Power headroom report generation

Abstract

Apparatuses, methods, and systems are disclosed for power headroom report generation. One method (900) includes aggregating (902) multiple serving cells. The method (900) includes determining (904) that a power headroom report is triggered. The method (900) includes determining (906) that an uplink resource for a new transmission on a serving cell of the multiple serving cells is allocated at a first time after the power headroom report is triggered. The method (900) includes determining (908) a power headroom value for each serving cell of the multiple serving cells being activated based on information received prior to and including a predetermined time before the start of the uplink resource at the first time. The method (900) includes generating (910) a power headroom report medium access control control element including at least the power headroom value for each serving cell of the multiple serving cells being activated.