US Patent No. 9,585,107

PHR PROCESSING METHOD AND DEVICE IN CARRIER AGGREGATION SYSTEM


Patent No. 9,585,107
Issue Date February 28, 2017
Title Phr Processing Method And Device In Carrier Aggregation System
Inventorship Fangli Xu, Beijing (CN)
Yali Zhao, Beijing (CN)
Assignee China Academy Of Telecommunications Technology, Beijing (CN)

Claim of US Patent No. 9,585,107

1. A power headroom reporting (PHR) processing method in a carrier aggregation system, comprising:
acquiring, at user equipment, a pathloss change corresponding to an uplink carrier which is in an activation state at present;
determining, by said user equipment based on said pathloss change, whether a PHR is to be triggered or not;
acquiring power headroom (PH) information to be reported and reporting said PH information, by said user equipment, if said
user equipment determines that said PHR is to be triggered;

wherein a prohibitPHR-Timer and a periodicPHR-Timer are maintained per user equipment, and said determining, by said user
equipment based on said pathloss change, whether a PHR is to be triggered or not comprises:

determining, by said user equipment based on said pathloss change, whether preset trigger conditions are met, if said user
equipment has a new uplink grant (UL Grant) on an uplink carrier, wherein the preset trigger conditions comprise:

said prohibitPHR-Timer times out, and a pathloss change of at least one uplink carrier in said activation state from the most
recent PHR exceeds a preset threshold;

said periodicPHR-Timer times out; and
a PHR function is configured or reconfigured; and
triggering said PHR if one or several of the preset trigger conditions are met; otherwise, not triggering said PHR; and
wherein said acquiring PH information to be reported and reporting said PH information, by said user equipment comprises:
acquiring, by said user equipment, PH information of all uplink carriers in said activation state and making, by said user
equipment, said PH information to be carried in a PHR media access control control element (MAC CE) and reported to a network
side.