CN115914984A - Distributed wireless communication system time delay monitoring method, device, equipment and medium - Google Patents
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Abstract
The utility model provides a time delay monitoring method of a distributed wireless communication system, which determines the first position of a first main synchronizing signal sent by other RRUs in the same cell according to the preset sampling rate, the pre-configured main synchronizing signal sequence information and the main synchronizing signal position information; calculating the offset time of the first master synchronizing signal according to the first position, the preset position and the sampling rate of the first master synchronizing signal; responding to the deviation time exceeding the pre-configured time delay range, and sending a time delay alarm to high-level network element equipment in the distributed wireless communication system; the embodiment of the disclosure can realize the tracking and calibration of the air interface delay error, and perform the delay alarm to the high-level module when the air interface delay is determined to be larger, so that the problem that the high-level network element equipment does not sense the delay fault can be effectively solved, and the high-level network element equipment can process the delay fault in time conveniently. The disclosure also provides a time delay monitoring device, a computer device and a readable medium.
Description
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to a method and an apparatus for monitoring a delay in a distributed wireless communication system, a computer device, and a readable medium.
Background
In a wireless communication system, the transmission delay of radio frequency signals needs to be adjusted to ensure that the signals are transmitted at the same time, so that the working time of the whole network is aligned. Wireless communication systems have higher requirements on air interface delay, and especially in distributed wireless communication systems, air interface delay is difficult to adjust.
In the related art, after one time of delay adjustment, tracking calibration is not performed any more, so that an air interface delay error after delay adjustment is large. In some scenarios, such as product reset, transmission configuration change, etc., a delay adjustment error may also be generated, which further increases an air interface delay error, and affects a delay adjustment effect, and the high-level network element device cannot sense the air interface delay error.
Disclosure of Invention
The disclosure provides a distributed wireless communication system time delay monitoring method, a device, computer equipment and a readable medium.
In a first aspect, an embodiment of the present disclosure provides a method for monitoring a delay in a distributed wireless communication system, where the method includes:
determining a first position of a first main synchronizing signal according to a preset sampling rate, pre-configured main synchronizing signal sequence information and main synchronizing signal position information, wherein the first main synchronizing signal is sent by other RRUs in the same cell;
calculating the offset time of the first master synchronization signal according to the first position, the preset position and the sampling rate of the first master synchronization signal;
and responding to the deviation time of the first main synchronous signal exceeding a pre-configured time delay range, and sending a time delay alarm to higher-layer network element equipment in the distributed wireless communication system.
In some embodiments, the determining, according to a preset sampling rate, pre-configured primary synchronization signal sequence information and primary synchronization signal position information, a first position of a first primary synchronization signal sent by another radio remote unit RRU in a cell where the first position is located includes:
generating a first signal with a first length according to the sampling rate and pre-configured main synchronous signal sequence information;
intercepting the first main synchronous signal according to the position information of the main synchronous signal configured in advance to obtain a second signal with a second length;
determining a first position of the first master synchronization signal according to the first signal, the second signal, the first length, and the second length.
In some embodiments, the primary synchronization signal position information is a starting symbol position of the primary synchronization signal, and the second length is two time slots, where the two time slots include a time slot in which the first primary synchronization signal is located and a time slot before the time slot.
In some embodiments, said determining a first position of said first primary synchronization signal from said first signal, said second signal, said first length, and said second length comprises:
according to the first signal, the second signal, the first length and the second length, within the duration of the first length and the duration of the difference between the first length and the second length, signal sampling is carried out according to the sampling rate, and a plurality of first data are obtained through calculation;
normalizing each first data to obtain each second data;
determining third data with a numerical value larger than a preset first threshold value in the second data;
and in response to the number of the third data being smaller than a preset second threshold, determining a first position of the first master synchronization signal according to the third data.
In some embodiments, said determining a first location of said first primary synchronization signal from said third data comprises:
in response to the third data being more than one, determining the position of the sampling signal corresponding to the larger one of the third data, and taking the position of the sampling signal as the first position of the first master synchronization signal;
and in response to the third data being one, determining the position of the sampling signal corresponding to the third data, and using the position of the sampling signal as the first position of the first master synchronization signal.
In some embodiments, the delay alarm carries an offset time of the first primary synchronization signal, and after the delay alarm is sent to a higher-layer network element device in the distributed wireless communication system, the method further includes:
in response to receiving a delay adjustment instruction sent by the high-level network element equipment, determining a first delay adjustment amount according to a first position and a preset position of the first master synchronization signal;
and performing first time delay adjustment on the data to be sent according to the first time delay adjustment amount.
In some embodiments, the distributed wireless communication system delay monitoring method further comprises:
responding to the satisfaction of a preset condition, and performing second time delay adjustment on the data to be sent according to a second time delay adjustment amount configured in advance;
and responding to the received second main synchronization signals sent by a plurality of other RRUs in the same cell to perform third time delay adjustment.
In some embodiments, said making a third delay adjustment comprises:
determining a second position of each second main synchronizing signal according to a preset sampling rate, pre-configured main synchronizing signal sequence information and main synchronizing signal position information;
determining two second positions with close numerical values from the second positions of the second main synchronous signals, and selecting the second position with a smaller numerical value;
determining a third time delay adjustment amount according to the selected second position and the preset position;
and performing third time delay adjustment on the data to be sent according to the third time delay adjustment quantity.
In some embodiments, the determining the second position of each second primary synchronization signal according to a preset sampling rate, preconfigured primary synchronization signal sequence information, and primary synchronization signal position information respectively includes:
generating a third signal with a first length according to the sampling rate and the pre-configured main synchronous signal sequence information;
intercepting the second master synchronizing signal according to first position information of a pre-configured master synchronizing signal and a working system of the distributed wireless communication system to obtain a fourth signal with a third length;
and determining a second position of each second master synchronization signal according to the third signal, the fourth signal, the first length and the third length.
In another aspect, an embodiment of the present disclosure further provides a delay monitoring apparatus, including a delay monitoring module, where the delay monitoring module includes a first processing unit, a second processing unit, and an alarm unit;
the first processing unit is used for determining a first position of a first main synchronizing signal according to a preset sampling rate, pre-configured main synchronizing signal sequence information and main synchronizing signal position information, wherein the first main synchronizing signal is sent by other RRUs (radio remote units) in the same cell;
the second processing unit is used for calculating the offset time of the first master synchronization signal according to the first position, the preset position and the sampling rate of the first master synchronization signal;
and the alarm unit is used for responding to the fact that the offset time of the first main synchronous signal exceeds a pre-configured time delay range and sending a time delay alarm to high-level network element equipment in the distributed wireless communication system.
In another aspect, an embodiment of the present disclosure further provides a computer device, including: one or more processors; a storage device having one or more programs stored thereon; the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the distributed wireless communication system delay monitoring method as previously described.
In yet another aspect, the disclosed embodiments also provide a computer readable medium, on which a computer program is stored, where the program is executed to implement the distributed wireless communication system delay monitoring method as described above.
The time delay monitoring method of the distributed wireless communication system provided by the embodiment of the disclosure determines a first position of a first main synchronization signal sent by other RRUs in the same cell according to a preset sampling rate, pre-configured main synchronization signal sequence information and main synchronization signal position information; calculating the offset time of the first master synchronizing signal according to the first position, the preset position and the sampling rate of the first master synchronizing signal; responding to the deviation time exceeding the pre-configured time delay range, and sending a time delay alarm to high-level network element equipment in the distributed wireless communication system; according to the embodiment of the disclosure, the RRUs in the same cell are used for communicating the first main synchronization signal, the offset time of the first main synchronization signal is calculated according to the first position of the first main synchronization signal, the offset time and the time delay range are judged, tracking and calibration of the air interface time delay error is realized, and the time delay alarm is performed on the high-level module when the air interface time delay is determined to be larger, so that the problem that high-level network element equipment cannot sense the time delay fault can be effectively solved, and the high-level network element equipment can process the time delay fault conveniently.
Drawings
FIG. 1 is a first system architecture diagram according to an embodiment of the present disclosure;
FIG. 2 is a system architecture diagram two of an embodiment of the present disclosure;
fig. 3 is a schematic diagram of a delay adjustment principle provided in the embodiment of the present disclosure;
fig. 4 is a schematic diagram of a delay monitoring process of a distributed wireless communication system according to an embodiment of the present disclosure;
fig. 5 is a first schematic flowchart illustrating a process of determining a first position of a first primary synchronization signal according to an embodiment of the present disclosure;
fig. 6 is a second schematic flowchart illustrating a process of determining a first position of a first master synchronization signal according to an embodiment of the present disclosure;
fig. 7 is a schematic flowchart of performing delay adjustment based on an indication of a higher-layer network element device according to an embodiment of the present disclosure;
fig. 8 is a schematic flow chart of performing first and second delay adjustments according to an embodiment of the present disclosure;
fig. 9 is a schematic flow chart illustrating a third delay adjustment according to the embodiment of the disclosure;
fig. 10 is a schematic flowchart of determining a second position of each second master synchronization signal according to an embodiment of the present disclosure;
fig. 11 is a first schematic structural diagram of a delay monitoring apparatus according to an embodiment of the present disclosure;
fig. 12 is a schematic structural diagram ii of a time delay monitoring apparatus according to an embodiment of the present disclosure;
fig. 13 is a schematic structural diagram of a third time delay monitoring apparatus according to an embodiment of the present disclosure.
Detailed Description
Example embodiments will be described more fully hereinafter with reference to the accompanying drawings, but which may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," 8230; \8230 "; when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
Embodiments described herein may be described with reference to plan and/or cross-sectional views in light of idealized schematic illustrations of the disclosure. Accordingly, the example illustrations can be modified in accordance with manufacturing techniques and/or tolerances. Accordingly, the embodiments are not limited to the embodiments shown in the drawings, but include modifications of configurations formed based on a manufacturing process. Thus, the regions illustrated in the figures have schematic properties, and the shapes of the regions shown in the figures illustrate specific shapes of regions of elements, but are not intended to be limiting.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The embodiment of the present disclosure provides a delay monitoring method for a distributed wireless communication system, which may be applied to the system shown in fig. 1 or fig. 2. The system shown in fig. 1 is a distributed digital room distribution communication system, and includes a control layer, a data layer, a convergence layer, and a base layer, where the network element device of the control layer may be a control Unit, the network element device of the data layer may be a baseband Unit, the network element device of the convergence layer may be a convergence Unit, the network element device of the base layer may be a Remote Radio Unit (RRU), communication between the network element devices of each layer is possible, communication between the baseband units of the data layer is possible, and signal synchronization may also be performed between the RRUs of the base layer. The system shown in fig. 2 is a conventional distributed wireless communication system, and includes a control layer, a data layer, and a base layer, where network element devices of each layer can communicate with each other, baseband units of the data layer can communicate with each other, and RRUs of the base layer can also perform signal synchronization with each other. The delay monitoring scheme of the embodiment of the disclosure is applied to the RRU of the base layer, and the RRU implements delay monitoring (including delay monitoring and delay adjustment) to implement feedback of delay adjustment effect and guarantee accuracy of delay adjustment.
Fig. 3 is a schematic diagram of a delay adjustment principle provided in the embodiment of the present disclosure. As shown in fig. 3, for a wireless communication system, when data is transmitted by carriers of each operating system, the carriers must be aligned with a wireless frame header, so that time alignment with other systems can be ensured, and terminals accessed by different systems can communicate with each other normally. Ideally, data to be transmitted (i.e., IQ data) is aligned with the header of the radio frame, and there is no transmission delay. But the transmission delay is inevitable, and the delay adjustment is the data delay between the data to be transmitted and the wireless frame head, so that the data delay can work normally within the required time deviation range.
In a system initialization stage, the RRU receives a data packet including configuration parameters sent by a higher-layer network element device, where the configuration parameters may include the following parameters:
1. the working standard may include LTE (Long Term Evolution), NR (New Radio, new air interface), and the like;
2. time delay range G offset In ns, the delay range contains the lowest and highest values, e.g., -200,100]Indicating that the allowable delay fluctuates within this range. The lowest value and the highest value of the time delay range are relative to the wireless frame head, and have positive and negative scores, such as a value of 100ns, which indicates that the data to be sent is delayed and adjusted backwards by 100ns relative to the wireless frame head, and-200 ns indicates that the data to be sent is adjusted forwards by 200ns relative to the wireless frame head;
3. second delay adjustment T rf The unit is mus (microsecond), which is a delay value to be adjusted by the RRU and transmitted by the high-level network element equipment;
4. master synchronization signal position information L start Indicating the starting symbol position of the main synchronization signal;
5. the primary synchronization signal sequence information I represents a sequence index number used by the primary synchronization signal generation;
6. CRC (Cyclic Redundancy Check) information, which is used for data checking.
After receiving the data packet including the configuration parameters, the RRU checks the integrity and correctness of the configuration parameters, and performs CRC check to ensure the correctness of the received data packet.
The delay monitoring method of the distributed wireless communication system according to the embodiment of the present disclosure is described below with reference to fig. 4. As shown in fig. 4, the delay monitoring method for a distributed wireless communication system includes the following steps:
step 41, determining a first position of a first primary synchronization signal according to a preset sampling rate, pre-configured primary synchronization signal sequence information and primary synchronization signal position information, where the first primary synchronization signal is sent by an RRU in the same cell.
A monitoring period is preset in a time delay monitoring device (RRU), and when the monitoring period is up, time delay monitoring is started. In some embodiments, a monitoring timer may be set, where the duration of the monitoring timer is a monitoring period, and when the monitoring timer reaches, this step is started.
And sending a first main synchronization signal in a time-sharing manner according to main synchronization signal sequence information I issued by high-level network element equipment at the initial position of the radio frame header by other RRUs in the same coverage area (namely the same cell). In this step, after the RRU receives the first primary synchronization signal sent by other RRUs in the cell, the RRU performs synchronization according to a preset sampling rate C sample Pre-configured primary synchronization signal sequence information I (i.e. sequence index of primary synchronization signal) and primary synchronization signal position information L start (i.e., the starting symbol position of the primary synchronization signal), a first position N1 of the first primary synchronization signal is determined cale First position N1 cale Is the calculated actual position of the first primary synchronization signal.
And 42, calculating the offset time of the first master synchronization signal according to the first position, the preset position and the sampling rate of the first master synchronization signal.
Preset position N true Is a position specified in the communication protocol and is an ideal position of the first master synchronization signal. In this step, the first position (i.e. actual position) N1 of the first master synchronization signal obtained in step 41 is used cale A predetermined position N true (i.e. ideal position) and sampling rate C sample Calculating an offset time T of the first primary synchronization signal offset Offset by time T offset May be positive or negative, in ns (nanoseconds).
In some embodiments, the second can be calculated by the following equation (1)An offset time T of the primary synchronization signal offset ：
T offset ＝(N1 cale -N true )*(1/C sample )*10 9 (1)
And 43, responding to the fact that the offset time of the first main synchronization signal exceeds the pre-configured time delay range, and sending a time delay alarm to the high-level network element equipment in the distributed wireless communication system.
In this step, according to the time delay range G issued by the high-level network element equipment offset Offset time T to the first Master synchronization Signal offset Making a judgment if the offset time T of the first primary synchronization signal offset Out of the delay range G offset If so, sending a time delay alarm to high-level network element equipment in the distributed wireless communication system; if the offset time T of the first primary synchronization signal offset In the time delay range G offset And if so, ending the delay monitoring of the current round, and executing the step 41 when waiting for the next monitoring period to arrive.
The time delay monitoring method of the distributed wireless communication system provided by the embodiment of the disclosure determines a first position of a first main synchronization signal sent by other RRUs in the same cell according to a preset sampling rate, pre-configured main synchronization signal sequence information and main synchronization signal position information; calculating the offset time of the first main synchronous signal according to the first position, the preset position and the sampling rate of the first main synchronous signal; responding to the deviation time exceeding the pre-configured time delay range, and sending a time delay alarm to high-level network element equipment in the distributed wireless communication system; according to the embodiment of the disclosure, the RRUs in the same cell are used for communicating the first main synchronization signal, the offset time of the first main synchronization signal is calculated according to the first position of the first main synchronization signal, the offset time and the time delay range are judged, tracking and calibration of the air interface time delay error is realized, and the time delay alarm is performed on the high-level module when the air interface time delay is determined to be larger, so that the problem that high-level network element equipment cannot sense the time delay fault can be effectively solved, and the high-level network element equipment can process the time delay fault conveniently.
In some embodiments, as shown in fig. 5, the determining, according to a preset sampling rate, preconfigured primary synchronization signal sequence information and primary synchronization signal position information, a first position of a first primary synchronization signal sent by other remote radio units RRUs in a cell where the first primary synchronization signal is located (i.e. step 41), includes the following steps:
step 51, generating a first signal with a first length according to the sampling rate and the pre-configured sequence information of the primary synchronization signal.
In this step, according to the sampling rate C sample Generating a first signal S with primary synchronization signal sequence information I local First signal S local A reconstructed signal of a first primary synchronization signal having a first length L local 。
And step 52, intercepting the first primary synchronization signal according to the pre-configured primary synchronization signal position information to obtain a second signal with a second length.
In this step, the position information L is determined based on the primary synchronization signal start Intercepting the first main synchronizing signal transmitted by other RRUs in the cell, wherein the intercepted length is a second length L cell Obtaining a second signal S cell 。
Step 53, determining a first position of the first master synchronization signal according to the first signal, the second signal, the first length and the second length.
In this step, an algorithm corresponding to the working system is determined, and then the algorithm is utilized to generate a first signal S according to the first signal S local A second signal S cell A first length L local And a second length L cell Determining a first position N1 of the first master synchronization signal cale 。
In some embodiments, the primary synchronization signal position information is a start symbol position of the primary synchronization signal, and the second length L cell There are two time slots, and correspondingly, the two time slots include the time slot in which the first primary synchronization signal is located and the previous time slot of the time slot (i.e., the time slot in which the first primary synchronization signal is located).
In some embodiments, as shown in fig. 6, the determining the first position of the first primary synchronization signal according to the first signal, the second signal, the first length and the second length (i.e., step 53) includes the following steps:
and step 61, according to the first signal, the second signal, the first length and the second length, within the duration of the first length and the duration of the difference between the first length and the second length, performing signal sampling according to a sampling rate, and calculating to obtain a plurality of first data.
Taking LTE or NR operating system as an example, in some embodiments, the first data S1 is calculated according to the following formula (2):
wherein S is local Is a first signal, S cell Is the second signal, L local Is a first length, L cell Is the second length.
At L local Duration and (L) cell -L local ) Within a time duration according to a sampling rate C sample And (5) sampling the signal (namely changing the values of k and m), and calculating to obtain a group of first data S1.
And 62, performing normalization processing on each first data to obtain each second data.
In some embodiments, the second data S2 may be calculated according to the following equation (3):
S 2 ＝S 1 /(max(S 1 )) (3)
and step 63, determining third data with a numerical value larger than a preset first threshold value in each second data.
The preset first threshold may be set to 0.8, and in this step, the third data with a value greater than 0.8 in each second data S2 is determined. Since the normalization processing is performed in step 62, the values of the second data S2 and the third data are both smaller than 1.
And step 64, responding to the number of the third data being smaller than a preset second threshold, determining the first position of the first master synchronization signal according to the third data.
In some embodiments, the preset second threshold may be 3. In this step, the amount of the third data is determined, and if one or two are determinedThird data indicating that the specific position of the first master synchronization signal can be determined, the first position N1 of the first master synchronization signal is determined according to the third data cale That is, if the third data is one or two, the sampling of the signal and the calculation of the first data S1 are stopped, but the first position N1 of the first master synchronization signal is determined based on the current one of the third data cale 。
Wherein the first position N1 of the first primary synchronization signal is determined from the third data cale The detailed implementation of (1) will be described in detail later.
It should be noted that, if more than 3 third data are determined, which indicates that the specific position of the first primary synchronization signal cannot be determined, the method continues to perform step 61, changes the values of k and/or m, re-samples the signal, and re-calculates a set of first data S1, so as to determine the first position N1 of the first primary synchronization signal according to the next set of first data S1 cale 。
In some embodiments, the determining the first location of the first master synchronization signal based on the third data (i.e., step 64) includes the steps of:
in response to the third data being more than one, determining the position of the sampling signal corresponding to the larger third data, and taking the position of the sampling signal as the first position N1 of the first master synchronization signal cale . It should be noted that, usually, the second threshold is 3, that is, the third data is at most two, taking the third data as two as an example, the k value corresponding to the larger third data of the two third data is found, the sampling signal corresponding to the k value is determined, and the start symbol position of the sampling signal is the first position N1 of the first primary synchronization signal cale 。
Responding to the third data as one, determining the position of the sampling signal corresponding to the third data, and taking the position of the sampling signal as the first position N1 of the first master synchronization signal cale . Under the condition that the third data is one, finding out a k value corresponding to the third data, and determining a sampling signal corresponding to the k value, wherein the initial symbol position of the sampling signal is the first position N1 of the first master synchronization signal cale 。
In some embodiments, the offset time T of the first primary synchronization signal may be carried in the delay alarm offset . Accordingly, as shown in fig. 7, after the delay warning is sent to the higher-layer network element device in the distributed wireless communication system (i.e., step 43), the distributed wireless communication system delay monitoring method may further include the following steps:
step 71, in response to receiving the delay adjustment instruction sent by the higher-layer network element device, determining a first delay adjustment amount according to the first position and the preset position of the first primary synchronization signal.
Sending an offset time T carrying a first primary synchronization signal to a higher-layer network element device offset After the time delay alarm, the higher-level network element device may determine the offset time T according to the first primary synchronization signal offset It is determined whether to make a delay adjustment. In this step, if the high-level network element device indicates that the RRU sending the delay alarm performs the delay adjustment, the RRU performs the delay adjustment according to the first position N1 of the first primary synchronization signal cale And a preset position N true Determining a first delay adjustment amount N, wherein N = N1 cale -N true 。
And 72, performing first time delay adjustment on the data to be sent according to the first time delay adjustment amount.
In this step, the RRU adjusts the starting position of the data to be transmitted by N sampling points with respect to the wireless frame header, thereby implementing the first time delay adjustment. It should be noted that if N is a negative value, the data to be sent is adjusted forward relative to the radio frame header, and if N is a positive value, the data to be sent is adjusted backward relative to the radio frame header.
In some embodiments, in addition to performing delay adjustment based on an indication of a higher-layer network element device in the delay monitoring stage, the RRU may perform delay adjustment based on a primary synchronization signal sent by another RRU in the same cell.
Therefore, as shown in fig. 8, the delay monitoring method for a distributed wireless communication system may further include the following steps:
and 81, responding to the preset condition, and performing second time delay adjustment on the data to be transmitted according to a second time delay adjustment amount configured in advance.
In some embodiments, the preset condition satisfaction may include at least one of: and electrifying the RRU, receiving configuration parameters issued by high-level network element equipment, and changing the cell.
In this step, the RRU adjusts the starting position of the data to be transmitted by the second delay adjustment amount T with respect to the radio frame header rf And sampling points, thereby implementing a second delay adjustment.
And step 82, performing third time delay adjustment in response to receiving second main synchronization signals sent by a plurality of other RRUs in the same cell.
In the embodiment of the present disclosure, after the second delay adjustment is completed according to the configuration parameter issued by the higher-layer network element device, the third delay adjustment is continuously performed based on the second main synchronization signal sent by another RRU, where the second delay adjustment is microsecond-level adjustment, and the delay adjustment precision is low.
In some embodiments, as shown in fig. 9, the performing a third delay adjustment (i.e., step 82) includes the steps of:
and step 91, determining the second position of each second primary synchronization signal according to the preset sampling rate, the pre-configured primary synchronization signal sequence information and the primary synchronization signal position information.
And other RRUs in the same cell send second main synchronizing signals in a time-sharing manner at the initial position of the head of the wireless frame according to the main synchronizing signal sequence information I issued by the high-level network element equipment. In this step, the RRU can receive a plurality of second primary synchronization signals sent by other RRUs in the cell where the RRU is located, that is, receive a plurality of second primary synchronization signals sent by different RRUs, and respectively aim at each second primary synchronization signal according to the sampling rate C sample Primary synchronization signal sequence information I and primary synchronization signal position information L start Determining a second position N2 of the second primary synchronization signal cale . Taking the example of receiving the second primary synchronization signals sent by three RRUs, corresponding secondary synchronization signals are calculated for the three secondary synchronization signals respectivelySecond position N2 cale To obtain three second positions N2 cale1 、N2 cale2 、N2 cale3 . Second position N2 cale Is the actual position of the calculated second primary synchronization signal, and determines a second position N2 of the second primary synchronization signal cale And determining the first position N1 of the first primary synchronization signal cale The implementation process is the same, and is not described herein again.
And step 92, determining two second positions with close values from the second positions of the second main synchronous signals, and selecting the second position with a smaller value.
In this step, the second position N2 of each second master synchronization signal is determined cale (e.g., N2) cale1 、N2 cale2 、N2 cale3 ) To determine a second position (e.g., N2) where two values are close to each other cale1 And N2 cale2 ) And selecting a second position N2 having a smaller value cale-min (e.g., N2) cale1 )。
And step 93, determining a third time delay adjustment amount according to the selected second position and the preset position.
Wherein the third delay adjustment M = the second position N2 having a smaller value cale-min -a preset position N true 。
And step 94, performing third delay adjustment on the data to be transmitted according to the third delay adjustment amount.
In this step, the starting position of the data to be sent is adjusted by M sampling points relative to the wireless frame header, so as to realize third time delay adjustment, if M is a negative value, the starting position of the data to be sent is adjusted forward relative to the wireless frame header, and if M is a positive value, the starting position of the data to be sent is adjusted backward relative to the wireless frame header.
After the second time delay adjustment (i.e., coarse adjustment) is performed, the third time delay adjustment (i.e., fine adjustment) is continuously performed, so that the accuracy and stability of the time delay adjustment can be improved, and the accuracy of the time delay adjustment is ensured.
In some embodiments, as shown in fig. 10, the determining the second position of each second primary synchronization signal according to the preset sampling rate, the preconfigured primary synchronization signal sequence information and the primary synchronization signal position information (i.e. step 91) includes the following steps:
step 911, generating a third signal with the first length according to the sampling rate and the pre-configured sequence information of the primary synchronization signal.
In this step, according to the sampling rate C sample And primary synchronization signal sequence information I generates a third signal S' local Third signal S' local A reconstructed signal of a second primary synchronization signal having a first length L local 。
And 912, intercepting the second master synchronizing signal according to the first position information of the pre-configured master synchronizing signal and the working system of the distributed wireless communication system to obtain a fourth signal with a third length.
In this step, a third length L 'of the second primary synchronization signal to be intercepted is determined according to the working standard of the distributed wireless communication system' cell Third Length L 'for LTE and NR' cell Is 1 time slot. Based on the primary synchronization signal position information L start Intercepting second primary synchronization signals transmitted by other RRUs in the cell, wherein the intercepted length is a third length L' cell To obtain a fourth signal S' cell 。
Step 913, determining a second position of each second primary synchronization signal according to the third signal, the fourth signal, the first length, and the third length.
In this step, an algorithm corresponding to the working system is determined, and then the algorithm is utilized to respectively determine the working system according to the third signal S' local And a fourth signal S' cell A first length L local And a third length L' cell Determining a second position N2 of each second primary synchronization signal cale 。
The embodiment of the disclosure can be applied to distributed wireless communication systems of various working systems, such as LTE, NB-IoT (Narrow Band Internet of Things), NR, and the like. In the system initialization process, after the time delay adjustment is performed according to the configuration parameters issued by the high-level network element device, a main synchronization signal (i.e., a second main synchronization signal) is also sent between the RRUs in the same cell, the RRUs receiving the main synchronization signal determine a time delay adjustment amount (i.e., a third time delay adjustment amount) according to each main synchronization signal, and further perform the time delay adjustment based on the time delay adjustment amount, thereby effectively improving the time delay adjustment precision. The embodiment of the disclosure also performs time delay monitoring according to the monitoring period, can track the time delay adjustment effect in real time, and feeds back the relevant time delay parameters to the high-level network element equipment when the time delay is large, so that the high-level network element equipment can determine whether to perform further time delay adjustment processing.
Based on the same technical concept, an embodiment of the present disclosure further provides a time delay monitoring apparatus, as shown in fig. 11, the time delay monitoring apparatus includes a time delay monitoring module 1, and the time delay monitoring module 1 includes a first processing unit 101, a second processing unit 102, and an alarm unit 103.
The first processing unit 101 is configured to determine a first position of a first primary synchronization signal according to a preset sampling rate, pre-configured primary synchronization signal sequence information, and primary synchronization signal position information, where the first primary synchronization signal is sent by other RRUs in the same cell.
The second processing unit 102 is configured to calculate an offset time of the first master synchronization signal according to the first position of the first master synchronization signal, a preset position, and the sampling rate.
The alarm unit 103 is configured to send a delay alarm to a higher-layer network element device in the distributed wireless communication system in response to that the offset time of the first primary synchronization signal exceeds a preconfigured delay range.
In some embodiments, the first processing unit 101 is configured to generate a first signal of a first length according to the sampling rate and preconfigured primary synchronization signal sequence information; intercepting the first main synchronous signal according to the position information of the main synchronous signal configured in advance to obtain a second signal with a second length; determining a first position of the first master synchronization signal according to the first signal, the second signal, the first length, and the second length.
In some embodiments, the primary synchronization signal position information is a starting symbol position of the primary synchronization signal, and the second length is two time slots, where the two time slots include a time slot in which the first primary synchronization signal is located and a time slot before the time slot.
In some embodiments, the first processing unit 101 is configured to, according to the first signal, the second signal, the first length, and the second length, perform signal sampling according to the sampling rate within a duration of the first length and a duration of a difference between the first length and the second length, and calculate a plurality of first data; normalizing each first data to obtain each second data; determining third data with a numerical value larger than a preset first threshold value in the second data; and in response to the number of the third data being smaller than a preset second threshold, determining a first position of the first master synchronization signal according to the third data.
In some embodiments, the first processing unit 101 is configured to, in response to that the third data is greater than one, determine a position of a sampling signal corresponding to the larger one of the third data, and use the position of the sampling signal as the first position of the first master synchronization signal; and in response to the third data being one, determining the position of the sampling signal corresponding to the third data, and using the position of the sampling signal as the first position of the first master synchronization signal.
In some embodiments, the delay alarm carries an offset time of the first primary synchronization signal. As shown in fig. 12, the delay monitoring apparatus further includes a first delay adjusting module 2, where the first delay adjusting module 2 is configured to, after the alarm unit 103 sends a delay alarm to a higher-layer network element device in the distributed wireless communication system, determine a first delay adjustment amount according to a first position and a preset position of the first master synchronization signal in response to receiving a delay adjustment instruction sent by the higher-layer network element device; and performing first time delay adjustment on the data to be transmitted according to the first time delay adjustment quantity.
In some embodiments, as shown in fig. 13, the delay monitoring apparatus further includes a second delay adjusting module 3, where the second delay adjusting module 3 includes a first adjusting unit 301 and a second adjusting unit 302, and the first adjusting unit 301 is configured to, in response to that a preset condition is met, perform a second delay adjustment on data to be transmitted according to a second delay adjustment amount configured in advance.
The second adjusting unit 302 is configured to perform a third delay adjustment in response to receiving a second primary synchronization signal sent by multiple other RRUs in the same cell.
In some embodiments, the second adjusting unit 302 is configured to determine a second position of each second primary synchronization signal according to a preset sampling rate, pre-configured primary synchronization signal sequence information, and primary synchronization signal position information, respectively; determining two second positions with close numerical values from the second positions of the second main synchronous signals, and selecting the second position with a smaller numerical value;
determining a third time delay adjustment amount according to the selected second position and the preset position; and performing third time delay adjustment on the data to be sent according to the third time delay adjustment quantity.
In some embodiments, the second adjusting unit 302 is configured to generate a third signal with a first length according to the sampling rate and preconfigured primary synchronization signal sequence information; intercepting the second master synchronizing signal according to first position information of a pre-configured master synchronizing signal and a working system of the distributed wireless communication system to obtain a fourth signal with a third length; and determining a second position of each second master synchronization signal according to the third signal, the fourth signal, the first length and the third length.
An embodiment of the present disclosure further provides a computer device, including: one or more processors and storage; the storage device stores one or more programs, and when the one or more programs are executed by the one or more processors, the one or more processors implement the delay monitoring method of the distributed wireless communication system according to the foregoing embodiments.
The disclosed embodiments also provide a computer readable medium, on which a computer program is stored, where the computer program is executed to implement the distributed wireless communication system delay monitoring method provided in the foregoing embodiments.
It will be understood by those of ordinary skill in the art that all or some of the steps of the methods, functional modules/units in the apparatus, disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
Example embodiments have been disclosed herein, and although specific terms are employed, they are used and should be interpreted in a generic and descriptive sense only and not for purposes of limitation. In some instances, features, characteristics and/or elements described in connection with a particular embodiment may be used alone or in combination with features, characteristics and/or elements described in connection with other embodiments, unless expressly stated otherwise, as would be apparent to one skilled in the art. It will, therefore, be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention encompassed by the appended claims.
Claims (12)
1. A method for delay monitoring in a distributed wireless communication system, the method comprising:
determining a first position of a first main synchronizing signal according to a preset sampling rate, pre-configured main synchronizing signal sequence information and main synchronizing signal position information, wherein the first main synchronizing signal is sent by other RRUs in the same cell;
calculating the offset time of the first master synchronization signal according to the first position, the preset position and the sampling rate of the first master synchronization signal;
and responding to the deviation time of the first main synchronous signal exceeding a pre-configured time delay range, and sending a time delay alarm to higher-layer network element equipment in the distributed wireless communication system.
2. The method of claim 1, wherein the determining a first position of a first primary synchronization signal sent by another remote radio unit RRU in a cell according to a preset sampling rate, preconfigured primary synchronization signal sequence information and primary synchronization signal position information comprises:
generating a first signal with a first length according to the sampling rate and pre-configured main synchronous signal sequence information;
intercepting the first main synchronous signal according to the position information of the main synchronous signal configured in advance to obtain a second signal with a second length;
determining a first position of the first master synchronization signal according to the first signal, the second signal, the first length, and the second length.
3. The method of claim 2, wherein the primary synchronization signal position information is a starting symbol position of the primary synchronization signal, and the second length is two time slots, wherein the two time slots include a time slot in which the first primary synchronization signal is located and a time slot before the time slot.
4. The method of claim 2, wherein said determining a first position of the first primary synchronization signal based on the first signal, the second signal, the first length, and the second length comprises:
according to the first signal, the second signal, the first length and the second length, within the duration of the first length and the duration of the difference between the first length and the second length, signal sampling is carried out according to the sampling rate, and a plurality of first data are obtained through calculation;
normalizing each first data to obtain each second data;
determining third data with a numerical value larger than a preset first threshold value in the second data;
and in response to the number of the third data being smaller than a preset second threshold, determining a first position of the first master synchronization signal according to the third data.
5. The method of claim 4, wherein said determining a first location of the first primary synchronization signal from the third data comprises:
in response to the third data being more than one, determining the position of the sampling signal corresponding to the larger one of the third data, and taking the position of the sampling signal as the first position of the first master synchronization signal;
and in response to the third data being one, determining the position of the sampling signal corresponding to the third data, and using the position of the sampling signal as the first position of the first master synchronization signal.
6. The method of claim 1, wherein the delay alarm carries an offset time of the first primary synchronization signal, and after the delay alarm is sent to a higher layer network element device in a distributed wireless communication system, the method further comprises:
in response to receiving a delay adjustment instruction sent by the high-level network element equipment, determining a first delay adjustment amount according to a first position and a preset position of the first master synchronization signal;
and performing first time delay adjustment on the data to be sent according to the first time delay adjustment amount.
7. The method of any one of claims 1-6, further comprising:
responding to the satisfaction of a preset condition, and performing second time delay adjustment on the data to be sent according to a second time delay adjustment amount configured in advance;
and performing third time delay adjustment in response to receiving second main synchronization signals sent by a plurality of other RRUs in the same cell.
8. The method of claim 7, wherein the making a third delay adjustment comprises:
determining a second position of each second main synchronizing signal according to a preset sampling rate, pre-configured main synchronizing signal sequence information and main synchronizing signal position information;
determining two second positions with close numerical values from the second positions of the second main synchronous signals, and selecting the second position with a smaller numerical value;
determining a third time delay adjustment amount according to the selected second position and the preset position;
and performing third time delay adjustment on the data to be sent according to the third time delay adjustment quantity.
9. The method as claimed in claim 8, wherein said determining the second position of each of the second primary synchronization signals according to the preset sampling rate, the pre-configured primary synchronization signal sequence information and the primary synchronization signal position information, respectively, comprises:
generating a third signal with a first length according to the sampling rate and pre-configured main synchronous signal sequence information;
intercepting the second master synchronizing signal according to first position information of a pre-configured master synchronizing signal and a working system of the distributed wireless communication system to obtain a fourth signal with a third length;
and determining a second position of each second master synchronization signal according to the third signal, the fourth signal, the first length and the third length.
10. A time delay monitoring device is characterized by comprising a time delay monitoring module, wherein the time delay monitoring module comprises a first processing unit, a second processing unit and an alarm unit;
the first processing unit is used for determining a first position of a first main synchronizing signal according to a preset sampling rate, pre-configured main synchronizing signal sequence information and main synchronizing signal position information, wherein the first main synchronizing signal is sent by other RRUs in the same cell;
the second processing unit is used for calculating the offset time of the first master synchronization signal according to the first position, the preset position and the sampling rate of the first master synchronization signal;
and the alarm unit is used for responding to the fact that the offset time of the first main synchronization signal exceeds a pre-configured delay range and sending a delay alarm to high-level network element equipment in the distributed wireless communication system.
11. A computer device, comprising:
one or more processors;
a storage device having one or more programs stored thereon;
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the distributed wireless communication system delay monitoring method of any of claims 1-9.
12. A computer readable medium having stored thereon a computer program, wherein the program when executed implements a distributed wireless communication system delay monitoring method as claimed in any of claims 1-9.
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