CN112636873B - Data transmission method, data transmission device, storage medium and electronic device - Google Patents
Data transmission method, data transmission device, storage medium and electronic device Download PDFInfo
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- CN112636873B CN112636873B CN202011511776.1A CN202011511776A CN112636873B CN 112636873 B CN112636873 B CN 112636873B CN 202011511776 A CN202011511776 A CN 202011511776A CN 112636873 B CN112636873 B CN 112636873B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0071—Use of interleaving
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The embodiment of the invention provides a data transmission method, a device, a storage medium and an electronic device of a physical downlink control channel, wherein the method comprises the following steps: scrambling the target bit data to obtain first bit data; interleaving and cyclic shift processing are carried out on the first bit data to obtain second bit data; performing target processing on the second bit data to obtain target symbol data; and transmitting the target symbol data to the target terminal through a target antenna port of the base station for transmitting the target symbol data. The invention solves the problems of long time consumption, complex system and large memory occupation of the physical downlink control channel for transmitting data in the prior art, and achieves the effects of reducing data transmission time and saving system memory and complexity.
Description
Technical Field
The embodiment of the invention relates to the field of communication, in particular to a data transmission method and device of a physical downlink control channel, a storage medium and an electronic device.
Background
In an LTE communication system, a Channel used for transmitting Control signaling from a base station (eNodeB) to a terminal (UE) is called a Physical Downlink Control Channel (PDCCH). The signaling mainly used by the PDCCH is Downlink Control Information (DCI), which includes scheduling Information for uplink and Downlink data transmission and a power Control command of the terminal. Specifically, the PDCCH only transmits DCI from the eNodeB to the UE, and the DCI is accurately received by the UE, so that the UE can know on which resource blocks the transmitting end places data required by the terminal and which modulation scheme is used to transmit the data. All the specific information is the basis for the receiving end to know other data information, and the received information can be further demodulated only by accurately knowing the content of the DCI. Therefore, the PDCCH is very important for the entire system, and directly affects data transmission of the downlink, including application and allocation of data transmission resources, and control of transmission power.
The processing procedure of the PDCCH at the transmitting end can be divided into two parts, namely bit-level processing and symbol-level processing, wherein the steps of the symbol-level processing are described in detail in the 3GPP protocol specification. In the actual development process, the symbol-level processing speed of the PDCCH determines the real-time performance of the whole system. Because the computation amount related to the symbol-level processing is large, and a large amount of memories are needed to store the computation results among the functions, the clear ordering of module calling can be ensured, the processing flow is not omitted, and the time consumption and the system complexity are increased. Therefore, on the basis of the traditional symbol-level processing algorithm, an improved method needs to be analyzed, researched and developed, and the design complexity of a sending end is reduced by simplifying the processing flow, so that the overall performance of the PDCCH link is improved, and a foundation is laid for the good performance of the whole system.
Therefore, the problems of long data transmission time of the physical downlink control channel, complex system and large memory occupation exist in the related technology.
Disclosure of Invention
The embodiment of the invention provides a data transmission method, a data transmission device, a storage medium and an electronic device of a physical downlink control channel, which are used for at least solving the problems of long time consumption, complex system and large memory occupation of the physical downlink control channel for transmitting data in the related technology.
According to an embodiment of the present invention, a method for transmitting data of a physical downlink control channel is provided, including: scrambling the target bit data to obtain first bit data; interleaving and cyclic shift processing are carried out on the first bit data to obtain second bit data; performing target processing on the second bit data to obtain target symbol data; and transmitting the target symbol data to a target terminal through a target antenna port of a base station for transmitting the target symbol data.
According to another embodiment of the present invention, there is provided a data transmission apparatus for a physical downlink control channel, including: the scrambling module is used for scrambling the target bit data to obtain first bit data; the interleaving and cyclic shift module is used for performing interleaving and cyclic shift processing on the first bit data to obtain second bit data; the processing module is used for carrying out target processing on the second bit data to obtain target symbol data; and the sending module is used for sending the target symbol data to a target terminal through a target antenna port of the base station for sending the target symbol data.
According to a further embodiment of the present invention, there is also provided a computer-readable storage medium having a computer program stored thereon, wherein the computer program is arranged to perform the steps of any of the above method embodiments when executed.
According to yet another embodiment of the present invention, there is also provided an electronic device, including a memory in which a computer program is stored and a processor configured to execute the computer program to perform the steps in any of the above method embodiments.
According to the invention, the target bit data is scrambled, the scrambled first bit data is subjected to interleaving cyclic shift processing to obtain second bit data, the second bit data is subjected to target processing to obtain target symbol data, and the target symbol data is sent to a target terminal through a target antenna port of a base station for sending the target symbol data. Because bit data is interleaved and circularly shifted, symbol data does not need to be interleaved and circularly shifted, data processing time is saved, and data transmission time is reduced, and second bit data is subjected to target processing to obtain target symbol data, and system memory is saved.
Drawings
Fig. 1 is a schematic diagram of a processing flow of an LTE downlink physical channel;
FIG. 2 is a flow diagram of symbol-level processing of PDCCH;
fig. 3 is a block diagram of a hardware structure of a mobile terminal of a data transmission method of a physical downlink control channel according to an embodiment of the present invention;
fig. 4 is a flowchart of a data transmission method of a physical downlink control channel according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating a data transmission method of a physical downlink control channel according to an exemplary embodiment of the present invention;
fig. 6 is a schematic diagram of a layer mapping process for two antennas according to an exemplary embodiment of the present invention;
fig. 7 is a diagram illustrating a two-antenna precoding process according to an exemplary embodiment of the present invention;
fig. 8 is a block diagram of a data transmission apparatus for a physical downlink control channel according to an embodiment of the present invention.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings in conjunction with the embodiments.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
In the 3GPP protocol, a schematic diagram of an LTE downlink physical channel processing flow can be seen in fig. 1, and as shown in fig. 1, the whole processing flow can be divided into two parts, namely, a bit-level processing and a symbol-level processing from the architecture. The bit-level processing mainly completes CRC, channel coding, rate matching and the like of a transmission block, and the symbol-level processing mainly completes scrambling, modulation, precoding, layer mapping, resource mapping and the like.
The PDCCH channel processing flow also includes bit-level processing and symbol-level processing, with the difference that the PDCCH channel only supports one transport block message, which is packed by DCI. The bit-level processed data information is carried by the corresponding PDCCH, and then a plurality of PDCCHs are multiplexed on available CCE logical resources. The symbol level processing is mainly to perform scrambling, modulation, precoding, layer mapping, interleaving and cyclic shift processing on the bit data stream, then to map to a corresponding time-frequency grid, and finally to send out through an antenna.
Referring to fig. 2, a schematic flow diagram of symbol-level processing of PDCCH may be shown, and as shown in fig. 2, the flow includes:
scrambling: the pseudo-random scrambling sequence is multiplied by the codeword sequence to obtain a new scrambled signal. The scrambling Sequence is a PN Sequence (Pseudo-Noise Sequence). The PN code randomizes interference between data and combat the interference.
Data modulation: the PDCCH channel supports QPSK, corresponding to 2 bits per modulation symbol, respectively.
Layer mapping: the data stream after code modulation is rearranged according to a certain rule, and the independent code words are mapped to the space concept layer. This spatial concept layer is the relay station to the physical antenna port. By such conversion, the original serial data stream has a preliminary concept of space.
Pre-coding: the layer data is mapped to different antenna ports, different subcarriers and different time slots so as to realize the purpose of diversity or multiplexing.
Resource mapping: and on each antenna port, corresponding the precoded data to a two-dimensional physical Resource (RE) consisting of subcarriers and time slots.
The bit stream information is input to the symbol level for processing, and the bit stream information still remains after the scrambling module. After being processed by a modulation module, the bit stream is modulated into IQ (in-phase quadrature) symbol data, the PDCCH adopts QPSK modulation, namely 2 bits are modulated into a group of IQ data, the real part and the imaginary part respectively occupy 16 bits, and a 32-bit register is required for storage in total. After modulation is finished, interleaving and cyclic shift are carried out on data streams according to certain requirements through processing of a layer mapping and pre-coding module, then the data streams are mapped into a frequency resource table according to a resource mapping format, OFDM symbols are generated, CP is inserted, and then the OFDM symbols are sent out from each antenna port.
The conventional process flow has two problems:
1. before resource mapping, data after precoding needs to be interleaved and circularly shifted again, which means that symbol-level IQ data needs to be interleaved and circularly shifted, which increases channel processing time undoubtedly, and the interleaving and circularly shifting of IQ data needs to be buffered by additionally increasing storage space, which also increases the requirement for system storage space.
2. The traditional symbol level processing flow needs to go through the processes of modulation, layer mapping, precoding and the like, if the processing is carried out according to the protocol convention module mode, the channel processing time is increased, meanwhile, more storage spaces are needed to cache the output data of each module, the requirement of a system on a memory is increased, and the error probability is also improved due to the complex processing module.
In view of the above problems in the related art, the present invention proposes the following embodiments to solve the problems in the related art.
The method embodiments provided in the embodiments of the present application may be executed in a mobile terminal, a computer terminal, or a similar computing device. Taking the operation on the mobile terminal as an example, fig. 3 is a block diagram of a hardware structure of the mobile terminal of a data transmission method of a physical downlink control channel according to an embodiment of the present invention. As shown in fig. 3, the mobile terminal may comprise one or more (only one shown in fig. 3) processors 302 (the processor 302 may comprise, but is not limited to, a processing means such as a microprocessor MCU or a programmable logic device FPGA) and a memory 304 for storing data, wherein the mobile terminal may further comprise a transmission device 306 for communication functions and an input-output device 308. It will be understood by those skilled in the art that the structure shown in fig. 3 is only an illustration, and does not limit the structure of the mobile terminal. For example, the mobile terminal may also include more or fewer components than shown in FIG. 3, or have a different configuration than shown in FIG. 3.
The memory 304 may be used to store computer programs, for example, software programs and modules of application software, such as a computer program corresponding to the data transmission method of the physical downlink control channel in the embodiment of the present invention, and the processor 302 executes various functional applications and data processing by running the computer programs stored in the memory 304, that is, implementing the above-described method. The memory 304 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 304 may further include memory located remotely from the processor 302, which may be connected to the mobile terminal through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The transmission device 306 is used to receive or transmit data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 306 includes a Network adapter (NIC) that can be connected to other Network devices through a base station to communicate with the internet. In one example, the transmitting device 306 can be a Radio Frequency (RF) module, which is used to communicate with the internet in a wireless manner.
In this embodiment, a data transmission method of a physical downlink control channel is provided, and fig. 4 is a flowchart of the data transmission method of the physical downlink control channel according to the embodiment of the present invention, as shown in fig. 4, the flowchart includes the following steps:
step S402, scrambling the target bit data to obtain first bit data;
step S404, interleaving and cyclic shift processing are carried out on the first bit data to obtain second bit data;
step S406, performing target processing on the second bit data to obtain target symbol data;
step S408, sending the target symbol data to a target terminal through a target antenna port of a base station for sending the target symbol data.
In the above embodiment, the target process may be one or more of a modulation process, a layer mapping process, or a precoding process, and when the target process is the modulation process, the layer mapping process, and the precoding process, the modulation process, the layer mapping process, and the precoding process may be combined into one processing module, so that data may be buffered only once during data processing, and a memory is saved.
In the above embodiment, when the target processing is modulation processing, layer mapping processing, and precoding processing, a flow diagram of the data transmission method of the physical downlink control channel may refer to fig. 5, as shown in fig. 5, and the functions of the modulation, layer mapping, and precoding modules are combined into one function to be implemented. Since the PDCCH channel only processes single-code stream data and is modulated with QPSK. The QPSK debugging corresponds to the 2-bit message to be modulated into a group of IQ data, and the IQ data after modulation is subjected to layer mapping processing and precoding processing. The modulation, layer mapping and pre-coding are combined together, and three module functions can be realized through one function.
Alternatively, the main body of the above steps may be a base station, a processor, etc., but is not limited thereto.
According to the invention, the target bit data is scrambled, the scrambled first bit data is subjected to interleaving cyclic shift processing to obtain second bit data, the second bit data is subjected to target processing to obtain target symbol data, and the target symbol data is sent to a target terminal through a target antenna port of a base station for sending the target symbol data. The bit data is interleaved and circularly shifted, so that the symbol data is not required to be interleaved and circularly shifted, the data processing time is saved, the data transmission time is shortened, the second bit data is subjected to target processing to obtain target symbol data, and the system memory is saved.
In an exemplary embodiment, interleaving and cyclically shifting the first bit data to obtain second bit data includes: interleaving the first bit data according to a first preset byte; and performing cyclic shift processing on the first bit data subjected to the interleaving processing according to a second preset byte to obtain second bit data. In this embodiment, the interleaving cyclic shift function can be completed after the scrambling. Because the interleaving function is performed for the REG unit, after the interleaving module is put to the pre-coding function in the conventional processing method, that is, each group of IQ data is stored as 32 bits, one REG needs 32 x 4 bits to perform interleaving operation, which not only occupies more memory, but also increases the processing time of the interleaving module. After the interleaving function is completed, a cyclic shift operation is also required, which is also performed for the REG group, and the two functions increase the time consumption for processing the entire PDCCH channel and affect the real-time performance of the system. From the above analysis, each group of REGs consists of 4 REs, and each 2bit obtains a group of IQ data during QPSK modulation, so that IQ data on each RE is obtained by 2bit modulation, and then a group of REGs consists of 4 REs, which is equivalent to a data stream requiring 8 bits, so that the interleaved REG group is obtained by packing 8-bit data streams and then performing QPSK modulation. The 8bit is exactly a byte, after the scrambling module, interleaving can be directly carried out according to the byte, then cyclic shift is carried out according to the byte, so that a bit data stream after interleaving shift is obtained, modulation, layer mapping and precoding functions are directly carried out on the bit stream, and IQ data of resource mapping are exactly obtained. The symbol level interleaving and cyclic shift functions are completed under the condition of bit stream data, only the operation needs to be carried out on the bit stream data, and only 1/16 space of the symbol level data needs to be occupied relative to the symbol level IQ data, so that the processing time is saved, the real-time performance of a system is improved, and meanwhile, the error probability in the design process is reduced due to the reduced processing links.
In an exemplary embodiment, before interleaving the first bit data by a first predetermined byte, the method further includes: determining a first length of the first bit data; determining the first predetermined byte based on the first length. In this embodiment, interleaving and cyclic shift processing may be performed according to bytes, that is, a first length of the first bit data may be determined before interleaving the first bit data according to the first predetermined byte, and the first predetermined byte may be determined according to the first length. For example, the first predetermined byte may be 1 byte or 2 bytes, and the first predetermined byte is not limited in the present invention.
In an exemplary embodiment, before performing a cyclic shift process on the first bit data after performing the interleaving process according to a second predetermined byte, the method further includes: determining a first length of the first bit of data, the second predetermined byte being determined based on the first length; or, determining a second length of the first bit data after the interleaving, and determining the second predetermined byte based on the second length. In this embodiment, the second predetermined byte may be determined according to the first length of the first bit data, or may be determined according to the second length of the first bit data after the interleaving processing. The first predetermined byte may be 1 byte or 2 bytes, and the second predetermined byte is not limited in the present invention.
In an exemplary embodiment, the target processing the second bit data to obtain target symbol data comprises: performing target modulation on the second bit data to obtain first symbol data under the condition that the base station is a single-antenna base station; determining the first symbol data as the target symbol data. In this embodiment, for the single-antenna base station system, both the layer mapping processing and the precoding processing are transparent, and no operation is required, so that the single-antenna system can directly omit the two modules of layer mapping and precoding. Directly performing target modulation processing on the second bit data, wherein the target modulation can be QPSK modulation, and the QPSK modulation principle is as follows: QPSK modulation maps 2-bit data b (I), b (I + 1) onto complex modulation symbols x, where x = I + jQ. As shown in table 1.
TABLE 1
In an exemplary embodiment, the target processing the second bit data to obtain target symbol data comprises: determining preset parameters of the base station under the condition that the base station is a multi-antenna base station, wherein the preset parameters comprise parameters determined based on modulation parameters, precoding parameters and transmitting power of the base station; multiplying the second bit data by the preset parameter to obtain initial symbol data; and converting the initial symbol data according to a preset format to obtain the target symbol data. In this embodiment, for a multi-antenna base station, such as a two-antenna base station system, since a PDCCH channel only supports single-stream data, the layer mapping process only arranges the single-stream data to two layers in an odd-even manner, and this process changes the arrangement manner of the modulated IQ symbol data and can directly store the debugged data according to the odd-even rule. The PDCCH only supports the precoding of the transmission diversity under a multi-antenna model, the first path of data of the transmission diversity precoding of the two antennas is the data after the layer mapping is directly transmitted, and the second path of data is the data after the layer mapping is multiplied by a corresponding factor and then output. Both the two processes can be combined into a modulation process, the modulation process is essentially obtained by multiplying bit stream data by a modulation parameter, and the modulation parameter, a precoding coefficient and data including a power control factor which are fixed for a PDCCH channel, so that IQ data can be directly multiplied by a corresponding coefficient after modulation, then the IQ data are output according to a certain format, and finally data needing resource mapping are obtained.
Wherein, the layer mapping principle is as follows: transmit diversity is employed for the PDCCH channel and the corresponding layer mapping method is shown in table 2. The PDCCH channel supports only a single codeword in layer mapping, the number of layers mapped being the same as the number of antenna ports from which the physical channel is transmitted. The schematic diagram of the layer mapping process of the two antennas can be seen in fig. 6.
TABLE 2
The precoding principle is as follows: the precoding of the PDCCH only supports the transmission model of the transmit diversity, and the precoding processing process of the data after layer mapping is as follows
The precoding process of the transmit diversity is divided into two-antenna and four-antenna cases. The schematic diagram of the precoding process of two antennas can be seen in fig. 7.
In the foregoing embodiment, the symbol-level processing is optimized in two places, the first optimization is to combine the three processing modules of modulation, layer mapping and precoding into one module, and the second optimization is to advance the interleaving and cyclic shift processing procedures of the symbol data to the completion of the bit-level data. On the basis of meeting the protocol requirements, the time consumption of PDCCH channel processing is saved, and meanwhile, the interaction of processing modules is reduced, and the storage space is saved.
Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
In this embodiment, a data transmission apparatus for a physical downlink control channel is further provided, and the apparatus is used to implement the foregoing embodiments and preferred embodiments, and details of which have been already described are omitted. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware or a combination of software and hardware is also possible and contemplated.
Fig. 8 is a block diagram of a data transmission apparatus for a physical downlink control channel according to an embodiment of the present invention, and as shown in fig. 8, the apparatus includes:
a scrambling module 82, configured to perform scrambling processing on the target bit data to obtain first bit data;
an interleaving and cyclic shifting module 84, configured to perform interleaving and cyclic shifting processing on the first bit data to obtain second bit data;
a processing module 86, configured to perform target processing on the second bit data to obtain target symbol data;
a sending module 88, configured to send the target symbol data to a target terminal through a target antenna port of a base station that is used to send the target symbol data.
In an exemplary embodiment, the interleaving and cyclic shifting module 84 includes: an interleaving unit, configured to perform interleaving processing on the first bit data according to a first predetermined byte; and a cyclic shift unit, configured to perform cyclic shift processing on the first bit data subjected to the interleaving processing according to a second predetermined byte, so as to obtain the second bit data.
In an exemplary embodiment, the apparatus may be configured to determine a first length of the first bit data before interleaving the first bit data by a first predetermined byte; determining the first predetermined byte based on the first length.
In an exemplary embodiment, the apparatus may be further configured to determine a first length of the first bit data before performing a cyclic shift process on the first bit data after performing the interleaving process according to a second predetermined byte, and determine the second predetermined byte based on the first length; or, determining a second length of the first bit data after the interleaving, and determining the second predetermined byte based on the second length.
In an exemplary embodiment, the processing module 86 may perform the target processing on the second bit data to obtain the target symbol data by: performing target modulation on the second bit data to obtain first symbol data under the condition that the base station is a single-antenna base station; determining the first symbol data as the target symbol data.
In an exemplary embodiment, the processing module 86 may perform the target processing on the second bit data to obtain the target symbol data by: determining preset parameters of the base station under the condition that the base station is a multi-antenna base station, wherein the preset parameters comprise parameters determined based on modulation parameters, precoding parameters and transmitting power of the base station; multiplying the second bit data by the preset parameter to obtain initial symbol data; and converting the initial symbol data according to a preset format to obtain the target symbol data.
It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in different processors in any combination.
An embodiment of the present invention further provides a computer-readable storage medium, in which a computer program is stored, wherein the computer program is configured to perform the steps in any of the above method embodiments when executed.
In an exemplary embodiment, the computer-readable storage medium may include, but is not limited to: various media capable of storing computer programs, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.
Embodiments of the present invention also provide an electronic device comprising a memory having a computer program stored therein and a processor arranged to run the computer program to perform the steps of any of the above method embodiments.
In an exemplary embodiment, the electronic apparatus may further include a transmission device and an input/output device, wherein the transmission device is connected to the processor, and the input/output device is connected to the processor.
For specific examples in this embodiment, reference may be made to the examples described in the above embodiments and exemplary embodiments, and details of this embodiment are not repeated herein.
It will be apparent to those skilled in the art that the various modules or steps of the invention described above may be implemented using a general purpose computing device, they may be centralized on a single computing device or distributed across a network of computing devices, and they may be implemented using program code executable by the computing devices, such that they may be stored in a memory device and executed by the computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into various integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A data transmission method of a physical downlink control channel is characterized by comprising the following steps:
scrambling the target bit data to obtain first bit data;
interleaving and cyclic shift processing are carried out on the first bit data to obtain second bit data;
determining preset parameters of a base station under the condition that the base station is a multi-antenna base station, wherein the preset parameters comprise parameters determined based on modulation parameters, precoding parameters and transmitting power of the base station;
multiplying the second bit data by the preset parameter to obtain initial symbol data;
converting the initial symbol data according to a preset format to obtain target symbol data;
and sending the target symbol data to a target terminal through a target antenna port used for sending the target symbol data in the base station.
2. The method of claim 1, wherein interleaving and cyclically shifting the first bit data to obtain second bit data comprises:
interleaving the first bit data according to a first preset byte;
and performing cyclic shift processing on the first bit data subjected to the interleaving processing according to a second preset byte to obtain second bit data.
3. The method of claim 2, wherein prior to interleaving the first bit of data in a first predetermined byte, the method further comprises:
determining a first length of the first bit data;
determining the first predetermined byte based on the first length.
4. The method according to claim 3, wherein before performing cyclic shift processing on the first bit data after the interleaving processing according to a second predetermined byte, the method further comprises:
determining a first length of the first bit of data, the second predetermined byte being determined based on the first length; alternatively, the first and second electrodes may be,
and determining a second length of the first bit data after the interleaving processing, and determining the second predetermined byte based on the second length.
5. The method of claim 1, wherein the target processing of the second bit data to obtain target symbol data comprises:
performing target modulation on the second bit data to obtain first symbol data under the condition that the base station is a single-antenna base station;
determining the first symbol data as the target symbol data.
6. A data transmission apparatus for a physical downlink control channel, comprising:
the scrambling module is used for scrambling the target bit data to obtain first bit data;
the interleaving and cyclic shift module is used for performing interleaving and cyclic shift processing on the first bit data to obtain second bit data;
the base station comprises a processing module and a transmitting module, wherein the processing module is used for determining preset parameters of a base station under the condition that the base station is a multi-antenna base station, and the preset parameters comprise parameters determined based on modulation parameters, precoding parameters and transmitting power of the base station; multiplying the second bit data by the preset parameter to obtain initial symbol data; converting the initial symbol data according to a preset format to obtain target symbol data;
and the sending module is used for sending the target symbol data to a target terminal through a target antenna port which is used for sending the target symbol data in the base station.
7. The apparatus of claim 6, wherein the interleaving and cyclic shifting module comprises:
an interleaving unit, configured to perform interleaving processing on the first bit data according to a first predetermined byte;
and a cyclic shift unit, configured to perform cyclic shift processing on the first bit data subjected to the interleaving processing according to a second predetermined byte, so as to obtain the second bit data.
8. A computer-readable storage medium, in which a computer program is stored, wherein the computer program is arranged to perform the method of any of claims 1 to 5 when executed.
9. An electronic device comprising a memory and a processor, wherein the memory has stored therein a computer program, and wherein the processor is arranged to execute the computer program to perform the method of any of claims 1 to 5.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011511776.1A CN112636873B (en) | 2020-12-18 | 2020-12-18 | Data transmission method, data transmission device, storage medium and electronic device |
| PCT/CN2021/093929 WO2022127014A1 (en) | 2020-12-18 | 2021-05-14 | Method and device for data transmission, storage medium, and electronic device |
Applications Claiming Priority (1)
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| CN113300989A (en) * | 2021-07-28 | 2021-08-24 | 四川创智联恒科技有限公司 | Method for rapidly realizing NR-5G physical downlink shared channel |
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| CN112636873A (en) | 2021-04-09 |
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