CN114245454B

CN114245454B - Data transmitting device, method and device for determining time adjustment amount and electronic equipment

Info

Publication number: CN114245454B
Application number: CN202111651619.5A
Authority: CN
Inventors: 韩梦捷
Original assignee: Shanghai Xingsi Semiconductor Co ltd
Current assignee: Shanghai Xingsi Semiconductor Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-08-09
Anticipated expiration: 2041-12-30
Also published as: CN114245454A

Abstract

The application provides a data sending device, a method and a device for determining time adjustment amount and electronic equipment, and relates to the technical field of communication. When the data sending device at least comprises a first FIFO module working under a low-time sampling rate and a second FIFO module working under a high-time sampling rate, the time adjustment amount is distributed to at least two FIFO modules working under different sampling rates, further, the time adjustment amount is distributed to at least two FIFO modules with different time adjustment accuracies, therefore, through the cooperation between at least two FIFO modules, the high-precision adjustment of the TA can be realized, and the problem of system performance reduction caused by low adjustment accuracy is solved.

Description

Data transmitting device, method and device for determining time adjustment amount and electronic equipment

Technical Field

The present application relates to the field of communications technologies, and in particular, to a data transmission apparatus, a method and an apparatus for determining a time adjustment amount, and an electronic device.

Background

When a terminal communicates with a base station, if the terminal is far away from the base station, there is a large transmission delay for uplink data transmitted by the terminal to the base station, specifically, there is a large time difference between the time when the uplink data arrives at the base station and the time when the uplink data is transmitted, and since different terminals are different from the base station, the time differences of different terminals are different, so that uplink signals transmitted by different terminals arrive at the base station at different times, thereby causing inter-code interference. In order to eliminate the inter-code interference, a Timing Advance (TA) concept is proposed, so that the time of the uplink signals from different terminals in the same subframe reaching the base station is basically aligned, thereby ensuring the orthogonality of the uplink signals and being beneficial to eliminating the inter-code interference.

In order to ensure that the uplink signals are continuous and uniform in the transmission process, a First-in First-out (FIFO) module is generally adopted to realize TA adjustment, and for a scene with low performance requirements, the FIFO module works at a sampling rate of 1 time to adjust TA, and the adjustment precision is low. If the TA estimation is inaccurate (e.g., the TA estimation has a large error when the channel condition is poor), then a ping-pong adjustment (repeated adjustment around zero) may occur due to the low adjustment precision, thereby resulting in a decrease in system performance.

Disclosure of Invention

An object of the embodiments of the present application is to provide a data sending apparatus, a method and an apparatus for determining a time adjustment amount, and an electronic device, so as to solve the problem in the prior art that the TA adjustment accuracy is low, which further causes the system performance to decrease.

In a first aspect, an embodiment of the present application provides a data transmission apparatus, including a plurality of FIFO modules operating at different sampling rates and at least one upsampling module, where the plurality of FIFO modules includes at least a first FIFO module operating at a low-fold sampling rate and a second FIFO module operating at a high-fold sampling rate;

the first FIFO module is used for adjusting the data sending mode of the first FIFO module according to the first time adjustment amount;

the up-sampling module of the at least one up-sampling module, which is positioned between the first FIFO module and the second FIFO module, is used for up-sampling the output data of the first FIFO module to a high-time sampling rate and transmitting the high-time sampling data to the second FIFO module;

the second FIFO module is used for adjusting the data sending mode of the second FIFO module according to the second time adjustment quantity;

wherein the first time adjustment amount and the second time adjustment amount are determined based on at least a timing advance TA to be adjusted, an adjustment step of the first FIFO module, and an adjustment step of the second FIFO module.

In the implementation process, the data sending device at least comprises a first FIFO module working at a low-time sampling rate and a second FIFO module working at a high-time sampling rate, when TA adjustment is carried out, at least two FIFO modules can adjust the data sending modes of the FIFO modules according to the time adjustment amounts obtained by the FIFO modules respectively, so that after the adjustment is finished, the TA of output data is equal to the TA required to be adjusted, the adjustment of the TA is realized, in the scheme, the time adjustment amounts are distributed to at least two FIFO modules working at different sampling rates, further, the time adjustment amounts are distributed to at least two FIFO modules with different time adjustment accuracies, and thus, the high-accuracy adjustment of the TA can be realized through the cooperation between at least two FIFO modules, and the problem of system performance reduction caused by low adjustment accuracy is solved.

Optionally, the first FIFO module is further configured to determine whether to trigger a preceding stage module of the first FIFO module to adjust a data transmission rate according to a current waterline of the first FIFO module after adjusting a data transmission mode of the first FIFO module according to the first time adjustment amount.

In the implementation process, the first FIFO module determines whether to trigger the preceding stage module to adjust the data transmission rate according to the current waterline, so that the first FIFO module can be prevented from overflowing or underflowing data, and the normal operation of the first FIFO module is maintained.

Optionally, the first FIFO module is specifically configured to, if a current waterline of the first FIFO module is greater than a first waterline threshold, trigger a preceding stage module of the first FIFO module to reduce a data transmission rate; and if the current waterline of the first FIFO module is smaller than a second waterline threshold value, triggering a preceding stage module of the first FIFO module to increase the data sending rate.

In the implementation process, when the current waterline is shallow, the data are quickly sent out by triggering the preceding stage module, so that the condition that the first FIFO module underflows can be avoided, and when the current waterline is deep, the data are slowly sent out by triggering the preceding stage module, so that the condition that the first FIFO module overflows can be avoided.

Optionally, the time adjustment amount corresponding to the FIFO module is calculated based on the following formula:

where N denotes the number of FIFO modules in the data transmission device, Δ TA _n Indicating the time adjustment, S, for the FIFO module numbered n _n Indicating the adjustment step of the FIFO block numbered n.

Optionally, after the second FIFO module adjusts its data sending mode according to the second time adjustment amount, the current waterline of the second FIFO module is greater than or equal to the initial waterline configured for the second FIFO module, and does not exceed the data depth of the second FIFO module.

Therefore, the second FIFO module can only do time delay, the preceding stage module can not be triggered to quickly send data, the first FIFO module can support time delay and time advance, and therefore through the cooperation of the first FIFO module and the second FIFO module, the up-sampling module between the first FIFO module and the second FIFO module does not need to improve the sampling rate to realize high-precision adjustment of the TA, and low cost of hardware resources is realized.

Optionally, the at least one upsampling module is located between the first FIFO module and the second FIFO module.

The up-sampling module is completely positioned between the first FIFO module and the second FIFO module, so that the first FIFO module works at a sampling rate of 1 time, the second FIFO module works at a sampling rate of high time, and the high-precision adjustment of the TA is realized through the cooperation of the two FIFO modules.

In a second aspect, an embodiment of the present application provides a method for determining a time adjustment amount, where the method is applied to the data transmission apparatus provided in the first aspect, and the method for determining includes:

acquiring a first time adjustment quantity of a first FIFO module and a second time adjustment quantity of a second FIFO module at least according to a time advance TA required to be adjusted, an adjustment step of the first FIFO module and an adjustment step of the second FIFO module;

and configuring the first FIFO module to adjust the data sending mode of the first FIFO module according to the first time adjustment amount, and configuring the second FIFO module to adjust the data sending mode of the second FIFO module according to the second time adjustment amount.

In the implementation process, when the TA is adjusted, the at least two FIFO modules can adjust the data sending mode of the FIFO modules according to the respective obtained time adjustment amount, so that the TA of output data is equal to the TA required to be adjusted after the adjustment is completed, the adjustment of the TA is realized, the time adjustment amount is distributed to the at least two FIFO modules by the scheme, further, the time adjustment amount is distributed to the at least two FIFO modules with different time adjustment accuracies, and therefore, the high-precision adjustment of the TA can be realized through the cooperation between the at least two FIFO modules, and the problem of system performance reduction caused by low adjustment accuracy is solved.

In a third aspect, an embodiment of the present application provides a device for determining a time adjustment amount, where the device operates in a data transmission device as provided in the first aspect, and the device for determining a time adjustment amount includes:

an adjustment amount obtaining module, configured to obtain a first time adjustment amount of a first FIFO module and a second time adjustment amount of a second FIFO module at least according to a timing advance TA that needs to be adjusted, an adjustment step of the first FIFO module, and an adjustment step of the second FIFO module;

and the configuration module is used for configuring the first FIFO module to adjust the data transmission mode of the first FIFO module according to the first time adjustment amount and configuring the second FIFO module to adjust the data transmission mode of the second FIFO module according to the second time adjustment amount.

In a fourth aspect, an embodiment of the present application provides an electronic device, including a processor and a memory, where the memory stores computer-readable instructions, and when the computer-readable instructions are executed by the processor, the steps in the method provided in the second aspect are executed.

In a fifth aspect, the present application provides a computer-readable storage medium, on which a computer program is stored, and the computer program runs the steps in the method provided in the second aspect when being executed by a processor.

Additional features and advantages of the present application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the present application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a block diagram of a first implementation of TA adjustment according to an embodiment of the present disclosure;

fig. 2 is a block diagram of a second implementation TA adjustment structure provided in the embodiment of the present application;

fig. 3 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of another data transmission apparatus according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of another data transmission apparatus according to an embodiment of the present application;

fig. 6 is a flowchart of a method for determining a time adjustment according to an embodiment of the present disclosure;

fig. 7 is a block diagram illustrating a structure of a device for determining a time adjustment according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of an electronic device for performing a method for determining an amount of time adjustment according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

It should be noted that the terms "system" and "network" in the embodiments of the present invention may be used interchangeably. The "plurality" means two or more, and in view of this, the "plurality" may also be understood as "at least two" in the embodiments of the present invention. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" generally indicates that the preceding and following related objects are in an "or" relationship, unless otherwise specified.

In order to ensure that uplink data sent by a terminal to a base station is continuous and uniform, a FIFO module may be generally used to implement TA adjustment, when TA needs to be decreased, a number of data points may be discarded from being sent at a slot or symbol starting position (i.e., an exit position in the FIFO module), and when TA needs to be increased, a certain data point (e.g., a first data point) is repeatedly sent at the slot or symbol starting position (i.e., an exit position in the FIFO module) multiple times, so that TA adjustment may be implemented.

For example, the TA adjustment may be implemented by using the structure shown in fig. 1 and 2, and fig. 1 and 2 take 4 times sampling rate as an example, and it is understood that other sampling multiples may be processed in a similar manner.

The structure of fig. 1 may be applied to a scenario with low performance requirement, and is generally connected to an FIFO module before the upsampling module, so that the FIFO module works at 1-time sampling rate to implement TA adjustment. A previous stage module may be connected before the FIFO module, where the previous stage module may be an Inverse Fast Fourier Transform (IFFT) module, and the IFFT module performs IFFT processing on the data and transmits the processed data to the FIFO module, where the FIFO module may adjust the output of the data according to the TA obtained by the terminal, for example, select a corresponding data transmission mode according to the TA, such as discarding some number of data points at the exit position or repeatedly transmitting the first data point at the exit position. The FIFO module works at 1 time of sampling rate, the processing rate of data is low, i.e. the time adjustment accuracy is low, when the channel condition is poor, the TA value estimated by the terminal or the base station is greatly deteriorated, which is easy to cause the situation that the TA value estimation is inaccurate, and at this time, because the adjustment accuracy of the FIFO module to the TA is low, ping-pong adjustment (repeated adjustment near zero) may occur, resulting in the degradation of system performance.

The structure shown in fig. 2 can be applied to a scene with a high performance requirement, and the FIFO module is connected behind the upsampling module to realize high-precision adjustment at a high sampling rate. As shown in fig. 2, the FIFO module works at 4 times of the sampling rate, and the data is up-sampled 4 times by the up-sampling module before entering the FIFO module for adjustment. However, TA adjustment may cause the pipeline in the FIFO module to change, the pipeline may increase when the time delay is performed, the pipeline may decrease when the time advance is performed, the data depth of the FIFO module is limited, and if TA adjustment is performed continuously and repeatedly in one direction (for example, TA is continuously increased or decreased), overflow or underflow of the FIFO module may be caused.

When the pipeline is shallow, the preceding stage module is required to send data to the FIFO module at a faster speed so that the FIFO module can be restored to the normal data depth. For example, the clock is 491.52M, the working sampling rate of the FIFO module is 30.72M, and thus 16 clk (clock) and one data valid are valid, and the entry and the exit of the normal FIFO module are both 16 clk and one data valid, and if the pipeline of the FIFO module is shallow due to TA adjustment, then in order to quickly recover the data depth of the FIFO module, the previous stage module is required to deliver data to the FIFO module at a speed of 8 clk and one data valid or faster, and at this time, the working sampling rate of the upsampling module in front of the FIFO module is required to be doubled. However, since the up-sampling module is generally implemented by hardware such as a filter, a large number of multipliers are generally required, and the area occupied by the multipliers in chip implementation is large, and if the sampling rate of the up-sampling module needs to be doubled, it means that a larger hardware area and power consumption are required.

And the time precision of the terminal transmission should not be lower than the related precision requirement in table7.3.2.2-1 as required by the protocol 38.133, as shown in table 1.

TABLE 1

Subcarrier spacing (kHz)	15	30	60	120
					TA adjustment accuracy of terminal	±256Tc	±256Tc	±128Tc	±32Tc

For the FR1(450MHz-6GHz) frequency range, the subcarrier spacing that the terminal needs to support is 15KHz and 30KHz, and Ts is known to be 64Tc, so the adjustment accuracy of TA should not be lower than ± 4Ts for the terminal supporting the FR1 frequency range of the NR system, and should not be lower than ± 0.5Ts for the terminal supporting the FR2(24.25GHz-52.6GHz) frequency range of the NR system.

Taking FR1 as an example, the bandwidth supported by the NR system covers a large bandwidth of 5M to 100M, generally 1-fold sampling rate is 122.88M, and the sampling point level adjustment accuracy can easily reach 1/4Ts, but for a small bandwidth of 5M, generally 1-fold sampling rate is 7.68M, and the sampling point level adjustment accuracy is only 4Ts, which is larger in step size during adjustment, and easily does not meet the requirement of the protocol on the adjustment accuracy of the TA.

Therefore, the adjustment accuracy of the TA is low by using the structure shown in fig. 1, and the requirement of the protocol on the adjustment accuracy of the TA is easily not met, and the requirement of the hardware of the front-stage module of the FIFO module is high by using the structure shown in fig. 2. In view of the two problems, the embodiment of the present application further provides a data transmission apparatus, where the data transmission apparatus includes a plurality of FIFO modules operating at different sampling rates, for example, at least a first FIFO module operating at a low-fold sampling rate and a second FIFO module operating at a high-fold sampling rate, and when TA adjustment is performed, at least two FIFO modules may adjust their data transmission modes according to respective obtained time adjustment amounts, so that after the adjustment is completed, the TA of output data is equal to the TA that needs to be adjusted, thereby implementing TA adjustment, and this scheme distributes the time adjustment amounts to at least two FIFO modules operating at different sampling rates, and further distributes the time adjustment amounts to at least two FIFO modules operating at different time adjustment accuracies, so that high-accuracy TA adjustment can be implemented through cooperation between at least two FIFO modules, therefore, the problem of system performance reduction caused by low adjustment precision is avoided.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a data transmission apparatus 100 according to an embodiment of the present disclosure, in which the data transmission apparatus 100 includes a plurality of FIFO modules operating at different sampling rates and at least one upsampling module 120, where the plurality of FIFO modules includes at least a first FIFO module 110 and a second FIFO module 130. In fig. 3 it is shown that the at least one upsampling module 120 may be located entirely between the first FIFO module 110 and the second FIFO module 130, in which case the first FIFO module 110 operates at 1 times the sampling rate, the second FIFO module 130 operates at M times the sampling rate, M being an integer greater than 1, and all of the middle upsampling modules are configured to upsample the output data of the first FIFO module 110 to M times the sampling rate and to transmit the M times the sampled data to the second FIFO module 130. The specific value of M depends on the number of at least one upsampling module, if there are 2 upsampling modules, each upsampling module is used for performing 2 times upsampling on input data, and then M is 4.

Of course, only a portion of the upsampling modules may be located between the first FIFO module 110 and the second FIFO module 130, as shown in fig. 4, if there are two upsampling modules, there may be one upsampling module 120 located between the first FIFO module 110 and the second FIFO module 130, and another upsampling module 120 located before the first FIFO module 110. It will be appreciated that in practical applications, the number of upsampling modules 120 between the first FIFO module 110 and the second FIFO module 130 may be flexibly set according to requirements.

In addition, in practical applications, the number of the FIFO modules may also be not only two, and the first FIFO module 110 and the second FIFO module 130 may refer to any two FIFO modules of the plurality of FIFO modules operating at different sampling rates, for example, any two adjacent FIFO modules, where adjacent means that only the upsampling module 120 is spaced between two FIFO modules. It will be appreciated that the connection structure between these FIFO modules and the at least one upsampling module 120 may be set according to actual requirements.

The first FIFO module 110 is configured to adjust its data sending manner according to a first time adjustment amount, where the first time adjustment amount is determined at least based on a TA that needs to be adjusted, an adjustment step of the first FIFO module 110, and an adjustment step of the second FIFO module 130.

An upsampling module of the at least one upsampling module 120, located between the first FIFO module 110 and the second FIFO module 130, is configured to upsample the output data of the first FIFO module 110 to a high sampling rate and to transmit the high-sampled data to the second FIFO module 130. The at least one upsampling module 120 may be a filter, such as an interpolation filter, and the data may be upsampled by a high factor through interpolation, or the at least one upsampling module 120 may be implemented by other devices or software.

The second FIFO module 130 is configured to obtain a data sending manner adjusted according to a second time adjustment amount, where the second time adjustment amount is also determined based on at least the TA, the adjustment step of the first FIFO module 110, and the adjustment step of the second FIFO module 130.

It can be understood that, in the case of multiple FIFO modules, the time adjustment amount of each FIFO module can be determined according to the TA to be adjusted and the adjustment step of each FIFO module, and specifically, when calculating the time adjustment amount, the time adjustment amount of each FIFO module can be calculated by using the following formula:

After each FIFO module obtains the self time adjustment amount, the data sending mode of each FIFO module can be adjusted according to the time adjustment amount, so that the TA of the final output data is equal to the TA required to be adjusted through the cooperation of each FIFO module. It is to be understood that each of the FIFO blocks is processed in a similar manner, and for convenience of description, the following embodiments will be described by taking the first FIFO block 110 and the second FIFO block 130 as an example.

Wherein the first FIFO module 110 operates at a low-multiple sampling rate and the second FIFO module 130 operates at a high-multiple sampling rate. The input end of the first FIFO module 110 may be connected to the output end of the previous stage module, the previous stage module may be an IFFT module or the previous stage module may include an IFFT module and an upsampling module, if the input end of the first FIFO module 110 is connected to the upsampling module, the input end of the upsampling module is connected to the IFFT module, the IFFT module may perform IFFT on uplink data sent by the terminal to the base station, then input the data after the IFFT into the upsampling module, and the upsampling module performs upsampling on the data and inputs the data into the first FIFO module 110. Or, when the front-stage module is an IFFT module, the IFFT module directly inputs the processed data into the first FIFO module 110.

The first FIFO module 110 may process data according to a data transmission manner configured by the terminal, for example, when the TA needs to be increased, the first FIFO module 110 repeatedly transmits a data point (for example, a first data point) at the exit position for a plurality of times, when the TA needs to be decreased, the first FIFO module 110 discards the data point at the exit position, and the second FIFO module 130 processes the data in the same manner, except that the second FIFO module 130 processes the data at a higher rate, that is, the adjustment precision is higher, for example, the first FIFO module 110 outputs 1 data point at a time, and the second FIFO module 130 can output 4 data points in the same time.

The upsampling module located between the first FIFO module 110 and the second FIFO module 130 upsamples the data output by the first FIFO module 110 by a factor of two. The up-sampling module up-samples the data and outputs the up-sampled data to the second FIFO module 130, and the second FIFO module 130 also processes the data similarly according to the processing manner of the data by the first FIFO module 110 and then outputs the data to the subsequent module.

When the apparatus only includes two FIFO modules, after the data transmission manner of the two FIFO modules is adjusted, the time advance amount corresponding to the output data of the second FIFO module 130 can be made to be the TA that needs to be adjusted, if the terminal determines that the TA that needs to be adjusted is 11Ts, the TA of the output data of the second FIFO module 130 is 11Ts after adjustment, that is, the TA of the output data of the terminal that indicates the data sent to the base station is delayed by 11 Ts.

In the implementation process, high-precision adjustment of the TA is realized through at least one first FIFO module 110 with low adjustment precision and one second FIFO module 130 with high adjustment precision, and data output by a plurality of FIFO modules including the first FIFO module 110 and the second FIFO module 130 is uniform. And the time adjustment quantity is distributed to at least two FIFO modules working under different sampling rates, and further, the time adjustment quantity is distributed to at least two FIFO modules with different time adjustment precisions, so that the high-precision adjustment of the TA can be realized through the cooperation between the at least two FIFO modules, and the problem of system performance reduction caused by low adjustment precision is solved.

When the current pipeline of the first FIFO module 110 underflows, in order to maintain the current pipeline of the first FIFO module 110 at a normal level, it is necessary to trigger a previous module to send data quickly, at this time, the previous module needs to support operation at a high sampling rate, and if the previous module includes an upsampling module, the hardware requirement on the upsampling module is high, so in order to reduce the hardware cost, the at least one upsampling module 120 may be disposed between the first FIFO module 110 and the second FIFO module 130.

Taking a sampling rate of 4 times (i.e. M is equal to 4) as an example, the second FIFO module 130 operates at a sampling rate of 4 times, in order to implement a sampling rate of 4 times and save hardware cost, the at least one upsampling module 120 may be implemented by using two-stage filtering, as shown in fig. 5, the at least one upsampling module 120 includes a first filter 122 and a second filter 124, the first filter 122 is configured to perform upsampling on the output data of the first FIFO module 110 by 2 times, and send the upsampled data by 2 times to the second filter 124, and the second filter 124 is configured to perform upsampling on the upsampled data by 2 times and output the upsampled data to the second FIFO module 130.

In this case, the input of the first FIFO module 110 is data of 1 time of the sampling rate, so the TA adjustment of 1 time of the sampling rate precision can be realized by the first FIFO module 110, the TA adjustment of 4 times of the sampling rate precision can be realized by the second FIFO module 130 working at 4 times of the sampling rate, and the two FIFO modules cooperate to realize the high-precision TA adjustment.

When TA adjustment is needed, the terminal may first obtain a TA value that needs to be adjusted, the base station may send the TA to the terminal, or the terminal may estimate the TA according to a signal received from the base station, and at this time, the terminal may determine the time adjustment amount of the first FIFO module 110 and the second FIFO module 130 based on the obtained TA.

Specifically, the terminal may obtain a first time adjustment amount of the first FIFO module 110 and a second time adjustment amount of the second FIFO module 130 according to the obtained TA, the adjustment step of the first FIFO module 110, and the adjustment step of the second FIFO module 130.

For example, taking an application scenario of a 5M bandwidth in an NR system as an example, the sampling rate of 1 time is 7.68M, and therefore, the adjustment step of the first FIFO module 110 is 4Ts (i.e. the adjustment precision is 4Ts), and the adjustment step of the second FIFO module 130 is 1Ts (i.e. the adjustment precision is 1 Ts).

If TA of the slotK to be adjusted is-11 Ts, the first time adjustment amount may be-3, and the second time adjustment amount may be 1, or the first time adjustment amount may be-2, and the second time adjustment amount may be-3, that is, a plurality of combination values of the first time adjustment amount and the second time adjustment amount may be obtained. When one of the combination values is selected as the final time adjustment amount, the combination value can be considered by combining the waterlines of the two FIFO modules, where the waterline refers to the current data amount of the FIFO module, for example, the waterline is 5, which means that the FIFO module performs data input and output based on 5 data amounts, if the data is normally input and output, there are 5 data points in the FIFO module, and after the TA adjustment, the waterline of the FIFO module changes (when the TA increases, the FIFO module selects to repeatedly send data points to adjust the TA, the waterline in the FIFO module increases at this time, and when the TA decreases, the FIFO module selects to discard some data points, and at this time, the waterline in the FIFO module decreases).

When the time adjustment amount is calculated, the time adjustment amount of each FIFO module can be calculated and obtained by using the following formula:

With the above scenario, when the data transmission apparatus 100 only includes the first FIFO module 110 and the second FIFO module 130, the first time adjustment amount and the second time adjustment amount can be calculated according to the above formula, and if the value of N is 2 and the values of N are 1 and 2 in the formula, the formula can be changed to TA- Δ TA ₁ ×S ₁ +ΔTA ₂ ×S ₂ Wherein, Δ TA ₁ Indicates a first time adjustment, S, of the first FIFO module 110 ₁ Represents the adjustment step, Δ TA, of the first FIFO module 110 ₂ Represents a second time adjustment, S, of the second FIFO module 130 ₂ Indicating the adjustment step of the second FIFO block 130.

Therefore, the first time adjustment amount and the second time adjustment amount can be obtained by the modified formula, and a plurality of combined values of the first time adjustment amount and the second time adjustment amount can be obtained based on the formula, and in order to select one combined value as the final time adjustment amount, the combined value can be determined by combining certain conditions, such as that the waterline of the two FIFO modules does not exceed the data depth (the depth refers to the total data amount that the FIFO modules can store) after adjustment, and the waterline of the two FIFO modules does not have to be a negative value.

Therefore, if the data depth of the first FIFO module 110 is 9, the data depth of the second FIFO module 130 is 4, the initial waterline allocated to the first FIFO module 110 is 5, the initial waterline allocated to the second FIFO module 130 is 1, the adjustment step of the first FIFO module 110 is 4Ts, the adjustment step of the second FIFO module 130 is 1Ts, and when TA is equal to-11 Ts, if the above condition is to be satisfied, the first time adjustment amount is-3, and the second time adjustment amount is 1, that is, -11Ts ═ 3 × 4Ts +1 × 1 Ts. At this time, the terminal may configure the first FIFO module 110 with a first time adjustment of-3 and the second FIFO module 130 with a second time adjustment of 1.

After obtaining the first time adjustment amount and the second time adjustment amount, the terminal may configure the data transmission mode of the first FIFO module 110 itself and configure the data transmission mode of the second FIFO module 130 itself. As shown in the above example, if the first time adjustment amount is-3, the first FIFO module 110 discards some data points, i.e. 3 data points at the exit position, so that the waterline decreases by 3, and if the second time adjustment amount is 1, the second FIFO module 130 repeatedly sends the first data point once (i.e. the first data point is sent to the next module twice in total), so that the waterline increases by 1, and if the first time adjustment amount is the first time adjustment amount, the waterline of the first FIFO module 110 becomes 2, and the waterline of the second FIFO module 130 becomes 2.

Therefore, the FIFO module may determine the corresponding data transmission manner according to the time adjustment amount, for example, the first FIFO module 110 is configured to adjust the data transmission manner of the first FIFO module 110 to discard the corresponding number of data points and not output the data points when the first time adjustment amount is a negative value, and adjust the data transmission manner of the first FIFO module 110 to repeatedly output the corresponding number of data points when the first time adjustment amount is a positive value.

The second FIFO module 130 is configured to, if the adjustment amount is a negative value at the second time, adjust the data transmission manner of the second FIFO module 130 to discard the corresponding number of data points and not output the data points, and if the adjustment amount is a positive value at the second time, adjust the data transmission manner of the second FIFO module 130 to repeatedly output the corresponding number of data points.

Continuing with the above example, if the TA that slotK +1 needs to be adjusted again is-3 Ts, at this time, after the last adjustment, the waterline of the first FIFO module 110 becomes 2, and the waterline of the second FIFO module 130 also becomes 2, the first time adjustment amount and the second time adjustment amount are continuously calculated by the above formula, where the first time adjustment amount may be-1, and the second time adjustment amount may be 1, that is, -3 × 4+1, and at this time, the terminal may configure the first time adjustment amount of the first FIFO module 110 as-1, and configure the time adjustment amount of the second FIFO module 130 as 1.

The first FIFO block 110 selects to discard the first data point at the egress location based on the first time adjustment and then outputs the subsequent data, when the pipeline of the first FIFO block 110 becomes 1. The second FIFO block 130 selects to repeatedly send the first data point at the egress position once based on the second time adjustment amount, and then continues to output subsequent data, at which time the waterline of the second FIFO block 130 becomes 3.

It can be seen from the above adjustment that the pipeline of the FIFO module changes by adjusting TA. In order to ensure that the waterline of the second FIFO module 130 does not overflow or underflow, and further, to avoid the problem that hardware resources need to be increased due to the fact that the upsampling module 120 before the second FIFO module 130 needs to be triggered to increase the sampling rate when the second FIFO module 130 underflows, a corresponding condition may be configured for the second time adjustment amount of the second FIFO module 130, for example, after the second FIFO module 130 is adjusted according to the second time adjustment amount, the current waterline of the second FIFO module 130 is greater than or equal to the initial waterline configured by the second FIFO module 130, and must not exceed the data depth thereof. In this way, the first FIFO module 110 may perform time delay and time advance, and the second FIFO module 130 may perform only time delay, so as to ensure that underflow does not occur, and thus, the preceding module is not triggered to send data quickly, that is, the up-sampling module 120 is not needed to increase the sampling rate, and further, hardware resources are not needed to be increased, thereby achieving low overhead.

Of course, after the second FIFO module 130 is adjusted, the waterline may also be smaller than the initial waterline, in this case, the initial waterline may be set higher, and the data depth should also be set deeper, so as to avoid underflow, which of course has higher requirement on the hardware of the second FIFO module 130. In order to save resources, when the time adjustment amounts of the two FIFO modules are obtained, the time adjustment amounts are distributed to the first FIFO module 110 as much as possible, that is, more time adjustment amounts are preferentially distributed to the first FIFO module 110, and the remaining time adjustment amounts are distributed to the second FIFO module 130, so that the data amount in the second FIFO module 130 is ensured to be at a normal level, the overflow or underflow condition is avoided, and further the fast sending or slow sending of the up-sampling module 120 between the first FIFO module 110 and the second FIFO module 130 is not triggered, that is, the up-sampling module 120 does not need to support the condition that the data sampling rate is instantaneously doubled or even larger.

In order to save hardware resources, the second FIFO module 130 may be implemented by using a FIFO module with a shallow data depth, where the data depth of the second FIFO module 130 is 4 in the above example, and when time adjustment amount distribution is performed, more time adjustment amounts are distributed to the first FIFO module 110 as much as possible, so that the time adjustment amount distributed by the second FIFO module 130 is not much, and therefore, the FIFO module with a deeper data depth is not needed to be implemented, and hardware implementation cost is lower.

It can be understood that, under the condition that there are multiple FIFO modules, the FIFO module at the final data output end may be processed similarly according to the manner of the second FIFO module 130, that is, the FIFO module at the final data output end may only perform time delay, and allocate the remaining time adjustment amount to the remaining FIFO modules as much as possible, and perform time delay and time advance through the remaining FIFO modules, so that the FIFO module at the final data output end may not trigger the preceding module to quickly send data, and the up-sampling module between the FIFO module and its adjacent FIFO module does not need to increase the sampling rate to realize high-precision adjustment of the TA, thereby saving hardware resources.

After the waterline of the first FIFO module 110 changes, the first FIFO module 110 may also have a situation of waterline underflow or overflow, and in order to ensure normal operation of the first FIFO module 110, the first FIFO module 110 may further obtain the current waterline of the first FIFO module 110 after adjusting its own data transmission manner according to the first time adjustment amount, and determine whether to trigger the front module of the first FIFO module 110 to adjust the data transmission rate according to the current waterline.

In the above example, the first FIFO module 110 is adjusted twice, the pipeline thereof becomes 1, and at this time, in order to avoid the pipeline thereof continuing to decrease, the previous module may be triggered to increase the data sending rate, for example, the data sending rate of the previous module is 16 clk-one data valid, and at this time, the data sending rate may be increased by 8 clk-one data valid.

Therefore, fast sending or slow sending of data of the previous stage module may be triggered by setting a waterline threshold, for example, when the current waterline of the first FIFO module 110 is greater than the first waterline threshold, the first FIFO module 110 may be triggered to lower the data sending rate, and if the current waterline of the first FIFO module 110 is less than the second waterline threshold, the first FIFO module 110 may be triggered to raise the data sending rate, so that the waterline of the first FIFO module 110 may be restored to the initial waterline, and thereby the underflow of the first FIFO module 110 may be avoided.

After two adjustments in the above example, the current waterline of the first FIFO module 110 becomes 1, and if the set first waterline threshold is 7 and the second waterline threshold is 3, and the current waterline is smaller than the second waterline threshold, the previous stage module is triggered to increase the data sending rate. The previous module is triggered to increase the data sending rate when the current waterline of the first FIFO module 110 is smaller than the second waterline threshold value in the above example, and the case that the previous module is triggered to decrease the data sending rate when the current waterline of the first FIFO module 110 is larger than the first waterline threshold value will be exemplified below.

For example, the data depth of the first FIFO module 110 is still 9, the data depth of the second FIFO module 130 is 4, the initial waterline of the first FIFO module 110 is 5, the initial waterline of the second FIFO module 130 is 1, the adjustment step of the first FIFO module 110 is 4Ts, and the adjustment step of the second FIFO module 130 is 1 Ts.

If TA that the slotK needs to be adjusted is 11Ts, through the above formula and conditional calculation, it can be obtained that the first time adjustment amount of the first FIFO module 110 is 2, the second time adjustment amount of the second FIFO module 130 is 3, that is, 11 ═ 2 × 4+3 × 1 (at this time, the second time adjustment amount plus the initial waterline is not less than the initial waterline), after the two FIFO modules are adjusted according to the respective time adjustment amounts, the current waterline of the first FIFO module 110 becomes 7 (the initial waterline 5+ the first time adjustment amount 2), and the current waterline of the second FIFO module 130 becomes 4 (the initial waterline 1+ the second time adjustment amount 3).

If the TA that slotK +1 needs to be adjusted is 3Ts, through the above formula and conditional calculation, it can be obtained that the first time adjustment amount of the first FIFO module 110 is 1, the second time adjustment amount is-1, after the two FIFO modules are adjusted according to their respective time adjustment amounts, the current waterline of the first FIFO module 110 becomes 8 (the waterline 7+ the first time adjustment amount 1 after last adjustment), and the current waterline of the second FIFO module 130 becomes 3 (the waterline 4+ the second time adjustment amount-1 after last adjustment).

If the first threshold is 7, the current waterline of the first FIFO module 110 after two adjustments is greater than the first threshold, and at this time, the previous module may be triggered to decrease the data sending rate, for example, the data sending rate of the previous module is one data valid of 8 clk, and at this time, the data sending rate may be one data valid of 16 clk. By triggering the front module to reduce the data transmission rate, the waterline of the first FIFO module 110 can be restored to the initial waterline, so that the overflow of the first FIFO module 110 can be avoided.

It should be noted that, if the pre-stage module includes the up-sampling module, when the pre-stage module is triggered to increase or decrease the data sending rate, the sampling precision of the up-sampling module needs to be adjusted, and when the data sending rate is increased, the sampling rate of the up-sampling module needs to be increased, at this time, the up-sampling module needs to support working at a high sampling rate.

Therefore, any number of TA adjustments can be implemented in the above manner, and the situations of overflow or underflow of the first FIFO module 110 and the second FIFO module 130 caused by TA adjustments are avoided, for example, the first FIFO module 110 triggers the previous module to fast or slow data transmission according to its pipeline to maintain the pipeline of the first FIFO module 110, and the second FIFO module 130 can only support time delay operation, does not support triggering the previous module to fast or slow data transmission according to the pipeline, and its pipeline is maintained by the allocation of the time adjustment amount, so that the up-sampling module 120 only needs to support uniform data, and the situation of the increase of the instantaneous data sampling rate is not considered. Therefore, through the mutual cooperation between the first FIFO module 110 with a low sampling rate and the second FIFO module 130 with a high sampling rate, high-precision TA adjustment can be achieved without increasing hardware resources, thereby achieving high TA adjustment precision with very little resource cost.

Based on the same inventive concept as the above embodiment, the present application further provides a method for determining a time adjustment amount, as shown in fig. 6, the method is used for adjusting the FIFO module in the data transmission apparatus, and includes the following steps:

step S210: and acquiring a first time adjustment amount of the first FIFO module and a second time adjustment amount of the second FIFO module at least according to the timing advance TA required to be adjusted, the adjustment step of the first FIFO module and the adjustment step of the second FIFO module.

The TA may be estimated by the terminal itself or sent to the terminal by the base station, and the specific acquisition manner may refer to the description in the above embodiment, and will not be described again here.

In obtaining the first time adjustment amount and the second time adjustment amount, the first time adjustment amount and the second time adjustment amount may be obtained according to the formula:

where N represents the number of FIFO modules in the data transmission device, Δ TA _n Indicating the time adjustment, S, for the FIFO module numbered n _n Indicating the adjustment step of the FIFO block numbered n.

It will be appreciated that in determining the two time adjustment amounts, other conditions may be considered in addition to the above formula, such as the current waterline of the two FIFO modules must not exceed their data depth after adjustment, or the current waterline of the second FIFO module must not be less than its configured initial waterline after adjustment, etc. For the sake of brevity, the detailed description is not repeated herein.

Step S220: and configuring the first FIFO module to adjust the data sending mode of the first FIFO module according to the first time adjustment amount, and configuring the second FIFO module to adjust the data sending mode of the second FIFO module according to the second time adjustment amount.

After obtaining the two time adjustment amounts, configuring the first FIFO module with the first time adjustment amount to configure the first FIFO module to adjust its data transmission manner according to the first time adjustment amount, and configuring the second FIFO module with the second time adjustment amount to configure the second FIFO module to adjust its data transmission manner according to the second time adjustment amount. Therefore, by adjusting the data transmission mode through each FIFO module, the time lead corresponding to the finally output data can be the TA which needs to be adjusted. For a specific adjustment process of the TA realized by matching at least two FIFO modules, reference may be made to the relevant description in the above embodiments, and details are not repeated here.

Referring to fig. 7, fig. 7 is a block diagram of a device 300 for determining a time adjustment amount according to an embodiment of the present disclosure, where the device 300 for determining a time adjustment amount operates on the data transmission device, and the device 300 for determining a time adjustment amount may be a module, a program segment, or a code on an electronic device. It should be understood that the time adjustment amount determining device 300 corresponds to the above-mentioned embodiment of the method in fig. 5, and can perform the steps related to the embodiment of the method in fig. 5, and the specific functions of the time adjustment amount determining device 300 can be referred to the above description, and the detailed description is appropriately omitted here to avoid redundancy.

Alternatively, the device 300 for determining the time adjustment amount may include:

an adjustment amount obtaining module 310, configured to obtain a first time adjustment amount of a first FIFO module and a second time adjustment amount of a second FIFO module at least according to a timing advance TA that needs to be adjusted, an adjustment step of the first FIFO module, and an adjustment step of the second FIFO module;

a configuration module 320, configured to configure the first FIFO module to adjust its own data sending manner according to the first time adjustment amount, and configure the second FIFO module to adjust its own data sending manner according to the second time adjustment amount.

It should be noted that, for convenience and brevity of description, the specific working procedures of the method for determining a time adjustment amount and the apparatus 300 for determining a time adjustment amount described above may refer to the corresponding procedures in the foregoing embodiments for describing the data transmission apparatus, and the description is not repeated here.

Referring to fig. 8, fig. 8 is a schematic structural diagram of an electronic device for performing a method for determining a time adjustment amount according to an embodiment of the present application, where the electronic device may be a terminal, and the electronic device includes: at least one processor 410, such as a CPU, at least one communication interface 420, at least one memory 430, and at least one communication bus 440. Wherein the communication bus 440 is used to enable direct connection communication of these components. In this embodiment, the communication interface 420 of the device in this application is used for performing signaling or data communication with other node devices. The memory 430 may be a high-speed RAM memory or a non-volatile memory (e.g., at least one disk memory). The memory 430 may optionally be at least one memory device located remotely from the aforementioned processor. The memory 430 stores computer readable instructions, which when executed by the processor 410, cause the electronic device to perform the method processes described above with reference to fig. 6.

It will be appreciated that the configuration shown in fig. 8 is merely illustrative and that the electronic device may include more or fewer components than shown in fig. 8 or have a different configuration than shown in fig. 8. The components shown in fig. 8 may be implemented in hardware, software, or a combination thereof.

Embodiments of the present application provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, performs the method processes performed by an electronic device in the method embodiment shown in fig. 6.

The present embodiments disclose a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the methods provided by the above-described method embodiments, for example, comprising: acquiring a first time adjustment quantity of a first FIFO module and a second time adjustment quantity of a second FIFO module at least according to a time advance TA required to be adjusted, an adjustment step of the first FIFO module and an adjustment step of the second FIFO module; and configuring the first FIFO module to adjust the data sending mode of the first FIFO module according to the first time adjustment amount, and configuring the second FIFO module to adjust the data sending mode of the second FIFO module according to the second time adjustment amount.

In summary, the embodiments of the present application provide a data sending device, a method and a device for determining a time adjustment amount, and an electronic device, the data transmission device comprises at least a first FIFO module operating at a low sampling rate and a second FIFO module operating at a high sampling rate, when TA adjustment is carried out, at least two FIFO modules can adjust the data transmission mode thereof according to the time adjustment quantity obtained respectively, therefore, after the adjustment is finished, the TA of the output data is equal to the TA required to be adjusted, so as to realize the adjustment of the TA, in the scheme, the time adjustment quantity is distributed to at least two FIFO modules working under different sampling rates, further, the time adjustment quantity is distributed to at least two FIFO modules with different time adjustment precisions, and through the matching between the at least two FIFO modules, therefore, the high-precision adjustment of the TA can be realized, and the problem of system performance reduction caused by low adjustment precision is solved.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.

In addition, units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

Furthermore, the functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A data transmission device is characterized by comprising a plurality of FIFO modules working at different sampling rates and at least one up-sampling module, wherein the plurality of FIFO modules at least comprise a first FIFO module working at a low-multiple sampling rate and a second FIFO module working at a high-multiple sampling rate;

2. The apparatus of claim 1, wherein the first FIFO module is further configured to determine whether to trigger a previous stage module of the first FIFO module to adjust the data transmission rate according to a current waterline of the first FIFO module after adjusting its data transmission mode according to the first time adjustment amount.

3. The apparatus of claim 2, wherein the first FIFO module is specifically configured to trigger a prior stage module of the first FIFO module to reduce the data transmission rate if a current waterline of the first FIFO module is greater than a first waterline threshold; and if the current waterline of the first FIFO module is smaller than a second waterline threshold value, triggering a preceding stage module of the first FIFO module to increase the data sending rate.

4. The apparatus of claim 1, wherein the time adjustment amount corresponding to the FIFO module is calculated based on the following formula:

5. The apparatus of claim 1, wherein after the second FIFO module adjusts its data transmission manner according to the second time adjustment amount, a current waterline of the second FIFO module is greater than or equal to an initial waterline configured for the second FIFO module and does not exceed a data depth of the second FIFO module.

6. The apparatus of claim 1, wherein the at least one upsample module is located between the first FIFO module and the second FIFO module.

7. A method for determining a time adjustment amount, the method being applied to the data transmission apparatus according to any one of claims 1 to 6, the method comprising:

8. A time adjustment amount determining apparatus, wherein the determining apparatus is operable with the data transmitting apparatus according to any one of claims 1 to 6, the determining apparatus comprising:

and the configuration module is used for configuring the first FIFO module to adjust the data sending mode of the first FIFO module according to the first time adjustment amount and configuring the second FIFO module to adjust the data sending mode of the second FIFO module according to the second time adjustment amount.

9. An electronic device comprising a processor and a memory, the memory storing computer readable instructions that, when executed by the processor, perform the method of claim 7.

10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method according to claim 7.