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A method, device, base station and system for uplink power control

A power control and base station technology, applied in power management, wireless communication, electrical components, etc., can solve the problems of not supporting the CPC function, not supporting, etc., to achieve the effect of improving cell capacity, reducing transmission power, and reducing mutual interference

Inactive Publication Date: 2018-02-23
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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  • A method, device, base station and system for uplink power control
  • A method, device, base station and system for uplink power control
  • A method, device, base station and system for uplink power control

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 present invention discloses an uplink power control method, which is suitable for WCDMA systems. The method includes: after receiving the first subframe of a wireless frame, the base station uses the first subframe to estimate the signal-to-noise ratio (SIR); if the first subframe If the SIR estimation result of the frame does not exceed the preset threshold, then the target signal-to-noise ratio (SIRtarget) of the user terminal is reduced in subframes following the transmission time interval TTI. Thereby reducing the transmit power of the HSUPA user terminal. The invention also discloses an uplink power control device, a base station and a system. Through the invention, the transmission power of the HSUPA user terminal can be effectively reduced, the uplink interference can be reduced, and system performance and capacity can be 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 Patents(China)
IPC IPC(8): H04W52/14H04W52/24
CPCH04W52/241H04W52/146
Inventor 李杰宋振林陈亚琴
Owner 亚太卫星宽带通信(深圳)有限公司
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