scaling parameters in a MAC message.
3. The method of claim 1 , wherein the providing step includes providing the power scaling parameters in RRC signaling.
4. The method of claim 1 , wherein the providing step includes providing the power scaling parameters in a PDCCH assignment.
5. The method of claim 1 , wherein the defining step includes choosing scaling parameters to maintain a required power on an uplink control channel while reducing power on an uplink data channel.
6. The method of claim 1 , wherein the defining step includes choosing the scaling parameters to proportionally reduce transmit power based on a quality-of-service requirement.
7. The method of claim 6 , wherein the quality of service requirement is different for different channels being used.
8. The method of claim 1 , wherein the defining step includes choosing the scaling parameters to proportionally reduce transmit power based on one or more performance metrics.
9. The method of claim 1 , wherein the defining step includes choosing the scaling parameters based on UE traffic type.
10. The method of claim 1 , wherein the scaling factors can be applied as a uniform scaling where a single scaling factor is applied to all channels.
11. The method of claim 1 , wherein the defining step includes choosing the scaling parameters based on carrier type in a heterogeneous network.
12. The method of claim 11 , wherein the carrier type is based on eNB type.