CN111385748B - Data transmission method and device, user equipment and computer storage medium - Google Patents

Data transmission method and device, user equipment and computer storage medium Download PDF

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CN111385748B
CN111385748B CN201811654880.9A CN201811654880A CN111385748B CN 111385748 B CN111385748 B CN 111385748B CN 201811654880 A CN201811654880 A CN 201811654880A CN 111385748 B CN111385748 B CN 111385748B
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data
modulation data
resource
receiving
layered modulation
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CN111385748A (en
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龚政委
陈雁
吴亮
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/04—Error control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H04W4/46—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for vehicle-to-vehicle communication [V2V]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/021—Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

The application provides a data transmission method, which comprises the following steps: a receiving node receives first layered modulation data sent by a sending node, wherein the first layered modulation data comprises k layers of data, each layer of data in the first layered modulation data is independently coded and independently processed by power, and k is an integer greater than or equal to 2; and under the condition that the data of a predetermined i layer in the first layered modulation data is determined to be correctly decoded, transmitting second layered modulation data, wherein the second layered modulation data comprises the data of the predetermined i layer which is correctly decoded, and i is a positive integer less than or equal to k. By implementing the scheme, the multi-layer data can be broadcast and transmitted in a layered modulation and cooperative forwarding mode, and the broadcast transmission efficiency of the multi-layer information is improved.

Description

Data transmission method and device, user equipment and computer storage medium
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a data transmission method and apparatus, a user equipment, and a computer storage medium.
Background
Modern society has stepped into the information age, and communication becomes an indispensable part of people's life, and with the explosive growth of data volume in information networks and the access of a large number of terminals, it becomes a research hotspot of communication technology to utilize limited communication resources to achieve higher transmission efficiency in view of the scene of long-distance broadcast coverage.
Time-frequency broadcast transmission based on layered multiplexing (LDM) can realize broadcast transmission after superimposing modulation symbols corresponding to two layers of data streams on the same resource unit, where the two layers of modulation symbols are respectively a base layer modulation symbol and an enhancement layer modulation symbol, the different layers of modulation symbols bear bit data of different Quality of Service (QoS), and realize different levels of protection for the bit data of different QoS, thereby ensuring that the coverage of the base layer information is wider than that of the enhancement layer information, and being a typical multi-level high-efficiency broadcast mechanism. In addition, multi-user superposition transmission (MUST) is a technology that enables a near-end user to eliminate interference of information of a far-end user at a receiving side by distributing different transmission powers to modulated data of the far-end user at a transmitting end and then superposing and transmitting the modulated data, so that the information of a plurality of users can be ensured to realize broadcast transmission on the same resource unit. Both the two technologies can improve the transmission efficiency of information in limited communication resources, but the broadcast transmission based on the LDM is the superposition transmission of two parts of information based on two predefined transmission parameters, the transmission mode is not flexible enough, and is only suitable for a scene of one-time broadcast transmission; the MUST is suitable for the same node to send different information to different receiving nodes, and the useful information in different information is different for different receiving nodes, i.e. the different information contains useless information for different receiving nodes, and is not suitable for broadcasting and sending a plurality of useful different information to a plurality of nodes on the same resource unit.
Disclosure of Invention
The application discloses a data transmission method, related equipment and a computer storage medium, which can broadcast and send multilayer data in a layered modulation and cooperative forwarding mode, and improve the broadcast sending efficiency of the multilayer data.
In a first aspect, the present application provides a data transmission method, where the method includes:
a receiving node receives first hierarchical modulation data from a transmitting node, wherein the first hierarchical modulation data comprises k layers of data, each layer of data in the first hierarchical modulation data is independently coded and independently processed by power, and k is an integer greater than or equal to 2;
and under the condition that the data of a predetermined i layer in the first layered modulation data is determined to be correctly decoded, transmitting second layered modulation data, wherein the second layered modulation data comprises the data of the predetermined i layer which is correctly decoded, and i is a positive integer less than or equal to k.
In the above scheme, a sending node modulates data to be sent by a hierarchical modulation technology to obtain first hierarchical modulation data containing multilayer data, and then broadcasts and sends the first hierarchical modulation data, after a receiving node in a broadcast area receives the first hierarchical modulation data, the receiving node forwards second hierarchical modulation data containing the preset i-layer data under the condition that the preset i-layer data in the first hierarchical modulation data is correctly decoded, and broadcasts and sends the multilayer data by means of hierarchical modulation and cooperative forwarding, so that the broadcast sending efficiency of the multilayer data can be improved. It is understood that after the receiving node forwards the second hierarchical modulation data to the first node, any one or more nodes in the first node will also forward the second hierarchical modulation data in case that it is determined that the predetermined i-layer data in the received data is decoded correctly, so that the second hierarchical modulation data can be forwarded through different nodes. The data is modulated in a layered mode to obtain layered modulation data, and the layered modulation data is broadcast and sent in a multi-node multi-time cooperative forwarding mode, so that the user equipment at the edge of a broadcast area can receive the layered modulation data forwarded by other nodes, and the source node does not need to send the layered modulation data at the edge of the broadcast area correctly even if the user equipment at the edge of the broadcast area receives the layered modulation data once, so that the transmitting power of the source node can be reduced, the interference among broadcast channels is reduced, and the efficiency of multi-layer data transmission is improved.
With reference to the first aspect, in a first possible implementation manner of the first aspect, before the receiving node receives the first layered modulation data sent by the sending node, the method further includes:
receiving first receiving resource information indicating a first receiving resource for receiving the first layered modulation data, wherein the first receiving resource information is carried in a pre-configuration signaling;
the receiving node receives first layered modulation data from a transmitting node, comprising:
the receiving node receives the first layered modulation data based on the first reception resource.
With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, before the receiving node receives the first layered modulation data from the sending node, the method further includes:
a receiving node receives first dynamic control information, wherein the first dynamic control information comprises data layer number information of the first layered modulation data and a resource indication of a first receiving resource for receiving the first layered modulation data;
the receiving node receives first layered modulation data from a transmitting node, comprising:
the receiving node receives the first layered modulation data based on the first reception resource.
With reference to the first aspect or the first or second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the sending the second layered modulation data includes:
the receiving node sends the second layered modulation data based on a first sending resource, where a frequency domain resource corresponding to the first sending resource is the same as a frequency domain resource corresponding to the first receiving resource, a position of a time domain resource corresponding to the first sending resource in a unit time resource is the same as a position of a time domain resource corresponding to the first receiving resource in the unit time resource, and the position of the time domain resource in the unit time resource is information of a basic unit corresponding to the time domain resource in the unit time resource after the unit time resource is divided according to the basic unit of the time domain resource.
With reference to the first aspect or any one of the first to third possible embodiments of the first aspect, in a fourth possible embodiment of the first aspect,
the receiving node sends second dynamic control information based on a second sending resource, wherein the content of the second dynamic control information is the same as the content of the first dynamic control information, the frequency domain resource corresponding to the second sending resource is the same as the frequency domain resource occupied by the first dynamic control information, the position of the time domain resource corresponding to the second sending resource in the unit time resource is the same as the position of the time domain resource occupied by the first dynamic control information in the unit time resource, and the position of the time domain resource in the unit time resource refers to the information of a corresponding basic unit of the time domain resource in the unit time resource after the unit time resource is divided according to the basic unit of the time domain resource.
With reference to the first aspect or any one of the first to the fourth possible implementation manners of the first aspect, in a fifth possible implementation manner of the first aspect, in a case that it is determined that the predetermined i-layer data in the first layered modulation data cannot be decoded correctly, the receiving node receives third layered modulation data, where the third layered modulation data includes the predetermined i-layer data in the first layered modulation data.
By implementing the above embodiment, the receiving node may receive data sent by multiple sending nodes for multiple times, and further combine the data received for multiple times to obtain the predetermined i-layer data.
With reference to the first aspect or any one of the first to fourth possible implementation manners of the first aspect, in a sixth possible implementation manner of the first aspect, the first hierarchical modulation data includes first location information of a source node, where the first location information represents a first geographical location where the source node generates the first hierarchical modulation data;
the transmitting the second layered modulation data includes:
the receiving node acquires a second geographic position, wherein the second geographic position represents the geographic position of the receiving node;
and under the condition that the distance between the first geographical position and the second geographical position is smaller than a preset distance, the receiving node sends the second hierarchical modulation data, wherein the second hierarchical modulation data comprises the first position information.
With reference to the first aspect or any one of the first to the sixth possible implementation manners of the first aspect, in a seventh possible implementation manner of the first aspect, the sending the second hierarchical modulation data when it is determined that predetermined i-layer data in the first hierarchical modulation data is decoded correctly further includes:
when the sending times of the second hierarchical modulation data are less than or equal to the preset forwarding times, the receiving node sends the second hierarchical modulation data; alternatively, the first and second electrodes may be,
when there are available transmission resources for transmitting the second layered modulation data, the receiving node transmits the second layered modulation data on the available transmission resources for transmitting the second layered modulation data.
By implementing the above embodiment, the number of times of data forwarding is limited by the distance between the receiving node and the source node when hierarchical modulation data is generated or the number of times of data ready to be forwarded by the receiving node has been forwarded, so as to prevent the data from being forwarded indefinitely, which results in waste of resources of the receiving node.
In a second aspect, an embodiment of the present application provides a data transmission apparatus, where the apparatus includes:
a receiving unit, configured to receive first layered modulation data from a sending node, where the first layered modulation data includes k layers of data, each layer of data in the first layered modulation data is independently encoded and independently power-processed, and k is an integer greater than or equal to 2;
a processing unit, configured to determine whether predetermined i-layer data in the first hierarchical modulation data can be decoded correctly, where i is a positive integer less than or equal to k;
and a transmitting unit, configured to transmit second layered modulation data when the processing unit determines that predetermined i-layer data in the first layered modulation data is correctly decoded, where the second layered modulation data includes the predetermined i-layer data that is correctly decoded.
With reference to the second aspect, in a first possible implementation manner of the second aspect, the receiving unit is further configured to: receiving first receiving resource information before receiving first layered modulation data from a sending node, wherein the first receiving resource information indicates a first receiving resource for receiving the first layered modulation data, and is carried in pre-configuration signaling;
the receiving unit receives first layered modulation data from a transmitting node, and includes:
the receiving unit receives the first layered modulation data based on the first reception resource.
With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the receiving unit is further configured to: before receiving first layered modulation data from a sending node, a receiving node receives first dynamic control information, wherein the first dynamic control information comprises data layer number information of the first layered modulation data and a resource indication of a first receiving resource for receiving the first layered modulation data;
the receiving unit receives first layered modulation data from a transmitting node, and includes:
the receiving unit receives the first layered modulation data based on the first reception resource.
With reference to the second aspect or the first or second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect,
the sending unit is further configured to: and transmitting the second hierarchical modulation data based on a first transmission resource, wherein a frequency domain resource corresponding to the first transmission resource is the same as a frequency domain resource corresponding to the first receiving resource, a position of a time domain resource corresponding to the first transmission resource in a unit time resource is the same as a position of a time domain resource corresponding to the first receiving resource in the unit time resource, and the position of the time domain resource in the unit time resource is information of a basic unit corresponding to the time domain resource in the unit time resource after the unit time resource is divided according to the basic unit of the time domain resource.
With reference to the second aspect or any one of the first to third possible embodiments of the second aspect, in a fourth possible embodiment of the second aspect,
the sending unit is further configured to: and sending second dynamic control information based on a second sending resource, wherein the content of the second dynamic control information is the same as that of the first dynamic control information, the frequency domain resource corresponding to the second sending resource is the same as the frequency domain resource occupied by the first dynamic control information, the position of the time domain resource corresponding to the second sending resource in the unit time resource is the same as that of the time domain resource occupied by the first dynamic control information in the unit time resource, and the position of the time domain resource in the unit time resource refers to the information of a basic unit corresponding to the time domain resource in the unit time resource after the unit time resource is divided according to the basic unit of the time domain resource.
With reference to the second aspect or any one of the first to the fourth possible implementation manners of the second aspect, in a fifth possible implementation manner of the second aspect, the receiving unit is further configured to receive third layered modulation data in a case that it is determined that the predetermined i-layer data in the first layered modulation data is not correctly decoded, where the third layered modulation data includes the predetermined i-layer data in the first layered modulation data.
With reference to the second aspect or any one of the first to fifth possible implementations of the second aspect, in a sixth possible implementation of the second aspect, the first hierarchically modulated data includes first location information of a source node, the first location information being indicative of a first geographical location at which the source node generated the first hierarchically modulated data;
the processing unit is further configured to obtain a second geographic location, where the second geographic location represents a geographic location of the data transmission device;
the transmitting unit is further configured to transmit the second layered modulation data when a distance between the first geographic location and the second geographic location is smaller than a preset distance, where the second layered modulation data includes the first location information.
With reference to the second aspect or any one of the first to sixth possible implementation manners of the second aspect, in a seventh possible implementation manner of the second aspect, the sending unit is further configured to send the second hierarchical modulation data when it is determined that predetermined i-layer data in the first hierarchical modulation data is decoded correctly and the number of times of sending the second hierarchical modulation data is less than or equal to a predetermined number of times of forwarding; alternatively, the first and second electrodes may be,
transmitting the second layered modulation data on the available transmission resources for transmitting the second layered modulation data, in case it is determined that predetermined i-layer data in the first layered modulation data is correctly decoded and there are available transmission resources for transmitting the second layered modulation data.
In a third aspect, the present application provides a user equipment comprising a processor, a transceiver, and a memory; the memory is configured to store instructions, the processor is configured to execute the instructions, and the transceiver is configured to receive and/or transmit data; wherein the instructions, when executed by the processor, cause the user equipment to perform the method as described in the first aspect or any possible implementation manner of the first aspect.
In a fourth aspect, the present application provides a computer storage medium storing a computer program which, when executed by a processor, causes an apparatus in which the processor is installed to implement the method according to the first aspect.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present application, the drawings required to be used in the embodiments or the background art of the present application will be described below.
Fig. 1 is a schematic view of an application scenario of a data transmission method provided in the present application;
FIG. 2 is a schematic flow chart of a data transmission method provided in the present application;
FIG. 3 is a schematic diagram of a receiving node receiving and forwarding data provided by the present application;
FIG. 4 is a schematic diagram of an independent encoding provided herein;
FIG. 5 is a schematic diagram of another receiving node provided by the present application receiving and forwarding data;
FIG. 6 is a schematic diagram of another data forwarding method provided in the present application;
fig. 7 is a schematic view of an application scenario of a data transmission method provided in the present application;
FIG. 8 is a schematic structural diagram of a data transmission device provided in the present application;
fig. 9 is a schematic structural diagram of a network device provided in the present application.
Detailed Description
In a wireless cellular communication system, different data transmission methods are usually designed according to different scene requirements, but different transmission methods have different limitations, for example, in services such as a broadcast multicast service (MBMS), etc., a transmission parameter of a broadcast channel is mainly designed based on the reception quality of a user at the farthest end of a broadcast area, so as to ensure that broadcast information transmitted by a transmitting node can be stably and correctly received by users in the whole broadcast area.
In multi-user superposition transmission (MUST), different transmission powers are allocated to different users at a sending node according to a certain transmission power allocation criterion, so as to realize non-orthogonal transmission of multi-user information, and after receiving multi-user information sent by the sending node, a target user device eliminates information belonging to other users through a Successive Interference Cancellation (SIC) algorithm and obtains information of the target user. However, the MUST is suitable for the same node to send different information to different nodes, but not for a single or multiple nodes to send the same information to multiple nodes.
With the development of communication technology, more and more scenes in production or life need to be applied to communication technology, and different new scenes have new requirements for broadcast communication, so that a new data transmission mode needs to be designed to meet the new requirements, for example, in a V2X (vehicle to electronic) scene, if a car accident occurs, a vehicle-mounted terminal of the car needs to broadcast car accident information to all other cars in the surrounding area, and the car accident information includes various types of information, such as a car accident position, a field lane occupation condition, a car accident type, a traffic jam condition, etc., the car accident information is important for all cars in the area, and the cars in the area need to be received, but the important degrees of different types of information are different, such as the car accident position and the traffic jam condition, it is necessary to ensure that the cars far away from the area can be correctly received by one-time reception, therefore, the route can be re-planned, and the information with lower importance, such as the traffic accident type, the lane occupation condition and the like, only needs to be correctly received by a part of vehicles with shorter distance. If the traditional broadcast is adopted, different types of information need to adopt different QoS (quality of service) to target that the marginal vehicles can correctly receive, and larger transmission power is needed, which causes larger interference; the LDM broadcasting method can only broadcast traffic accident information once, and cannot ensure that less important information is received by edge vehicles, and the MUST transmission method is to transmit information of different users to different nodes, so the above methods are not suitable for data transmission requirements in the V2X scenario.
In order to solve the problems, the application provides a data transmission mode which can solve the problem of data transmission in a new scene.
The method provided by the present application may be applied to a 5G new radio-to-radio (NR) technology network or other future communication systems adopting various radio access technologies, and may also be applied to V2V (vehicle-to-vehicle) or V2X in the internet of vehicles and communication systems in master-slave mode, etc., as long as the system includes at least one sending node (source node) and a plurality of receiving nodes, and the plurality of receiving nodes may serve as relay nodes, and after a certain receiving node receives data sent by the source node or the relay node, if the data meets a predetermined condition, the receiving node may forward the received data.
In a specific embodiment, as shown in fig. 1, a network device and a terminal device 1 to a terminal device 4 form a communication system, in the communication system, both the network device and the terminal device may be used as source nodes, and both the terminal devices may be used as receiving nodes for receiving data sent by the source nodes or the relay nodes.
The network device may be an entity for transmitting or receiving signals at the network side, such as a new generation base station (gnnodeb); the device may be a device for communicating with a mobile device, an Access Point (AP) in a Wireless Local Area Network (WLAN), a base station (BTS) in a global system for mobile communication (GSM) or Code Division Multiple Access (CDMA), a base station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA), an evolved node B (eNB, or eNodeB) in a Long Term Evolution (LTE), or a relay station or access point, or a network device in a vehicle-mounted device, a wearable device, and a network device in a future evolved Public Land Mobile Network (PLMN) network, or a network NR system in a 5G network, and the like.
The terminal device may be an entity for receiving or transmitting signals at the user side, such as a new generation user equipment (gnee). A terminal device can also be called an access terminal, subscriber unit, subscriber station, mobile, remote station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or user equipment. The terminal device may be a Station (STA) in the WLAN, and may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, and a next generation communication system, for example, a terminal device in a fifth-generation communication (5G) network or a terminal device in a Public Land Mobile Network (PLMN) network for future evolution, a terminal device in a new wireless communication system, and the like. In the embodiment of the present invention, the terminal device may also be a wearable device, and the wearable device may also be referred to as a wearable smart device, which is a generic term for intelligently designing daily wearing and developing wearable devices by applying a wearable technology, such as glasses, gloves, and watches.
Referring to fig. 2, fig. 2 is a flowchart illustrating an information transmission method according to an embodiment of the present application, and as shown in fig. 1, the data transmission method according to the embodiment of the present application includes:
s102, the receiving node receives the first layered modulation data sent by the sending node.
The first layered modulation data comprises k layers of data which are modulated by a layered modulation technology and then are superposed, k is an integer which is greater than or equal to 2, and each layer of data in the first layered modulation data is independently coded and independently processed by power. Specifically, the information source bits corresponding to the k-layer data are respectively subjected to independent channel coding, rate matching and modulation to obtain a modulation symbol s corresponding to each layer of datajJ is a positive integer less than or equal to k, and then modulation symbols s of any one of k layers of modulation symbolsjCorresponding power coefficient pjMultiply and then superpose to obtain a superposed multilayer modulation symbol of
Figure BDA0001931499370000071
And the data carried by the multi-layer modulation symbol is the first layered modulation data.
Optionally, the multi-layer modulation symbols may also be bit mapped, so that the corresponding constellation points satisfy gray mapping. The modulation method includes, but is not limited to, Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK), 16 Quadrature Amplitude Modulation (QAM), 64QAM, and 256 QAM. The modulation scheme is generally represented by a modulation order, where a modulation order 1 corresponds to BPSK, a modulation order 2 corresponds to QPSK, a modulation order 4 corresponds to 16QAM, a modulation order 6 corresponds to 64QAM, and a modulation order 8 corresponds to 256 QAM.
It is to be understood that, when the transmitting node performs independent encoding and independent power processing on each layer of data corresponding to the k-layer data, each layer of data may be assigned a layer number, where j is 1,2, and 3 … … k. The sending node independently encodes each layer of data means that after the sending node acquires data to be sent, the sending node firstly carries out serial-to-parallel conversion on input serial binary data to obtain k layer of data, and then carries out channel encoding on each layer of data in the k layer of data according to Modulation and Coding Scheme (MCS) corresponding to each layer of data of the k layer of data respectively to obtain k bit groups to be modulated corresponding to the k layer of data. As shown in fig. 3, a transmitting node converts binary data into k-layer data, and then performs channel coding on each layer of data to obtain a bit group to be modulated corresponding to each layer of data, where b isjmRepresenting the mth bit in the jth group of modulated bits. The step of the sending node performing independent power processing on each layer of data in the first layered modulation data means that: each layer of data has its own corresponding power parameter, and the transmitting node performs power processing on the corresponding layer of data according to the power parameter corresponding to each layer of data, that is, configures corresponding transmitting power for each layer of data in the first hierarchical modulation data, so that each layer of data in the first hierarchical data can be transmitted with the configured power. In an embodiment, a larger transmission power may be configured for a partial layer, and a smaller transmission power may be configured for a partial layer, for example, a maximum transmission power is allocated to the first layer data with layer number 1 in the first layered modulation data, and the transmission power of the second layer data to the k-th layer data decreases step by step, that is, the above work is performedCoefficient of rate p1>p2>……>pkTherefore, the layer data with higher transmission power can be received and correctly decoded by the nodes at the broadcasting edge, and the layer data with lower transmission power can only be correctly received by the nodes which are closer to the transmitting node. It should be noted that, in the embodiments of the present application, correct receiving refers to that a receiving node receives data and can correctly decode the received data.
In this embodiment of the present application, the sending node includes one or more of the source node and the relay node, the relay node is a node that correctly receives the predetermined i-layer data in the first hierarchical modulation data and forwards the first hierarchical modulation data after the source node sends the first hierarchical modulation data, the relay node may be one node, or two or more nodes, and the receiving node may be one receiving node, or two or more receiving nodes, which is not limited in this embodiment of the present application.
And S104, transmitting second hierarchical modulation data under the condition that the preset i-layer data in the first hierarchical modulation data is correctly decoded.
It can be understood that after the transmitting node broadcasts and transmits the first hierarchical modulation data including k-layer data, due to data transmission distance, signal interference, signal attenuation, and the like, demodulation results of different receiving nodes for the received first hierarchical modulation data are different, and after the receiving node receives the first hierarchical modulation data transmitted by the transmitting node, not all k-layer data can be correctly decoded, for example, a receiving node closer to the transmitting node can correctly decode all k-layer data, and a receiving node farther away from the transmitting node can only correctly decode partial layered data in the k-layer data. The correct decoding means that after each layer of data is subjected to independent channel decoding, check information of Cyclic Redundancy Check (CRC) corresponding to the layer of data is correct.
Therefore, after receiving the first hierarchical modulation data sent by the sending node, the receiving node needs to perform independent channel decoding on each layer of data in the first hierarchical modulation data to obtain decoded data corresponding to each layer of data in the hierarchical modulation data, and then determines whether each layer of data is decoded correctly by using a CRC algorithm. And under the condition that the preset i-layer data can be decoded correctly, the receiving node modulates and encodes the correctly received decoding data corresponding to the layered modulation data at least comprising the preset i-layer data to obtain second layered modulation data and sends the second layered modulation data.
In this embodiment, the second hierarchical modulation data includes the predetermined i-layer data that is correctly decoded, where i is a positive integer less than or equal to k. The second hierarchical modulation data may only include the predetermined i-layer data, or may include the predetermined i-layer data and any other one or more layers of data that can be decoded correctly. That is, as long as there are data greater than or equal to i layers in the second hierarchical modulation data that can be correctly decoded and these data that can be correctly decoded include the predetermined i-layer data, the receiving node can transmit the second hierarchical modulation data.
It can be understood that, when the transmitting node performs independent encoding and independent power processing on the k-layer data, if the power allocated to the layer data with the smaller layer number is larger, the data with the smaller layer number is more easily (or more likely) to be correctly received by the receiving node, and when the layer number of the data that can be correctly decoded by the receiving node is n, the layer number set corresponding to the layer data that can be correctly decoded by the receiving node is likely to be {1,2, … …, n }; or, when the transmitting node performs independent encoding and independent power processing on the k-layer data, if the power allocated to the layer data with the larger layer number is larger, the data with the larger layer number is more easily (or more likely) correctly received by the receiving node, and when the number of layers of data which can be correctly decoded by the receiving node is n, the layer number set corresponding to the layer data which can be correctly decoded by the receiving node may be { k-n +1, k-n +2, … …, k }.
In an embodiment, in case i equals k, the second layered modulation data comprises all k layers of data correctly decoded in the first layered modulation data. In another embodiment, if i is smaller than k and the predetermined i-layer data is the first i-layer data in the k-layer data, then the second layered modulation data comprises correctly decoded i-layer data, and the corresponding layer number set of the i-layer data is {1,2, … …, i }. In yet another embodiment, if i is smaller than k and the predetermined i-layer data is the following i-layer data in the k-layer data, then the second layered modulation data comprises the correctly decoded i-layer data, and the corresponding layer number set of the i-layer data is { k-i +1, k-i +2, … …, k }. In another embodiment, i is smaller than k, the predetermined i-layer data may be i-layer data with discontinuous layer numbers, for example, if the first layered modulation data includes 6-layer data, the second layered modulation data includes 3-layer data that is correctly decoded, i is equal to 6, and i is equal to 3, and the layer number corresponding to the 3-layer data included in the second layered modulation data may be {1,2,4}, may be {1,3,5}, may also be {2,4,6}, and the like, which is not limited in this embodiment of the application.
By implementing the embodiment of the application, a sending node modulates data to be sent through a hierarchical modulation technology to obtain first hierarchical modulation data containing multilayer data and then broadcasts and sends the first hierarchical modulation data, after a receiving node in a broadcasting area receives the first hierarchical modulation data, the receiving node forwards second hierarchical modulation data containing the preset i-layer data under the condition that the preset i-layer data in the first hierarchical modulation data is correctly decoded, the data is hierarchically modulated to obtain the hierarchical modulation data, and the hierarchical modulation data is broadcasted and sent in a cooperative forwarding mode, so that the broadcasting and sending efficiency of the multilayer data can be improved. It is understood that after the receiving node forwards the second hierarchical modulation data to the first node, any one or more nodes in the first node will also forward the second hierarchical modulation data in case that it is determined that the predetermined i-layer data in the received data is decoded correctly, so that the second hierarchical modulation data can be forwarded through different nodes. The data is modulated in a layered mode to obtain layered modulation data, and the layered modulation data is broadcast and sent in a multi-node multi-time cooperative forwarding mode, so that the user equipment at the edge of a broadcast area can receive the layered modulation data forwarded by other nodes, and the source node does not need to send the layered modulation data at the edge of the broadcast area correctly even if the user equipment at the edge of the broadcast area receives the layered modulation data once, so that the transmitting power of the source node can be reduced, the interference among broadcast channels is reduced, and the efficiency of multi-layer data transmission is improved. Furthermore, the transmitting node allocates different transmitting powers to each layer of data in the first hierarchical modulation data and transmits the data, so that the node at the edge of the broadcast area can correctly receive the part of hierarchical data with higher transmitting power in the first hierarchical modulation data.
In this embodiment of the application, in step S104, before the receiving node sends the second layered modulation data, the receiving node needs to determine a first sending resource for sending the second layered modulation data, and then sends the second layered modulation data based on the first sending resource. Because there may be more than one receiving node capable of forwarding the second hierarchical modulation data in an actual system, when multiple receiving nodes forward the second hierarchical modulation data at the same time and ensure that other receiving nodes can correctly receive the second hierarchical modulation data, it is necessary to ensure that the first transmission resources used by the second hierarchical modulation data forwarded by the multiple receiving nodes are the same, and ensure that the second hierarchical modulation data forwarded by the multiple receiving nodes at the same time can be superimposed on the same resources, so that the probability that other receiving nodes successfully receive the second hierarchical modulation data can be improved.
It can be understood that the transmission resource information that the node needs to determine when transmitting data includes one or more of time domain resource information, frequency domain resource information, space domain resource information, and modulation coding information. The frequency domain resource may be one or more Resource Blocks (RBs), one or more Resource Elements (REs), one or more carriers (carriers), or one or more bandwidth parts (BWPs), and includes, corresponding to the first transmission resource, starting physical resource block information, ending physical resource block information, number of physical resource blocks, sub-band (SB) information, carrier information, BWP information, and the like for mapping second hierarchical modulation data. The time domain resource may be one or more subframes, may be one or more slots, or may be one or more symbols on one or more slots, and includes start symbol information, stop symbol information, number of symbols, slot information, subframe information, and the like for mapping the second layered modulation data, corresponding to the first transmission resource. The airspace resource information may include information of a starting antenna port number, information of a cutoff antenna port number, the number of antenna port numbers, and the like, which are used for mapping the second layered modulation data; the coded modulation information may include Modulation Coding Scheme (MCS) information, process number information, coded redundancy version information, power allocation information, and the like corresponding to scheduling of second layered modulation data, where the MCS information includes a Modulation Coding Scheme (MCS) corresponding to each layer of data in the first layered modulation data, so that after the receiving node receives the first layered modulation data sent by the sending node, the receiving node decodes the first layered modulation data based on the MCS to obtain decoded data, and after it is determined that the first layered modulation data includes the predetermined i-layer data, the receiving node modulates and codes the decoded data including the predetermined i-layer data according to the MCS to obtain the second layered modulation data.
Optionally, the receiving node determines, by obtaining first transmission resource information, a first transmission resource for transmitting the second hierarchical modulation data, and the receiving node may obtain the first transmission resource information in the following three ways:
the first mode is as follows:
the receiving node receives a first pre-configured signaling sent by a network side device, and acquires the first transmission resource information from the first pre-configured signaling, as shown in fig. 1, where the network side device is a base station, the first pre-configured signaling may be Radio Resource Control (RRC) signaling, and the receiving node acquires the first transmission resource information by receiving the RRC signaling sent by the base station. The first transmission resource information includes two parts of resource information, where the first resource information is used to indicate resources that the receiving node can use to transmit layered modulation data in the communication system shown in fig. 1, such as at least one of subframe information and slot information in a time domain resource, at least one of carrier information and BWP information in a frequency domain information; the second resource information is used to indicate resources that can be used by the receiving node when broadcasting layered modulation data in the communication system shown in fig. 1, and includes at least one of symbol information in time domain resource information, physical resource block information in frequency domain resource information, space domain resource information, and coded modulation information; for example, the physical resource block information includes starting physical resource block information and ending physical resource block information for mapping the layered modulation data; the symbol information comprises at least two information of initial symbol information, ending symbol information and symbol number used for mapping the layered modulation data; the coded modulation information includes MCS information, power allocation information, and the like corresponding to the scheduled layered modulation data, that is, the first resource information in the first transmission resource information is used to indicate resources that the receiving node can use to transmit data, and the second resource information indicates which resources the receiving node specifically uses to transmit the second layered modulation data, for example, the second resource information indicates that the receiving node modulates the second layered modulation data to the 3 rd symbol to the 7 th symbol of the first slot of one subframe.
It is to be understood that the first preconfigured signaling may be sent to all nodes in the communication system through a network side device, and after receiving the first layered modulation data, the receiving node, on the condition that it is determined that the predetermined i-layer data can be decoded correctly, determines, based on resource information in the first preconfigured signaling, first transmission resources such as time domain resources and frequency domain resources that can be used for sending the second layered modulation data, and sends the second layered modulation data based on the first transmission resources.
The second mode is as follows:
and the receiving node determines the first sending resource information by an indication mode of combining a second pre-configuration signaling and a predefined mode. The second preconfigured signaling includes first resource information in the first sending resource information in the first manner, and the content and function of the first resource information may refer to the description in the first manner, which is not described herein again, and the second preconfigured signaling may be RRC signaling. Second resource information in the first sending resource information is determined in a predefined manner, the predefined manner includes determining the second resource information of the first sending resource information according to first receiving resource information, and the first receiving resource information is used for indicating the receiving node to receive first receiving resources of the first hierarchical modulation data. For example, the second resource information in the first sending resource is the same as the first receiving resource information, and the first receiving resource information is the same as the second resource information in the first manner, which is not described herein again. Wherein the first receiving resource information may be sent to the receiving node through a third pre-configured signaling, which may be an RRC signaling.
By way of illustration in the two manners, a first transmission resource for the receiving node to transmit the second hierarchical modulation data is specifically determined by second resource information in the first transmission resource information, and the second resource information is the same as the first reception resource information, for example, a frequency domain resource corresponding to the first transmission resource is the same as a frequency domain resource corresponding to the first reception resource, and a position of a time domain resource corresponding to the first transmission resource in a unit time resource is the same as a position of a time domain resource corresponding to the first reception resource in the unit time resource. The position of the time domain resource in the unit time resource refers to information of a corresponding basic unit of the time domain resource in the unit time resource after the unit time resource is divided according to the basic unit of the time domain resource. For example, the unit time resource may be one subframe or one slot, where a basic unit of the time domain resource is an Orthogonal Frequency Division Multiplexing (OFDM) symbol, and then one subframe or one slot includes a plurality of OFDM symbols, where in this example, a position of the time domain resource in the unit time resource is OFDM symbol number information of the time domain unit, and includes at least two information of a starting OFDM symbol, an ending OFDM symbol, and a number of OFDM symbols. For example, the time domain resource of the first receiving resource for the receiving node to receive the first hierarchical modulation data is from symbol 3 to symbol 7 of the first time slot of one subframe, that is, the first hierarchical modulation data is carried in symbol 3 to symbol 7 of the first time slot of one subframe that the sending node sends to the receiving node, and after determining that the preset i-layer data can be correctly decoded, the receiving node also carries the second hierarchical modulation data in symbol 3 to symbol 7 of the first time slot of another subframe.
Taking the second manner as an example, a process in which a receiving node completes one receiving and forwarding is shown in fig. 4, a network side device sends a second preconfigured signaling and a third preconfigured signaling to the receiving node, the sending node sends the first hierarchical modulation data on a first sending resource, and the receiving node 1 and the receiving node 2 receive the first hierarchical modulation data at the same time, but only in data received by the receiving node 1, the predetermined i-layer data can be decoded correctly, and then the receiving node 1 forwards the second hierarchical modulation data based on the first sending resource, where the second hierarchical modulation data includes the predetermined i-layer data decoded correctly.
The third mode is as follows:
the receiving node determines the first sending resource information by an indication mode of combining a second pre-configuration signaling and first Dynamic Control Information (DCI). The second preconfigured signaling includes first resource information in the first sending resource information in the first manner, and the content and function of the first resource information may refer to the description in the first manner, which is not described herein again, and the second preconfigured signaling may be RRC signaling. Second resource information in the first sending resource information is determined by the first DCI received by a receiving node, where the first DCI includes data layer number information k of the first hierarchical modulation data and a resource indication of a first receiving resource where the receiving node receives the first hierarchical modulation data, and the resource indication of the first receiving resource includes at least one of symbol information in time domain resource information, physical resource block information in frequency domain resource information, space domain resource information, and code modulation information; for example, the physical resource block information includes at least two of starting physical resource block information, ending physical resource block information, and the number of physical resource blocks for mapping the layered modulation data; the symbol information comprises at least two information of initial symbol information, ending symbol information and symbol number used for mapping the layered modulation data; the coded modulation information includes MCS information, power allocation information, and the like corresponding to the scheduling layered modulation data. The resource indication of the first reception resource indicates a first reception resource for the receiving node to receive the first layered modulation data. The second resource information in the first transmission resource is the same as the resource indication of the first reception resource in the first DCI.
It can be understood that, before the receiving node receives the first DCI, the receiving node further needs to receive second receiving resource information, where the second receiving resource information is used to instruct the receiving node to receive or monitor the receiving resource of the first DCI, and the second receiving resource information includes time slot information and symbol information in time domain resource information, physical resource block information in frequency domain resource information, space domain resource information, and coding modulation information; for example, the physical resource block information includes starting physical resource block information and ending physical resource block information for mapping the first DCI; the symbol information includes at least two kinds of information among start symbol information, end symbol information, and the number of symbols used for mapping the first DCI. The second receiving resource may be sent to the receiving node by means of a fourth pre-configured signaling, which may be an RRC signaling.
In this embodiment of the present application, if the receiving node determines the first sending resource information through the third method, the receiving node needs to send a second DCI before sending the second layered modulation data, where the content of the second DCI is the same as the content of the first DCI. It can be understood that, before transmitting the second DCI, the receiving node needs to determine a second transmission resource for transmitting the second DCI, and the second transmission resource may be determined by second transmission resource information. The second sending resource information is determined by combining a fifth pre-configuration instruction sent by a receiving network side device with the first DCI, where the fifth pre-configuration instruction includes a first part of the second sending resource information and indicates a resource that the receiving node can use to send dynamic control information in the communication system shown in fig. 1, such as at least one of subframe information and slot information in a time domain resource, at least one of carrier information and BWP information in a frequency domain resource, and the fifth pre-configuration signaling may be RRC signaling; the second part of the second transmission resource information is determined according to second reception resource information, that is, the second part of the second transmission resource information is the same as the second reception resource information.
Taking the third manner as an example, a process of completing one receiving and forwarding by a receiving node is shown in fig. 5, a network side device sends a fourth preconfigured signaling to the receiving node, the fourth preconfigured signaling being used to instruct the receiving node to receive a second receiving resource of the first DCI, the network side device sends a third preconfigured signaling to the receiving node, the third preconfigured signaling being used to instruct the receiving node to receive a first receiving resource of the first hierarchical modulation data, the network side device sends a second preconfigured signaling to the receiving node, the second preconfigured signaling being used to instruct the receiving node to be available for sending a resource of the hierarchical modulation data, the network side device sends a fifth preconfigured signaling to the receiving node, the fifth preconfigured signaling being used to instruct the receiving node to be available for sending a resource of dynamic control information, and the sending node sends the first DCI and the first hierarchical modulation data, the receiving node 1 and the receiving node 2 receive the first DCI and the first hierarchical modulation data simultaneously, but only in the data received by the receiving node 1, the predetermined i-layer data can be decoded correctly, the receiving node 1 determines a first transmission resource based on the information in the first DCI, determines a second transmission resource according to the second reception resource, transmits the second DCI on the second transmission resource, and transmits the second hierarchical modulation data on the first transmission resource, wherein the second hierarchical modulation data includes the predetermined i-layer data decoded correctly.
In a possible implementation manner, in step S104, in the case that the receiving node determines that the predetermined i-layer data can be decoded correctly, it needs to determine that the number of times that the receiving node sends the second hierarchical modulation data is less than or equal to the maximum forwarding number, and the receiving node can forward the second hierarchical modulation data; and if the sending times of the second hierarchical modulation data by the receiving node is greater than the preset forwarding times, the receiving node stops forwarding the second hierarchical modulation data. The maximum forwarding number may be determined by receiving a configuration signaling sent by the network side, where the configuration signaling may be RRC.
In one possible embodiment, the predetermined i-layer data includes first location information of a source node, where the first location information indicates a first geographical location where the source node generates the first hierarchical modulation data. The receiving node acquires a second geographic position where the receiving node is located currently under the condition that the predetermined i-layer data can be correctly decoded, and if the distance between the second geographic position and the first geographic position is smaller than a preset distance, the receiving node forwards the second hierarchical modulation data; or, if the distance between the second geographical location and the first geographical location is smaller than a preset distance, and the number of times of sending the second hierarchical modulation data by the receiving node is smaller than or equal to the maximum forwarding coefficient, the receiving node forwards the second hierarchical modulation data.
In a possible implementation manner, in a case that the receiving node determines that the predetermined i-layer data can be decoded correctly, the receiving node further needs to determine whether a first transmission resource which can be used for transmitting the second hierarchical modulation data is configured, and if the first transmission resource exists, the receiving node transmits the second hierarchical modulation data on the first transmission resource; or, when there is a first transmission resource available for transmitting the second hierarchical modulation data and the number of times that the receiving node transmits the second hierarchical modulation data is less than or equal to the maximum forwarding number, the receiving node transmits the second hierarchical modulation data; or, if there is a transmission resource available for transmitting the second hierarchical modulation data, the distance between the second geographical location and the first geographical location is less than a preset distance, and the number of times of transmitting the second hierarchical modulation data by the receiving node is less than or equal to the maximum number of times of forwarding, the receiving node forwards the second hierarchical modulation data.
That is, before the second node forwards the second hierarchical modulation data, it is necessary to determine whether the predetermined i-layer data is correctly received, and also to determine whether a preset forwarding condition is satisfied. The preset forwarding condition may be one or more of the forwarding conditions in the foregoing possible embodiment modes.
In a possible implementation, the first receiving resource includes a plurality of blocks of receiving resources, each of the plurality of blocks of receiving resources is configured to receive the first hierarchical modulation data once, and if the receiving node determines that the predetermined i-layer data in the first hierarchical modulation data cannot be decoded correctly after receiving the first hierarchical modulation data on a first block of receiving resources in the plurality of blocks of receiving resources, the receiving node may receive the first hierarchical modulation data again on other blocks of receiving resources in the plurality of blocks of receiving resources, and combine the data received multiple times until it is determined that the predetermined i-layer data in the received data can be decoded correctly.
Optionally, if the data sent by the sending node includes the first DCI, the receiving node may repeatedly receive the first DCI on a second receiving resource under the condition that predetermined i-layer modulation data in the first hierarchical data is not decoded correctly.
Optionally, if the number of times that the receiving node repeatedly receives the first hierarchical modulation data and/or the first DCI reaches the maximum number of times of repetition, the receiving node does not repeatedly receive any more.
The data is modulated by a hierarchical modulation technology to obtain hierarchical modulation data containing multilayer data, and then the hierarchical modulation data is sent, so that a receiving node, particularly a receiving node at the edge of a broadcast area, can combine the hierarchical modulation data received for many times, and thus predetermined i-layer data which can be decoded correctly is obtained, and a user equipment at the edge of the broadcast area can correctly receive the predetermined i-layer data without sending the data once by a source node, thereby reducing the transmitting power of the source node, reducing the interference among channels and improving the efficiency of data transmission.
The information transmission method in the present application is described below with reference to a specific application scenario.
As shown in fig. 1, fig. 1 is a possible application scenario of a data transmission method provided in the embodiment of the present application. In fig. 1, a cell includes a base station (source node) and 4 terminal devices, before the base station sends first hierarchical modulation data to the terminal device, the base station first sends a pre-configuration signaling through RRC signaling, where the pre-configuration information is used to configure i to be equal to 4, that is, in the cell, if a receiving node receives data that includes predetermined 4-layer data that can be decoded correctly, the receiving node may forward the received data. Then, the base station sends first DCI, where the first DCI includes a number k of data layers of the first hierarchical modulation data to be sent by the base station and a resource indication of a first receiving resource used for receiving the first hierarchical modulation data, and after receiving the first DCI, the terminal device receives the first hierarchical modulation data based on a time domain resource and a frequency domain resource indicated by first receiving resource information in the first DCI.
If k is equal to 6, after receiving the first DCI sent by the base station and the first hierarchical modulation data including 6-layer data, each terminal device independently decodes each layer of data in the received hierarchical data, and determines whether the predetermined 4-layer data can be decoded correctly. Since the terminal device 1 is closest to the base station, and the terminal device 1 determines that the predetermined layer 4 data in the layered data can be correctly decoded, the terminal device 1 may forward the second layered modulation data including the predetermined layer four data, the terminal device 1 first determines a first transmission resource for transmitting the second layered modulation and a second transmission resource for transmitting a second DCI, where the content of the second DCI is the same as that of the first DCI, the frequency domain resource corresponding to the first transmission resource is the same as that of the frequency domain resource corresponding to the first reception resource, the position of the time domain resource corresponding to the first transmission resource in the unit time resource is the same as that of the time domain resource corresponding to the first reception resource in the unit time resource, and the second transmission resource is the same as that of the second reception resource for receiving the first DCI by the terminal device, then, the terminal device 1 transmits the second DCI based on the second transmission resource and transmits the second layered modulation data based on the first transmission resource.
After the terminal device 1 transmits the second DCI and the second layered modulation data, the base station may continue to transmit the first DCI and the first layered modulation data. As shown in fig. 6, "receive (correct)" indicates that the predetermined 4-layer data in the data received by the corresponding terminal device can be correctly decoded, and "receive (error)" indicates that the predetermined 4-layer data in the data received by the corresponding terminal device cannot be correctly decoded in fig. 6. As can be seen from fig. 5, after the base station transmits the first hierarchical modulation data, only the terminal device 1 correctly receives the predetermined 4-layer data in the first hierarchical modulation data among the terminal devices 1 to 4, the terminal device 1 converts to the relay node to start forwarding the second hierarchical modulation data, the base station continues to transmit the first hierarchical modulation data, and the terminal devices 2 to 4 receive the data transmitted by the base station and the terminal device 1. If the terminal device 2 would receive the hierarchical modulation data sent by the terminal device 1 and the hierarchical modulation data sent by the base station again, if the terminal device 2 determines that the predetermined 4-layer data is correctly received after receiving the second hierarchical modulation data sent by the terminal device 1, or the terminal device 2 combines the three times of received data and determines that the predetermined 4-layer data is correctly received, the terminal device 2 is converted into a relay node to start forwarding the received data, and the terminal device 3 and the terminal device 4 receive the data sent by the base station, the terminal device 1 and the terminal device 2.
If it is set in the cell that each node can only transmit received data three times, any node exits from transmitting DCI and layered modulation data after transmitting DCI and layered modulation data three times, for example, after a base station transmits DCI and layered modulation data three times, the base station does not transmit DCI and layered modulation data any more, and after terminal device 1 transmits DCI and layered modulation data three times, terminal device 1 does not forward DCI and layered modulation data any more no matter whether user equipment correctly receives each layer of data in layered modulation data in terminal devices 2 to 4.
As shown in fig. 7, fig. 7 is another possible application scenario of the data transmission method provided in the embodiment of the present application. The data transmission method provided by the application can be applied to V2V (vehicle-to-vehicle) or V2X (vehicle-to-observing) of an internet of vehicles, as shown in fig. 7, vehicles 1 to 5 in fig. 7 all run on the road, if the vehicle 1 in fig. 7 runs and the vehicle-mounted device finds that a traffic accident occurs in front and causes road blockage, the vehicle-mounted device in the vehicle 1 serves as a source node to generate broadcast information, the broadcast information comprises an accident geographic position, a field traffic congestion degree, a lane occupancy, an accident severity degree, an accident handling progress and other information related to the traffic accident, and when the information is subjected to hierarchical modulation to obtain first hierarchical modulation data, a vehicle-mounted terminal on the vehicle 1 takes the accident geographic position and the field traffic congestion degree as the most important information, and modulates the information into the first hierarchical modulation data, namely first layer data L1, a first layer data L1, and a second layer data L, wherein the first layer data L is a second layer data L, and a second layer data L is a third layer data L, and a second layer data L, and a third layer data L is a third layer data L, and a fourth layer data is generated by which is generated by a third layer data which is generated by a third layer data which is generated by a data which is generated, Taking the lane occupation condition and the accident severity as second-layer data L2, taking the accident handling progress and other information related to the traffic accident as third-layer data L3, when the power distribution is carried out on the three-layer data, the maximum power in three layers is distributed to the first-layer information, so that the more important accident geographic position and the field traffic jam degree can be received and correctly decoded by more vehicles, and the lower power is distributed to other secondary information, and only the closer vehicle is required to receive and correctly decode.
For example, the broadcast information may be the following information: when the information is modulated in a layered mode, the information that traffic accidents happen from the north to the south on the scientific park road section, traffic can be recovered to be normal after twenty minutes is predicted is used as L1, the maximum power in three layers is distributed to send the information, the information that traffic accidents happen from the north to the south on the scientific park road section, traffic can be recovered to be normal after twenty minutes is predicted is used as L2, the information that the traffic accidents happen from the north to the south on the scientific park road section and the traffic can be recovered to be normal after twenty minutes is distributed to send the information, and the information that traffic accidents happen from the traffic park road section to the south on the scientific park road section and the traffic can be recovered to be normal after twenty minutes is predicted is used as L3 and the information that the traffic accidents happen to be normal after twenty minutes is distributed to be sent with the minimum power. After the vehicle 1 transmits the first hierarchical modulation data including the three layers of data, since the vehicle 2 is closest to the vehicle 1, the onboard equipment in the vehicle 2 can correctly decode each layer of data in the first hierarchical modulation data, since the vehicles 3 and 4 are farther from the vehicle 1, only L1 and L2 in the received first hierarchical modulation data can be correctly decoded, and since the vehicle 5 is farthest from the vehicle 1, only L1 in the received first hierarchical modulation data can be correctly decoded.
If the drive test equipment configuration i is equal to a value of 3 in the car networking system, the receiving node can forward the first hierarchical modulation data only when determining that each layer of data in the first hierarchical modulation data can be correctly decoded. After the vehicle 2 determines that each layer of the received first layered modulation data can be correctly decoded, the vehicle 2 transmits second layered modulation data based on the first transmission resource, the first transmission resource is the same as the first transmission resource of the vehicle 1 for transmitting the first layered modulation data, wherein the second layered modulation data transmitted by the vehicle 2 is completely the same as the first layered modulation data generated by the vehicle 1, and the transmission power allocated to each layer of the second layered modulation data by the vehicle 2 is the same as the transmission power allocated to each layer of the data by the vehicle 1, that is, the vehicle 2 forwards the first layered modulation data. The vehicles 3, 4 and 5 continue to receive the first hierarchical modulation data, after the vehicle 2 transmits the second hierarchical modulation data, the vehicles 3 and 4 can all correctly receive the L3 in the first hierarchical modulation data, the vehicles 3 and 4 forward the first hierarchical modulation data as the vehicle 2, the vehicles 5 can only correctly receive the L2 after receiving the first hierarchical modulation data forwarded by the vehicles 2, after the vehicles 3 and 4 forward the first hierarchical modulation data, the vehicles 5 continue to receive the first hierarchical modulation data, and after receiving the first hierarchical modulation data forwarded by the vehicles 3 and 4, the vehicles 5 combine the three times of received information to obtain three-layer data which can all be correctly decoded. In the foregoing example, the vehicle has described that the first hierarchical modulation data is forwarded only once, and it can be understood that the vehicle may also forward the first hierarchical modulation data multiple times, and this embodiment of the present application is not limited specifically.
In a possible embodiment, the first hierarchical modulation data includes first location information of a first location where the vehicle 1 is located when generating the first hierarchical modulation data, after other vehicles correctly receive each layer of data in the first hierarchical modulation data, second location information of a second location where the other vehicles are located is obtained, a distance between the first location and the second location is determined according to the first location information and the second location information, if the distance is smaller than a preset distance, the vehicle forwards the first hierarchical modulation data, and if the distance is greater than or equal to the preset distance, the receiving node does not forward the hierarchical modulation data. For example, when the vehicle 5 determines that the first hierarchical modulation data is correctly received, if the distance between the vehicle 5 and the vehicle 1 when generating the first hierarchical modulation data is smaller than the preset distance, the vehicle 5 forwards the first hierarchical modulation data, and if the distance between the vehicle 5 and the vehicle 1 when generating the first hierarchical modulation data is greater than or equal to the preset distance, the vehicle 5 does not forward the first hierarchical modulation data. Thereby ensuring that the first layered modulation data is received only to a certain extent by nodes requiring the first layered modulation data, preventing infinite propagation of the first layered modulation data.
In connection with the above description of the embodiments, the following describes related devices to which the present invention is applicable. Referring to fig. 8, fig. 8 is a schematic structural diagram of a data transmission device according to an embodiment of the present application, and as shown in fig. 8, the device 500 at least includes: a receiving unit 510, a transmitting unit 520 and a processing unit 530. Wherein the content of the first and second substances,
the processing unit 530 may be used to control and manage the actions of the data transmission device 500. For example, processing unit 530 is configured to perform step S104 in fig. 1 and/or is configured to perform other aspects of the techniques described in the method embodiments of the present application. The receiving unit 510 is configured to receive data sent by other devices, for example, the receiving unit 510 is configured to execute step S102 in fig. 1 and/or perform other contents of the technology described in this application; the transmitting unit 520 is configured to transmit data to other devices, for example, the transmitting unit 520 is configured to perform step S104 in fig. 1 and/or is configured to perform other contents of the technology described in this application.
Optionally, the data transmission apparatus 500 may further include a storage unit 540. The memory unit 540 is used for storing program codes and data of the data transmission device 500, for example, for decoding received layered modulation data. The processing unit 530 is configured to call the program code in the storage unit 540 to implement the implementation steps taking the data transmission apparatus as the execution subject in the embodiment described in fig. 1, and/or to execute other content steps of the technology described in this application.
The processing unit 530 may be a processor or a controller, and may be, for example, a Central Processing Unit (CPU), a general-purpose processor, a Digital Signal Processor (DSP), an application-specific integrated circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The receiving unit 510 and the transmitting unit 520 may be communication interfaces, transceivers, transceiving circuits, etc., wherein the communication interfaces are collectively referred to as "communication interfaces", and may include one or more interfaces, and the storage unit 640 may be a memory, or other service or module for providing a storage function.
Specifically, the specific implementation of the apparatus 500 to perform various operations may refer to the specific operations of the method embodiments, which are not described herein again.
Please refer to fig. 8, and fig. 8 is a schematic structural diagram of a network device according to an embodiment of the present application. The network device 600 comprises at least: a processor 610, a transceiver 620, and a memory 630, the processor 610, the transceiver 620, and the memory 630 being interconnected by a bus 640, wherein,
the processor 610 may be formed by one or more general-purpose processors, such as a Central Processing Unit (CPU), or a combination of a CPU and a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. The PLD may be a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), a General Array Logic (GAL), or any combination thereof.
Memory 630 may include volatile memory (volatile memory), such as Random Access Memory (RAM); the memory may also include a non-volatile memory (non-volatile memory), such as a read-only memory (ROM), a flash memory (flash memory), a Hard Disk Drive (HDD), or a solid-state drive (SSD); the memory 630 may also comprise a combination of memories of the kind described above. The memory 630 may be used to store program code and data to facilitate the processor 610 in invoking the program code stored in the memory 630 to implement the functionality of the communication module and/or processing module involved in embodiments of the present invention.
The processor 610 is configured to read the relevant instructions in the memory 630 to perform the following operations:
the method comprises the steps that a transceiver is controlled to receive first layered modulation data sent by a sending node, wherein the first layered modulation data comprise k layers of data, each layer of data in the first layered modulation data is independently coded and independently processed by power, and k is an integer greater than or equal to 2;
and under the condition that the predetermined i-layer data in the first layered modulation data is determined to be correctly decoded, controlling a transceiver to transmit second layered modulation data, wherein the second layered modulation data comprises the predetermined i-layer data which is correctly decoded, and i is a positive integer less than or equal to k.
Specifically, the specific implementation of the network device executing various operations may refer to the specific operations of the method embodiments, and details are not described herein.
In an embodiment, the apparatus shown in fig. 8 and 9 may be a terminal device, and the receiving unit 510 in fig. 7 and the transceiver in fig. 9 may be circuits or devices having radio frequency processing functions, which may be used to receive radio frequency signals and/or perform radio frequency related processing on the received radio frequency signals, for example, when step S102 in fig. 2 is executed, first layered modulation data in the form of radio frequency signals is received. The transmitting unit 520 in fig. 8 and the transceiver in fig. 9 may be circuits or devices having a radio frequency processing function, and may be configured to perform radio frequency processing on an input signal to generate a radio frequency processing and/or transmit a radio frequency signal, for example, when step S104 in fig. 2 is performed, second layered modulation data in the form of a radio frequency signal is transmitted.
In another embodiment, the apparatus shown in fig. 8 and 9 may be a chip or a system of chips, which may be mounted on a terminal device. In this embodiment, the receiving unit 510 in fig. 8 and the transceiver in fig. 9 may be an input signal interface of a chip or a system of chips, and are configured to receive a signal that needs to be processed in a baseband manner and is input from another device or circuit, for example, when step S102 in fig. 2 is executed, a signal obtained by performing radio frequency correlation processing on first layered modulation data in the form of a radio frequency signal is received. The transmitting unit 520 in fig. 8 and the transceiver in fig. 9 may be an output signal interface of a chip or a chip system, and are configured to perform baseband processing on data to be transmitted to obtain a baseband signal and/or output the baseband signal, for example, when step S104 in fig. 2 is executed, second layered modulation data in the form of a baseband signal is output.
Embodiments of the present invention further provide a computer non-transitory storage medium, where instructions are stored in the computer non-transitory storage medium, and when the instructions are run on a processor, the method steps in the foregoing method embodiments may be implemented, and specific implementation of the processor of the computer non-transitory storage medium in executing the method steps may refer to specific operations in the foregoing method embodiments, and details are not described here again.
In the above embodiments, all or part may be implemented by software, hardware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., SSD), among others.
The steps in the method of the embodiment of the application can be sequentially adjusted, combined or deleted according to actual needs; the modules in the device of the embodiment of the application can be divided, combined or deleted according to actual needs.
The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the above description of the embodiments is only provided to help understand the method and the core concept of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims (16)

1. A method of data transmission, comprising:
a receiving node receives first layered modulation data from a transmitting node based on a first receiving resource, wherein the first layered modulation data comprises k layers of data, each layer of data in the first layered modulation data is independently coded and independently processed with power, and k is an integer greater than or equal to 2;
under the condition that the predetermined i-layer data in the first hierarchical modulation data is correctly decoded and the distance between the receiving node and a source node is smaller than a preset distance, the receiving node sends second hierarchical modulation data based on a first sending resource, the source node is a node generating the first hierarchical modulation data, the second hierarchical modulation data comprises the predetermined i-layer data which is correctly decoded, wherein the first sending resource is the same as the first receiving resource, and i is a positive integer smaller than or equal to k.
2. The method of claim 1, wherein before the receiving node receives the first layered modulation data from the transmitting node, further comprising:
receiving first receiving resource information indicating a first receiving resource for receiving the first layered modulation data, wherein the first receiving resource information is carried in a pre-configuration signaling;
the receiving node receives first layered modulation data from a transmitting node, comprising:
the receiving node receives the first layered modulation data based on the first reception resource.
3. The method of claim 1, wherein before the receiving node receives the first layered modulation data from the transmitting node, further comprising:
a receiving node receives first dynamic control information, wherein the first dynamic control information comprises data layer number information of the first layered modulation data and a resource indication of a first receiving resource for receiving the first layered modulation data;
the receiving node receives first layered modulation data from a transmitting node, comprising:
the receiving node receives the first layered modulation data based on the first reception resource.
4. The method of claim 2 or 3, wherein the transmitting the second layered modulation data comprises:
and the receiving node transmits the second layered modulation data based on a first transmission resource, wherein the frequency domain resource corresponding to the first transmission resource is the same as the frequency domain resource corresponding to the first receiving resource, and the position of the time domain resource corresponding to the first transmission resource in the unit time resource is the same as the position of the time domain resource corresponding to the first receiving resource in the unit time resource.
5. The method of claim 3, wherein the method comprises:
the receiving node sends second dynamic control information based on second sending resources, wherein the content of the second dynamic control information is the same as that of the first dynamic control information, the frequency domain resources corresponding to the second sending resources are the same as the frequency domain resources occupied by the first dynamic control information, and the positions of the time domain resources corresponding to the second sending resources in the unit time resources are the same as the positions of the time domain resources occupied by the first dynamic control information in the unit time resources.
6. The method of claim 1, further comprising:
in an instance in which it is determined that the predetermined i-layer data in the first hierarchically modulated data has not been correctly decoded, a receiving node receives third hierarchically modulated data that includes the predetermined i-layer data in the first hierarchically modulated data.
7. The method according to claim 5 or 6, wherein the transmitting second hierarchical modulation data in case that it is determined that predetermined i-layer data in the first hierarchical modulation data is correctly decoded further comprises:
when the sending times of the second hierarchical modulation data are less than or equal to the preset forwarding times, the receiving node sends the second hierarchical modulation data; alternatively, the first and second electrodes may be,
when there are available transmission resources for transmitting the second layered modulation data, the receiving node transmits the second layered modulation data on the available transmission resources for transmitting the second layered modulation data.
8. A data transmission apparatus, characterized in that the apparatus comprises:
a receiving unit, configured to receive first layered modulation data from a sending node based on a first receiving resource, where the first layered modulation data includes k layers of data, each layer of data in the first layered modulation data is independently encoded and independently power-processed, and k is an integer greater than or equal to 2;
a processing unit, configured to determine whether predetermined i-layer data in the first hierarchical modulation data can be decoded correctly, where i is a positive integer less than or equal to k;
a sending unit, configured to send second hierarchical modulation data based on a first sending resource when the processing unit determines that predetermined i-layer data in the first hierarchical modulation data is correctly decoded and a distance between the receiving node and a source node is smaller than a preset distance, where the source node is a node that generates the first hierarchical modulation data, the first sending resource is the same as the first receiving resource, and the second hierarchical modulation data includes the predetermined i-layer data that is correctly decoded.
9. The apparatus of claim 8, wherein the receiving unit is further configured to:
receiving first receiving resource information before receiving first layered modulation data from a sending node, wherein the first receiving resource information indicates a first receiving resource for receiving the first layered modulation data, and is carried in pre-configuration signaling;
the receiving unit receives first layered modulation data from a transmitting node, and includes:
the receiving unit receives the first layered modulation data based on the first reception resource.
10. The apparatus of claim 8, wherein the receiving unit is further configured to:
before receiving first layered modulation data from a sending node, a receiving node receives first dynamic control information, wherein the first dynamic control information comprises data layer number information of the first layered modulation data and a resource indication of a first receiving resource for receiving the first layered modulation data;
the receiving unit receives first layered modulation data from a transmitting node, and includes:
the receiving unit receives the first layered modulation data based on the first reception resource.
11. The apparatus according to claim 9 or 10, wherein the sending unit is further configured to:
and transmitting the second hierarchical modulation data based on a first transmission resource, wherein a frequency domain resource corresponding to the first transmission resource is the same as a frequency domain resource corresponding to the first receiving resource, and a position of a time domain resource corresponding to the first transmission resource in a unit time resource is the same as a position of a time domain resource corresponding to the first receiving resource in the unit time resource.
12. The apparatus of claim 10, wherein the sending unit is further configured to:
and sending second dynamic control information based on second sending resources, wherein the content of the second dynamic control information is the same as that of the first dynamic control information, the frequency domain resources corresponding to the second sending resources are the same as the frequency domain resources occupied by the first dynamic control information, and the positions of the time domain resources corresponding to the second sending resources in the unit time resources are the same as the positions of the time domain resources occupied by the first dynamic control information in the unit time resources.
13. The apparatus of claim 8, wherein the receiving unit is further configured to:
receiving third layered modulation data in the event that it is determined that the predetermined i-layer data in the first layered modulation data was not correctly decoded, the third layered modulation data comprising the predetermined i-layer data in the first layered modulation data.
14. The apparatus according to any one of claims 12 or 13, wherein the sending unit is further configured to:
transmitting the second hierarchical modulation data under the condition that the preset i-layer data in the first hierarchical modulation data is correctly decoded and the transmission times of the second hierarchical modulation data are less than or equal to the preset forwarding times; alternatively, the first and second electrodes may be,
transmitting the second layered modulation data on the available transmission resources for transmitting the second layered modulation data, in case it is determined that predetermined i-layer data in the first layered modulation data is correctly decoded and there are available transmission resources for transmitting the second layered modulation data.
15. A user equipment comprising a processor, a transceiver, and a memory; the memory is configured to store instructions, the processor is configured to execute the instructions, and the transceiver is configured to receive and/or transmit data; wherein the processor, when executing the instructions, causes the user equipment to perform the method of any of claims 1 to 7.
16. A computer storage medium storing a computer program, wherein the computer program, when executed by a processor, causes an apparatus in which the processor is installed to implement the method of any one of claims 1 to 7.
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