CN102265696B - Transmission resource scheduling method, apparatus and system - Google Patents

Abstract

The embodiment of the present invention discloses a transmission resource scheduling method, apparatus and system, wherein the method comprises the steps of: receiving CQI reported by UE; generating CQI adjustment values, wherein the CQI adjustment value is formed by the first and second CQI adjustment values, the first CQI adjustment value is determined according to a preset first CQI adjustment step, the target value of BLER and the measures value of the BLER, and the second CQI adjustment value is determined according to the change condition of the throughput rate of a UE air interface; adjusting the received CQI reported by the UE according to the CQI adjustment values; selecting TBS according to the adjusted CQI; and scheduling the transmission resource according to the TBS. The embodiment of the present invention also provides a transmission resource scheduling apparatus and system. The embodiment of the present invention furthest increases the property and throughput rate of cells.

Description

Method for scheduling resources transmitted, device and system

Technical field

The embodiment of the present invention relates to the communication technology, relates in particular to a kind of method for scheduling resources transmitted, device and system.

Background technology

64 quadrature amplitude modulations (Quadracture Amplitude Modulation; Hereinafter to be referred as: QAM), multiple-input and multiple-output (Multiple Input Multiple Output; Hereinafter to be referred as: enhanced high-speed data access (the Enhanced High Speed Packet Access such as MIMO); Hereinafter to be referred as: HSPA+) technology is that (the 3 third generation affiliate ^rdgeneration Partnership Project; Hereinafter to be referred as: the new technology of the descending throughput of lifting of 3GPP) introducing in R7 release protocol.High-speed downstream bag access (High Speed Downlink Packet Access; Hereinafter to be referred as: HSDPA), the major function of HSPA+ technology comprises Adaptive Modulation and Coding (Adaptive Modulation and Coding; Hereinafter to be referred as: AMC), mixed automatic retransfer (Hybrid Automatic Repeat Request; Hereinafter to be referred as: HARQ), shared channel share and high speed medium access is controlled (Media Access ControlHigh Speed; Hereinafter to be referred as: MAC-hs)/enhanced high-speed medium access (Media AccessControl-Enhanced High Speed; Hereinafter to be referred as: scheduling controlling strategy MAC-ehs) etc.Wherein, MAC-hs/MAC-ehs scheduling entity is relatively important, and it need to consider between a plurality of users of certain community, how to distribute limited high speed descending sharing channel (High Speed-Downlink ShareChannel; Hereinafter to be referred as: HS-DSCH) code word and power resource, also need to take into account subscriber equipment (UserEquipment; Hereinafter to be referred as: confirmation (Acknowledgment UE); Hereinafter to be referred as: ACK)/negative acknowledgment (Negative Acknowledgment; Hereinafter to be referred as: NACK), channel quality indication (ChannelQuality Indicator; Hereinafter to be referred as: CQI) feedback, dynamically to adjust MAC-hs/MAC-ehs protocol Data Unit (the Protocol Data Unit of transmission; Hereinafter to be referred as: PDU) transport block size (TransportBlock Size; Hereinafter to be referred as: TBS).

In the prior art, because agreement is lower to the requirement of subscriber equipment CQI measurement performance, and the reason of subscriber equipment self realization, the CQI that in real system, UE reports can not completely truly reflect actual channel quality.Under the interval and different wireless environment of different UE, different CQI, the Block Error Rate producing when dispatch according to the CQI of reporting of user base station (such as NodeB) alters a great deal, by analysis, emulation with experimental results show that, the variation of BLER size is very large on the impact of user's throughput, therefore base station need to be adjusted the CQI reporting, to obtain the CQI more adaptive with practical radio communication environment, thereby obtain larger performance gain.

CQI adjustment algorithm of the prior art only considers to reach BLER desired value how as far as possible, cannot realize the optimization of estate performance.

Summary of the invention

The embodiment of the present invention is to provide a kind of method for scheduling resources transmitted, device and system, improves substantially performance and the throughput of community.

To achieve these goals, the embodiment of the present invention provides a kind of method for scheduling resources transmitted, comprising:

Receive the channel quality indicator (CQI) of reported by user equipment UE;

Generate CQI adjusted value, described CQI adjusted value consists of a CQI adjusted value and the 2nd CQI adjusted value, wherein, it is definite that a described CQI adjusted value is adjusted step-length, the desired value of error rate BLER and the measured value of BLER according to a default CQI, and described the 2nd CQI adjusted value is determined according to the situation of change of the throughput of UE air interface;

The CQI described UE receiving being reported according to described CQI adjusted value adjusts;

According to the CQI after adjusting, select transport block size TBS;

According to described TBS, carry out the scheduling of transfer resource.

The embodiment of the present invention provides a kind of scheduling resources transmitted device, comprising:

Receiver module, for receiving the channel quality indicator (CQI) of reported by user equipment UE;

Generation module, be used for generating CQI adjusted value, described CQI adjusted value consists of a CQI adjusted value and the 2nd CQI adjusted value, wherein, it is definite that a described CQI adjusted value is adjusted step-length, the desired value of error rate BLER and the measured value of BLER according to a default CQI, and described the 2nd CQI adjusted value is determined according to the situation of change of the throughput of UE air interface;

Adjusting module, adjusts for the CQI described UE receiving being reported according to described CQI adjusted value;

Select module, for selecting transport block size TBS according to the CQI after adjusting;

Scheduler module, for carrying out the scheduling of transfer resource according to described TBS.

The embodiment of the present invention provides a kind of scheduling resources transmitted system, comprises base station and user equipment (UE), and described base station comprises above-mentioned scheduling resources transmitted device, and described UE is for indicating CQI to described base station reporting channel quality.

A kind of scheduling resources transmitted method of adjustment, device and system that the embodiment of the present invention provides, by generating the CQI adjusted value being formed by a CQI adjusted value and the 2nd CQI adjusted value, and according to a default CQI, adjust step-length, the desired value of BLER and the measured value of BLER and determine a CQI adjusted value, according to the situation of change of the throughput of UE air interface, determine the 2nd CQI adjusted value, CQI UE being reported according to CQI adjusted value adjusts, and then select TBS by the CQI after adjusting, according to this TBS, carry out scheduling transmission resources; The present embodiment, guaranteeing that CQI correction algorithm meets outside the requirement of BLER desired value, can obtain CQI adjusted value in conjunction with the throughput situation of change of UE air interface, and cell capacity is further promoted, and improves substantially performance and the throughput of community.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the flow chart of method for scheduling resources transmitted embodiment mono-of the present invention;

Fig. 2 is the flow chart of method for scheduling resources transmitted embodiment bis-of the present invention;

Fig. 3 is the signaling diagram of method for scheduling resources transmitted embodiment tri-of the present invention;

Fig. 4 is the structure chart of the scheduling resources transmitted device embodiment mono-of the present invention;

Fig. 5 is the structure chart of the scheduling resources transmitted device embodiment bis-of the present invention.

Embodiment

For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.

Fig. 1 is the flow chart of method for scheduling resources transmitted embodiment mono-of the present invention, and as shown in Figure 1, the present embodiment provides a kind of method for scheduling resources transmitted, can specifically comprise the steps:

Step 101, the channel quality indicator (CQI) of reception reported by user equipment UE.

This step is that base station receives the CQI that UE reports, and this CQI is that UE self gets, and the present embodiment is adjusted based on this CQI.

Step 102, generate CQI adjusted value, described CQI adjusted value consists of a CQI adjusted value and the 2nd CQI adjusted value, wherein, it is definite that a described CQI adjusted value is adjusted step-length, the desired value of error rate BLER and the measured value of BLER according to a default CQI, and described the 2nd CQI adjusted value is determined according to the situation of change of the throughput of UE air interface.

What deserves to be explained is, the error rate in the embodiment of the present invention, mainly with the initial error rate (InitialBlock Error; Hereinafter to be referred as: IBLER) for example describes, but be not limited to this.

Base station, after receiving the CQI that UE reports, first generates CQI adjusted value, with the CQI that UE is reported, adjusts.This CQI adjusted value can specifically can consist of two parts, i.e. a CQI adjusted value and the 2nd CQI adjusted value.Wherein, a CQI adjusted value can adjust according to a default CQI step-length, setting IBLER desired value and according to the confirmation (ACK) of UE feedback, negative acknowledgment (NACK) information measurement to the measured value of IBLER determine.The 2nd CQI adjusted value can specifically determine according to the situation of change of the throughput of UE air interface, and UE air interface herein can be specially UE Uu mouth.

Particularly, in the present embodiment, the 2nd CQI adjusted value Δ CQI ₂can specifically adopt following formula (1) to calculate:

ΔCQI ₂＝CQI _step2×Δ (1)

Wherein, CQI _step2be that the 2nd CQI adjusts step-length, Δ is that CQI adjusts coefficient, and described Δ is determined according to the magnitude relationship of throughput in two measurement periods of statistics.

More specifically, the first payload amount that the process that in the present embodiment, definite CQI adjusts coefficient delta can specifically comprise the steps: to add up the correct decoding of UE feedback in the first measurement period; According to the first payload amount, determine the first throughput of UE air interface in the first measurement period; Add up the second payload amount of the correct decoding of UE feedback in the second measurement period; According to the second payload amount, determine the second throughput of UE air interface in the second measurement period; Relatively the size of the first throughput and the second throughput, if when the second throughput is greater than the first throughput, determines that Δ is the first adjustment coefficient; When if the second throughput is less than or equal to the first throughput, determine that Δ is the second adjustment coefficient, wherein, first adjusts coefficient is greater than the second adjustment coefficient.

Particularly, in the present embodiment, can specifically adopt following formula (2) to determine an above-mentioned CQI adjusted value Δ CQI ₁:

$\mathrm{\Δ}{\mathrm{CQI}}_1={\mathrm{CQI}}_{\mathrm{ste}{p}_1}\×\frac{{\mathrm{IBLER}}_{t\arg \mathrm{et}}-{\mathrm{IBLER}}_{\mathrm{measure}}}{{\mathrm{IBLER}}_{t\arg \mathrm{et}}}---\left(2\right)$

Wherein, CQI _step1for a default CQI adjusts step-length, IBLER _targetfor the desired value of IBLER, IBLER _measuremeasured value for IBLER.

Step 103, the CQI UE receiving being reported according to CQI adjusted value adjusts.

After generating CQI adjusted value, the CQI that the UE that base station receives step 101 according to this CQI adjusted value reports adjusts, and can be specially this CQI adjusted value that superposes on the CQI basis reporting at UE and realize the adjustment to CQI.

Step 104, selects TBS according to the CQI after adjusting.

This step is that TBS is selected according to the CQI after above-mentioned steps adjustment in base station, specifically can obtain corresponding TBS with the mapping relations table of code channel number by searching CQI.Wherein, the step value of the CQI value of the mapping relations table of this CQI and code channel number can be specially 1dB, or also this step value specifically can be set to the value between 1dB and 0dB.

Step 105, carries out the scheduling of transfer resource according to TBS.

The scheduling of transfer resource, choosing after corresponding TBS according to the CQI after adjusting, is carried out according to this TBS in base station, to transmit data to UE.

Concrete, can be by the MAC-hs/MAC-ehs scheduling entity of base station, to be carried out the scheduling of respective transmissions resource, such as, be the corresponding HS-DSCH code source of TBS and the power resource of UE scheduling and selection.

In addition, what deserves to be explained is, the embodiment of the present invention can Wideband Code Division Multiple Access (WCDMA), and (Wideband CodeDivision Multiple Access, is called for short: WCDMA) system is that example is described, can be specifically the WCDMA system of having introduced HSDPA, corresponding base station can be NodeB.But be understandable that, at other, utilize the communication system of CQI mechanism, such as Time Division-Synchronous Code Division Multiple Access (TimeDivision-Synchronous Code Division Multiple Access, be called for short: TD-SCDMA), code division multiple access CDMA2000 and long evolving system (Long Term Evolution, be called for short: LTE) etc., in system, the scheme that the present embodiment provides can adopt equally.And the executive agent of corresponding steps can be the scheduling resources transmitted equipment of corresponding system.

The present embodiment provides a kind of method for scheduling resources transmitted, by generating the CQI adjusted value being formed by a CQI adjusted value and the 2nd CQI adjusted value, and according to a default CQI, adjust step-length, the desired value of BLER and the measured value of BLER and determine a CQI adjusted value, according to the situation of change of the throughput of UE air interface, determine the 2nd CQI adjusted value, CQI UE being reported according to CQI adjusted value adjusts, and then select TBS by the CQI after adjusting, according to this TBS, carry out scheduling transmission resources; The present embodiment, guaranteeing that CQI correction algorithm meets outside the requirement of BLER desired value, can obtain CQI adjusted value in conjunction with the throughput situation of change of UE air interface, and cell capacity is further promoted, and improves substantially performance and the throughput of community.

Fig. 2 is the flow chart of method for scheduling resources transmitted embodiment bis-of the present invention, and as shown in Figure 2, the present embodiment provides a kind of method for scheduling resources transmitted, can specifically comprise the steps:

Step 201, base station receives the CQI that UE reports.

Step 202, base station is adjusted step-length, the desired value of IBLER and the measured value of IBLER according to a default CQI and is determined a CQI adjusted value.

Step-length CQI, according to can specifically adopting the CQI correction algorithm shown in above-mentioned formula (2), is adjusted according to a default CQI in base station _step1, IBLER desired value IBLER _targetmeasured value IBLER with IBLER _measuredetermine a CQI adjusted value Δ CQI ₁, wherein, CQI _step1can preset according to actual conditions, as being set to 1dB or 0.5dB, IBLER _targetcan set according to actual conditions IBLER _measurefor measuring according to ACK, the nack message of UE feedback.

Step 203, the first payload amount of the correct decoding of UE feedback in the first measurement period is added up in base station, and according to the first payload amount, determines the first throughput of UE air interface in the first measurement period.

The present embodiment is when adjusting CQI, and base station is using the throughput of UE as taking into account with reference to factor, determines that the CQI in the computing formula of the 2nd CQI adjusted value adjusts coefficient delta according to the situation of change of the throughput of UE air interface.Be specially base station and with the measurement period of setting, the throughput of UE added up, and obtain the magnitude relationship of throughput in adjacent two measurement periods, throughput herein can be specially the actual reception throughput of UEUu mouth.In adjacent two cycles, the magnitude relationship of throughput is different, and it is also different that the corresponding CQI getting adjusts coefficient, and then the size of CQI value is exerted an influence, and realizes and according to the throughput of UE, CQI value being adjusted.Wherein, the present embodiment can specifically be set as τ=N*TTI by measurement period, and wherein, N is positive integer, and TTI represents a Transmission Time Interval (Transport TimeInterval; Hereinafter to be referred as: time TTI).This regulation of sentencing 3GPP TS 25.211 agreements is that example describes, due to the data block of base station every a TBS size of a TTI=2ms scheduling, and generally through 6 TTI, receive the ACK/NACK that UE feeds back to, therefore, the N in the period tau formula of statistics can be set as to 6 multiple.

This step is specially the first payload amount that the correct decoding of UE feedback in the first measurement period is added up in base station, and according to the first payload amount, determine and the first throughput of UE air interface in the first measurement period the first throughput of UE air interface in the first measurement period can be designated as to T herein _n.Particularly, can, by the first payload amount of the correct decoding of UE feedback in the first measurement period is added up, generate the first throughput herein.

Step 204, the second payload amount of the correct decoding of UE feedback in the second measurement period is added up in base station, and according to described the second payload amount, determines the second throughput of UE air interface in described the second measurement period.

This step is specially the second payload amount that the correct decoding of UE feedback in the second measurement period is added up in base station, and according to the second payload amount, determine and the second throughput of UE air interface in the second measurement period the second throughput of UE air interface in the second measurement period can be designated as to T herein _n+1.Wherein, the second measurement period is a rear measurement period adjacent with the first measurement period.Particularly, can, by the second payload amount of the correct decoding of UE feedback in the second measurement period is added up, generate the second throughput herein.

Step 205, base station judges whether the second throughput is greater than the first throughput, if so, performs step 206, otherwise execution step 207.

In the statistics that completes two throughputs in adjacent measurement period, by above-mentioned steps, get the first throughput T _nwith the second throughput T _n+1after, the situation of change of the throughput in more adjacent two measurement periods in base station.Base station judges the second throughput T in the second measurement period _n+1whether be greater than the first throughput T in the first measurement period _n, if so, carry out subsequent step 206, otherwise execution step 207.

Step 206, base station determines that it is the first adjustment coefficient that CQI adjusts coefficient delta, and performs step 208.

The second throughput T in the second measurement period _n+1be greater than the first throughput T in the first measurement period _ntime, base station is adjusted coefficient delta by CQI and is defined as the first adjustment coefficient, and continues to carry out subsequent step 208.In the present embodiment first adjusted coefficient can be specially 1, can specifically by following formula (3), be represented:

$\mathrm{\&Delta;}=\left\{\begin{array}{cc}0,& \mathrm{IF}(T_n\&GreaterEqual;T_{n+1})\\ +1,& \mathrm{IF}(T_n<T_{n+1})\end{array}\right.---\left(3\right)$

Step 207, base station determines that it is the second adjustment coefficient that CQI adjusts coefficient delta, and performs step 208.

The second throughput T in the second measurement period _n+1be less than or equal to the first throughput T in the first measurement period _ntime, base station is adjusted coefficient delta by CQI and is defined as the second adjustment coefficient, and continues to carry out subsequent step 208.Wherein, first in the present embodiment adjusted coefficient and is greater than the second adjustment coefficient, and second in the present embodiment adjusted coefficient can be specially 0, as shown in above-mentioned formula (3).In the present embodiment when measurement period obtains below throughput is greater than the throughput that adjacent last measurement period obtains, increase CQI and adjust coefficient, thereby follow-up CQI adjusted value is increased, and then increase the CQI after adjusting, so that it can adapt to the throughput after increase.

Step 208, base station adjusts coefficient according to CQI and the 2nd CQI adjustment step-length is determined the 2nd CQI adjusted value.

After getting CQI adjustment coefficient delta, according to this CQI, adjust coefficient delta and the 2nd default CQI adjustment step-length CQI _step2, adopt above-mentioned formula (1), specifically determine the 2nd CQI adjusted value Δ CQI ₂.Wherein, the 2nd CQI adjusts step-length CQI _step2can set according to actual conditions, as be set as 1dB, 0.5dB or 0.25dB etc., also can be set as adjusting step-length CQI with a CQI _step1equal value.

In the present embodiment, base station is at definite the 2nd CQI adjusted value Δ CQI ₂time, the different class of the CQI scope under the CQI that can also report for UE arrange the 2nd different CQI and adjust step-length CQI _step2.For example, suppose that it is 0-30dB that UE reports CQI scope, can first CQI scope be divided into N class, when N=4, can be divided into [0,15], [15,20], [20,25], [25,30] four class, the CQI that UE can be reported corresponds to respectively different class.Determining that the 2nd CQI adjusts step-length CQI _step2time, the different class of the CQI scope under the CQI that can report for UE arrange the 2nd different CQI and adjust step-length CQI _step2, for example, the 2nd CQI of low-grade correspondence can be adjusted to step-length CQI _step2arrange largerly, high-grade the 2nd corresponding CQI is adjusted to step-length CQI _step2arrange smallerly, for example can be by CQI corresponding to [0,15] this class _step2be set to 0.5dB, by CQI corresponding to [25,30] this class _step2be set to 0.25dB, specifically to determine its adjusted value according to different CQI, meet the demand of different actual conditions.Be understandable that, when N gets 1, be equivalent to regardless of class.

Step 209, base station generates CQI adjusted value according to a CQI adjusted value and the 2nd CQI adjusted value.

Calculating a CQI adjusted value Δ CQI and the 2nd CQI adjusted value Δ CQI ₂after, base station is in the 2 τ end of term in week, according to Δ CQI ₁with Δ CQI ₂specifically generate CQI adjusted value Δ CQI, specifically the two phase Calais can be obtained, adopt following formula (4) to generate CQI adjusted value Δ CQI:

$\mathrm{\&Delta;CQI}=\mathrm{\&Delta;}{\mathrm{CQI}}_1+\mathrm{\&Delta;}{\mathrm{CQI}}_2={\mathrm{CQI}}_{\mathrm{ste}{p}_1}\&times;\frac{{\mathrm{IBLER}}_{t\arg \mathrm{et}}-{\mathrm{IBLER}}_{\mathrm{measure}}}{{\mathrm{IBLER}}_{t\arg \mathrm{et}}}+{\mathrm{CQI}}_{\mathrm{step}2}\&times;\mathrm{\&Delta;}---\left(4\right)$

Be understandable that, the step of above-mentioned calculating the one CQI adjusted value and calculating the 2nd CQI adjusted value, sequential is not limit, and can carry out simultaneously yet.

Step 210, the CQI that base station reports the UE receiving according to CQI adjusted value adjusts.

By above-mentioned formula (4), calculating after CQI adjusted value Δ CQI, the CQI that base station just can report UE according to this CQI adjusted value Δ CQI adjusts, and specifically can adopt following formula (5) to calculate the CQI after adjustment:

CQI _tfrc＝CQI _report+ΔCQI (5)

Wherein, CQI _tfrcfor the CQI after adjusting, CQI _reportthe CQI reporting for UE.

Step 211, TBS is selected according to the CQI after adjusting in base station.

In the present embodiment, after the CQI that UE is reported adjusts, can be according to the CQI after adjusting, i.e. CQI _tfrcand specifically search the CQI value set in 25.214 agreements and the mapping relations table (for example Table 7A form in 25.214 agreements) of code channel number, be in the present embodiment as following table 1, the TBS that selects subsequent transmission scheduling of resource to use, utilizes best TBS to promote throughput thereby realize.Wherein, the step value of the CQI value in the mapping relations table in the present embodiment can be specially 1dB.Or, the step value of the CQI value in the mapping relations table in the present embodiment also can be specifically between 1dB and 0dB, as 0.5dB, 0.25dB etc., thereby make this mapping relations table discretization more, when selecting TBS according to this mapping relations table, can obtain TBS more accurately.

The mapping relations table of table 1 CQI value and code channel number

Step 212, the scheduling of transfer resource is carried out in base station according to TBS.

The scheduling of transfer resource, choosing after corresponding TBS according to the CQI after adjusting, is carried out according to this TBS in base station, to transmit data to UE.

The present embodiment provides a kind of method for scheduling resources transmitted, by generating the CQI adjusted value being formed by a CQI adjusted value and the 2nd CQI adjusted value, and according to a default CQI, adjust step-length, the desired value of IBLER and the measured value of IBLER and determine a CQI adjusted value, according to the situation of change of the throughput of UE air interface, determine the 2nd CQI adjusted value, CQI UE being reported according to CQI adjusted value adjusts, and then select TBS by the CQI after adjusting, according to this TBS, carry out scheduling transmission resources; The present embodiment, guaranteeing that CQI correction algorithm meets outside the requirement of IBLER desired value, can further be adjusted the CQI adjusted value calculating in CQI correction algorithm in conjunction with the reception throughput situation of UE in measurement period, and cell capacity is further promoted; Further, the present embodiment can be realized and select more exactly corresponding TBS, thereby improve substantially performance and the throughput of community by further quantizing the mapping relations table of CQI and code channel number, further reduces the BLER of UE.

Fig. 3 is the signaling diagram of method for scheduling resources transmitted embodiment tri-of the present invention, and as shown in Figure 3, the present embodiment provides a kind of method for scheduling resources transmitted, can specifically comprise the steps:

Step 301, UE reports CQI to base station.

Step 302, base station is adjusted step-length, the desired value of IBLER and the measured value of IBLER according to a default CQI and is determined a CQI adjusted value.

Step 303, base station determines that by adding up the magnitude relationship of the throughput of UE air interface in adjacent two measurement periods CQI adjusts coefficient, this step can similar above-mentioned steps 203-208.

Step 304, base station adjusts step-length according to the 2nd default CQI and CQI adjusts parameter identification the 2nd CQI adjusted value.

Step 305, base station generates CQI adjusted value according to a CQI adjusted value and the 2nd CQI adjusted value.

Step 306, the CQI that base station reports the UE receiving according to CQI adjusted value adjusts.

Step 307, TBS is selected according to the CQI after adjusting in base station.

Step 308, base station according to TBS to UE transfer resource.

The present embodiment provides a kind of method for scheduling resources transmitted, by generating the CQI adjusted value being formed by a CQI adjusted value and the 2nd CQI adjusted value, and according to a default CQI, adjust step-length, the desired value of IBLER and the measured value of IBLER and determine a CQI adjusted value, according to the situation of change of the throughput of UE air interface, determine the 2nd CQI adjusted value, CQI UE being reported according to CQI adjusted value adjusts, and then select TBS by the CQI after adjusting, according to this TBS, carry out scheduling transmission resources; The present embodiment, guaranteeing that CQI correction algorithm meets outside the requirement of IBLER desired value, can further be adjusted the CQI adjusted value calculating in CQI correction algorithm in conjunction with the reception throughput situation of UE in measurement period, and cell capacity is further promoted; Further, the present embodiment, by further quantizing the mapping relations table of CQI and code channel number, is realized and is selected more exactly corresponding TBS, thereby improve substantially performance and the throughput of community, further reduces the BLER of UE.

One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can complete by the relevant hardware of program command, aforesaid program can be stored in a computer read/write memory medium, this program, when carrying out, is carried out the step that comprises said method embodiment; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.

Fig. 4 is the structure chart of the scheduling resources transmitted device embodiment mono-of the present invention, and as shown in Figure 4, the present embodiment provides a kind of scheduling resources transmitted device, can specifically carry out each step in said method embodiment mono-, repeats no more herein.

The scheduling resources transmitted device that the present embodiment provides can specifically comprise receiver module 401, generation module 402, adjusting module 403, select module 404 and scheduler module 405.

Wherein, receiver module 401 is for receiving the channel quality indicator (CQI) of reported by user equipment UE.Generation module 402 is for generating CQI adjusted value, described CQI adjusted value consists of a CQI adjusted value and the 2nd CQI adjusted value, wherein, it is definite that a described CQI adjusted value is adjusted step-length, the desired value of error rate BLER and the measured value of BLER according to a default CQI, and described the 2nd CQI adjusted value is determined according to the situation of change of the throughput of UE air interface.This CQI adjusted value can specifically can consist of two parts, i.e. a CQI adjusted value and the 2nd CQI adjusted value.Wherein, a CQI adjusted value can adjust according to a default CQI step-length, setting BLER desired value and according to the confirmation (ACK) of UE feedback, negative acknowledgment (NACK) information measurement to the measured value of BLER determine.The 2nd CQI adjusted value can specifically determine according to the situation of change of the throughput of UE air interface, and UE air interface herein can be specially UE Uu mouth.Adjusting module 403 is adjusted for the CQI described UE receiving being reported according to described CQI adjusted value.After generating CQI adjusted value, the CQI that the UE that base station receives step 101 according to this CQI adjusted value reports adjusts, can be specially this CQI adjusted value that superposes on the CQI basis reporting at UE and realize the adjustment to CQI, the concrete above-mentioned formula (5) that adopts calculates the CQI after adjustment.Select module 404 for selecting transport block size TBS according to the CQI after adjusting.Scheduler module 405 is for carrying out the scheduling of transfer resource according to described TBS.

What deserves to be explained is, the error rate in the embodiment of the present invention, the initial error rate IBLER of mainly take describes as example, but is not limited to this.

Fig. 5 is the structure chart of the scheduling resources transmitted device embodiment bis-of the present invention, and as shown in Figure 5, the present embodiment provides a kind of scheduling resources transmitted device, can specifically carry out each step in said method embodiment bis-, repeats no more herein.

The scheduling resources transmitted device that the present embodiment provides is on the basis shown in above-mentioned Fig. 4, and generation module 402 can specifically comprise the first generation unit 412, determining unit 422 and the second generation unit 432.Wherein, the first generation unit 412 is determined a CQI adjusted value for adjusting step-length, the desired value of IBLER and the measured value of IBLER according to a default CQI.Determining unit 422 is for determining that according to the magnitude relationship of the throughput of UE air interface in two measurement periods of statistics CQI adjusts coefficient.The second generation unit 432 is for adopting above-mentioned formula (1) to determine described the 2nd CQI adjusted value.Calculating a CQI adjusted value Δ CQI ₁with the 2nd CQI adjusted value Δ CQI ₂after, base station is in the 2 τ end of term in week, according to Δ CQI ₁with Δ CQI ₂specifically generate CQI adjusted value Δ CQI, specifically the two phase Calais can be obtained, adopt above-mentioned formula (4) to generate CQI adjusted value Δ CQI.

Particularly, determining unit 422 can specifically comprise the definite subelement 4222 of the first statistics subelement 4221, first, second statistics subelement 4223, second definite subelement 4224 and compare subelement 4225.The measurement period that is specially to set is added up the throughput of UE, and obtains the magnitude relationship of throughput in adjacent two measurement periods, and throughput herein can be specially the actual reception throughput of UE Uu mouth.In adjacent two cycles, the magnitude relationship of throughput is different, and it is also different that the corresponding CQI getting adjusts coefficient, and then the size of CQI value is exerted an influence, and realizes and according to the throughput of UE, CQI value being adjusted.Wherein, the present embodiment can specifically be set as τ=N*TTI by measurement period, and wherein, N is positive integer.This regulation of sentencing 3GPP TS 25.211 agreements is that example describes, due to the data block of base station every a TBS size of a TTI=2ms scheduling, and generally through 6 TTI, receive the ACK/NACK that UE feeds back to, therefore, the N in the period tau formula of statistics can be set as to 6 multiple.

Wherein, the first statistics subelement 4221 is for adding up the first payload amount of the correct decoding of described UE feedback in the first measurement period.First determines that subelement 4222 can be designated as T by the first throughput of UE air interface in the first measurement period herein by the first throughput of UE air interface in described the first measurement period for determining according to described the first payload amount _n.Particularly, can, by the first payload amount of the correct decoding of UE feedback in the first measurement period is added up, generate the first throughput herein.The second statistics subelement 4223 is for adding up the second payload amount of the correct decoding of described UE feedback in the second measurement period.Second determines that subelement 4224 can be designated as T by the second throughput of UE air interface in the second measurement period herein by the second throughput of UE air interface in described the second measurement period for determining according to described the second payload amount _n+1, wherein, the second measurement period is a rear measurement period adjacent with the first measurement period.Particularly, can, by the second payload amount of the correct decoding of UE feedback in the second measurement period is added up, generate the second throughput herein.Relatively subelement 4225, for the size of more described the first throughput and the second throughput, if when described the second throughput is greater than the first throughput, determines that Δ is the first adjustment coefficient; When if described the second throughput is less than or equal to the first throughput, determine that Δ is the second adjustment coefficient, wherein, described first adjusts coefficient is greater than the second adjustment coefficient.Particularly, the adjustment of first in the present embodiment coefficient can be specially 1, the second adjustment coefficient can be specially 0, can specifically by above-mentioned formula (3), be represented.In the present embodiment when measurement period obtains below throughput is greater than the throughput that adjacent last measurement period obtains, increase CQI and adjust coefficient, thereby follow-up CQI adjusted value is increased, and then increase the CQI after adjusting, so that it can adapt to the throughput after increase.

More specifically, the first generation unit 412 in the present embodiment is specifically for adopting above-mentioned formula (2) to determine a described CQI adjusted value.CQI correction algorithm shown in the above-mentioned formula of concrete employing (2), adjusts step-length CQI according to a default CQI _step1, IBLER desired value IBLER _targetmeasured value IBLER with IBLER _measuredetermine a CQI adjusted value Δ CQI ₁, wherein, CQI _step1can preset according to actual conditions, as being set to 1dB or 0.5dB, IBLER _targetcan set according to actual conditions IBLER _measurefor measuring according to ACK, the nack message of UE feedback.

Further, selection module 404 in the present embodiment can be specifically for by searching the mapping relations table of CQI value and code channel number, select the corresponding TBS of CQI after adjusting, wherein, the step value of the CQI value of described mapping relations table is 1dB, or the step value of the CQI value of described mapping relations table is between 1dB and 0dB.In the present embodiment, after the CQI that UE is reported adjusts, can be according to the CQI after adjusting, i.e. CQI _tfrc, and specifically searching the CQI value set in 25.214 agreements and the mapping relations table of code channel number, the TBS that selects subsequent transmission scheduling of resource to use, utilizes best TBS to promote throughput thereby realize.Wherein, the step value of the CQI value in the mapping relations table in the present embodiment can be specially 1dB.Or, the step value of the CQI value in the mapping relations table in the present embodiment also can be specifically between 1dB and 0dB, as 0.5dB, 0.25dB etc., thereby make this mapping relations table discretization more, when selecting TBS according to this mapping relations table, can obtain TBS more accurately.The present embodiment provides a kind of scheduling resources transmitted device, by generating the CQI adjusted value being formed by a CQI adjusted value and the 2nd CQI adjusted value, and according to a default CQI, adjust step-length, the desired value of BLER and the measured value of BLER and determine a CQI adjusted value, according to the situation of change of the throughput of UE air interface, determine the 2nd CQI adjusted value, CQI UE being reported according to CQI adjusted value adjusts, and then select TBS by the CQI after adjusting, according to this TBS, carry out scheduling transmission resources; The present embodiment, guaranteeing that CQI correction algorithm meets outside the requirement of BLER desired value, can further be adjusted the CQI adjusted value calculating in CQI correction algorithm in conjunction with the reception throughput situation of UE in measurement period, and cell capacity is further promoted; Further, the present embodiment, by further quantizing the mapping relations table of CQI and code channel number, is realized and is selected more exactly corresponding TBS, thereby improve substantially performance and the throughput of community, further reduces the BLER of UE.

The present embodiment also provides a kind of scheduling resources transmitted system, can specifically comprise base station and user equipment (UE), and wherein, base station can specifically comprise the scheduling resources transmitted device shown in above-mentioned Fig. 4 or Fig. 5, and UE is for indicating CQI to base station reporting channel quality.

Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record previous embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of embodiment of the present invention technical scheme.

Claims (3)

1. a method for scheduling resources transmitted, is characterized in that, comprising:

Receive the channel quality indicator (CQI) of reported by user equipment UE;

Generate CQI adjusted value, described CQI adjusted value consists of a CQI adjusted value and the 2nd CQI adjusted value, wherein, it is definite that a described CQI adjusted value is adjusted step-length, the desired value of error rate BLER and the measured value of BLER according to a default CQI, and described the 2nd CQI adjusted value is determined according to the situation of change of the throughput of UE air interface;

The CQI described UE receiving being reported according to described CQI adjusted value adjusts;

According to the CQI after adjusting, select transport block size TBS;

According to described TBS, carry out the scheduling of transfer resource;

Described according to the CQI selection TBS after adjusting, comprising:

By searching the mapping relations table of CQI value and code channel number, select the corresponding TBS of CQI after adjusting, wherein, the step value of the CQI value of described mapping relations table is 1dB, or the step value of the CQI value of described mapping relations table is between 1dB and 0dB;

Described the 2nd CQI adjusted value is determined according to the situation of change of the throughput of UE air interface, being comprised:

Adopt following formula to determine described the 2nd CQI adjusted value: CQI _step2* △,

Wherein, CQI _step2be that the 2nd CQI adjusts step-length, △ is that CQI adjusts coefficient, and described △ determines according to the magnitude relationship of the throughput of UE air interface in two measurement periods of statistics;

It is definite that a described CQI adjusted value is adjusted step-length, the desired value of BLER and the measured value of BLER according to a default CQI, comprising:

Adopt following formula to determine a described CQI adjusted value:

Wherein, CQI _step1for a described default CQI adjusts step-length, IBLER _targetfor the desired value of described BLER, IBLER _measuremeasured value for described BLER;

Described △ determines according to the magnitude relationship of the throughput of UE air interface in two measurement periods of statistics, comprising:

Add up the first payload amount of the correct decoding of described UE feedback in the first measurement period;

According to described the first payload amount, determine the first throughput of UE air interface in described the first measurement period;

Add up the second payload amount of the correct decoding of described UE feedback in the second measurement period;

According to described the second payload amount, determine the second throughput of UE air interface in described the second measurement period;

The size of more described the first throughput and the second throughput, if when described the second throughput is greater than the first throughput, determines that △ is the first adjustment coefficient; When if described the second throughput is less than or equal to the first throughput, determine that △ is the second adjustment coefficient, wherein, described first adjusts coefficient is greater than the second adjustment coefficient.

2. a scheduling resources transmitted device, is characterized in that, comprising:

Receiver module, for receiving the channel quality indicator (CQI) of reported by user equipment UE;

Generation module, be used for generating CQI adjusted value, described CQI adjusted value consists of a CQI adjusted value and the 2nd CQI adjusted value, wherein, it is definite that a described CQI adjusted value is adjusted step-length, the desired value of error rate BLER and the measured value of BLER according to a default CQI, and described the 2nd CQI adjusted value is determined according to the situation of change of the throughput of UE air interface;

Adjusting module, adjusts for the CQI described UE receiving being reported according to described CQI adjusted value;

Select module, for selecting transport block size TBS according to the CQI after adjusting;

Scheduler module, for carrying out the scheduling of transfer resource according to described TBS;

Described selection module is specifically for by searching the mapping relations table of CQI value and code channel number, select the corresponding TBS of CQI after adjusting, wherein, the step value of the CQI value of described mapping relations table is 1dB, or the step value of the CQI value of described mapping relations table is between 1dB and 0dB;

Described generation module comprises:

The first generation unit, determines a CQI adjusted value for adjusting step-length, the desired value of BLER and the measured value of BLER according to a default CQI;

Determining unit, for determining that according to the magnitude relationship of the throughput of UE air interface in two measurement periods of statistics CQI adjusts coefficient;

The second generation unit, for adopting following formula to determine described the 2nd CQI adjusted value: CQI _step2* △,

Wherein, CQI _step2be that the 2nd CQI adjusts step-length, △ is that described CQI adjusts coefficient;

Described the first generation unit is specifically for adopting following formula to determine a described CQI adjusted value: ${\mathrm{CQI}}_{{\mathrm{step}}_1}\&times;\frac{{\mathrm{IBLER}}_{t\arg \mathrm{et}}-{\mathrm{IBLER}}_{\mathrm{measure}}}{{\mathrm{IBLER}}_{t\arg \mathrm{et}}},$

Wherein, CQI _step1for a described default CQI adjusts step-length, IBLER _targetfor the desired value of described BLER, IBLER _measuremeasured value for described BLER;

Described determining unit comprises:

The first statistics subelement, for adding up the first payload amount of the correct decoding of described UE feedback in the first measurement period;

First determines subelement, for determine the first throughput of UE air interface in described the first measurement period according to described the first payload amount;

The second statistics subelement, for adding up the second payload amount of the correct decoding of described UE feedback in the second measurement period;

Second determines subelement, for determine the second throughput of UE air interface in described the second measurement period according to described the second payload amount;

Relatively subelement, for the size of more described the first throughput and the second throughput, if when described the second throughput is greater than the first throughput, determines that △ is the first adjustment coefficient; When if described the second throughput is less than or equal to the first throughput, determine that △ is the second adjustment coefficient, wherein, described first adjusts coefficient is greater than the second adjustment coefficient.

3. a scheduling resources transmitted system, is characterized in that, comprises base station and user equipment (UE), and described base station comprises the scheduling resources transmitted device described in the claims 2, and described UE is for indicating CQI to described base station reporting channel quality.