Automatic control equipment and method for time division-code division multiple address connection mobile terminal
A mobile terminal and automatic control system technology, applied in the direction of time division multiplexing usage, transmission control/equalization, communication between multiple stations, etc., can solve the problems of difficult filter combination, equipment size increase, etc., to achieve The effect of simplifying PCB layout
Inactive Publication Date: 2004-06-09
LG ELECTRONICS INC
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In addition, since the filter includes passive components, it is difficult to incorporate the filter into an IC chip, resulting in a corresponding increase in device size
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[0026] Generally, in a time division duplex (TDD) based mobile communication system such as TD-SCDMA, the transmit and receive channels of a mobile terminal are determined by time rather than frequency. Therefore, when a mobile terminal is in receive mode, its transmit channel is idle. The automatic control device according to the invention uses this time characteristic based on the separation of transmit / receive channels. An automatic control signal generated in the baseband modem is transmitted to a transmit / receive (Tx / Rx) module in receive mode through a data transmit line instead of an additional control signal line.
[0027] image 3 is a block diagram showing an automatic control device of a mobile terminal according to an embodiment of the present invention. Such as image 3 As shown, the automatic control device includes a baseband modem 200 and an RF processing module 100 connected to each other through a transmitting data line 500 and a receiving data line 600 . ...
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The automatic control system of a mobile terminal for time division duplex (TDD) based communication system includes an RF processing module which controls quality of a transmission channel, and a baseband modem connected to the RF processing module through a transmission data line and a reception data line. The baseband modem generates automatic control signals based on control information received from a base station and transmitting the automatic control signal to the RF processing module through the transmission data line in a reception mode of the mobile terminal. The automatic control signals are transmitted to the RF processing module through the transmission data line, which is in the idle state, in the reception mode. Additional control lines are not required to transmit the respective automatic control signals. Therefore, utilization of the transmit data line between the baseband modem and the RF processing module can be improved.
Description
technical field [0001] The present invention relates to a mobile communication system, in particular to a device and method for automatic control of Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) terminals. Background technique [0002] Generally, in a mobile communication system, a base station performs uplink power control and maximizes system capacity in order to solve a near-far problem in a cell. Uplink power control can be divided into uplink open-loop power control and uplink closed-loop power control. The transmit power of a terminal in uplink open loop power control is determined by the average power received by the base station over all Code Division Multiple Access (CDMA) channels. After transmission initialization of an uplink channel is performed by open-loop power control, the power control method changes to closed-loop power control so that transmission power of a terminal is determined by a power control signal received from a base statio...
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IPC IPC(8): H04L5/22H04B7/005H04B7/26
CPCH04W52/52H04W88/02H04B7/26
Inventor 刘载旭
Owner LG ELECTRONICS INC