CN109743123B - Port number determination method and device, computer equipment and storage medium - Google Patents
Port number determination method and device, computer equipment and storage medium Download PDFInfo
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Abstract
The application relates to a method and a device for determining port number, a computer device and a storage medium, wherein a terminal device determines the initial transmission port number of an NPBCH signal according to a first port power and a second port power for acquiring the NPBCH signal, and then performs secondary confirmation on the initial transmission port number through the initial transmission port number and an SNR of an NRS of the first port to obtain a target transmission port number, so that the initial judgment is performed through the physical quantity related to the NRS of the NPBCH signal, and then the initial judgment result is verified, thereby avoiding directly determining the transmission port number by respectively demodulating and decoding a single port and a double port of the NPBCH, greatly reducing the complexity of port number determination process operation and shortening the processing time.
Description
Technical Field
The application relates to the technical field of narrow-band internet of things, in particular to a method and a device for determining port number, computer equipment and a storage medium.
Background
Narrow-Band Internet of Things (Narrow Band Internet of Things, NB-IoT for short) is a new technology in the field of Internet of Things, is constructed in a cellular network, supports cellular data connection of low-power consumption equipment in a wide area network (wan), is also called as a low-power consumption wide area network (LPWAN), and is widely applied to various vertical industries, such as remote meter reading, asset tracking, intelligent parking, smart agriculture and the like, due to the characteristics of wide coverage, multiple connections, high speed, low cost, low power consumption, excellent architecture and the like.
The NB-IoT system is the same as a Long Term Evolution (LTE) system, and when a terminal reads a Physical Broadcast Channel (PBCH) to obtain information, the number of downlink broadcast ports used by the PBCH needs to be correctly detected, and the number of downlink broadcast ports needs to be determined by analyzing the terminal.
However, the above method for determining the number of ports needs to traverse all possible port number situations, the whole process is mechanical, the operation complexity is high, and the processing time is long.
Disclosure of Invention
Based on this, it is necessary to provide a method, an apparatus, a computer device and a storage medium for determining the number of ports, for the technical problems that the above method for determining the number of ports needs to traverse all possible port number situations, the whole process is mechanical, the operation complexity is high, and the processing time is long.
In a first aspect, an embodiment of the present invention provides a method for determining a port number, where the method includes:
respectively acquiring first port power corresponding to a narrowband reference signal NRS of a first port and second port power corresponding to NRS of a second port according to a narrowband physical broadcast channel NPBCH signal;
determining the initial transmission port number of the NPBCH signal according to the first port power and the second port power;
and determining the target transmission port number of the NPBCH signal according to the initial transmission port number and the signal-to-noise ratio (SNR) of the NRS of the first port.
In one embodiment, the obtaining a first port power corresponding to a narrowband reference signal NRS of a first port and a second port power corresponding to an NRS of a second port includes:
determining the initial transmission port number of the NPBCH signal according to the first port power, the second port power, the first power difference value and the second power difference value; the first power difference value represents a power difference value with a port number of 1, and the second power difference value represents a power difference value with a port number of 2.
In one embodiment, the determining the initial number of transmission ports of the NPBCH signal according to the first port power, the second port power, the first power difference value and the second power difference value includes:
if the first port power is larger than the sum of the second port power and the first power difference, determining that the number of the initial transmission ports of the NPBCH signal is 1;
if the difference between the first port power and the second port power is smaller than a preset threshold value, determining that the number of the initial transmission ports of the NPBCH signal is 2;
and if the sum of the difference values of the first port power and the second power is less than the second port power, determining that the number of the initial transmission ports of the NPBCH signal is 0.
In one embodiment, before determining the target number of transmission ports of the NPBCH signal according to the initial number of transmission ports and the SNR of the NRS of the first port, the method includes:
and determining the SNR of the NRS of the first port according to the power of the first port and the noise power.
In one embodiment, the determining the target number of transmission ports of the NPBCH signal according to the initial number of transmission ports and the SNR of the NRS of the first port includes:
and determining the target transmission port number of the NPBCH signal according to the initial transmission port number, the SNR of the NRS of the first port, the noise threshold value and the NPBCH equalization demodulation decoding threshold value.
In one embodiment, the determining the target number of transmission ports of the NPBCH signal according to the initial number of transmission ports, the SNR of the NRS of the first port, the noise threshold value and the NPBCH equalization demodulation decoding threshold value includes:
if the SNR of the NRS of the first port is larger than the noise threshold value, determining that the initial transmission port number is the target transmission port number of the NPBCH signal;
if the SNR of the NRS of the first port is greater than the NPBCH equalization demodulation decoding threshold value and the SNR of the NRS of the first port is less than or equal to the noise threshold value, determining that the number of target transmission ports of the NPBCH signal is 2;
and if the SNR of the NRS of the first port is less than or equal to the NPBCH equalization demodulation decoding threshold value, determining that the target transmission port number of the NPBCH signal is empty.
In one embodiment, before acquiring a first port power corresponding to a narrowband reference signal NRS of a first port and a second port power corresponding to an NRS of a second port according to a narrowband physical broadcast channel NPBCH signal, respectively, the method further includes:
and converting the NPBCH signal into a frequency domain signal from a time domain signal by adopting a fast Fourier transform algorithm.
In a second aspect, an embodiment of the present invention provides an apparatus for determining a port number, where the apparatus includes:
an obtaining module, configured to obtain, according to a narrowband physical broadcast channel NPBCH signal, a first port power corresponding to a narrowband reference signal NRS of a first port and a second port power corresponding to an NRS of a second port, respectively;
a first determining module, configured to determine an initial number of transmission ports of the NPBCH signal according to the first port power and the second port power;
a second determining module, configured to determine a target number of transmission ports of the NPBCH signal according to the initial number of transmission ports and a signal-to-noise ratio SNR of the NRS of the first port.
In a third aspect, an embodiment of the present invention provides a computer device, including a memory and a processor, where the memory stores a computer program, and the processor implements the following steps when executing the computer program:
respectively acquiring first port power corresponding to a narrowband reference signal NRS of a first port and second port power corresponding to NRS of a second port according to a narrowband physical broadcast channel NPBCH signal;
determining the initial transmission port number of the NPBCH signal according to the first port power and the second port power;
and determining the target transmission port number of the NPBCH signal according to the initial transmission port number and the signal-to-noise ratio (SNR) of the NRS of the first port.
In a fourth aspect, an embodiment of the present invention is a computer-readable storage medium, on which a computer program is stored, the computer program, when executed by a processor, implementing the steps of:
respectively acquiring first port power corresponding to a narrowband reference signal NRS of a first port and second port power corresponding to NRS of a second port according to a narrowband physical broadcast channel NPBCH signal;
determining the initial transmission port number of the NPBCH signal according to the first port power and the second port power;
and determining the target transmission port number of the NPBCH signal according to the initial transmission port number and the signal-to-noise ratio (SNR) of the NRS of the first port.
The method, the device, the computer equipment and the storage medium for determining the number of ports provided by the embodiment of the application, the terminal equipment determines the number of initial transmission ports of an NPBCH signal according to the first port power and the second port power of the NPBCH signal, and then performs secondary confirmation on the number of the initial transmission ports through the number of the initial transmission ports and the SNR of NRS of the first port to obtain the number of target transmission ports, so that initial judgment is performed through the physical quantity related to NRS of the NPBCH signal, and then the initial judgment result is verified, thereby avoiding directly demodulating and decoding single and double ports of the NPBCH respectively to judge the number of the transmission ports, greatly reducing the complexity of operation in the port number determination process and shortening the processing time.
Drawings
Fig. 1 is an application environment diagram of a method for determining a port number according to an embodiment;
fig. 2 is a flowchart illustrating a method for determining a port number according to an embodiment;
fig. 3 is a flowchart illustrating a method for determining a port number according to an embodiment;
fig. 4 is a flowchart illustrating a method for determining a port number according to an embodiment;
fig. 5 is a block diagram of a device for determining the number of ports according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The method for determining the number of ports provided by the present application can be applied to an application environment as shown in fig. 1, and the terminal device may be a server, and the terminal device includes a processor, a memory, a network interface, and a database connected through a system bus. Wherein the processor of the terminal device is configured to provide computing and control capabilities. The memory of the terminal equipment comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the terminal device is used for storing data of the determination method of the port number. The network interface of the terminal device is used for connecting and communicating with other external devices through a network. The computer program is executed by a processor to implement a method of determining a port number.
Embodiments of the present application provide a method, an apparatus, a computer device, and a storage medium for determining a port number, and aim to solve the technical problems that the method for determining a port number needs to traverse all possible port number conditions, the whole process is mechanical, the operation complexity is high, and the processing time is long. The following describes in detail the technical solutions of the present application and how the technical solutions of the present application solve the above technical problems by embodiments and with reference to the drawings. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. It should be noted that, in the method for determining the number of ports provided by the present invention, an execution main body is a terminal device, where the execution main body may also be a device for determining the number of ports, and the device may be implemented as part or all of the device for determining the number of ports by software, hardware, or a combination of software and hardware.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In an embodiment, as shown in fig. 2, an embodiment of the present application provides a method for determining a port number, where this embodiment relates to a specific process that a terminal device determines an initial transmission port number of an NPBCH signal according to a first port power and a second port power, and then performs secondary confirmation on the initial transmission port number by using an SNR of a first port NRS to obtain a target transmission port number, and as shown in fig. 2, the method includes:
s101, respectively acquiring first port power corresponding to a narrowband reference signal NRS of a first port and second port power corresponding to an NRS of a second port according to the NPBCH signal.
In this step, the terminal device receives a Narrowband Physical Broadcast Channel (NPBCH) signal transmitted by the base station first, and then, according to the NPBCH signal, the terminal device obtains first port power corresponding to a Narrowband Reference Signal (NRS) of the first port and second port power corresponding to an NRS of the second port respectively, where the manner in which the terminal device obtains the first port power and the second port power may be that an absolute value square of frequency domain data of the NRS of the first port and the NRS of the second port is determined as the first port power and the second port power, or may be that calculation is performed in other manners, which is not limited in this embodiment.
S102, determining the initial transmission port number of the NPBCH signal according to the first port power and the second port power.
Based on the first port power and the second port power determined by the terminal device in the step S101, the terminal device determines the initial number of transmission ports of the NPBCH signal, where the terminal device may determine the quality of the PBCH signal transmitted by the channel according to the specific values of the first port power and the second port power, and determine the number of ports transmitting the PBCH signal according to the excellent quality, that is, the initial number of ports, and of course, the manner of determining the initial number of transmission ports by the terminal device may be other manners, which is not limited in this embodiment.
S103, determining the target transmission port number of the NPBCH signal according to the initial transmission port number and the SNR of the NRS of the first port.
Based on the initial transmission port number determined by the terminal device in the step S102, the terminal device determines the target transmission port number of the NPBCH Signal according to the initial transmission port number and the Signal-to-Noise Ratio (SNR for short) of the first port NRS. The terminal device may first determine the actual noise power in the current channel in the NPBCH signal transmitted by the channel of the first port according to the SNR of the NRS of the first port, and perform secondary determination on the initial number of transmission ports according to the actual noise power, to obtain the finally determined number of transmission ports, which is the target number of transmission ports. Similarly, the terminal device may determine the number of target transmission ports in other manners, which is not limited in this embodiment.
In the method for determining the number of ports provided by this embodiment, a terminal device determines the number of initial transmission ports of an NPBCH signal according to a first port power and a second port power of the NPBCH signal, and then performs secondary confirmation on the number of initial transmission ports through the number of initial transmission ports and an SNR of an NRS of the first port to obtain the number of target transmission ports, so that initial judgment is performed through a physical quantity related to the NRS of the NPBCH signal, and then the initial judgment result is verified, thereby avoiding directly performing demodulation and decoding on a single port and a double port of the NPBCH signal to judge the number of transmission ports, thereby greatly reducing the complexity of port number determination process operation and shortening processing time.
The following describes a specific process for determining the initial transmission port number and the target transmission port number by the terminal device through several embodiments.
In an embodiment, an embodiment of the present application provides a method for determining a port number, where the terminal device in this embodiment determines an initial transmission port number of an NPBCH signal according to a first port power, a second port power, a first power difference value, and a second power difference value, where the step S102 includes: determining the initial transmission port number of the NPBCH signal according to the first port power, the second port power, the first power difference value and the second power difference value; the first power difference value represents a power difference value with a port number of 1, and the second power difference value represents a power difference value with a port number of 2.
The first port power and the second port power are the values determined in the above embodiment. The first power difference value represents a power difference value when the number of ports is 1, and the second power difference value represents a power difference value when the number of ports is 2. The specific values of the first power difference value and the second power difference value can be simulated by using ideal parameters through a simulation environment to obtain a specific value.
In practical application, the terminal device determines the initial transmission port number of the NPBCH signal according to the first port power, the second port power, the first power difference value, and the second power difference value, where the determination method may be that the terminal device inputs each parameter into a simulation environment for simulation according to a specific numerical value of the first port power, the second port power, the first power difference value, and the second power difference value, and then determines the initial transmission port number according to a simulation result, which may be other methods, and this embodiment does not limit this.
Optionally, one implementation manner of determining, by the terminal device, the initial number of transmission ports of the NPBCH signal according to the first port power, the second port power, the first power difference value, and the second power difference value includes three schemes, which are the following scheme a, scheme B, and scheme C:
in the scheme a, if the first port power is greater than the sum of the second port power and the first power difference, it is determined that the initial transmission port number of the NPBCH signal is 1.
In this scheme, the terminal device determines, according to the first port power, the second port power, and the first power difference determined in the above embodiment, whether the first port power is greater than a sum of the second port power and the first power difference, and if the first port power is greater than the sum of the second port power and the first power difference, which indicates that the first port channel quality is good, the terminal device determines that the initial transmission port number of the NPBCH signal is 1.
In the scheme B, if the difference between the first port power and the second port power is smaller than a preset threshold, it is determined that the initial transmission port number of the NPBCH signal is 2.
In the scheme, the terminal device calculates a difference value between the power of the first port and the power of the second port, and if the difference value between the power of the first port and the power of the second port is smaller than a preset threshold value, which indicates that the quality of the two channels is good, the terminal device determines that the number of the initial transmission ports of the NPBCH signal is 2. The preset threshold is set by a user in a self-defined way and is a very small value, which indicates that the power of the first port is approximately equal to the power of the second port.
And in the scheme C, if the sum of the difference values of the first port power and the second power is less than the second port power, determining that the initial transmission port number of the NPBCH signal is 0.
In the scheme, the terminal equipment judges whether the sum of the difference values of the first port power and the second power is smaller than the second port power, if the sum of the difference values of the first port power and the second power is smaller than the second port power, the fact that an NPBCH signal channel is abnormal is indicated, the first port is inevitably present, namely the fact that interference possibly exists in NRS of the second port can be determined, the terminal equipment determines that the number of initial transmission ports of the NPBCH signal is 0, subsequent processing is not carried out on the currently received signal, and the method is repeated when the next frame of signal arrives to judge the initial transmission ports.
Illustratively, the initial number of transmission ports is set to be N, and the power of the first port is set to be Pport1The second port has power Pport2If the first power difference is Δ p1 and the second power difference is Δ p2, the terminal device determines the initial number of transmission ports according to the following formula (1).
In the method for determining the number of ports provided in this embodiment, the terminal device determines the initial number of transmission ports of the NPBCH signal according to the magnitude relationship among the first port power, the second port power, the first power difference value, and the second power difference value, so that the initial determination is performed on the number of transmission ports according to the relevant physical quantity of the NRS, and the determination of the number of ports by directly demodulating and decoding the single port and the double ports of the NPBCH respectively is avoided, thereby greatly reducing the complexity of the operation in the port number determination process and shortening the processing time.
Since the first port is definitely present, in the case that the initial number of transmission ports is determined in the above embodiment, in order to ensure the accuracy of the determined number of transmission ports, verification may be performed through noise in the channel of the first port, and in one embodiment, the method includes: and determining the SNR of the NRS of the first port according to the power of the first port and the noise power. The method for determining the SNR of the NRS of the first port by the terminal device through the first port power and the noise power may be that a ratio of the first port power to the noise power is determined, where the noise power may be simulated through an ideal parameter in a simulation environment to obtain a specific value, which represents an ideal noise power. Illustratively, the first port power is set to Pport1Noise power of PnThe SNR of the first port NRS is determined according to the following equation (2).
SNR＝Pport1/Pn (2)
In another embodiment, an embodiment of the present application provides a method for determining a port number, where the embodiment relates to a specific process of a terminal device determining a target transmission port number of an NPBCH signal according to an initial transmission port number, an SNR of an NRS of a first port, a noise threshold, and an NPBCH equalization demodulation decoding threshold, and then the step S103 includes: and determining the target transmission port number of the NPBCH signal according to the initial transmission port number, the SNR of the NRS of the first port, the noise threshold value and the NPBCH equalization demodulation decoding threshold value.
The initial number of transmission ports is determined in the above embodiment, and the value may be 1 or 2. The noise threshold value represents a critical value of noise in the NPBCH signal, the NPBCH equalization demodulation decoding threshold value represents a critical value when the NPBCH signal is demodulated and decoded, and for specific numerical values of the noise threshold value and the NPBCH equalization demodulation decoding threshold value, a specific value can be obtained by performing simulation using ideal parameters in a simulation environment.
In practical application, the terminal device determines the number of target transmission ports of the NPBCH signal according to the initial number of transmission ports, the SNR of the first port NRS, the noise threshold, and the NPBCH equalization demodulation decoding threshold, where the determining manner may be that the terminal device inputs each parameter into a simulation environment for simulation according to specific numerical values of the initial number of transmission ports, the SNR of the first port NRS, the noise threshold, and the NPBCH equalization demodulation decoding threshold, and then determines the number of target transmission ports according to a simulation result, which may be other manners, which is not limited in this embodiment.
Optionally, one implementation manner for the terminal device to determine the target number of transmission ports of the NPBCH signal according to the initial number of transmission ports, the SNR of the NRS of the first port, the noise threshold, and the NPBCH equalization demodulation decoding threshold includes three schemes, which are the following scheme D, scheme E, and scheme F:
and in the scheme D, if the SNR of the NRS of the first port is greater than the noise threshold value, determining that the initial transmission port number is the target transmission port number of the NPBCH signal.
In this scheme, the terminal device determines whether the SNR of the first port NRS is greater than the noise threshold according to the specific values of the SNR of the first port NRS and the noise threshold determined above, and if the SNR of the first port NRS is greater than the noise threshold, it indicates that the noise power in the NPBCH signal is relatively small, and the determined initial number of transmission ports is reliable, so that the initial number of transmission ports is determined as the target number of transmission ports of the NPBCH signal, that is, the terminal device demodulates and decodes the NPBCH signal with the determined initial number of transmission ports.
And in scheme E, if the SNR of the first port NRS is greater than the NPBCH equalization demodulation decoding threshold and the SNR of the first port NRS is less than or equal to the noise threshold, determining that the number of target transmission ports of the NPBCH signal is 2.
In this scheme, if the terminal device determines that the SNR of the first port NRS is less than or equal to the noise threshold, which indicates that the noise power in the NPBCH signal is relatively large, the power of the first port and the power of the second port are substantially the same, that is, the determined initial number of transmission ports is 2, then the terminal device determines that the target number of transmission ports is 2, that is, the terminal device demodulates and decodes the NPBCH signal with the dual-port number, if the SNR of the first port NRS is greater than the NPBCH equalization demodulation decoding threshold, which indicates that the current channel quality is good.
And in a scheme F, if the SNR of the NRS of the first port is less than or equal to the NPBCH equalization demodulation decoding threshold value, determining that the target transmission port number of the NPBCH signal is null.
In this scheme, if it is determined that the SNR of the NRS of the first port is less than or equal to the NPBCH equalization demodulation decoding threshold, which indicates that the current channel quality is too poor to meet the NPBCH signal demodulation decoding requirement, the terminal device determines that the number of target transmission ports of the NPBCH signal is empty, that is, the signal is not demodulated and decoded, and waits for the next frame data to be processed.
Illustratively, the target transmission port number is set to be M, the determined initial transmission port number is N, and the noise threshold value is SNRTHNPBCH equalization demodulation decoding threshold value is SNRTH_DMThen the terminal device determines the number of target transmission ports according to the following formula (3).
In the method for determining the number of ports provided in this embodiment, the terminal device determines the channel quality and the noise influence corresponding to each port according to the magnitude relationship among the initial number of transmission ports, the SNR of the NRS of the first port, the noise threshold, and the NPBCH equalization demodulation decoding threshold, so as to determine the number of target transmission ports of the NPBCH signal.
In view of the fact that an NPBCH signal received by a terminal device is a time-domain signal, and a frequency-domain signal of the NPBCH signal needs to be used when the method for determining the number of ports provided by the embodiment of the present application is adopted, in an embodiment, the embodiment of the present application provides a method for determining the number of ports, and the terminal device related to the embodiment converts a received NPBCH signal from a time-domain signal to a frequency-domain signal, and the method includes: and converting the NPBCH signal from a time domain signal to a frequency domain signal by adopting a fast Fourier transform algorithm. In this embodiment, the terminal device converts the time domain signal of the received NPBCH signal into the frequency domain signal of the NPBCH signal through a Fast Fourier Transform (FFT), and it should be noted that the terminal device converts the time domain signal of the NPBCH signal into the frequency domain signal except for using other algorithms for conversion.
In the method for determining the number of ports provided by this embodiment, the terminal device converts the received NPBCH signal from a time domain signal to a frequency domain signal, so that the complex signal is decomposed into a superposition of simple signals (sinusoidal signals), and the first port power and the second port power of the NPBCH signal can be calculated more accurately.
It should be understood that, although the steps in the flowchart of fig. 2 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a portion of the steps in fig. 2 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
In one embodiment, as shown in fig. 3, an embodiment of the present application provides a device for determining a port number, including: an obtaining module 10, a first determining module 11 and a second determining module 12, wherein:
an obtaining module 10, configured to obtain a first port power corresponding to a narrowband reference signal NRS of a first port and a second port power corresponding to an NRS of a second port, respectively, from an NPBCH signal;
a first determining module 11, configured to determine an initial number of transmission ports of the NPBCH signal according to the first port power and the second port power;
a second determining module 12, configured to determine a target number of transmission ports of the NPBCH signal according to the initial number of transmission ports and the SNR of the NRS of the first port.
The implementation principle and technical effect of the device for determining the number of ports provided by the above embodiment are similar to those of the above method embodiment, and are not described herein again.
In an embodiment, an embodiment of the present application provides an apparatus for determining a port number, where the first determining module 11 includes: a first determining unit 111, configured to determine an initial number of transmission ports of the NPBCH signal according to the first port power, the second port power, a first power difference value, and a second power difference value; the first power difference value represents a power difference value with a port number of 1, and the second power difference value represents a power difference value with a port number of 2.
In an embodiment, as shown in fig. 4, an embodiment of the present application provides an apparatus for determining a port number, where the determining unit 111 includes: a first initial port determination subunit 1111, a second initial port determination subunit 1112, and a third initial port determination subunit 1113. Wherein:
a first initial port determining subunit 1111, configured to determine that the initial number of transmission ports of the NPBCH signal is 1 if the first port power is greater than the sum of the second port power and the first power difference;
a second initial port determining subunit 1112, configured to determine that the initial number of transmission ports of the NPBCH signal is 2 if a difference between the first port power and the second port power is smaller than a preset threshold;
a third initial port determining subunit 1113, configured to determine that the initial number of transmission ports of the NPBCH signal is 0 if the sum of the differences between the first port power and the second port power is smaller than the second port power.
The implementation principle and technical effect of the device for determining the number of ports provided by the above embodiment are similar to those of the above method embodiment, and are not described herein again.
In one embodiment, an embodiment of the present application provides an apparatus for determining a port number, where the apparatus includes: and the signal-to-noise ratio determining module is used for determining the SNR of the NRS of the first port according to the power of the first port and the noise power.
In an embodiment, the present application provides an apparatus for determining a port number, where the second determining module 12 includes: a second determining unit 121, configured to determine a target number of transmission ports of the NPBCH signal according to the initial number of transmission ports, the SNR of the NRS of the first port, the noise threshold, and the NPBCH equalization demodulation decoding threshold.
In an embodiment, as shown in fig. 5, an embodiment of the present application provides an apparatus for determining a port number, where the second determining unit 121 includes: a first target port determination subunit 1211, a second target port determination subunit 1212, and a third target port determination subunit 1213.
A first destination port determining subunit 1211, configured to determine, if the SNR of the first port NRS is greater than the noise threshold value, that the initial number of transmission ports is a destination number of transmission ports of the NPBCH signal;
a second destination port determining subunit 1212, configured to determine that the number of destination transmission ports of the NPBCH signal is 2 if the SNR of the first port NRS is greater than the NPBCH equalization demodulation decoding threshold and the SNR of the first port NRS is less than or equal to the noise threshold;
a third destination port determining subunit 1213, configured to determine that the number of destination transmission ports of the NPBCH signal is null if the first port NRS is less than or equal to the NPBCH equalization demodulation decoding threshold.
The implementation principle and technical effect of the device for determining the number of ports provided by the above embodiment are similar to those of the above method embodiment, and are not described herein again.
In one embodiment, the present application provides an apparatus for determining a port number, the apparatus further includes a conversion module, configured to convert the NPBCH signal from a time-domain signal to a frequency-domain signal by using a fast fourier transform algorithm.
The implementation principle and technical effect of the device for determining the number of ports provided by the above embodiment are similar to those of the above method embodiment, and are not described herein again.
For specific limitations of the device for determining the number of ports, reference may be made to the above limitations of the method for determining the number of ports, which are not described herein again. The modules in the device for determining the number of ports may be implemented in whole or in part by software, hardware, and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a terminal, the internal structure of which may be as described above in fig. 1. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a method of determining a port number. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
Those skilled in the art will appreciate that the above-described architecture shown in fig. 1 is merely a block diagram of some of the structures associated with the present solution, and does not constitute a limitation on the computing devices to which the present solution applies, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program:
respectively acquiring first port power corresponding to a narrowband reference signal NRS of a first port and second port power corresponding to NRS of a second port according to the NPBCH signal;
determining the initial transmission port number of the NPBCH signal according to the first port power and the second port power;
and determining the target transmission port number of the NPBCH signal according to the initial transmission port number and the SNR of the NRS of the first port.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
respectively acquiring first port power corresponding to a narrowband reference signal NRS of a first port and second port power corresponding to NRS of a second port according to the NPBCH signal;
determining the initial transmission port number of the NPBCH signal according to the first port power and the second port power;
and determining the target transmission port number of the NPBCH signal according to the initial transmission port number and the SNR of the NRS of the first port.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method for determining a port number, the method comprising:
respectively acquiring first port power corresponding to a narrowband reference signal NRS of a first port and second port power corresponding to NRS of a second port according to a narrowband physical broadcast channel NPBCH signal;
determining the initial transmission port number of the NPBCH signal according to the first port power, the second port power, the first power difference value and the second power difference value; the first power difference value represents a power difference value with the port number of 1, and the second power difference value represents a power difference value with the port number of 2;
determining the SNR of the NRS of the first port according to the power of the first port and the noise power;
determining the target transmission port number of the NPBCH signal according to the initial transmission port number, the SNR of the NRS of the first port, the noise threshold value and the NPBCH equalization demodulation decoding threshold value; the noise threshold value represents a critical value of noise in the NPBCH signal, and the NPBCH equalization demodulation decoding threshold value represents a critical value when the NPBCH signal is demodulated and decoded.
2. The method of claim 1, wherein the determining the initial number of transmission ports of the NPBCH signal according to the first port power, the second port power, the first power difference and the second power difference comprises:
if the first port power is larger than the sum of the second port power and the first power difference, determining that the number of the initial transmission ports of the NPBCH signal is 1;
if the difference between the first port power and the second port power is smaller than a preset threshold value, determining that the number of the initial transmission ports of the NPBCH signal is 2;
and if the sum of the difference values of the first port power and the second power is less than the second port power, determining that the number of the initial transmission ports of the NPBCH signal is 0.
3. The method of claim 1, wherein the determining the initial number of transmission ports of the NPBCH signal according to the first port power, the second port power, the first power difference and the second power difference comprises:
inputting the first port power, the second port power, the first power difference value and the second power difference value into a preset first simulation environment for simulation to obtain a simulation result;
and determining the number of the initial transmission ports according to the simulation result.
4. The method of claim 1, wherein determining the target number of transmission ports of the NPBCH signal according to the initial number of transmission ports, the SNR of the NRS for the first port, a noise threshold and an NPBCH equalization demodulation decoding threshold comprises:
if the SNR of the NRS of the first port is larger than the noise threshold value, determining that the initial transmission port number is the target transmission port number of the NPBCH signal;
if the SNR of the NRS of the first port is greater than the NPBCH equalization demodulation decoding threshold value and the SNR of the NRS of the first port is less than or equal to the noise threshold value, determining that the number of target transmission ports of the NPBCH signal is 2;
and if the SNR of the NRS of the first port is less than or equal to the NPBCH equalization demodulation decoding threshold value, determining that the target transmission port number of the NPBCH signal is empty.
5. The method of claim 1, wherein determining the target number of transmission ports of the NPBCH signal according to the initial number of transmission ports, the SNR of the NRS for the first port, a noise threshold and an NPBCH equalization demodulation decoding threshold comprises:
inputting the initial transmission port number, the SNR of the NRS of the first port, the noise threshold value and the NPBCH balanced demodulation decoding threshold value into a preset second simulation environment for simulation to obtain a simulation result;
and determining the number of the target transmission ports according to the simulation result.
6. The method of claim 1, wherein said determining the SNR for the NRS for the first port based on the first port power and noise power comprises:
determining a ratio of the first port power and the noise power as an SNR of the first port NRS.
7. The method of claim 1, wherein before obtaining the power of a first port corresponding to the NRS of the narrowband reference signal NRS of the first port and the power of a second port corresponding to the NRS of the second port respectively according to the NPBCH signal, the method further comprises:
and converting the NPBCH signal into a frequency domain signal from a time domain signal by adopting a fast Fourier transform algorithm.
8. An apparatus for determining a port number, the apparatus comprising:
an obtaining module, configured to obtain, according to a narrowband physical broadcast channel NPBCH signal, a first port power corresponding to a narrowband reference signal NRS of a first port and a second port power corresponding to an NRS of a second port, respectively;
a first determining module, configured to determine an initial number of transmission ports of the NPBCH signal according to the first port power, the second port power, a first power difference value, and a second power difference value; the first power difference value represents a power difference value with the port number of 1, and the second power difference value represents a power difference value with the port number of 2;
a signal-to-noise ratio determining module, configured to determine, according to the first port power and the noise power, an SNR of the NRS at the first port;
a second determining module, configured to determine a target number of transmission ports of the NPBCH signal according to the initial number of transmission ports, the SNR of the NRS of the first port, a noise threshold, and an NPBCH equalization demodulation decoding threshold; the noise threshold value represents a critical value of noise in the NPBCH signal, and the NPBCH equalization demodulation decoding threshold value represents a critical value when the NPBCH signal is demodulated and decoded.
9. A computer device comprising a memory and a processor, the memory storing a computer program, wherein the processor implements the steps of the method of any one of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 7.
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