Uplink power control method, device, base station and system

A technology of power control and base station, applied in the field of uplink power control, base station and system, it can solve the problems of not supporting CPC function, not supporting, etc., to achieve the effect of improving cell capacity, reducing transmit power and reducing mutual interference

Active Publication Date: 2013-05-22
亚太卫星宽带通信(深圳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, there are a large number of commercial terminals that do not support CPC technology in commercial networks, and some old base stations do not support CPC function, so CPC technology cannot be used to improve system performance and capacity

Method used

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  • Uplink power control method, device, base station and system
  • Uplink power control method, device, base station and system
  • Uplink power control method, device, base station and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as figure 1 Shown is a flowchart of an uplink power control method provided by Embodiment 1 of the present invention;

[0023] Step S102, after receiving the first subframe of the radio frame, the base station uses the uplink dedicated control channel (E-DCH Dedicated Physical Control Channel, EDPCCH for short) of the first subframe to perform SIR estimation;

[0024] Step S104, the base station judges whether the SIR estimation result of the first subframe exceeds the preset threshold, if so, execute step S105, otherwise execute step S106;

[0025] Among them, the preset threshold can be obtained through system simulation, and the selection principle of the threshold is to meet the false alarm and missed detection requirements stipulated in the protocol.

[0026] Step S105, process according to normal power control, go to step S108;

[0027] In this step, since the SIR estimation result exceeds the threshold, it is considered that the user terminal has uplink da...

Embodiment 2

[0037] In this embodiment, the power control method of the present invention is described by taking the HSUPA user whose transmission interval TTI is 10MS as an example (see also figure 1 ), including the following steps:

[0038] Step S202, for the HSUPA user terminal whose TTI is 10MS, the base station performs SIR estimation on the data of the subframe after collecting the data of the first subframe (0-2 time slot) of the EDPCCH channel of the user terminal .

[0039] Step S204, the base station judges whether the SIR estimation result of the first subframe exceeds a preset threshold (assumed to be M), and if so, executes step S205 to perform processing according to normal power control; otherwise executes step S206 to adjust SIRtarget;

[0040] Step S205, process according to normal power control, go to step S208;

[0041] If the SIR estimation result exceeds the threshold M, it is considered that the user terminal has uplink data to send within the 10MS transmission int...

Embodiment 3

[0053] Such as image 3 Shown is a module structure diagram of an uplink power control device provided in Embodiment 3 of the present invention, the device includes a receiving module 302, an estimating module 304, a judging module 306, and an adjusting module 306, wherein:

[0054] The receiving module 302 is used to receive wireless frames;

[0055] The estimation module 304 is configured to use the first subframe to estimate the signal-to-noise ratio (SIR) after receiving the first subframe of the wireless frame;

[0056] The judging module 306 is used to judge whether the SIR estimation result of the first subframe exceeds a preset threshold;

[0057] The adjustment module 308 is configured to reduce the SIRtarget of the user terminal in subsequent subframes within the TTI when the SIR estimation result of the first subframe does not exceed the preset threshold.

[0058] Specifically, the adjusting module 308 is specifically configured to reduce the SIRtarget by a fixed ...

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Abstract

The invention discloses an uplink power control method which is applicable to wideband code division multiple access (WCDMA) system. The uplink power control method comprises that a base station receives a first subframe of a radio frame, and carries out signal-to-interference ratio (SIR) estimation by using the first subframe, when the result of the SIR estimation of the first subframe does not exceed a preset threshold, a target SIR (SIR target) of a user terminal is reduced in subframes in the back of a transmission time interval (TTI), and thus transmitting power of a high speed uplink packet access (HSUPA) user terminal is reduced. The invention further discloses an uplink power control device, an upper power control base station and an uplink power control system. According to the uplink power control method, the uplink power control device, the upper power control base station and the uplink power control system, the transmitting power of the HSUPA user terminal can be effectively reduced, uplink interference is reduced, and system performance and capacity of the uplink power control system are improved.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to an uplink power control method, device, base station and system in a WCDMA system. Background technique [0002] As we all know, WCDMA is a self-interference system, and the signal of each user terminal in a cell is interference to other user terminals. Therefore, it is a key technology in the WCDMA system how to effectively control the power, reduce the transmission power to the greatest extent, reduce the system interference and increase the system capacity under the premise of ensuring the service quality required by the user terminal. [0003] The enhanced uplink dedicated transmission channel (Enhanced UL DCH, referred to as E-DCH) is introduced in the R6 standard protocol. The introduction of this channel greatly improves the uplink rate of the user terminal, and the peak rate can reach 5.76Mbps. The technology supporting this channel is called High Speed ​​Uplink Pac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/14H04W52/24
CPCH04W52/146H04W52/241H04W52/04H04W28/08Y02B60/50
Inventor 刘渊沈伟
Owner 亚太卫星宽带通信(深圳)有限公司
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