CN104219750A - Closed-loop power control method - Google Patents
Closed-loop power control method Download PDFInfo
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- CN104219750A CN104219750A CN201310216498.0A CN201310216498A CN104219750A CN 104219750 A CN104219750 A CN 104219750A CN 201310216498 A CN201310216498 A CN 201310216498A CN 104219750 A CN104219750 A CN 104219750A
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- sinr
- interference
- function
- loop power
- adjacent area
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Abstract
The invention discloses a closed-loop power control method. The method includes the steps: when a base station needs closed-loop power control for UE (user equipment), a jamming adjustment coefficient t is determined according to current intensity of jamming of the UE upon an adjacent cell and according to preset setting rules, including t referring to a non-increasing or non-decreasing function of the intensity of jamming of the UE upon the adjacent cell; the base station determines a target signal to interference plus noise ratio SINR<target> according to SINR<target>=SINR<init>+h(t), with SINR<init> referring to a preset initial value of signal to interference plus noise ratio, in one setting rule case that t refers to the non-decreasing function of the intensity of jamming of the UE upon the adjacent cell, h(t) refers to an independent variable to t and a decreasing function to t, and in the other setting rule case that t refers to the non-decreasing function of the intensity of jamming of the UE upon the adjacent cell, h(t) refers to an independent variable to t and an increasing function to t; the base station adjusts an uplink transmitting power of the UE according to the target signal to interference plus noise ratio and informs the UE. The method has the advantage that inter-cell jamming can be effectively decreased during closed-loop power control.
Description
Technical field
The present invention relates to mobile communication technology, particularly relate to a kind of close-loop power controlling method.
Background technology
At present, behavior distributed AC servo system in LTE system, during whole network employing identical networking scheme, Physical Uplink Shared Channel (Physical Uplink Shared CHannel, PUSCH) more serious presence of intercell interference can be there is, thus affect uplink throughput.
LTE uplink power control technology is one of important technology controlling presence of intercell interference.Existing close-loop power control technology stresses to receive the parametric statistics such as Signal to Interference plus Noise Ratio (SINR) and Block Error Rate (bler) to user, adjusts user's transmitted power according to statistical property by adjustment aim SINR.Because this close-loop power controlling method carrys out adjustment aim SINR according to the parameter of adding up in a period of time, the interference strength of minizone between therefore set target SINR can not embody and work as, thus effectively can not reduce the interference of minizone.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of close-loop power controlling method, and the method effectively can reduce the interference of minizone.
In order to achieve the above object, the technical scheme that the present invention proposes is:
A kind of close-loop power controlling method, comprising:
When base station needs to carry out close-loop power control to user equipment (UE), according to the current interference strength to adjacent area of this UE, according to the setting principle preset, determine the interference regulation coefficient t of this UE; Described setting principle is: described t is that UE is to the non-increasing of the interference strength of adjacent area or nondecreasing function;
Described base station is according to SINR
target=SINR
init+ h (t), determines the target Signal to Interference plus Noise Ratio SINR of described UE
target, wherein, described SINR
initfor the Signal to Interference plus Noise Ratio initial value preset, when described setting principle is: when described t is the nondecreasing function of UE to the interference strength of adjacent area, described h (t) is for independent variable and for the subtraction function of described t with described t, when described setting principle is: when described t is the nonincreasing function of UE to the interference strength of adjacent area, described h (t) is for independent variable and for the increasing function of described t with described t;
Described base station, according to described target Signal to Interference plus Noise Ratio, adjusts the uplink transmission power of described UE, and notifies described UE.
In sum, the close-loop power controlling method that the present invention proposes, when carrying out close-loop power control according to the current interference strength to adjacent area of user, being user's Offered target Signal to Interference plus Noise Ratio, therefore, effectively can reducing the interference of minizone.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the embodiment of the present invention one.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
Core concept of the present invention is: when carrying out close-loop power control, according to the current interference strength to adjacent area of user, is user's Offered target Signal to Interference plus Noise Ratio adjustment user transmitted power, effectively reduces the interference of minizone.
Fig. 1 is the schematic flow sheet of the embodiment of the present invention one, and as shown in Figure 1, this embodiment mainly comprises:
Step 101, when base station needs to carry out close-loop power control to user equipment (UE), according to the current interference strength to adjacent area of this UE, according to preset setting principle, determine the interference regulation coefficient t of this UE.
Preferably, described setting principle is specifically as follows: interference regulation coefficient t is that UE is to the non-increasing of the interference strength of adjacent area or nondecreasing function, so, the size of described interference regulation coefficient t can reflect the interference strength of UE to adjacent area, after this to carry out the setting of target Signal to Interference plus Noise Ratio according to described t, to be obtained the effect reducing presence of intercell interference by Offered target Signal to Interference plus Noise Ratio.
Preferably, when described setting principle is: when described t is the nondecreasing function of UE to the interference strength of adjacent area, described t can directly be set to for recording the disturbance state parameter S of UE to the interference strength of adjacent area
current.
Preferably, when described setting principle is: when described t is the nonincreasing function of UE to the interference strength of adjacent area, described t can be set to the operable band resource size B of described UE
current.Such as, t=B
current, h (B
current)=10log
10(B
current)-k
0(k
0be a constant) time, if will the band resource B distributed be represented
currentless, target sinr values reduces relatively.Here it should be noted that, according to existing system, the operable band resource size B of UE
currentdetermined according to described interference strength by system, this B
currentwith the interference strength Cheng Feizeng relation of UE to adjacent area, namely the interference strength of UE to adjacent area is less, and the band resource distributed for UE is comparatively large, B
currentcomparatively large, on the contrary UE is comparatively large to the interference strength of adjacent area, and the band resource distributed for UE is less, B
currentless.
Step 102, described base station are according to SINR
target=SINR
init+ h (t), determines the target Signal to Interference plus Noise Ratio SINR of described UE
target.
Wherein, described SINR
initfor the Signal to Interference plus Noise Ratio initial value preset.
When described setting principle is: when described t is the nondecreasing function of UE to the interference strength of adjacent area, described h (t) is for independent variable and for the subtraction function of described t with described t, when described setting principle is: when described t is the nonincreasing function of UE to the interference strength of adjacent area, described h (t) is for independent variable and for the increasing function of described t with described t.
In this step, at Offered target Signal to Interference plus Noise Ratio SINR
targettime, introduce function h (t) about t, thus the interference strength of UE to adjacent area can be taken into full account when Offered target Signal to Interference plus Noise Ratio.
Here, when described setting principle is: when described t is the nondecreasing function of UE to the interference strength of adjacent area, described h (t) with described t for independent variable and be the subtraction function of described t, when described setting principle is: when described t is the nonincreasing function of UE to the interference strength of adjacent area, described h (t) with described t for independent variable and be the increasing function of described t, as piecewise function or logarithmic function etc.So, h (t) can be made relevant to the interference strength of UE to adjacent area, when the interference strength height of UE to adjacent area, its target Signal to Interference plus Noise Ratio will be lower, like this, also will be lower according to the transmitted power that target Signal to Interference plus Noise Ratio adjusts, thus the object reducing presence of intercell interference can be reached.
Further, in order to take into full account the mobility of UE, make to carry out on certain radix the adjustment of UE target Signal to Interference plus Noise Ratio, to guarantee that the target Signal to Interference plus Noise Ratio of UE can not be die-offed because of the mobility of UE or suddenly increase, those skilled in the art can according to the path loss between UE and base station, according to path loss and SINR
initbecome the relation of subtraction function that described SINR is set
initif namely UE is large to the path loss of base station, then SINR
initvalue can arrange less, if little to the path loss of base station, then SINR
initvalue can arrange large.
Particularly, Reference Signal Received Power (the Reference Signal Received Power that can report according to UE, RSRP) or power headroom (PHR) carry out the path loss size determining UE and base station, such as, if the transmitted power being obtained single RB by power headroom is little, then path loss is little, SINR
initvalue can arrange large, if it is large to obtain the transmitted power of single RB by power headroom, then path loss is greatly, then SINR
initvalue can arrange less, same, if RSRP is little, then path loss is large, SINR
initvalue can arrange less, if RSRP is large, then path loss is little, then SINR
initvalue can arrange large.
Step 103, described base station, according to described target Signal to Interference plus Noise Ratio, adjust the uplink transmission power of described UE, and notify described UE.
The same existing system of concrete methods of realizing of this step, when target Signal to Interference plus Noise Ratio is lower, transmitted power adjusted accordingly also will be lower, and concrete grammar does not repeat them here.
In sum, these are only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. a close-loop power controlling method, is characterized in that, comprising:
When base station needs to carry out close-loop power control to user equipment (UE), according to the current interference strength to adjacent area of this UE, according to the setting principle preset, determine the interference regulation coefficient t of this UE; Described setting principle is: described t is that UE is to the non-increasing of the interference strength of adjacent area or nondecreasing function;
Described base station is according to SINR
target=SINR
init+ h (t), determines the target Signal to Interference plus Noise Ratio SINR of described UE
target, wherein, described SINR
initfor the Signal to Interference plus Noise Ratio initial value preset, when described setting principle is: when described t is the nondecreasing function of UE to the interference strength of adjacent area, described h (t) is for independent variable and for the subtraction function of described t with described t, when described setting principle is: when described t is the nonincreasing function of UE to the interference strength of adjacent area, described h (t) is for independent variable and for the increasing function of described t with described t;
Described base station, according to described target Signal to Interference plus Noise Ratio, adjusts the uplink transmission power of described UE, and notifies described UE.
2. close-loop power controlling method according to claim 1, is characterized in that, when described setting principle is: when described t is the nondecreasing function of UE to the interference strength of adjacent area, described t is the disturbance state parameter S of described UE
current.
3. close-loop power controlling method according to claim 1, it is characterized in that, when described setting principle is: when described t is the nonincreasing function of UE to the interference strength of adjacent area, described t is the operable band resource size B of described UE that system is determined according to described interference strength
current.
4. close-loop power controlling method according to claim 1, is characterized in that, described method comprises further:
According to the path loss between described UE and base station, according to path loss and SINR
initbecome the relation of subtraction function that described SINR is set
init.
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| CN201310216498.0A CN104219750B (en) | 2013-06-03 | 2013-06-03 | A kind of close-loop power controlling method |
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|---|---|---|---|
| CN201310216498.0A CN104219750B (en) | 2013-06-03 | 2013-06-03 | A kind of close-loop power controlling method |
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| Publication Number | Publication Date |
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| CN104219750A true CN104219750A (en) | 2014-12-17 |
| CN104219750B CN104219750B (en) | 2018-03-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107347206A (en) * | 2016-05-04 | 2017-11-14 | 普天信息技术有限公司 | A kind of Poewr control method |
| CN110035487A (en) * | 2019-04-17 | 2019-07-19 | 北京智芯微电子科技有限公司 | Layering Poewr control method in electric power wireless communication system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1697342A (en) * | 2004-05-11 | 2005-11-16 | 皇家飞利浦电子股份有限公司 | Power control method and appts. for CDMA radio Communication network |
| US20080166976A1 (en) * | 2007-01-09 | 2008-07-10 | Rao Anil M | Reverse link power control |
| CN101986752A (en) * | 2010-11-04 | 2011-03-16 | 杭州市电信规划设计院有限公司 | Control method of uplink power of long term evolution (LTE) system |
-
2013
- 2013-06-03 CN CN201310216498.0A patent/CN104219750B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1697342A (en) * | 2004-05-11 | 2005-11-16 | 皇家飞利浦电子股份有限公司 | Power control method and appts. for CDMA radio Communication network |
| US20080166976A1 (en) * | 2007-01-09 | 2008-07-10 | Rao Anil M | Reverse link power control |
| CN101986752A (en) * | 2010-11-04 | 2011-03-16 | 杭州市电信规划设计院有限公司 | Control method of uplink power of long term evolution (LTE) system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107347206A (en) * | 2016-05-04 | 2017-11-14 | 普天信息技术有限公司 | A kind of Poewr control method |
| CN107347206B (en) * | 2016-05-04 | 2019-12-20 | 普天信息技术有限公司 | Power control method |
| CN110035487A (en) * | 2019-04-17 | 2019-07-19 | 北京智芯微电子科技有限公司 | Layering Poewr control method in electric power wireless communication system |
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| Publication number | Publication date |
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| CN104219750B (en) | 2018-03-23 |
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