CN105591714A - Channel quality indicator (CQI) adjusting method and apparatus, and low-power base station - Google Patents
Channel quality indicator (CQI) adjusting method and apparatus, and low-power base station Download PDFInfo
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- CN105591714A CN105591714A CN201410614403.5A CN201410614403A CN105591714A CN 105591714 A CN105591714 A CN 105591714A CN 201410614403 A CN201410614403 A CN 201410614403A CN 105591714 A CN105591714 A CN 105591714A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention provides a channel quality indicator (CQI) adjusting method and apparatus, and a low-power base station. The method comprises receiving a CQI reported by user equipment (UE) and adjusting the reported CQI according to a preset rule. According to the invention, the problem of an increased air interface error rate caused by an overlarge CQI measured and estimated by UE in the related arts is solved, and accordingly, the effect of preventing the air interface error rate from being increased due to the overlarge CQI is realized.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of channel quality indicator (CQI) method of adjustment,Device and low power base station.
Background technology
Actual UMTS (UniversalMobileTelecommunicationsSystem,Referred to as UMTS) during heterogeneous network Hetnet disposes, can there is user's up-downgoing service link imbalance,Thereby it is limited to cause some cell uplink to cover, reducing uplink macro diversity gain does not even have uplink macro diversity gain,Even cause the very low or handoff failure of conversation loss, up-downgoing data service flow, also can disturb up-downgoingLink balance region user's business experience.
Especially mobile broadband service development is in recent years swift and violent, various 3GPP standard intelligent terminal (mobile phone, dataCard, iPad etc.) data service blowout formula application directly cause hot zones data traffic and various based on movingThe APP application of moving the Internet, applications presents explosive growth trend, only strengthens traditional macrocell performance veryDifficulty is dealt with problems completely, and mobile communications industry is reached highly common recognition, adopts in macrocell and disposes with low merit frequentlyBurgeoning data traffic and various based on movement is solved in rate base station (for example Micro, Pico base station)The APP application demand of the Internet, applications, these low power base station are deployed in and in macrocell, realize focusSupplement and cover, form the Hetnet heterogeneous network that macrocell and low power cell coexist, the 3GPP research of also setting up the projectUMTSHetnet, emphasis solves the unbalanced problem of uplink downlink, and with reference to figure 1, Fig. 1 is correlation techniqueIn the uneven schematic diagram of uplink downlink of UMTSHetnet network.
The user performance decline problem of bringing in order to solve up-downgoing service link imbalance, has a kind of solutionTo strengthen low power cell pilot technique, make low power cell primary common pilot descending boundary and original underBetween row traffic border, realize space separation, realized poor between the pilot tone of low power cell and downlink businessAlienation overlay strategy, low power cell pilot tone, broadcast, the large covering of synchronizing channel, low power cell downlink businessCover little covering (high speed-Physical Downlink Shared Channel (HighSpeedPhysical of for example low power cellDownlinkSharedChannel, referred to as HS-PDSCH) data channel available horsepower do not increase, stillTaking traditional pilot power or virtual pilot frequency power as with reference to), low power base station community strengthens primary common pilotChannel/Primary Common Control Physical Channel/Supplemental Channel (PrincipalCommonPilotChannel/PrimaryCommonControlPhysicalChannel/SupplementalChannel, referred to asP-CPICH/P-CCPCH/SCH) after Supplemental Channel power, make border, uneven district trigger soft handover, make lowPilot channel, broadcast channel and the synchronizing channel border of power base station community and the signal of downlink business boundary separationFigure can be with reference to figure 2, Fig. 2 be the low power base station community in correlation technique pilot channel, broadcast channel withAnd synchronizing channel border and downlink business boundary separation schematic diagram, solving the grand micro-uneven district user of tradition cannot becomeMerit completes the problem of soft switching process and wave point synchronizing process. Thereby make up-downgoing service link imbalanceDistrict user can obtain uplink macro diversity gain, avoids the uneven district user of up-downgoing service link little to low-powerDistrict brings uplink interference, becomes dry and disturbs as useful signal, promotes user's business experience, promotes Hetnet networkPerformance.
But, because the P-CPICH pilot tone coverage of low power cell is greater than the covering model of HS-PDSCHEnclose, mobile phone can be according to the P-CPICH pilot power estimated channel quality instruction (ChannelQuality measuringInformation, referred to as CQI), obviously because strengthening, the pilot power of P-CPICH causes subscriber equipment (UserEquipment, referred to as UE) measure estimate CQI bigger than normal, can mislead like this low power base station and launch moreLarge transmission block (TransportBlock, referred to as TB) data and employing high-order modulating are transmitted to UE,Cause eating dishes without rice or wine bit error rate change greatly, affect service feature and user's experience.
Measure for the UE existing in correlation technique the CQI estimating bigger than normal, the bit error rate that causes eating dishes without rice or wine becomes large askingTopic, not yet proposes effective solution at present.
Summary of the invention
The invention provides a kind of channel quality indicator (CQI) method of adjustment and device, at least to solve relevant skillIt is bigger than normal that the UE existing in art measures the CQI estimating, the bit error rate that causes eating dishes without rice or wine becomes large problem.
According to an aspect of the present invention, provide a kind of channel quality indicator (CQI) method of adjustment, having comprised:Receive the CQI of reported by user equipment UE; According to pre-defined rule, the described CQI reporting is adjusted.
Further, according to pre-defined rule, the described CQI reporting is adjusted and comprised: according to following formulaThe described CQI reporting is adjusted: CQIadjusted＝CQI-W1, wherein, described W1For being greater than0 integer, described W1Determine according to the described CQI reporting.
Further, according to pre-defined rule, the described CQI reporting is adjusted and comprised: according to following formulaThe described CQI reporting is adjusted: CQIadjusted＝W2× CQI, wherein, described W2For being greater than0 and be less than 1 decimal, described W2Determine according to the described CQI reporting.
Further, after the described CQI reporting being adjusted according to pre-defined rule, also comprise: rootDetermine the letter of high speed-Physical Downlink Shared Channel HS-PDSCH according to the described CQI of CQI mapping table and adjustmentBreath, wherein, the information of described HS-PDSCH comprise following one of at least: the transmission of described HS-PDSCHThe modulation system of the size of piece TB, described HS-PDSCH code channel number, described HS-PDSCH, described inThe reference power of HS-PDSCH is adjusted parameter.
According to a further aspect in the invention, provide a kind of channel quality indicator (CQI) adjusting device, having comprised:Receiver module, for receiving the CQI of reported by user equipment UE; Adjusting module, for according to pre-defined rule pairThe described CQI reporting adjusts.
Further, described adjusting module comprises: according to following formula, the described CQI reporting is adjusted:CQIadjusted＝CQI-W1, wherein, described W1For being greater than 0 integer, described W1According to what reportDescribed CQI determines.
Further, described adjusting module comprises: according to following formula, the described CQI reporting is adjusted:CQIadjusted＝W2× CQI, wherein, described W2For being greater than 0 and be less than 1 decimal, described W2RootDetermine according to the described CQI reporting.
Further, this channel quality indicator (CQI) adjusting device also comprises: determination module, and for according to CQIThe described CQI of mapping table and adjustment determines the information of high speed-Physical Downlink Shared Channel HS-PDSCH, wherein,The information of described HS-PDSCH comprise following one of at least: the transmission block TB's of described HS-PDSCH is largeLittle, described HS-PDSCH code channel number, the modulation system of described HS-PDSCH, described HS-PDSCH'sReference power is adjusted parameter.
According to a further aspect in the invention, provide a kind of low power base station, comprised the dress described in above-mentioned any onePut.
By the present invention, adopt the CQI that receives reported by user equipment UE; According to pre-defined rule to the institute reportingState CQI and adjust, the CQI that has solved the UE measurement estimation existing in correlation technique is bigger than normal, causes skySlip of the tongue code check becomes large problem, and then has reached and avoid causing because CQI is bigger than normal the bit error rate of eating dishes without rice or wine to become largeEffect.
Brief description of the drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part,Schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the uneven schematic diagram of the uplink downlink of the UMTSHetnet network in correlation technique;
Fig. 2 is pilot channel, broadcast channel and the synchronizing channel limit of the low power base station community in correlation techniqueBoundary and downlink business boundary separation schematic diagram;
Fig. 3 is according to the flow chart of the channel quality indicator (CQI) method of adjustment of the embodiment of the present invention;
Fig. 4 is according to the structured flowchart of the channel quality indicator (CQI) adjusting device of the embodiment of the present invention;
Fig. 5 is according to the preferred structure block diagram one of the channel quality indicator (CQI) adjusting device of the embodiment of the present invention;
Fig. 6 is the low power base station structured flowchart according to the embodiment of the present invention;
Fig. 7 adjusts and processes stream for the CQI of UE feedback according to the low power cell of the embodiment of the present inventionJourney schematic diagram.
Detailed description of the invention
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments. It should be noted that, do not rushingIn prominent situation, the feature in embodiment and embodiment in the application can combine mutually.
A kind of channel quality indicator (CQI) method of adjustment is provided in the present embodiment, and Fig. 3 is according to the present inventionThe flow chart of the channel quality indicator (CQI) method of adjustment of embodiment, as shown in Figure 3, this flow process comprises as followsStep:
Step S302, the CQI of reception reported by user equipment UE;
Step S304, adjusts the CQI reporting according to pre-defined rule.
By above-mentioned steps, adopt and receive the CQI of reported by user equipment UE, according to pre-defined rule to reportingCQI adjusts, and has realized and has adopted the CQI that UE is reported to compensate to mate actual HS-PDSCHTransmission ability, having solved the UE that exists in correlation technique, to measure the CQI estimating bigger than normal, causes eating dishes without rice or wineThe bit error rate becomes large problem, and then has reached and avoid causing because CQI is bigger than normal the bit error rate of eating dishes without rice or wine to become large effectReally.
In a preferred embodiment, according to pre-defined rule, the CQI reporting is adjusted and comprised: according toFollowing formula is adjusted the CQI reporting: CQIadjusted＝CQI-W1, wherein, W1For being greater than0 integer, W1Determine according to the CQI reporting.
In a preferred embodiment, according to pre-defined rule, the CQI reporting is adjusted and comprised: according toFollowing formula is adjusted the CQI reporting: CQIadjusted＝W2× CQI, wherein, W2For being greater than0 and be less than 1 decimal, W2Determine according to the CQI reporting.
In a preferred embodiment, after the CQI reporting being adjusted according to pre-defined rule, alsoComprise: determine high speed-Physical Downlink Shared Channel HS-PDSCH according to the CQI of CQI mapping table and adjustmentInformation, wherein, the information of this HS-PDSCH comprise following one of at least: the transmission block of HS-PDSCHThe size of TB, HS-PDSCH code channel number, the modulation system of HS-PDSCH, the reference merit of HS-PDSCHRate is adjusted parameter. The CQI having realized by UE is reported compensates to mate actual HS-PDSCH'sThe object of transmission ability.
A kind of channel quality indicator (CQI) adjusting device is also provided in the present embodiment, and this device is for realizingAbove-described embodiment and preferred embodiment, carried out repeating no more of explanation. As used below, artThe combination of software and/or the hardware of predetermined function can be realized in language " module ". Although following examples are describedDevice preferably realize with software, but hardware, or the realization of the combination of software and hardware is also possibleAnd conceived.
Fig. 4 is according to the structured flowchart of the channel quality indicator (CQI) adjusting device of the embodiment of the present invention, as Fig. 4Shown in, this device comprises receiver module 42 and adjusting module 44, below this device is described.
Receiver module 42, for receiving the CQI of reported by user equipment UE; Adjusting module 44, is connected toState receiver module 42, for the CQI reporting being adjusted according to pre-defined rule.
Wherein, in this adjusting module, can adjust the CQI reporting according to following formula:Wherein, W1For being greater than 0 integer, W1Determine according to the CQI reporting.
Wherein, in this adjusting module, can also adjust the CQI reporting according to following formula:CQIadjusted＝W2× CQI, wherein, W2For being greater than 0 and be less than 1 decimal, W2According to reportingCQI determine.
Fig. 5 is according to the preferred structure block diagram one of the channel quality indicator (CQI) adjusting device of the embodiment of the present invention,As shown in Figure 5, this device, except comprising all modules shown in Fig. 4, also comprises determination module 52, belowThis determination module 52 is described.
Determination module 52, is connected to above-mentioned adjusting module 44, for according to the CQI of CQI mapping table and adjustmentDetermine the information of high speed-Physical Downlink Shared Channel HS-PDSCH, wherein, the packets of information of this HS-PDSCHDraw together following one of at least: the size of the transmission block TB of HS-PDSCH, HS-PDSCH code channel number,The modulation system of HS-PDSCH, the reference power of HS-PDSCH are adjusted parameter.
Fig. 6 is the low power base station structured flowchart according to the embodiment of the present invention, as shown in Figure 6, and this low-power baseThe 62 channel quality indicator (CQI) adjusting devices 64 that comprise above-mentioned any one of standing.
Adopt for low power base station the pilot tone situation that strengthens, because the P-CPICH pilot tone of low power cell coversScope is greater than the coverage of HS-PDSCH, and mobile phone can be estimated according to the P-CPICH pilot power measuringCQI, obviously causes the CQI of UE measurement estimation bigger than normal because the pilot power of P-CPICH strengthens, thisThe CQI that bright method low power cell reports for UE adjusts, reference formula 1 below, and then according toThe CQI mapping table of the CQI after adjustment and 3GPP regulation and stipulation determine HS-PDSCH TB size,HS-PDSCH code channel number, modulation system, reference power are adjusted parameter, and concrete CQI adjusts and revises flow process ginsengExamine Fig. 7, Fig. 7 carry out adjustment place according to the low power cell of the embodiment of the present invention for the CQI of UE feedbackReason schematic flow sheet.
CQIadjusted＝f(CQI)(1)
Wherein f (CQI) represents the mathematical function of CQI, according to emulation and test result, finalF (CQI) functional form may have multiple, enumerates two kinds of possibility functional forms below:
Wherein, a kind of way of realization can be: f (CQI)=CQI-W1, wherein W1To be greater than 0Integer, W1Can change according to the CQI size reporting. For example, in the time of CQI=15, W1=3; WhenWhen CQI=14, W1=3; In the time of CQI=13, W1＝2。
Above-mentioned way of realization can be also: f (CQI)=W2× CQI, wherein W2To be less than 1 to be greater than 0Decimal, W2Can change according to the CQI size reporting.
The above embodiment of the present invention is to adopt the method for CQI compensation to mate reality in low power base stationThe transmission ability of HS-PDSCH, avoids causing because CQI is bigger than normal the bit error rate of eating dishes without rice or wine to become large, promotesThe HSDPA service feature of low power cell and user's experience.
Obviously, it is apparent to those skilled in the art that above-mentioned of the present invention each module or each step can useGeneral calculation element is realized, and they can concentrate on single calculation element, or is distributed in multiple metersOn the network that calculation device forms, alternatively, they can be realized with the executable program code of calculation element,Thereby, they can be stored in storage device and be carried out by calculation element, and in some cases, canTo carry out shown or described step with the order being different from herein, or they are made into respectively to each collectionBecome circuit module, or the multiple modules in them or step are made into single integrated circuit module realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for this areaTechnical staff, the present invention can have various modifications and variations. It is within the spirit and principles in the present invention all,Any amendment of doing, be equal to replacement, improvement etc., within protection scope of the present invention all should be included in.
Claims (9)
1. a channel quality indicator (CQI) method of adjustment, is characterized in that, comprising:
Receive the CQI of reported by user equipment UE;
According to pre-defined rule, the described CQI reporting is adjusted.
2. method according to claim 1, is characterized in that, according to pre-defined rule to the described CQI reportingAdjust and comprise:
According to following formula, the described CQI reporting is adjusted:
CQIadjusted＝CQI-W1, wherein, described W1For being greater than 0 integer, described W1RootDetermine according to the described CQI reporting.
3. method according to claim 1, is characterized in that, according to pre-defined rule to the described CQI reportingAdjust and comprise:
According to following formula, the described CQI reporting is adjusted:
CQIadjusted＝W2× CQI, wherein, described W2For being greater than 0 and be less than 1 decimal,Described W2Determine according to the described CQI reporting.
4. method according to claim 1, is characterized in that, according to pre-defined rule to described in reportingAfter CQI adjusts, also comprise:
Determine the information of high speed-Physical Downlink Shared Channel HS-PDSCH according to the described CQI of CQI mapping table and adjustment, wherein, the information of described HS-PDSCH comprise following one of at least: described inThe tune of the size of the transmission block TB of HS-PDSCH, described HS-PDSCH code channel number, described HS-PDSCHThe reference power of mode processed, described HS-PDSCH is adjusted parameter.
5. a channel quality indicator (CQI) adjusting device, is characterized in that, comprising:
Receiver module, for receiving the CQI of reported by user equipment UE;
Adjusting module, for adjusting the described CQI reporting according to pre-defined rule.
6. device according to claim 5, is characterized in that, described adjusting module comprises:
According to following formula, the described CQI reporting is adjusted:
CQIadjusted＝CQI-W1, wherein, described W1For being greater than 0 integer, described W1RootDetermine according to the described CQI reporting.
7. device according to claim 5, is characterized in that, described adjusting module comprises:
According to following formula, the described CQI reporting is adjusted:
CQIadjusted＝W2× CQI, wherein, described W2For being greater than 0 and be less than 1 decimal,Described W2Determine according to the described CQI reporting.
8. device according to claim 5, is characterized in that, also comprises:
Determination module, for determining that according to the described CQI of CQI mapping table and adjustment high speed-physical down is commonEnjoy the information of channel HS-PDSCH, wherein, the information of described HS-PDSCH comprise following one of at least:The size of the transmission block TB of described HS-PDSCH, described HS-PDSCH code channel number, described HS-PDSCHThe reference power of modulation system, described HS-PDSCH adjust parameter.
9. a low power base station, is characterized in that, comprises the device described in any one in claim 5 to 8.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410614403.5A CN105591714A (en) | 2014-11-03 | 2014-11-03 | Channel quality indicator (CQI) adjusting method and apparatus, and low-power base station |
| PCT/CN2015/088900 WO2016070678A1 (en) | 2014-11-03 | 2015-09-02 | Channel quality indicator (cqi) adjusting method and device, and low-power base station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410614403.5A CN105591714A (en) | 2014-11-03 | 2014-11-03 | Channel quality indicator (CQI) adjusting method and apparatus, and low-power base station |
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| CN105591714A true CN105591714A (en) | 2016-05-18 |
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| CN201410614403.5A Withdrawn CN105591714A (en) | 2014-11-03 | 2014-11-03 | Channel quality indicator (CQI) adjusting method and apparatus, and low-power base station |
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| WO (1) | WO2016070678A1 (en) |
Cited By (1)
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| WO2018157365A1 (en) * | 2017-03-03 | 2018-09-07 | 南通朗恒通信技术有限公司 | Method and apparatus for user equipment and base station used for power regulation |
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| US20070173201A1 (en) * | 2003-06-26 | 2007-07-26 | Interdigital Technology Corporation | Method and apparatus for generating a correction term |
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| WO2018157365A1 (en) * | 2017-03-03 | 2018-09-07 | 南通朗恒通信技术有限公司 | Method and apparatus for user equipment and base station used for power regulation |
| CN111447665A (en) * | 2017-03-03 | 2020-07-24 | 南通朗恒通信技术有限公司 | Method and device used in user equipment and base station for power adjustment |
| US11178620B2 (en) | 2017-03-03 | 2021-11-16 | Shanghai Langbo Communication Technology Company Limited | Method and device in UE and base station for power adjustment |
| US11979841B1 (en) | 2017-03-03 | 2024-05-07 | Shanghai Langbo Communication Technology Company Limited | Method and device in UE and base station for power adjustment |
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| Publication number | Publication date |
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| WO2016070678A1 (en) | 2016-05-12 |
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Application publication date: 20160518 |