CN102811469A - Power control method and device - Google Patents
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- CN102811469A CN102811469A CN2012102595898A CN201210259589A CN102811469A CN 102811469 A CN102811469 A CN 102811469A CN 2012102595898 A CN2012102595898 A CN 2012102595898A CN 201210259589 A CN201210259589 A CN 201210259589A CN 102811469 A CN102811469 A CN 102811469A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/143—Downlink power control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/246—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters where the output power of a terminal is based on a path parameter calculated in said terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/40—TPC being performed in particular situations during macro-diversity or soft handoff
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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Abstract
The invention provides a power control method and a power control device. The method comprises the following steps that: a relay node periodically measures link information of a backhaul link and periodically estimates link information of an access link; the relay node calculates power to be adjusted according to current cell reference signal power, cell transmitting power, the measured link information of the backhaul link and the estimated link information of the access link; and when an absolute value of a difference value between the power to be adjusted and current power reaches a preset power adjusting threshold, the power is adjusted by the relay node.
Description
Technical field
The present invention relates to Long Term Evolution (LTE, Long Term Evolution) communication system, particularly a kind of Poewr control method and device.
Background technology
The LTE network architecture behind the introducing relaying technique is as shown in Figure 1.Via node (RN, Relay Node) is the Un interface with contributing the interface between the base station (DeNB, Donor eNodeB), is called back haul link (Backhaul Link); Interface between R-UE (belonging to the UE of RN) and the RN is the Uu interface, is called access link (Access Link); Interface between subscriber equipment (UE, User Equipment) and the DeNB is the Uu interface, is called the link that direct transfers (Direct Link).RN is the function that between UE and DeNB, plays transfer, supports the most function of eNB, also supports the most function of UE.DeNB (comprises other eNB, between Mobility Management Entity (MME, Mobility Management Entity) and the gateway (S-GW, Service-Gateway)) S1 and X2 agent functionality is provided with other network nodes at RN.
After introducing relaying technique, increased by one section wireless backhaul link.But UE can only obtain access link information or direct link information during cell selecting/district reselecting, is used for the auxiliary ambulant UE measurement report of connected state and also can only gets access to access link information or direct link information.The sub-district that like this, just might cause selecting is not optimum.Very good to the RN access link such as UE, RN is relatively poor to the back haul link of DeNB, and UE is medium to the link that direct transfers of DeNB, and like this, the service quality that UE is linked into the RN acquisition directly inserts DeNB not as good as UE.
Summary of the invention
Technical problem to be solved by this invention is, a kind of Poewr control method and device are provided, and under the situation that can't obtain back haul link information, realizes cell selecting/district reselecting to solve UE, and the mobility Target cell is selected optimization.
In order to solve the problems of the technologies described above, the invention discloses
A kind of Poewr control method, this method comprises:
The link information that via node is periodically measured the link information of back haul link and periodically estimated access link;
Via node calculates power to be adjusted according to the link information of the access link of the link information of the back haul link of current cell reference signals power, cell transmit power, measurement and estimation;
When the absolute value of the difference between power to be adjusted and the current power reached the power adjustment thresholding that presets, via node carried out the power adjustment.
Preferably, said method also has following characteristics: the process of link information that said via node is periodically measured back haul link is following:
Said via node is according to cycle T
MeasPeriodically measure back haul link, to obtain the link information of back haul link, wherein, said back haul link and link information comprise Reference Signal Received Power at least or/and Reference Signal Received Quality.
Preferably, said method also has following characteristics: said via node estimates that periodically the link information of access link refers to:
Said via node is according to cycle T
EstimatePeriodically estimate the link information of access link.
Preferably, said method also has following characteristics: said via node carries out the power adjustment and refers to:
Said via node sends to said background net management and upgrades power message, and said background net management upgrades the power show value through after confirming, and the performance number after will upgrading is synchronized to the foreground triggering and comes into force, and comprises that this locality comes into force and upgrade broadcasting; Perhaps,
Said via node sends renewal power information updating background net management power show value to said background net management when the foreground triggering comes into force.
Said background net management adopts automated manner or/and manual type is confirmed after receiving and upgrading power message.
Preferably, said method also has following characteristics:
It is that cell reference signals power and/or cell transmit power are adjusted that said via node carries out the power adjustment.
A kind of output control device, this device comprises:
First module, the link information of periodically measuring the link information of back haul link and periodically estimating access link;
Second module is calculated power to be adjusted according to the link information of the access link of the link information of the back haul link of current cell reference signals power, cell transmit power, measurement and estimation;
Three module when the absolute value of the difference between power to be adjusted that said second module is calculated and current power reaches the power adjustment thresholding of prior setting, carries out power adjustment.
Preferably, said device also has following characteristics: the process of link information that said first module is periodically measured back haul link is following:
Said first module is according to cycle T
MeasPeriodically measure back haul link, to obtain the link information of back haul link, wherein, said back haul link and link information comprise Reference Signal Received Power at least or/and Reference Signal Received Quality.
Preferably, said device also has following characteristics: said first module estimates that periodically the link information of access link refers to:
Said first module is according to cycle T
EstimatePeriodically estimate the link information of access link.
Preferably, said device also has following characteristics: said three module carries out the power adjustment and refers to:
Said three module sends to said background net management and upgrades power message, after confirming through said background net management, upgrades the power show value, and the performance number after will upgrading is synchronized to the foreground triggering and comes into force, and comprises that this locality comes into force and upgrade broadcasting; Perhaps,
Said three module sends renewal power information updating background net management power show value to background net management when coming into force and upgrade broadcasting in triggering this locality.
Said background net management adopts automated manner or/and manual type is confirmed after receiving and upgrading power message.
Preferably, said device also has following characteristics:
It is that cell reference signals power and/or cell transmit power are adjusted that said via node carries out the power adjustment.
The present techniques scheme is according to the power of the change dynamics adjustment RN of back haul link; Make access link and back haul link keep coupling; Thereby do not knowing to realize still under the link information situation of back haul link that the mobility switching cell selection under cell selecting/district reselecting and the connected state is optimum, thereby improving usage factor of system resource and user experience.
Description of drawings
Fig. 1 is the power control flow sketch map that present embodiment provides;
Fig. 2 is the adjustment power calculation handling process sketch map that present embodiment provides;
Fig. 3 is the power adjustment judgement schematic flow sheet that present embodiment provides;
Fig. 4 is that a kind of power that present embodiment provides upgrades schematic flow sheet;
Fig. 5 is that the another kind of power that present embodiment provides upgrades schematic flow sheet;
Fig. 6 is that the link information of the access link that provides of present embodiment is estimated the handling process sketch map.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, hereinafter will combine accompanying drawing that technical scheme of the present invention is done further explain.Need to prove, under the situation of not conflicting, the combination each other arbitrarily of the application's embodiment and the characteristic among the embodiment.
Embodiment 1
After the applicant finds to introduce via node, increased by one section wireless back haul link.Can't obtain back haul link information to cause cell selecting/district reselecting possibly not be optimum but UE can only measure access link.UE can only report RN or eNodeB or DeNB with metrical information access link or that direct transfer link, and causing the mobility selection switching target small area under the connected state possibly not be optimum.Thereby influence user experience and usage factor of system resource.
To the problems referred to above, the applicant proposes a kind of Poewr control method, to guarantee to select optimum sub-district.This method comprises following operation:
The link information that via node (RN) is periodically measured the link information of back haul link and periodically estimated access link;
Via node is according to calculating such as the link information power to be adjusted of the access link of the link information of the back haul link of current cell reference signals power, cell transmit power, measurement and estimation;
When the absolute value of the difference between power to be adjusted and the current power reached the power adjustment thresholding that presets, via node carried out the power adjustment.
Wherein, for the measurement of back haul link.RN is with cycle T
Meas(configurable) periodic measurement back haul link; To obtain the link information of back haul link; Comprise Reference Signal Received Power (RSRP, Reference Signal Receiving Power) or/and Reference Signal Received Quality (RSRQ, Reference Signal Receiving Quality) etc.
Estimation for access link.RN is then with cycle T
EstimateEstimate the link information of access link.
Be noted that before aforesaid operations RN obtains relevant configuration parameter from background net management, comprise reference signal power E_RS, cell transmit power, power adjustment cycle T
PowerAlign, power adjustment thresholding Threshold
PowerAlign, measurement period T
MeasWith cycle estimator T
EstimateDeng.Wherein, power adjustment cycle T
PowerAlign, measurement period T
MeasWith cycle estimator T
EstimateCan also be configured to an equal values or a shared parameter cycle T.
When the RN judgement need be carried out the power adjustment, RN sent to background net management and upgrades power message, was synchronized to the foreground by background net management then and triggered come into force (upgrading and other mode etc. that comes into force through broadcasting).Perhaps, RN sends renewal power message to background net management when triggering comes into force.
Above-mentioned via node carries out the power adjustment and refers to that via node is adjusted cell reference signals power and/or cell transmit power.
Detailed process below in conjunction with the realization of description of drawings said method.
A kind of detailed process of power control is as shown in Figure 1, comprises the steps 101 operations to step 108.
Step 101:RN obtains relevant configuration parameter from the background net management configuration module, comprises cell reference signals power E_RS, cell transmit power, power adjustment cycle T
PowerAlign, power adjustment thresholding Threshold
PowerAlign, measurement period T
MeasWith cycle estimator T
EstimateDeng;
Step 102:RN (the base station functions entity of RN) start-up period is T
PowerAlignCycle timer;
Step 103:RN (the base station functions entity of RN) is with cycle T
MeasPeriodically estimate the link information of access link;
Step 104:RN (the UE functional entity of RN) is with cycle T
MeasPeriodically measure the link information of back haul link, and notify the base station functions entity of RN the link information that measures;
The average link metrical information of the back haul link in step 105:RN (the base station functions entity of RN) the statistics power adjustment cycle and the average link estimated information of access link.
Step 106: when the power adjustment cycle reaches, calculate new power to be adjusted according to the link information of current power, access link and the link information of back haul link;
Step 107: new power that will be to be adjusted is sent into power adjustment judging module.If output action is designated as the power adjustment, then go to step 108; Otherwise, return;
Step 108:RN (the base station functions entity of RN) carries out power to be upgraded.
Wherein, the detailed process that power calculation is handled is as shown in Figure 2, comprises the operation of step 201 to step 205.
Step 201:RN (the base station functions entity of RN) converts the measured value of back haul link into linear value;
Step 202:RN (the base station functions entity of RN) converts the estimated value of access link into linear value;
Step 203:RN (the base station functions entity of RN) is a linear value with current power transfer;
Step 204: estimate power to be adjusted by linear scale.
Wherein, the estimated value of power=(measured value of current Power x back haul link)/access link to be adjusted;
Step 205 step: with estimating that the power transfer to be adjusted that obtains is a logarithm value.
Power adjustment decision process process is as shown in Figure 3, comprises the operation of step 301 to 304.
Step 301:RN (the base station functions entity of RN) obtains power adjustment thresholding, goes to step 302;
Step 302:RN (the base station functions entity of RN) obtains current power, goes to step 303;
Step 303:RN (the base station functions entity of RN) obtains the power to be adjusted that calculates, and goes to step 304;
Step 304: power adjustment judgement.
In this step,, then power to be adjusted is changed to minimum value if wait to adjust power less than the minimum value that system allows.If wait to adjust power greater than the maximum that system allows, then power to be adjusted be changed to maximum.Or/and the absolute value of the cell transmit power of current power and the cell transmit power difference of waiting to adjust power during more than or equal to power adjustment thresholding, then output action is designated as the power adjustment to the absolute value of the reference signal power of current power and the reference signal power difference of waiting to adjust power more than or equal to power adjustment thresholding; Otherwise output action is designated as and does not adjust.
A kind of implementation method that power upgrades is as shown in Figure 4, comprises the operation of step 401 to 404.。
Step 401:RN (the base station functions entity of RN) judgement is carried out local update and is come into force after needing to carry out the power adjustment;
Step 402:RN (the base station functions entity of RN) broadcasts renewal, the power after upgrading so that the UE under the RN can receive and come into force;
Step 403:RN (the base station functions entity of RN) upgrades request to the background net management transmitted power;
Step 404: after background net management was received and upgraded power request message, preservation was also upgraded power show value etc.
The another kind of implementation method that power upgrades is as shown in Figure 5, comprises the operation of step 501 to 503.
Step 501:RN (the base station functions entity of RN) judgement is upgraded request to the background net management transmitted power after needing to carry out the power adjustment;
Step 502: after background net management received that power upgrades request, through confirming after (comprising automated manner or/and manual type) that preservation is also upgraded power show value etc., the performance number after will upgrading then was synchronized to the foreground;
Update processing is triggered on step 503:RN (the base station functions entity of RN) foreground.RN (the base station functions entity of RN) reads value after the renewal from database and is saved in this locality and comes into force, and initiates broadcasting then and upgrades.
The link information of access link estimates that processing procedure is as shown in Figure 6, comprises the operation of step 601 to 603.
Step 601:RN (the base station functions entity of RN) start-up period timer T
Estimate
Step 602:RN (the base station functions entity of RN) preserves the current link information that reports of each UE;
Step 603: the cycle, the link information that RN (the base station functions entity of RN) reports according to each UE that preserves was estimated the average link information of access link when reaching.
Embodiment 2
Present embodiment is introduced a kind of output control device, can be RN, but also is not limited to RN, and it comprises first module, second module and three module at least.
First module, the link information of periodically measuring the link information of back haul link and periodically estimating access link;
Second module is calculated power to be adjusted according to the link information of the access link of the link information of the back haul link of current cell reference signals power, cell transmit power, measurement and estimation;
Three module when the absolute value of the difference between power to be adjusted that second module is calculated and current power reaches the power adjustment thresholding of prior setting, carries out power adjustment.
Particularly, first module can be according to cycle T
MeasPeriodically measure back haul link, to obtain the link information of back haul link, wherein, measured back haul link and link information comprise Reference Signal Received Power at least or/and Reference Signal Received Quality.
In addition, first module is also according to cycle T
EstimatePeriodically estimate the link information of access link.
When being noted that the first module periodic measurement back haul link and periodically estimating access link, the measurement period T that is adopted
MeasAnd cycle estimator T
EstimateCan obtain from background net management.
The detailed process that three module carries out power adjustment is, three module sends to background net management and upgrades power message, is synchronized to the foreground by background net management and triggers and come into force, and comprises coming into force and upgrades in this locality to broadcast etc.; Perhaps, three module sends renewal power message to background net management when the foreground triggering comes into force.
Other has some to realize that details can repeat no more at this referring to the foregoing description 1.
One of ordinary skill in the art will appreciate that all or part of step in the said method can instruct related hardware to accomplish through program, said program can be stored in the computer-readable recording medium, like read-only memory, disk or CD etc.Alternatively, all or part of step of the foregoing description also can use one or more integrated circuits to realize.Correspondingly, each the module/unit in the foregoing description can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The application is not restricted to the combination of the hardware and software of any particular form.
Can find out from the foregoing description; The present techniques scheme is to introducing power (comprising cell reference signals power or/and cell transmit power etc.) adjustment problem behind the via node; RN dynamically adjusts RN according to the link information of back haul link power is proposed; Thereby keep access link and back haul link coupling, thereby in the Node B (eNodeB, Evolved NodeB) of UE or RN or evolution or contribute base station (DeNB; Donor eNodeB) link information that only obtains access link (comprises Reference Signal Received Power (RSRP; Reference Signal Receiving Power) or/and Reference Signal Received Quality (RSRQ, Reference Signal Receiving Quality) etc.) situation under still can select optimum sub-district, improved resource utilization ratio and user experience.
The above is merely preferred embodiments of the present invention, is not to be used to limit protection scope of the present invention.All within spirit of the present invention and principle, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a Poewr control method is characterized in that, this method comprises:
The link information that via node is periodically measured the link information of back haul link and periodically estimated access link;
Via node calculates power to be adjusted according to the link information of the access link of the link information of the back haul link of current cell reference signals power, cell transmit power, measurement and estimation;
When the absolute value of the difference between power to be adjusted and the current power reached the power adjustment thresholding that presets, via node carried out the power adjustment.
2. the method for claim 1 is characterized in that, the process of link information that said via node is periodically measured back haul link is following:
Said via node is according to cycle T
MeasPeriodically measure back haul link, to obtain the link information of back haul link, wherein, said back haul link and link information comprise Reference Signal Received Power at least or/and Reference Signal Received Quality.
3. the method for claim 1 is characterized in that, said via node estimates that periodically the link information of access link refers to:
Said via node is according to cycle T
EstimatePeriodically estimate the link information of access link.
4. like each described method of claim 1 to 3, it is characterized in that said via node carries out the power adjustment and refers to:
Said via node sends to said background net management and upgrades power message, and said background net management upgrades the power show value through after confirming, and the performance number after will upgrading is synchronized to the foreground triggering and comes into force, and comprises that this locality comes into force and upgrade broadcasting; Perhaps,
Said via node sends renewal power information updating background net management power show value to said background net management when the foreground triggering comes into force, said background net management adopts automated manner or/and the manual type affirmation after receiving and upgrading power message.
5. method as claimed in claim 4 is characterized in that,
It is that cell reference signals power and/or cell transmit power are adjusted that said via node carries out the power adjustment.
6. an output control device is characterized in that, this device comprises:
First module, the link information of periodically measuring the link information of back haul link and periodically estimating access link;
Second module is calculated power to be adjusted according to the link information of the access link of the link information of the back haul link of current cell reference signals power, cell transmit power, measurement and estimation;
Three module when the absolute value of the difference between power to be adjusted that said second module is calculated and current power reaches the power adjustment thresholding of prior setting, carries out power adjustment.
7. device as claimed in claim 6 is characterized in that, the process of link information that said first module is periodically measured back haul link is following:
Said first module is according to cycle T
MeasPeriodically measure back haul link, to obtain the link information of back haul link, wherein, said back haul link and link information comprise Reference Signal Received Power at least or/and Reference Signal Received Quality.
8. device as claimed in claim 6 is characterized in that, said first module estimates that periodically the link information of access link refers to:
Said first module is according to cycle T
EstimatePeriodically estimate the link information of access link.
9. like each described device of claim 6 to 8, it is characterized in that said three module carries out the power adjustment and refers to:
Said three module sends to said background net management and upgrades power message, after confirming through said background net management, upgrades the power show value, and the performance number after will upgrading is synchronized to the foreground triggering and comes into force, and comprises that this locality comes into force and upgrade broadcasting; Perhaps,
Said three module trigger local come into force and upgrades broadcasting in send to background net management and to upgrade power information updating background net management power show value, said background net management adopts automated manner or/and the manual type affirmation after receiving and upgrading power message.
10. device as claimed in claim 9 is characterized in that,
It is that cell reference signals power and/or cell transmit power are adjusted that said via node carries out the power adjustment.
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| CN201210259589.8A CN102811469B (en) | 2012-07-25 | 2012-07-25 | A kind of Poewr control method and device |
| PCT/CN2013/080079 WO2013185690A1 (en) | 2012-07-25 | 2013-07-25 | Power control method and device |
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| CN201210259589.8A CN102811469B (en) | 2012-07-25 | 2012-07-25 | A kind of Poewr control method and device |
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| WO2013185690A1 (en) * | 2012-07-25 | 2013-12-19 | 中兴通讯股份有限公司 | Power control method and device |
| CN109388488A (en) * | 2017-08-02 | 2019-02-26 | 联想企业解决方案(新加坡)有限公司 | Power allocation in computer system |
| CN110381571A (en) * | 2019-05-27 | 2019-10-25 | 北京拓明科技有限公司 | A kind of the power dynamic adjusting method and system of LTE base station |
| CN110662240A (en) * | 2018-06-29 | 2020-01-07 | 中国移动通信有限公司研究院 | Indication method, receiving method, network equipment and access equipment of transmitting power |
| WO2020025065A1 (en) * | 2018-08-03 | 2020-02-06 | 中兴通讯股份有限公司 | Power determination and signal transmission methods, apparatus, network device and storage medium |
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| US20120051256A1 (en) * | 2009-05-15 | 2012-03-01 | Panasonic Corporation | Wireless communication terminal and wireless communication method |
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| WO2013185690A1 (en) * | 2012-07-25 | 2013-12-19 | 中兴通讯股份有限公司 | Power control method and device |
| US10873888B2 (en) * | 2016-07-04 | 2020-12-22 | Lg Electronics Inc. | Method for configuring synchronization for mobile relay node in next generation wireless communication system and device for same |
| CN109388488A (en) * | 2017-08-02 | 2019-02-26 | 联想企业解决方案(新加坡)有限公司 | Power allocation in computer system |
| CN109388488B (en) * | 2017-08-02 | 2022-11-25 | 联想企业解决方案(新加坡)有限公司 | Power allocation in computer system |
| CN110662240A (en) * | 2018-06-29 | 2020-01-07 | 中国移动通信有限公司研究院 | Indication method, receiving method, network equipment and access equipment of transmitting power |
| US11523352B2 (en) | 2018-06-29 | 2022-12-06 | China Mobile Communication Co., Ltd Research Institute | Transmit power indication method, transmit power receiving method, network device and access device |
| WO2020025065A1 (en) * | 2018-08-03 | 2020-02-06 | 中兴通讯股份有限公司 | Power determination and signal transmission methods, apparatus, network device and storage medium |
| CN110381571A (en) * | 2019-05-27 | 2019-10-25 | 北京拓明科技有限公司 | A kind of the power dynamic adjusting method and system of LTE base station |
| CN110381571B (en) * | 2019-05-27 | 2022-08-16 | 北京拓明科技有限公司 | Dynamic power adjustment method and system for LTE base station |
| WO2024021981A1 (en) * | 2022-07-29 | 2024-02-01 | 华为技术有限公司 | Communication method and apparatus |
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| WO2013185690A1 (en) | 2013-12-19 |
| CN102811469B (en) | 2018-08-07 |
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