Patent ID: 9491719
Filing Date: 2016-11-08
CPC Classification: H04L,H04W

Claim Text:
1. A method of reporting power headroom, wherein the method comprises: a user equipment for which resources of a plurality of network side apparatuses are aggregated determining power headroom information; and the user equipment transmitting the power headroom information to at least one of the network side apparatuses participating in aggregation, wherein before the user equipment transmits the power headroom information to at least one of the network side apparatuses participating in aggregation, the method further comprises: the user equipment determining that a part or all the following conditions to trigger a power headroom report is or are satisfied: the user equipment has an uplink resource for transmission of new data, a PHR prohibitive timer for one of the network side apparatuses expires, and there is at least one activated serving cell, controlled by the network side apparatus, with a path loss change exceeding a downlink path loss change; a power headroom information report function per User Equipment (UE) per evolved Node B (eNB) is configured or reconfigured by a network side higher layer; when uplink activation of a serving cell is configured, the power headroom information of a network side apparatus controlling the serving cell or the power headroom information for all the activated serving cells is triggered to be reported; and there is an uplink resource for transmission of new data, a PHR prohibitive timer for one of the network side apparatuses expires, and for any one activated serving cell, configured with the uplink (UL), controlled by the network side apparatus, if there is uplink transmission or Physical Uplink Control Channel (PUCCH) transmission over the serving cell, and a power fallback required since last transmission of power headroom information is above a threshold, then the power headroom information of the network side apparatus controlling the serving cell or the power headroom information for all the activated serving cells is triggered to be reported.