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 in a user equipment of a multi-carrier wireless communication system, wherein the user equipment receives on N downlink carriers and transmits on M uplink carriers in the communication with at least one radio base station, and wherein the sum of N and M is equal to or larger than three, said method comprising the steps of:
defining at least one transmit power control, TPC, command to be used by the at least one radio base station for adjusting the transmit power of a fractional downlink physical control channel, F-DPCH, on the N downlink carriers, the number of defined TPC commands being equal to N; and transmitting the N TPC commands on at least one of the M uplink carriers, the transmitting step comprising the sub steps of:
transmitting both a first and at least a second of said N TPC commands on a first uplink carrier and each of the remaining TPC commands on separate subsequent uplink carriers, in order to fit all N TPC commands onto the M uplink carriers when M is smaller than N; andtransmitting each of said N TPC commands on separate uplink carriers when M is larger than or equal to N.