CN102571288A - Method for determining channel performance and apparatus thereof - Google Patents

Abstract

The embodiment of the invention relates to the field of wireless communication technology, especially relating to a method for determining channel performance and an apparatus thereof which are used to solve problems that in the prior art a scheme of determining channel performance in an LTE system can not truly reflect interference suffered by a control domain in the LTE system and accuracy of determined channel performance is influenced. The method comprises the following steps: according to a transmission power value of each interference cell control domain, determining an equivalent parameter value corresponding to each interference cell; according to the equivalent parameter value corresponding to each interference cell and a service cell equivalence construction matrix corresponding to disturbed user equipment, determining an average signal to noise ratio of a sub-carrier; and according to the average noise ratio of the sub-carrier, determining a downlink pilot signal or control channel performance. According to the embodiment of the invention, the interference suffered by the control domain in the LTE system can be truly reflected, and the accuracy of the determined channel performance is raised.

Description

A kind of method and apparatus of definite channel performance

Technical field

The present invention relates to wireless communication technology field, particularly a kind of method and apparatus of definite channel performance.

Background technology

In LTE (Long Term Evolution, the Long Term Evolution) system emulation, different according to control channel and the suffered disturbed condition of Traffic Channel require both separately to carry out modeling on the principle.Therefore Traffic Channel is come that according to the PRB rank Traffic Channel is carried out modeling and is handled relatively directly perceived and convenient because the least resource unit of scheduling is PRB (Physical Resource Block, a Physical Resource Block).

The main flow process of present existing implementation has following step:

Step 1, employing LTE system simulation platform carry out conventional emulation, write down the UE (subscriber equipment) of each cell scheduling in each subframe;

Step 2, employing system simulation platform carry out emulation once more; Adopt the random seed identical with step 1; UE according to step 1 record dispatches; But the UE for scheduling does not analyze its service feature, but analyzes its PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel) performance;

Step 3, for the scheduling the user; Its PDCCH degree of polymerization grade is according to CQI (the Channel Quality Indicator of UE feedback; The channel quality indication) select, when dispatching this user it is distributed corresponding PDCCH resource, the PDCCH resource of distribution is the smallest particles degree with PRB;

The SNR of the PDCCH of step 4, calculating UE, and shine upon corresponding degree of polymerization link curve, obtain the performance of PDCCH.

Be different from Traffic Channel; Various control channels are down control channel especially; The Resource Unit that distributes is RE (Resource Element normally; Resource Unit) or the combination of RE (combination of RE comprises REG (Resource Element Group, resource unit group) or CCE (Control Channel Element, control channel unit)); But also control channel is not reached the modeling and simulating of RE precision grade at present, so taked simplification to a certain degree to handle usually for control channel in the LTE system emulation.

Prior LTE system is more for the simplification of down control channel modeling aspect about down control channel being carried out the definite channel performance of emulation appraisal procedure; Can not reflect the suffered interference of control domain in the LTE system truly; Become more meticulous degree not enough, influenced the accuracy of the channel performance of confirming.

In sum, confirm in the LTE system that at present the scheme of channel performance can not reflect the suffered interference of control domain in the LTE system truly, has influenced the accuracy of the channel performance of confirming.

Summary of the invention

The method and apparatus of a kind of definite channel performance that the embodiment of the invention provides; Can not reflect the suffered interference of control domain in the LTE system truly in order to solve the scheme of confirming channel performance in the LTE system that exists in the prior art, influence the problem of the accuracy of the channel performance of confirming.

The method of a kind of definite channel performance that the embodiment of the invention provides comprises:

According to the transmission power level of each interfered cell control domain, confirm the equivalent parameters value that each interfered cell is corresponding;

According to the equivalent parameters value of each interfered cell correspondence with by the corresponding Serving cell equivalent constructions matrix of interference user equipment, confirm the average signal-to-noise ratio of subcarrier;

According to the average signal-to-noise ratio of subcarrier, confirm the performance of down-bound pilot frequency signal or control channel.

The equipment of a kind of definite channel performance that the embodiment of the invention provides comprises:

The parameter value determination module is used for the transmission power level according to each interfered cell control domain, confirms the equivalent parameters value that each interfered cell is corresponding;

The signal to noise ratio determination module is used for confirming the average signal-to-noise ratio of subcarrier according to the equivalent parameters value of each interfered cell correspondence with by the corresponding Serving cell equivalent constructions matrix of interference user equipment;

The performance determination module is used for the average signal-to-noise ratio according to subcarrier, confirms the performance of down-bound pilot frequency signal or control channel.

Because according to the equivalent parameters value of each interfered cell correspondence with by the corresponding Serving cell equivalent constructions matrix of interference user equipment; Confirm the average signal-to-noise ratio of subcarrier; Thereby can reflect the suffered interference of control domain in the LTE system truly, improve the accuracy of the channel performance of confirming.

Description of drawings

Fig. 1 confirms the method flow sketch map of channel performance for the embodiment of the invention;

Fig. 2 confirms the device structure sketch map of channel performance for the embodiment of the invention;

Fig. 3 confirms the method flow sketch map of PDCCH performance for the embodiment of the invention.

Embodiment

The embodiment of the invention is according to the equivalent parameters value of each interfered cell correspondence with by the corresponding Serving cell equivalent constructions matrix of interference user equipment; Confirm the average signal-to-noise ratio of subcarrier; According to the average signal-to-noise ratio of subcarrier, confirm the performance of down-bound pilot frequency signal or control channel.Because according to the equivalent parameters value of each interfered cell correspondence with by the corresponding Serving cell equivalent constructions matrix of interference user equipment; Confirm the average signal-to-noise ratio of subcarrier; Thereby can reflect the suffered interference of control domain in the LTE system truly, improve the accuracy of the channel performance of confirming.

In force, the scheme of the embodiment of the invention can be applied to TD-LTE (Time Division-Synchronous Code Division Multiple Access Long Term Evolution, TD SDMA Long Term Evolution) system.

Below in conjunction with Figure of description the embodiment of the invention is described in further detail.

As shown in Figure 1, the embodiment of the invention confirms that the method for channel performance comprises the following steps:

Step 101, according to the transmission power level of each interfered cell control domain, confirm the equivalent parameters value that each interfered cell is corresponding;

Step 102, according to the corresponding equivalent parameters value of each interfered cell with by the corresponding Serving cell equivalent constructions matrix of interference user equipment, confirm the average signal-to-noise ratio of subcarrier;

Step 103, according to the average signal-to-noise ratio of subcarrier, confirm the performance of down-bound pilot frequency signal or control channel.

Wherein, the control channel of the embodiment of the invention includes but not limited to following part or all of channel:

PDCCH (Physical Downlink Control Channel; Physical Downlink Control Channel), PHICH (Physical HARQ Indication Channel; The automatic request retransmission indicating channel of physical mixed) and PCFICH (Physical Control Format Indication Channel, Physical Control Format Indicator Channel);

The control channel down-bound pilot frequency signal comprises:

CRS (Cell-specific reference signals, the exclusive pilot signal in sub-district).

Preferably, confirm the transmission power level of each interfered cell control domain according to the following step:

According to the probability of interference of down-bound pilot frequency signal and each control channel, confirm the transmission power level of each interfered cell control domain.

Preferably, confirm the transmission power level of interfered cell control domain according to formula one:

${\mathrm{Tx}}_i=\underset{u=0}{\overset{m-1}{\mathrm{\Σ}}}(\frac{n_u*{\mathrm{Tx}}_{\mathrm{RE}\_u\_\mathrm{PDCCH}}}{M_{\mathrm{RE}\_\mathrm{celli}\_\mathrm{PDCCH}}}*\frac{M_{i0\_\mathrm{PDCCH}}}{M_{\mathrm{RE}\_\mathrm{cell}0\_\mathrm{PDCCH}}})+{\mathrm{Tx}}_{\mathrm{RE}\_i\_\mathrm{CRS}}*{\mathrm{\α}}_{\mathrm{Interi}\_\mathrm{CRS}}$

$+{\mathrm{Tx}}_{\mathrm{RE}\_i\_\mathrm{PCFICH}}*{\mathrm{\α}}_{\mathrm{Interi}\_\mathrm{PCFICH}}+{\mathrm{Tx}}_{\mathrm{RE}\_i\_\mathrm{PHICH}}*{\mathrm{\α}}_{\mathrm{Interi}\_\mathrm{PHICH}}$ ... .. formula one;

Wherein, Tx _iThe transmission power level of expression interfered cell control domain; n _uExpression interfered cell Cell _iThe RE number of the PDCCH Resource Unit of u user equipment allocation of scheduling; Tx _{RE_u_PDCCH}Expression interfered cell Cell _iEach RE transmission power level of the PDCCH of u subscriber equipment; Tx _{RE_i_CRS}Expression interfered cell Cell _iEach RE transmission power level of CRS; Tx _{RE_i_PCFICH}Expression interfered cell Cell _iEach RE transmission power level of PCFICH; Tx _{RE_i_PHICH}Expression interfered cell Cell _iEach RE transmission power level of PHICH; M _{I0_PDCCH}Expression interfered cell Cell _iWith by interfered cell Cell ₀RE number with PDCCH frequently; MR _{E_cell0_PDCCH}Expression is by interfered cell Cell ₀The total RE number of PDCCH; M _{RE_celli_PDCCH}Expression interfered cell Cell _iThe total RE number of PDCCH; α _{Interi_CRS}The expression subscriber equipment sub-district Cell that is interfered _iThe probability of interference of middle CRS; α _{Interi_PCFICH}The expression subscriber equipment sub-district Cell that is interfered _iThe probability of interference of middle PCFICH; α _{Interi_PHICH}The expression subscriber equipment sub-district Cell that is interfered _iThe probability of interference of middle PHICH.

Be that PDCCH is an example derivation PDCCH interference calculation formula with interference source below.

Suppose that by interference user equipment be UE ₀, UE ₀Serving cell (being home cell) be Cell ₀, need to calculate UE ₀Receive other sub-districts Cell _iThe interference of (i＞0).For UE ₀The PDCCH resource of distributing, same asset locational down channel in adjacent area possibly be PDCCH, CRS, PCFICH or PHICH, when therefore calculating the signal to noise ratio of PDCCH, the influence of several kinds of down channels more than needing to consider:

For interfered cell Cell _i, UE ₀Be interfered total interference of sub-district of PDCCH be:

I _i＝Rx _{RE_Interi_PDCCH}*M _{RE_Interi_PDCCH}+Rx _{RE_Interi_CRS}*M _{RE_Interi_CRS}

+ Rx _{RE_Interi_PCFICH}* M _{RE_Interi_PCFICH}+ Rx _{RE_Interi_PHICH}* M _{RE_Interi_PHICH}... .. formula two;

Wherein, Rx _{RE_Interi_PDCCH}Expression UE ₀The PDCCH sub-district Cell that is interfered _iThe interference of middle each RE of PDCCH; M _{RE_Interi_PDCCH}Expression UE ₀PDCCH by interfered cell Cell _iThe RE number that middle PDCCH disturbs; Rx _{RE_Interi_CRS}Expression UE ₀Sub-district Cell is interfered _iEach RE of middle CRS disturbs; M _{RE_Interi_CRS}Expression UE ₀PDCCH by interfered cell Cell _iThe RE number that middle CRS disturbs; Rx _{RE_Interi_PCFICH}Expression UE ₀Sub-district Cell is interfered _iEach RE of middle PCFICH disturbs; M _{RE_Interi_PCFICH}Expression UE ₀PDCCH by interfered cell Cell _iThe RE number that middle PCFICH disturbs; Rx _{RE_Interi_PHICH}Expression UE ₀Sub-district Cell is interfered _iEach RE of middle PHICH disturbs; M _{RE_Interi_PHICH}Expression UE ₀PDCCH by interfered cell Cell _iThe RE number that middle PHICH disturbs.

UE ₀PDCCH receive gross power and be:

C=Rx _{RE_UE0_PDCCH}* M _{RE_UE0_PDCCH}... .. formula three;

Wherein, Rx _{RE_UE0_PDCCH}Expression UE ₀Receive local area Cell ₀Each RE signal power of PDCCH; M _{RE_UE0_PDCCH}Expression local area Cell ₀Be UE ₀The PDCCH number of resources of distributing.

So UE ₀The PDCCH signal to noise ratio be:

$\mathrm{SINR}=\frac{C}{\left(\underset{i}{\mathrm{\Σ}}{I}_i\right)+N}$

$=\frac{{\mathrm{Rx}}_{\mathrm{RE}\_\mathrm{UE}0\_\mathrm{PDCCH}}*M_{\mathrm{RE}\_\mathrm{UE}0\_\mathrm{PDCCH}}}{\left(\underset{i}{\mathrm{\Σ}}\left(\begin{array}{c}{\mathrm{Rx}}_{\mathrm{RE}\_\mathrm{Interi}\_\mathrm{PDCCH}}*M_{\mathrm{RE}\_\mathrm{Interi}\_\mathrm{PDCCH}}+{\mathrm{Rx}}_{\mathrm{RE}\_\mathrm{Interi}\_\mathrm{CRS}}*M_{\mathrm{RE}\_\mathrm{Interi}\_\mathrm{CRS}}\\ +{\mathrm{Rx}}_{\mathrm{RE}\_\mathrm{Interi}\_\mathrm{PCFICH}}*M_{\mathrm{RE}\_\mathrm{Interi}\_\mathrm{PCFICH}}+{\mathrm{Rx}}_{\mathrm{RE}\_\mathrm{Interi}\_\mathrm{PHICH}}*M_{\mathrm{RE}\_\mathrm{Interi}\_\mathrm{PHICH}}\end{array}\right)\right)+N_{0\_\mathrm{RE}}*M_{\mathrm{RE}\_\mathrm{UE}0\_\mathrm{PDCCH}}}$

$=\frac{{\mathrm{Rx}}_{\mathrm{RE}\_\mathrm{UE}0\_\mathrm{PDCCH}}}{\left(\underset{i}{\mathrm{\Σ}}\left(\begin{array}{c}{\mathrm{Rx}}_{\mathrm{RE}\_\mathrm{Interi}\_\mathrm{PDCCH}}*\frac{M_{\mathrm{RE}\_\mathrm{Interi}\_\mathrm{PDCCH}}}{M_{\mathrm{RE}\_\mathrm{UE}0\_\mathrm{PDCCH}}}+{\mathrm{Rx}}_{\mathrm{RE}\_\mathrm{Interi}\_\mathrm{CRS}}*\frac{M_{\mathrm{RE}\_\mathrm{Interi}\_\mathrm{CRS}}}{M_{\mathrm{RE}\_\mathrm{UE}0\_\mathrm{PDCCH}}}\\ +{\mathrm{Rx}}_{\mathrm{RE}\_\mathrm{Interi}\_\mathrm{PCFICH}}*\frac{M_{\mathrm{RE}\_\mathrm{Interi}\_\mathrm{PCFICH}}}{M_{\mathrm{RE}\_\mathrm{UE}0\_\mathrm{PDCCH}}}+{\mathrm{Rx}}_{\mathrm{RE}\_\mathrm{Interi}\_\mathrm{PHICH}}*\frac{M_{\mathrm{RE}\_\mathrm{Interi}\_\mathrm{PHICH}}}{M_{\mathrm{RE}\_\mathrm{UE}0\_\mathrm{PDCCH}}}\end{array}\right)\right)+N_{0\_\mathrm{RE}}}$

$=\frac{{\mathrm{Rx}}_{\mathrm{RE}\_\mathrm{UE}0\_\mathrm{PDCCH}}}{\left(\underset{i}{\mathrm{\Σ}}\left(\begin{array}{c}{\mathrm{Rx}}_{\mathrm{RE}\_\mathrm{Interi}\_\mathrm{PDCCH}}*{\mathrm{\α}}_{\mathrm{Interi}\_\mathrm{PDCCH}}+{\mathrm{Rx}}_{\mathrm{RE}\_\mathrm{Interi}\_\mathrm{CRS}}*{\mathrm{\α}}_{\mathrm{Interi}\_\mathrm{CRS}}\\ +{\mathrm{Rx}}_{\mathrm{RE}\_\mathrm{Interi}\_\mathrm{PCFICH}}*{\mathrm{\α}}_{\mathrm{Interi}\_\mathrm{PCFICH}}+{\mathrm{Rx}}_{\mathrm{RE}\_\mathrm{Interi}\_\mathrm{PHICH}}*{\mathrm{\α}}_{\mathrm{Interi}\_\mathrm{PHICH}}\end{array}\right)\right)+N_{0\_\mathrm{RE}}}$

$=\frac{{\mathrm{Rx}}_{\mathrm{RE}\_\mathrm{UE}0\_\mathrm{PDCCH}}}{I_{\mathrm{RE}}+N_{0\_\mathrm{RE}}}$ Formula four;

Wherein, N representes that the sub-district is that UE distributes the noise sum on the PDCCH number of resources;

Expression UE ₀Sub-district Cell is interfered _iThe probability of interference of middle PDCCH;

Expression UE ₀Sub-district Cell is interfered _iThe probability of interference of middle CRS;

Expression UE ₀Sub-district Cell is interfered _iThe probability of interference of middle PCFICH;

Expression UE ₀Sub-district Cell is interfered _iThe probability of interference of middle PHICH;

I _REEach RE of all interfered cells of receiving of expression disturb with; N _{0_RE}Represent the white Gaussian noise on each RE.

Since PDCCH information on the RE of PDCCH Resource Unit by being broken up, so interfered cell with by the PDCCH of interference user be with the unit number of frequency:

$M_{\mathrm{RE}\_\mathrm{Interi}\_\mathrm{PDCCH}}=M_{i0\_\mathrm{PDCCH}}*\frac{M_{\mathrm{RE}\_\mathrm{Celli}\_\mathrm{PDCCH}\_\mathrm{Use}}}{M_{\mathrm{RE}\_\mathrm{Celli}\_\mathrm{PDCCH}}}*\frac{M_{\mathrm{RE}\_\mathrm{UE}0\_\mathrm{PDCCH}}}{M_{\mathrm{RE}\_\mathrm{Cell}0\_\mathrm{PDCCH}}}$ ... .... formula five;

Wherein, M _{I0_PDCCH}Expression interfered cell Cell _iWith by interfered cell Cell ₀With PDCCH RE number frequently; M _{RE_celli_PDCCH_use}The RE number of the PDCCH that the expression interfered cell is assigned with; M _{RE_celli_PDCCH}The total RE number of expression interfered cell PDCCH; M _{RE_cell0_PDCCH}Expression is by interfered cell Cell ₀The total RE number of PDCCH.

With formula six substitution interfered cell Cell _iThe computing formula of PDCCH probability of interference, can obtain:

${\mathrm{\α}}_{\mathrm{Interi}\_\mathrm{PDCCH}}=\frac{M_{\mathrm{RE}\_\mathrm{Interi}\_\mathrm{PHICH}}}{M_{\mathrm{RE}\_\mathrm{UE}0\_\mathrm{PDCCH}}}=\frac{M_{\mathrm{RE}\_\mathrm{Celli}\_\mathrm{PDCCH}\_\mathrm{Use}}}{M_{\mathrm{RE}\_\mathrm{Celli}\_\mathrm{PDCCH}}}*\frac{M_{i0\_\mathrm{PDCCH}}}{M_{\mathrm{RE}\_\mathrm{Cell}0\_\mathrm{PDCCH}}}$ ... .... formula six;

In like manner, can obtain the probability of interference of interfered cell CRS, PCFICH, PHICH channel:

${\mathrm{\α}}_{\mathrm{Interi}\_\mathrm{CRS}}=\frac{M_{\mathrm{RE}\_\mathrm{Interi}\_\mathrm{CRS}}}{M_{\mathrm{RE}\_\mathrm{UE}0\_\mathrm{PDCCH}}}=\frac{M_{i0\_\mathrm{CRS}}}{M_{\mathrm{RE}\_\mathrm{Cell}0\_\mathrm{PDCCH}}}$ ... .... formula seven;

${\mathrm{\α}}_{\mathrm{Interi}\_\mathrm{PCFICH}}=\frac{M_{\mathrm{RE}\_\mathrm{Interi}\_\mathrm{PCFICH}}}{M_{\mathrm{RE}\_\mathrm{UE}0\_\mathrm{PDCCH}}}=\frac{M_{i0\_\mathrm{PCFICH}}}{M_{\mathrm{RE}\_\mathrm{Cell}0\_\mathrm{PDCCH}}}$ ... .... formula eight;

${\mathrm{\α}}_{\mathrm{Interi}\_\mathrm{PHICH}}=\frac{M_{\mathrm{RE}\_\mathrm{Interi}\_\mathrm{PHICH}}}{M_{\mathrm{RE}\_\mathrm{UE}0\_\mathrm{PDCCH}}}=\frac{M_{i0\_\mathrm{PHICH}}}{M_{\mathrm{RE}\_\mathrm{Cell}0\_\mathrm{PDCCH}}}$ ... .... formula nine;

Wherein, M _{I0_CRS}The expression with by interfered cell Cell ₀The PDCCH resource with frequently and interfered cell Cell _iRE number for CRS; M _{I0_PCFICH}The expression with by interfered cell Cell ₀The PDCCH resource with frequently and interfered cell Cell _iRE number for PCFICH; M _{I0_PHICH}The expression with by interfered cell Cell ₀The PDCCH resource with frequently and interfered cell Cell _iRE number for PCFICH.

It more than is the derivation of PDCCH interference calculation; For other down channel; Like CRS, PCFICH and PHICH channel; Derivation is approximate, in the denominator with formula six～formula nine when distinctive points only is to calculate probability of interference, is changed into the RE number of respective channel by the number of resources of the PDCCH of interfered cell; The PDCCH received power of molecule in the formula three is replaced with the received power of respective channel.

That is: confirm the probability of interference of PDCCH according to formula ten:

... .. formula ten;

Confirm the probability of interference of PHICH, PCFICH and CRS according to formula 11:

... .. formula 11;

Confirm the probability of interference of PCFICH according to formula 12:

... .. formula 12;

Confirm the probability of interference of CRS according to formula 13:

... .. formula 13;

Wherein, α _{Interi_PDCCH}The expression subscriber equipment sub-district Cell that is interfered _iThe probability of interference of middle PDCCH; α _{Interi_CRS}The expression subscriber equipment sub-district Cell that is interfered _iThe probability of interference of middle CRS; α _{Interi_PCFICH}The expression subscriber equipment sub-district Cell that is interfered _iThe probability of interference of middle PCFICH; α _{Interi_PHICH}The expression subscriber equipment sub-district Cell that is interfered _iThe probability of interference of middle PHICH; M _{I0_PDCCH}Expression interfered cell Cell _iWith by interfered cell Cell ₀RE number with PDCCH frequently; M _{RE_celli_PDCCH_use}The RE number of the PDCCH that the expression interfered cell is assigned with; M _{The RE_celli_ interference source}Expression interfered cell Cell _iThe total RE number of interference source; M _{The RE_cell0_ interference source}Expression interfered cell Cell ₀The total RE number of interference source; M _{I0_CRS}Expression interfered cell Cell _iWith by interfered cell Cell ₀RE number with CRS frequently; M _{I0_PCFICH}Expression interfered cell Cell _iWith by interfered cell Cell ₀RE number with PCFICH frequently; M _{I0_PHICH}Expression interfered cell Cell _iWith by interfered cell Cell ₀RE number with PHICH frequently.

In force, the interference source of the embodiment of the invention includes but not limited in following:

PDCCH, PHICH, PCFICH and CRS.

Preferably; In the step 101; To an interfered cell, if this interfered cell is in by the strong jamming cell list of interference user equipment, with the transmission power level of this interfered cell control domain divided by by the link load of interference user equipment to this interfered cell; Obtain equivalent interference value, and with the equivalent parameters value of equivalent interference value as this interfered cell correspondence;

To an interfered cell; If this interfered cell is in by the strong jamming cell list of interference user equipment; The transmission power level of this interfered cell control domain multiply by by interference user equipment channel matrix that should interfered cell; Obtain interfered cell equivalent constructions matrix, and with the equivalent parameters value of interfered cell equivalent constructions matrix as this interfered cell correspondence.

Concrete, to an interfered cell, if this interfered cell not in by the strong jamming cell list of interference user equipment, is then confirmed equivalent interference value based on formula 14:

$I_i=\frac{{\mathrm{Tx}}_i}{L_i}$ ... .. formula 14;

Wherein, I _iRepresent equivalent interference value; Tx _iThe transmission power level of expression interfered cell control domain; L _iExpression is by the interference user equipment UE ₀To interfered cell Cell _iLink load.

To an interfered cell, if this interfered cell in by the strong jamming cell list of interference user equipment, is then confirmed equivalent interference value based on formula 15:

H _Effi=Tx _i* H _i... .. formula 15;

Wherein, H _EffiExpression interfered cell equivalent constructions matrix; Tx _iThe transmission power level of expression interfered cell control domain; H _iExpression by interference user equipment to channel matrix that should interfered cell, in force, can be to by interference user UE ₀To interfered cell Cell _iChannel carry out modeling, the structure channel matrix H _i

Preferably, confirm Serving cell equivalent constructions matrix according to formula 16:

H _Eff0=Tx _{The RE_UE0_ interference source}* H ₀... .. formula 16;

Wherein, H _Eff0Expression is by the corresponding Serving cell equivalent constructions matrix of interference user equipment; Tx _{The RE_UE0_ interference source}Expression Serving cell Cell ₀The transmitting power of middle interference source; H ₀Expression is by the interference user equipment UE ₀To Serving cell Cell ₀Channel matrix.

In force, the interference signal that UE receives other all sub-districts except that the service sub-district sorts, and selects the top n sub-district and forms strong jamming cell list (N can set as required, N＜all number of cells).

Preferably, in the step 102, carry out input, obtain the signal to noise ratio of each number of sub-carrier according to the equivalent parameters value of each interfered cell correspondence on each number of sub-carrier with by the corresponding Serving cell equivalent constructions matrix of interference user equipment; The signal to noise ratio summation of each number of sub-carrier is made even all, obtain the average signal-to-noise ratio of subcarrier.

Concrete; Carry out input according to the equivalent parameters value of each interfered cell correspondence on each number of sub-carrier with by the corresponding Serving cell equivalent constructions matrix of interference user equipment; Through input, the received power that can calculate is the received power Rx of each RE _{RE_UE0_PDCCH}, and each RE of all interfered cells that received by interference user equipment disturb with each RE on white Gaussian noise, confirm the signal to noise ratio of subcarrier k then according to formula 17, and confirm the average signal-to-noise ratio of subcarriers according to formula 18:

${\mathrm{SNR}}_k=\frac{{\mathrm{Rx}}_{\mathrm{RE}\_\mathrm{UE}0\_\mathrm{PDCCH}}}{I_{\mathrm{RE}}+N_{0\_\mathrm{RE}}}$ ... .. formula 17;

Wherein, SNR _kThe signal to noise ratio of expression subcarrier k; Rx _{RE_UE0_PDCCH}The received power value of representing each RE; I _REEach RE of all interfered cells of receiving of expression disturb with; N _{0_RE}Represent the white Gaussian noise on each RE.

Obtain the signal to noise ratio snr of C number of sub-carrier _k(k=0,1 ..., C-1), it is asked average acquisition signal to noise ratio:

$\mathrm{SNR}=\frac{\underset{k=0}{\overset{C-1}{\mathrm{\Σ}}}{\mathrm{SNR}}_k}{C}$ ... .. formula 18.

Wherein, SNR representes the average signal-to-noise ratio of subcarrier; SNR _kThe signal to noise ratio of expression subcarrier k; C representes the quantity of subcarrier.

Preferably, in the step 103,, thereby obtain the link performance of down-bound pilot frequency signal or control channel according to the link curve of the average signal-to-noise ratio of subcarrier mapping SNR～BLER.

Which kind of interference source of above-mentioned employing just obtains the link corresponding performance at last.Such as interference source is PDCCH, then obtains the link performance of PDCCH.

Wherein, the executive agent of the embodiment of the invention can be a subscriber equipment, also can be network equipment.Network equipment can be base station (such as macro base station, a Home eNodeB etc.), also can be RN (relaying) equipment, can also be other network equipment.

Based on same inventive concept; A kind of equipment of definite channel performance also is provided in the embodiment of the invention; Because the principle that this equipment is dealt with problems confirms that with the embodiment of the invention method of channel performance is similar, so the enforcement of this equipment can repeat part and repeat no more referring to the enforcement of method.

As shown in Figure 2, the embodiment of the invention confirms that the equipment of channel performance comprises: parameter value determination module 20, signal to noise ratio determination module 21 and performance determination module 22.

Parameter value determination module 20 is used for the transmission power level according to each interfered cell control domain, confirms the equivalent parameters value that each interfered cell is corresponding;

Signal to noise ratio determination module 21 is used for confirming the average signal-to-noise ratio of subcarrier according to the equivalent parameters value of each interfered cell correspondence with by the corresponding Serving cell equivalent constructions matrix of interference user equipment;

Performance determination module 22 is used for the average signal-to-noise ratio according to subcarrier, confirms the performance of down-bound pilot frequency signal or control channel.

Preferably, control channel comprises following part or all of channel:

PDCCH, PHICH and PCFICH;

The control channel down-bound pilot frequency signal comprises:

CRS。

Preferably, parameter value determination module 20 is confirmed the transmission power level of each interfered cell control domain according to the following step:

According to the probability of interference of down-bound pilot frequency signal and each control channel, confirm the transmission power level of each interfered cell control domain.

Preferably, parameter value determination module 20 is confirmed the transmission power level of interfered cell control domain according to formula one.

Preferably, parameter value determination module 20 is confirmed the probability of interference of PDCCH according to formula ten; Confirm the probability of interference of PHICH according to formula 11; Confirm the probability of interference of PCFICH according to formula 12; Confirm the probability of interference of CRS according to formula 13.

Preferably; To an interfered cell; If this interfered cell is not in by the strong jamming cell list of interference user equipment; Parameter value determination module 20 divided by by the link load of interference user equipment to this interfered cell, obtains equivalent interference value with the transmission power level of this interfered cell control domain, and with equivalent interference value as the corresponding equivalent parameters value of this interfered cell.

Preferably; To an interfered cell; If this interfered cell is in by the strong jamming cell list of interference user equipment; Parameter value determination module 20 multiply by by interference user equipment the transmission power level of this interfered cell control domain to channel matrix that should interfered cell, obtains interfered cell equivalent constructions matrix, and with interfered cell equivalent constructions matrix as the corresponding equivalent parameters value of this interfered cell.

Preferably, signal to noise ratio determination module 21 is confirmed Serving cell equivalent constructions matrix according to formula 16.

Preferably, interference source is in following:

PDCCH, PHICH, PCFICH and CRS.

Preferably, signal to noise ratio determination module 21 carries out input according to the equivalent parameters value of each interfered cell correspondence on each number of sub-carrier with by the corresponding Serving cell equivalent constructions matrix of interference user equipment, obtains the signal to noise ratio of each number of sub-carrier; The signal to noise ratio summation of each number of sub-carrier is made even all, obtain the average signal-to-noise ratio of subcarrier.

Be that example describes the present invention program below with PDCCH.

As shown in Figure 3, the embodiment of the invention confirms that the method for PDCCH performance comprises the following steps:

Step 301, for UE ₀The tabulation of all inter-frequency interference cells in interfered cell Cell _i, statistics M _{RE_cell0_PDCCH}, M _{RE_celli_PDCCH}, M _{I0_PDCCH}, M _{I0_CRS}, M _{I0_PCFICH}, M _{I0_PHICH}

Step 302, suppose interfered cell Cell _iDispatch m user, calculate interfered cell Cell _iThe transmitting power Tx of control domain _i:

${\mathrm{Tx}}_i=\underset{u=0}{\overset{m-1}{\mathrm{\Σ}}}(\frac{n_u*{\mathrm{Tx}}_{\mathrm{RE}\_u\_\mathrm{PDCCH}}}{M_{\mathrm{RE}\_\mathrm{celli}\_\mathrm{PDCCH}}}*\frac{M_{i0\_\mathrm{PDCCH}}}{M_{\mathrm{RE}\_\mathrm{cell}0\_\mathrm{PDCCH}}})+{\mathrm{Tx}}_{\mathrm{RE}\_i\_\mathrm{CRS}}*{\mathrm{\α}}_{\mathrm{Interi}\_\mathrm{CRS}}$

$+{\mathrm{Tx}}_{\mathrm{RE}\_i\_\mathrm{PCFICH}}*{\mathrm{\α}}_{\mathrm{Interi}\_\mathrm{PCFICH}}+{\mathrm{Tx}}_{\mathrm{RE}\_i\_\mathrm{PHICH}}*{\mathrm{\α}}_{\mathrm{Interi}\_\mathrm{PHICH}};$

Wherein, n _uExpression interfered cell Cell _iThe PDCCH Resource Unit RE number that u user of scheduling distributes; Tx _{RE_u_PDCCH}Expression interfered cell Cell _iEach RE transmitting power of u user's PDCCH; Tx _{RE_i_CRS}Expression interfered cell Cell _iEach RE transmitting power of CRS; Tx _{RE_i_PCFICH}Expression interfered cell Cell _iEach RE transmitting power of PCFICH; Tx _{RE_i_PHICH}Expression interfered cell Cell _iEach RE transmitting power of PHICH.

Step 303, judgement interfered cell Cell _iWhether at UE ₀The strong jamming cell list in, if then execution in step 304; Otherwise execution in step 305.

Step 304, to by interference user UE ₀To interfered cell Cell _iChannel carry out modeling, the structure channel matrix H _i, according to the transmitting power Tx of interfered cell _i, calculate the equivalent constructions matrix H _Effi, and execution in step 306:

H _effi＝Tx _i*H _i。

I is disturbed in step 305, calculating equivalence _i, and execution in step 306:

$I_i=\frac{{\mathrm{Tx}}_i}{L_i};$

Wherein, L _iExpression is by interference user UE ₀To interfered cell Cell _iLink load.

Step 306, judgement interfered cell Cell _iWhether be UE ₀The tabulation of all inter-frequency interference cells in last, if then execution in step 307; Otherwise, return step 302.

Step 307, structure are by interference user UE ₀To this sub-district Cell ₀Channel matrix H ₀, according to this sub-district Cell ₀The transmitting power Tx of PDCCH _{RE_UE0_PDCCH}, calculate the equivalent constructions matrix H _Eff0:

H _eff0＝Tx _{RE_UE0_PDCCH}*H ₀。

Step 308, carry out input according to the matrix of structure, through input, the received power that can calculate is the received power Rx of each RE _{RE_UE0_PDCCH}, and UE ₀Each RE of all interfered cells that receive disturbs and I _RE, calculate the signal to noise ratio of subcarrier k thus:

${\mathrm{SNR}}_k=\frac{{\mathrm{Rx}}_{\mathrm{RE}\_\mathrm{UE}0\_\mathrm{PDCCH}}}{I_{\mathrm{RE}}+N_{0\_\mathrm{RE}}}.$

Step 309, to each subcarrier, repeated execution of steps 301～step 308.

The signal to noise ratio snr of step 310, acquisition C number of sub-carrier _k(k=0,1 ..., C-1), it is asked the average signal-to-noise ratio of average acquisition subcarrier:

$\mathrm{SNR}=\frac{\underset{k=0}{\overset{C-1}{\mathrm{\Σ}}}{\mathrm{SNR}}_k}{C}.$

Step 311, according to the link curve of user's signal to noise ratio snr mapping SNR～BLER, obtain the link performance of PDCCH.

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 the form of the embodiment of complete hardware embodiment, complete software implementation example or combination software and hardware aspect.And the present invention can be employed in the form that 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 go up the computer program of implementing.

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 through 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 ability 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 on computer or other programmable devices, carrying out 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 inventive concept could of cicada, then can make other change and modification to these embodiment.So accompanying claims is intended to be interpreted as all changes and the modification that comprises 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, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.

Claims (18)

1. the method for a definite channel performance is characterized in that, this method comprises:

According to the transmission power level of each interfered cell control domain, confirm the equivalent parameters value that each interfered cell is corresponding;

According to the equivalent parameters value of each interfered cell correspondence with by the corresponding Serving cell equivalent constructions matrix of interference user equipment, confirm the average signal-to-noise ratio of subcarrier;

According to the average signal-to-noise ratio of subcarrier, confirm the performance of down-bound pilot frequency signal or control channel.

2. the method for claim 1 is characterized in that, said control channel comprises following part or all of channel:

Physical downlink control channel PDCCH, physical mixed automatic request retransmission indicating channel PHICH and Physical Control Format Indicator Channel PCFICH;

Said control channel down-bound pilot frequency signal comprises:

The exclusive pilot signal CRS in sub-district.

3. method as claimed in claim 2 is characterized in that, confirms the transmission power level of each interfered cell control domain according to the following step:

According to the probability of interference of down-bound pilot frequency signal and each control channel, confirm the transmission power level of each interfered cell control domain.

4. method as claimed in claim 3 is characterized in that, confirms the transmission power level of interfered cell control domain according to formula:

${\mathrm{Tx}}_i=\underset{u=0}{\overset{m-1}{\mathrm{\Σ}}}(\frac{n_u*{\mathrm{Tx}}_{\mathrm{RE}\_u\_\mathrm{PDCCH}}}{M_{\mathrm{RE}\_\mathrm{celli}\_\mathrm{PDCCH}}}*\frac{M_{i0\_\mathrm{PDCCH}}}{M_{\mathrm{RE}\_\mathrm{cell}0\_\mathrm{PDCCH}}})+{\mathrm{Tx}}_{\mathrm{RE}\_i\_\mathrm{CRS}}*{\mathrm{\α}}_{\mathrm{Interi}\_\mathrm{CRS}}$

$+{\mathrm{Tx}}_{\mathrm{RE}\_i\_\mathrm{PCFICH}}*{\mathrm{\α}}_{\mathrm{Interi}\_\mathrm{PCFICH}}+{\mathrm{Tx}}_{\mathrm{RE}\_i\_\mathrm{PHICH}}*{\mathrm{\α}}_{\mathrm{Interi}\_\mathrm{PHICH}};$

Wherein, Tx _iThe transmission power level of expression interfered cell control domain; n _uExpression interfered cell Cell _iThe RE number of the PDCCH Resource Unit of u user equipment allocation of scheduling; Tx _{RE_u_PDCCH}Expression interfered cell Cell _iEach RE transmission power level of the PDCCH of u subscriber equipment; Tx _{RE_i_CRS}Expression interfered cell Cell _iEach RE transmission power level of CRS; Tx _{RE_i_PCFICH}Expression interfered cell Cell _iEach RE transmission power level of PCFICH; Tx _{RE_i_PHICH}Expression interfered cell Cell _iEach RE transmission power level of PHICH; M _{I0_PDCCH}Expression interfered cell Cell _iWith by interfered cell Cell ₀RE number with PDCCH frequently; M _{RE_cell0_PDCCH}Expression is by interfered cell Cell ₀The total RE number of PDCCH; M _{RE_celli_PDCCH}Expression interfered cell Cell _iThe total RE number of PDCCH; α _{Interi_CRS}The expression subscriber equipment sub-district Cell that is interfered _iThe probability of interference of middle CRS; α _{Interi_PCFICH}The expression subscriber equipment sub-district Cell that is interfered _iThe probability of interference of middle PCFICH; α _{Interi_PHICH}The expression subscriber equipment sub-district Cell that is interfered _iThe probability of interference of middle PHICH.

5. method as claimed in claim 3 is characterized in that, confirms the probability of interference of PDCCH according to formula:

Confirm the probability of interference of PHICH according to formula:

Confirm the probability of interference of PCFICH according to formula:

Confirm the probability of interference of CRS according to formula:

Wherein, α _{Interi_PDCCH}The expression subscriber equipment sub-district Cell that is interfered _iThe probability of interference of middle PDCCH; α _{Interi_CRS}The expression subscriber equipment sub-district Cell that is interfered _iThe probability of interference of middle CRS; α _{Interi_PCFICH}The expression subscriber equipment sub-district Cell that is interfered _iThe probability of interference of middle PCFICH; α _{Interi_PHICH}The expression subscriber equipment sub-district Cell that is interfered _iThe probability of interference of middle PHICH; M _{I0_PDCCH}Expression interfered cell Cell _iWith by interfered cell Cell ₀RE number with PDCCH frequently; M _{RE_celli_PDCCH_use}The RE number of the PDCCH that the expression interfered cell is assigned with; M _{The RE_celli_ interference source}Expression interfered cell Cell _iThe total RE number of interference source; M _{The RE_cell0_ interference source}Expression interfered cell Cell ₀The total RE number of interference source; M _{I0_CRS}Expression interfered cell Cell _iWith by interfered cell Cell ₀RE number with CRS frequently; M _{I0_PCFICH}Expression interfered cell Cell _iWith by interfered cell Cell ₀RE number with PCFICH frequently; M _{I0_PHICH}Expression interfered cell Cell _iWith by interfered cell Cell ₀RE number with PHICH frequently.

6. the method for claim 1 is characterized in that, confirms that the corresponding equivalent parameters value of each interfered cell comprises:

To an interfered cell; If this interfered cell is not in by the strong jamming cell list of interference user equipment; With the transmission power level of this interfered cell control domain divided by by the link load of interference user equipment to this interfered cell; Obtain equivalent interference value, and with the equivalent parameters value of said equivalent interference value as this interfered cell correspondence;

To an interfered cell; If this interfered cell is in by the strong jamming cell list of interference user equipment; The transmission power level of this interfered cell control domain multiply by by interference user equipment channel matrix that should interfered cell; Obtain interfered cell equivalent constructions matrix, and with the equivalent parameters value of said interfered cell equivalent constructions matrix as this interfered cell correspondence.

7. the method for claim 1 is characterized in that, confirms said Serving cell equivalent constructions matrix according to formula:

H _Eff0=Tx _{The RE_UE0_ interference source}* H ₀

Wherein, H _Eff0Expression is by the corresponding Serving cell equivalent constructions matrix of interference user equipment; Tx _{The RE_UE0_ interference source}Expression Serving cell Cell ₀The transmitting power of middle interference source; H ₀Expression is by the interference user equipment UE ₀To Serving cell Cell ₀Channel matrix.

8. like claim 5 or 7 described methods, it is characterized in that said interference source is in following:

PDCCH, PHICH, PCFICH and CRS.

9. like the arbitrary described method of claim 1～7, it is characterized in that the average signal-to-noise ratio of said definite subcarrier comprises:

Carry out input according to the equivalent parameters value of each interfered cell correspondence on each number of sub-carrier with by the corresponding Serving cell equivalent constructions matrix of interference user equipment, obtain the signal to noise ratio of each number of sub-carrier;

The signal to noise ratio summation of each number of sub-carrier is made even all, obtain the average signal-to-noise ratio of subcarrier.

10. the equipment of a definite channel performance is characterized in that, this equipment comprises:

The parameter value determination module is used for the transmission power level according to each interfered cell control domain, confirms the equivalent parameters value that each interfered cell is corresponding;

The signal to noise ratio determination module is used for confirming the average signal-to-noise ratio of subcarrier according to the equivalent parameters value of each interfered cell correspondence with by the corresponding Serving cell equivalent constructions matrix of interference user equipment;

The performance determination module is used for the average signal-to-noise ratio according to subcarrier, confirms the performance of down-bound pilot frequency signal or control channel.

11. equipment as claimed in claim 10 is characterized in that, said control channel comprises following part or all of channel:

Physical downlink control channel PDCCH, physical mixed automatic request retransmission indicating channel PHICH and Physical Control Format Indicator Channel PCFICH;

Said control channel down-bound pilot frequency signal comprises:

The exclusive pilot signal CRS in sub-district.

12. equipment as claimed in claim 11 is characterized in that, said parameter value determination module is confirmed the transmission power level of each interfered cell control domain according to the following step:

According to the probability of interference of down-bound pilot frequency signal and each control channel, confirm the transmission power level of each interfered cell control domain.

13. equipment as claimed in claim 12 is characterized in that, said parameter value determination module is confirmed the transmission power level of interfered cell control domain according to formula:

${\mathrm{Tx}}_i=\underset{u=0}{\overset{m-1}{\mathrm{\Σ}}}(\frac{n_u*{\mathrm{Tx}}_{\mathrm{RE}\_u\_\mathrm{PDCCH}}}{M_{\mathrm{RE}\_\mathrm{celli}\_\mathrm{PDCCH}}}*\frac{M_{i0\_\mathrm{PDCCH}}}{M_{\mathrm{RE}\_\mathrm{cell}0\_\mathrm{PDCCH}}})+{\mathrm{Tx}}_{\mathrm{RE}\_i\_\mathrm{CRS}}*{\mathrm{\α}}_{\mathrm{Interi}\_\mathrm{CRS}}$

$+{\mathrm{Tx}}_{\mathrm{RE}\_i\_\mathrm{PCFICH}}*{\mathrm{\α}}_{\mathrm{Interi}\_\mathrm{PCFICH}}+{\mathrm{Tx}}_{\mathrm{RE}\_i\_\mathrm{PHICH}}*{\mathrm{\α}}_{\mathrm{Interi}\_\mathrm{PHICH}};$

Wherein, Tx _iThe transmission power level of expression interfered cell control domain; n _uExpression interfered cell Cell _iThe RE number of the PDCCH Resource Unit of u user equipment allocation of scheduling; Tx _{RE_u_PDCCH}Expression interfered cell Cell _iEach RE transmission power level of the PDCCH of u subscriber equipment; Tx _{RE_i_CRS}Expression interfered cell Cell _iEach RE transmission power level of CRS; Tx _{RE_i_PCFICH}Expression interfered cell Cell _iEach RE transmission power level of PCFICH; Tx _{RE_i_PHICH}Expression interfered cell Cell _iEach RE transmission power level of PHICH; M _{I0_PDCCH}Expression interfered cell Cell _iWith by interfered cell Cell ₀RE number with PDCCH frequently; M _{RE_cell0_PDCCH}Expression is by interfered cell Cell ₀The total RE number of PDCCH; M _{RE_celli_PDCCH}Expression interfered cell Cell _iThe total RE number of PDCCH; α _{Interi_CRS}The expression subscriber equipment sub-district Cell that is interfered _iThe probability of interference of middle CRS; α _{Interi_PCFICH}The expression subscriber equipment sub-district Cell that is interfered _iThe probability of interference of middle PCFICH; α _{Interi_PHICH}The expression subscriber equipment sub-district Cell that is interfered _iThe probability of interference of middle PHICH.

14. equipment as claimed in claim 12 is characterized in that, said parameter value determination module is confirmed the probability of interference of PDCCH according to formula:

Said parameter value determination module is confirmed the probability of interference of PHICH according to formula:

Said parameter value determination module is confirmed the probability of interference of PCFICH according to formula:

Said parameter value determination module is confirmed the probability of interference of CRS according to formula:

Wherein, α _{Interi_PDCCH}The expression subscriber equipment sub-district Cell that is interfered _iThe probability of interference of middle PDCCH; α _{Interi_CRS}The expression subscriber equipment sub-district Cell that is interfered _iThe probability of interference of middle CRS; α _{Interi_PCFICH}The expression subscriber equipment sub-district Cell that is interfered _iThe probability of interference of middle PCFICH; α _{Interi_PHICH}The expression subscriber equipment sub-district Cell that is interfered _iThe probability of interference of middle PHICH; M _{I0_PDCCH}Expression interfered cell Cell _iWith by interfered cell Cell ₀RE number with PDCCH frequently; M _{RE_celli_PDCCH_use}The RE number of the PDCCH that the expression interfered cell is assigned with; M _{The RE_celli_ interference source}Expression interfered cell Cell _iThe total RE number of interference source; M _{The RE_cell0_ interference source}Expression interfered cell Cell ₀The total RE number of interference source; M _{I0_CRS}Expression interfered cell Cell _iWith by interfered cell Cell ₀RE number with CRS frequently; M _{I0_PCFICH}Expression interfered cell Cell _iWith by interfered cell Cell ₀RE number with PCFICH frequently; M _{I0_PHICH}Expression interfered cell Cell _iWith by interfered cell Cell ₀RE number with PHICH frequently.

15. equipment as claimed in claim 10 is characterized in that, said parameter value determination module specifically is used for:

To an interfered cell; If this interfered cell is not in by the strong jamming cell list of interference user equipment; With the transmission power level of this interfered cell control domain divided by by the link load of interference user equipment to this interfered cell; Obtain equivalent interference value, and with the equivalent parameters value of said equivalent interference value as this interfered cell correspondence;

To an interfered cell; If this interfered cell is in by the strong jamming cell list of interference user equipment; The transmission power level of this interfered cell control domain multiply by by interference user equipment channel matrix that should interfered cell; Obtain interfered cell equivalent constructions matrix, and with the equivalent parameters value of said interfered cell equivalent constructions matrix as this interfered cell correspondence.

16. equipment as claimed in claim 10 is characterized in that, said signal to noise ratio determination module is confirmed said Serving cell equivalent constructions matrix according to formula:

H _Eff0=Tx _{The RE_UE0_ interference source}* H ₀

Wherein, H _Eff0Expression is by the corresponding Serving cell equivalent constructions matrix of interference user equipment; Tx _{The RE_UE0_ interference source}Expression Serving cell Cell ₀The transmitting power of middle interference source; H ₀Expression is by the interference user equipment UE ₀To Serving cell Cell ₀Channel matrix.

17., it is characterized in that said interference source is in following like claim 14 or 16 described equipment:

PDCCH, PHICH, PCFICH and CRS.

18., it is characterized in that said signal to noise ratio determination module specifically is used for like the arbitrary described equipment of claim 10～16:

Carry out input according to the equivalent parameters value of each interfered cell correspondence on each number of sub-carrier with by the corresponding Serving cell equivalent constructions matrix of interference user equipment, obtain the signal to noise ratio of each number of sub-carrier;

The signal to noise ratio summation of each number of sub-carrier is made even all, obtain the average signal-to-noise ratio of subcarrier.

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