CN102088730A - Modulation and coding scheme correction processing method and base station in space division system - Google Patents

Abstract

The invention discloses a modulation and coding scheme correction processing method and a base station in a space division system. The method comprises the following steps of: judging whether a user switches between a space division state and a non space division state; and if so, performing correction on a modulation and coding scheme. By the method, the problem that quality indication of a terminal measurement feedback channel cannot truly indicate the present channel condition caused by hopping of the signal-to-noise ratio of a high speed physical downlink shared channel caused by variation of a space division situation can be reduced or eliminated, so the system performance at space division can be promoted.

Description

Modulation coding mode correcting process method and base station in a kind of space division system

Technical field

The present invention relates to moving communicating field, modulation coding mode correcting process method and base station in particularly a kind of space division system.

Background technology

At HSDPA (High Speed Downlink Packet Access, high speed downlink packet inserts) system, when being dispatched to some users and carrying out resource allocation and MCS (Modulation and Coding Scheme, during modulation coding mode) selection, need utilize CQI (the Channel Quality Indicator of terminal feedback, the channel quality indication), contain RTBS (Recommended Transport Block Size among the CQI of feedback, the transmission block size of recommending) and RMF (Recommended Modulation Format, the modulation system of recommending), when the HSDPA system introduces SDMA (Space Division Multiple Access, space division multiple access) after, terminal is measured HS-PDSCH (High Speed Physical Downlink Shared Channel, the high-speed downstream Physical Shared Channel) SIR (Signal Interference Ratio, signal interference ratio) saltus step can take place, the situation behind the introducing SDMA is not considered in existing MCS system of selection.

Therefore, the deficiencies in the prior art are: the MCS that needs during base station scheduling is inaccurate, not real reflection channel condition, and this will certainly influence systematic function.

Summary of the invention

The invention provides MCS correcting process method and base station in a kind of space division system, the accuracy of needed MCS during in order to the raising base station scheduling.

MCS correcting process in a kind of space division system method is provided in the embodiment of the invention, has comprised the steps:

Determine whether the user empty minute state and non-NULL has been taken place divided switching between the state;

When switching, MCS is carried out correcting process.

Preferably, when determining whether the user empty minute state and non-NULL have taken place divides switching between the state, determine according to HS-PDSCH benchmark solid size road power and the right power proportions of user shared pairing user whether the user switching has taken place.

Preferably, determine that according to HS-PDSCH benchmark solid size road power and the right power proportions of user shared pairing user whether the user switching has taken place, and comprising:

Determine $\mathrm{\β}=\frac{P_{\mathrm{code}}\left(n\right)}{P_{\mathrm{code}}(n-1)},$ Wherein, P _Code(n-1)=α (n-1) * P _CodeDuring for this user of last scheduled, the transmitting power in this user's solid size road, P _Code(n)=α (n) * P _CodeWhen dispatching this user for this, the transmitting power in this user's solid size road, $P_{\mathrm{code}}=\frac{P_{\mathrm{HS}-\mathrm{PDSCH}}}{16}$ Be HS-PDSCH benchmark solid size road power, P _HS-PDSCHBe the maximum transmission power that HS-PDSCH allows, when α (n-1) is this user of last scheduled, the right power proportions of this UE shared pairing user, when not matching the user, α (n-1)=1, when sky divides between the user five equilibrium power,

When α (n) dispatches this user for this, the right power proportions of this UE shared pairing user, when not matching the user, α (n)=1, when sky divides between the user five equilibrium power,

When β＞1, determine that the user switches to non-NULL by sky branch state and divides state; When β＜1, determine that the user divides state to switch to empty branch state by non-NULL; β=1 determines that the user empty branch state and non-NULL do not take place divide switching between the state.

Preferably, MCS is carried out correcting process, comprising:

When determining that this dispatches this user, data block transmitted length is TBS next time _k(n)=(N _k(n)/N _k(n-1)) * TBS _k(n-1), wherein: this dispatches this user's N _k(n)=min{NodeB surplus resources (code channel), the UE maximum can be handled code channel number }, the UE maximum can be handled code channel number by the decision of UE ability level, this user's of last scheduled N _k(n-1)=min{NodeB surplus resources (code channel), the UE maximum can be handled code channel number }, the UE maximum can be handled code channel number and be determined by the UE ability level;

To TBS _k(n) do following correction:

TBS _k(n)=(N _k(n)/N _k(n-1)) * (TBS _k(n-1)+and f (β)), wherein, f (β) is the MCS correction.

Preferably, determine that f (β) comprising:

According to user feedback RTBS, be made as TBS1=TBS _k(n-1)), by inquiry signal to noise ratio and transmission TB block size form, obtain its corresponding SIR1;

Calculate SIR2=SIR1+10 * log (β);

By inquiry signal to noise ratio and transmission TB block size form, obtain the TBS2 of SIR2 correspondence;

Determine f (β)=TBS2-TBS1.

A kind of base station is provided in the embodiment of the invention, has comprised:

Switch determination module, be used for determining whether the user empty minute state and non-NULL has been taken place divided switching between the state;

Correcting module is used for when switching, and MCS is carried out correcting process.

Preferably, switching determination module is further used for determining according to HS-PDSCH benchmark solid size road power and the right power proportions of user shared pairing user whether the user switching has taken place when determining whether the user empty minute state and non-NULL have taken place divides switching between the state.

Preferably, switching determination module comprises:

Determining unit is used to determine $\mathrm{\β}=\frac{P_{\mathrm{code}}\left(n\right)}{P_{\mathrm{code}}(n-1)},$ Wherein, P _Code(n-1)=α (n-1) * P _CodeDuring for this user of last scheduled, the transmitting power in this user's solid size road, P _Code(n)=α (n) * P _CodeWhen dispatching this user for this, the transmitting power in this user's solid size road, $P_{\mathrm{code}}=\frac{P_{\mathrm{HS}-\mathrm{PDSCH}}}{16}$ Be HS-PDSCH benchmark solid size road power, P _HS-PDSCHBe the maximum transmission power that HS-PDSCH allows, when α (n-1) is this user of last scheduled, the right power proportions of this UE shared pairing user, when not matching the user, α (n-1)=1, when sky divides between the user five equilibrium power,

When α (n) dispatches this user for this, the right power proportions of this UE shared pairing user, when not matching the user, α (n)=1, when sky divides between the user five equilibrium power,

Judging unit is used for determining that when β＞1 user switches to non-NULL by sky branch state and divides state; When β＜1, determine that the user divides state to switch to empty branch state by non-NULL; β=1 determines that the user empty branch state and non-NULL do not take place divide switching between the state.

Preferably, correcting module comprises:

The data block determining unit, when being used for determining that this dispatches this user, data block transmitted length is TBS next time _k(n)=(N _k(n)/N _k(n-1)) * TBS _k(n-1), wherein: this dispatches this user's N _k(n)=min{NodeB surplus resources (code channel), the UE maximum can be handled code channel number }, the UE maximum can be handled code channel number by the decision of UE ability level, this user's of last scheduled N _k(n-1)=min{NodeB surplus resources (code channel), the UE maximum can be handled code channel number }, the UE maximum can be handled code channel number and be determined by the UE ability level;

Amending unit is used for TBS _k(n) do following correction:

TBS _k(n)=(N _k(n)/N _k(n-1)) * (TBS _k(n-1)+and f (β)), wherein, f (β) is the MCS correction.

Preferably, amending unit is further used for according to user feedback RTBS, being made as TBS1=TBS when definite f (β) _k(n-1)), by inquiry signal to noise ratio and transmission TB block size form, obtain its corresponding SIR1; Calculate SIR2=SIR1+10 * log (β); By inquiry signal to noise ratio and transmission TB block size form, obtain the TBS2 of SIR2 correspondence; Determine f (β)=TBS2-TBS1.

Beneficial effect of the present invention is as follows:

In technical scheme provided by the invention, because when determining that the user empty minute state and non-NULL have taken place is divided switching between the state, just MCS is carried out correcting process, therefore can reduce or eliminate because the HS-PDSCH signal to noise ratio saltus step that the variation of empty branch situation causes, the terminal that causes is thus measured feedback CQI can not truly reflect channel condition problem at that time, thereby can further promote the systematic function under empty the branch.

Description of drawings

Fig. 1 is the MCS correcting process method implementing procedure schematic diagram in the space division system in the embodiment of the invention;

Fig. 2 is an architecture of base station schematic diagram in the embodiment of the invention.

Embodiment

The inventor notices in the invention process: after the HSDPA system introduces SDMA, each dispatching cycle, empty branch situation all might change, for example: the free user of branch and do not have variation between the empty user of branch, the empty variation that divides the user etc., saltus step takes place in the SIR that the user that the variation of empty branch situation can cause measures HS-PDSCH, thereby resource and MCS that the base station needs when directly using the CQI of feedback terminal last time to calculate this scheduling are inaccurate, not real reflection channel condition, and this will certainly influence systematic function.

When the user when sky branch state switches to non-NULL and divides state, if not carrying out MCS revises, the CQI that directly feeds back when being in empty branch state last time of this user then, carry out selection and the transmission of this MCS, then cause selecting TB (Transport Block probably, transmission block) piece is too small, and throughput reduces; When the user when non-NULL divides state to switch to empty branch state, if not carrying out MCS revises, the CQI that feeds back when then this user directly was in non-dummy status with reference to last time, carry out selection and the transmission of this MCS, then probably cause selecting the TB piece excessive, the first BLER of biography (BLock Error Rate, Block Error Rate) is raise, cause the increase of time delay and the reduction of throughput.

Based on this, MCS amendment scheme in a kind of HSDPA of being applied to space division system will have been proposed in embodiments of the present invention, in this scheme, will reduce or eliminate because of sky branch situation changes the terminal CQI feedback cause by the parameter setting as far as possible and fail really to reflect the inaccurate problem of channel condition.Below in conjunction with accompanying drawing the specific embodiment of the present invention is described.

Fig. 1 is the MCS correcting process method implementing procedure schematic diagram in the space division system, as shown in the figure, can comprise the steps: when carrying out correcting process

Step 101, determine whether the user empty minute state and non-NULL has been taken place divided switching between the state;

Step 102, when switching, MCS is carried out correcting process.

In the enforcement, when determining whether the user empty minute state and non-NULL have taken place divides switching between the state, can determine whether the user switching has taken place according to HS-PDSCH benchmark solid size road power and the right power proportions of user shared pairing user.

In the enforcement, determine that according to HS-PDSCH benchmark solid size road power and the right power proportions of user shared pairing user whether the user switching has taken place, and comprising:

Determine $\mathrm{\β}=\frac{P_{\mathrm{code}}\left(n\right)}{P_{\mathrm{code}}(n-1)},$ Wherein, P _Code(n-1)=α (n-1) * P _CodeDuring for this user of last scheduled, the transmitting power in this user's solid size road, P _Code(n)=α (n) * P _CodeWhen dispatching this user for this, the transmitting power in this user's solid size road, $P_{\mathrm{code}}=\frac{P_{\mathrm{HS}-\mathrm{PDSCH}}}{16}$ Be HS-PDSCH benchmark solid size road power, P _HS-PDSCHBe the maximum transmission power of HS-PDSCH permission, when α (n-1) is this user of last scheduled, this UE (UserEquipment, subscriber equipment) the right power proportions of shared pairing user, when not matching the user, α (n-1)=1, when sky divides between the user five equilibrium power

When α (n) dispatches this user for this, the right power proportions of this UE shared pairing user, when not matching the user, α (n)=1, when sky divides between the user five equilibrium power,

When β＞1, the user switches to non-NULL by sky branch state and divides state; When β＜1, the user divides state to switch to empty branch state by non-NULL; β=1, empty branch state and non-NULL do not take place and divide switching between the state in the user.

In concrete the enforcement, the data block length that terminal is fed back RTBS correspondence among the CQI is recorded as TBS _k(n-1), this value need be made correction to compensate the saltus step of the HS-DSCH SIR generation that causes because of existing of SDMA user.When the UE last scheduled is write down in the base station, the right power proportions α (n-1) of this UE shared pairing user, concrete, if do not match the user, α (n-1)=1 divides five equilibrium power situation between the user for sky,

If HS-PDSCH benchmark solid size road power is $P_{\mathrm{code}}=\frac{P_{\mathrm{HS}-\mathrm{PDSCH}}}{16},$ P _HS-PDSCHBe the maximum transmission power that HS-PDSCH allows, 16 is all BRU of time slot (Basic ResourceUnit, basic resources unit) number in the LCR TDD system.During according to this user of last scheduled, the right power proportions of this user shared pairing user, the transmitting power that obtains this user's solid size road is P _Code(n-1)=α (n-1) * P _Code, when this dispatched this user, same according to the right power proportions of this user shared pairing user, the transmitting power that obtains this user's solid size road was P _Code(n)=α (n) * P _Code

In the enforcement, MCS is carried out correcting process, can comprise:

When determining that this dispatches this user, data block transmitted length is TBS next time _k(n)=(N _k(n)/N _k(n-1)) * TBS _k(n-1), wherein: this dispatches this user's N _k(n)=min{NodeB surplus resources (code channel), the UE maximum can be handled code channel number }, the UE maximum can be handled code channel number by the decision of UE ability level, this user's of last scheduled N _k(n-1)=min{NodeB surplus resources (code channel), the UE maximum can be handled code channel number }, the UE maximum can be handled code channel number and be determined by the UE ability level;

To TBS _k(n) do following correction:

TBS _k(n)=(N _k(n)/N _k(n-1)) * (TBS _k(n-1)+and f (β)), wherein, f (β) is the MCS correction.

In concrete the enforcement, data block transmitted length T BS next time _k(n)=(N _k(n)/N _k(n-1)) * TBS _k(n-1), wherein:

N _k(n)=min{NodeB surplus resources (code channel), the UE maximum can be handled code channel number }, the UE maximum can be handled code channel number and be determined by the UE ability level.

Then to TBS _k(n) do following correction:

TBS _k(n)=(N _k(n)/N _k(n-1)) * (TBS _k(n-1)+and f (β)) formula (1)

Wherein, $\mathrm{\β}=\frac{P_{\mathrm{code}}\left(n\right)}{P_{\mathrm{code}}(n-1)}$ (wherein performance number is a linear value), β＞1 expression user switches to non-NULL by sky branch state and divides state, and β＜1 expression user divides state to switch to empty branch state by non-NULL, and empty branch state and non-NULL do not take place and divide switching between the state in β=1 expression user.β promptly can be used to detect the user and whether empty minute state and non-NULL have taken place divides switching between the state.

F (β) is the MCS correction, the HS-PDSCH signal to noise ratio saltus step of expression to changing and cause because of sky branch situation, thus the inaccurate of RTBS of the terminal that causes feedback revised.

In the enforcement, determine that f (β) can comprise:

According to user feedback RTBS, be made as TBS1=TBS _k(n-1)), by inquiry signal to noise ratio and transmission TB block size form, obtain its corresponding SIR1;

Calculate SIR2=SIR1+10 * log (β);

By inquiry signal to noise ratio and transmission TB block size form, obtain the TBS2 of SIR2 correspondence;

Determine f (β)=TBS2-TBS1.

In concrete the enforcement, the RTBS according to user feedback is made as TBS1=TBS _k(n-1)), TB block size form can and be transmitted by the inquiry signal to noise ratio in the base station, obtains its corresponding SIR1, calculates SIR2=SIR1+10 * log (β), looks into above table equally with the SIR2 that obtains and obtains corresponding TBS2, then order:

f(β)＝TBS2-TBS1

Just this sends to the block size TBS of UE can to obtain the base station according to formula (1) then _k(n), this block size information base station can be passed through HS-SCCH (High-Speed shared control channel, High-Speed Shared Control Channel) and informs UE.

Based on same inventive concept, a kind of base station also is provided in the embodiment of the invention, because the principle of dealing with problems in the base station is similar to the MCS correcting process method in the space division system, so the enforcement of base station can repeat part and repeat no more referring to the enforcement of method.

Fig. 2 is the architecture of base station schematic diagram, as shown in the figure, can comprise in the base station:

Switch determination module 201, be used for determining whether the user empty minute state and non-NULL has been taken place divided switching between the state;

Correcting module 202 is used for when switching, and MCS is carried out correcting process.

In the enforcement, switching determination module can also be further used for determining according to HS-PDSCH benchmark solid size road power and the right power proportions of user shared pairing user whether the user switching has taken place when determining whether the user empty minute state and non-NULL have taken place divides switching between the state.

In the enforcement, switching determination module can comprise:

Determining unit is used to determine $\mathrm{\β}=\frac{P_{\mathrm{code}}\left(n\right)}{P_{\mathrm{code}}(n-1)},$ Wherein, P _Code(n-1)=α (n-1) * P _CodeDuring for this user of last scheduled, the transmitting power in this user's solid size road, P _Code(n)=α (n) * P _CodeWhen dispatching this user for this, the transmitting power in this user's solid size road, $P_{\mathrm{code}}=\frac{P_{\mathrm{HS}-\mathrm{PDSCH}}}{16}$ Be HS-PDSCH benchmark solid size road power, P _HS-PDSCHBe the maximum transmission power that HS-PDSCH allows, when α (n-1) is this user of last scheduled, the right power proportions of this UE shared pairing user, when not matching the user, α (n-1)=1, when sky divides between the user five equilibrium power,

When α (n) dispatches this user for this, the right power proportions of this UE shared pairing user, when not matching the user, α (n)=1, when sky divides between the user five equilibrium power,

Judging unit is used for determining that when β＞1 user switches to non-NULL by sky branch state and divides state; When β＜1, determine that the user divides state to switch to empty branch state by non-NULL; β=1 determines that the user empty branch state and non-NULL do not take place divide switching between the state.

In the enforcement, correcting module can also comprise:

The data block determining unit, when being used for determining that this dispatches this user, data block transmitted length is TBS next time _k(n)=(N _k(n)/N _k(n-1)) * TBS _k(n-1), wherein: this dispatches this user's N _k(n)=min{NodeB surplus resources (code channel), the UE maximum can be handled code channel number }, the UE maximum can be handled code channel number by the decision of UE ability level, this user's of last scheduled N _k(n-1)=min{NodeB surplus resources (code channel), the UE maximum can be handled code channel number }, the UE maximum can be handled code channel number and be determined by the UE ability level;

Amending unit is used for TBS _k(n) do following correction:

TBS _k(n)=(N _k(n)/N _k(n-1)) * (TBS _k(n-1)+and f (β)), wherein, f (β) is the MCS correction.

In the enforcement, amending unit can also be further used for according to user feedback RTBS, being made as TBS1=TBS when definite f (β) _k(n-1)), by inquiry signal to noise ratio and transmission TB block size form, obtain its corresponding SIR1; Calculate SIR2=SIR1+10 * log (β); By inquiry signal to noise ratio and transmission TB block size form, obtain the TBS2 of SIR2 correspondence; Determine f (β)=TBS2-TBS1.

For the convenience of describing, the each several part of the above device is divided into various modules with function or the unit is described respectively.Certainly, when enforcement is of the present invention, can in same or a plurality of softwares or hardware, realize the function of each module or unit.

As seen from the above-described embodiment, the technical scheme that provides in the embodiment of the invention is carried out the empty user who divides of shared channel in to TDD HSDPA system MCS revises, reduced or eliminated because the HS-PDSCH signal to noise ratio saltus step that the variation of empty branch situation causes, the terminal that causes is thus measured feedback CQI can not truly reflect channel condition problem at that time, thereby can further promote the systematic function under empty the branch.

Those skilled in the art should understand that embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware embodiment, complete software implementation example or in conjunction with the form of the embodiment of software and hardware aspect.And the present invention can adopt the form that goes up the computer program of implementing in one or more computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) that wherein include computer usable program code.

The present invention is that reference is described according to the flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.

These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.

These computer program instructions also can be loaded on computer or other programmable data processing device, make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of carrying out on computer or other programmable devices is provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.

Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic creative notion of cicada, then can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.

Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims (10)

1. the modulation coding mode MCS correcting process method in the space division system is characterized in that, comprises the steps:

Determine whether the user empty minute state and non-NULL has been taken place divided switching between the state;

When switching, MCS is carried out correcting process.

2. the method for claim 1, it is characterized in that, when determining whether the user empty minute state and non-NULL have taken place divides switching between the state, determine according to high-speed downstream Physical Shared Channel HS-PDSCH benchmark solid size road power and the right power proportions of user shared pairing user whether the user switching has taken place.

3. method as claimed in claim 2 is characterized in that, determines that according to HS-PDSCH benchmark solid size road power and the right power proportions of user shared pairing user whether the user switching has taken place, and comprising:

Determine $\mathrm{\β}=\frac{P_{\mathrm{code}}\left(n\right)}{P_{\mathrm{code}}(n-1)},$ Wherein, P _Code(n-1)=α (n-1) * P _CodeDuring for this user of last scheduled, the transmitting power in this user's solid size road, P _Code(n)=α (n) * P _CodeWhen dispatching this user for this, the transmitting power in this user's solid size road, $P_{\mathrm{code}}=\frac{P_{\mathrm{HS}-\mathrm{PDSCH}}}{16}$ Be HS-PDSCH benchmark solid size road power, P _HS-PDSCHBe the maximum transmission power that HS-PDSCH allows, when α (n-1) is this user of last scheduled, the right power proportions of this user equipment (UE) shared pairing user, when not matching the user, α (n-1)=1, when sky divides between the user five equilibrium power,

When α (n) dispatches this user for this, the right power proportions of this UE shared pairing user, when not matching the user, α (n)=1, when sky divides between the user five equilibrium power,

When β＞1, determine that the user switches to non-NULL by sky branch state and divides state; When β＜1, determine that the user divides state to switch to empty branch state by non-NULL; β=1 determines that the user empty branch state and non-NULL do not take place divide switching between the state.

4. method as claimed in claim 3 is characterized in that, MCS is carried out correcting process, comprising:

When determining that this dispatches this user, data block transmitted length is TBS next time _k(n)=(N _k(n)/N _k(n-1)) * TBS _k(n-1), wherein: this dispatches this user's N _k(n)=min{NodeB surplus resources (code channel), the UE maximum can be handled code channel number }, the UE maximum can be handled code channel number by the decision of UE ability level, this user's of last scheduled N _k(n-1)=min{NodeB surplus resources (code channel), the UE maximum can be handled code channel number }, the UE maximum can be handled code channel number and be determined by the UE ability level;

Determine f (β);

To TBS _k(n) do following correction:

TBS _k(n)=(N _k(n)/N _k(n-1)) * (TBS _k(n-1)+and f (β)), wherein, f (β) is the MCS correction.

5. method as claimed in claim 4 is characterized in that, determines that f (β) comprising:

Transmission block size RTBS according to user feedback is recommended is made as TBS1=TBS _k(n-1)), by inquiry signal to noise ratio and transmission transmission block TB block size form, obtain its corresponding signal interference ratio SIR1;

Calculate SIR2=SIR1+10 * log (β);

By inquiry signal to noise ratio and transmission TB block size form, obtain the TBS2 of SIR2 correspondence;

Determine f (β)=TBS2-TBS1.

6. a base station is characterized in that, comprising:

Switch determination module, be used for determining whether the user empty minute state and non-NULL has been taken place divided switching between the state;

Correcting module is used for when switching, and MCS is carried out correcting process.

7. base station as claimed in claim 6, it is characterized in that, switching determination module is further used for determining according to HS-PDSCH benchmark solid size road power and the right power proportions of user shared pairing user whether the user switching has taken place when determining whether the user empty minute state and non-NULL have taken place divides switching between the state.

8. base station as claimed in claim 7 is characterized in that, switches determination module and comprises:

Determining unit is used to determine $\mathrm{\β}=\frac{P_{\mathrm{code}}\left(n\right)}{P_{\mathrm{code}}(n-1)},$ Wherein, P _Code(n-1)=α (n-1) * P _CodeDuring for this user of last scheduled, the transmitting power in this user's solid size road, P _Code(n)=α (n) * P _CodeWhen dispatching this user for this, the transmitting power in this user's solid size road, $P_{\mathrm{code}}=\frac{P_{\mathrm{HS}-\mathrm{PDSCH}}}{16}$ Be HS-PDSCH benchmark solid size road power, P _HS-PDSCHBe the maximum transmission power that HS-PDSCH allows, when α (n-1) is this user of last scheduled, the right power proportions of this UE shared pairing user, when not matching the user, α (n-1)=1, when sky divides between the user five equilibrium power,

When α (n) dispatches this user for this, the right power proportions of this UE shared pairing user, when not matching the user, α (n)=1, when sky divides between the user five equilibrium power,

Judging unit is used for determining that when β＞1 user switches to non-NULL by sky branch state and divides state; When β＜1, determine that the user divides state to switch to empty branch state by non-NULL; β=1 determines that the user empty branch state and non-NULL do not take place divide switching between the state.

9. base station as claimed in claim 8 is characterized in that correcting module comprises:

The data block determining unit, when being used for determining that this dispatches this user, data block transmitted length is TBS next time _k(n)=(N _k(n)/N _k(n-1)) * TBS _k(n-1), wherein: this dispatches this user's N _k(n)=min{NodeB surplus resources (code channel), the UE maximum can be handled code channel number }, the UE maximum can be handled code channel number by the decision of UE ability level, this user's of last scheduled N _k(n-1)=min{NodeB surplus resources (code channel), the UE maximum can be handled code channel number }, the UE maximum can be handled code channel number and be determined by the UE ability level;

Amending unit is used for TBS _k(n) do following correction:

TBS _k(n)=(N _k(n)/N _k(n-1)) * (TBS _k(n-1)+and f (β)), wherein, f (β) is the MCS correction.

10. base station as claimed in claim 9 is characterized in that, amending unit is further used for according to user feedback RTBS, being made as TBS1=TBS when definite f (β) _k(n-1)), by inquiry signal to noise ratio and transmission TB block size form, obtain its corresponding SIR1; Calculate SIR2=SIR1+10 * log (β); By inquiry signal to noise ratio and transmission TB block size form, obtain the TBS2 of SIR2 correspondence; Determine f (β)=TBS2-TBS1.

Images