CN111182566B - Method and device for adjusting uplink time delay, base station and storage medium - Google Patents
Method and device for adjusting uplink time delay, base station and storage medium Download PDFInfo
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- CN111182566B CN111182566B CN201911420967.4A CN201911420967A CN111182566B CN 111182566 B CN111182566 B CN 111182566B CN 201911420967 A CN201911420967 A CN 201911420967A CN 111182566 B CN111182566 B CN 111182566B
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Abstract
The application relates to an adjustment method, a device, a base station and a storage medium of uplink time delay, wherein the base station receives an uplink signal sent by User Equipment (UE) in a current adjustment period; then, adjusting the uplink time delay of the uplink signal according to a preset processing time delay calibration value; and the processing time delay calibration value is obtained according to the timing advance TA of the historical UE monitored in the previous adjustment period. By adopting the method, the fluctuation of the uplink time delay of the uplink signal in the negative time delay direction can be reduced, the receiving performance of the base station is favorably improved, the debugging of the base station is more smooth, and the debugging time and the research and development cost are reduced.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a method, an apparatus, a base station, and a storage medium for adjusting uplink delay.
Background
Currently, communication technologies based on Long Term Evolution (LTE) or New Radio (NR) all employ an orthogonal multiple access technology. In order to control the time when uplink signals of different terminals (User Equipment, abbreviated as UE) reach the base station, a baseband processing unit in the base station may set a Timing Advance (TA) of the UE, and control the UE to send the uplink signals in Advance according to the TA, so that the uplink signals reach the baseband processing unit at a specified time after being transmitted.
In an actual transmission process, an uplink signal sent by the UE based on the TA is subjected to spatial propagation to generate propagation delay, and the uplink signal is also processed by the baseband processing unit, and a certain hardware processing delay also exists in the processing process. That is, the uplink delay experienced by the uplink signal when the uplink signal is transmitted from the UE to the baseband processing unit includes propagation delay and hardware processing delay. Therefore, in the debugging process, in order to reduce the influence of the hardware processing process on the uplink delay, the baseband processing unit usually sets a fixed delay calibration value for compensation, and determines the receiving boundary of the uplink signal according to the delay calibration value to ensure the block integrity of the uplink signal.
However, due to the difference in the consistency of hardware boards of different base stations, there is a difference in hardware processing delay, or processing delay and power-on delay jitter of a Programmable integrated circuit (FPGA for short) in a fronthaul unit may cause fluctuation in a receiving boundary of an uplink signal, which affects the integrity of a data block, so that the performance of demodulating and decoding data is reduced, normal reception of the uplink signal is affected, and the debugging time and the development cost are increased.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a method, an apparatus, a base station, and a storage medium for adjusting uplink delay.
A method for adjusting uplink time delay comprises the following steps:
receiving an uplink signal sent by User Equipment (UE) in a current adjustment period;
adjusting the uplink time delay of the uplink signal according to a preset processing time delay calibration value; the processing time delay calibration value is obtained according to the timing advance TA of the historical UE monitored in the last adjustment period.
In one embodiment, the method further includes:
acquiring a timing advance TA (timing advance) and UE access quality information of historical UE (user equipment) corresponding to each historical access request in a previous adjustment period;
screening all acquired TAs according to the UE access quality information to acquire a plurality of candidate TAs meeting the preset access requirement;
and determining a target TA based on the candidate TAs, and adjusting the currently stored processing time delay calibration value according to the target TA.
In one embodiment, the adjusting the currently stored processing delay calibration value according to the target TA includes:
calculating the difference value of the target TA and a preset TA reference value; the TA reference value is determined according to the variation range of processing time delay generated by processing the uplink signal in the history period by the base station;
and adjusting the currently stored processing time delay calibration value according to the difference value.
In one embodiment, the adjusting the currently stored processing delay calibration value according to the difference value includes:
and if the difference is smaller than zero, increasing the absolute value of the difference on the currently stored processing delay calibration value.
In one embodiment, the determining the target TA based on a plurality of candidate TAs includes:
and averaging the candidate TAs to obtain the target TA.
In one embodiment, the averaging process for multiple candidate TAs includes:
and under the condition that the number of the candidate TAs is larger than a preset number threshold, carrying out average processing on the candidate TAs.
In one embodiment, the averaging process for multiple candidate TAs includes:
the maximum TA and the minimum TA among the candidate TAs are removed, and an average value of the remaining candidate TAs is calculated.
In one embodiment, the UE access quality information includes a received signal to noise ratio SNR and a received signal strength RSSI; screening all acquired TAs according to the UE access quality information to acquire a plurality of candidate TAs meeting the preset access requirement, wherein the method comprises the following steps: and when the SNR is greater than a preset signal-to-noise ratio threshold and the RSSI is greater than a preset signal strength threshold, determining the TA corresponding to the UE access quality information as a candidate TA.
An uplink delay adjusting apparatus, the apparatus comprising:
a receiving module, configured to receive an uplink signal sent by a user equipment UE in a current adjustment period;
the adjusting module is used for adjusting the uplink time delay of the uplink signal according to a preset processing time delay calibration value; wherein, the processing time delay calibration value is obtained according to the timing advance TA of the historical UE monitored in the last adjustment period.
A base station comprises a memory and a processor, wherein the memory stores a computer program, and the processor realizes the steps of the uplink time delay adjusting method when executing the computer program.
A computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method for adjusting uplink latency.
According to the method, the device, the base station and the storage medium for adjusting the uplink time delay, the base station receives an uplink signal sent by User Equipment (UE) in a current adjustment period; then, adjusting the uplink time delay of the uplink signal according to a preset processing time delay calibration value; and the processing time delay calibration value is obtained according to the timing advance TA of the UE monitored in the previous adjustment period. Because the processing delay calibration value is obtained according to the TA of the historical UE monitored in the previous adjustment period, when the hardware processing delay of the base station has large fluctuation, the base station can determine an accurate processing delay calibration value through the TA of the historical UE, so that the uplink delay of the uplink signal received in the current adjustment period is adjusted according to the accurate processing delay calibration value, when the adjusted uplink signal reaches the coding and decoding processing module in the baseband processing unit, the fluctuation in the negative delay direction can be reduced, the receiving performance of the base station is improved, the base station is debugged more smoothly, and the debugging time and the research and development cost are reduced.
Drawings
Fig. 1 is an application environment diagram of an uplink delay adjustment method in an embodiment;
fig. 2 is a schematic flow chart of a method for adjusting uplink delay in an embodiment;
fig. 3 is a schematic flow chart of a method for adjusting uplink delay in another embodiment;
fig. 4 is a schematic flowchart of a method for adjusting uplink delay in another embodiment;
fig. 5 is a block diagram of an uplink delay adjusting apparatus in an embodiment;
fig. 6 is a block diagram of an uplink delay adjusting apparatus in another embodiment;
fig. 7 is a block diagram of an uplink delay adjusting apparatus in another embodiment;
fig. 8 is an internal structural diagram of a base station in one 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 adjusting the uplink delay provided by the application can be applied to the application environment shown in fig. 1. Wherein the UE100 communicates with the base station 200 through a network. The UE100 may be, but not limited to, various personal computers, notebook computers, smart phones, tablet computers, and portable wearable devices, and the Base Station 200 may be, but not limited to, a Base Station device of macro Base Station, micro Base Station, and small Base Station, and may be a Base Station (BTS) in Global System for Mobile communications (GSM) or Code Division Multiple Access (CDMA), a Base Station (NB) in Wideband Code Division Multiple Access (WCDMA), an evolved Node B (eNB or eNodeB) in LTE, or a relay Station or Access point, or a Base Station and a Customer Premise Equipment (CPE) in a future 5G network, and is not limited herein.
In one embodiment, as shown in fig. 2, a method is provided, which is described by taking the method as an example for being applied to the base station in fig. 1, and includes:
s101, receiving an uplink signal sent by User Equipment (UE) in a current regulation period.
The adjusting period is a period set in the base station and used for adjusting a processing delay calibration value, and the processing delay calibration value is used for adjusting uplink delay of an uplink signal.
The adjustment period may be 5 minutes or 3 minutes, and may be adjusted according to the actual operation condition of the base station, which is not limited herein.
The UE may be a mobile phone terminal, or may be other communication equipment accessing to a base station, and is not limited herein.
S102, adjusting the uplink time delay of the uplink signal according to a preset processing time delay calibration value; and the processing time delay calibration value is obtained according to the timing advance TA of the historical UE monitored in the previous adjustment period.
The uplink delay refers to a time period from the UE sending end to the base band processing unit of the base station starting to perform Inverse Fast Fourier Transform (IFFT) processing on the uplink signal. An uplink signal sent by the UE generates propagation delay through spatial propagation, and then generates a certain hardware link processing delay and a signal processing delay and a power-on delay jitter error of a Programmable integrated circuit (FPGA for short) in a fronthaul unit in the processes of antenna reception, radio frequency processing, and the like.
After the base station configures the time domain resources for the UE through resource scheduling, the UE needs to send an uplink signal in advance according to the uplink advance indicated by the base station, so that the uplink signal reaches the baseband processing unit according to a target time corresponding to the time domain resources. Due to the consistency difference of hardware in different base station equipment, processing delay errors exist, and processing delay and power-on delay jitter errors of signals by a front-end unit (FPGA), the base station can calibrate uplink delay by setting a processing delay calibration value; that is, the uplink delay of the uplink signal includes propagation delay, hardware processing delay, and processing delay of the signal by a forwarding unit (FPGA) and a power-on delay jitter error.
Under the condition that the processing delay calibration value is a fixed value, the hardware processing delay fluctuation is large due to the inconsistency of hardware equipment, and the power-on delay jitter error of a forwarding unit (FPGA); in the repeated power-on process of the base station, an error exists in the determination of the boundary of the uplink signal, and the tail data of the previous signal can be intercepted, so that the positive time delay is generated; the header data of the next block of data may also be truncated, resulting in a negative latency. When the negative delay is large, the data blocks of part of the uplink signals cannot be processed normally, so that the receiving performance of the base station is reduced, and the debugging progress of the base station is affected.
Therefore, the processing delay calibration value is adjusted according to the timing advance TA of the historical UE monitored in the previous adjustment period. The base station may obtain the random access request received in the previous adjustment period, then obtain the timing advance TA of the historical UE according to the random access request, and then analyze and calculate the TA of the historical UE to obtain the processing delay calibration value.
The random access request may be a multiple access request sent by one historical UE to the base station, or may be sent by different historical UEs, which is not limited herein.
Specifically, the base station may perform statistical analysis on all TAs to obtain a processing delay calibration value; or screening the TA by combining other parameters, and then performing statistical analysis to process the time delay calibration value; and are not limited herein.
Specifically, when the base station obtains the processing delay calibration value according to the statistical analysis result, the base station may determine an adjustment amount for the processing delay calibration value according to the statistical analysis result, and then adjust the processing delay calibration value on the basis of the current processing delay calibration value; alternatively, a new processing delay calibration value may be directly determined according to the statistical analysis result, which is not limited herein. The base station obtains the processing delay calibration value according to the TA monitored in the last adjustment period, so that the processing delay calibration value can more accurately adjust the uplink delay of the uplink signal.
When the base station adjusts the uplink time delay of the uplink signal according to the processing time delay calibration value, the boundary of the uplink signal can be redefined according to the processing time delay calibration value, the integrity of the current uplink signal block is ensured as much as possible, and the negative time delay fluctuation size is reduced.
In the method for adjusting the uplink time delay, the base station receives an uplink signal sent by the User Equipment (UE) in the current adjustment period; then, adjusting the uplink time delay of the uplink signal according to a preset processing time delay calibration value; and the processing time delay calibration value is obtained according to the timing advance TA of the historical UE monitored in the previous adjustment period. Because the processing delay calibration value is obtained according to the monitored TA of the historical UE in the previous adjustment period, when the hardware processing delay of the base station has large fluctuation, the base station can determine the accurate processing delay calibration value through the TA of the historical UE, so that the uplink delay of the uplink signal received in the current adjustment period is adjusted according to the accurate processing delay calibration value, when the adjusted uplink signal reaches the coding and decoding processing module in the baseband processing unit, the fluctuation in the negative delay direction can be reduced, the receiving performance of the base station is improved, the base station is debugged more smoothly, and the debugging time length and the research and development cost are reduced.
Fig. 3 is a schematic flow chart of an uplink delay adjustment method in another embodiment, which relates to a manner for a base station to determine a processing delay calibration value, and based on the foregoing embodiment, as shown in fig. 3, the foregoing method further includes:
s201, acquiring a timing advance TA of the UE corresponding to each historical access request in the last adjustment period and UE access quality information.
Specifically, when determining the processing delay calibration value according to the TA, the base station may determine the processing delay calibration value by combining UE access quality information corresponding to the TA. The UE access quality information may be access power of the UE, or an error rate of an uplink signal corresponding to the UE, and is not limited herein.
After receiving the random access request sent by the UE in the last adjustment period, the base station may determine the TA of the UE based on the random access request, and may measure the access quality information of the UE.
S202, all the obtained TAs are screened according to the UE access quality information, and a plurality of candidate TAs meeting the preset access requirements are obtained.
Further, the base station may screen all TAs according to the UE access quality information to obtain a plurality of candidate TAs that satisfy the access requirement. That is to say, when the base station considers that the UE access quality information meets the preset access requirement, the screened candidate TA can more accurately represent the positive and negative deviations of the uplink delay. For example, when the access quality information of the UE corresponding to the random access request 1 meets the preset access requirement corresponding to N random access requests in the last adjustment period, the TA of the UE corresponding to the random access request 1 is determined to be a candidate TA.
Specifically, the base station may perform screening according to one measurement result in the UE access quality information, for example, the access power of the UE, or may perform screening jointly in combination with multiple types of measurement results, and the screening manner is not limited herein.
Optionally, the UE access quality information includes a received signal to noise ratio SNR, and a received signal strength RSSI. The base station may determine, as the candidate TA, the TA corresponding to the UE access quality information when the SNR is greater than the preset signal-to-noise ratio threshold and the RSSI is greater than the preset signal strength threshold.
S203, determining a target TA based on the candidate TAs, and adjusting the currently stored processing time delay calibration value according to the target TA.
Further, when the base station determines the target TA according to the multiple candidate TAs, the base station may perform averaging processing on the multiple candidate TAs, or may perform weighted summation on the multiple candidate TAs; in addition, the base station may further compare with other values based on the average of the multiple candidate TAs to determine the final target TA, which is not limited herein.
Optionally, the base station may also count the number of candidate TAs, and perform averaging processing on multiple candidate TAs when the number of candidate TAs is greater than a preset number threshold.
When the base station performs averaging processing on the plurality of candidate TAs, the base station may perform weighted averaging on the candidate TAs, or may perform arithmetic averaging on the candidate TAs, which is not limited herein.
Alternatively, the base station may remove the maximum TA and the minimum TA of the candidate TAs, and then calculate the average value of the remaining candidate TAs to determine the candidate TAs as the target TA.
After the target TA is determined, an adjustment may be made to the currently stored processing delay calibration value according to the target TA. Specifically, the base station may add a corresponding delay value to the currently stored processing delay calibration according to the target TA, or may determine different adjustment modes according to the size of the target TA, which is not limited herein.
According to the method for adjusting the uplink time delay, when the base station determines the processing time delay calibration value according to the TA of the UE monitored in the previous adjustment period, all the TAs can be screened according to the UE access quality information corresponding to the TA to obtain candidate TAs, and the processing time delay calibration value is determined according to the candidate TAs, so that the processing time delay calibration value can be more accurate and can be more suitable for the current operation state of the base station.
Fig. 4 is a schematic flowchart of an adjustment method of uplink delay in another embodiment, where the present embodiment relates to a manner in which a base station adjusts a currently stored processing delay calibration value according to a target TA, and on the basis of the foregoing embodiment, as shown in fig. 4, the foregoing S203 includes:
s301, calculating a difference value between a target TA and a preset TA reference value; the TA reference value is determined according to the variation range of the processing time delay generated by processing the uplink signal in the history period by the base station.
Specifically, when the base station adjusts the currently stored processing delay calibration value according to the target TA, the target TA may be subtracted from a preset TA reference value to obtain a difference value. The TA reference value is determined according to the variation range of the processing time delay generated by the base station processing the uplink signal in the history period.
When the difference value between the target TA and the TA reference value is less than zero, the base station considers that the negative time delay fluctuation in the uplink time delay of the uplink signal in the previous adjustment period is larger, namely the probability that the time of the uplink signal reaching the coding and decoding module is before the target time indicated by the base station is larger; when the difference between the target TA and the TA reference value is greater than zero, the base station considers that the fluctuation of the positive time delay in the uplink time delay of the uplink signal in the previous adjustment period is large, that is, the probability that the time when the uplink signal reaches the coding and decoding module falls behind the target time indicated by the base station is large.
And S302, adjusting the currently stored processing time delay calibration value according to the difference value.
Further, the base station may adjust the current storage amount processing delay calibration value according to the difference value. Specifically, the base station may subtract the difference value based on the currently stored processing delay calibration value, or may select different adjustment modes according to positive and negative attributes of the difference value, which is not limited herein.
Alternatively, if the difference is less than zero, the base station may increase the absolute value of the difference over the currently stored processing delay calibration value. Correspondingly, if the difference is greater than or equal to zero, the base station may choose not to adjust the currently stored processing delay calibration value in order to avoid a large fluctuation in the negative delay direction.
In the method for adjusting the uplink delay, the TA reference value in the base station is determined based on the variation range of the processing delay generated by processing the uplink signal in the historical period, and the currently stored processing delay calibration value is adjusted according to the difference between the target TA and the TA reference value, so that the processing delay calibration value can better conform to the processing delay fluctuation condition of each hardware device in the base station, and the uplink delay of the uplink signal is more accurately adjusted.
It should be understood that although the various steps in the flow charts of fig. 2-4 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 some of the steps in fig. 2-4 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 alternating with other steps or at least some of the sub-steps or stages of other steps.
In an embodiment, as shown in fig. 5, there is provided an uplink delay adjusting apparatus, including: a receiving module 10 and an adjusting module 20, wherein:
a receiving module 10, configured to receive an uplink signal sent by a user equipment UE in a current adjustment period;
an adjusting module 20, configured to adjust an uplink delay of the uplink signal according to a preset processing delay calibration value; and the processing time delay calibration value is obtained according to the monitored timing advance of the historical UE in the last adjustment period.
The uplink delay adjusting device provided in the embodiment of the present application can implement the method embodiment, and the implementation principle and the technical effect are similar, which are not described herein again.
In an embodiment, on the basis of the above embodiment, as shown in fig. 6, the above apparatus further includes:
an obtaining module 30, configured to obtain a timing advance TA and UE access quality information of a historical UE corresponding to each historical access request in a previous adjustment period;
the screening module 40 is configured to screen all acquired TAs according to the UE access quality information to obtain a plurality of candidate TAs that meet a preset access requirement;
a determining module 50, configured to determine a target TA based on multiple candidate TAs, and adjust a currently stored processing delay calibration value according to the target TA.
In an embodiment, on the basis of the above embodiment, as shown in fig. 7, the above determining module 50 includes:
a calculating unit 501, configured to calculate a difference between a target TA and a preset TA reference value; the TA reference value is determined according to the variation range of processing time delay generated by processing the uplink signal in the history period by the base station;
an adjusting unit 502, configured to adjust the currently stored processing delay calibration value according to the difference.
In an embodiment, on the basis of the foregoing embodiment, the foregoing adjusting unit 502 is specifically configured to: and if the difference is smaller than zero, increasing the absolute value of the difference on the currently stored processing delay calibration value.
In an embodiment, on the basis of the above embodiment, the determining module 50 is specifically configured to: and averaging the candidate TAs to obtain the target TA.
In an embodiment, on the basis of the above embodiment, the determining module 50 is specifically configured to: and under the condition that the number of the candidate TAs is larger than a preset number threshold value, carrying out average processing on the candidate TAs.
In an embodiment, on the basis of the above embodiment, the determining module 50 is specifically configured to: the maximum TA and the minimum TA among the candidate TAs are removed, and the average value of the remaining candidate TAs is calculated.
In one embodiment, on the basis of the above embodiment, the UE access quality information includes a received signal-to-noise ratio (SNR) and a Received Signal Strength (RSSI); the screening module 40 is specifically configured to: and when the SNR is greater than a preset signal-to-noise ratio threshold and the RSSI is greater than a preset signal strength threshold, determining the TA corresponding to the UE access quality information as a candidate TA.
The uplink delay adjusting device provided in the embodiment of the present application can implement the method embodiment, and the implementation principle and the technical effect are similar, which are not described herein again.
For specific limitation of the uplink delay adjusting device, reference may be made to the above limitation on the uplink delay adjusting method, and details are not described here. All or part of each module in the uplink delay adjusting device can be realized 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, or can 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 base station is provided, the internal structure of which may be as shown in fig. 8. The base station includes a processor, memory, a network interface, and a database connected by a system bus. Wherein the processor of the base station is configured to provide computational and control capabilities. The memory of the base station 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 operating system and the computer program to run in the non-volatile storage medium. The database of the base station is used for storing the adjustment data of the uplink time delay. The network interface of the base station is used for communicating with an external terminal through network connection. The computer program is executed by a processor to implement a method for adjusting uplink delay.
Those skilled in the art will appreciate that the architecture shown in fig. 8 is a block diagram of only a portion of the architecture associated with the subject application and is not intended to limit the base stations to which the subject application applies, and that a particular base station may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, there is provided a base station comprising a memory and a processor, the memory having stored therein a computer program, the processor when executing the computer program implementing the steps of:
receiving an uplink signal sent by User Equipment (UE) in a current adjustment period;
adjusting the uplink time delay of the uplink signal according to a preset processing time delay calibration value; the processing time delay calibration value is obtained according to the timing advance TA of the historical UE monitored in the last adjustment period.
In one embodiment, the processor, when executing the computer program, further performs the steps of: acquiring a timing advance TA (timing advance) of historical UE (user equipment) corresponding to each historical access request in a previous adjusting period and UE access quality information; screening all acquired TAs according to the UE access quality information to acquire a plurality of candidate TAs meeting the preset access requirement; and determining a target TA based on the candidate TAs, and adjusting the currently stored processing delay calibration value according to the target TA.
In one embodiment, the processor, when executing the computer program, further performs the steps of: calculating a difference value between the target TA and a preset TA reference value; the TA reference value is determined according to the variation range of processing time delay generated by processing the uplink signal in the history period by the base station; and adjusting the currently stored processing time delay calibration value according to the difference value.
In one embodiment, the processor, when executing the computer program, further performs the steps of: and if the difference is smaller than zero, increasing the absolute value of the difference on the currently stored processing delay calibration value.
In one embodiment, the processor, when executing the computer program, further performs the steps of: and averaging the candidate TAs to obtain the target TA.
In one embodiment, the processor, when executing the computer program, further performs the steps of: and under the condition that the number of the candidate TAs is larger than a preset number threshold value, carrying out average processing on the candidate TAs.
In one embodiment, the processor, when executing the computer program, further performs the steps of: the maximum TA and the minimum TA among the candidate TAs are removed, and an average value of the remaining candidate TAs is calculated.
In one embodiment, the UE access quality information includes a received signal to noise ratio, SNR, and a received signal strength, RSSI; the processor, when executing the computer program, further performs the steps of: and when the SNR is greater than a preset signal-to-noise ratio threshold and the RSSI is greater than a preset signal strength threshold, determining the TA corresponding to the UE access quality information as a candidate TA.
The implementation principle and technical effect of the base station provided in this embodiment are similar to those of the above method embodiments, and are not described herein again.
In one embodiment, a computer-readable storage medium is provided, having stored thereon a computer program which, when executed by a processor, performs the steps of:
receiving an uplink signal sent by User Equipment (UE) in a current adjustment period;
adjusting the uplink time delay of the uplink signal according to a preset processing time delay calibration value; the processing time delay calibration value is obtained according to the timing advance TA of the historical UE monitored in the last adjustment period.
In one embodiment, the computer program when executed by the processor further performs the steps of: acquiring a timing advance TA (timing advance) and UE access quality information of historical UE (user equipment) corresponding to each historical access request in a previous adjustment period; screening all acquired TAs according to the UE access quality information to acquire a plurality of candidate TAs meeting the preset access requirement; a target TA is determined based on the plurality of candidate TAs, and a currently stored processing delay calibration value is adjusted according to the target TA.
In one embodiment, the computer program when executed by the processor further performs the steps of: calculating a difference value between the target TA and a preset TA reference value; the TA reference value is determined according to the variation range of processing time delay generated by processing the uplink signal in the history period by the base station; and adjusting the currently stored processing time delay calibration value according to the difference value.
In one embodiment, the computer program when executed by the processor further performs the steps of: and if the difference is smaller than zero, increasing the absolute value of the difference on the currently stored processing delay calibration value.
In one embodiment, the computer program when executed by the processor further performs the steps of: and carrying out average processing on the plurality of candidate TAs to obtain the target TA.
In one embodiment, the computer program when executed by the processor further performs the steps of: and under the condition that the number of the candidate TAs is larger than a preset number threshold value, carrying out average processing on the candidate TAs.
In one embodiment, the computer program when executed by the processor further performs the steps of: the maximum TA and the minimum TA among the candidate TAs are removed, and an average value of the remaining candidate TAs is calculated.
In one embodiment, the UE access quality information includes a received signal to noise ratio, SNR, and a received signal strength, RSSI; the computer program when executed by the processor further realizes the steps of: and when the SNR is greater than a preset signal-to-noise ratio threshold and the RSSI is greater than a preset signal strength threshold, determining the TA corresponding to the UE access quality information as a candidate TA.
The implementation principle and technical effect of the computer-readable storage medium provided by this embodiment are similar to those of the above-described method embodiment, and are not described herein again.
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 application shall be subject to the appended claims.
Claims (10)
1. A method for adjusting uplink time delay is applied to a base station, and the method comprises the following steps:
receiving an uplink signal sent by User Equipment (UE) in a current adjustment period;
adjusting the uplink time delay of the uplink signal according to a preset processing time delay calibration value so that the uplink signal reaches a baseband processing unit at a specified time; the processing time delay calibration value is obtained according to the timing advance TA of the historical UE monitored in the last adjustment period; the uplink time delay comprises hardware processing time delay in a base station, signal processing time delay of a forward transmission unit and power-on time delay jitter error; the historical UE is a plurality of historical UEs which send access requests to the base station in the last adjustment period;
the method further comprises the following steps:
determining a target TA based on a plurality of candidate TAs in the TAs of the historical UE;
calculating the difference value of the target TA and a preset TA reference value; the TA reference value is determined according to the variation range of processing time delay generated by processing the uplink signal in the history period by the base station; the target TA is determined according to a plurality of candidate TAs in a plurality of historical UE TAs;
if the difference value is smaller than zero, increasing the absolute value of the difference value on the currently stored processing delay calibration value;
and if the difference value is larger than or equal to zero, not adjusting the currently stored processing delay calibration value.
2. The method for adjusting uplink delay according to claim 1, further comprising:
acquiring a timing advance TA (timing advance) and UE access quality information of historical UE (user equipment) corresponding to each historical access request in a previous adjustment period;
and screening all the obtained TA according to the UE access quality information to obtain a plurality of candidate TA meeting the preset access requirement.
3. The method according to claim 2, wherein the determining the target TA based on the candidate TAs comprises:
and carrying out average processing on the candidate TAs to obtain the target TA.
4. The method according to claim 3, wherein the averaging the candidate TAs comprises:
and under the condition that the number of the candidate TAs is larger than a preset number threshold, carrying out average processing on the candidate TAs.
5. The method according to claim 4, wherein the averaging the candidate TAs comprises:
the maximum TA and the minimum TA of the candidate TAs are removed, and the average value of the remaining candidate TAs is calculated.
6. The method of claim 2, wherein the UE access quality information includes a received signal-to-noise ratio (SNR) and a Received Signal Strength (RSSI); the screening of all acquired TAs according to the UE access quality information to obtain a plurality of candidate TAs meeting a preset access requirement includes:
and when the SNR is greater than a preset signal-to-noise ratio threshold and the RSSI is greater than a preset signal strength threshold, determining the TA corresponding to the UE access quality information as a candidate TA.
7. An uplink delay adjusting apparatus, applied to a base station, the apparatus comprising:
a receiving module, configured to receive an uplink signal sent by a user equipment UE in a current adjustment period;
the adjusting module is used for adjusting the uplink time delay of the uplink signal according to a preset processing time delay calibration value so that the uplink signal reaches the baseband processing unit at a specified time; the processing time delay calibration value is obtained according to the timing advance TA of the historical UE monitored in the last adjustment period; the uplink time delay comprises hardware processing time delay in a base station, signal processing time delay of a forward transmission unit and power-on time delay jitter error; the historical UE is a plurality of historical UEs which send access requests to the base station in the last adjustment period;
the device also comprises a determining module, a calculating module and a judging module, wherein the determining module is used for calculating the difference value of the target TA and a preset TA reference value; the TA reference value is determined according to the variation range of processing time delay generated by processing the uplink signal in the history period by the base station; the target TA is determined according to a plurality of candidate TAs in a plurality of historical UE TAs; if the difference value is smaller than zero, increasing the absolute value of the difference value on the currently stored processing delay calibration value; and if the difference value is larger than or equal to zero, not adjusting the currently stored processing delay calibration value.
8. The apparatus for adjusting uplink delay according to claim 7, further comprising:
an obtaining module, configured to obtain a timing advance TA and UE access quality information of a historical UE corresponding to each historical access request in a previous adjustment period;
and the screening module is used for screening all the obtained TA according to the UE access quality information to obtain a plurality of candidate TA meeting the preset access requirement.
9. A base station comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method according to any of claims 1 to 6.
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 6.
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| CN201911420967.4A CN111182566B (en) | 2019-12-31 | 2019-12-31 | Method and device for adjusting uplink time delay, base station and storage medium |
| PCT/CN2020/139473 WO2021136095A1 (en) | 2019-12-31 | 2020-12-25 | Uplink time delay adjusting method and device, base station, and storage medium |
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| CN111182566B (en) * | 2019-12-31 | 2021-12-17 | 京信网络系统股份有限公司 | Method and device for adjusting uplink time delay, base station and storage medium |
| CN112105055B (en) * | 2020-08-21 | 2023-04-07 | 深圳市科思科技股份有限公司 | Data transmission method and device, electronic equipment and storage medium |
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| CN102083197B (en) * | 2010-12-23 | 2013-10-09 | 华为技术有限公司 | Method, equipment and system for processing time advance |
| CN105409272B (en) * | 2013-02-19 | 2019-09-13 | 华为技术有限公司 | A kind of method and device of uplink signal transmissions timing |
| CN110087303B (en) * | 2014-09-30 | 2022-07-12 | 华为技术有限公司 | Method and device for adjusting transmission timing |
| CN107734631B (en) * | 2016-08-11 | 2019-11-22 | 电信科学技术研究院 | A kind of timing adjusting method, base station, terminal and communication system |
| CN107404749B (en) * | 2017-06-30 | 2020-05-08 | 上海华为技术有限公司 | Communication connection method and base station |
| CN111182566B (en) * | 2019-12-31 | 2021-12-17 | 京信网络系统股份有限公司 | Method and device for adjusting uplink time delay, base station and storage medium |
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| CN102111257A (en) * | 2011-03-04 | 2011-06-29 | 中兴通讯股份有限公司 | Method and system for adjusting timing advance |
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