CN111491311A - Method and device for measuring received power of reference signal of synchronous signal block - Google Patents
Method and device for measuring received power of reference signal of synchronous signal block Download PDFInfo
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- CN111491311A CN111491311A CN201910082009.4A CN201910082009A CN111491311A CN 111491311 A CN111491311 A CN 111491311A CN 201910082009 A CN201910082009 A CN 201910082009A CN 111491311 A CN111491311 A CN 111491311A
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Abstract
The invention provides a method and a device for measuring the received power of a reference signal of a synchronous signal block, belonging to the technical field of wireless communication. A method for measuring reference signal received power (SSB RSRP) of a synchronization signal block is applied to a terminal and comprises the following steps: acquiring interference power based on the measurement result of the synchronous signals of different symbols in the same time slot; and calculating to obtain SSB RSRP according to the interference power. By the technical scheme, the RSRP measurement accuracy can be improved.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for measuring received power of a reference signal of a synchronization signal block.
Background
In a dense urban area and under a scenario that SSB (Synchronization Signal Block) configures horizontal wide beam time-frequency domain alignment, test results show that as the single station zoom distance increases, the RSRP (referential Signal Receiving Power) of SSB gradually decreases, but as the zoom distance reaches 500 meters, the fluctuation range of the RSRP of SSB is large, and can reach [ -80dB, -120dB ], and specific reasons are related to an SSB implementation mechanism, and are as follows:
the SSB RSRP is calculated as a difference between received power and noise/interference, and it is defined in the standard that the received power is measured by using SSS (Secondary Synchronization Signal) reference signals, but reference signals for noise/interference measurement are not limited. The existing network uses a PBCH (Physical Broadcast Channel) DMRS (Demodulation Reference Signal) to measure noise/interference, and the accuracy of the existing network is affected by the DMRS Reference Signal with the same adjacent SSB data domain and mode, that is, the larger the adjacent SSB interference is, the worse the RSRP estimation accuracy is, so that the RSRP fluctuation range may be larger.
Disclosure of Invention
The invention aims to provide a method and a device for measuring reference signal received power of a synchronization signal block, which can improve the accuracy of RSRP measurement.
To solve the above technical problem, embodiments of the present invention provide the following technical solutions:
the embodiment of the invention provides a method for measuring the reference signal received power (SSB RSRP) of a synchronous signal block, which is applied to a terminal and comprises the following steps:
acquiring interference power based on the measurement result of the synchronous signals of different symbols in the same time slot;
and calculating to obtain SSB RSRP according to the interference power.
Further, the obtaining interference power based on the measurement result of the synchronization signals of different symbols of the same time slot comprises:
respectively measuring SSB RSRP by adopting a main synchronous signal and an auxiliary synchronous signal of different symbols in the same time slot;
and determining the interference power according to the relation between the primary synchronization signal and the secondary synchronization signal of different symbols in the same time slot.
Further, the obtaining interference power based on the measurement result of the synchronization signal includes:
calculating interference power interference (RSRP) by using the following formula:
wherein, X1 and X2 respectively represent the primary synchronization signal and the secondary synchronization signal, the channel matrix H1 of the primary synchronization signal symbol is equal to the channel matrix H2 of the secondary synchronization signal symbol is equal to H, and Y1 and Y2 respectively represent the received signals of the terminal on the symbols of the primary synchronization signal and the secondary synchronization signal.
Further, the calculating the SSB RSRP according to the interference power includes:
the SSB RSRP is calculated using the following formula:
the embodiment of the invention also provides a device for measuring the reference signal received power (SSB RSRP) of the synchronous signal block, which is applied to a terminal and comprises the following components:
the interference power calculation module is used for obtaining interference power based on the measurement result of the synchronous signals of different symbols of the same time slot;
and the processing module is used for calculating to obtain the SSB RSRP according to the interference power.
Further, the interference power calculation module is specifically configured to measure the SSB RSRP using a primary synchronization signal and a secondary synchronization signal of different symbols in the same timeslot; and determining the interference power according to the relation between the primary synchronization signal and the secondary synchronization signal of different symbols in the same time slot.
Further, the interference power calculation module is specifically configured to calculate an interference power interference RSRP by using the following formula:
wherein, X1 and X2 respectively represent the primary synchronization signal and the secondary synchronization signal, the channel matrix H1 of the primary synchronization signal symbol is equal to the channel matrix H2 of the secondary synchronization signal symbol is equal to H, and Y1 and Y2 respectively represent the received signals of the terminal on the symbols of the primary synchronization signal and the secondary synchronization signal.
Further, the processing module is specifically configured to calculate the SSB RSRP by using the following formula:
the embodiment of the invention also provides a device for measuring the reference signal received power (SSB RSRP) of the synchronous signal block, which comprises: memory, a processor and a computer program stored on the memory and executable on the processor, which when executed by the processor implements the steps in the SSB RSRP measurement method as described above.
Embodiments of the present invention also provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps in the SSB RSRP measurement method as described above.
The embodiment of the invention has the following beneficial effects:
in the above scheme, interference power is obtained based on the measurement results of the synchronization signals of different symbols of the same time slot, and the SSB RSRP is calculated according to the interference power, and specifically, the RSRP can be measured according to the primary and secondary synchronization signals with longer sequences and better orthogonality of different symbols in the same time slot, so that the RSRP measurement accuracy is improved, and a more effective reference is provided for 5G coverage correlation analysis.
Drawings
FIG. 1 is a diagram illustrating RSRP versus distance;
FIG. 2 is a flowchart illustrating a method for measuring received power of a synchronization signal block reference signal according to an embodiment of the present invention;
fig. 3 is a block diagram of an apparatus for measuring synchronization signal block reference signal received power according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
The names and abbreviations of the terms related to the present invention may be changed correspondingly, and the technical solution of the present invention is still applicable when the abbreviations are changed.
In a scenario where the frequency domain is aligned when the SSB is configured with a horizontal wide beam in dense urban areas, as shown in fig. 1, the test result shows that the SSB RSRP gradually decreases with the increase of the single station zoom distance, but the SSB RSRP fluctuation range is large up to 500 meters, and can reach [ -80dB, -120dB ], and the specific reason is related to the SSB implementation mechanism, and specifically follows:
the SSB RSRP is calculated as a difference between received power and noise/interference, and the received power is measured by using SSS reference signals, but reference signals for noise/interference measurement are not defined in the standard. The existing network adopts the PBCH DMRS to measure noise/interference, but the PBCH DMRS to measure the noise/interference has certain limitation, the accuracy of the measurement is influenced by the adjacent SSB data domain and the DMRS reference signal with the same mode, namely the larger the interference of the adjacent SSB is, the worse the RSRP estimation accuracy is, and the larger the fluctuation range of the RSRP is possibly caused. The DMRS is configured with a narrowband 20RB (resource Block) and the frequency domain density is 3RE (resource element)/RB, and the PSS/SSS is configured with a narrowband 12RB and the frequency domain density is 12 RE/RB. Compared with the DMRS, the primary and secondary synchronization signals PSS/SSS are longer in sequence and better in inter-cell orthogonality, so that the RSRP measurement accuracy is higher based on the PSS/SSS.
An embodiment of the present invention provides a method for measuring synchronization signal block reference signal received power SSB RSRP, which is applied to a terminal, and as shown in fig. 2, the method includes:
step 101: acquiring interference power based on the measurement result of the synchronous signals of different symbols in the same time slot;
step 102: and calculating to obtain SSB RSRP according to the interference power.
In this embodiment, interference power is obtained based on the measurement result of the synchronization signals of different symbols in the same time slot, and the SSB RSRP is obtained by calculation according to the interference power, and specifically, the RSRP can be measured according to the primary and secondary synchronization signals with longer sequences and better orthogonality of different symbols in the same time slot, so that the RSRP measurement accuracy is improved, and a more effective reference is provided for 5G coverage correlation analysis.
Further, the obtaining interference power based on the measurement result of the synchronization signals of different symbols of the same time slot comprises:
respectively measuring SSB RSRP by adopting a main synchronous signal and an auxiliary synchronous signal of different symbols in the same time slot;
and determining the interference power according to the relation between the primary synchronization signal and the secondary synchronization signal of different symbols in the same time slot.
Further, the obtaining interference power based on the measurement result of the synchronization signal includes:
calculating interference power interference (RSRP) by using the following formula:
wherein, X1 and X2 respectively represent the primary synchronization signal and the secondary synchronization signal, the channel matrix H1 of the primary synchronization signal symbol is equal to the channel matrix H2 of the secondary synchronization signal symbol is equal to H, and Y1 and Y2 respectively represent the received signals of the terminal on the symbols of the primary synchronization signal and the secondary synchronization signal.
Further, the calculating the SSB RSRP according to the interference power includes:
the SSB RSRP is calculated using the following formula:
the technical solution of the present invention is further described below with reference to specific embodiments, and the SSBRSRP measurement method of the present embodiment includes the following steps:
firstly, the SSB RSRP is measured by using the PSS and the SSS in the same time slot, and the sending process of the downlink primary synchronization signal and the secondary synchronization signal can be expressed as
Y1＝H1X1+N1
Y2＝H2X2+N2
Wherein X1 and X2 respectively represent PSS and SSS, H1 and H2 respectively represent channel matrices of PSS and SSS symbols, and Y1 and Y2 respectively represent received signals of terminals on PSS and SSS symbols.
Then, deriving the power calculation mode of SSB noise/interference according to the relation between PSS and SSS of different symbols of the same time slot,
Y1X1H＝H1X1X1H+N1X1H
Y2X2H＝H2X2X2H+N2X2H
the difference values are obtained by making the equation left and right respectively,
(Y1X1H-Y2X2H)＝N1X1H-N2X2H
it is assumed that the channel state change between the co-slot PSS and SSS symbols is negligible, i.e., H1-H2.
The power of the noise/interference can therefore be expressed as,
finally, subtracting the noise/interference power based on the PSS from the total received power based on SSS measurement to obtain an SSBRSRP estimate:
in the embodiment, the noise/interference estimation is carried out by selecting the primary and secondary synchronization signals with longer sequences, so that the measurement accuracy of the 5G SSB RSRP can be effectively improved.
An embodiment of the present invention further provides a synchronization signal block reference signal received power SSB RSRP measurement apparatus, which is applied to a terminal, and as shown in fig. 3, the apparatus includes:
an interference power calculation module 21, configured to obtain interference power based on a measurement result of synchronization signals of different symbols of a timeslot;
and the processing module 22 is configured to calculate an SSB RSRP according to the interference power.
In this embodiment, interference power is obtained based on the measurement result of the synchronization signals of different symbols in the same time slot, and the SSB RSRP is obtained by calculation according to the interference power, and specifically, the RSRP can be measured according to the primary and secondary synchronization signals with longer sequences and better orthogonality of different symbols in the same time slot, so that the RSRP measurement accuracy is improved, and a more effective reference is provided for 5G coverage correlation analysis.
Further, the interference power calculating module 21 is specifically configured to measure the SSB RSRP by using a primary synchronization signal and a secondary synchronization signal of different symbols of a same time slot respectively; and determining the interference power according to the relation between the primary synchronization signal and the secondary synchronization signal of different symbols in the same time slot.
Further, the interference power calculation module 21 is specifically configured to calculate an interference power interference RSRP by using the following formula:
wherein, X1 and X2 respectively represent the primary synchronization signal and the secondary synchronization signal, the channel matrix H1 of the primary synchronization signal symbol is equal to the channel matrix H2 of the secondary synchronization signal symbol is equal to H, and Y1 and Y2 respectively represent the received signals of the terminal on the symbols of the primary synchronization signal and the secondary synchronization signal.
Further, the processing module 22 is specifically configured to calculate the SSB RSRP by using the following formula:
the embodiment of the invention also provides a device for measuring the reference signal received power (SSB RSRP) of the synchronous signal block, which comprises: memory, a processor and a computer program stored on the memory and executable on the processor, which when executed by the processor implements the steps in the SSB RSRP measurement method as described above.
Embodiments of the present invention also provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps in the SSB RSRP measurement method as described above.
For a hardware implementation, the Processing units may be implemented within one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable logic devices (P L D), Field-Programmable Gate arrays (FPGAs), general purpose processors, controllers, microcontrollers, microprocessors, other electronic units configured to perform the functions described herein, or a combination thereof.
For a software implementation, the techniques described herein may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, user terminals (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing user terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing user terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing user terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing user terminal to cause a series of operational steps to be performed on the computer or other programmable user terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable user terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or user terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or user terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or user terminal that comprises the element.
While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.
Claims (10)
1. A method for measuring the reference signal received power (SSB RSRP) of a synchronous signal block is applied to a terminal and comprises the following steps:
acquiring interference power based on the measurement result of the synchronous signals of different symbols in the same time slot;
and calculating to obtain SSB RSRP according to the interference power.
2. The SSB RSRP measurement method of claim 1, wherein the obtaining interference power based on the measurement of synchronization signals of different symbols of a same time slot comprises:
respectively measuring SSB RSRP by adopting a main synchronous signal and an auxiliary synchronous signal of different symbols in the same time slot;
and determining the interference power according to the relation between the primary synchronization signal and the secondary synchronization signal of different symbols in the same time slot.
3. The SSB RSRP measurement method of claim 2, wherein the obtaining interference power based on the measurement result of the synchronization signal comprises:
calculating interference power interference (RSRP) by using the following formula:
wherein, X1 and X2 respectively represent the primary synchronization signal and the secondary synchronization signal, the channel matrix H1 of the primary synchronization signal symbol is equal to the channel matrix H2 of the secondary synchronization signal symbol is equal to H, and Y1 and Y2 respectively represent the received signals of the terminal on the symbols of the primary synchronization signal and the secondary synchronization signal.
4. The SSB RSRP measurement method of claim 3, wherein the calculating the SSB RSRP from the interference power comprises:
the SSB RSRP is calculated using the following formula:
5. a device for measuring the reference signal received power (SSB RSRP) of a synchronization signal block, which is applied to a terminal, comprises:
the interference power calculation module is used for obtaining interference power based on the measurement result of the synchronous signals of different symbols of the same time slot;
and the processing module is used for calculating to obtain the SSB RSRP according to the interference power.
6. The SSB RSRP measurement device according to claim 5, wherein the interference power calculation module is specifically configured to measure the SSB RSRP separately using primary and secondary synchronization signals of different symbols in the same timeslot; and determining the interference power according to the relation between the primary synchronization signal and the secondary synchronization signal of different symbols in the same time slot.
7. The SSB RSRP measurement device according to claim 6, wherein the interference power calculation module is specifically configured to calculate the interference power interference RSRP by using the following formula:
wherein, X1 and X2 respectively represent the primary synchronization signal and the secondary synchronization signal, the channel matrix H1 of the primary synchronization signal symbol is equal to the channel matrix H2 of the secondary synchronization signal symbol is equal to H, and Y1 and Y2 respectively represent the received signals of the terminal on the symbols of the primary synchronization signal and the secondary synchronization signal.
8. The SSB RSRP measurement device according to claim 7, wherein the processing module is specifically configured to calculate the SSB RSRP using the following formula:
9. a synchronization signal block reference signal received power, SSB, RSRP, measurement device, comprising: memory, a processor and a computer program stored on the memory and executable on the processor, which when executed by the processor implements the steps in the SSB RSRP measurement method of any of claims 1 to 4.
10. A computer-readable storage medium, having stored thereon a computer program which, when executed by a processor, implements the steps in the SSB RSRP measurement method of any of claims 1 to 4.
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