Method for acquiring reference expected received power

Abstract

The invention discloses a method for acquiring reference expected received power, which is applied to user equipment UE in an idle state or a cell-forward access channel state to use an enhancement-dedicated transport channel to transmit data. The method comprises the following steps that: a network side uses a system message or a high-speed physical confirmation channel to configure the reference expected received power for the user equipment; when initially initiating an enhancement-dedicated transport channel transmission, the UE controls open-loop power and sets a value of the close-loop control quantity Pe-base thereof as the reference expected received power; the UE controls close-loop power and the Pe-base is controlled by a transmission power control TPC command; and when the enhancement-dedicated transport channel transmission of the UE restores transmission after a period of stop, if the stop time is more than or equal to an updating threshold, the EU re-acquires the reference expected received power and sets the Pe-base. By using the system message or the high-speed physical confirmation channel to transmit the reference expected received power, the method allows a terminal in the CELL_FACH state or the IDLE state to achieve the effect of controlling the close-loop power.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a method for obtaining reference expected received power in CELL_FACH (cell_forward access channel) state and idle state in a time division synchronous code division multiple access system. Background technique [0002] 3GPP (Third Generation Partnership for Mobile Communications) is currently working on the standardization of CELL_FACH (Cell_Forward Access Channel) state uplink enhancement. CELL_FACH uplink enhancement enhances the uplink packet data transmission performance of this state by introducing an enhanced-dedicated transport channel (E-DCH) in the CELL_FACH state, so that it can obtain a smaller packet transmission delay and a higher transmission rate. [0003] E-DCH transmission is commonly referred to as HSUPA (High Speed ​​Uplink Packet Access). HSUPA uses advanced physical layer technology to obtain high transmission efficiency. In versions before 3GP...

AI Technical Summary

Problems solved by technology

However, when a UE in the Idle state initiates E-DCH transmission, it does not have any dedicated signaling information, how to obtain the reference expected received power is a problem; for a UE already in the CELL_FACH state, even if the RNC configures There is a reference expected received power. Since there is no dedicated connection on the Iub interface in this state, this value cannot be configured to Node B, so that the consistency between UE and Node B cannot be maintained.

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