METHOD AND USER EQUIPMENT OF UPLINK POWER CONTROL

摘要

Disclosed are a method and user equipment of uplink power control. The method comprises the steps of: UE determines the target transmission power of uplink signal which transmitted on each synchronization uplink component carrier of current uplink sub-frame; Judging whether PRACH transmission exists on uplink secondary component carrier of current uplink sub-frame; If judged that there is, determining the PRACH target transmission power, and further judging that whether the sum of the uplink signal power and the PRACH target transmission power exceeds the maximum transmission power of UE; If judged exceeded, holding the PRACH target transmission power constant, and reducing the target transmission power of all or part of SC-FDMA symbol of uplink signal which is contained in current uplink sub-frame and needed to reduce power. The technical scheme of present invention is using for uplink power control when PRACH signal is overlap with other uplink signal.

主权项

1. An uplink power control method, comprising:
a User Equipment, UE, determining target transmit power of uplink signals transmitted on respective synchronized uplink component carriers in a current uplink sub-frame; judging whether a Physical Random Access Channel, PRACH, is transmitted on an uplink secondary component carrier in the current uplink sub-frame; if so, then determining target transmit power of the PRACH and further judging whether a sum of the target transmit power of the uplink signals and the target transmit power of the PRACH would exceed maximum transmit power of the UE; if so, then maintaining the target transmit power of the PRACH unchanged, and scaling down target transmit power of all or a part of Single Carrier-Frequency Division Multiple Access, SC-FDMA, symbols of an uplink signal required to be power scaled among the uplink signals in the current uplink sub-frame until a sum of transmit power of the uplink signals in the current uplink sub-frame does not exceed the maximum transmit power of the UE minus the target transmit power of the PRACH.