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Transmitting and receiving device and method for continuous outer-loop power control while in DTX mode in a CDMA mobile communication system

A mobile communication system, power control technology, applied in the direction of code division multiplexing system, multiplexing communication, transmission control/equalization, etc., can solve the problem of reducing transmission power consumption, wasting transmission power, and increasing frame errors major issues

Inactive Publication Date: 2001-08-29
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0043] As a result, unnecessary transmit power is wasted when frame transmission restarts and the previous threshold is higher than what should be set for error-free reception of the current frame
On the other hand, if the previous threshold is lower than the desired threshold, the frame error increases
The increase of frame errors and the consumption of transmission power reduce the communication quality and base station capacity

Method used

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  • Transmitting and receiving device and method for continuous outer-loop power control while in DTX mode in a CDMA mobile communication system
  • Transmitting and receiving device and method for continuous outer-loop power control while in DTX mode in a CDMA mobile communication system
  • Transmitting and receiving device and method for continuous outer-loop power control while in DTX mode in a CDMA mobile communication system

Examples

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no. 1 example

[0148] When the communication state transitions to another communication state, the threshold value of the previous state is maintained in the transition state, and then changed to a new threshold value suitable for the transition state through the outer loop power control operation. For example, if the preset threshold increment step size and the difference between the threshold value before state transition and the threshold value after state transition is greater than the step size, the outer loop power controller changes the previous threshold value to be used for transition within a predetermined time Status threshold.

[0149] FIG. 21A is a block diagram of a receiver of a mobile station capable of performing outer loop power control in a shortened time and updating a previous threshold for a switching state in a synchronous CDMA mobile communication system according to an embodiment of the present invention. The same parts as those shown in Fig. 8 will be omitted.

[0...

no. 2 example

[0166]The purpose of gated transmission is to reduce interference and power consumption by only transmitting control signals (pilot and PCB) in gated mode when there is no traffic signal to be transmitted in the control hold state. In the control hold state, hardly any traffic signals are generated to be transmitted. Therefore, in most cases only control signals are sent in strobe mode. In order to ensure the receiving performance of the traffic signal transmitted in the strobe transmission mode, the transmission power of the control signal and the traffic signal should be set higher than in the active state. In the embodiment of the present invention, the transmission power of the control signal transmitted in the gating mode is kept the same as that in the active state, and in this state, when the traffic signal to be transmitted is generated, the gain of the transmission power of the control traffic signal, And when there is no service signal, the transmission power is min...

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Abstract

A device and method for continuous outer-loop power control on a physical channel which transmits only power control bits and no data while in discontinuous transmission (DTX) mode in a CDMA mobile communication system is disclosed. In the power controlling device according to one aspect of the present invention, a frame error detector detects an error from a frame of predetermined length and generates an error signal indicating whether an error has been generated. A closed-loop power controller compares a threshold with the signal-to-noise ratio (SNR) in each power control group (PCG) in a plurality of periods of the frame and generates power control information according to the comparison result. An outer-loop power controller increases the threshold in order to generate power control information that commands a power increase in response to an error signal indicating the existence of a frame error, and decreases the threshold in order to generate power control information that commands a power decrease in response to an error signal indicating the absence of a frame error. An offset controlling unit, which is connected to the outer-loop power controller, receives gating information about the gated transmission of data in a frame at a predetermined rate, and generates an offset signal, which indicates an offset corresponding to a changed gating rate if the gating rate is changed.

Description

Background of the invention [0001] 1. field of invention [0002] The present invention generally relates to an apparatus and method for outer-loop and closed-loop power control of a CDMA (Code Division Multiple Access) mobile communication system in DTX (Discontinuous Transmission Mode) mode, and more particularly to a method for transmitting only power control bits (PCBs) without data A device and method for performing continuous outer loop power control on a physical channel. [0003] 2. Related technical description [0004] In the IS-2000 standard, packet transmission is implemented in three ways: the P1 option using the basic traffic channel and the supplementary channel (SCH), the P2 option using the basic traffic channel and the dedicated control channel (DCCH), and the basic traffic channel , P3 options of DCCH and SCH. Traffic channels and DCCH transmit control information and signaling messages related to packets, and SCH transmit packet data. Control informat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/76H04B7/005H04W52/08H04W52/12H04W52/20H04W52/26H04W52/28H04W52/36H04W52/44
CPCH04W52/12H04W52/44H04W52/287H04W52/08H04W52/20H04W52/36Y02B60/50H04W52/26H04B1/76
Inventor 尹裕皙尹淳暎孟胜柱
Owner SAMSUNG ELECTRONICS CO LTD
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