CN103188183B - The acquisition methods of C-RS interference-to-noise ratio and device in LTE planning simulation - Google Patents

Abstract

The invention discloses acquisition methods and the device of a kind of Long Term Evolution (LTE) planning simulation small area DRS (Dedicated Reference Signal) (C-RS) interference-to-noise ratio, obtain test data and base station information table；Calculate the Reference Signal Received Power (RSRP) of each Serving cell according to test data and base station information table, and calculate the adjacent area interference signal intensity of each Serving cell；RSRP according to each Serving cell and the C-RS interference-to-noise ratio of the adjacent area interference signal intensity each Serving cell of acquisition；The present invention also discloses the acquisition device of C-RS interference-to-noise ratio in a kind of LTE planning simulation, pass through the solution of the present invention, after adding up the distribution of C-RS interference-to-noise ratio of each Serving cell, system loading and disturbed condition can be considered in LTE planning simulation, obtain C-RS interference-to-noise ratio accurately, improve the foreseeable accuracy of LTE spreadability.

Description

The acquisition methods of C-RS interference-to-noise ratio and device in LTE planning simulation

Technical field

The present invention relates to the network plan simulation technology in radio communication, particularly relate to acquisition methods and the device of a kind of Long Term Evolution (LTE) planning simulation small area DRS (Dedicated Reference Signal) (C-RS, Cell-SpecificReferenceSignal) interference-to-noise ratio.

Background technology

Cell special reference (C-RS, Cell-SpecificReferenceSignal) is the downlink physical signal of LTE protocol definition, for the estimation of downlink wireless channel.

C-RS carrier-in-interference noise ratio (CINR) or C-RS Signal Interference and Noise Ratio (SINR) are the ratio of Serving cell C-RS signal intensity and interference signal intensity, described Serving cell C-RS signal intensity refers to the Reference Signal Received Power (RSRP, ReferenceSignalReceivingPower) of Serving cell.By calculating C-RSCINR or C-RSSINR, can reflect that the C-RS of Serving cell is disturbed degree, therefore in the network plan simulation of LTE communication system, C-RSCINR or C-RSSINR is the important indicator of prediction network covering property.

According to definition about C-RS in third generation partner program (3GPP) agreement 36.211, in actual network environment, the C-RS of Serving cell is disturbed by two parts, a part is from interference to Serving cell C-RS of the C-RS of abutting subdistrict, and another part is from the interference to Serving cell C-RS of the down physical channel (PDSCH) of abutting subdistrict.

According to definition about C-RS in agreement 36.211, the time-frequency location of C-RS and physical-layer cell identifier (PCI, Physical-layerCellIdentity) configure relevant.When cell downlink port number is configured to 2 or 4, C-RS has 3 variable time-frequency location, the general employing PCI configuration to 3 deliverys.

Interference suffered by Serving cell C-RS is relevant with PCI configuration.If the PCI of abutting subdistrict and Serving cell is equal to 3 deliverys, so exist for the C-RS of the abutting subdistrict interference to Serving cell C-RS, the i.e. C-RS time-frequency location of Serving cell and the C-RS time-frequency location of abutting subdistrict is identical, otherwise there is the PDSCH of the abutting subdistrict interference to Serving cell C-SR.And the PDSCH of abutting subdistrict is relevant with the system loading of abutting subdistrict and Serving cell to the interference of Serving cell C-SR.

And in current LTE planning simulation, the calculating for C-RSCINR or C-RSSINR does not considers above two interference and the impact of system loading.

Summary of the invention

In view of this, present invention is primarily targeted at acquisition methods and the device that C-RS interference-to-noise ratio in a kind of LTE planning simulation is provided, system loading and disturbed condition can be considered in LTE planning simulation, obtain C-RS interference-to-noise ratio accurately, improve the foreseeable accuracy of LTE spreadability.

For reaching above-mentioned purpose, the technical scheme is that and be achieved in that:

The acquisition methods of C-RS interference-to-noise ratio in a kind of LTE planning simulation that the present invention provides, the method includes:

Obtain test data and base station information table；

Calculate the RSRP of each Serving cell according to described test data and base station information table, and calculate the adjacent area interference signal intensity of each Serving cell；

RSRP according to each Serving cell and the C-RS interference-to-noise ratio of the adjacent area interference signal intensity each Serving cell of acquisition.

In such scheme, described C-RS interference-to-noise ratio is C-RS signal SINR or C-RS signal CINR.

In such scheme, the adjacent area interference signal intensity of each Serving cell of described calculating is: according to the configuration of each Serving cell PCI, determine that each Serving cell exists the C-RS interference of abutting subdistrict or the PDSCH interference of abutting subdistrict, and calculate corresponding adjacent area interference signal intensity according to the conflicting mode determined.

In such scheme, described Serving cell PCI is configured that when Serving cell downlink port number is configured to 1, and the configuration of PCI uses PCI to 6 deliverys；When Serving cell downlink port number is configured to 2 or 4, the configuration of PCI uses PCI to 3 deliverys.

In such scheme, the adjacent area interference signal intensity of each Serving cell of described calculating is: when Serving cell PCI to 3 deliverys and the PCI of abutting subdistrict to the result of 3 deliverys equal time, there is the C-RS interference of abutting subdistrict in Serving cell, then adjacent area interference signal intensity I is:

I=P_load*RB_numberThe RSRP of * equal to 3 deliverys for 2* ∑ PCI abutting subdistrict i_Neighbor

Wherein, abutting subdistrict system loading is P_load, Resource Block (RB) number corresponding to abutting subdistrict system bandwidth is for RB_number, RSRP_NeighborRSRP for abutting subdistrict i equal to 3 deliverys for PCI；

When Serving cell PCI to the PCI of 3 deliverys and abutting subdistrict to the result of 3 deliverys unequal time, there is the PDSCH interference of abutting subdistrict in Serving cell, then adjacent area interference signal intensity I is:

Wherein, abutting subdistrict system loading is P_load, RB number corresponding to abutting subdistrict system bandwidth is RB_number, RE represents resource particle.

In such scheme, the described RSRP according to each Serving cell and adjacent area interference signal intensity obtain the C-RS interference-to-noise ratio of each Serving cell and are:

The C-RSCINR of each Serving cell is:

$C-\mathrm{RS\; CINR}=10*\lg \left(\frac{P_{\mathrm{load}}*{\mathrm{RB}}_{\mathrm{number}}*2*{\mathrm{RSRP}}_{\mathrm{serving}}}{I+N}\right)$

Wherein, RSRP_servingRepresenting linear value corresponding to Serving cell RSRP, I represents adjacent area interference signal intensity, and N represents that receiver noise power, abutting subdistrict system loading are P_load, RB number corresponding to abutting subdistrict system bandwidth is RB_number。

The acquisition device of interference-to-noise ratio in a kind of LTE planning simulation that the present invention provides, this device includes: data acquisition module, RSRP module, adjacent area interference calculation module, noise ratio acquisition module；Wherein,

Data acquisition module, is used for obtaining test data and base station information table, and described test data and base station information table is sent to RSRP module；

RSRP module, for calculating the RSRP of each Serving cell according to described test data and base station information table；

Adjacent area interference calculation module, for calculating the adjacent area interference signal intensity of each Serving cell；

Noise ratio acquisition module, obtains the C-RS interference-to-noise ratio of each Serving cell for the RSRP according to each Serving cell and adjacent area interference signal intensity.

In such scheme, described adjacent area interference calculation module, specifically for the configuration according to each Serving cell PCI, determine that each Serving cell exists the C-RS interference of abutting subdistrict or the PDSCH interference of abutting subdistrict, and calculate corresponding interference signal intensity according to the conflicting mode determined.

In such scheme, described noise ratio acquisition module, specifically for the RSRP of each Serving cell and adjacent area interference signal intensity being substituted into formula below acquisition C-RSCINR:

$C-\mathrm{RS\; CINR}=10*\lg \left(\frac{P_{\mathrm{load}}*{\mathrm{RB}}_{\mathrm{number}}*2*{\mathrm{RSRP}}_{\mathrm{serving}}}{I+N}\right)$

Wherein, RSRP_servingRepresenting linear value corresponding to Serving cell RSRP, I represents adjacent area interference signal intensity, and N represents that receiver noise power, abutting subdistrict system loading are P_load, RB number corresponding to abutting subdistrict system bandwidth is RB_number。

The invention provides acquisition methods and the device of C-RS interference-to-noise ratio in a kind of LTE planning simulation, obtain test data and base station information table；Calculate the RSRP of each Serving cell according to test data and base station information table, and calculate the adjacent area interference signal intensity of each Serving cell；RSRP according to each Serving cell and the C-RS interference-to-noise ratio of the adjacent area interference signal intensity each Serving cell of acquisition；So, after adding up the distribution of C-RS interference-to-noise ratio of each Serving cell, it is possible to consider system loading and disturbed condition in LTE planning simulation, obtain C-RS interference-to-noise ratio accurately, improve the foreseeable accuracy of LTE spreadability.

Accompanying drawing explanation

Fig. 1 is that the present invention realizes the schematic flow sheet of the acquisition methods of C-RS interference-to-noise ratio in LTE planning simulation；

Fig. 2 is that the present invention realizes the structural representation of the acquisition device of C-RS interference-to-noise ratio in LTE planning simulation.

Detailed description of the invention

The basic thought of the present invention is: obtain test data and base station information table；Calculate the RSRP of each Serving cell according to described test data and base station information table, and calculate the adjacent area interference signal intensity of each Serving cell；RSRP according to each Serving cell and the C-RS interference-to-noise ratio of the adjacent area interference signal intensity each Serving cell of acquisition.

Below by drawings and the specific embodiments, the present invention is described in further detail.

The present invention realizes the acquisition methods of C-RS interference-to-noise ratio in a kind of LTE planning simulation, as it is shown in figure 1, the method includes following step:

Step 101: obtain test data and base station information table；

Concrete, the test data of webmaster or base station and base station information table are imported to locally stored in, wherein, the test data of importing can be existing network drive test data, such as GSM drive test data or UMTS drive test data, it is also possible to is data based on propagation model prediction；In the present embodiment, as a example by importing existing network drive test data.

Step 102: calculate the RSRP of each Serving cell according to described test data and base station information table；

This step can use the method that prior art calculates RSRP, repeats no more here.

Step 103: calculate the adjacent area interference signal intensity of each Serving cell；

Concrete, according to the configuration of each Serving cell PCI, determine that each Serving cell exists the C-RS interference of abutting subdistrict or the PDSCH interference of abutting subdistrict, and calculate corresponding adjacent area interference signal intensity according to the conflicting mode determined；

Described Serving cell PCI to be configured that Serving cell downlink port number is adjacent the configuration of cell downlink port number the most identical, when Serving cell downlink port number is configured to 1, C-RS has 6 variable time-frequency location, and the configuration of PCI uses PCI to 6 deliverys；When Serving cell downlink port number is configured to 2 or 4, the configuration of PCI uses PCI to 3 deliverys；

Below as a example by the configuration of PCI uses PCI to 3 deliverys, describe this step in detail:

When Serving cell PCI to 3 deliverys and the PCI of abutting subdistrict to the result of 3 deliverys equal time, there is the C-RS interference of abutting subdistrict in Serving cell, then adjacent area interference signal intensity I is:

I=P_load*RB_numberThe RSRP of * equal to 3 deliverys for 2* ∑ PCI abutting subdistrict i_Neighbor

Wherein, abutting subdistrict system loading is P_load, Resource Block (RB, ResourceBlock) number corresponding to abutting subdistrict system bandwidth is for RB_number, RSRP_NeighborRSRP for abutting subdistrict i equal to 3 deliverys for PCI；

When Serving cell PCI to the PCI of 3 deliverys and abutting subdistrict to the result of 3 deliverys unequal time, there is the PDSCH interference of abutting subdistrict in Serving cell, then adjacent area interference signal intensity I is:

Wherein, abutting subdistrict system loading is P_load, RB number corresponding to abutting subdistrict system bandwidth is RB_numberDescribed abutting subdistrict system bandwidth is the most identical with serving cell system band width configuration, as being all 20MHz, RE represents resource particle, the every RE of described PDSCH receives the acquisition of power: pre-set the transmitting power offset value of PDSCH Yu C-RS signal, transmitting power offset value according to C-RS signal, calculates the transmitting power of the every RE of PDSCH, i.e.

The every RE of PDSCH receives the every RE of power=PDSCH and launches power-path loss；

It addition, the transmitting power offset value of PDSCH Yu C-RS signal can be inquired at webmaster.

Step 104: according to RSRP and the C-RS interference-to-noise ratio of the adjacent area interference signal intensity each Serving cell of acquisition of each Serving cell；

Concrete, described C-RS interference-to-noise ratio generally refers to C-RSSINR or C-RSCINR, owing to the computing formula of C-RSSINR with C-RSCINR is identical, below as a example by C-RSCINR, shown in the C-RSCINR of each Serving cell such as formula (1):

$C-\mathrm{RS\; CINR}=10*\lg \left(\frac{P_{\mathrm{load}}*{\mathrm{RB}}_{\mathrm{number}}*2*{\mathrm{RSRP}}_{\mathrm{serving}}}{I+N}\right)---\left(1\right)$

Wherein, RSRP_servingRepresenting linear value corresponding to Serving cell RSRP, I represents adjacent area interference signal intensity, and N represents receiver noise power, and the computation bandwidth of N is P_load*R_Bnumber* 2, abutting subdistrict system loading is P_load, RB number corresponding to abutting subdistrict system bandwidth is RB_number, described P_loadAnd RB_numberValue can pre-set.

In order to realize said method, the present invention also provides for the acquisition device of C-RS interference-to-noise ratio in a kind of LTE planning simulation, as in figure 2 it is shown, this device includes: data acquisition module 21, RSRP module 22, adjacent area interference calculation module 23, noise ratio acquisition module 24；Wherein,

Data acquisition module 21, is used for obtaining test data and base station information table, and described test data and base station information table is sent to RSRP module 22；

RSRP module 22, for calculating the RSRP of each Serving cell according to described test data and base station information table；

Adjacent area interference calculation module 23, for calculating the adjacent area interference signal intensity of each Serving cell；

Noise ratio acquisition module 24, obtains the C-RS interference-to-noise ratio of each Serving cell for the RSRP according to each Serving cell and adjacent area interference signal intensity；

Described data acquisition module 21, specifically for the test data of webmaster or base station and base station information table are imported to locally stored in, and described test data and base station information table are sent to RSRP module 22, wherein, the test data imported can be existing network drive test data, such as GSM drive test data or UMTS drive test data, it is also possible to be data based on propagation model prediction；

Described adjacent area interference calculation module 23, specifically for the configuration according to each Serving cell PCI, determines that each Serving cell exists the C-RS interference of abutting subdistrict or the PDSCH interference of abutting subdistrict, and calculates corresponding interference signal intensity according to the conflicting mode determined；

Described noise ratio acquisition module 24, obtains C-RSCINR specifically for the RSRP of each Serving cell and adjacent area interference signal intensity are substituted into formula (1).

The above, only presently preferred embodiments of the present invention, it is not intended to limit protection scope of the present invention.

Claims (7)

1. the acquisition methods of a Long Term Evolution LTE planning simulation small area DRS (Dedicated Reference Signal) C-RS interference-to-noise ratio, it is characterised in that the method includes:

Obtain test data and base station information table；

Calculate the Reference Signal Received Power RSRP of each Serving cell according to described test data and base station information table, and calculate the adjacent area interference signal intensity of each Serving cell；

RSRP according to each Serving cell and the C-RS interference-to-noise ratio of the adjacent area interference signal intensity each Serving cell of acquisition；Wherein,

The described RSRP according to each Serving cell and adjacent area interference signal intensity obtain the C-RS interference-to-noise ratio of each Serving cell:

$10*\lg \left(\frac{P_{load}*{\mathrm{RB}}_{number}*2*{\mathrm{RSRP}}_{serving}}{I+N}\right)$

Wherein, RSRP_servingRepresenting linear value corresponding to Serving cell RSRP, I represents adjacent area interference signal intensity, and N represents that receiver noise power, abutting subdistrict system loading are P_load, RB number corresponding to abutting subdistrict system bandwidth is RB_number。

Acquisition methods the most according to claim 1, it is characterised in that described C-RS interference-to-noise ratio is C-RS Signal Interference and Noise Ratio SINR or C-RS carrier-in-interference noise ratio CINR.

Acquisition methods the most according to claim 1, it is characterized in that, the adjacent area interference signal intensity of each Serving cell of described calculating is: according to the configuration of each Serving cell physical-layer cell identifier PCI, determine that each Serving cell exists the C-RS interference of abutting subdistrict or the down physical channel PDSCH interference of abutting subdistrict, and calculate corresponding adjacent area interference signal intensity according to the conflicting mode determined.

Acquisition methods the most according to claim 3, it is characterised in that described Serving cell PCI is configured that when Serving cell downlink port number is configured to 1, the configuration of PCI uses PCI to 6 deliverys；When Serving cell downlink port number is configured to 2 or 4, the configuration of PCI uses PCI to 3 deliverys.

Acquisition methods the most according to claim 4, it is characterized in that, the adjacent area interference signal intensity of each Serving cell of described calculating is: when Serving cell PCI to 3 deliverys and the PCI of abutting subdistrict to the result of 3 deliverys equal time, there is the C-RS interference of abutting subdistrict in Serving cell, then adjacent area interference signal intensity I is:

I=P_load*RB_numberThe RSRP of * equal to 3 deliverys for 2* Σ PCI abutting subdistrict i_Neighbor

Wherein, abutting subdistrict system loading is P_load, Resource Block RB number corresponding to abutting subdistrict system bandwidth is RB_number, RSRP_NeighborRSRP for abutting subdistrict i equal to 3 deliverys for PCI；

When Serving cell PCI to the PCI of 3 deliverys and abutting subdistrict to the result of 3 deliverys unequal time, there is the PDSCH interference of abutting subdistrict in Serving cell, then adjacent area interference signal intensity I is:

The every RE of PDSCH of 3 delivery unequal abutting subdistrict i is received power

Wherein, abutting subdistrict system loading is P_load, RB number corresponding to abutting subdistrict system bandwidth is RB_number, RE represents resource particle.

6. the acquisition device of interference-to-noise ratio in a LTE planning simulation, it is characterised in that this device includes: data acquisition module, RSRP module, adjacent area interference calculation module, noise ratio acquisition module；Wherein,

Data acquisition module, is used for obtaining test data and base station information table, and described test data and base station information table is sent to RSRP module；

RSRP module, for calculating the RSRP of each Serving cell according to described test data and base station information table；

Adjacent area interference calculation module, for calculating the adjacent area interference signal intensity of each Serving cell；

Noise ratio acquisition module, obtains the C-RS interference-to-noise ratio of each Serving cell for the RSRP according to each Serving cell and adjacent area interference signal intensity；Wherein,

Described noise ratio acquisition module, specifically for the RSRP of each Serving cell and adjacent area interference signal intensity being substituted into formula below acquisition C-RSCINR:

$C-RSCINR=10*\lg \left(\frac{P_{load}*{\mathrm{RB}}_{number}*2*{\mathrm{RSRP}}_{serving}}{I+N}\right)$

Wherein, RSRP_servingRepresenting linear value corresponding to Serving cell RSRP, I represents adjacent area interference signal intensity, and N represents that receiver noise power, abutting subdistrict system loading are P_load, RB number corresponding to abutting subdistrict system bandwidth is RB_number。

Acquisition device the most according to claim 6, it is characterized in that, described adjacent area interference calculation module, specifically for the configuration according to each Serving cell PCI, determine that each Serving cell exists the C-RS interference of abutting subdistrict or the PDSCH interference of abutting subdistrict, and calculate corresponding interference signal intensity according to the conflicting mode determined.