Component carrier uplink maximum transmission power reporting scheme for carrier aggregation

Abstract

Embodiments of the present disclosure describe method, apparatus, and system configurations for reporting uplink maximum transmission power for each component carrier of a carrier aggregation scheme. A method includes establishing, by a user equipment (UE), a communication link with an enhanced node B (eNB) station of an Internet Protocol (IP) based wireless communication network, and sending, by the UE to the eNB station, a message that includes information for a Power Headroom Report (PHR) and a value that indicates an uplink maximum transmission power P CMAX,c for individual active component carriers of a carrier aggregation scheme. Other embodiments may be described and/or claimed.

What is claimed is: 
     
         1 . A method to report uplink maximum transmission power, comprising:
 reporting, by a user equipment (UE) to an enhanced Node B (eNB) station that communicates with the UE, a first message that includes information for a power headroom report together with a first value that indicates an uplink maximum transmission power for individual active component carriers of a carrier aggregation scheme.   
     
     
         2 . The method of  claim 1 , further comprising:
 establishing, by the UE, a communication link with the eNB station of an Internet Protocol (IP) based wireless communication network.   
     
     
         3 . The method of  claim 1 , wherein sending the first message is performed during establishment of the communication link. 
     
     
         4 . The method of  claim 1 , further comprising:
 sending, by the UE to the eNB station, a second message that includes updated information for a Power Headroom Report (PHR) and a second value that indicates an updated uplink maximum transmission power for individual active component carriers of the carrier aggregation scheme.   
     
     
         5 . The method of  claim 4 , wherein sending the second message is performed periodically or based on occurrence of an event. 
     
     
         6 . The method of  claim 1 , wherein the information for the PHR comprises a power headroom value that indicates a difference between the uplink maximum transmission power and an estimated transmission power for individual active component carriers of the carrier aggregation scheme. 
     
     
         7 . The method of  claim 1 , wherein the first value that indicates the uplink maximum transmission power for individual active component carriers of the carrier aggregation scheme is a quantized nominal value that is sent by the UE to the eNB station for the eNB station to schedule resources for uplink transmission by the UE. 
     
     
         8 . The method of  claim 4 , wherein the first message comprises one or more bits to indicate the first value, the first value being a nominal value of the uplink maximum transmission power, wherein the second message comprises one or more bits to indicate the second value, the second value being a nominal value of the updated uplink maximum transmission power. 
     
     
         9 . The method of  claim 8 , wherein the first message and the second message each comprise a Media Access Control (MAC) layer message. 
     
     
         10 . The method of  claim 4 , wherein the second message is sent in response to determining that a difference between the updated uplink maximum transmission power and the reported uplink maximum transmission power is greater than a predetermined threshold. 
     
     
         11 . A system, comprising:
 a processor configured to communicate with an enhanced node B (eNB) station of an Internet Protocol (IP) based wireless communication network via a user equipment (UE); and   a storage medium coupled to the processor, the storage medium having instructions stored thereon, that if executed by the processor, result in:
 reporting, by the UE to the eNB station, a message that includes information for a power headroom report and a value of an uplink maximum transmission power for individual active component carriers of a carrier aggregation scheme. 
   
     
     
         12 . The system of  claim 11 , wherein sending the message is performed during establishment of the communication link with the eNB. 
     
     
         13 . The system of  claim 11 , wherein the information for the power headroom report comprises a power headroom value that indicates a difference between the uplink transmission power and an estimated transmission power for the individual active component carriers of the carrier aggregation scheme. 
     
     
         14 . The system of  claim 11 , wherein the instructions, if executed, further result in sending, by the UE, another message that includes updated information for a power headroom report and another value that indicates an updated uplink maximum transmission power for individual active component carriers of the carrier aggregation scheme. 
     
     
         15 . The system of  claim 13 , wherein sending the another message is performed periodically or based on occurrence of an event. 
     
     
         16 . The system of  claim 11 , wherein the value of the uplink transmission power is reported to the eNB for eNB to schedule resources for uplink transmission by the apparatus. 
     
     
         17 . The system of  claim 13 , wherein the message comprises one or more bits to indicate a quantized nominal value of the uplink transmission power, and
 wherein the another message comprises one or more bits to indicate another quantized nominal value of the updated uplink transmission power.   
     
     
         18 . The system of  claim 16 , wherein:
 the message comprises 8 bits to indicate the quantized nominal value; and   the another message comprises 8 bits to indicate the another quantized nominal value.   
     
     
         19 . The system of  claim 11 , wherein the message and the another message each comprises a Media Access Control (MAC) layer message. 
     
     
         20 . The system of  claim 11 , wherein the processor is further configured to transmit the message via a physical uplink shared channel. 
     
     
         21 . The system of  claim 11 , further comprising:
 one or more antennas, wherein the processor is to communicate with the eNB station via the one or more antennas.   
     
     
         22 . The system of  claim 11 , further comprising:
 a system control module coupled to the processor; and   a communication interface coupled to the system control module.   
     
     
         23 . The system of  claim 22 , wherein the system control module comprises a memory controller module that is coupled to the system memory. 
     
     
         24 . An apparatus, comprising:
 a set of one or more processors to communicate with an enhanced node B (eNB) station of an Internet Protocol (IP) based wireless communication network; and   a storage medium coupled to the set of one or more processors, the storage medium having instructions stored thereon, that if executed by the processor, result in:
 reporting, to the eNB station, a power headroom report message that includes information for a power headroom report and a value of an uplink maximum transmission power for individual active component carriers of a carrier aggregation scheme. 
   
     
     
         25 . The apparatus of  claim 24 , wherein the set of processors comprises a power headroom report (PHR) control module to control sending of the power headroom report message. 
     
     
         26 . The apparatus of  claim 25 , wherein the sending of the PHR message is performed during establishment of the communication link with the eNB. 
     
     
         27 . The apparatus of  claim 25 , wherein the information for the power headroom report comprises a power headroom value that indicates a difference between the uplink transmission power and an estimated transmission power for the individual active component carriers of the carrier aggregation scheme. 
     
     
         28 . The apparatus of  claim 25 , wherein the PHR control module is further adapted to send another message that includes updated information for a power headroom report and another value to indicate an updated uplink maximum transmission power for individual active component carriers of the carrier aggregation scheme. 
     
     
         29 . The apparatus of  claim 25 , wherein sending the another message is performed periodically or based on occurrence of an event. 
     
     
         30 . The apparatus of  claim 25 , wherein the PHR control module is further to report the value of the uplink transmission power to the eNB for the eNB to schedule resources for uplink transmission by the apparatus. 
     
     
         31 . The apparatus of  claim 28 , wherein the power headroom report message comprises one or more bits to indicate a quantized nominal value of the uplink transmission power, and
 wherein the another message comprises one or more bits to indicate another quantized nominal value of the updated uplink transmission power.   
     
     
         32 . The apparatus of  claim 28 , wherein:
 the power headroom report message comprises 8 bits to indicate the quantized nominal value; and   the another message comprises 8 bits to indicate the another quantized nominal value.   
     
     
         33 . The apparatus of  claim 28 , wherein the power headroom report message and the another message each comprises a Media Access Control (MAC) layer message. 
     
     
         34 . The system of  claim 25 , wherein the set of one or more processors is further configured to transmit the power headroom report message via a physical uplink shared channel.