CN114679790A - Information transmission method and device and electronic equipment - Google Patents
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Abstract
The embodiment of the application discloses an information transmission method, an information transmission device and electronic equipment. On one hand, the method allocates the frequency domain resources through the frequency domain repetition times corresponding to the source data to obtain frequency domain resource allocation information, then generates the downlink control information according to the frequency domain repetition times and the frequency domain resource allocation information to directly carry the frequency domain repetition times in the downlink control information, and because the downlink control information is transmitted in the physical layer, the method can directly realize the rapid configuration of the repeated transmission in the physical layer, and reduces the time delay of the data transmission by performing the data copy transmission in the frequency domain. On the other hand, the downlink control information is sent to the terminal, so that the terminal transmits the source data and the repeated data corresponding to the source data according to the downlink control information, and the error rate is reduced by repeatedly transmitting the source data at the allocated frequency domain resource position, so that the reliability of data transmission is improved on the premise of not increasing the data transmission delay.
Description
Technical Field
The present disclosure relates to the field of communications, and in particular, to an information transmission method and apparatus, and an electronic device.
Background
With the rapid development of the fifth Generation Mobile Communication Technology (5G), Ultra-high Reliable and Low Latency Communication (URLLC) is one of three major application scenarios of 5G, and is a technical basis for new applications related to the industrial internet, such as vehicle networking, industrial automation, and power automatic control, and data transmission of these URLLC service applications needs to meet the requirements of Ultra-high reliability and Ultra-Low Latency. Therefore, a New Radio (NR) system introduces Repetition transmission (Repetition), that is, the same data can be transmitted for multiple times through different time slots or redundancy versions, so as to obtain diversity gain and reduce Block Error rate (BLER).
However, the existing repeated transmission of traffic channel data is to perform redundancy version transmission and combination in the time domain, which is at the cost of increasing the delay, and is contrary to the objectives of URLLC, such as low delay and high reliability.
Therefore, how to effectively perform resource repeat transmission is an urgent problem to be solved.
Disclosure of Invention
In order to solve the above technical problem, embodiments of the present application provide an information transmission method, an information transmission device, and an electronic device, so as to effectively reduce a time delay of data transmission on the premise of ensuring reliability of data transmission.
According to an aspect of the embodiments of the present application, there is provided an information transmission method applied to a network device, including: allocating frequency domain resources according to the frequency domain repetition times corresponding to the source data to obtain frequency domain resource allocation information; generating downlink control information according to the frequency domain repetition times and the frequency domain resource allocation information; and sending the downlink control information to the terminal so that the terminal confirms the frequency domain resource position corresponding to the frequency domain resource allocation information according to the downlink control information, and transmits the source data and the repeated data corresponding to the source data according to the frequency domain resource position.
In some embodiments, generating the downlink control information according to the frequency domain repetition times and the frequency domain resource allocation information comprises: obtaining a frequency domain repetition number indication field value according to the frequency domain repetition number; obtaining a frequency domain resource allocation indication field value according to the frequency domain resource allocation information; and generating downlink control information according to the frequency domain repetition number indication field value and the frequency domain resource allocation indication field value.
In some embodiments, deriving the frequency domain repetition indication field value according to the frequency domain repetition, includes: acquiring an idle field in downlink control information; selecting a preset number of idle fields as frequency domain repetition time indication fields, and determining frequency domain repetition time indication field values corresponding to the frequency domain repetition time indication fields according to the frequency domain repetition times.
In some embodiments, selecting a preset number of idle fields as the frequency domain repetition number indication field, and determining the frequency domain repetition number indication field value corresponding to the frequency domain repetition number indication field according to the frequency domain repetition number, includes: coding the frequency domain repetition times to obtain a frequency domain repetition time indication field value; taking the digits of the frequency domain repetition number indication field value as a preset number, and selecting idle fields with the preset number as frequency domain repetition number indication fields; the frequency domain repetition indication field value is filled in the frequency domain repetition indication field.
In some embodiments, before allocating the frequency domain resources according to the frequency domain repetition times corresponding to the source data to obtain the frequency domain resource allocation information, the method further includes: acquiring a service quality grade parameter corresponding to source data; and determining the frequency domain repetition times corresponding to the source data according to the service quality grade parameter.
In some embodiments, before allocating the frequency domain resources according to the frequency domain repetition times corresponding to the source data to obtain the frequency domain resource allocation information, the method further includes: acquiring communication environment parameters corresponding to a terminal; and determining the frequency domain repetition times corresponding to the source data according to the communication environment parameters.
According to an aspect of an embodiment of the present application, there is provided an information transmission method applied to a terminal, including: receiving downlink control information sent by a network device; the downlink control information is generated according to the frequency domain resource allocation information and the frequency domain repetition times corresponding to the source data, and the frequency domain resource allocation information is obtained by allocating the frequency domain resources according to the frequency domain repetition times corresponding to the source data; confirming the frequency domain resource position corresponding to the frequency domain resource allocation information according to the downlink control information; and transmitting the source data and the repeated data corresponding to the source data according to the frequency domain resource position.
According to an aspect of the embodiments of the present application, there is provided an information transmission apparatus, applied to a network device, including: the resource allocation module is configured to allocate frequency domain resources according to the frequency domain repetition times corresponding to the source data to obtain frequency domain resource allocation information; a control information generation module configured to generate downlink control information according to the frequency domain repetition times and the frequency domain resource allocation information; and the control information sending module is configured to send downlink control information to the terminal, so that the terminal confirms the frequency domain resource position corresponding to the frequency domain resource allocation information according to the downlink control information, and transmits the source data and the repeated data corresponding to the source data according to the frequency domain resource position.
According to an aspect of the embodiments of the present application, there is provided an information transmission apparatus, applied to a terminal, including: a control information receiving module configured to receive downlink control information transmitted by a network device; the downlink control information is generated according to the frequency domain resource allocation information and the frequency domain repetition times corresponding to the source data, and the frequency domain resource allocation information is obtained by allocating the frequency domain resources according to the frequency domain repetition times corresponding to the source data; a resource confirming module configured to confirm a frequency domain resource position corresponding to the frequency domain resource allocation information according to the downlink control information; and the data receiving module is configured to transmit the source data and the repeated data corresponding to the source data according to the frequency domain resource position.
According to an aspect of an embodiment of the present application, there is provided an electronic device including: a processor; and a memory for storing one or more programs that, when executed by the one or more processors, cause the one or more processors to implement the information transmission method as described above.
In the technical solution provided in the embodiment of the present application, on one hand, frequency domain resources are allocated according to frequency domain repetition times corresponding to source data to obtain frequency domain resource allocation information, and then downlink control information is generated according to the frequency domain repetition times and the frequency domain resource allocation information to directly carry the frequency domain repetition times in the downlink control information; on the other hand, the downlink control information is sent to the terminal, so that the terminal transmits the source data and the repeated data corresponding to the source data according to the downlink control information, the source data is repeatedly transmitted at the allocated frequency domain resource position to reduce the error rate, and the reliability of data transmission is improved on the premise of not increasing the data transmission delay.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is a schematic diagram of a communication system shown in an exemplary embodiment of the present application;
FIG. 2 is a flow chart illustrating an information transfer method according to an exemplary embodiment of the present application;
FIG. 3 is a schematic diagram illustrating data transmission in accordance with an exemplary embodiment of the present application;
fig. 4 is a flowchart illustrating an information transmission method according to another exemplary embodiment of the present application;
fig. 5 is a flowchart illustrating an information transmission method according to another exemplary embodiment of the present application;
fig. 6 is a flowchart illustrating an information transmission method according to another exemplary embodiment of the present application;
fig. 7 is a schematic diagram of an information transmission apparatus applied to a network device side according to an exemplary embodiment of the present application;
fig. 8 is a schematic diagram illustrating an information transmission apparatus applied to a terminal side according to an exemplary embodiment of the present application;
fig. 9 is a schematic structural diagram of a computer system of an electronic device according to an exemplary embodiment of the present application.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments identical to the present application. Rather, they are merely examples of the same apparatus and methods as some aspects of the present application, as detailed in the appended claims.
The flow charts shown in the drawings are merely illustrative and do not necessarily include all of the contents and operations/steps, nor do they necessarily have to be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.
In this application, the term "plurality" means two or more. "and/or" describe the association relationship of the associated objects, meaning that there may be three relationships, e.g., A and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
In the related art, data replication transmission in a traffic channel of the third Generation Partnership Project (3 GPP) is direct continuous Repeat transmission, for example, a communication standard of 3GPP Release15 (Release15, Rel-15) supports configuration Repeat parameters, allows cyclic transmission of respective Redundancy Versions (RVs) of a Transport Block (TB) based on a Hybrid Automatic Repeat reQuest (HARQ) mode at the same symbol position within a continuously available slot.
However, the data duplication transmission in the existing traffic channel is to perform the transmission of the redundancy version in the time domain, at the cost of increasing the delay, which is contrary to the goal of URLLC in that it can both have low delay and high reliability.
Therefore, the present application provides an information transmission method, where frequency domain resources are allocated according to frequency domain repetition times corresponding to source data to obtain frequency domain resource allocation information, and downlink control information is generated according to the frequency domain repetition times and the frequency domain resource allocation information to directly carry the frequency domain repetition times in the downlink control information. And then, sending downlink control information to the terminal so that the terminal can confirm the frequency domain resource position corresponding to the frequency domain resource allocation information according to the downlink control information, and transmit the source data and the repeated data corresponding to the source data according to the frequency domain resource position.
Optionally, the information transmission method in the embodiment of the present application may be applied to a Carrier Aggregation (CA) scenario, a Dual Connectivity (DC) scenario, or an independent (SA) networking scenario, which is not limited in this application.
Illustratively, the above-described information transmission method may be applied to a communication system as shown in fig. 1. The communication system may include a network device 110, and the network device 110 may be a device that communicates with a terminal 120. Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminals 120 located within the coverage area. As shown in fig. 1, the network device 110 is connected to the terminal 120 through a network, which includes but is not limited to: local Area Networks (LANs), Metropolitan Area Networks (MANs), Wide Area Networks (WANs), mobile, wired or wireless networks, private networks, or any combination of virtual private networks.
Alternatively, the Network device 110 may be a Base Transceiver Station (BTS) in a Global System for Mobile Communications (GSM) or a Wideband Code Division Multiple Access (CDMA) System, a Base Station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA) System, an evolved Node B (eNB, or eNodeB) in a Long Term Evolution (Long Term Evolution) System of universal Mobile telecommunications technology, or a wireless controller in a Cloud Radio Access Network (CRAN) System, or a Mobile switching center, a relay Station, a vehicle-mounted device, a wearable device, a hub, a switch, a router, a Network-side device in a 5G Network, or a future Public Mobile Network (terrestrial Network bridge), PLMN), etc.
The communication system further comprises at least one terminal 120 located within the coverage area of the network device 110. The terminal 120 may be, but is not limited to, a smart phone, a tablet computer, a notebook computer, a desktop computer, a smart speaker, a smart watch, and the like. The terminal 120 may generally refer to one of a plurality of terminals, and the embodiment is merely illustrated with the terminal 120. Those skilled in the art will appreciate that the number of terminals may be greater or less. For example, the number of the terminals may be only one, or the number of the terminals may be several tens or several hundreds, or more, and the implementation environment of the image processing method further includes other terminals.
The network device 110 may provide a service for a cell, the terminal device 120 communicates with the network device 110 through a data transmission resource used by the cell, the cell may be a cell corresponding to the network device 110 (e.g., a base station), the cell may belong to a macro base station or a Small base station (Small cell), the cell may include, for example, a city cell (Metro cell), a Micro cell (Micro cell), a pico cell (pico cell), a Femto cell (Femto cell), and the like, and the cells have the characteristics of Small coverage and low transmission power, and are suitable for providing a high-rate data transmission service.
Optionally, the communication system may further include other network entities such as a network controller, a mobility management entity, and the like, which is not limited in this application.
It should be understood that a device having a communication function in a network/system in the embodiments of the present application may be referred to as a communication device. Taking the communication system shown in fig. 1 as an example, the communication device may include a network device 110 and a terminal 120 having a communication function, and the network device 110 and the terminal 120 may be the specific devices described above, which are not described herein again. The communication device may further include other devices in the communication system, such as other network entities like a network controller, a mobility management entity, and the like, which is not limited in this embodiment.
An embodiment of the present invention provides an information transmission method, which is applied to a network device, please refer to fig. 2, and fig. 2 is a flowchart illustrating the information transmission method according to an embodiment of the present application. As shown in fig. 2, the information transmission method at least includes steps S210 to S230, which are described in detail as follows:
step S210, allocating frequency domain resources according to the frequency domain repetition times corresponding to the source data to obtain frequency domain resource allocation information.
In order to transmit data or signaling, the Physical channels are divided into a Physical Downlink Control Channel (PDCCH), a Physical Uplink Control Channel (PUCCH), a Physical Downlink Shared Channel (PDSCH), and a Physical Uplink Shared Channel (PUSCH). Wherein, the PDCCH is used for transmitting a physical Downlink Control signaling (DCI); the PUCCH is used to transmit uplink control Information, such as Channel State Information (CSI), HARQ, Scheduling Request (SR), and the like; the PDSCH is used for transmitting downlink data; the PUSCH is used to transmit information such as uplink data and CSI.
The source data refers to data that the network device needs to send to the terminal or data that the terminal needs to send to the network device, that is, the source data is data transmitted in the PDSCH or the PUSCH. The frequency domain repetition number refers to the number of times the source data needs to be repeatedly transmitted. For example, if the frequency domain repetition number is M, M repeated data for transmitting the source data are required on a channel (e.g., PDSCH or PUSCH), that is, when the source data is transmitted, a total of M +1 times of data transmission is required. The M pieces of repeating data carry completely the same information, that is, the data contents of the M pieces of repeating data are all from source data, and the RVs corresponding to the M pieces of repeating data after channel coding may be different or the same, where the RV refers to different redundancy versions obtained by channel coding transmission data, and generally, the RV may be a channel version {0, 1, 2, 3 }.
It can be understood that, because the frequency domain resources required by the source data are different in the number of times that the source data needs to be repeatedly transmitted on the frequency domain resources, the frequency domain resources need to be allocated according to the frequency domain repetition number corresponding to the source data, so as to obtain the frequency domain resource allocation information.
The frequency domain Resource allocation information includes location information of frequency domain resources, an available time corresponding to each frequency domain Resource, and the like, and is mainly used for determining a Resource Block (RB) set allocated to the PDSCH or the PUSCH for data transmission.
In some embodiments, before allocating the frequency domain resources according to the frequency domain repetition times corresponding to the source data to obtain the frequency domain resource allocation information, the information transmission method further includes: acquiring a service quality grade parameter corresponding to source data; and determining the frequency domain repetition times corresponding to the source data according to the service quality grade parameter.
It should be noted that a quality of service (QoS) level parameter is used to specify the quality level of service provided by the network communication.
Different source data may have different characteristics and quality of service (QoS) requirements, such as delay, throughput, and simultaneous connections. In a communication system, a network device may communicate with multiple terminals over a configurable air interface, and different network devices and terminals may have different transmission capabilities or requirements. For example, an eNB may have multiple transmit antennas, and a pico cell may have only one transmit antenna or a relatively small number of transmit antennas. Similarly, a smartphone terminal in the terminal may have much higher data bandwidth requirements and signal processing capabilities than a sensor terminal.
Illustratively, the network device stores a quality of service level parameter and a frequency domain repetition number mapping table, and determines the frequency domain repetition number corresponding to the quality of service level parameter of the source data by querying the mapping table. For example, when the level of the quality of service obtained by analyzing the QoS is higher, the frequency domain repetition number corresponding to the source data is larger, so as to ensure the reliability of data transmission by increasing the repetition number of the source data; when the grade of the service quality obtained by analyzing the QoS is lower, the frequency domain repetition frequency corresponding to the source data is smaller, so that the resource waste is avoided.
In some embodiments, before allocating the frequency domain resources according to the frequency domain repetition times corresponding to the source data to obtain the frequency domain resource allocation information, the information transmission method further includes: acquiring communication environment parameters corresponding to a terminal; and determining the frequency domain repetition frequency corresponding to the source data according to the communication environment parameters.
It should be noted that the communication environment parameter may be a Channel Quality Indicator (CQI) parameter, and the CQI is an information indication of the Channel Quality and represents the Quality of the current Channel Quality.
In this embodiment, the network device receives the CQI reported by the terminal, and then calculates the frequency domain repetition number corresponding to the source data based on the CQI. For example, when the current channel quality of the terminal is poor by analyzing the CQI, the frequency domain repetition number corresponding to the source data is larger, so as to ensure the reliability of data transmission by increasing the repetition number of the source data; when the current channel quality of the terminal is better by analyzing the CQI, the frequency domain repetition frequency corresponding to the source data is smaller, and the waste of resources is avoided.
In some embodiments, the frequency domain repetition number may be determined by combining the communication environment parameter corresponding to the terminal and the service quality level parameter corresponding to the source data to dynamically adjust the frequency domain repetition number of the source data, so that the obtained frequency domain repetition number is more accurate, and the reliability of data transmission is ensured on the premise of not wasting data transmission resources.
Step S220 is to generate downlink control information according to the frequency domain repetition times and the frequency domain resource allocation information.
It should be noted that the PDCCH channel transmits control information related to a physical uplink/downlink shared channel (PUSCH, PDSCH), that is, DCI information, which includes some related contents such as RB resource allocation information, Modulation and Coding Scheme (MCS), HARQ process ID, and the like. The terminal can correctly process the PDSCH data or the PUSCH data only if the DCI information is correctly decoded.
In the embodiment of the present invention, what the URLLC terminal receives and the network device sends is information in a new DCI format, which carries the frequency domain repetition times and the frequency domain resource allocation information, so as to quickly configure relevant parameters for source data repeat transmission in the DCI in the physical layer, thereby effectively improving the reliability of the transmission link.
Illustratively, the downlink control information may explicitly indicate a frequency domain repetition number. For example, the downlink control information may indicate the frequency domain repetition number while indicating the frequency domain resources used per repeated transmission of the PDSCH or PUSCH.
As another example, the downlink control information may implicitly indicate the frequency domain repetition number. For example, the downlink control information only indicates the frequency domain resources occupied by each repeated transmission of the PDSCH or the PUSCH, and the terminal may determine the frequency domain repetition number according to the frequency domain resources occupied by each repeated transmission of the PDSCH or the PUSCH. For example, if the downlink control information indicates 4 frequency domain resources occupied by the PDSCH for repeatedly transmitting the source data each time, the terminal may determine that the frequency domain repetition number is 4.
The network device may indicate the frequency domain repetition number and the frequency domain resource allocation information in the DCI of the scheduling target PDSCH or PUSCH. Accordingly, after receiving the DCI, the terminal device may determine the frequency domain repetition number and the frequency domain resource allocation information according to the DCI.
Step S230, sending the downlink control information to the terminal, so that the terminal determines the frequency domain resource location corresponding to the frequency domain resource allocation information according to the downlink control information, and transmits the source data and the repeated data corresponding to the source data according to the frequency domain resource location.
It should be noted that, in the embodiment of the present application, the direction of data transmission is not limited, and may be uplink transmission or downlink transmission, that is, "transmission" includes "reception" and "transmission".
In the communication system shown in fig. 1, data transmission is possible between the network device and the terminal, and the following description will be given taking the following data transmission as an example. As shown in fig. 3, downlink data of a terminal is carried by a PDSCH, and a frequency domain resource location where the PDSCH corresponding to the terminal device is located is indicated by DCI carried on the PDCCH, where the frequency domain resource location includes a starting RB location and an ending RB location, and data transmitted corresponding to the frequency domain resource location includes source data and repeated data REK1, REK2, and REK3 corresponding to the source data. The terminal receives the source data, REK1, REK2, and REK3 according to the frequency domain resource location.
In some embodiments, referring to fig. 4, fig. 4 is a flowchart illustrating an information transmission method according to another exemplary embodiment, where in the above exemplary embodiment, before allocating frequency-domain resources according to the frequency-domain repetition number corresponding to the source data to obtain frequency-domain resource allocation information, steps S410 to S420 are further included.
Step S410, acquiring a frequency domain repeated transmission indication field.
Before sending the source data, it is necessary to determine whether the data retransmission function is in an on state, so that when the retransmission function is in the on state, the source data is retransmitted.
For example, the network device may indicate that the retransmission function is in an on state through Radio Resource Control (RRC) signaling.
For example, for the following data transmission, the content of RRC configuration may be as follows (only some of which are illustrated):
PDSCH-Config::＝SEQUENCE{PDSCH-FrequencyDomainRepetitionFunction ENUMERATED{enabled,disabled}OPTIONAL...}
the "PDSCH-frequency domain repetition function" in the RRC configured content is a frequency domain repetition transmission indication field, and selectable values of the frequency domain repetition transmission indication field include enabled and disabled to indicate the on and off of the downlink data frequency domain repetition transmission function.
And step S420, determining whether data retransmission is possible according to the frequency domain retransmission indication field, if data retransmission is possible, executing step S210, and if data retransmission is not possible, ending the step.
Illustratively, after the value of the frequency domain repeat transmission indication field is obtained, whether data repeat transmission can be performed is judged according to the value. For example, the selectable value of the frequency domain repeat transmission indication field includes enabled and disabled, and when the value of the frequency domain repeat transmission indication field is enabled, it indicates that data repeat transmission is possible; when the value of the frequency domain repeated transmission indication field is disabled, it indicates that repeated transmission of data is not possible. And after the network equipment determines that the PDSCH or the PUSCH can carry out repeated transmission, the subsequent data repeated transmission step is carried out.
It should be noted that, when the frequency domain retransmission indication field indicates that data retransmission is possible, the terminal may parse the frequency domain repetition times and the frequency domain resource allocation information in the received DCI to distinguish the source data from the repeated data.
Referring to fig. 5, fig. 5 is a flow chart illustrating an information transmission method according to another exemplary embodiment. As shown in fig. 5, in an exemplary embodiment, the step S220 of generating the downlink control information according to the frequency domain repetition times and the frequency domain resource allocation information may include the following steps:
step S221, obtaining a frequency domain repetition frequency indication field value according to the frequency domain repetition frequency; and obtaining a frequency domain resource allocation indication field value according to the frequency domain resource allocation information.
For example, the Frequency domain resource allocation information is indicated by a "Frequency domain resource allocation" (information indicated by a Frequency domain resource allocation field) field in the DCI Format 0_0/0_1, and the Frequency domain repetition number may be indicated by introducing a new bit field into the DCI or reserving a free bit in the DCI.
In some embodiments, obtaining the frequency domain repetition indication field value according to the frequency domain repetition, includes: acquiring an idle field in downlink control information; selecting a preset number of idle fields as frequency domain repetition time indication fields, and determining frequency domain repetition time indication field values corresponding to the frequency domain repetition time indication fields according to the frequency domain repetition times.
Illustratively, an idle field in the DCI may be used as the frequency domain repetition number indication field.
For example, the preset number may be a specified fixed number, or may be a number dynamically determined according to a current data transmission scenario, which is not limited in the present application.
For example, referring to table 1, 2 bits that may be free in DCI Format 0_1/0_2/1_1/1_2 are used as a frequency domain repetition indication field (Value of DCI repetition), and the frequency domain repetition indication field has an optional Value of 2, 4, 8, 16, which represents frequency domain repetition K.
TABLE 1
The idle field may be randomly selected as the frequency domain repetition number indication field, or a fixed field may be designated as the frequency domain repetition number indication field, which is not limited in this application.
In some embodiments, selecting a preset number of idle fields as a frequency domain repetition number indication field, and determining a frequency domain repetition number indication field value corresponding to the frequency domain repetition number indication field according to the frequency domain repetition number, includes: coding the frequency domain repetition times to obtain a frequency domain repetition time indication field value; taking the digits of the frequency domain repetition number indication field value as a preset number, and selecting idle fields with the preset number as frequency domain repetition number indication fields; the frequency domain repetition indication field value is filled in the frequency domain repetition indication field.
It should be noted that the encoding process refers to a process of converting data to be encoded from one data format to another data format.
The encoding method used in the encoding process may be a standard encoding method disclosed, such as a binary encoding method, to convert the frequency domain repetition times into a binary expression sequence. Binary refers to a radix-2 notation system in mathematical and digital circuits, and represents the binary system of the system in radix-2, usually represented by two different symbols 0 and 1.
The encoding method adopted in the encoding process may also be a self-defined encoding method, as shown in table 1 above, when the field value indicated by the frequency domain repetition number is 00, it indicates that the frequency domain repetition number is 2; when the frequency domain repetition indicates that the field value is 01, indicating that the frequency domain repetition is 4; when the frequency domain repetition number indicates that the field value is 10, indicating that the frequency domain repetition number is 8; when the frequency domain repetition number indication field value is 11, it indicates that the frequency domain repetition number is 16. It can be understood that, if the frequency domain repetition number is encoded by using the customized encoding method, the network device needs to agree with the terminal in advance with an encoding rule, so that the terminal can correctly analyze the DCI after receiving the DCI.
The bit number of the frequency domain repetition frequency indication field value after the encoding processing is used as the preset number, so that the length of the DCI is reduced on the premise that the frequency domain repetition frequency indication field value can be correctly filled in the DCI, and resources occupied by transmitting the DCI are further reduced.
Step S222 generates downlink control information according to the frequency domain repetition number indication field value and the frequency domain resource allocation indication field value.
And combining the frequency domain repetition time indication field value and the frequency domain resource allocation indication field value to obtain the downlink control information.
In the technical solution provided in the embodiment of the present application, on one hand, frequency domain resources are allocated according to frequency domain repetition times corresponding to source data to obtain frequency domain resource allocation information, and then downlink control information is generated according to the frequency domain repetition times and the frequency domain resource allocation information to directly carry the frequency domain repetition times in DCI. On the other hand, the downlink control information is sent to the terminal, so that the terminal confirms the frequency domain resource position corresponding to the frequency domain resource allocation information according to the downlink control information, and transmits the source data and the repeated data corresponding to the source data according to the frequency domain resource position, so that the error rate is reduced by repeatedly transmitting the source data at the allocated frequency domain resource position, and the reliability of data transmission is improved on the premise of not increasing the data transmission delay.
An embodiment of the present invention provides an information transmission method, which is applied to a terminal, please refer to fig. 6, where fig. 6 is a flowchart illustrating the information transmission method according to an embodiment of the present application. As shown in fig. 6, the information transmission method at least includes steps S610 to S630, which are described in detail as follows:
step S610, receiving downlink control information sent by the network equipment; the downlink control information is generated according to the frequency domain resource allocation information and the frequency domain repetition frequency corresponding to the source data, and the frequency domain resource allocation information is obtained by allocating the frequency domain resources according to the frequency domain repetition frequency corresponding to the source data.
In the data transmission process, the network device schedules resources by using DCI, illustratively, the DCI carries several related contents such as RB resource allocation information, Modulation and Coding Scheme (MCS), HARQ process ID, and the like, and the terminal receives the DCI sent by the network device, so that the terminal determines how to receive data carried by the PDSCH or PUSCH according to the DCI.
Illustratively, the DCI corresponding to the terminal is carried on the PDCCH, and the terminal searches all PDCCH regions according to an agreed rule to see whether the DCI belongs to the terminal exists, and if the DCI belongs to the terminal exists in the PDCCH regions, the DCI belonging to the terminal is received and analyzed.
Step S620, determining a frequency domain resource location corresponding to the frequency domain resource allocation information according to the downlink control information.
And the terminal analyzes the received DCI to obtain information such as frequency domain resource allocation information and frequency domain repetition times carried by the DCI, confirms the position of the frequency domain resources according to the frequency domain resource allocation information, receives data according to the position of the frequency domain resources and detects whether the data is received completely according to the frequency domain repetition times.
Step S630, the source data and the repeated data corresponding to the source data are transmitted according to the frequency domain resource location.
And the terminal transmits the source data and the repeated data corresponding to the source data according to the frequency domain resource position of the PDSCH or the PUSCH indicated by the received DCI.
For example, in downlink data transmission, the terminal receives the source data and the repeated data corresponding to the source data according to the frequency domain resource location where the PDSCH indicated by the received DCI is located, and performs merging and decoding on the received source data and the repeated data corresponding to the source data to obtain the target data.
For example, one RV may be used for encoding the same data block to obtain an encoded codeword, and then the encoded codeword is divided into multiple portions, and each of the multiple portions is transmitted on a different frequency domain resource. In this case, for the terminal, if the data in the PDSCH is from the same coded codeword, the terminal concatenates the coded bits detected on different frequency domain resources and then performs joint decoding.
For another example, the same data block may be encoded by using different RVs to obtain different encoded code words, and then the obtained different encoded code words are transmitted by using different frequency domain resources. For the terminal, if the data in the PDSCH comes from different coding blocks using independent RV versions, the coding blocks detected by independent RV on different frequency domain resources are decoded after soft bit combining, or the terminal decodes the data on different frequency domain resources separately, so as to determine whether to correctly detect the data carried in the PDSCH.
In the technical solution provided in the embodiment of the present application, on one hand, by receiving downlink control information sent by a network device, and determining a frequency domain resource location corresponding to frequency domain resource allocation information according to the downlink control information, the frequency domain repetition number is directly obtained through DCI, so that related parameters of repeated transmission can be directly and rapidly configured in a physical layer. On the other hand, the source data and the repeated data corresponding to the source data are transmitted according to the frequency domain resource positions, and then the source data are repeatedly transmitted at the allocated frequency domain resource positions to reduce the error rate, so that the reliability of data transmission is improved on the premise of not increasing the data transmission delay.
Fig. 7 is a block diagram of an information transmission apparatus 700 according to an embodiment of the present application, applied to a network device, where as shown in fig. 7, the information transmission apparatus 700 includes:
the resource allocation module 710 is configured to allocate frequency domain resources according to the frequency domain repetition times corresponding to the source data, so as to obtain frequency domain resource allocation information.
A control information generating module 720 configured to generate downlink control information according to the frequency domain repetition times and the frequency domain resource allocation information.
The control information sending module 730 is configured to send downlink control information to the terminal, so that the terminal determines the frequency domain resource position corresponding to the frequency domain resource allocation information according to the downlink control information, and transmits the source data and the repeated data corresponding to the source data according to the frequency domain resource position.
In one embodiment of the present application, the control information generating module 720 may include:
the field value acquisition unit is configured to obtain a frequency domain repetition frequency indication field value according to the frequency domain repetition frequency; and obtaining a frequency domain resource allocation indication field value according to the frequency domain resource allocation information.
An information generating unit configured to generate the downlink control information according to the frequency domain repetition number indication field value and the frequency domain resource allocation indication field value.
In one embodiment of the present application, the field value obtaining unit may include:
an idle field obtaining unit configured to obtain an idle field in the downlink control information.
And the repetition number indication field value confirming unit is configured to select a preset number of the idle fields as frequency domain repetition number indication fields, and determine the frequency domain repetition number indication field value corresponding to the frequency domain repetition number indication fields according to the frequency domain repetition number.
In one embodiment of the present application, the repetition number indication field value confirmation unit may include:
and the encoding unit is configured to perform encoding processing on the frequency domain repetition times to obtain a frequency domain repetition time indication field value.
And the field number confirming unit is configured to take the digit of the frequency domain repetition number indication field value as a preset number, and select the idle fields with the preset number as frequency domain repetition number indication fields.
A value padding unit configured to pad the frequency domain repetition indication field value in the frequency domain repetition indication field.
In one embodiment of the present application, the information transmission apparatus 700 may further include:
and the service quality grade parameter acquisition unit is configured to acquire the service quality grade parameter corresponding to the source data.
And the first frequency domain repetition frequency confirming unit is configured to determine the frequency domain repetition frequency corresponding to the source data according to the service quality grade parameter.
In one embodiment of the present application, the information transmission apparatus 700 may further include:
a communication environment parameter acquiring unit configured to acquire a communication environment parameter corresponding to the terminal;
and the second frequency domain repetition frequency confirming unit is configured to determine the frequency domain repetition frequency corresponding to the source data according to the communication environment parameter.
It should be noted that the information transmission apparatus provided in the foregoing embodiment and the information transmission method provided in the foregoing embodiment belong to the same concept, and specific ways for the modules and units to perform operations have been described in detail in the method embodiments, and are not described herein again. In practical applications, the information transmission apparatus provided in the foregoing embodiment may distribute the functions to different functional modules according to needs, that is, divide the internal structure of the apparatus into different functional modules to complete all or part of the functions described above, which is not limited herein.
Fig. 8 is a block diagram of an information transmission apparatus 800 according to an embodiment of the present application, which is applied to a terminal, and as shown in fig. 8, the information transmission apparatus 800 includes:
a control information receiving module 810 configured to receive downlink control information transmitted by a network device; the downlink control information is generated according to frequency domain resource allocation information and frequency domain repetition times corresponding to the source data, and the frequency domain resource allocation information is obtained by allocating frequency domain resources according to the frequency domain repetition times corresponding to the source data.
A resource confirming module 820 configured to confirm a frequency domain resource location corresponding to the frequency domain resource allocation information according to the downlink control information.
The data receiving module 830 is configured to transmit the source data and the repeated data corresponding to the source data according to the frequency domain resource location.
It should be noted that the information transmission apparatus provided in the foregoing embodiment and the information transmission method provided in the foregoing embodiment belong to the same concept, and specific ways for the modules and units to perform operations have been described in detail in the method embodiments, and are not described herein again. In practical applications, the information transmission apparatus provided in the foregoing embodiment may distribute the functions to different functional modules according to needs, that is, divide the internal structure of the apparatus into different functional modules to complete all or part of the functions described above, which is not limited herein.
FIG. 9 illustrates a schematic structural diagram of a computer system suitable for use to implement the electronic device of the embodiments of the subject application.
It should be noted that the computer system 900 of the electronic device shown in fig. 9 is only an example, and should not bring any limitation to the functions and the scope of the application of the embodiments.
As shown in fig. 9, electronic device 900 is in the form of a general purpose computing device. Components of electronic device 900 may include, but are not limited to: the at least one processing unit 910, the at least one storage unit 920, a bus 930 connecting different system components (including the storage unit 920 and the processing unit 910), and a display unit 940.
Where the storage unit stores program code, the program code may be executed by the processing unit 910 to cause the processing unit 910 to perform the steps according to various exemplary embodiments of the present disclosure described in the above-mentioned "exemplary methods" section of this specification.
The storage unit 920 may include readable media in the form of volatile memory units, such as a random access memory unit (RAM)921 and/or a cache memory unit 922, and may further include a read only memory unit (ROM) 923.
The electronic device 900 may also communicate with one or more external devices 970 (e.g., keyboard, pointing device, bluetooth device, etc.), with one or more devices that enable a user to interact with the electronic device 900, and/or with any devices (e.g., router, modem, etc.) that enable the electronic device 900 to communicate with one or more other computing devices. Such communication may occur via input/output (I/O) interface 950. Also, the electronic device 900 may communicate with one or more networks (e.g., a local area network, a wide area network, and/or a public network, such as the Internet) via the network adapter 960. As shown, the network adapter 960 communicates with the other modules of the electronic device 900 via the bus 930. It should be appreciated that although not shown, other hardware and/or application modules may be used in conjunction with the electronic device 900, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, tape drives, and data backup storage systems, among others.
In particular, according to embodiments of the present application, the processes described above with reference to the flowcharts may be implemented as a computer application. For example, embodiments of the present application include a computer program product comprising a computer program embodied on a computer readable medium, the computer program comprising a computer program for performing the method illustrated by the flow chart. Which when executed by the processing unit 910 performs the various functions defined in the system of the present application.
It should be noted that the computer readable medium shown in the embodiments of the present application may be a computer readable signal medium or a computer readable storage medium or any combination of the two. The computer readable storage medium may be, for example, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples of the computer readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a Read-Only Memory (ROM), an Erasable Programmable Read-Only Memory (EPROM), a flash Memory, an optical fiber, a portable Compact Disc Read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this application, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In this application, however, a computer-readable signal medium may include a propagated data signal with a computer program embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. The computer program embodied on the computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the foregoing.
The units described in the embodiments of the present application may be implemented by an application program or by hardware, and the described units may also be disposed in a processor. Wherein the names of the elements do not in some way constitute a limitation on the elements themselves.
Another aspect of the present application also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the foregoing information transmission method. The computer-readable storage medium may be included in the electronic device described in the above embodiment, or may exist separately without being incorporated in the electronic device.
Another aspect of the application also provides a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the information transmission method provided in the above embodiments.
The above description is only a preferred exemplary embodiment of the present application, and is not intended to limit the embodiments of the present application, and those skilled in the art can easily make various changes and modifications according to the main concept and spirit of the present application, so that the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. An information transmission method applied to a network device, the method comprising:
allocating frequency domain resources according to the frequency domain repetition times corresponding to the source data to obtain frequency domain resource allocation information;
generating downlink control information according to the frequency domain repetition times and the frequency domain resource allocation information;
and sending the downlink control information to a terminal so that the terminal can confirm the frequency domain resource position corresponding to the frequency domain resource allocation information according to the downlink control information, and transmit the source data and the repeated data corresponding to the source data according to the frequency domain resource position.
2. The method of claim 1, wherein the generating downlink control information according to the frequency domain repetition number and the frequency domain resource allocation information comprises:
obtaining a frequency domain repetition frequency indication field value according to the frequency domain repetition frequency; obtaining a frequency domain resource allocation indication field value according to the frequency domain resource allocation information;
and generating the downlink control information according to the frequency domain repetition number indication field value and the frequency domain resource allocation indication field value.
3. The method according to claim 2, wherein said deriving a frequency domain repetition indication field value according to the frequency domain repetition comprises:
acquiring an idle field in the downlink control information;
selecting a preset number of the idle fields as frequency domain repetition time indication fields, and determining frequency domain repetition time indication field values corresponding to the frequency domain repetition time indication fields according to the frequency domain repetition times.
4. The method according to claim 3, wherein the selecting a preset number of the idle fields as frequency domain repetition number indication fields, and determining a frequency domain repetition number indication field value corresponding to the frequency domain repetition number indication fields according to the frequency domain repetition number comprises:
coding the frequency domain repetition times to obtain a frequency domain repetition time indication field value;
taking the digits of the frequency domain repetition number indication field value as a preset number, and selecting the idle fields with the preset number as frequency domain repetition number indication fields;
and filling the frequency domain repetition indication field value into the frequency domain repetition indication field.
5. The method according to any one of claims 1 to 4, wherein before the allocating frequency-domain resources according to the frequency-domain repetition times corresponding to the source data to obtain the frequency-domain resource allocation information, the method further comprises:
acquiring a service quality grade parameter corresponding to the source data;
and determining the frequency domain repetition times corresponding to the source data according to the service quality grade parameter.
6. The method according to any one of claims 1 to 4, wherein before the allocating frequency-domain resources according to the frequency-domain repetition times corresponding to the source data to obtain the frequency-domain resource allocation information, the method further comprises:
acquiring communication environment parameters corresponding to the terminal;
and determining the frequency domain repetition frequency corresponding to the source data according to the communication environment parameters.
7. An information transmission method, applied to a terminal, the method comprising:
receiving downlink control information sent by a network device; the downlink control information is generated according to frequency domain resource allocation information and frequency domain repetition times corresponding to the source data, and the frequency domain resource allocation information is obtained by allocating frequency domain resources according to the frequency domain repetition times corresponding to the source data;
confirming the frequency domain resource position corresponding to the frequency domain resource allocation information according to the downlink control information;
and transmitting the source data and the repeated data corresponding to the source data according to the frequency domain resource position.
8. An information transmission apparatus, applied to a network device, the apparatus comprising:
the resource allocation module is configured to allocate frequency domain resources according to the frequency domain repetition times corresponding to the source data to obtain frequency domain resource allocation information;
a control information generation module configured to generate downlink control information according to the frequency domain repetition times and the frequency domain resource allocation information;
a control information sending module, configured to send the downlink control information to a terminal, so that the terminal determines, according to the downlink control information, a frequency domain resource location corresponding to the frequency domain resource allocation information, and transmits, according to the frequency domain resource location, the source data and the repeated data corresponding to the source data.
9. An information transmission apparatus, applied to a terminal, the apparatus comprising:
a control information receiving module configured to receive downlink control information transmitted by a network device; the downlink control information is generated according to frequency domain resource allocation information and frequency domain repetition times corresponding to the source data, and the frequency domain resource allocation information is obtained by allocating frequency domain resources according to the frequency domain repetition times corresponding to the source data;
a resource confirming module configured to confirm a frequency domain resource position corresponding to the frequency domain resource allocation information according to the downlink control information;
and the data receiving module is configured to transmit the source data and the repeated data corresponding to the source data according to the frequency domain resource position.
10. An electronic device, comprising:
a processor; and
a memory for storing one or more programs that, when executed by the one or more processors, cause the one or more processors to implement the information transmission method of any of claims 1 to 7.
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