CN111865847B

CN111865847B - Data transmission method and device

Info

Publication number: CN111865847B
Application number: CN201910364496.3A
Authority: CN
Inventors: 龚政委
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2021-11-30
Anticipated expiration: 2039-04-30
Also published as: CN111865847A

Abstract

The application provides a data transmission method and a data transmission device, relates to the technical field of data transmission, and can solve the problem of unbalanced modulation and demodulation performance of bit groups subjected to two modulation modes. The method comprises the following steps: in a first sending opportunity, the data sending equipment adopts a first modulation mode to determine a first modulation symbol; determining a first target sending resource unit by adopting a second modulation mode; transmitting a first modulation symbol by adopting a first target transmission resource unit; determining a second modulation symbol by adopting a first modulation mode at a second sending opportunity; determining a second target sending resource unit by adopting a second modulation mode; and transmitting the second modulation symbol by adopting the second target transmission resource unit. The method is applied to the data transmission process.

Description

Data transmission method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a data transmission method and apparatus.

Background

Generally, in an index modulation (index modulation) transmission technique, a transmitting side modulates a first bit group in a bit set to be transmitted by using a first modulation scheme, determines a corresponding modulation symbol, and modulates a second bit group in the bit set to be transmitted based on a second modulation scheme, specifically, the second modulation scheme is to select one or more resource units in one resource unit set and transmit the modulation symbol corresponding to the first bit group by using the one or more resource units selected by the second modulation scheme, where the resource units may be antenna units, frequency domain units, and time domain units. Taking antenna unit selection as an example, on the transmitting side, a first bit group is modulated by Quadrature Amplitude Modulation (QAM) to generate a modulation symbol, and a second bit group selects a transmitting antenna based on a Space Shift Keying (SSK) modulation method, where different bit combinations included in the second bit group correspond to different antenna numbers. In this manner, the modulation symbols generated by the first bit group are transmitted through the selected antenna. At a receiving side, determining the number of a transmitting antenna according to a received signal, and demodulating a second bit group; and then, according to the determined channel information (such as channel response or channel gain) corresponding to the transmitting antenna, equalizing the received signal and demodulating a first bit group.

Generally, for the first modulation scheme, the demodulation performance mainly depends on the channel response or channel gain corresponding to the resource unit transmitting the modulation symbol, and for the second modulation scheme, the demodulation performance mainly depends on the correlation between the channels corresponding to different resource units. Therefore, in the index value modulation transmission technology, there is a problem that the modulation and demodulation performance is unbalanced in the bit groups using different modulation schemes.

Disclosure of Invention

The embodiment of the application provides a data transmission method and device, which can solve the problem of unbalanced modulation and demodulation performance of bit groups subjected to two modulation modes.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in a first aspect, the present application provides a data transmission method, which may be performed by a data transmission device. The data transmission device may be a terminal device, or may be a component (such as a system on a chip) in the terminal device. The method comprises the following steps: in a first sending opportunity, the data sending equipment modulates a first bit group in a bit set to be modulated by adopting a first modulation mode to determine a first modulation symbol; modulating a second bit group in the bit set to be modulated by adopting a second modulation mode to determine a first target sending resource unit; transmitting a first modulation symbol by adopting a first target transmission resource unit; in a second sending opportunity, the data sending equipment modulates a third bit group in the bit set to be modulated by adopting a first modulation mode to determine a second modulation symbol; modulating a fourth bit group in the bit set to be modulated by adopting a second modulation mode to determine a second target sending resource unit; transmitting a second modulation symbol by adopting a second target transmission resource unit; the third group of bits includes at least one bit from the second group of bits and the fourth group of bits includes at least one bit from the first group of bits.

In the data transmission method provided by the application, data sending equipment modulates a first bit group in a to-be-modulated bit set by adopting a first modulation mode at a first sending opportunity so as to determine a first modulation symbol; modulating a second bit group in the bit set to be modulated by adopting a second modulation mode to determine a first target sending resource unit; transmitting a first modulation symbol by adopting a first target transmission resource unit; modulating a third bit group in the bit set to be modulated by adopting a first modulation mode at a second sending opportunity so as to determine a second modulation symbol; modulating a fourth bit group in the bit set to be modulated by adopting a second modulation mode to determine a second target sending resource unit; and transmitting the second modulation symbol by adopting the second target transmission resource unit. Wherein the third group of bits comprises at least one bit of the second group of bits and the fourth group of bits comprises at least one bit of the first group of bits. Compared with the prior art, when data transmission is performed based on the multi-transmission resource unit, each bit group is transmitted only through any one of the two modulation modes, so that the problem that the modulation and demodulation performance of the bit groups transmitted through the two modulation modes is unbalanced exists. According to the data transmission method provided by the embodiment of the application, the bits in the bit set to be modulated are transmitted by adopting two modulation modes, rather than being transmitted by only any one of the two modulation modes, so that the problem of unbalanced demodulation performance of two bit groups can be avoided.

In a second aspect, the present application provides a data receiving method, which may be performed by a data receiving apparatus. The data receiving device may be a terminal device, or may be a component (e.g., a system on a chip) in the terminal device. The method comprises the following steps: on a first receiving opportunity, the data receiving equipment determines an index number corresponding to a first target sending resource unit based on a second modulation mode; demodulating a second bit group based on the index number corresponding to the first target sending resource unit; determining a first modulation symbol based on the first target sending resource unit and the first modulation mode; demodulating a first bit group based on the first modulation symbol; at a second receiving opportunity, the data receiving equipment determines an index number corresponding to a second target sending resource unit based on a second modulation mode; demodulating a fourth bit group based on the index number corresponding to the second target sending resource unit; determining a second modulation symbol based on the second target transmission resource unit and the first modulation mode; demodulating a third bit group based on the second modulation symbol; the third group of bits includes at least one bit in the second group of bits, the fourth group of bits includes at least one bit in the first group of bits, and the first group of bits, the second group of bits, the third group of bits, and the fourth group of bits are all used to determine a set of demodulated bits.

In a possible design of the first aspect or the second aspect, when the modulation order of the first modulation scheme is the same as the modulation order of the second modulation scheme, the third bit group is the second bit group, and the fourth bit group is the first bit group.

In this way, each bit in the two bit groups can be transmitted to the data receiving device by two different modulation methods. Compared with the prior art, each bit group is subjected to a modulation mode, so that the modulation and demodulation performances of the two bit groups are unbalanced. Since each bit is subjected to two different modulation modes, the problem of unbalanced demodulation performance can be avoided.

In a possible design of the first aspect or the second aspect, when the modulation order of the first modulation scheme is greater than the modulation order of the second modulation scheme, the third bit group is formed by at least one bit in the first bit group and the second bit group, and the fourth bit group is formed by bits other than the at least one bit in the first bit group.

In this way, for the bits in the two bit groups, the maximum number of bits in the two bit groups can be subjected to two different modulation modes and transmitted to the data receiving device. Because the maximum number of bits in the two bit groups can be in two different modulation modes, the influence caused by imbalance of demodulation performance can be reduced to a certain extent.

In a possible design of the first aspect or the second aspect, when the first modulation order of the first modulation scheme is smaller than the second modulation order of the second modulation scheme, the fourth bit group is formed by at least one bit in the second bit group and the first bit group, and the third bit group is formed by bits other than the at least one bit in the second bit group.

In this way, for the bits in the two bit groups, the maximum number of bits in the two bit groups can be subjected to two different modulation modes and transmitted to the data receiving device. Further, the influence of imbalance of demodulation performance can be reduced to a certain extent.

In a third aspect, the present application provides a data transmission method, which may be performed by a first device. The first device may be a terminal device, or may be a component (e.g., a system-on-chip) in the terminal device. The method comprises the following steps: the method comprises the steps that a first device measures a channel gain set corresponding to a sending resource unit set used for transmitting data; respectively acquiring a first Channel Quality Indicator (CQI) corresponding to a first modulation mode and a second CQI corresponding to a second modulation mode according to a plurality of channel gains; transmitting the first CQI and the second CQI to the second device; the first modulation mode is used for determining a first modulation symbol, the second modulation mode is used for determining a first transmission resource unit used for transmitting the first modulation symbol in a transmission resource unit set, the transmission resource unit set comprises a plurality of transmission resource units, the channel gain set comprises a plurality of channel gains, and one channel gain in the channel gain set corresponds to one transmission resource unit in the transmission resource unit set.

In the data transmission method provided by the application, a first device measures a channel gain set corresponding to a sending resource unit set used for transmitting data, respectively obtains a first Channel Quality Indicator (CQI) corresponding to a first modulation mode and a second CQI corresponding to a second modulation mode according to a plurality of channel gains, and sends the first CQI and the second CQI to a second device. The first modulation mode is used for determining a first modulation symbol, the second modulation mode is used for determining a first transmission resource unit used for transmitting the first modulation symbol in a transmission resource unit set, the transmission resource unit set comprises a plurality of transmission resource units, the channel gain set comprises a plurality of channel gains, and one channel gain in the channel gain set corresponds to one transmission resource unit in the transmission resource unit set. In contrast to the prior art, when determining a Channel Quality Indicator (CQI), common measurement and feedback are generally performed, that is, an average value of signal-to-noise ratios corresponding to a plurality of transmission resource units, for example, P, is calculated_s(|h₀|²+|h₁|²+…+|h_R-1|²)/(Rσ²) The CQI is determined in this way, and the MCS corresponding to the CQI is determined. In the above calculation manner, since the CQI is determined based on the average of the snr corresponding to a plurality of transmission resource units, the modem performance of each bit group is not explicitly shown. And, the same CQI based on common measurement and feedback is used to determine that two modulation schemes are respectively pairedDue to the MCS, the same CQI may be applicable to one modulation scheme but not the other modulation scheme, which results in the problem of unbalanced modulation and demodulation performance of two bit groups. The data transmission method provided by the embodiment of the application independently performs measurement and feedback of the CQI, that is, based on the measured channel gain, a first CQI and a second CQI corresponding to two modulation schemes are respectively determined and fed back to the second device, so that the second device can determine a first MCS corresponding to the first modulation scheme based on the first CQI and determine a second MCS corresponding to the second modulation scheme based on the second CQI, so that demodulation performance of bit groups modulated by the two modulation schemes is balanced.

In one possible design, obtaining a first CQI corresponding to a first modulation scheme and a second CQI corresponding to a second modulation scheme according to a plurality of channel gains respectively includes: the first CQI is determined by an absolute value of at least one channel gain in a set of channel gains; the second CQI is determined by a difference between at least two channel gains in the set of channel gains.

Here, the first CQI is determined by an absolute value of at least one channel gain in the set of channel gains. The second CQI is determined by a difference between at least two channel gains in the set of channel gains. Compared with the prior art, by P_s(|h₀|²+|h₁|²+…+|h_R-1|²)/(Rσ²) This formula determines the CQI and, in turn, the Modulation and Coding Scheme (MCS). Since the first CQI and the second CQI are separately and independently determined, the first CQI is determined based on an absolute value of at least one channel gain, and may represent a state (for example, signal quality of a spatial channel) presented by the spatial channel when a signal modulated by the first modulation scheme is transmitted, and further select a modulation scheme and a coding rate more suitable for channel transmission based on the state of the spatial channel to transmit data. Similarly, a second CQI is determined based on a difference between at least two channel gains, and the second CQI may represent a state of a spatial channel when a signal modulated by a second modulation scheme is transmitted, and further may be based on the spatial channelThe state of the channel selects a modulation mode and a coding rate more suitable for channel transmission to send data, so that the influence of various factors on a received signal in the transmission process is reduced. Furthermore, because the first CQI and the second CQI are separately and independently determined, and the modulation scheme and the coding rate are respectively determined based on the independent first CQI and the independent second CQI, it is possible to avoid a problem that when different modulation schemes and coding rates are determined based on one CQI, the CQI is only applicable to one modulation scheme and one coding rate but not to the other modulation scheme and the other coding rate, which causes imbalance in demodulation performance of the two modulation schemes.

In one possible design, the data transmission method provided by the present application further includes: receiving a first modulation and coding measurement MCS corresponding to the first modulation mode and a second MCS corresponding to the second modulation mode; demodulating and decoding the received signal according to the first MCS to obtain a first group of data bits; and demodulating and decoding the received signal according to the second MCS to obtain a second group of data bits.

In one possible design, the data transmission method provided by the present application further includes: receiving a first modulation and coding measurement MCS corresponding to the first modulation mode and a second MCS corresponding to the second modulation mode; coding and modulating the first group of data according to the first MCS to obtain a first modulation symbol; encoding and modulating the second set of data according to the second MCS to select a first transmission resource unit for transmitting the first modulation symbol; and transmitting the first modulation symbol by adopting the first transmission resource unit.

In a fourth aspect, the present application provides a data transmission apparatus, which may be the data transmission device in the first aspect. The apparatus includes a processing unit and a transmitting unit. The processing unit is used for modulating a first bit group in a to-be-modulated bit set by adopting a first modulation mode at a first sending opportunity so as to determine a first modulation symbol; modulating a second bit group in the bit set to be modulated by adopting a second modulation mode to determine a first target sending resource unit; the modulation method is further used for modulating a third bit group in the to-be-modulated bit set by adopting the first modulation mode on a second sending opportunity so as to determine a second modulation symbol; modulating a fourth bit group in the bit set to be modulated by adopting a second modulation mode to determine a second target sending resource unit; the third group of bits includes at least one bit from the second group of bits and the fourth group of bits includes at least one bit from the first group of bits. A sending unit, configured to send a first modulation symbol by using a first target sending resource unit at a first sending opportunity; and transmitting the second modulation symbol by adopting a second target transmission resource unit at a second transmission opportunity.

In a fifth aspect, the present application provides a data receiving apparatus, which may be the data receiving device in the second aspect. The apparatus includes a processing unit. A processing unit, configured to determine, at a first receiving occasion, an index number corresponding to a first target sending resource unit based on a second modulation scheme; demodulating a second bit group based on the index number corresponding to the first target sending resource unit; determining a first modulation symbol based on the first target sending resource unit and the first modulation mode; demodulating a first bit group based on the first modulation symbol; the first modulation mode is used for determining an index number corresponding to a first target sending resource unit on the basis of a first receiving opportunity; demodulating a fourth bit group based on the index number corresponding to the second target sending resource unit; determining a second modulation symbol based on the second target transmission resource unit and the first modulation mode; demodulating a third bit group based on the second modulation symbol; the third group of bits includes at least one bit in the second group of bits, the fourth group of bits includes at least one bit in the first group of bits, and the first group of bits, the second group of bits, the third group of bits, and the fourth group of bits are all used to determine a set of demodulated bits.

In a possible design of the fourth aspect or the fifth aspect, when the modulation order of the first modulation scheme is the same as the modulation order of the second modulation scheme, the third bit group is the second bit group, and the fourth bit group is the first bit group.

In a possible design of the fourth aspect or the fifth aspect, when the modulation order of the first modulation scheme is greater than the modulation order of the second modulation scheme, the third bit group is formed by at least one bit in the first bit group and the second bit group, and the fourth bit group is formed by bits other than the at least one bit in the first bit group.

In a possible design of the fourth aspect or the fifth aspect, when the first modulation order of the first modulation scheme is smaller than the second modulation order of the second modulation scheme, the fourth bit group is formed by at least one bit in the second bit group and the first bit group, and the third bit group is formed by bits other than the at least one bit in the second bit group.

In a sixth aspect, the present application provides a data transmission apparatus, which may be the first device in the third aspect. The device comprises a processing unit, a sending unit and a receiving unit. A processing unit, configured to measure a channel gain set corresponding to a transmission resource unit set used for transmitting data, where the transmission resource unit set includes multiple transmission resource units, the channel gain set includes multiple channel gains, and one channel gain in the channel gain set corresponds to one transmission resource unit in the transmission resource unit set; the device is further used for respectively acquiring a first channel quality indicator CQI corresponding to the first modulation mode and a second CQI corresponding to the second modulation mode according to the plurality of channel gains; a transmitting unit, configured to transmit the first CQI and the second CQI to the second device; the first modulation scheme is used for determining a first modulation symbol, and the second modulation scheme is used for determining a first transmission resource unit used for transmitting the first modulation symbol in the transmission resource unit set.

In a possible design, the processing unit is configured to obtain a first CQI corresponding to a first modulation scheme and a second CQI corresponding to a second modulation scheme according to a plurality of channel gains, and specifically includes: determining a first CQI from an absolute value of at least one channel gain in a set of channel gains; the second CQI is determined from a difference between at least two channel gains in the set of channel gains.

In one possible design, the receiving unit is configured to receive a first modulation and coding measurement MCS corresponding to a first modulation scheme and a second MCS corresponding to a second modulation scheme; a processing unit, configured to demodulate and decode the received signal according to the first MCS to obtain a first group of data bits; and demodulating and decoding the received signal according to the second MCS to obtain a second group of data bits.

In one possible design, the receiving unit is configured to receive a first modulation and coding measurement MCS corresponding to a first modulation scheme and a second MCS corresponding to a second modulation scheme; the processing unit is further used for coding and modulating the first group of data according to the first MCS to obtain a first modulation symbol; encoding and modulating the second set of data according to the second MCS to select a first transmission resource unit for transmitting the first modulation symbol; and the sending unit is further used for sending the first modulation symbol by adopting the first sending resource unit.

In a seventh aspect, the present application provides a data transmission apparatus, configured to implement a function of a data sending device in the above first aspect, or to implement a function of a data receiving device in the above second aspect, or to implement a function of a first device in the above third aspect.

In an eighth aspect, an embodiment of the present application provides a data transmission apparatus having a function of implementing the data transmission method according to any one of the first aspect and the fourth aspect, or having a function of implementing the data reception method according to any one of the second aspect and the fifth aspect, or having a function of implementing the data transmission method according to any one of the third aspect and the sixth aspect. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In a ninth aspect, there is provided a data transmission apparatus comprising: a processor and a memory; the memory is configured to store computer-executable instructions, and when the data transmission apparatus is operated, the processor executes the computer-executable instructions stored by the memory to cause the data transmission apparatus to perform the data transmission method according to any one of the first and fourth aspects, or to perform the data reception method according to any one of the second and fifth aspects, or to perform the data transmission method according to any one of the third and sixth aspects.

A tenth aspect provides a data transmission apparatus comprising: a processor; the processor is configured to be coupled to the memory, and after reading the instruction in the memory, execute the data transmission method according to any one of the first aspect and the fourth aspect, or execute the data reception method according to any one of the second aspect and the fifth aspect, or execute the data transmission method according to any one of the third aspect and the sixth aspect.

In an eleventh aspect, there is provided a computer-readable storage medium having instructions stored therein, which when run on a computer, cause the computer to perform the data transmission method according to any one of the first and fourth aspects described above, or perform the data reception method according to any one of the second and fifth aspects described above, or perform the data transmission method according to any one of the third and sixth aspects described above.

In a twelfth aspect, there is provided a computer program product containing instructions which, when run on a computer, enable the computer to perform the data transmission method according to any one of the first and fourth aspects, or the data reception method according to any one of the second and fifth aspects, or the data transmission method according to any one of the third and sixth aspects.

In a thirteenth aspect, there is provided circuitry comprising processing circuitry configured to perform the data transmission method of any one of the first and fourth aspects described above, or to perform the data reception method of any one of the second and fifth aspects described above, or to perform the data transmission method of any one of the third and sixth aspects described above.

A fourteenth aspect provides a chip comprising a processor, a memory coupled to the processor, the memory storing program instructions that, when executed by the processor, implement the data transmission method according to any one of the first and fourth aspects, or implement the data reception method according to any one of the second and fifth aspects, or implement the data transmission method according to any one of the third and sixth aspects.

In a fifteenth aspect, a communication system is provided, where the communication system includes the data transmitting apparatus in any of the above aspects and the data receiving apparatus in any of the above aspects, or the communication system includes the first apparatus and the second apparatus in any of the above aspects.

For technical effects brought by any one of the design manners in the second aspect to the fifteenth aspect, reference may be made to technical effects brought by different design manners in the first aspect, and details are not described herein.

Drawings

Fig. 1 is a schematic diagram of a data transmission system according to an embodiment of the present application;

fig. 2 is a flowchart of a data transmission method according to an embodiment of the present application;

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

fig. 4 is a flowchart of a data transmission method according to an embodiment of the present application;

fig. 5 is a flowchart of a data transmission method according to an embodiment of the present application;

fig. 6 is a flowchart of a data transmission method according to an embodiment of the present application;

fig. 7 is a flowchart of a data transmission method according to an embodiment of the present application;

fig. 8 is a flowchart of a data transmission method according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a data transmission device according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a data transmission device according to an embodiment of the present application.

Detailed Description

The terms "first" and "second" and the like in the description and drawings of the present application are used for distinguishing different objects or for distinguishing different processes for the same object, and are not used for describing a specific order of the objects. Furthermore, the terms "including" and "having," and any variations thereof, as referred to in the description of the present application, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

First, technical terms related to embodiments of the present application are introduced:

time domain symbol: in the Orthogonal Frequency Division Multiplexing (OFDM) technique, for one Resource Block (RB), there are 12 subcarriers in succession in frequency and one slot (slot) in time domain. One Resource Element (RE) is formed of 1 subcarrier in frequency and one time domain symbol (symbol) in time domain. Each subcarrier spacing is 15 kHz. In the case of a normal cyclic prefix (normal cyclic prefix), a slot has 7 time domain symbols. In the case of an extended cyclic prefix (extended cyclic prefix), one slot has 6 time domain symbols.

The above is only an example that the subcarrier interval is 15kHz and one time slot includes 7 time domain symbols, and as technology evolves, parameters such as the number of time domain symbols included in each subcarrier interval and each time slot may change, which is not limited in the embodiment of the present application.

In general, a time domain unit may be a time domain symbol or a time slot, a frequency domain unit may be a subcarrier, and a space domain unit may be an antenna port.

The data transmission method in the embodiment of the present application may be applied to a data transmission system shown in fig. 1, where the data transmission system includes an access network device 10 and a terminal 20, the access network device 10 may communicate with the terminal 20, and one access network device 10 may provide services for a large number of terminals 20.

The access network device 10 is a device deployed in a radio access network to provide a wireless communication function. Optionally, the access network device 10 according to the embodiment of the present application includes, for example and without limitation, macro base stations, micro base stations (also referred to as small stations), relay stations, Transmission Reception Points (TRPs), next generation network nodes (g Node bs, gnbs), evolved Node bs (ng-enbs) connected to a next generation core network, and the like in various forms, and may further include a wireless access network device of a non-3 GPP system, such as a Wireless Local Area Network (WLAN) access device.

The terminal 20 is mainly used for receiving or transmitting data. Alternatively, the terminal 20 referred to in the embodiments of the present application may include, for example but not limited to, various handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem with wireless communication capability; a subscriber unit (subscriber unit), a cellular phone (cellular phone), a smart phone (smart phone), a wireless data card, a Personal Digital Assistant (PDA) computer, a tablet computer, a handheld device (hand), a laptop computer (laptop computer), a Machine Type Communication (MTC) terminal (terminal), a User Equipment (UE), and the like may also be included.

It is emphasized that the present data transmission system may comprise a plurality of access network devices, only one of which is shown in fig. 1 by way of example.

The communication system may be applied to a current Long Term Evolution (LTE) or LTE-Advanced (LTE-a) system, and may also be applied to a currently established 5G network or other future networks, which is not specifically limited in this embodiment of the present invention. Wherein the access network device 10 and the terminal 20 in the above communication system may correspond to different names in different networks, and those skilled in the art will understand that the names do not limit the device itself.

The system architecture and the service scenario described in this application are for more clearly illustrating the technical solution of this application, and do not constitute a limitation to the technical solution provided in this application, and it can be known by those skilled in the art that the technical solution provided in this application is also applicable to similar technical problems along with the evolution of the system architecture and the appearance of new service scenarios.

An embodiment of the present application provides a data transmission method, as shown in fig. 2, the method includes:

s201, in a first sending opportunity, the data sending device modulates a first bit group in the to-be-modulated bit set by using a first modulation method to determine a first modulation symbol. And modulating a second bit group in the bit set to be modulated by adopting a second modulation mode to determine a first target sending resource unit. And transmitting the first modulation symbol by adopting the first target transmission resource unit. Wherein, the first bit group can also be defined as a first path of bit stream; the second bit group may also be defined as a second bit stream.

The transmission timing may be a time domain resource, a frequency domain resource, or other possible resources. The transmission resource unit may be an antenna port, a time domain symbol, or a frequency domain subcarrier.

The first modulation scheme is used to determine a modulation symbol, and may specifically be Quadrature Amplitude Modulation (QAM), Pulse Amplitude Modulation (PAM), or Quadrature Phase Shift Keying (QPSK). Alternatively, the first modulation scheme may be another possible modulation scheme for determining the modulation symbol, and the embodiment of the present application does not limit the specific type of the first modulation scheme.

The second modulation scheme is used for determining a target transmission resource unit for transmitting a modulation symbol in the transmission resource unit set, and may specifically be Spatial Shift Keying (SSK) or Frequency Shift Keying (FSK). Alternatively, the second modulation scheme may be another modulation scheme for selecting the target transmission resource unit. S202, in a second sending opportunity, the data sending device modulates a third bit group in the to-be-modulated bit set by using the first modulation method to determine a second modulation symbol. And modulating a fourth bit group in the bit set to be modulated by adopting a second modulation mode to determine a second target sending resource unit. And transmitting the second modulation symbol by adopting the second target transmission resource unit.

Wherein the third group of bits comprises at least one bit of the second group of bits and the fourth group of bits comprises at least one bit of the first group of bits.

For example, the transmission opportunity may be a time domain resource, and the transmission resource unit may be an antenna port. Here, the time slots are taken as the division granularity of the time domain resource, that is, alternate modulation is performed between different time slots. Referring to fig. 3, the first modulation scheme employs QAM, and the second modulation scheme employs SSK. The bit set to be modulated is composed of b0, b1, b2 and b3, the first bit group is composed of b0 and b1, and the second bit group is composed of b2 and b 3. At this time, modulating the set of bits to be modulated may specifically be implemented as: in the first time slot, the data transmission apparatus modulates b0 and b1 with QAM to determine a first modulation symbol; b2 and b3 are modulated with SSK to determine a first target antenna port. In one possible implementation, the first target antenna port is determined according to the mapping relationship between the two bits b2 and b3 and the antenna ports, for example, 00 is mapped to antenna port No. 1, 01 is mapped to antenna port No. 2, 10 is mapped to antenna port No. 3, and so on. A first modulation symbol (the modulation symbols generated by b0 and b 1) is transmitted with a first target antenna port. Here, the first modulation symbol (generated by b0 and b 1) is shown transmitted, and b2 and b3 are implicitly indicated, that is, b2 and b3 are indicated by the mapping relationship between the first target antenna port and b2 and b 3.

In the second time slot, the data transmission apparatus modulates b2 and b3 with QAM to determine a second modulation symbol; modulating b0 and b1 with SSK to determine a second target antenna port; the second modulation symbol (modulation symbol generated by b2 and b 3) is transmitted using the second target antenna port (antenna port selected by b0 and b 1). That is, in the first time slot, the first modulation symbol is transmitted, and the transmission resource unit transmitting the first modulation symbol is the spatial resource, i.e. the first target antenna port, and in the second time slot, the second modulation symbol is transmitted, and the spatial resource transmitting the second modulation symbol is the second target antenna port. It can be seen that, in the embodiment of the present application, at different sending occasions, for one or more bits in the same bit set to be modulated, different modulation modes may be used to modulate the one or more bits, and the one or more bits are transmitted to the data receiving device. Here, modulating the same bit with different modulation schemes at different transmission timings may be referred to as rotating modulation.

Illustratively, the transmission occasions may be frequency domain resources. At this time, taking the antenna port as the transmission resource unit as an example, performing rotation modulation on the to-be-modulated bit set may specifically be implemented as: on a first carrier frequency band, the data transmission equipment modulates b0 and b1 by adopting QAM to determine a first modulation symbol; modulating b2 and b3 with SSK to determine a first target antenna port; the first modulation symbol is transmitted using the first target antenna port. On the second carrier frequency band, the data transmission equipment modulates b2 and b3 by adopting QAM to determine a second modulation symbol; modulating b0 and b1 with SSK to determine a second target antenna port; and transmitting the second modulation symbol by using the second target antenna port.

Illustratively, the transmission resource elements may be time domain symbols. Here, the time domain symbols are taken as the division granularity of the time domain resource, that is, alternate modulation is performed between different time domain symbols. The alternate modulation of the bit set to be modulated can be specifically realized as follows: at a first sending opportunity, the data sending equipment modulates b0 and b1 by adopting a first modulation mode to determine a first modulation symbol; and b2 and b3 are modulated by a second modulation mode to determine a first time domain symbol. In one possible implementation, the first time domain symbol is determined according to the mapping relationship between the two bits b2 and b3 and the time domain symbol, for example, 00 is mapped to the first time domain symbol of a slot, 01 is mapped to the second time domain symbol, 10 is mapped to the third time domain symbol, and so on. A first modulation symbol is transmitted using a first time domain symbol, such as an OFDM symbol. At a second transmission opportunity, the data transmission equipment modulates b2 and b3 by adopting a first modulation mode to determine a second modulation symbol; modulating b0 and b1 by adopting a second modulation mode to determine a second time domain symbol; and transmitting the second modulation symbol by using the second time domain symbol.

It should be noted that the first transmission timing and the second transmission timing may be the same or different. In one example, the first transmission opportunity and the second transmission opportunity are both slot 1, and in slot 1, the data transmission apparatus modulates b0 and b1 by using a first modulation mode to determine a first modulation symbol; b2 and b3 are modulated using a second modulation scheme, and a first modulation symbol (i.e., the modulation symbols generated by b0, b 1) is determined to be transmitted on the first to three time domain symbols of slot 1. In a time slot 1, the data transmission device modulates b2 and b3 by adopting a first modulation mode to determine a second modulation symbol; b0 and b1 are modulated using a second modulation scheme, and a second modulation symbol (generated by b2, b 3) is determined to be transmitted on the fourth to six time domain symbols of slot 1.

The transmission resource units may also be frequency domain subcarriers. The alternate modulation of the bit set to be modulated can be specifically realized as follows: at a first sending opportunity, the data sending equipment modulates b0 and b1 by adopting a first modulation mode to determine a first modulation symbol; b2 and b3 are modulated by a second modulation mode to determine first frequency domain subcarriers; the first modulation symbol is transmitted using a first frequency domain subcarrier. At a second transmission opportunity, the data transmission equipment modulates b2 and b3 by adopting a first modulation mode to determine a second modulation symbol; b0 and b1 are modulated by a second modulation mode to determine second frequency domain subcarriers; and transmitting the second modulation symbol by using the second frequency domain subcarrier.

It should be noted that, when dividing a bit set to be modulated into bit groups, the number of bits included in each bit group needs to be determined according to modulation orders of two modulation methods. For example, when the first bit group and the third bit group are modulated by the first modulation method, the number of bits included in the first bit group and the third bit group is determined by the modulation order of the first modulation method, and the number of bits included in the second bit group and the fourth bit group is determined by the modulation order of the second modulation method.

In an embodiment of the application, the third group of bits comprises at least one bit of the second group of bits and the fourth group of bits comprises at least one bit of the first group of bits. Because the bits in the second bit group are modulated by the second modulation mode, the bits in the third bit group are modulated by the first modulation mode. In this way, at least one bit in the set of bits to be modulated can undergo two different modulation schemes. Compared with the prior art, each bit group is subjected to one modulation mode, and the demodulation performance of the two modulation modes depends on different factors, so that the modulation and demodulation performance of the two bit groups is unbalanced. Since at least one bit in the bit set to be modulated can be subjected to two different modulation modes, the influence caused by imbalance of demodulation performance can be reduced to a certain extent.

Optionally, when the modulation order of the first modulation scheme is the same as the modulation order of the second modulation scheme, in order to enable more bits in the bit set to be modulated to undergo two different modulation schemes, the third bit group is the second bit group, and the fourth bit group is the first bit group. In this way, the bits in the second group of bits can each undergo two different modulation schemes.

Exemplarily, referring to table 1, the modulation orders of the first modulation scheme and the second modulation scheme are the same and are four. Two bits for each symbol. The first bit group is composed of b₀₀And b₀₁Formed, denoted as B0. The second bit group is composed of b₁₀And b₁₁Formed, denoted as B1. Since the modulation orders of the first modulation scheme and the second modulation scheme are the same, in order to transmit more bits to the data receiving apparatus via two different modulation schemes, the first bit group B0 modulated by using the first modulation scheme at transmission timing 1 is used as the bit group modulated by using the second modulation scheme at transmission timing 2. The second bit group B1 modulated by the second modulation method at transmission timing 1 is used as the first bit group B1 modulated by the first modulation method at transmission timing 2And modulating the bit groups by a modulation mode.

TABLE 1

At this time, the rotation modulation may be specifically implemented as: at a transmission opportunity 1, the data transmission equipment modulates a first bit group B0 by using a first modulation mode to determine a first modulation symbol; modulating the second bit group B1 by adopting a second modulation mode to determine a first target sending resource unit; and transmitting the first modulation symbol by adopting the first target transmission resource unit. At transmission opportunity 2, the data transmission device modulates the second bit group B1 by using the first modulation mode to determine a second modulation symbol; modulating the first bit group B0 by adopting a second modulation mode to determine a second target sending resource unit; and transmitting the second modulation symbol by adopting the second target transmission resource unit.

Optionally, when the modulation order of the first modulation scheme is greater than the modulation order of the second modulation scheme, in order to enable more bits in the bit set to be modulated to undergo two different modulation schemes, the third bit group is formed by at least one bit in the first bit group and the second bit group, and the fourth bit group is formed by bits other than the at least one bit in the first bit group.

Illustratively, referring to table 2, the modulation order of the first modulation scheme is eight, and each symbol of the first modulation scheme corresponds to three bits. The modulation order of the second modulation scheme is four, and each symbol of the second modulation scheme corresponds to two bits. The first bit group is composed of b₀₀、b₀₁And b₀₂The structure is denoted as B0. First, theTwo bit groups consisting of b₁₀And b₁₁Formed, denoted as B1. In order to transmit more bits to the data receiving device via two different modulation schemes, two bits, e.g. B, are randomly extracted from a first group of bits B0 modulated at transmission opportunity 1 using a first modulation scheme₀₀And b₀₁The first subset is formed as bits modulated at transmission timing 2 using the second modulation scheme. A second bit group B1 modulated by the second modulation method at the transmission opportunity 1 and the rest bits (such as B) in the first bit group B0₀₂) The second subset is formed as bits modulated using the first modulation scheme at transmission timing 2.

TABLE 2

At this time, the rotation modulation may be specifically implemented as: at a transmission opportunity 1, the data transmission equipment modulates a first bit group B0 by using a first modulation mode to determine a first modulation symbol; modulating the second bit group B1 by adopting a second modulation mode to determine a first target sending resource unit; and transmitting the first modulation symbol by adopting the first target transmission resource unit. At transmission opportunity 2, the data transmission apparatus applies the first modulation scheme to the second bit group B1 and the second subset [ B ] of the first bit group B0₀₂]Modulating to determine a second modulation symbol; applying a second modulation mode to a first subset [ B ] of the first bit group B0₀₀,b₀₁]Modulating to determine a second target transmission resource unit; and transmitting the second modulation symbol by adopting the second target transmission resource unit.

Optionally, when the modulation order of the first modulation scheme is smaller than the modulation order of the second modulation scheme, the third bit group includes at least one bit in the second bit group, and the fourth bit group includes at least one bit in the first bit group. And in order to make more bits in the bit set to be modulated undergo two different modulation modes, the fourth bit group is formed by at least one bit in the second bit group and the first bit group, and the third bit group is formed by bits except for at least one bit in the second bit group.

Illustratively, referring to table 3, the modulation order of the first modulation scheme is four, and each symbol of the first modulation scheme corresponds to two bits. The modulation order of the second modulation scheme is eight, and each symbol of the second modulation scheme corresponds to three bits. The first bit group is composed of b₀₀And b₀₁The structure is denoted as B0. The second bit group is composed of b₁₀、b₁₁And b₁₂The structure is denoted as B1. In order to transmit more bits to the data receiving device via two different modulation schemes, two bits, e.g. B, are randomly extracted from a second group of bits B1 modulated at transmission opportunity 1 using a second modulation scheme₁₀And b₁₁A first subset is formed as bits modulated at transmission timing 2 using the first modulation scheme. The first bit group B0 modulated by the first modulation mode at transmission opportunity 1 and the rest bits (such as B) in the second bit group B1₁₂) The second subset is formed as bits modulated by the second modulation scheme at transmission timing 2.

TABLE 3

At this time, the rotation modulation may be specifically implemented as: at a transmission opportunity 1, the data transmission equipment modulates a first bit group B0 by using a first modulation mode to determine a first modulation symbol; using a second modulationModulating the second bit group B1 in a manner to determine a first target transmission resource unit; and transmitting the first modulation symbol by adopting the first target transmission resource unit. At transmission opportunity 2, the data transmission apparatus applies the first modulation scheme to the first subset [ B ] of the second bit group B1₁₀,b₁₁]Modulating to determine a second modulation symbol; applying a second modulation scheme to a second subset [ B ] of the first bit group B0 and the second bit group B1₁₂]Modulating to determine a second target transmission resource unit; and transmitting the second modulation symbol by adopting the second target transmission resource unit.

The embodiment of the present application does not limit the execution sequence of S201 and S202.

The above describes a method for modulating the rotation mechanism by the data transmission device. As follows, a flow of reception and demodulation by the data reception apparatus based on the rotation mechanism will be explained.

S203, at the first receiving occasion, the data receiving apparatus determines an index number corresponding to the first target sending resource unit based on the second modulation scheme. And demodulating a second bit group based on the index number corresponding to the first target sending resource unit. And determining a first modulation symbol based on the first target transmission resource unit and the first modulation mode. A first group of bits is demodulated based on the first modulation symbol.

Optionally, the data receiving device is preconfigured with pilot signals corresponding to each antenna port. Illustratively, when the receiving opportunity is a time slot and the transmitting resource unit is an antenna port. And determining an index number corresponding to a first target antenna port for receiving the first modulation symbol based on the second modulation mode. Specifically, when performing demodulation using the second modulation scheme (e.g., SSK), correlation demodulation may be performed based on multiple pilot signals of multiple antenna ports, so that the data receiving apparatus knows which antenna port or antenna ports the first modulation symbol is received at, and determines index numbers of the antenna ports. For a detailed procedure of performing the related demodulation based on the pilot signal, reference may be made to the prior art, and details are not described herein.

Further, at the first receiving opportunity, the second bit group is demodulated based on the index number of the first target antenna port. That is, the second bit group is demodulated according to the mapping relationship between the index numbers and the bits of the antenna ports mentioned above.

Further, the data receiving device performs equalization processing on the received signal (i.e., the first modulation symbol) based on the channel response or the channel gain corresponding to the first target antenna port, performs correlation demodulation using a demodulation scheme corresponding to the first modulation scheme, and determines a first bit group corresponding to the first modulation symbol. For a detailed process of performing equalization processing on a received signal based on a channel response or a channel gain corresponding to the first target antenna port and performing related demodulation in a demodulation manner corresponding to the first modulation manner, reference may be made to the prior art, which is not described herein again.

And S204, at the second receiving opportunity, the data receiving equipment determines the index number corresponding to the second target sending resource unit based on the second modulation mode. And demodulating a fourth bit group based on the index number corresponding to the second target sending resource unit. And determining a second modulation symbol based on the second target transmission resource unit and the first modulation mode. A third group of bits is demodulated based on the second modulation symbol.

The third bit group comprises at least one bit in the second bit group, the fourth bit group comprises at least one bit in the first bit group, and the first bit group, the second bit group, the third bit group and the fourth bit group are all used for determining a demodulated bit set.

In the uplink, the data sending device may specifically be a terminal, and the data receiving device may specifically be a base station. In downlink, the data transmitting device may specifically be a base station, and the data receiving device may specifically be a terminal.

Optionally, the data receiving device is preconfigured with pilot signals corresponding to each antenna port. Illustratively, when the receiving opportunity is a time slot and the transmitting resource unit is an antenna port. And determining an index number corresponding to a second target antenna port for receiving a second modulation symbol based on the second modulation mode. Specifically, when performing demodulation using the second modulation scheme (e.g., SSK), correlation demodulation may be performed based on multiple pilot signals of multiple antenna ports, so that the data receiving apparatus knows which antenna port or antenna ports the second modulation symbol is received at, and determines index numbers of the antenna ports. For a detailed procedure of performing the related demodulation based on the pilot signal, reference may be made to the prior art, and details are not described herein.

Further, at a second receiving opportunity, a fourth bit group is demodulated based on the index number of the second target antenna port. That is, the fourth bit group is demodulated according to the mapping relationship between the index numbers and the bits of the antenna ports mentioned above.

Further, based on the first modulation scheme, the second modulation symbol received by the second target antenna port is demodulated by using a demodulation scheme corresponding to the first modulation scheme, so as to obtain a third bit group.

The reception timing corresponds to the transmission timing. If the transmission timing is a time domain resource, the reception timing is also a time domain resource. If the transmission timing is a frequency domain resource, the reception timing is also a frequency domain resource. The two modulation modes have different modulation orders, and the demodulated bit numbers are different. For example, the number of bits included in each of the first bit group and the third bit group is determined by the modulation order of the first modulation scheme, and the number of bits included in each of the second bit group and the fourth bit group is determined by the modulation order of the second modulation scheme. As the data sending equipment adopts the alternate modulation mode, the bits in the bit set to be modulated are subjected to two modulation modes as much as possible and sent to the data receiving equipment. Therefore, the bits demodulated by the data receiving device at the two receiving occasions are the same as the bits used by the data sending device at the two sending occasions.

Optionally, when the modulation order of the first modulation scheme is the same as the modulation order of the second modulation scheme, in order to enable more bits in the bit set to be modulated to undergo two different modulation schemes, the third bit group is the second bit group, and the fourth bit group is the first bit group. That is, the data transmission apparatus modulates the first bit group modulated by the first modulation scheme at transmission timing 1, the fourth bit group modulated by the second modulation scheme at transmission timing 2, the second bit group modulated by the second modulation scheme at transmission timing 1, and the third bit group modulated by the first modulation scheme at transmission timing 2, as shown in table 1. Correspondingly, the data receiving device demodulates the first bit group in the receiving time 1 in the first modulation mode, demodulates the second bit group in the receiving time 1 in the second modulation mode, obtains a fourth bit group demodulated in the second modulation mode in the receiving time 2 as the first bit group, and obtains a third bit group demodulated in the first modulation mode in the receiving time 2 as the second bit group, as shown in table 4 specifically.

TABLE 4

Thus, for two bit groups demodulated by the data receiving equipment, each bit in the two bit groups is subjected to two different modulation modes, and the problem of unbalanced demodulation performance can be avoided.

Optionally, when the modulation order of the first modulation scheme is greater than the modulation order of the second modulation scheme, the third bit group includes at least one bit in the second bit group, and the fourth bit group includes at least one bit in the first bit group. And in order to make more bits in the bit set to be modulated undergo two different modulation modes, the third bit group is formed by at least one bit in the first bit group and the second bit group, and the fourth bit group is formed by bits except at least one bit in the first bit group.

Illustratively, the data transmission device randomly extracts two bits, e.g., B, from a first group of bits B0 modulated using a first modulation scheme at transmission opportunity 1₀₀And b₀₁Forming a first subsetThe bits modulated with the second modulation scheme at transmission timing 2 are the second bit group B1 modulated with the second modulation scheme at transmission timing 1, and the remaining bits (e.g., B) in the first bit group B0₀₂) The second subset is configured as bits modulated by the first modulation scheme at transmission timing 2, as shown in table 2. Correspondingly, the data receiving device demodulates the first bit group in the first modulation mode at the receiving occasion 1, demodulates the second bit group in the second modulation mode at the receiving occasion 1, and demodulates the third bit group in the first modulation mode at the receiving occasion 2, wherein the third bit group demodulated by the first modulation mode includes the second bit group B1 and one bit B of the first bit group B0₀₂The fourth bit group demodulated by the second modulation mode includes the other two bits B of the first bit group B0₀₀And b₀₁Specifically, the results are shown in Table 5.

TABLE 5

Thus, for two bit groups demodulated by the data receiving device, the most number of bits in the two bit groups are subjected to two different modulation modes, so that the influence caused by imbalance of demodulation performance can be reduced to a certain extent.

Illustratively, the data transmission device randomly extracts two bits, e.g., B, from a second group of bits B1 for the second modulation scheme at transmission opportunity 1₁₀And b₁₁Forming a first subset as a first use on transmission occasion 2And the modulation mode is used for modulating bits. The first bit group B0 modulated by the first modulation mode at transmission opportunity 1 and the rest bits (such as B) in the second bit group B1₁₂) The second subset is configured as bits modulated by the second modulation scheme at transmission timing 2, as shown in table 3. Correspondingly, the data receiving device demodulates the first bit group in the first modulation mode at the receiving occasion 1, demodulates the second bit group in the second modulation mode at the receiving occasion 1, and demodulates the third bit group in the first modulation mode at the receiving occasion 2, wherein the third bit group includes one bit B1 of the second bit group B1₁₀And b₁₁The fourth bit group demodulated by the second modulation scheme includes one bit B of the first bit group B0 and the second bit group B1₁₂Specifically, the results are shown in Table 6.

TABLE 6

In the data transmission method provided by the embodiment of the application, data sending equipment modulates a first bit group in a to-be-modulated bit set by adopting a first modulation mode at a first sending opportunity so as to determine a first modulation symbol; modulating a second bit group in the bit set to be modulated by adopting a second modulation mode to determine a first target sending resource unit; transmitting a first modulation symbol by adopting a first target transmission resource unit; modulating a third bit group in the bit set to be modulated by adopting a first modulation mode at a second sending opportunity so as to determine a second modulation symbol; modulating a fourth bit group in the bit set to be modulated by adopting a second modulation mode to determine a second target sending resource unit; and transmitting the second modulation symbol by adopting the second target transmission resource unit. Wherein the third group of bits comprises at least one bit of the second group of bits and the fourth group of bits comprises at least one bit of the first group of bits. Accordingly, the data receiving apparatus performs rotation demodulation at different reception timings. Compared with the prior art, when data transmission is performed based on the multi-transmission resource unit, each bit group is transmitted only through any one of the two modulation modes, so that the problem that the modulation and demodulation performance of the bit groups transmitted through the two modulation modes is unbalanced exists. According to the data transmission method provided by the embodiment of the application, the bits in the bit set to be modulated are transmitted by adopting two modulation modes, rather than being transmitted by only any one of the two modulation modes, so that the problem of unbalanced demodulation performance of two bit groups can be avoided.

An embodiment of the present application further provides a data transmission method, as shown in fig. 4, the method includes:

s401, the first device measures a channel gain set corresponding to a sending resource unit set used for transmitting data.

The transmission resource unit set comprises a plurality of transmission resource units, the channel gain set comprises a plurality of channel gains, and one channel gain in the channel gain set corresponds to one transmission resource unit in the transmission resource unit set.

The transmission resource unit may be one or more of an antenna port, a time domain symbol, or a frequency domain subcarrier in combination.

Illustratively, the first device may be a terminal.

Illustratively, the antenna port is used as a transmission resource unit. The first device performs channel estimation based on the reference signal to obtain a channel gain corresponding to each antenna port, that is, a set of channel gains h ═ h₀，h₁，…h_x，…h_R-1]. Wherein x is [0, R-1 ]]R represents the total number of antenna ports in the transmitting resource unit set, h_xIndicating the channel gain corresponding to the xth antenna port.

S402, the first device respectively obtains a first Channel Quality Indicator (CQI) corresponding to the first modulation scheme and a second CQI corresponding to the second modulation scheme according to the plurality of channel gains.

The first modulation scheme is used for determining a first modulation symbol, and the second modulation scheme is used for determining a first transmission resource unit used for transmitting the first modulation symbol in the transmission resource unit set.

The first modulation scheme may specifically be Quadrature Amplitude Modulation (QAM), Pulse Amplitude Modulation (PAM), or Quadrature Phase Shift Keying (QPSK).

The second modulation scheme is used for determining a target transmission resource unit for transmitting a modulation symbol in the transmission resource unit set, and may specifically be Spatial Shift Keying (SSK) or Frequency Shift Keying (FSK).

The CQI determination methods corresponding to the two modulation methods are different. Specifically, the first CQI is determined by an absolute value of at least one channel gain in the set of channel gains. The second CQI is determined by a difference or correlation between at least two channel gains in the set of channel gains.

Illustratively, the first CQI is determined by equation (1):

CQI1＝P_s|h_x|²/σ² (1)

where CQI1 denotes the first CQI, P_sRepresents the signal transmission power, | h_xI represents the absolute value of the signal gain corresponding to the xth antenna port, x ═ 0, R-1]R represents the total number of antenna ports in the set of transmit resource units, σ²Representing the noise power.

Optionally, the absolute value of the largest channel gain is selected from the channel gain set as | h in the above equation_xAnd if the corresponding first CQI value is larger, the robustness of the channel is represented to be strongest, and the anti-interference capability is higher.

Determining a second CQI by equation (2):

CQI2＝P_s|h_i-h_j|²/σ² (2)

where CQI2 denotes a second CQI, P_sWhich is indicative of the power at which the signal is transmitted,|h_ii represents the signal gain corresponding to the ith antenna port, | h_jI represents the signal gain corresponding to the jth antenna port, i ═ 0, R-1]，j＝[0，R-1]And i ≠ j, R denotes the total number of antenna ports in the set of transmit resource units, σ²Representing the noise power.

Optionally, for the channel gain set, a difference between every two channel gains is calculated, a minimum channel gain difference is selected, and a smaller second CQI value determined according to the minimum channel gain difference indicates that the correlation between the two antenna ports is stronger and interference generated on signals transmitted and received by the two antenna ports is stronger.

Optionally, a difference between every two channel gains is calculated, a channel gain difference smaller than or equal to a gain difference threshold is selected, and a second CQI is determined based on the selected channel gain difference. In one example, if there is no channel gain difference less than or equal to the gain difference threshold, the smallest channel gain difference is selected. In one example, if the number of channel gain differences less than or equal to the gain difference threshold is greater than 1, one of the channel gain differences is randomly selected, and the second CQI is determined based on the selected channel gain difference.

Here, the first CQI is determined by an absolute value of at least one channel gain in the set of channel gains. The second CQI is determined by a difference between at least two channel gains in the set of channel gains. Compared with the prior art, by P_s(|h₀|²+|h₁|²+…+|h_R-1|²)/(Rσ²) This formula determines the CQI and, in turn, the Modulation and Coding Scheme (MCS). Since the first CQI and the second CQI are separately and independently determined by the data transmission method according to the embodiment of the present application, the first CQI is determined based on the absolute value of at least one channel gain, and the first CQI may represent a state (such as signal quality of a spatial channel) presented by the spatial channel when a signal modulated by the first modulation scheme is transmitted, and further select a modulation scheme and a coding rate more suitable for channel transmission based on the state of the spatial channel to transmit the numberAccordingly. Similarly, a second CQI is determined based on a difference between at least two channel gains, where the second CQI may represent a state of a spatial channel when a signal modulated by the second modulation scheme is transmitted, and then a modulation scheme and a coding rate more suitable for channel transmission are selected based on the state of the spatial channel to transmit data, so as to reduce an influence of various factors on a received signal during transmission. Furthermore, because the first CQI and the second CQI are separately and independently determined, and the modulation scheme and the coding rate are respectively determined based on the independent first CQI and the independent second CQI, it is possible to avoid a problem that when different modulation schemes and coding rates are determined based on one CQI, the CQI is only applicable to one modulation scheme and one coding rate but not to the other modulation scheme and the other coding rate, which causes imbalance in demodulation performance of the two modulation schemes.

S403, the first device sends the first CQI and the second CQI to the second device.

Accordingly, the second device receives the first CQI and the second CQI from the first device.

The first device may be a terminal, and the second device may be a base station.

The second equipment determines a Modulation and Coding Scheme (MCS) corresponding to the first CQI according to the received first CQI, and sends the first MCS to the first equipment; and determining a second MCS corresponding to the second CQI according to the received second CQI. The specific procedure for determining the MCS according to the CQI may refer to the prior art, and is not described herein again.

With reference to the flow shown in fig. 4, an embodiment of the present application further provides a data transmission method, where after receiving the first CQI and the second CQI, the second device may interact with the first device, so that the first device obtains an MCS from the second device, and the first device demodulates and decodes the received signal based on the MCS. Specifically, referring to fig. 5, after S403, the following steps may also be performed:

s404, the second device sends the first MCS and the second MCS to the first device.

Correspondingly, the first device receives a first MCS corresponding to the first modulation scheme and a second MCS corresponding to the second modulation scheme.

The first MCS is used for indicating a first modulation mode and a coding rate of a bit modulated by the first modulation mode. The second MCS is used to indicate a second modulation scheme and a coding rate of bits modulated by the second modulation scheme.

S405, the first device demodulates and decodes the received signal according to the first MCS to obtain a first group of data bits.

Specifically, the first device demodulates a received signal, such as a first modulation symbol, according to a first modulation scheme in the first MCS to obtain a signal with a lower frequency, and decodes the signal with the lower frequency according to a coding rate in the first MCS to obtain a first group of data bits.

S406, the first device demodulates and decodes the received signal according to the second MCS to obtain a second group of data bits.

Specifically, the first device demodulates the received signal according to the second modulation scheme in the second MCS to obtain a signal with a lower frequency, such as an index number corresponding to the first transmission resource unit used for transmitting the first modulation symbol, and decodes the signal with the lower frequency according to the coding rate in the second MCS to obtain a second group of data bits.

With reference to the flow shown in fig. 4, an embodiment of the present application further provides a data transmission method, where after receiving the first CQI and the second CQI, the second device may interact with the first device, so that the first device obtains an MCS from the second device. Subsequently, the first device encodes and modulates the transmitted signal based on the MCS. Specifically, referring to fig. 6, after S403, the following steps may also be performed:

S407, the first device encodes and modulates the first group of data according to the first MCS to obtain a first modulation symbol.

Specifically, the first device encodes the first group of data according to the coding rate in the first MCS to obtain encoded data corresponding to the first group of data, and modulates the encoded data corresponding to the first group of data according to a first modulation scheme in the first MCS, such as 16QAM, to obtain a first modulation symbol.

S408, the first device encodes and modulates the second set of data according to the second MCS to select a first transmission resource unit for transmitting the first modulation symbol.

Specifically, the first device encodes the second group of data according to the coding rate in the second MCS to obtain encoded data corresponding to the second group of data, and modulates the encoded data corresponding to the second group of data according to a second modulation scheme, such as SSK, in the second MCS to select the first transmission resource unit for transmitting the first modulation symbol.

S409, the first device transmits the first modulation symbol by using the first transmission resource unit.

Through the above S404, S407, S408 and S409, the first device transmits data to be transmitted by using two modulation modes through the multi-antenna technology, where a first group of data is transmitted by using a first modulation mode, and a second group of data is transmitted by using a second modulation mode.

In the data transmission method provided in the embodiment of the present application, a first device measures a channel gain set corresponding to a sending resource unit set used for transmitting data, obtains a first channel quality indicator CQI corresponding to a first modulation scheme and a second CQI corresponding to a second modulation scheme according to a plurality of channel gains, and sends the first CQI and the second CQI to a second device. The first modulation mode is used for determining a first modulation symbol, the second modulation mode is used for determining a first transmission resource unit used for transmitting the first modulation symbol in a transmission resource unit set, the transmission resource unit set comprises a plurality of transmission resource units, the channel gain set comprises a plurality of channel gains, and one channel gain in the channel gain set corresponds to one transmission resource unit in the transmission resource unit set. In contrast to the prior art, when determining a Channel Quality Indicator (CQI), common measurement and feedback, i.e. calculating a plurality of transmission resource units, is typically performedAverage of corresponding signal-to-noise ratios, e.g. P_s(|h₀|²+|h₁|²+…+|h_R-1|²)/(Rσ²) The CQI is determined in this way, and the MCS corresponding to the CQI is determined. In the above calculation manner, since the CQI is determined based on the average of the snr corresponding to a plurality of transmission resource units, the modem performance of each bit group is not explicitly shown. And the same CQI based on common measurement and feedback is used for determining the MCS corresponding to the two modulation modes respectively, and the same CQI is possibly suitable for one modulation mode but not suitable for the other modulation mode, so that the problem of unbalanced modulation and demodulation performance of the two bit groups is caused. The data transmission method provided by the embodiment of the application independently performs measurement and feedback of the CQI, that is, based on the measured channel gain, a first CQI and a second CQI corresponding to two modulation schemes are respectively determined and fed back to the second device, so that the second device can determine a first MCS corresponding to the first modulation scheme based on the first CQI and determine a second MCS corresponding to the second modulation scheme based on the second CQI, so that demodulation performance of bit groups modulated by the two modulation schemes is balanced.

The embodiment of the present application further provides a data transmission method, where a first device (e.g., an access network device) itself can obtain an MCS, and demodulate and decode a received signal based on the MCS. Specifically, referring to fig. 7, the method includes the following steps:

s701, the access network equipment measures a channel gain set corresponding to a sending resource unit set used for transmitting data.

The transmission resource unit may be an antenna port, a time domain symbol, or a frequency domain subcarrier.

S702, the access network equipment respectively acquires a first Channel Quality Indicator (CQI) corresponding to the first modulation mode and a second CQI corresponding to the second modulation mode according to the plurality of channel gains.

The first CQI is determined by an absolute value of at least one channel gain in the set of channel gains. The second CQI is determined by a difference between at least two channel gains in the set of channel gains.

S703, the access network equipment determines a first modulation and coding measurement MCS corresponding to the first CQI according to the first CQI, and determines a second MCS corresponding to the second CQI according to the second CQI.

S704, the access network equipment demodulates and decodes the signal received from the terminal according to the first MCS to obtain a first group of data bits.

S705, the access network equipment demodulates and decodes the signal received from the terminal according to the second MCS to obtain a second group of data bits.

With reference to the flow shown in fig. 7, an embodiment of the present application further provides a data transmission method, where a first device (e.g., an access network device) itself can obtain an MCS, and encode and modulate a transmitted signal based on the MCS. Specifically, referring to fig. 8, after S703, the following steps may be further performed:

s706, the access network equipment encodes and modulates the first group of data according to the first MCS to obtain a first modulation symbol.

S707, the access network equipment encodes and modulates the second group of data according to the second MCS to select a first transmission resource unit for transmitting the first modulation symbol.

S708, the access network device sends the first modulation symbol to the terminal by using the first sending resource unit.

The above-mentioned scheme provided by the embodiment of the present application is introduced mainly from the perspective of interaction between different network elements. It is to be understood that the data transmitting apparatus, the data receiving apparatus and the first apparatus contain corresponding hardware structures and/or software modules for performing the respective functions in order to realize the above-described functions. The elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein may be embodied in hardware or in a combination of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present teachings.

In the embodiment of the present application, the data transmission device may be divided into the functional units according to the method example, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing 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. It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation.

Fig. 9 shows a schematic block diagram of a data transmission apparatus provided in an embodiment of the present application. The data transmission apparatus 900 may exist in the form of software, and may also be a device or a component in a device (e.g., a system on a chip). The data transmission apparatus 900 includes: a processing unit 902 and a communication unit 903.

The communication unit 903 may also be divided into a transmitting unit (not shown in fig. 9) and a receiving unit (not shown in fig. 9). Wherein, the sending unit is configured to support the communication apparatus 900 to send information to other network elements. A receiving unit, configured to support the communication apparatus 900 to receive information from other network elements.

When the data transmission apparatus 900 is configured to implement the functions of the data transmission device, for example, the processing unit 902 may be configured to enable the apparatus 900 to perform the determining the first modulation symbol and the first target transmission resource unit in S201, the determining the second modulation symbol and the second target transmission resource unit in S202 in fig. 2, and/or other processes for the schemes described herein. The communication unit 903 is used to support communication between the apparatus 900 and other network elements (e.g., data receiving devices). For example, the communication unit may be configured to enable apparatus 900 to perform the transmitting of the first modulation symbol in S201, the transmitting of the second modulation symbol in S202, and/or other processes for the schemes described herein, as shown in fig. 2.

When the data transmission apparatus 900 is used to implement the functions of the data receiving device in the above method, the processing unit 902 may be used to support the apparatus 900 to perform the determining the first bit group and the second bit group in S203, the determining the third bit group and the fourth bit group in S204 in fig. 2, and/or other processes for the schemes described herein, for example. The communication unit 903 is used to support communication between the apparatus 900 and other network elements (e.g., data transmission devices). For example, the communication unit may be configured to enable apparatus 900 to perform the "receiving first modulation symbols and second modulation symbols" shown in fig. 2 and/or other processes for the schemes described herein.

When the data transmission apparatus 900 is configured to implement the functions of the first device in the above method, the processing unit 902 may be configured to support the apparatus 900 to perform the processes of S401, S402 in fig. 4 and/or other processes for the schemes described herein, for example. The communication unit 903 is used to support communication between the apparatus 900 and other network elements (e.g., data transmission devices). For example, the communication unit may be configured to enable apparatus 900 to perform S403 in fig. 4, and/or other processes for aspects described herein.

Optionally, the data transmission apparatus 900 may further include a storage unit 901 for storing program codes and data of the apparatus 900, and the data may include, but is not limited to, raw data or intermediate data, etc.

The processing unit 902 may be a processor or a controller, and may be, for example, a CPU, a general-purpose processor, a DSP, an ASIC, an 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. A processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, a DSP and a microprocessor, or the like.

The communication unit 903 may be a communication interface, a transceiver circuit, or the like, where the communication interface is referred to as a generic term, and in a specific implementation, the communication interface may include a plurality of interfaces, which may include, for example: terminals and interfaces between terminals and/or other interfaces.

The storage unit 901 may be a memory.

When the processing unit 902 is a processor, the communication unit 903 is a communication interface, and the storage unit 901 is a memory, the data transmission device 1000 according to the embodiment of the present application may be as shown in fig. 10.

Referring to fig. 10, the apparatus 1000 includes: processor 1002, transceiver 1003, memory 1001.

The transceiver 1003 may be a transmitter configured to transmit information to other devices, or may be a receiver configured to receive information from other devices. The transceiver may also be a component that integrates information sending and receiving functions, and the embodiment of the present application does not limit the specific implementation of the transceiver.

Optionally, the apparatus 1000 may also include a bus 1004. The transceiver 1003, the processor 1002, and the memory 1001 may be connected to each other through a bus 1004; the bus 1004 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus 1004 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 10, but this is not intended to represent only one bus or type of bus.

Those of ordinary skill in the art will understand that: in the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, 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 on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (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 including one or more available media integrated servers, data centers, and the like. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., Digital Video Disk (DVD)), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

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 manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be an electric 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 also be distributed on multiple network devices (e.g., terminals). 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 functional unit may exist independently, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

Through the above description of the embodiments, those skilled in the art will clearly understand that the present application can be implemented by software plus necessary general hardware, and certainly, the present application can also be implemented by hardware, but in many cases, the former is a better implementation. Based on such understanding, the technical solutions of the present application may be substantially implemented or a part of the technical solutions contributing to the prior art may be embodied in the form of a software product, where the computer software product is stored in a readable storage medium, such as a floppy disk, a hard disk, or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods described in the embodiments of the present application.

The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and all changes and substitutions within the technical scope of the present application should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A data transmission method, comprising:

in a first sending opportunity, the data sending equipment modulates a first bit group in a bit set to be modulated by adopting a first modulation mode to determine a first modulation symbol; modulating a second bit group in the bit set to be modulated by adopting a second modulation mode to determine a first target sending resource unit; transmitting the first modulation symbol by using the first target transmission resource unit;

on a second sending opportunity, the data sending equipment modulates a third bit group in the bit set to be modulated by adopting the first modulation mode to determine a second modulation symbol; modulating a fourth bit group in the bit set to be modulated by adopting the second modulation mode to determine a second target sending resource unit; transmitting the second modulation symbol by using the second target transmission resource unit; the third bit group includes at least one bit of the second bit group, and the fourth bit group includes at least one bit of the first bit group.

2. The data transmission method according to claim 1, wherein when the modulation order of the first modulation scheme is the same as the modulation order of the second modulation scheme, the third bit group is the second bit group, and the fourth bit group is the first bit group.

3. The data transmission method according to claim 1 or 2, wherein when the modulation order of the first modulation scheme is greater than the modulation order of the second modulation scheme, the third bit group is formed of at least one bit in the first bit group and the second bit group, and the fourth bit group is formed of bits other than the at least one bit in the first bit group.

4. The data transmission method according to claim 1, wherein when a first modulation order of the first modulation scheme is smaller than a second modulation order of the second modulation scheme, the fourth bit group is formed of at least one bit in the second bit group and the first bit group, and the third bit group is formed of bits other than the at least one bit in the second bit group.

5. A data receiving method, comprising:

on a first receiving opportunity, the data receiving equipment determines an index number corresponding to a first target sending resource unit based on a second modulation mode; demodulating a second bit group based on the index number corresponding to the first target sending resource unit; determining a first modulation symbol based on the first target sending resource unit and a first modulation mode; demodulating a first group of bits based on the first modulation symbol;

at a second receiving opportunity, the data receiving equipment determines an index number corresponding to a second target sending resource unit based on the second modulation mode; demodulating a fourth bit group based on the index number corresponding to the second target sending resource unit; determining a second modulation symbol based on the second target transmission resource unit and the first modulation mode; demodulating a third group of bits based on the second modulation symbol; the third group of bits includes at least one bit in the second group of bits, the fourth group of bits includes at least one bit in the first group of bits, and the first group of bits, the second group of bits, the third group of bits, and the fourth group of bits are all used to determine a set of demodulated bits.

6. The data receiving method as claimed in claim 5, wherein when the modulation order of the first modulation scheme is the same as the modulation order of the second modulation scheme, the third bit group is the second bit group, and the fourth bit group is the first bit group.

7. The data receiving method according to claim 5 or 6, wherein when the modulation order of the first modulation scheme is greater than the modulation order of the second modulation scheme, the third bit group is formed by at least one bit in the first bit group and the second bit group, and the fourth bit group is formed by bits other than the at least one bit in the first bit group.

8. The data receiving method according to claim 5, wherein when a first modulation order of the first modulation scheme is smaller than a second modulation order of the second modulation scheme, the fourth bit group is formed by at least one bit in the second bit group and the first bit group, and the third bit group is formed by bits other than the at least one bit in the second bit group.

9. A data transmission apparatus, comprising:

the processing unit is used for modulating a first bit group in a to-be-modulated bit set by adopting a first modulation mode at a first sending opportunity so as to determine a first modulation symbol; modulating a second bit group in the bit set to be modulated by adopting a second modulation mode to determine a first target sending resource unit; the modulation method is further configured to modulate a third bit group in the bit set to be modulated by using the first modulation mode at a second sending opportunity to determine a second modulation symbol; modulating a fourth bit group in the bit set to be modulated by adopting the second modulation mode to determine a second target sending resource unit; the third bit group comprises at least one bit in the second bit group, and the fourth bit group comprises at least one bit in the first bit group;

a sending unit, configured to send the first modulation symbol by using the first target sending resource unit at a first sending opportunity; and transmitting the second modulation symbol by adopting the second target transmission resource unit at a second transmission opportunity.

10. The data transmission device according to claim 9, wherein when the modulation order of the first modulation scheme is the same as the modulation order of the second modulation scheme, the third bit group is the second bit group, and the fourth bit group is the first bit group.

11. The data transmission device according to claim 9 or 10, wherein when the modulation order of the first modulation scheme is greater than the modulation order of the second modulation scheme, the third bit group is formed of at least one bit in the first bit group and the second bit group, and the fourth bit group is formed of bits other than the at least one bit in the first bit group.

12. The data transmission device according to claim 9, wherein when a first modulation order of the first modulation scheme is smaller than a second modulation order of the second modulation scheme, the fourth bit group is formed of at least one bit in the second bit group and the first bit group, and the third bit group is formed of bits other than the at least one bit in the second bit group.

13. A data receiving device, comprising:

a processing unit, configured to determine, at a first receiving occasion, an index number corresponding to a first target sending resource unit based on a second modulation scheme; demodulating a second bit group based on the index number corresponding to the first target sending resource unit; determining a first modulation symbol based on the first target sending resource unit and a first modulation mode; demodulating a first group of bits based on the first modulation symbol; the first modulation mode is used for determining an index number corresponding to a first target sending resource unit on the basis of the first modulation mode; demodulating a fourth bit group based on the index number corresponding to the second target sending resource unit; determining a second modulation symbol based on the second target transmission resource unit and the first modulation mode; demodulating a third group of bits based on the second modulation symbol; the third group of bits includes at least one bit in the second group of bits, the fourth group of bits includes at least one bit in the first group of bits, and the first group of bits, the second group of bits, the third group of bits, and the fourth group of bits are all used to determine a set of demodulated bits.

14. The data receiving apparatus according to claim 13, wherein when the modulation order of the first modulation scheme is the same as the modulation order of the second modulation scheme, the third bit group is the second bit group, and the fourth bit group is the first bit group.

15. The data receiving apparatus according to claim 13 or 14, wherein when the modulation order of the first modulation scheme is greater than the modulation order of the second modulation scheme, the third bit group is formed of at least one bit in the first bit group and the second bit group, and the fourth bit group is formed of bits other than the at least one bit in the first bit group.

16. The data receiving apparatus according to claim 13, wherein when a first modulation order of the first modulation scheme is smaller than a second modulation order of the second modulation scheme, the fourth bit group is formed of at least one bit in the second bit group and the first bit group, and the third bit group is formed of bits other than the at least one bit in the second bit group.

17. A computer-readable storage medium characterized by comprising a program or instructions which, when executed, implement the data transmission method according to any one of claims 1 to 4, or implement the data reception method according to any one of claims 5 to 8.