CN108259124B

CN108259124B - Data transmission method, network equipment and terminal equipment

Info

Publication number: CN108259124B
Application number: CN201611246671.1A
Authority: CN
Inventors: 张朝阳; 王献斌; 张昱; 陈雁
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2016-12-29
Filing date: 2016-12-29
Publication date: 2020-06-16
Anticipated expiration: 2036-12-29
Also published as: CN108259124A

Abstract

The embodiment of the invention provides a data transmission method, network equipment and terminal equipment. The method comprises the following steps: the network device determines N coding rates and N transmission powers for first data, the N coding rates and the N transmission powers corresponding one to one, wherein the N coding rates are different from M coding rates for second data, the N transmission powers are different from M transmission powers for the second data, the M coding rates and the M transmission powers correspond one to one, the N is an integer greater than 1, and the M is an integer greater than or equal to 1; the network equipment sends first indication information to the first terminal equipment; the network equipment receives a first symbol sequence sent by the first terminal equipment; the network device processes the first symbol sequence to obtain the first data. Therefore, the data transmission method provided by the embodiment of the invention can effectively improve the robustness of the system while improving the decoding performance of the system.

Description

Data transmission method, network equipment and terminal equipment

Technical Field

The embodiment of the invention relates to the field of communication, in particular to a data transmission method, network equipment and terminal equipment.

Background

Non-orthogonal Multiple Access (NOMA) is a Multiple Access technology integrating frequency domain, time domain and power domain, which can make Multiple users transmit data on the same time-frequency resource, the transmitting end can naturally superimpose the symbol sequence modulated for the data in the air, the receiving end uses Successive Interference Cancellation (SIC) mode to successively decode the symbol sequence of each user for the superimposed symbol sequences of Multiple users, that is, the base station firstly decodes the symbol sequence with the maximum power, and at the same time subtracts the successfully decoded symbol sequence, then decodes the symbol sequence of the next user, and so on, and successfully decodes the symbol sequences of all users.

However, when the NOMA technique is used for uplink transmission, if the power of the symbol sequences of multiple users reaching the base station is similar, and the SIC technique is used for successive decoding by the base station, the decoding performance of the system is poor due to the existence of the symbol sequences with the same or similar power. In the prior art, in order to improve the decoding performance of the system, a base station controls the transmission power of each of a plurality of users, so that the power of the symbol sequences of the plurality of users reaching the base station is different, and thus, the base station can improve the decoding performance of the system by adopting the SIC technology under the condition that the power corresponding to the symbol sequences of the plurality of users is obviously different. However, since the technology adopts power control for the transmission power of users, some users cannot transmit symbol sequences with the maximum transmission power of the users, the spectrum utilization rate of the system is reduced, and the robustness of the system is low.

Therefore, it is desirable to provide a method, which not only enables the system to have better decoding performance, but also improves the spectrum utilization rate of the system, thereby improving the robustness of the system.

Disclosure of Invention

The embodiment of the invention provides a data transmission method, which can improve the decoding performance of a system, improve the frequency spectrum utilization rate of the system and further improve the robustness of the system.

In a first aspect, a method for data transmission is provided, where the method is applied in a communication system including a network device and at least one terminal device, and the at least one terminal device transmits data using the same time-frequency resource, and the method includes:

the network device determines N coding rates and N transmission powers for first data, where the N coding rates and the N transmission powers correspond to one another, where the N coding rates are different from M coding rates for second data, the N transmission powers are different from M transmission powers for the second data, the M coding rates and the M transmission powers correspond to one another, the N is an integer greater than 1, the M is an integer greater than or equal to 1, the first data is data to be transmitted by a first terminal device of the at least one terminal device, and the second data is data to be transmitted by a second terminal device of the at least one terminal device;

the network equipment sends first indication information to the first terminal equipment, wherein the first indication information comprises rate indication information used for indicating the N coding rates and power indication information used for indicating the N transmission powers;

the network device receives a first symbol sequence sent by the first terminal device, where the first symbol sequence is generated by the first terminal device processing the first data according to the N coding rates and the N transmission powers;

the network device processes the first symbol sequence to obtain the first data.

Therefore, in the method for data transmission provided in the embodiment of the present invention, by configuring N coding rates and N transmission powers for any terminal device by a network device, where the N coding rates and the N transmission powers are different from those of any other terminal device, the network device can correctly decode a symbol sequence generated by processing data to be transmitted according to the N coding rates and the N transmission powers by the terminal device, and at the same time, the terminal device can transmit the symbol sequence by using its own maximum transmission power, thereby effectively improving a spectrum utilization rate and improving system robustness.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the method further includes: and the network equipment sends feedback information to the first terminal equipment, wherein the feedback information is used for informing the first terminal equipment that the network equipment successfully decodes j groups of symbol sequences in the first symbol sequence, and j is less than or equal to N.

Therefore, the network device sends the feedback information aiming at the plurality of groups of symbol sequences in the N groups of symbol sequences at one time to the terminal device, thereby effectively reducing the signaling overhead of the system.

With reference to the first aspect, in a second possible implementation manner of the first aspect, the first data is divided into N groups of data by the first terminal device, where the N groups of data correspond to the N coding rates in a one-to-one manner, the first symbol sequence is generated by the first terminal device by linearly adding N groups of symbol sequences, the N groups of symbol sequences are generated by the first terminal device by processing the N groups of data according to the N coding rates and the N transmission powers, and the N groups of symbol sequences correspond to the N groups of data in a one-to-one manner.

With reference to the first aspect, in a third possible implementation manner of the first aspect, the processing, by the network device, the first symbol sequence to obtain the first data includes:

the network equipment detects the first symbol sequence to obtain N receiving powers corresponding to N groups of symbol sequences in the first symbol sequence one by one;

the network equipment processes the N groups of symbol sequences one by one according to the N receiving powers so as to obtain N groups of data;

and the network equipment obtains the first data according to the N groups of data.

Therefore, the network equipment adopts SIC decoding aiming at the symbol sequence according to the received power, and can keep a SIC decoding algorithm with lower complexity while keeping better decoding performance.

In a second aspect, a method for data transmission is provided, where the method is applied in a communication system including a network device and at least one terminal device, and the at least one terminal device transmits data using the same time-frequency resource, and the method includes:

a first terminal device in the at least one terminal device receives the first indication information sent by the network device, the first indication information includes rate indication information indicating N coding rates for first data and power indication information indicating N transmission powers for the first data, the N coding rates being in one-to-one correspondence with the N transmission powers, wherein the N coding rates are distinct from M coding rates for second data, the N transmit powers are distinct from M transmit powers for the second data, the M coding rates correspond to the M transmitting powers one to one, N is an integer greater than 1, m is an integer greater than or equal to 1, the first data is data to be sent by the first terminal equipment, the second data is data to be sent by a second terminal device in the at least one terminal device;

the first terminal device processes the first data according to the N coding rates and the N transmitting powers to obtain a first symbol sequence;

and the first terminal equipment sends the first symbol sequence to the network equipment.

Therefore, in the method for data transmission provided in the embodiment of the present invention, the terminal device receives the N coding rates and the N transmission powers configured for the terminal device by the network device, where the N coding rates and the N transmission powers are different from those of any other terminal device, and further processes the data to be transmitted according to the N coding rates and the N transmission powers to generate a symbol sequence, so that the network device can correctly decode the symbol sequence, and meanwhile, the terminal device can transmit the symbol sequence by using its own maximum transmission power, thereby effectively improving the spectrum utilization rate and improving the system robustness.

With reference to the second aspect, in a first possible implementation manner of the second aspect, after the first terminal device sends the first symbol sequence to the network device, the method further includes:

and the first terminal equipment receives feedback information sent by the network equipment, wherein the feedback information is used for informing the first terminal equipment that the network equipment successfully decodes j groups of symbol sequences in the first symbol sequence, and j is less than or equal to N.

With reference to the second aspect, in a second possible implementation manner of the second aspect, the method further includes:

the first terminal equipment divides the first data into N groups of data, and the N groups of data correspond to the N coding rates one by one; and

the first terminal device processes the first data according to the N coding rates and the N transmission powers to obtain a first symbol sequence, including:

the first terminal device uses the N coding rates to perform channel coding processing on the N groups of data respectively so as to obtain N groups of coding sequences, wherein the N groups of coding sequences correspond to the N groups of data one by one;

the first terminal device uses the N transmitting powers to perform modulation processing on the N groups of coding sequences so as to obtain N groups of symbol sequences, wherein the N groups of symbol sequences correspond to the N groups of data one by one;

the first terminal equipment linearly adds the N groups of symbol sequences to obtain the first symbol sequence.

In a third aspect, a network device is provided, which may perform the operations of the network device in the first aspect or any optional implementation manner of the first aspect. In particular, the network device may comprise a module unit for performing the operations of the network device in the first aspect or any possible implementation manner of the first aspect.

In a fourth aspect, a terminal device is provided, which may perform the operations of the first terminal device in the second aspect or any optional implementation manner of the second aspect. In particular, the first terminal device may comprise a module unit for performing the operations of the first terminal device in the second aspect or any possible implementation manner of the second aspect.

In a fifth aspect, a network device is provided, which includes: the system comprises a processor, a memory and a transceiver, wherein the processor, the transceiver and the memory are communicated with each other through an internal connection path. The memory is configured to store instructions, and the processor is configured to execute the instructions stored by the memory to control the transceiver to receive signals or transmit signals, and when the processor executes the instructions stored by the memory, the execution causes the processor to execute the first aspect or the method in any possible implementation manner of the first aspect.

In a sixth aspect, a terminal device is provided, which includes: the system comprises a processor, a memory and a transceiver, wherein the processor, the transceiver and the memory are communicated with each other through an internal connection path. The memory is configured to store instructions, and the processor is configured to execute the instructions stored by the memory to control the transceiver to receive signals or transmit signals, and when the processor executes the instructions stored by the memory, the execution causes the processor to execute the method of the second aspect or any possible implementation manner of the second aspect.

In a seventh aspect, a computer storage medium is provided, where the computer storage medium stores program code for instructing a network device to perform operations according to the first aspect or any optional implementation manner of the first aspect.

In an eighth aspect, a computer storage medium is provided, in which program codes are stored, and the program codes are used for instructing to execute operations executed by the first terminal device in the second aspect or any optional implementation manner of the second aspect.

In combination with implementations of the various aspects described above, in some implementations each of the N coding rates is distinct from each of the M coding rates, and each of the N transmit powers is distinct from each of the M transmit powers.

In combination with implementations of the above aspects, in some implementations, an ith group of symbol sequences in the first symbol sequence is determined by the first terminal device according to an ith coding rate and an ith transmission power, and the ith group of symbol sequences is transmitted by the first terminal device according to the ith transmission power, the ith coding rate corresponding to the ith transmission power, and i e [1, N ].

In combination with implementations of the above aspects, in some implementations, the N is 2.

Therefore, in the method for data transmission provided in the embodiment of the present invention, on one hand, a network device configures N coding rates and N transmission powers for any terminal device, where the N coding rates and the N transmission powers are different from those of any other terminal device, and the terminal device processes data to be transmitted through the received N coding rates and the N transmission powers to generate a symbol sequence, so that the network device can correctly decode the symbol sequence, and meanwhile, since the terminal device can transmit the sequence number sequence with its own maximum transmission power, the spectrum utilization is effectively improved, and the system robustness is improved;

on the other hand, the network equipment adopts SIC decoding aiming at the symbol sequence according to the received power, and can keep a SIC decoding algorithm with lower complexity while keeping better decoding performance;

on the other hand, the network device sends the feedback information aiming at the plurality of groups of symbol sequences in the N groups of symbol sequences to the terminal device at one time, so that the signaling overhead of the system is effectively reduced.

Drawings

Fig. 1 is a schematic diagram of a communication system for data transmission applied to an embodiment of the present invention.

Fig. 2 is a schematic flow chart diagram illustrating a method of data transmission of an embodiment of the present invention from a device interaction perspective.

Fig. 3 is a schematic block diagram of a network device for data transmission according to an embodiment of the present invention.

Fig. 4 is a schematic block diagram of a terminal device for data transmission according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a network device for data transmission according to an embodiment of the present invention.

Fig. 6 is a schematic configuration diagram of a terminal device for data transmission according to an embodiment of the present invention.

Detailed Description

The scheme of the embodiment of the invention can be applied to the existing cellular Communication systems, such as global system for Mobile Communication (GSM), Wideband Code Division Multiple Access (WCDMA), LTE and other systems, and the supported Communication is mainly directed to voice and data Communication. Generally, a conventional base station supports a limited number of connections and is easy to implement.

The next generation mobile communication system makes it possible for future mobile data traffic growth, massive internet of things, diversified new services and application scenarios. In addition to serving as a unified connection framework, a basic 5G New air interface (5th Generation New Radio, abbreviated as "5G NR") of a New Generation cellular network is expected to improve the data speed, capacity, delay, reliability, efficiency and coverage capability of the network to a completely New level, and fully utilize available spectrum resources of each bit. In order to meet the rapidly increasing demand for mobile services and to make more efficient use of spectrum resources, the NOMA technology has been proposed.

The basic idea of NOMA technology is to superimpose symbol sequences (i.e. signals) of multiple users in a power domain at a transmitting end, and to perform symbol sequences of different users at a receiving end by using SIC technology. The technology has higher complexity for a receiver at a receiving end, but can improve the utilization rate of frequency spectrum.

Specifically, the transmission of the sub-channels of the NOMA still adopts Orthogonal Frequency Division Multiplexing (OFDM), and the sub-channels are Orthogonal and do not interfere with each other. In contrast to OFDM techniques, a subchannel is no longer allocated to one user, but may be allocated to multiple users, i.e., multiple users share one subchannel (i.e., multiple users use the same time-frequency resources). In both uplink transmission and downlink transmission, a base station allocates corresponding power to different users according to channel information (i.e., channel quality), multiple symbol sequences generated by multiple users on the same subchannel are superposed in the air, a receiving end receives the superposed symbol sequences, and the receiving end sequences all the symbol sequences according to the power and decodes bit sequences of different users in sequence, thereby decoding the bit sequences of all the users correctly. For example, firstly, the symbol sequence corresponding to the maximum power is decoded, the symbol sequences of other users are used as interference information (for the symbol sequences with larger power, interference is relatively small because the power corresponding to the symbol sequences of other users is small), the symbol sequence corresponding to the maximum power is subtracted from the superimposed symbol sequence after decoding is successful, the rest symbol sequences are used as the input of the next stage, and the operation is circulated until all the bit sequences of all the users are decoded successfully, so that the data of each user is obtained.

In the uplink transmission, a plurality of users needing to transmit data on the same channel have similar transmitting powers because of close distance, and then the powers of the users reaching the base station are also similar, and because the powers of the corresponding symbol sequences of the users are similar, the interference between the users is very large, so that the base station can not correctly decode the symbol sequences of the users with similar powers, and the decoding performance of the symbol sequences of the subsequent users is seriously influenced.

In view of the above problems, in the prior art, a base station controls the transmission power of each of a plurality of users, so that the power of the symbol sequences of the plurality of users reaching the base station is different, and thus, the base station performs progressive decoding by using the SIC technology to eliminate interference under the condition that the powers corresponding to the symbol sequences of the plurality of users are significantly different.

Although the above-mentioned technique can make the system have better decoding performance, some users cannot transmit the symbol sequence with their maximum transmission power, for example, user #1 can actually use 10W of transmission power, but since user #1 adopts power control to reduce its transmission power to 5W in order to distinguish it from the transmission power of other users, user #1 cannot transmit the symbol sequence with its maximum transmission power, thus reducing the spectrum utilization of the system and making the system less robust.

In order to solve the above problem, embodiments of the present invention provide a data transmission method, which improves the decoding performance of a system and improves the spectrum utilization rate of the system, thereby effectively improving the robustness of the system.

The embodiments of the present invention have been described in connection with terminal devices. A terminal device may also be referred to as a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a User terminal, a wireless communication device, a User agent, or a User Equipment. The terminal device may be a ST (station) in a WLAN (Wireless Local Area network), and may be a cellular phone, a cordless phone, an SIP (Session Initiation Protocol) phone, a WLL (Wireless Local Loop) station, a PDA (Personal Digital Assistant), a handheld device with a Wireless communication function, a computing device or other processing device connected to a Wireless modem, a vehicle-mounted device, a wearable device, and a terminal device in a future 5G network or a terminal device in a future evolved PLMN network, and the like.

Furthermore, various embodiments of the present invention are described in connection with a network device. The network device may be a device such as a network device for communicating with a mobile device, and the network device may be an ACCESS POINT (AP) in a Wireless Local Area Network (WLAN), a Base Transceiver Station (BTS) in a Code Division Multiple ACCESS (GSM or CDMA) network, an NB (NodeB) in a WCDMA network, an eNB or eNodeB in a Long Term Evolution (LTE) network, an evolved NodeB, a relay Station or an ACCESS POINT, or a vehicle-mounted device, a wearable device, and a network device in a future 5G network or a network device in a future evolved PLMN network.

Moreover, various aspects or features of embodiments of the invention may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used herein is intended to encompass a computer program accessible from any computer-readable device, carrier, or media. For example, computer-readable media can include but are not limited to magnetic storage devices (e.g., hard Disk, floppy Disk, magnetic strips, etc.), optical disks (e.g., CD (Compact Disk), DVD (Digital Versatile Disk), etc.), smart cards, and flash memory devices (e.g., EPROM (Erasable Programmable Read-only memory), card, stick, key drive, etc.). In addition, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

The technical solution in the embodiments of the present invention will be described below with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of a communication system for data transmission applied to an embodiment of the present invention. As shown in fig. 1, the communication system 100 includes a network device 102, and the network device 102 may include a plurality of antennas, e.g.,

antennas

104, 106, 108, 110, 112, and 114. Additionally, network device 102 can additionally include a transmitter chain and a receiver chain, each of which can comprise a plurality of components associated with signal transmission and reception (e.g., processors, modulators, multiplexers, demodulators, demultiplexers, antennas, etc.), as will be appreciated by one skilled in the art.

Network device 102 may communicate with a plurality of terminal devices, such as terminal device 116 and terminal device 122. However, it is understood that network device 102 may communicate with any number of terminal devices similar to

terminal devices

116 or 122.

End devices

116 and 122 may be, for example, cellular phones, smart phones, laptops, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and/or any other suitable device for communicating over wireless communication system 100.

As shown in fig. 1, terminal device 116 is in communication with

antennas

112 and 114, where

antennas

112 and 114 transmit information to terminal device 116 over forward link 118 and receive information from terminal device 116 over reverse link 120. In addition, terminal device 122 is in communication with

antennas

104 and 106, where

antennas

104 and 106 transmit information to terminal device 122 over forward link 124 and receive information from terminal device 122 over reverse link 126.

In a Frequency Division Duplex (FDD) system, forward link 118 can utilize a different Frequency band than that used by reverse link 120, and forward link 124 can utilize a different Frequency band than that used by reverse link 126, for example.

As another example, in Time Division Duplex (TDD) systems and Full Duplex (Full Duplex) systems, forward link 118 and reverse link 120 may use a common frequency band and forward link 124 and reverse link 126 may use a common frequency band.

Each antenna (or group of antennas consisting of multiple antennas) and/or area designed for communication is referred to as a sector of network device 102. For example, antenna groups may be designed to communicate to terminal devices in a sector of the areas covered by network device 102. During communication by network device 102 with

terminal devices

116 and 122 over

forward links

118 and 124, respectively, the transmitting antennas of network device 102 may utilize beamforming to improve signal-to-noise ratio of

forward links

118 and 124. Moreover, mobile devices in neighboring cells can experience less interference when network device 102 utilizes beamforming to transmit to

terminal devices

116 and 122 scattered randomly through an associated coverage area, as compared to a manner in which a network device transmits through a single antenna to all its terminal devices.

At a given time, network device 102, terminal device 116, or terminal device 122 may be a wireless communication transmitting apparatus and/or a wireless communication receiving apparatus. When sending data, the wireless communication sending device may encode the data for transmission. Specifically, the wireless communication transmitting device may obtain (e.g., generate, receive from other communication devices, or save in memory, etc.) a number of data bits to be transmitted over the channel to the wireless communication receiving device. Such data bits may be contained in a transport block (or transport blocks) of data, which may be segmented to produce multiple code blocks.

In addition, the communication system 100 may be a Public Land Mobile Network (PLMN) Network, a D2D Network, an M2M Network, or other networks, and fig. 1 is a simplified schematic diagram for example, and the Network may further include other Network devices, which are not shown in fig. 1.

The embodiment of the invention is applied to a communication system comprising network equipment and at least one terminal equipment, wherein the at least one terminal equipment transmits data by using the same time-frequency resource.

Hereinafter, a method for data transmission according to an embodiment of the present invention is described in detail with reference to fig. 2.

Fig. 2 is a schematic flow chart of a method for data transmission according to an embodiment of the present invention from the perspective of device interaction, and an execution subject for implementing the method 200 is a network device and a first terminal device of the at least one terminal device, respectively.

Optionally, the network device may be a base station, and the first terminal device may be a user equipment.

Hereinafter, the method for data transmission according to the embodiment of the present invention is described in detail by taking an example of interaction between a network device and a first terminal device without loss of generality. It should be understood that the first terminal device may be any one of the at least one terminal device, and the "first" is used for distinguishing and explaining only, and should not constitute any limitation to the present invention.

The method 200 comprises the steps of:

s210, a network device determines N coding rates and N transmission powers for first data, where the N coding rates are in one-to-one correspondence with the N transmission powers, where the N coding rates are different from M coding rates for second data, the N transmission powers are different from M transmission powers for the second data, the M coding rates are in one-to-one correspondence with the M transmission powers, the N is an integer greater than 1, the M is an integer greater than or equal to 1, the first data is data to be transmitted by a first terminal device of the at least one terminal device, and the second data is data to be transmitted by a second terminal device of the at least one terminal device.

Specifically, the network device # a (i.e., an example of the network device) determines a total coding rate and a total transmission power of the terminal device # a according to a current Quality of Service (QoS) of the system and a maximum transmission power of the terminal device # a (i.e., an example of the first terminal device), further divides the total coding rate into N coding rates, and divides the total transmission power into N transmission powers, where the N coding rates and the N transmission powers are in one-to-one correspondence, and N is an integer greater than 1. That is, the network device # a may configure the terminal device # a with a plurality of coding rates and a plurality of transmission powers so that the terminal device # a may process for the data # a based on the N coding rates and the N transmission powers.

Meanwhile, when the network device # a configures coding rates and transmission powers for a plurality of terminal devices using the same time-frequency resource, the coding rates of the plurality of terminal devices are different from each other, the transmission powers of the plurality of terminal devices are different from each other, and each terminal device of at least some terminal devices among the plurality of terminal devices corresponds to at least two coding rates and two transmission powers, and each terminal device except the at least some terminal devices among the plurality of terminal devices may correspond to at least one coding rate and at least one transmission power. In other words, the network device # a may configure at least two coding rates and two transmission powers for some of the plurality of terminal devices, and may also configure one coding rate and one transmission power for each of the remaining terminal devices.

That is, when there are terminal devices with similar powers, the network device # a may configure a plurality of coding rates and a plurality of transmission powers for each terminal device in a part of the terminal devices, and configure one coding rate and one transmission power for each terminal device in another part of the terminal devices, and at the same time, the network device # a does not need to perform power control for the terminal devices configured with one coding rate and one transmission power, and configures the transmission power for the terminal devices directly based on the maximum transmission power of the terminal devices. It is sufficient that, as viewed from the network device # a, a plurality of coding rates and a plurality of transmission powers configured for different terminal devices are all different.

Of course, when there are terminal apparatuses having similar power, the network apparatus # a may configure a plurality of coding rates and a plurality of transmission powers for each of the plurality of terminal apparatuses. Also, it is possible to view from the network device # a that the plurality of coding rates and the plurality of transmission powers configured for different terminal devices are all different.

By way of example and not limitation, the scheme that network device # a determines N coding rates and N transmit powers based on QoS and the maximum transmit power required by each terminal device is merely illustrative, and the embodiments of the present invention are not limited thereto, and any scheme that determines the N coding rates and the N transmit powers is within the scope of the embodiments of the present invention.

By way of example and not limitation, the following describes an embodiment of the present invention in detail by taking any two terminal devices (i.e., a first terminal device and a second terminal device) of a plurality of terminal devices as an example.

The network device # a configures the terminal device # a with N coding rates and N transmission powers for data # a, and configures a terminal device # B (i.e., an instance of a second terminal device) with M coding rates and M transmission powers for data # B (i.e., an instance of a second data), where the N coding rates are different from the M coding rates, the N transmission powers are different from the M transmission powers, the M coding rates are different from the M transmission powers, N is an integer greater than 1, M is an integer greater than or equal to 1, and the N and the M may be equal or unequal.

It should be noted that the N coding rates are different, the N transmission powers are different, the M coding rates are different, and the M transmission powers are different. In other words, the plurality of code rates corresponding to each terminal device are different, and the plurality of transmission powers corresponding to each terminal device are different.

The total transmission power of the terminal apparatus # a and the total transmission power of the terminal apparatus # B may be the same or different, and the specific situation depends on the channel information.

In the following, taking N as an example, and taking the terminal apparatus # a and the terminal apparatus # B using the same total transmission power and different transmission powers and coding rates configured by the network apparatus for the terminal apparatus # a and the terminal apparatus # B as examples for convenience of description, the embodiments of the present invention will be described in detail with reference to the relevant data in table 1.

For example, according to the QoS of the current network, and the maximum transmission powers respectively corresponding to terminal apparatus # a and terminal apparatus # B, network apparatus # a configures terminal apparatus # a with total coding rate # a (i.e., 3.2bit/s) and total transmission power # a (i.e., 10W), and configures terminal apparatus # B with total coding rate # B (i.e., 3.2bit/s) and total transmission power # a (i.e., 10W); further, the total coding rate # a (i.e., 3.2bit/s) is divided into two parts, i.e., a coding rate # a1 (i.e., 1.6bit/s) and a coding rate # a2 (i.e., 2bit/s), and the total coding rate # B (i.e., 3.2bit/s) is divided into two parts, i.e., a coding rate # B1 (i.e., 1.7bit/s) and a coding rate # B2 (i.e., 1.9 bit/s); meanwhile, the total transmission power # a is divided into two parts, i.e., transmission power # a1 (i.e., 8W) and transmission power # a2 (i.e., 2W), and the total transmission power # B is divided into two parts, i.e., transmission power # B1 (i.e., 7W) and transmission power # B2 (i.e., 3W). In this way, it is ensured that the two transmission powers for the terminal apparatus # a and the two transmission powers for the terminal apparatus # B are different from each other. That is to say, the network device # a allocates four different transmission powers to two terminal devices at the same time, so that the problem of low decoding efficiency of the system due to the fact that the transmission powers of different terminal devices are the same can be effectively solved, and meanwhile, each terminal device can transmit a symbol sequence by using the maximum transmission power of the terminal device, so that the spectrum utilization rate is improved, and the system robustness is improved.

For another example, in the case where the maximum transmission powers of the terminal apparatus # a and the terminal apparatus # B are the same, the network apparatus # a may configure only two coding rates and two transmission powers for the terminal apparatus # a, and configure one coding rate and one transmission power for the terminal apparatus # B. Specifically, according to the QoS of the current network, and the maximum transmission powers respectively corresponding to terminal apparatus # a and terminal apparatus # B, network apparatus # a configures terminal apparatus # a with a total coding rate # a (i.e., 3.2bit/s) and a total transmission power # a (i.e., 10W), and configures terminal apparatus # B with a total coding rate # B (i.e., 3.2bit/s) and a total transmission power # a (i.e., 10W); further, the total coding rate # a (i.e., 3.2bit/s) is divided into two parts, i.e., the coding rate # a1 (i.e., 1.6bit/s) and the coding rate # a2 (i.e., 2bit/s), and the total transmission power # a is divided into two parts, i.e., the transmission power # a1 (i.e., 8W) and the transmission power # a2 (i.e., 2W), and the total coding rate and the total transmission power of the terminal apparatus # a do not need to be divided. Thus, for the network device # a, the three transmission powers are different from each other, which can effectively avoid the problem of low decoding efficiency of the system due to the same transmission power of different terminal devices, and meanwhile, each terminal device can use its own maximum transmission power to transmit the symbol sequence, thereby improving the spectrum utilization rate and improving the system robustness.

TABLE 1

It should be understood that, the total transmission power required by two terminal devices is the same or similar, and there may be a case that the system robustness is low as in the prior art, and the above case that the total transmission power required by two terminal devices is the same is merely an example shown for convenience of description, and should not be limited to the embodiment of the present invention.

It should also be understood that, by way of example and not limitation, in the embodiment of the present invention, the description is given by taking two terminal devices as an example, which is only an illustrative description, and the coding rate and the transmission power configured by the base station for multiple terminal devices using the same time-frequency resource are different. In other words, it can also be understood that the terminal apparatus # a and the terminal apparatus # B may be any two terminal apparatuses in at least one terminal apparatus using the same time-frequency resource, and the coding rate and the transmission power of any two terminal apparatuses are different, so that the coding rate and the transmission power configured between the plurality of terminal apparatuses are also different.

S220, the network device sends first indication information to the first terminal device, where the first indication information includes rate indication information for indicating the N coding rates and power indication information for indicating the N transmission powers.

The network device # a sends the determined N coding rates and N transmission powers for the terminal device # a to the terminal device # a by way of indication information, for example, by way of first indication information, where the first indication information includes rate indication information for indicating the N coding rates and power indication information for indicating the N transmission powers.

Further, after S220, the terminal apparatus # a receives the first indication information, thereby being able to acquire N coding rates and N transmission powers for the data # a.

S230, the first terminal device processes the first data according to the N coding rates and the N transmission powers to obtain a first symbol sequence.

As a possible implementation, the terminal device # a may divide the data # a into N groups of data according to the N coding rates, where the N groups of data correspond to the N coding rates one to one.

Optionally, S230 may specifically include:

the first terminal device uses the N transmitting powers to perform modulation processing aiming at the N groups of coding sequences so as to obtain N groups of symbol sequences, and the N groups of symbol sequences are in one-to-one correspondence with the N groups of data;

the first terminal device linearly adds the N groups of symbol sequences to obtain the first symbol sequence;

the first terminal device sends the first symbol sequence to the network device.

As can be seen from the above description, the N groups of data correspond to the N coding rates one to one, and thus, the N groups of data correspond to the N transmission powers one to one. Hereinafter, the embodiment of the present invention will be described by taking as an example the processing procedure of the terminal device # a for one set of data (for convenience of distinction and explanation, it is denoted as data # a1), and the processing procedure of the terminal device for other N-1 set of data is the same as the processing procedure for data # a1, and the description thereof will be omitted here for the sake of avoiding redundancy.

Specifically, the terminal apparatus # a performs channel coding processing on the data # a1 using a coding rate corresponding to the data # a1 to obtain a code sequence corresponding to the data # a (for convenience of distinction and explanation, referred to as a code sequence # a1), and further maps the code sequence # a1 to a complex symbol, that is, a symbol sequence corresponding to the data # a1, using transmission power corresponding to the data # a1 and the code sequence # a1 according to a mapping rule. The specific implementation process is similar to that of the prior art, and the detailed description is omitted here to avoid redundancy.

Thus, the terminal device # a performs the same processing as described above for the other N-1 group of data, and finally obtains N groups of symbol sequences corresponding to the N groups of data one by one, and further, the terminal device # a linearly superimposes the N groups of symbol sequences to obtain a first symbol sequence.

Further, S240, the first terminal device sends the first symbol sequence to the network device.

Specifically, when the terminal device # a transmits the first symbol sequence, the ith group of symbol sequences is transmitted using the ith transmission power corresponding to the ith group of symbol sequences in the first symbol sequence, where i ∈ [1, N ], and the first symbol sequence is further transmitted to the network device # a.

Thus, after S240, the network device # a receives the first symbol sequence transmitted by the terminal device # a.

S250, the network device processes the first symbol sequence to obtain the first data.

Optionally, S250 may specifically include:

the network device detects the first symbol sequence to obtain N receiving powers corresponding to N groups of symbol sequences in the first symbol sequence one by one;

the network device obtains the first data according to the N groups of data.

Specifically, the first symbol sequence received by the network device # a is a symbol sequence obtained by linearly adding N sets of symbol sequences, and the network device # a needs to correctly decode each symbol sequence to obtain the data # a1 of the terminal device # a.

In a possible implementation manner, the network device # a1 obtains N receiving powers corresponding to N groups of symbol sequences one to one by detecting the first symbol sequence, where the N receiving powers correspond to the N transmitting powers one to one, and each receiving power is smaller than the corresponding transmitting power due to energy loss during signal transmission; then, according to the N received powers, decoding processing is performed on the N groups of symbol sequences one by one, and more specifically, during the decoding process of the symbol sequences, interference needs to be eliminated step by step so as to obtain the N groups of data, and further, data # a1 is obtained.

Since the N received powers are all different, when the network device # a1 decodes any one symbol sequence, the received powers corresponding to other symbol sequences are all interference to the symbol sequence being processed, the decoding processing procedures are different, the requirements for decoding algorithms are different, and further, the requirements for the network device # a are also different.

Therefore, in order to reduce the complexity in the decoding process and reduce the requirement of the network device # a for the decoding algorithm, the network device # a may sequence the N received symbol sequences in descending order according to the received power, so that the network device # a sequences the received power, and processes the N symbol sequences one by one, that is, the network device # a preferentially processes the symbol sequence with the highest power, because the symbol sequence with the higher power is easier to capture, and the power of other symbol sequences interferes less, so that the symbol sequence with the higher power can be decoded correctly.

When at least one terminal device exists in the system, the network device # a receives a symbol sequence (for convenience of distinction and explanation, denoted as a second symbol sequence) in which P symbol sequences are naturally superimposed in the air, where P is greater than or equal to N, N groups of symbol sequences of the terminal device # a are part or all of the P symbol sequences, and the network device # a sorts the P symbol sequences together according to the power sequence, decodes the sequences successively, and finally obtains data of each terminal device.

When there is only one terminal device (e.g., terminal device # a) in the system, P is equal to N, and the symbol sequence received by the network device # a is the first symbol sequence, i.e., the first symbol sequence number is the same as the second symbol sequence number;

when there are a plurality of terminal devices in the system, P > N, the network device # a performs decoding processing not only on the N sets of symbol sequences but also on symbol sequences of other terminal devices at the same time. As for the terminal apparatus # a, as described above, the network apparatus # a also orders the received N sets of symbol sequences according to the power and performs successive decoding processing according to the order of the power during the process of ordering and processing the P symbol sequences including the N sets of symbol sequences according to the power.

Next, a detailed description will be given of a processing procedure of the network device # a for the second symbol sequence, taking the second symbol sequence of the network device # a for at least one terminal device as an example.

The network device # A carries out decoding processing on the ith group of symbol sequences to obtain ith group of data, wherein i belongs to [1, P ];

and the network equipment subtracts the ith group of symbol sequences from the P-i +1 group of symbol sequences, and takes the generated P-i group of symbol sequences as the symbol sequences required by the network equipment to process the (i + 1) th group of symbol sequences.

It should be noted that the ith symbol sequence represents any one of the P symbol sequences, the ith data represents any one of the P group data, and i e ∈ [1, P ] represents that the network device # a repeats the above processing for each of the P symbol sequences, thereby obtaining the P group data.

For convenience of description, in the embodiment of the present invention, the decoding process of the network device # a for the symbol sequence with the largest power is referred to as the first-stage decoding, the decoding process next to the symbol sequence with the largest power is referred to as the second-stage decoding, and so on, and the decoding process for the symbol sequence with the smallest power is referred to as the nth-stage decoding.

In the decoding process of each stage, the network device # a further needs to subtract the successfully decoded symbol sequence from the current symbol sequence, and use the remaining symbol sequence as the input of the next stage, so as to reduce the interference of the symbol sequence with higher power to the symbol sequence with lower power.

In other words, the input object of each stage is the ith group of symbol sequences, and the output object of each stage is two, one is the ith group of data obtained after decoding is successful, and the other is the symbol sequence after the ith group of symbol sequences is removed from the current symbol sequence.

Hereinafter, the network device # a will be explained with reference to P being 4, and the 4-group symbol sequence may be a symbol sequence corresponding to one terminal device or a symbol sequence corresponding to two terminal devices, and the following explanation will be made in detail.

And (3) first-level decoding: the network device # a decodes the symbol sequence with the highest power (for convenience of distinction and explanation, referred to as symbol sequence #1), subtracts the symbol sequence #1 from the four symbol sequences after the decoding is successful, and outputs the remaining symbol sequences (for convenience of distinction and explanation, referred to as symbol sequence #2+ symbol sequence #3+ symbol sequence #4) as the input of the next stage, that is, as the output target: data corresponding to symbol sequence #1, symbol sequence #2+ symbol sequence #3+ symbol sequence # 4;

and (3) second-stage decoding: the network device # a decodes the symbol sequence with a large power (i.e., symbol sequence #2), subtracts the symbol sequence #2 from the symbol sequence with a large power, and outputs the remaining symbol sequence (i.e., symbol sequence #3+ symbol sequence #4) as the input of the next stage, that is, the output target is: data corresponding to symbol sequence #2, symbol sequence #3+ symbol sequence # 4;

and (3) third-stage decoding: the network device # a decodes the symbol sequence with a large power (i.e., symbol sequence #3), subtracts the symbol sequence #3 from the two symbol sequences after the decoding is successful, and outputs the remaining symbol sequence (i.e., symbol sequence #4) as the input of the next stage, i.e., the output target is: data corresponding to symbol sequence #3, symbol sequence # 4;

fourth-stage decoding: the input object is a set of symbol sequence, i.e., symbol sequence #4, and the network device # a decodes the symbol sequence #4, and after the decoding is successful, outputs the data corresponding to the symbol sequence # 4.

In this way, the decoding process for the 4 groups of symbol sequences is completed, and finally the data of the at least one terminal device is obtained.

When two terminal apparatuses (for example, terminal apparatus # a and terminal apparatus # B) are included in the system, it is assumed that the symbol sequence of terminal apparatus # a is symbol sequence #1 and symbol sequence #3, and the symbol sequence of terminal apparatus # B is symbol sequence #2 and symbol sequence # 4. Then, as for the terminal apparatus # a, as described above, the network apparatus # a also orders the received 2 groups of symbol sequences for the terminal apparatus # a according to the power size and performs successive decoding processing according to the order of the power size in the process of ordering and processing the four groups of symbol sequences according to the power size, and the first symbol sequence is obtained by linearly adding the symbol sequence #1 and the symbol sequence # 3;

similarly, for the terminal apparatus # B, as described above, the network apparatus # a also orders the two groups of received symbol sequences for the terminal apparatus # B according to the power and performs successive decoding processing according to the order of the power during the process of ordering and processing the four groups of symbol sequences according to the power;

for the network device # a, the decoding process for the symbol sequence #1 is the first-stage decoding, the decoding process for the symbol sequence #2 is the second-stage decoding, the processing for the symbol sequence #3 is the third-stage decoding, and the processing for the symbol sequence #4 is the fourth-stage decoding.

When one terminal device (e.g., terminal device # a) is included in the system, the first symbol sequence number is identical to the second symbol sequence. That is, when the system includes a plurality of terminal devices, the network device # a performs decoding processing according to the power levels corresponding to the plurality of groups of symbol sequences instead of decoding the symbol sequence of one terminal device successfully and then decoding the symbol sequence of the next terminal device, data of some terminal devices may not be obtained after decoding all the symbol sequences, and data of some terminal devices may be obtained in the decoding process, which is related to the difference between the plurality of transmission powers configured by the network device for each terminal device. For example, the larger the difference, the longer the terminal equipment obtains data.

However, for the terminal apparatus # a, the network apparatus # a processes the N groups of symbol sequences one by one according to the N received powers, thereby obtaining the N groups of data, and further obtaining the data # a.

As an example and not by way of limitation, the above-described processing procedure of the network device # a for four groups of symbol sequences in the second symbol sequence is only a schematic illustration shown for convenience of description, the second symbol sequence may be any multiple groups of symbol sequences, and any multiple groups of symbol sequences may be symbol sequences of any multiple terminal devices, and the embodiment of the present invention is not limited thereto.

Compared with the prior art, in the process of decoding the symbol sequence, for the terminal device # a, the first-level decoding of the network device # a for the symbol sequence of the terminal device # a is changed into the N-level decoding in the scheme, and if the result of each level of decoding is to send feedback information to the terminal device # a, the system signaling overhead is increased.

Therefore, in the embodiment of the present invention, optionally, the method further includes:

the network device sends feedback information to the first terminal device, where the feedback information is used to inform the first terminal device that the network device successfully decodes j groups of symbol sequences in the first symbol sequence, where j is less than or equal to N.

Specifically, in the process of decoding the symbol sequence, the network device # a performs N-level decoding process on the first symbol sequence of the terminal device # a, and for j groups of symbol sequences with correct decoding, the network device # a only needs to send feedback information to the terminal device # a once after the last decoding of the j groups of symbol sequences is successful, so as to inform the terminal device # a that the network device # a successfully decodes the j groups of symbol sequences, where j is less than or equal to N.

It should be noted that, when j < N, the decoding of the j groups of symbol sequences is successful, and then the decoding of the remaining N-j groups of symbol sequences is inevitably failed; when j is equal to N, the above-mentioned j groups of symbol sequences are successfully decoded, which means that all the symbol sequences for the terminal apparatus # a are successfully decoded.

In this way, the network device # a effectively reduces the signaling overhead of the system by transmitting the feedback information for a plurality of sets of symbol sequences to the terminal device at once.

While the method for data transmission according to the embodiment of the present invention is described in detail above with reference to fig. 1 to 2, the device for data transmission (i.e., the network device and the terminal device) according to the embodiment of the present invention is described below with reference to fig. 3 to 6, and the technical features described in the method embodiment are also applicable to the following device embodiments.

Fig. 3 shows a network device for data transmission according to an embodiment of the present invention, which is applied in a communication system including the network device and at least one terminal device, where the at least one terminal device transmits data using the same time-frequency resource, and the network device 300 includes:

a processing unit 310, configured to determine N coding rates and N transmission powers for first data, where the N coding rates are in one-to-one correspondence with the N transmission powers, where the N coding rates are different from M coding rates for second data, the N transmission powers are different from M transmission powers for the second data, the M coding rates are in one-to-one correspondence with the M transmission powers, the N is an integer greater than 1, the M is an integer greater than or equal to 1, the first data is data to be transmitted by a first terminal device of the at least one terminal device, and the second data is data to be transmitted by a second terminal device of the at least one terminal device;

a sending unit 320, configured to send first indication information to the first terminal device, where the first indication information includes rate indication information for indicating the N coding rates and power indication information for indicating the N transmission powers;

a receiving unit 330, configured to receive a first symbol sequence sent by the first terminal device, where the first symbol sequence is generated by the first terminal device by processing the first data according to the N coding rates and the N transmit powers;

the processing unit 310 is further configured to process the first symbol sequence to obtain the first data.

Therefore, in the network device for data transmission provided in the embodiment of the present invention, by configuring N coding rates and N transmission powers for any terminal device, where the N coding rates and the N transmission powers are different from those of any other terminal device, the network device can correctly decode a symbol sequence generated by processing data to be transmitted according to the N coding rates and the N transmission powers, and at the same time, the terminal device can transmit the symbol sequence by using its own maximum transmission power, thereby effectively improving the spectrum utilization rate and improving the system robustness.

Optionally, the sending unit 320 is further configured to:

and sending feedback information to the first terminal device, where the feedback information is used to inform the first terminal device that the network device successfully decodes j groups of symbol sequences in the first symbol sequence, where j is less than or equal to N.

Optionally, the first data is divided into N groups of data by the first terminal device, the N groups of data correspond to the N coding rates one to one, the first symbol sequence is generated by the first terminal device by linearly adding N groups of symbol sequences, the N groups of symbol sequences are generated by the first terminal device by processing the N groups of data according to the N coding rates and the N transmission powers, respectively, and the N groups of symbol sequences correspond to the N groups of data one to one.

Optionally, the processing unit 310 is specifically configured to:

detecting the first symbol sequence to obtain N receiving powers corresponding to the N groups of symbol sequences in the first symbol sequence one by one;

processing the N groups of symbol sequences one by one according to the N receiving powers to obtain N groups of data;

and obtaining the first data according to the N groups of data.

The network device 300 for data transmission according to the embodiment of the present invention may correspond to the network device in the method according to the embodiment of the present invention, and each unit, i.e. module, and the other operations and/or functions described above in the network device 300 for data transmission are respectively for implementing the corresponding flow executed by the network device in the method 200, and are not burdensome here for brevity.

Therefore, on one hand, the network device for data transmission provided in the embodiment of the present invention configures N coding rates and N transmission powers for any terminal device, where the N coding rates and the N transmission powers are different from those of any other terminal device, so that the network device can correctly decode a symbol sequence generated by processing data to be transmitted according to the N coding rates and the N transmission powers by the terminal device, and at the same time, the terminal device can transmit the symbol sequence by using its own maximum transmission power, thereby effectively improving a spectrum utilization rate and improving system robustness;

on the other hand, the network equipment effectively reduces the signaling overhead of the system by sending the feedback information aiming at the plurality of groups of symbol sequences in the N groups of symbol sequences to the terminal equipment at one time;

on the other hand, the network device adopts SIC decoding for the symbol sequence according to the received power, so that the SIC decoding algorithm with lower complexity can be maintained while the better decoding performance can be maintained.

Fig. 4 shows a terminal device for data transmission according to an embodiment of the present invention, which is applied in a communication system including a network device and at least one terminal device, where the terminal device is a first terminal device in the at least one terminal device, and the at least one terminal device transmits data using the same time-frequency resource, and the terminal device 400 includes:

a receiving unit 410, configured to receive first indication information sent by the network device, where the first indication information includes rate indication information for indicating N coding rates for first data and power indication information for indicating N transmission powers for the first data, where the N coding rates are in one-to-one correspondence to the N transmission powers, where the N coding rates are different from M coding rates for second data, the N transmission powers are different from M transmission powers for the second data, the M coding rates are in one-to-one correspondence to the M transmission powers, where N is an integer greater than 1, M is an integer greater than or equal to 1, the first data is data to be sent by the first terminal device, and the second data is data to be sent by a second terminal device of the at least one terminal device;

a processing unit 420, configured to process the first data according to the N coding rates and the N transmission powers to obtain a first symbol sequence;

a sending unit 430, configured to send the first symbol sequence to the network device.

Therefore, according to the terminal device for data transmission provided in the embodiment of the present invention, by receiving the N coding rates and the N transmission powers configured for the terminal device by the network device, where the N coding rates and the N transmission powers are different from those of any other terminal device, and further processing the data to be transmitted according to the N coding rates and the N transmission powers to generate the symbol sequence, the network device can correctly decode the symbol sequence, and meanwhile, the terminal device can transmit the symbol sequence with its own maximum transmission power, so that the spectrum utilization rate is effectively improved, and the system robustness is improved.

Optionally, after the sending unit 430 sends the first symbol sequence to the network device, the receiving unit 410 is further configured to:

and receiving feedback information sent by the network equipment, wherein the feedback information is used for informing the first terminal equipment that the network equipment successfully decodes j groups of symbol sequences in the first symbol sequence, and j is less than or equal to N.

Optionally, the processing unit 420 is further configured to:

dividing the first data into N groups of data, wherein the N groups of data correspond to the N coding rates one by one; and

the processing unit 420 is specifically configured to:

processing the first data according to the N coding rates and the N transmit powers to obtain a first symbol sequence, comprising:

using the N coding rates to perform channel coding processing on the N groups of data respectively to obtain N groups of coding sequences, wherein the N groups of coding sequences correspond to the N groups of data one by one;

using the N transmitting powers to perform modulation processing on the N groups of coding sequences to obtain N groups of symbol sequences, wherein the N groups of symbol sequences correspond to the N groups of data one by one;

the N sets of symbol sequences are linearly added to obtain the first symbol sequence.

The terminal device 400 for data transmission according to the embodiment of the present invention may correspond to the first terminal device in the method according to the embodiment of the present invention, and each unit, i.e. module, and the other operations and/or functions described above in the terminal device 400 for data transmission are respectively for implementing the corresponding flow executed by the first terminal device in the method 200, and are not burdensome here for brevity.

Fig. 5 illustrates a network device for data transmission according to an embodiment of the present invention, which is used in a communication system including the network device and at least one terminal device, and the at least one terminal device transmits data using the same time-frequency resources.

As shown in fig. 5, the network device 500 includes: comprises a processor 510, a transceiver 520 and a memory 530, wherein the processor 510, the transceiver 520 and the memory 530 are communicated with each other through an internal connection path. The memory 530 is used for storing instructions, and the processor 510 is used for executing the instructions stored by the memory 530 to control the transceiver 520 to receive signals or transmit signals.

The processor 510 is configured to determine N coding rates and N transmission powers for first data, where the N coding rates are in one-to-one correspondence with the N transmission powers, where the N coding rates are different from M coding rates for second data, the N transmission powers are different from M transmission powers for the second data, the M coding rates are in one-to-one correspondence with the M transmission powers, the N is an integer greater than 1, the M is an integer greater than or equal to 1, the first data is data to be transmitted by a first terminal device of the at least one terminal device, and the second data is data to be transmitted by a second terminal device of the at least one terminal device;

the transceiver 520, configured to send first indication information to the first terminal device, where the first indication information includes rate indication information indicating the N coding rates and power indication information indicating the N transmission powers;

the transceiver 520 is further configured to receive a first symbol sequence sent by the first terminal device, where the first symbol sequence is generated by the first terminal device according to the N coding rates and the N transmission powers for the first data;

the processor 510 is further configured to process the first symbol sequence to obtain the first data.

Optionally, the transceiver 520 is further configured to:

Optionally, the processor 510 is specifically configured to:

and obtaining the first data according to the N groups of data.

It should be understood that, in the embodiment of the present invention, the processor 510 may be a Central Processing Unit (CPU), and the processor 510 may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory 530 may include both read-only memory and random access memory, and provides instructions and data to the processor 510. A portion of memory 530 may also include non-volatile random access memory. For example, memory 530 may also store device type information.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 510. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 530, and the processor 510 reads the information in the memory 530 and performs the steps of the above method in combination with the hardware thereof. To avoid repetition, it is not described in detail here.

The network device 500 for data transmission according to the embodiment of the present invention may correspond to the network device for performing the method 200 in the method 200 and the network device 300 for data transmission according to the embodiment of the present invention, and each unit or module in the network device 500 is respectively configured to perform each action or processing procedure performed by the network device in the method 200, and a detailed description thereof is omitted here for avoiding redundancy.

Fig. 6 shows a terminal device for data transmission according to an embodiment of the present invention, which is applied in a communication system including a network device and at least one terminal device, where the terminal device is a first terminal device of the at least one terminal device, and the at least one terminal device transmits data using the same time-frequency resource.

As shown in fig. 5, the terminal apparatus 600 includes: comprises a processor 610, a transceiver 620 and a memory 630, wherein the processor 610, the transceiver 620 and the memory 630 are communicated with each other through an internal connection path. The memory 630 is used for storing instructions, and the processor 610 is used for executing the instructions stored in the memory 630 to control the transceiver 620 to receive signals or transmit signals.

The transceiver 620 is configured to receive first indication information sent by the network device, where the first indication information includes rate indication information for indicating N coding rates for first data and power indication information for indicating N transmission powers for the first data, where the N coding rates correspond to the N transmission powers one to one, where the N coding rates are different from M coding rates for second data, the N transmission powers are different from M transmission powers for the second data, the M coding rates correspond to the M transmission powers one to one, the N is an integer greater than 1, the M is an integer greater than or equal to 1, the first data is data to be sent by the first terminal device, and the second data is data to be sent by a second terminal device of the at least one terminal device;

the processor 610 is configured to process the first data according to the N coding rates and the N transmission powers to obtain a first symbol sequence;

the transceiver 620 is also configured to transmit the first symbol sequence to the network device.

Optionally, after the transceiver 620 transmits the first symbol sequence to the network device, the transceiver 620 is further configured to:

Optionally, the processor 610 is further configured to:

the processor 610 is specifically configured to:

It should be understood that, in the embodiment of the present invention, the processor 610 may be a Central Processing Unit (CPU), and the processor 610 may also be other general processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory 630 may include both read-only memory and random access memory, and provides instructions and data to the processor 610. A portion of the memory 630 may also include non-volatile random access memory. For example, the memory 630 may also store device type information.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 610. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 630, and the processor 610 reads the information in the memory 630 and performs the steps of the above method in combination with the hardware thereof. To avoid repetition, it is not described in detail here.

The network device 600 for data transmission according to the embodiment of the present invention may correspond to the first terminal device in the method 200 for executing the method 200 and the terminal device 300 for data transmission according to the embodiment of the present invention, and each unit or module in the terminal device 600 is respectively used for executing each action or processing procedure executed by the terminal device in the method 200, and here, detailed descriptions thereof are omitted for avoiding redundancy.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. 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 invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the unit is only one logical functional 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 through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The above description is only an embodiment of the present invention, but the scope of the embodiments of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the embodiments of the present invention, and all the changes or substitutions should be covered by the scope of the embodiments of the present invention. Therefore, the protection scope of the embodiments of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for data transmission, applied to a communication system including a network device and at least one terminal device, wherein the at least one terminal device transmits data using the same time-frequency resource, the method comprising:

the network device receives a first symbol sequence sent by the first terminal device, where the first symbol sequence is generated by the first terminal device by linearly adding N groups of symbol sequences, the N groups of symbol sequences are generated by the first terminal device by processing N groups of data according to the N coding rates and the N transmission powers, the N groups of data are obtained by dividing the first data by the first terminal device, the N groups of symbol sequences correspond to the N groups of data one to one, and the N groups of data correspond to the N coding rates one to one;

the network device processes the first symbol sequence according to a power size order to obtain the first data.

2. The method of claim 1, further comprising:

the network device sends feedback information to the first terminal device, wherein the feedback information is used for informing the first terminal device that the network device successfully decodes j groups of symbol sequences in the first symbol sequence, and the feedback information is sent after the last decoding of the j groups of symbol sequences is successful, and j is less than or equal to N.

3. The method according to claim 1 or 2, wherein the network device processes the first symbol sequence in order of power magnitude to obtain the first data, comprising:

the network equipment detects the first symbol sequence to obtain N receiving powers corresponding to the N groups of symbol sequences in the first symbol sequence one by one;

the network equipment processes the N groups of symbol sequences one by one according to the sequence of the N receiving powers from large to small so as to obtain the N groups of data;

4. A method for data transmission, applied to a communication system including a network device and at least one terminal device, wherein the at least one terminal device transmits data using the same time-frequency resource, the method comprising:

a first terminal device in the at least one terminal device receives the first indication information sent by the network device, the first indication information includes rate indication information indicating N coding rates for first data and power indication information indicating N transmission powers for the first data, the N coding rates being in one-to-one correspondence with the N transmission powers, wherein the N coding rates are distinct from M coding rates for second data, the N transmit powers are distinct from M transmit powers for the second data, the M coding rates correspond to the M transmitting powers one to one, N is an integer greater than 1, the M is an integer greater than or equal to 1, the first data is data to be transmitted by the first terminal device, the second data is data to be sent by a second terminal device in the at least one terminal device;

the first terminal equipment divides the first data into N groups of data according to the N coding rates, wherein the N groups of data correspond to the N coding rates one by one;

the first terminal equipment linearly adds the N groups of symbol sequences to obtain a first symbol sequence;

5. The method of claim 4, wherein after the first terminal device transmits the first symbol sequence to the network device, the method further comprises:

the first terminal device receives feedback information sent by the network device, wherein the feedback information is used for informing the first terminal device that the network device successfully decodes j groups of symbol sequences in the first symbol sequence, and the feedback information is received after the last decoding of the j groups of symbol sequences is successful, and j is less than or equal to N.

6. A network device, for use in a communication system including the network device and at least one terminal device, wherein the at least one terminal device transmits data using the same time-frequency resources, the network device comprising:

a processing unit, configured to determine N coding rates and N transmission powers for first data, where the N coding rates and the N transmission powers correspond to one another, where the N coding rates are different from M coding rates for second data, the N transmission powers are different from M transmission powers for the second data, the M coding rates and the M transmission powers correspond to one another, the N is an integer greater than 1, the M is an integer greater than or equal to 1, the first data is data to be sent by a first terminal device of the at least one terminal device, and the second data is data to be sent by a second terminal device of the at least one terminal device;

a sending unit, configured to send first indication information to the first terminal device, where the first indication information includes rate indication information for indicating the N coding rates and power indication information for indicating the N transmission powers;

a receiving unit, configured to receive a first symbol sequence sent by the first terminal device, where the first symbol sequence is generated by the first terminal device by linearly adding N groups of symbol sequences, where the N groups of symbol sequences are generated by the first terminal device by processing N groups of data according to the N coding rates and the N transmission powers, where the N groups of data are obtained by dividing the first data by the first terminal device, the N groups of symbol sequences are in one-to-one correspondence with the N groups of data, and the N groups of data are in one-to-one correspondence with the N coding rates;

the processing unit is further configured to perform processing according to a power level order for the first symbol sequence to obtain the first data.

7. The network device of claim 6, wherein the sending unit is further configured to:

and sending feedback information to the first terminal device, where the feedback information is used to inform the first terminal device that the network device successfully decodes j groups of symbol sequences in the first symbol sequence, and the feedback information is sent after the last decoding of the j groups of symbol sequences is successful, where j is less than or equal to N.

8. The network device according to claim 6 or 7, wherein the processing unit is specifically configured to:

detecting the first symbol sequence to obtain N received powers corresponding to the N groups of symbol sequences in the first symbol sequence one by one;

processing the N groups of symbol sequences one by one according to the sequence of the N receiving powers from large to small so as to obtain N groups of data;

and obtaining the first data according to the N groups of data.

9. A terminal device, applied to a communication system including a network device and at least one terminal device, where the terminal device is a first terminal device in the at least one terminal device, and the at least one terminal device transmits data using the same time-frequency resource, and the terminal device includes:

a receiving unit, configured to receive first indication information sent by the network device, where the first indication information includes rate indication information indicating N coding rates for first data and power indication information indicating N transmission powers for the first data, and the N coding rates and the N transmission powers are in one-to-one correspondence, wherein the N coding rates are distinct from M coding rates for second data, the N transmit powers are distinct from M transmit powers for the second data, the M coding rates correspond to the M transmitting powers one to one, N is an integer greater than 1, the M is an integer greater than or equal to 1, the first data is data to be transmitted by the first terminal device, the second data is data to be sent by a second terminal device in the at least one terminal device;

the processing unit is used for dividing the first data into N groups of data according to the N coding rates, wherein the N groups of data correspond to the N coding rates one by one;

the processing unit is further configured to perform channel coding processing on the N groups of data respectively using the N coding rates to obtain N groups of code sequences, where the N groups of code sequences correspond to the N groups of data one to one, and perform modulation processing on the N groups of code sequences using the N transmission powers to obtain N groups of symbol sequences, where the N groups of symbol sequences correspond to the N groups of data one to one; linearly adding the N sets of symbol sequences to obtain a first symbol sequence;

a sending unit, configured to send the first symbol sequence to the network device.

10. The terminal device of claim 9, wherein after the sending unit sends the first symbol sequence to the network device, the receiving unit is further configured to:

and receiving feedback information sent by the network equipment, wherein the feedback information is used for informing the first terminal equipment that the network equipment successfully decodes the j groups of symbol sequences in the first symbol sequence, and the feedback information is received after the last decoding of the j groups of symbol sequences is successful, and j is less than or equal to N.