CN109963264B - Data transmission method, communication equipment and network equipment - Google Patents
Data transmission method, communication equipment and network equipment Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
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- 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]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
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- 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
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Abstract
A data transmission method, a first communication device, a second communication device and a system relate to the fields of vehicle-to-vehicle communication technology, V2X, intelligent vehicles, automatic driving, intelligent networked vehicles and the like, wherein the data transmission method comprises the following steps: a first communication device sends first control information to a second communication device on a first sub-resource of first resources, where the first resource includes n sub-resources, n is a positive integer greater than or equal to 2, the first sub-resource is one of the n sub-resources, the first control information includes a first codebook set, and the first codebook set includes at least one codebook; the first communication device transmits first data to the second communication device on second resources according to the first codebook set. Therefore, the first communication device transmits the first data on the second data in a non-orthogonal access mode by adopting the first codebook set, and the second resource can also be used for other communication devices to transmit data, so that the utilization efficiency of the resource is improved.
Description
Technical Field
Embodiments of the present application relate to a communication system, and in particular, to a data transmission method, a communication device, and a network device.
Background
Device-to-Device (D2D) communication, Vehicle-to-Vehicle (V2V) communication, Vehicle-to-Pedestrian V2P (V2P) communication, or Vehicle-to-Infrastructure/Network V2I/N (V2I/N) communication is a technology for direct communication between terminal devices (terminal devices), V2V, V2P, and V2I/N are collectively referred to as V2X, i.e., the Vehicle communicates with anything.
Taking V2X communication as an example, the sender device will periodically send some information of its own, such as position, speed, intention information (e.g., information of turning, merging, backing, etc.), to the devices around the sender device to improve the safety of vehicle driving. The sending end equipment sends control information to the receiving end equipment on a first resource, the sending end equipment sends data to the receiving end equipment on a second resource according to the control information, the first resource and the second resource are in a frequency division multiplexing mode, the receiving end equipment receives and caches the control information and the data, then the receiving end equipment decodes the control information, and decodes the cached data according to the correctly decoded control information. In order to reduce interference, data of different terminal devices are orthogonally transmitted, and the second resource is only used for transmitting data of the sending end device, but cannot transmit data of other devices, so that the use efficiency of the resource is low.
Disclosure of Invention
Embodiments of the present application provide a data transmission method, a first communication device, a second communication device, and a network device, which can improve the utilization efficiency of resources.
In a first aspect, a method for transmitting data is provided, including: a first communication device sends first control information to a second communication device on a first sub-resource of first resources, where the first resource includes n sub-resources, n is a positive integer greater than or equal to 2, the first sub-resource is one of the n sub-resources, the first control information includes a first codebook set, and the first codebook set includes at least one codebook; the first communication device transmits first data to the second communication device on second resources according to the first codebook set.
According to the embodiment of the application, the first communication device sends the first control information to the second communication device on the first sub-resource of the first resource, the first control information includes the first codebook set, the first codebook set includes at least one codebook, the first communication device sends the first data to the second communication device on the second resource according to the first codebook set, the first communication device sends the first data on the second data in a non-orthogonal access mode by using the first codebook set, and the second resource can also be used for other communication devices to send data, so that the utilization efficiency of the resource is improved.
In one possible design, the first communication device receives first scheduling information from a network device, the first scheduling information indicating resources on which the first communication device transmits the first control information and the first set of codebooks by which the first communication device transmits the first data.
In one possible design, the first communication device selects the first sub-resource from the first resource, where the first sub-resource has a preset corresponding relationship with the first codebook set, and the first communication device obtains the first codebook set according to the first sub-resource and the preset corresponding relationship.
In one possible design, a second sub-resource of the first resource is used for a third communication device to send second control information to a fourth communication device, where the second sub-resource is one of n sub-resources included in the first resource, except for the first sub-resource, and the second control information includes a second codebook set, where the second codebook set includes at least one codebook; the second resource is further used for the third communication device to send second data to a fourth communication device on the second resource according to the second codebook set.
In one possible design, the first control information further includes first indication information, where the first indication information is used to indicate that the first resource and the second resource are in a frequency division multiplexing relationship or a time division multiplexing relationship; or the second control information further includes second indication information, where the second indication information is used to indicate that the first resource and the second resource are in a frequency division multiplexing relationship or a time division multiplexing relationship.
In one possible design, the first control information and the second control information are transmitted orthogonally, and the first data and the second data are transmitted non-orthogonally.
In a second aspect, there is provided a first communication device comprising: a sending unit, configured to send first control information to a second communication device on a first sub-resource of a first resource, where the first resource includes n sub-resources, n is a positive integer greater than or equal to 2, the first sub-resource is one of the n sub-resources, the first control information includes a first codebook set, and the first codebook set includes at least one codebook; the sending unit is further configured to send first data to the second communication device on a second resource according to the first codebook set.
According to the embodiment of the application, the first communication device sends the first control information to the second communication device on the first sub-resource of the first resource, the first control information includes the first codebook set, the first codebook set includes at least one codebook, the first communication device sends the first data to the second communication device on the second resource according to the first codebook set, the first communication device sends the first data on the second data in a non-orthogonal access mode by using the first codebook set, and the second resource can also be used for other communication devices to send data, so that the utilization efficiency of the resource is improved.
In one possible design, the first communication device further includes a receiving unit, where the receiving unit is configured to receive, from a network device, first scheduling information, where the first scheduling information is used to indicate a resource for the transmitting unit to transmit the first control information and the first codebook set used by the transmitting unit to transmit the first data.
In one possible design, the first communication device further includes a determining unit, and the determining unit is further configured to select the first sub-resource from the first resources, where the first sub-resource has a preset corresponding relationship with the first codebook set; the determining unit is further configured to obtain the first codebook set according to the first sub-resource and the preset corresponding relationship.
In one possible design, a second sub-resource of the first resource is used for a third communication device to send second control information to a fourth communication device, where the second sub-resource is one of n sub-resources included in the first resource, except for the first sub-resource, and the second control information includes a second codebook set, where the second codebook set includes at least one codebook; the second resource is further used for the third communication device to send second data to a fourth communication device on the second resource according to the second codebook set.
In one possible design, the first control information further includes first indication information, where the first indication information is used to indicate that the first resource and the second resource are in a frequency division multiplexing relationship or a time division multiplexing relationship; or the second control information further includes second indication information, where the second indication information is used to indicate that the first resource and the second resource are in a frequency division multiplexing relationship or a time division multiplexing relationship.
In one possible design, the first control information and the second control information are transmitted orthogonally, and the first data and the second data are transmitted non-orthogonally.
In a third aspect, a method for receiving data is provided, including: a second communication device receives first control information from a first communication device on a first sub-resource of first resources, where the first resource includes n sub-resources, n is a positive integer greater than or equal to 2, the first sub-resource is one of the n sub-resources, the first control information includes a first codebook set, and the first codebook set includes at least one codebook; the second communication device receives first data from the first communication device on second resources according to the first set of codebooks.
According to the embodiment of the application, the first communication device sends the first control information to the second communication device on the first sub-resource of the first resource, the first control information includes the first codebook set, the first codebook set includes at least one codebook, the first communication device sends the first data to the second communication device on the second resource according to the first codebook set, the first communication device sends the first data on the second data in a non-orthogonal access mode by using the first codebook set, and the second resource can also be used for other communication devices to send data, so that the utilization efficiency of the resource is improved.
In one possible design, a second sub-resource of the first resource is used for a third communication device to send second control information to a fourth communication device, where the second sub-resource is one of n sub-resources included in the first resource, except for the first sub-resource, and the second control information includes a second codebook set, where the second codebook set includes at least one codebook; the second resource is further used for the third communication device to send second data to a fourth communication device on the second resource according to the second codebook set.
In one possible design, the first control information further includes first indication information, where the first indication information is used to indicate that the first resource and the second resource are in a frequency division multiplexing relationship or a time division multiplexing relationship; or the second control information further includes second indication information, where the second indication information is used to indicate that the first resource and the second resource are in a frequency division multiplexing relationship or a time division multiplexing relationship.
In one possible design, the first control information and the second control information are transmitted orthogonally, and the first data and the second data are transmitted non-orthogonally.
In a fourth aspect, there is provided a second communication device comprising: a receiving unit, configured to receive first control information from a first communication device on a first sub-resource of a first resource, where the first resource includes n sub-resources, n is a positive integer greater than or equal to 2, the first sub-resource is one of the n sub-resources, the first control information includes a first codebook set, and the first codebook set includes at least one codebook; the receiving unit is further configured to receive first data from the first communication device on second resources according to the first codebook set.
According to the embodiment of the application, the first communication device sends the first control information to the second communication device on the first sub-resource of the first resource, the first control information includes the first codebook set, the first codebook set includes at least one codebook, the first communication device sends the first data to the second communication device on the second resource according to the first codebook set, the first communication device sends the first data on the second data in a non-orthogonal access mode by using the first codebook set, and the second resource can also be used for other communication devices to send data, so that the utilization efficiency of the resource is improved.
In one possible design, a second sub-resource of the first resource is used for a third communication device to send second control information to a fourth communication device, where the second sub-resource is one of n sub-resources included in the first resource, except for the first sub-resource, and the second control information includes a second codebook set, where the second codebook set includes at least one codebook; the second resource is further used for the third communication device to send second data to a fourth communication device on the second resource according to the second codebook set.
In one possible design, the first control information further includes first indication information, where the first indication information is used to indicate that the first resource and the second resource are in a frequency division multiplexing relationship or a time division multiplexing relationship; or the second control information further includes second indication information, where the second indication information is used to indicate that the first resource and the second resource are in a frequency division multiplexing relationship or a time division multiplexing relationship.
In one possible design, the first control information and the second control information are transmitted orthogonally, and the first data and the second data are transmitted non-orthogonally.
In a fifth aspect, a network device is provided, which includes: the network device sends first scheduling information to a first communication device, where the first scheduling information is used to indicate a resource used by the first communication device to send first control information and a first codebook set used by the first communication device to send the first data, the resource used by the first communication device to send the first control information is used by the first communication device to send the first control information, and the first codebook set is used by the first control information to format the first codebook set on a second resource to send the first data.
In a sixth aspect, the present application provides a computer-readable storage medium, which stores instructions that, when executed on a computer, cause the computer to perform the method of the above aspects.
In a seventh aspect, the present application provides a computer program product, where the program product stores computer software instructions for the first communication device or the second communication device, and the computer software instructions include a program for executing the solution of the above aspect.
In an eighth aspect, the present invention provides a chip for performing the method according to the above aspect, and the chip may include a portion having functions of a memory, a processor, a transmitter, a receiver, and/or a transceiver, and the memory stores instructions, codes, and/or data for performing the method according to the above aspect.
In a ninth aspect, the present application provides a system, where the system includes the first communication device, the second communication device, and/or the network device of the foregoing aspects.
Drawings
FIG. 1 is a schematic architecture diagram of a system according to an embodiment of the present application.
Fig. 2 is a data transmission method, a first communication device, a second communication device, a network device and a system according to an embodiment of the present application.
Fig. 3 is a data transmission method, a first communication device, a second communication device and a system according to an embodiment of the present application.
Fig. 4 is a schematic diagram of a data transmission resource according to an embodiment of the present application.
Fig. 5 is a schematic diagram of a data transmission resource according to an embodiment of the present application.
Fig. 6 is a schematic diagram of a data transmission resource according to an embodiment of the present application.
Fig. 7 is a schematic diagram of a NOMA according to an embodiment of the present application.
Fig. 8 is a first communication device according to an embodiment of the present application.
Fig. 9 is a second communication device according to an embodiment of the present application.
Fig. 10 is a network device according to an embodiment of the present application.
Detailed Description
In fig. 1, a first communication device sends control information to a second communication device, where the control information may be Sidelink Assignment information (SA), and the control information is used to indicate information such as time-frequency resources, modulation and coding formats, and packet sizes of data sent by the first communication device to the second communication device, and the second communication device receives the control information and decodes the received data according to the control information. The resource for the first communication device to transmit the control information and the resource for transmitting the data to the second communication device may be configured by the network device, or may be autonomously selected by the first communication device in the V2X resource pool.
The network device to which the present application relates is an apparatus deployed in a radio access network to provide a wireless communication function for a first or second communication device. The network device may be various forms of network devices or Base Stations (BSs), such as a macro Base Station, a micro Base Station, a relay Station or an access point, and so on. In systems using different radio access technologies, names of devices having network device functions may be different, for example, they are network devices or base stations in a fifth generation 5G network, referred to as evolved node B (eNB or eNodeB) in a Long Term Evolution (LTE) network, referred to as node B (node B) in a third generation 3G network, or referred to as Road Side Unit (RSU) in V2X communication, or chips or Systems On Chips (SOC) inside the network devices or base stations. For convenience of description, the above-mentioned apparatuses for providing a wireless communication function for a first or second communication device are collectively referred to as a network device in this application.
The first or second communication device referred to in this application may include various devices with wireless communication functions, such as an in-vehicle device, a wearable device, a computing device or other processing device connected to a wireless modem, a Mobile Station (MS), a terminal (terminal), and a User Equipment (UE), or a chip or SOC in such a device. For convenience of description, in the present application, the above-mentioned devices are collectively referred to as a first or second communication device.
The following describes embodiments of the present application in more detail by taking a first communication device, a second communication device, and a network device as examples, with reference to specific examples.
Fig. 2 and fig. 3 illustrate a data transmission method, a first communication device, a second communication device, a network device, and a system according to an embodiment of the present application. As shown in fig. 8, the first communication device includes a transmitting unit 81, a determining unit 82, and a receiving unit 83, wherein the transmitting unit 81 and the receiving unit 83 may be replaced by a transceiving unit. As shown in fig. 9, the second communication device includes a receiving unit 91, a determining unit 92, and a transmitting unit 93, wherein the receiving unit 91 and the transmitting unit 93 may be replaced by a transceiving unit. As shown in fig. 10, the network device includes a transmitting unit 101, a determining unit 102, and a receiving unit 103, and the transmitting unit 101 and the receiving unit 103 may be replaced by a transceiving unit.
When the first or second communication device is a terminal device or a user equipment, when the network device is a base station, the determining unit 82, the determining unit 92, or the determining unit 102 may be a processor, the transmitting unit 81, the transmitting unit 93, the transmitting unit 101, the receiving unit 83, the receiving unit 91, the receiving unit 103, or the transmitting and receiving unit may be a transceiver, the transmitting unit 81, the transmitting unit 93, or the transmitting unit 101 may be a transmitter, the receiving unit 83, the receiving unit 91, or the receiving unit 103 may be a receiver, the transceiver, the transmitter, or the receiver may be a radio frequency circuit, when the first or second communication device or the network device includes a storage unit, the storage unit is configured to store computer instructions, the processor is communicatively coupled to the memory, and the processor executes the computer instructions stored in the memory to enable the first communication device, the second communication device, or the network device to perform the method according to the embodiment in fig. 2 or fig. 3. The processor may be a general purpose Central Processing Unit (CPU), a microprocessor, or an Application Specific Integrated Circuit (ASIC).
When the first communication device, the second communication device, or the network device is a chip, the determining unit 82, the determining unit 92, or the determining unit 102 may be a processor, the transmitting unit 81, the transmitting unit 93, or the transmitting unit 101 may be an output interface, a pin, a circuit, or the like, the receiving unit 83, the receiving unit 91, or the receiving unit 103 may be an input interface, a pin, a circuit, or the like, and the transceiving unit may be an input/output interface, a pin, a circuit, or the like, for example. The processing unit may execute computer-executable instructions stored by the storage unit to cause a chip within the first communication device or the second communication device to perform the method referred to in fig. 2 or fig. 3. Optionally, the storage unit is a storage unit in the chip, such as a register, a cache, and the like, and the storage unit may also be a storage unit located outside the chip in the terminal, such as a Read Only Memory (ROM) or another type of static storage device that can store static information and instructions, a Random Access Memory (RAM), and the like.
In the embodiment of fig. 2, the communication Mode is a Mode 3(Mode 3) communication Mode of V2X communication, that is, resources for transmitting data and control information between communication devices are scheduled by a base station, and the specific steps of the data transmission method according to the embodiment of fig. 2 are as follows:
in step 21, the sending unit 101 of the network device sends the first scheduling information to the first communication device, and the receiving unit 83 of the first communication device receives the first scheduling information from the network device. The first scheduling information is used to indicate the resource of the first communication device for transmitting the first control information and the first codebook set used by the first communication device for transmitting the first data.
In step 22, the sending unit 81 of the first communication device sends the first control information to the second communication device on the first sub-resource of the first resource, and the receiving unit 91 of the second communication device receives the first control information from the first communication device on the first sub-resource of the first resource. The first resource includes n sub-resources, n is a positive integer greater than or equal to 2, the first sub-resource is one of the n sub-resources, the first control information includes a first codebook set, and the first codebook set includes at least one codebook.
In step 23, the sending unit 81 of the first communication device sends the first data to the second communication device on the second resource according to the first codebook set, and the receiving unit 91 of the second communication device receives the first data from the second communication device on the second resource according to the first codebook set.
The embodiment of fig. 3 is a Mode 4(Mode 4) communication Mode of V2X communication, that is, resources for transmitting data and control information between communication devices are autonomously selected by the communication devices, and the specific steps of the data transmission method according to the embodiment of fig. 3 are as follows:
step 31, the determining unit 82 of the first communication device selects the first sub-resource from the first resource, where the first sub-resource has a preset corresponding relationship with the first codebook set. The determining unit 82 of the first communication device obtains the first codebook set according to the first sub-resource and the preset corresponding relationship.
Optionally, before step 31, the communication method of mode 4 shown in fig. 3 may further include step 30, in which step 30, the determining unit 82 of the first communication device selects the first transmission resource in a first resource pool, where the first transmission resource includes a first resource and a second resource, the first resource is used for transmitting control information, and the second resource is suitable for transmitting data, where the first resource pool may be preset or configured by the network device; the first resource and the second resource may also be preset or may be configured by the network device. The first resource pool comprises at least one transmission resource, the first transmission resource being one of the at least one transmission resource comprised by the first resource pool, any one of the at least one transmission resource comprised by the first resource pool being selectable by the first communication device for V2X communication. For any resource in the first resource pool, some parameters corresponding to the resource are preset or configured, taking the first transmission resource as an example, the position relationship between the first resource for transmitting the control information and the second resource for transmitting the data in the first resource pool is a Frequency Division Multiplexing (FDM) relationship or a Time Division Multiplexing (FDM) relationship, the first resource includes n sub-resources, each sub-resource may be used for transmitting the control information by one communication device, and each sub-resource is preset or configured with a codebook set by the network device, that is, each sub-resource has a corresponding relationship with one codebook set. Therefore, the first communication device selects the first transmission resource in the first resource pool, and selects the first sub-resource in the first resource included in the first transmission resource for transmitting the first control information, and when the first communication device selects the first sub-resource, the first communication device may obtain the first codebook set corresponding to the first sub-resource, and also obtain that the positional relationship between the first resource and the second resource is FDM or TDM.
Optionally, the first transmission resource corresponds to a codebook set, and the first transmission resource may be preset or configured by the network device such that a codebook included in the codebook set corresponding to the first transmission resource is equally divided or preempted by the plurality of communication devices that transmit the control information using the first resource. For example, if the codebook is divided equally, the first resource includes 3 sub-resources respectively used for 3 communication devices to transmit control information, and the codebook used for transmitting data on the second resource is 9, each of the 3 communication devices will select 3 codebooks for transmitting its data. For example, if the codebook is preempted, different communication devices may preempt the codebook in the codebook set according to their own service requirements. Defining a load rate threshold of transmission resources, where the load rate threshold may be predefined or configured by a network device, and the load rate is a ratio of the number of codebooks that may be used by the current transmission resources and the total number of codebooks included in a codebook set corresponding to the transmission resources, which are detected or pre-determined by a communication device, and if the load rate detected or pre-determined by a first communication device is lower than the load rate threshold, the first communication device may preempt more codebooks for transmission of data thereof. Optionally, the communication device may be instructed to equally divide or preempt the codebook included in the codebook set by using 1-bit instruction information, where the instruction information may be sent to the first communication device by the network device, and certainly, the instruction information may also be that the codebook included in the codebook set corresponding to a certain resource is preset to equally divide or preempt. By setting the load rate threshold, the flexibility of resource allocation can be improved.
In step 32, the sending unit 81 of the first communication device sends the first control information to the second communication device on the first sub-resource of the first resource, and the receiving unit 91 of the second communication device receives the first control information from the first communication device on the first sub-resource of the first resource. The first resource includes n sub-resources, n is a positive integer greater than or equal to 2, the first sub-resource is one of the n sub-resources, the first control information includes a first codebook set, and the first codebook set includes at least one codebook.
In step 33, the sending unit 81 of the first communication device sends the first data to the second communication device on the second resource according to the first codebook set, and the receiving unit 91 of the second communication device receives the first data from the second communication device on the second resource according to the first codebook set.
In the embodiment of fig. 2 or fig. 3, a second sub-resource of a first resource is used for a third communication device to send second control information to a fourth communication device, where the second sub-resource is one of n sub-resources included in the first resource, except for the first sub-resource, the second control information includes a second codebook set, and the second codebook set includes at least one codebook; the second resource is further used for the third communication device to send second data to a fourth communication device on the second resource according to the second codebook set. Alternatively, in the embodiment of fig. 2 or 3, step 21 and step 31 are not necessary.
The first control information further includes first indication information, where the first indication information is used to indicate that the first resource and the second resource are in a frequency division multiplexing relationship or a time division multiplexing relationship. The second control information further includes second indication information, where the second indication information is used to indicate that the first resource and the second resource are in a frequency division multiplexing relationship or a time division multiplexing relationship.
The first Resource and the second Resource constitute a transmission Resource for transmitting V2X control information and data, and the transmission Resource may be a sub-channel, and the sub-channel includes at least one Resource Block (RB) in a frequency domain and includes one subframe, one slot, one micro-slot or at least one symbol in a time domain. The sub-channel may be a unit for transmitting V2X information, and both the number of RBs included in the frequency domain and the length in the time domain may be predefined by the protocol or configured by the network device.
Optionally, in the embodiment of fig. 2, the network device may send a mask to the first communication device to indicate the number of codebooks used by the first communication device, and the first communication device may also send a mask to the second communication device to indicate the number of codebooks used by the first communication device. For example, the first resource contains three sub-resources for three communication devices to transmit control information, while the second resource employs NOMA data transmission having six codebooks in total, if the mask is 110000, 001100 and 000011, 2 codebooks will be employed for the three communication devices to transmit data, respectively, and if the mask is 100000, 010100 and 000011, 1 codebook, 3 codebooks and 2 codebooks will be employed for the three communication devices to transmit data, respectively.
Fig. 4 is an example of FDM relationship between the first resource and the second resource in the embodiments of fig. 2 and fig. 3, where the FDM relationship includes m sub-channels, m is a positive integer, each sub-channel can be used for V2X communication, in sub-channel 0 of fig. 4, the first resource is divided into six sub-resources in the frequency domain, the six sub-resources occupy the same time domain resource, and preferably, the six sub-resources have the same time-frequency resource size, each sub-resource can be used for a communication device to transmit control information, the control information can be Sidelink Assignment (SA) information, then communication device 1 transmits SA1 on sub-resource 1, SA1 includes codebook set 1, communication device 2 transmits SA2 on sub-resource 2, SA2 includes codebook set 2, communication device 3 transmits SA3 on sub-resource 3, SA3 includes codebook set 3, communication device 4 transmits SA4 on sub-resource 4, SA4 may include codebook set 4, communication device 5 may transmit SA5 on sub-resource 5, SA5 may include codebook set 5, communication device 6 may transmit SA6 on sub-resource 6, SA6 may include codebook set 6, and SA1 to SA6 are orthogonal transmissions. The communication device 1 may transmit data 1 on the second resource according to the codebook set 1, the communication device 2 may transmit data 2 on the second resource according to the codebook set 2, the communication device 3 may transmit data 3 on the second resource according to the codebook set 3, the communication device 4 may transmit data 4 on the second resource according to the codebook set 4, the communication device 5 may transmit data 5 on the second resource according to the codebook set 5, the communication device 6 may transmit data 6 on the second resource according to the codebook set 6, where the data 1 to the data 6 are Non-Orthogonal transmissions, that is, Non-Orthogonal Multiple Access (NOMA) is adopted when the plurality of communication devices transmit data.
Fig. 5 is an example of the TDM relationship between the first resource and the second resource in the embodiments of fig. 2 and fig. 3, where the TDM relationship includes m sub-channels, m is a positive integer, each sub-channel is available for V2X communication, in sub-channel 0 of fig. 5, the first resource is divided into six sub-resources, each sub-resource is available for one communication device to transmit control information, the control information may be SA information, communication device 1 transmits SA1 on sub-resource 1, SA1 includes codebook set 1, communication device 2 transmits SA2 on sub-resource 2, SA2 includes codebook set 2, communication device 3 transmits SA3 on sub-resource 3, SA3 includes codebook set 3, communication device 4 transmits SA4 on sub-resource 4, SA4 includes codebook set 4, communication device 5 transmits SA5 on sub-resource 5, SA5 includes codebook set 5, communication device 6 transmits SA6, SA6 includes codebook set 6 on sub-resource 6, SA 1-SA 6 are orthogonal transmissions. The communication device 1 may transmit data 1 on the second resource according to the codebook set 1, the communication device 2 may transmit data 2 on the second resource according to the codebook set 2, the communication device 3 may transmit data 3 on the second resource according to the codebook set 3, the communication device 4 may transmit data 4 on the second resource according to the codebook set 4, the communication device 5 may transmit data 5 on the second resource according to the codebook set 5, the communication device 6 may transmit data 6 on the second resource according to the codebook set 6, where the data 1 to the data 6 are Non-Orthogonal transmissions, that is, Non-Orthogonal Multiple Access (NOMA) is adopted when the plurality of communication devices transmit data.
For V2X communication system, V2X transmission resource may be divided into several sub-channels in frequency domain, different sub-channels may be used for V2X communication fig. 4 and fig. 5 are the case where m sub-channels in the whole V2X resource bandwidth are both TDM or FDM, in fact, the form of different sub-channels adopting TDM or FDM may be predefined by protocol or flexibly configured by network equipment, for example, 1 bit of indication information may be sent by network equipment to a first communication equipment to indicate TDM or FDM, multiple sub-channels in V2X resource bandwidth may adopt one form of TDM or FDM, as shown in fig. 6, sub-channel 0 is FDM, and sub-channel m is TDM.
In the embodiments of fig. 2 to 6, a non-orthogonal Multiple Access NOMA mode is adopted to transmit data, that is, Multiple communication devices use the same time frequency Resource to transmit data, and the NOMA technology may specifically include Sparse Code Multiple Access (SCMA), Multiple User Shared Access (MUSA), Interleave Division Multiple Access (IDMA), Interleave Grid Multiple Access (IGMA), or Resource expansion Multiple Access (RSMA). In the NOMA technology, a plurality of codebooks may be predefined by a protocol or configured by a network device, the codebooks may also be signatures, different communication devices may be configured or autonomously select one or more codebooks of the plurality of codebooks as a codebook set for transmitting data by the communication device, as shown in fig. 7, there are six codebooks, respectively codebook 1 to codebook 6, and the second Resource includes four Resource Elements (REs), respectively RE1 to RE4, the existing communication device 1 and communication device 2 will transmit respective data on the second Resource in a NOMA manner, if data is transmitted on the second Resource according to codebook 1, in fig. 7, data transmitted according to codebook 1 will be mapped onto RE2 and RE4, and the RE to which data is mapped according to codebook 2 to codebook 6 is specifically shown in fig. 7, which will not be described again. If the codebook set 1 corresponding to the sub-resource 1 of the transmission control information selected by the communication device 1 or configured by the base station includes codebook 1 and codebook 2, and the codebook set 2 corresponding to the sub-resource 2 of the transmission control information selected by the communication device 2 or configured by the base station includes codebooks 3 to 6, the communication device 1 will transmit data 1 on the second resource according to codebooks 1 and codebooks 2, data 1 will be mapped to REs 1 to REs 4 according to codebooks 1 and codebooks 2, the communication device 2 will transmit data 2 on the second resource according to codebooks 3 to codebooks 6, data 2 will be mapped to REs 1 to REs 4 according to codebooks 3 to codebooks 6, that is, both the communication device 1 and the communication device 2 will transmit data on REs 1 to REs 4 included in the second resource. The communication device 1 may transmit control information 1 to the communication device 3 on the sub-resource 1, where the control information 1 may include the codebook set 1 and is transmitted to the communication device 3, the communication device 3 may decode data received on the second resource according to the codebook set 1 to obtain data 1, the communication device 2 may transmit control information 2 to the communication device 4 on the sub-resource 2, and the control information 2 may include the codebook set 2 and is transmitted to the communication device 4, and the communication device 4 may decode data received on the second resource according to the codebook set 2 to obtain data 2, so that the data 1 and the data 2 are transmitted in a non-orthogonal manner on the second resource, thereby improving the use efficiency of the resource. Preferably, the communication device 3 or the communication device 4 buffers the data on the second resource, that is, the communication device 3 and the communication device 4 receive the same data on the second resource, the communication device 3 decodes the data received on the second resource according to the codebook set 1 to obtain the data 1, and the communication device 4 decodes the data received on the second resource according to the codebook set 2 to obtain the data 2.
According to the embodiment of the application, the first communication device sends the first control information to the second communication device on the first sub-resource of the first resource, the first control information includes the first codebook set, the first codebook set includes at least one codebook, the first communication device sends the first data to the second communication device on the second resource according to the first codebook set, the first communication device sends the first data on the second data in a non-orthogonal access mode by using the first codebook set, and the second resource can also be used for other communication devices to send data, so that the utilization efficiency of the resource is improved.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implementing, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Claims (16)
1. A method for transmitting data, comprising:
a first communication device sends first control information to a second communication device on a first sub-resource of first resources, where the first resource includes n sub-resources, n is a positive integer greater than or equal to 2, the first sub-resource is one of the n sub-resources, the first control information includes a first codebook set, and the first codebook set includes at least one codebook;
the first communication device sending first data to the second communication device on second resources according to the first codebook set;
a second sub-resource of the first resource is used for a third communication device to send second control information to a fourth communication device, where the second sub-resource is one of n sub-resources included in the first resource, except for the first sub-resource, the second control information includes a second codebook set, and the second codebook set includes at least one codebook;
the second resource is further used for the third communication device to send second data to a fourth communication device on the second resource according to the second codebook set.
2. The method of claim 1, further comprising:
the first communication device receives first scheduling information from a network device, wherein the first scheduling information is used for indicating the resource of the first communication device for transmitting the first control information and the first codebook set used by the first communication device for transmitting the first data.
3. The method of claim 1, further comprising:
the first communication device selects the first sub-resource from the first resources, the first sub-resource has a preset corresponding relationship with the first codebook set, and the first communication device obtains the first codebook set according to the first sub-resource and the preset corresponding relationship.
4. The method according to any one of claims 1 to 3,
the first control information further includes first indication information, where the first indication information is used to indicate that the first resource and the second resource are in a frequency division multiplexing relationship or a time division multiplexing relationship; or
The second control information further includes second indication information, where the second indication information is used to indicate that the first resource and the second resource are in a frequency division multiplexing relationship or a time division multiplexing relationship.
5. The method according to any one of claims 1 to 3,
the first control information and the second control information are orthogonal transmission, and the first data and the second data are non-orthogonal transmission.
6. A first communications device, comprising:
a sending unit, configured to send first control information to a second communication device on a first sub-resource of a first resource, where the first resource includes n sub-resources, n is a positive integer greater than or equal to 2, the first sub-resource is one of the n sub-resources, the first control information includes a first codebook set, and the first codebook set includes at least one codebook;
the sending unit is further configured to send first data to the second communication device on a second resource according to the first codebook set;
a second sub-resource of the first resource is used for a third communication device to send second control information to a fourth communication device, where the second sub-resource is one of n sub-resources included in the first resource, except for the first sub-resource, the second control information includes a second codebook set, and the second codebook set includes at least one codebook;
the second resource is further used for the third communication device to send second data to a fourth communication device on the second resource according to the second codebook set.
7. The first communication device of claim 6, further comprising a receiving unit,
the receiving unit is configured to receive first scheduling information from a network device, where the first scheduling information is used to indicate a resource used by the sending unit to send the first control information and the first codebook set used by the sending unit to send the first data.
8. The first communication device of claim 6, further comprising a determination unit,
the determining unit is further configured to select the first sub-resource from the first resource, where the first sub-resource and the first codebook set have a preset corresponding relationship;
the determining unit is further configured to obtain the first codebook set according to the first sub-resource and the preset corresponding relationship.
9. The first communication device of any of claims 6-8,
the first control information further includes first indication information, where the first indication information is used to indicate that the first resource and the second resource are in a frequency division multiplexing relationship or a time division multiplexing relationship; or
The second control information further includes second indication information, where the second indication information is used to indicate that the first resource and the second resource are in a frequency division multiplexing relationship or a time division multiplexing relationship.
10. The first communication device of any of claims 6-8,
the first control information and the second control information are orthogonal transmission, and the first data and the second data are non-orthogonal transmission.
11. A method for receiving data, comprising:
a second communication device receives first control information from a first communication device on a first sub-resource of first resources, where the first resource includes n sub-resources, n is a positive integer greater than or equal to 2, the first sub-resource is one of the n sub-resources, the first control information includes a first codebook set, and the first codebook set includes at least one codebook;
the second communication device receiving first data from the first communication device on second resources according to the first set of codebooks;
a second sub-resource of the first resource is used for a third communication device to send second control information to a fourth communication device, where the second sub-resource is one of n sub-resources included in the first resource, except for the first sub-resource, the second control information includes a second codebook set, and the second codebook set includes at least one codebook;
the second resource is further used for the third communication device to send second data to a fourth communication device on the second resource according to the second codebook set.
12. The method of claim 11,
the first control information further includes first indication information, where the first indication information is used to indicate that the first resource and the second resource are in a frequency division multiplexing relationship or a time division multiplexing relationship; or
The second control information further includes second indication information, where the second indication information is used to indicate that the first resource and the second resource are in a frequency division multiplexing relationship or a time division multiplexing relationship.
13. The method according to claim 11 or 12,
the first control information and the second control information are orthogonal transmission, and the first data and the second data are non-orthogonal transmission.
14. A second communications device, comprising:
a receiving unit, configured to receive first control information from a first communication device on a first sub-resource of a first resource, where the first resource includes n sub-resources, n is a positive integer greater than or equal to 2, the first sub-resource is one of the n sub-resources, the first control information includes a first codebook set, and the first codebook set includes at least one codebook;
the receiving unit is further configured to receive first data from the first communication device on a second resource according to the first codebook set;
a second sub-resource of the first resource is used for a third communication device to send second control information to a fourth communication device, where the second sub-resource is one of n sub-resources included in the first resource, except for the first sub-resource, the second control information includes a second codebook set, and the second codebook set includes at least one codebook;
the second resource is further used for the third communication device to send second data to a fourth communication device on the second resource according to the second codebook set.
15. The second communication device of claim 14,
the first control information further includes first indication information, where the first indication information is used to indicate that the first resource and the second resource are in a frequency division multiplexing relationship or a time division multiplexing relationship; or
The second control information further includes second indication information, where the second indication information is used to indicate that the first resource and the second resource are in a frequency division multiplexing relationship or a time division multiplexing relationship.
16. The second communication device of claim 14 or 15,
the first control information and the second control information are orthogonal transmission, and the first data and the second data are non-orthogonal transmission.
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| PCT/CN2018/117332 WO2019120041A1 (en) | 2017-12-23 | 2018-11-24 | Data transmission method, communication device and network device |
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| CN107431902B (en) * | 2015-02-06 | 2021-02-19 | 三星电子株式会社 | Method and apparatus for transmitting and receiving signal in communication system supporting device-to-device scheme |
| US20170006586A1 (en) * | 2015-07-02 | 2017-01-05 | Qualcomm Incorporated | Techniques for managing a resource pool in wireless communications |
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