REPORTING POWER HEADROOM FOR AGGREGATED CARRIERS

摘要

A method at a wireless access node, comprising:receiving power headroom-related information for a number of aggregated carriers that is less than or equal to a total number of aggregated carriers; andreceiving a bitmap, wherein each bit in the bitmap corresponds to one of the aggregated carriers, and one value in the bitmap indicates that the power headroom-related information for a corresponding carrier is being transmitted, and another value indicating that the power headroom-related information for a corresponding carrier is not being transmitted.;The power headroom-related information comprises one of power headroom and path loss information, and is received after the occurrence of one of: a change in the path loss of a reporting carrier greater than a pre-defined amount since a previous power headroom report, addition of a carrier to the aggregation of carriers, and expiration of a timer that controls periodic power headroom reports.