Methods and arrangements for downlink multi-carrier power control in a wireless communications system

摘要

A method, User Equipment (UE), and radio base station or NodeB for controlling the downlink transmit power of a Fractional Downlink Physical Control Channel (F-DPCH) in a multi-carrier High-Speed Packet Access (HSPA) system. Single-carrier Transmit Power Control (TPC) commands are modified to support different kinds of multi-carrier scenarios. The UE defines at least one TPC command for adjustment of the transmit power of the F-DPCH of N downlink carriers, the number of TPC commands being equal to or less than N, and transmits the TPC command(s) on at least one of M uplink carriers. The NodeB receives the TPC command(s) and adjusts the transmit power of the F-DPCH of the N downlink carriers based on the received TPC command(s).

主权项

1. A method of downlink transmit power control (TPC) in a radio base station of a multi-carrier wireless communication system, wherein the radio base station transmits on N downlink carriers and receives on M uplink carriers in communication with at least one user equipment, and wherein N and M are integers and the sum of N and M is equal to or larger than three, said method comprising the steps of:
receiving a TPC command on at least one of the M uplink carriers from the at least one user equipment, the number of received TPC commands being equal to N, the receiving step comprising the sub steps of:
receiving both a first and at least a second of said N TPC commands on a first uplink carrier while receiving each of the remaining TPC commands on separate subsequent uplink carriers from the at least one user equipment, when M is smaller than N; andreceiving the N TPC commands on separate uplink carriers from the at least one user equipment, when M is larger than or equal to N; and adjusting a transmit power of a fractional downlink control channel (FDPCH) on the N downlink carriers based on the received at least one TPC command.